1. sc b4 agenda japan finalb4.cigre.org/content/download/2062/25742/version/3/file/report1id... ·...

CIGRE STUDY COMMITTEE B4 - HVDC AND POWER ELECTRONIC EQUIPMENT

The 42nd Session Regular Meeting Wednesday October 31, 2007

Osaka, Japan Righa Royal Hotel

Room Kaede 9:00 am to 6:00 pm

FINAL AGENDA

Item 1.0 Opening Comments Szechtman Acknowledgment of JNC hospitality and sponsorship 2.0 Minutes of Paris 2006 Meeting Long 3.0 Technical Committee Activities Report Szechtman TC Award 2006 Recent measures/changes adopted 4.0 Other Announcements Szechtman 5.0 Strategic Plan and Advisory Groups

5.1 AG 1& AG 02: Strategic Advisory Group and WG Conception

Zavahir, Damgaard

5.2 AG 4: HVDC System Performance Vancers

5.3 Tutorials and Communication Jyrinsalo 5.4 Web site Dhaliwal

6.0 Working Group Reports

6.1 B4-34: Capacitor Commutated HVDC Converters

Barros

6.2 B4-38: Simulation of HVDC and FACTS

Gole

6.3 B4-39: Integration of Large Scale Wind Power with HVDC and Power Electronics

Andersen

6.4 B4-40: Static Series Synchronous Compensator (SSSC)

Edris

6.5 B4-41: Systems with Multiple HVDC Infeed

Davies

6.6 JWG B2.17/B4/C1: Impacts of HVDC Lines on Economics of HVDC Projects

Graham

6.7 WG B4-44: Planning Guidelines Dealing with HVDC Environmental Issues

Faugstad

6.8 WG B4-45 : Technological Assessment of 800 kV HVDC Applications

Nayak, Sasmal

6.9 WG B4-46 : Voltage Source Converter (VSC) HVDC for power transmission – Economic Aspects and comparison with other AC and DC technologies

Westermann (represented)

6.10 WG B4-47: Special Issues in AC Filters

Shore, McLeod

6.11 WG B4-48:Testing VSC for HVDC Applications

Tang

Special Session on HVDC Transformers: 6.12 HVDC Converter Transformers Failure

Survey 6.13 Transient and Steady state electric field

distribution in oil/pressboard insulating systems for 800 kV HVDC transformers

6.14 JWG A2.28/B4, HVDC Converter Transfomer Test Procedures

Dhaliwal

Piovan

Saravolac

7.0 Future Meetings 7.1 2009 SC Meeting in Norway Meisingset 7.2 2011 SC Meeting in Australia Pahalawaththa 8.0 New Working Group Proposals

TCSC Performance Nilsson

9.0 Reports from IEEE and IEC 9.1 IEEE Woodford 9.2 IEC Travin

10.0 Reports from Other Committees or Organizations (Electronic format reports only) • CEPEL • CESI • CRIEPI • DOE

• EPRI (China) • EPRI (USA) • IREQ • Manitoba HVDC Research Centre • Russia • Other Organizations not Identified

11.0 Tribute to friends lost in 2006/2007

To Mr. Le Du Nguefeu To Prof. Reeve Long To Mr. Rowe Andersen

12.0 HVDC and FACTS Schemes under Construction or Planned (Participants to

provide electronic format reports with brief verbal summary, time permitting.)

13.0 Operational Experiences of Existing HVDC and FACTS Schemes

(Participants to provide electronic format reports with brief verbal summary, time permitting.)

14.0 Other Business 15.0 Adjournment

SC B4 –AG 01Strategic Advisory Group

Osaka 31 October 2007

AG Meeting Held on 28 Oct 2007

10:00-12:00 – Background13:00-17:00 – AG meetingFocus• AG-B4.01 Update• 2006 Survey Results• Action Plan review• Communication plan update• AG B4.02 WG Advisory Group Update• AG-B4.03 Environmental Update• AG-B4.04 Update• AG Membership

Attendees

1. Jussi Jyrinsalo CAG2. Poul Damgaard AG023. Kirsten Faugstad AG034. Narinder Dhaliwal Web Master5. Marcio Szecthman B4 Chairman6. Bill Long B4 Secretary7. Bjarne Andersen AG028. Stig Nilsson9. Boris Munoz Gebert10. Juan Carlos Araneda11. Jesus Gonzales Flores12. Nalin Pahalwaththa13. Mohamed Zavahir AG01

Strategic objectives

Strategic objectives of SC B4Target EducationActive participation of Members – skill matrixImproved communication with Target GroupsDecentralised activities (regional focus)Improved participation in WGs and SC activitiesTargeted SC B4 work - publicationsHelp Planners introduce HVDC as a viable optionTargeted EducationPublic acceptance of HVDC as a transmission technology

TargetGroups Plans

Mission&

Objectives

Strategies

Working Groups

Performance

Communication

How AG Fits into the SC B4SC Chairman

Advisory Groups Working Groups

Secretary

01 Strategic

02 WG Creation

03 Environmental

04 System Performance

WG B4-xx

WG B4-xx

WG B4-xx

WG B4-xx

05 Customer WG B4-xx

WG B4-xx

WG B4-xx

AG MembershipSC Chairman

Secretary

AG 04 System Performance

AG 03 Environmental WG B4-xx

AG 01 Strategic WG B4-xx

AG 02 WG Creation WG B4-xx

WG B4-xx

Kent Sobrink > Poul Damgaard

Kirsten Faugstad

Ivars Vancers

AG 05 Communication WG B4-xx

WG B4-xx

Mohamed>Nalin?

Jussi JyrinsaloWG B4-xx

Specific Actions

Review/Align Action PlanWebsite development

– Better use of WebsiteCommunication strategy and plan

– Importance recognised– Advisory Group, AG 05

Issue strategic documents in draft form for use/review

– WG Guideline– Communication strategy / Plan

Create and maintain a Skill Matrix < Member Input

AGB4-04CIGRE Osaka Symposium 2007

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CIGRE AG-04HVDC System Performance

– Convenor Ivars Vancers– Secretary Albert Leirbukt– TF1 Murray Bennet

» HVDC System Performance– TF2 Andrew Williamson

» HVDC Compendium– TF3 Narinder Dhaliwal

» Converter Transformer Survey

• Meeting October 30, 2007• Four members/six guests


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• TF1 – HVDC System Performance– System performance for 2005 and 2006– Draft paper for CIGRE 2008 under review

Received 30 reports for 2005 and

27 reports for 2006.


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Thyristor Reporting Systems

15

20

25

30

35

40

1996 1998 2000 2002 2004 2006 2008

Year

Rep

orts

Rec

eive

d

Actual Projected Linear (Actual)


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• TF2 – HVDC Compendium– Andrew Williamson taking over from Per Olof

Lindh– Compendium being reorganized for ease of access– Updating requires input from newer projects– Requests sent out, followup being done– Copies available from AG on CD


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• TF3 – Converter Transformer Failure Survey– To be reported by Narinder Dhaliwal

• Manitoba Hydro Operating Experience – John McNichol presented past years experience

• Wall bushing flashover resulting in failed thyristors

Tutorials and communication

Jussi JyrinsaloB4 AG 01

Present activities• Most of our work is done in working groups that regularly

publish Electra papers and Cigré brochures. This is a fine way to promote the technical progress and exchange of deep knowledge within our field.

• Looking at the 2006 survey results, there are lots of suggestions for new WGs (especially economics and life-cycle issues), but only a couple of people willing to participate more in their work.

• However, the survey also shows that people/companies would be willing to organize local activities where already existing knowledge would be utilized.

• Actually, B4 has organized quite a many tutorials during the last few years.

Latest B4 tutorials/workshops

• A two-day workshop "HVDC technology" in Norway in April 2006 (lecturers B. Davies, B. Andersen and M. Szechtman)

• A two-day tutorial "HVDC systems and power electronic technological development" in Indonesia in November 2006 (lecturers M. Rashwan and N. Dhaliwal)

• Contribution to a symposium on UHV in China in July 2007?

Osaka tutorial

• A one-day tutorial, October 30:– HVDC planning (by Brett Davies)– AC filters in HVDC systems (by Norman

Macleod)– Japanese HVDC & FACTS projects (by

Shoichi Irokawa)• Over 50 participants, most of which local

young engineers

Other communication needs• Getting information is becoming a more important

motivation to be a member; more data should be available for members to use when dealing with new interest groups, such as regulators, investors and environmental groups, that have a strong influence on where and how the technology is used.

• In addition to working group publications, we will need user-friendly information for non-experts (application alternatives, economical and environmental impacts).

• We have a new website which, according to the 2006 survey, people have a strong interest in. The website can be developed to include more education/ presentation material as well as up-to-date information on HVDC/FACTS projects and contact persons.

Specific actions to be taken in 2007...2008

• Communication as a separate Advisory Group: technical, economical, environmental and social aspects will have to be kept in mind => action plan for each target group

• New material to the website (for members to use):1. Collecting existing material: presentations from tutorials and

workshops, progress reports from working groups, ...2. More data on the projects: environmental database,

bibliographies, contact persons, ...3. Short HVDC/FACTS application guide (for each target group?)4. Good case studies showing the benefits of the technology5. Skill matrix of B4 members and experts

• Target group surveys to find out additional communication needs, e.g. local tutorials/workshops

Appendix: Study Guide Outline 1. Introduction: Definitions, Requirements 2. Study Requirements for HVDC & FACTS (Retzman/Gole)

1. Basic Understanding- 1. real system may exist or be off limits. 2. Provides important Sensitivity Information

2. Equipment Design- 1. Permits investigation of various potential options 2. estimation of stresses and ratings, 3. placement of devices

3. Controller Design 1. Topology Selection 2. Parameter Selection 3. Testing (Hardware in Loop)-Factory Test

4. Commissioning 1. Checking last minute changes 2. Debugging

5. Operation 1. Analysis of Unexpected Operation 2. Modifications

3. Simulation Tools and their features 1. Load Flow-including Vstab. tools/Stability (Annakkage/Eremia) 2. Frequency domain Analysis (Annakkage/Madajewski) 3. Transient Simulation (Gole)

• Off-Line • Real Time (Maguire)

4. Harmonic Tools (Gumede/ Retzman) 5. Reliability Tools? 6. Network Reduction Techniques (Eremia/ Irwin/Ruhle)

4. Hybrid Simulation Technologies • Hardware in Loop (Steurer/ Retzman/Maguire) • Program Coupling (Gole/ Lei) • Interfaced Simulators (Santo/Steurer) • Advanced Multiple run/Optimization based tools

(Gole/Mahseradjian) 5. Tool Validation (Wachal / Kell) 6. Study Examples – List of Successes (Irwin/ Kell/Ruhle/Oh/Steurer) 7. Future Developments & Perspectives (Ani Gole – very brief outline) 8. Conclusion 9. References

30/10/2007 CIGRE B4 Meeting Osaka 1

CIGRE WG B4.39

Integration of Large Scale Wind Power using HVDC and Power

Electronics

Convenor: Dr Bjarne Andersen


Meetings

• Work commenced in Paris August 2004• 2nd Meeting January 2005, Manchester, UK• 3rd Meeting Sept 2005, Bangalore, India• 4th Meeting February 2006, Madrid, Spain• 5th Meeting August 2006, Paris, France• 6 Telephone Meetings to progress studies• 6th Meeting, October 2007, Gdansk, Poland


Membership

• Total Membership is 17- 10 Classified as Major Contributors (10)- 7 Provides occasional contributions

• Members not contributing have been gradually removed from distribution list (was 28 in 2005 and 19 in 2006)


Report Structure

• Introduction• Overview of Wind Generator Technology• Interactions between Wind Farm and AC network• Overview of Grid Codes• FACTS and its application for wind farm integration• FACTS and its application for wind farm integration• Case studies• Bench Mark model for studies• Sample Studies (AC, LCC HVDC, VSC Transmission)• Economical overview• Future Developments• Conclusion


Benchmark model

Bus 6

Bus 12Bus 3

Bus 11Bus 8

Bus 7

Bus 1

Bus 9

Bus 2Bus 10

Bus 5

Bus 4

AREA 2

AREA 3

AREA 1

230 kV

230 kV

345 kV


Progress

• Drafts of all chapters are being reviewed/edited (case and own studies not complete)

• Studies were successfully progressed by telephone meeting

• Studies discussed in detail in Paris 2006 and are now commencing.

• No further meetings are planned. - Final version of chapters will be circulated internally before submission

• Target completion date is January 2008

B4-41

Systems with Multiple DC Infeed

Report to Study Committee B4

Osaka, JapanOctober 2007

Status

Chapter 1- Introduction and Basic Concepts CompleteChapter 2 – Interaction Phenomena CompleteChapter 3 – System Examples Canada and Denmark complete, awaiting contributions from Norway and ChinaBibliography Complete

Status (cont’d)

Expect to have a draft together for general B4-41 comment later in November.Hopefully finalized by the end of the year.

1)MIESCR2)MIIF3)Detailed studies

1)ESCR2)Detailed studies

Operating Indicator

1) Detailed studies2) MIESCR

1)Detailed studies2)ESCR

Control Interaction

1)MIESCR2)Detailed studies3)One amp injection


Harmonics

1)MIESCR2)Detailed studies


TOV

1)CMIESCR2)MIESCR3)Detailed studies

1)CESCR2)ESCR3)Detailed studies

P/V Instability

1) MIESCR2) Detailed study3) Contour map4) MIIF

1) ESCR2) Detailed study3) Contour map

Fault Recovery, including Commutation Failure Performance

1)MIESCR2)MIIF3)ESCR

1) ESCRBasic Indicators

Multi InfeedSingle Infeed

K.FaugstadWG B4-44 - 31 Oct 2007

SC B4, OSAKA 2007

WG B4-44 Planning Guidelines Dealing with HVDC Environmental Issues

Scope of Work:1. Collect and systemize information from planned and existing

HVDC links in operation on the following main issues

2. Create a database on HVDC Environmental issues

3. Propose guidelines on how to deal with environmental issues during planning and operation of new HVDC links


SC B4, OSAKA 2007

WG B4-44 Activities last year

• WG Meeting in Paris 2006 narrowed the scope to earth return coming year

• Questionnaire on environmental experience of ground return sent out

• 20 answers collected for about 30 links

• WG Meeting in Oslo in May 2007

• Paper prepared for Osaka


SC B4, OSAKA 2007

21, rue d’Artois, F-75008 PARIS

http : //www.cigre.org

Paper 328An environmental survey on the operation and impact of HVDC electrodes

By WG B4-44 HVDC Environmental Issues

Convener *K. Faugstad,Statnett SF (Norway)

M. O’BrienConsultant

Ex.Transpower(New Zealand)

M. RashwanTransgridSolutions(Canada)

M. SmithMoyle

Interconnector(Ireland)

M. ZavahirTranspower

(New Zealand)


SC B4, OSAKA 2007

WG B4-44 Further plans

• Start collection of information for environmental database – ground return

• Propose guidelines on how to deal with environmental issues during planning and operation –ground return

• Part 2. New Questionnaire on environmental experience with converter stations, HVDC cables and overhead lines


SC B4, OSAKA 2007

The group has 14 members from:New Zealand, Ireland, Canada, Denmark, New Zealand, Finland, South Africa, Brazil, USA, Chile and Norway

We request members from:•Sweden

•India

•China

•Japan

•Universities

•Manufacturers


SC B4, OSAKA 2007

Environmental issues:

• Electrodes: – Corrosion due to electric fields from electrodes (on third

party property, pipelines etc)– Chlorine emission from the anode and its impact on

marine life– Safety– Current interference (railroad signals)– Heating / drying of ground

• Converter station:– Audible noise and visual impact– Losses – Include P.E (FACTS) if applicable


SC B4, OSAKA 2007

• HVDC cable :– Magnetic and electric fields – Impact on magnetic compass deviation– Impact on marine life– Visual impact– Heating / drying of ground– Oil leakage

• Overhead line– Magnetic and electric fields

– Visual impact

– Harmonic disturbance from HVDC overhead lines

– Audible noise

– Corona

– Ion generation

– Comparison of DC and AC lines (environmental – above items)

– Birds navigation?

Environmental issues:

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SC B4WG B4-45

CIGRE WG B4-45 “Technological Assessment of 800 kV HVDC Applications”

SC B4 Meeting - 2007Japan

Convener: R. N. Nayak (India)

JWG B4-43

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Membership Status

ChinaCSGHong Chao

ChinaSGCCLiu Zehong

USATVAIan Grant

NetherlandsKEMAYanny Fu

UKArevaNorman M Macleod

SwedenABBVictor Lescale

GermanySiemensHartmut Huang

BrazilABBJohn Graham

CanadaTransgridMohammed Rashwan

India (Convener)

POWERGRIDR N Nayak

JWG B4-43

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WG Activities to date

1st WG Meeting in Jan, 2006, New Delhi/India

2nd WG Meeting in Aug. 2006, Paris/France (Review of 1st Version of Report)

3rd WG Meeting in July. 2007, Beijing/China (Review of 2nd Version of Report)

4th and final WG Meeting is scheduled for Aug. 2008, Paris / France (Review Final Version of Report)

WG Progress On Schedule !

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SC B4WG B4-46

Voltage Source Converter (VSC) HVDC for power transmission – Economic Aspects and Comparison with other AC and DC Technologies

SC B4 Meeting - 2007Japan

Convener: Dirk Westermann

JWG B4-43

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Membership Status

Name Com Cty RM WG From To

Dirk Westermann TU Ilmenau CH B4 09/06 Dato

Dag Soerangr SIEMENS DE - 09/06 Dato

Gunnar Asplund ABB SE - 09/06 Dato

Dirk van Hertem KULeuven BE - 09/06 Dato

John Haddow Electranet AU - 09/06 Dato

Masahiro Takasaki CRIEPI JP B4 09/06 Dato

Further applicant from Norway

Desired further members

Representative from US Utility World

Representative from consulting business (e.g. KEMA, Babcock & Brown)

JWG B4-43

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WG Activities to date

ToR approval & Member collection

1st WG Meeting on Oct. 17, 2007, Erlangen, Germany

Focus: VSC HVDC as an embedded part of bulk power systems

Interconnection between large systems

Interconnection for islanded AC systems (e.g. wind) for power generation and or consumption (> 500 MW)

Point to point connection of the meshed grid

Utilization of the following definition:

Expected outcome: Guideline to perform economic assessment, applied to typical application areas

Working Group B4-47

Special Issues in AC Filter Specifications for HVDC

WG is reviewing four topics

• Rating of filters in the presence of background harmonics• Specification of network impedance• Current based harmonic interference criteria, such as IT product• AC – DC harmonic interaction

WG Members

• Nigel Shore United Kingdom Convenor• Norman MacLeod United Kingdom• Jeremy Price United Kingdom• Thomas Westerweller Germany• Anders Petersson Sweden• Ian Grant Unites States• Einar Larsen United States• Nils Henrik Jendal Norway• Andre Coutu Canada• Bob Burton Canada• Charles Clark Canada• Kelvin Kent Canada• R P Sasmal India

WG Members

• Weimin Ma China• Xiao Yao China• Guilherme Sarcielli Luz Brazil• Ricardo Andre Goncalves Brazil• Peeter Muttik Australia

• Manufacturers 6• Utilities 8• Consultants 2• Academia 1

WG Meeting Schedule

• Initiation August 2006 Paris• 1st meeting October 2006 Stafford• 2nd meeting March 2007 Erlangen• 3rd meeting October 2007 Osaka (cancelled)

• Heavy work load in HVDC business has resulted in WG members unable to progress the draft report or attend WG meeting.

• Next meeting Nov/Dec 2007 ? Ludvika ?

CigreCigre B4. WG48B4. WG48

Guangfu Tang

Components Testing of VSC Components Testing of VSC System for HVDC applications System for HVDC applications

CIGRE SC B4 Meeting, Osaka, Japan, Oct. 2007

1

1. Background1. Background

• Approved by TC Chairman : Klaus Fröhlich, on Nov.

7th, 2006.

• Aim at creating a test philosophy and procedures and

proposing reasonable acceptance criteria for testing of

VSC System for HVDC applications

•Appointed as the convenor of the working group by

Chairman Dr. Marcio Stzechtman on January 2007.

2

2. Scope of Work2. Scope of Work

1. Define components and subsystems to be tested.

2. Define operational and fault scenarios to be

considered for the tests.

3. Create a test philosophy and procedures for the

components (dielectric tests, operational tests).

4. Propose reasonable margins and acceptance criteria

for the tests.

3

3.Memberlist 3.Memberlist

UniversityTNCTProf. Shigeru TANABEMemberSupplierAREVADr. Changjiang ZhanMember

SupplierSiemensMr. Joerg DornMemberSupplierABBMr. Jonas LindgrenMember

Convenor Dr. Guangfu Tang CEPRI Institute

Member Mr. Akira KAWAGUCHI Toshiba-Mitsubishi

Supplier

Member Dr. Qianjin Liu ABB China SupplierObserver Dr. Zhiyuan He CEPRI Institute

4

4.The First Meeting4.The First Meeting

The first meeting was held in Beijing on Mar.22-23 2007.

All members presented the first meeting

5

Change the title into “Components Testing of

VSC System for HVDC applications” .

Define the technical brochure draft outline.

Preliminarily divided the responsibilities of

working group members.

5. The Second Meeting5. The Second Meeting

The second meeting was held within two days.

6

A good team (after the meeting)

Dr. Huang Hartmut Insteads of Mr. Joerg Dorn. Prof. Shigeru TANABE was absent.

Dr. Grigory to attend our meeting as new member. Mr. Klaus Papp joined us as new member.

Dr. Teruo Yoshino: from Toshiba Mitsubishi-Electric Industrial Systems Corporation . Prof. Isao IYODA: from Osaka Perfectural College of Technology.

8

Renew and detail the outline of the technical brochure

Define the components and subsystems to be tested in

details.

Define operational and fault scenarios to be considered for

the tests in details.

Divide the responsibility according to previous contribution

and specialty of the working group members.

6. Relationship With IEC WG156. Relationship With IEC WG15

The Title of IEC WG15: Electrical Testing of Voltage Source Converter (VSC) Valves for High Voltage Direct Current (HVDC) Power Transmission

Convernor: Dr. Baoliang Sheng (ABB) Members: including Mr. Jörg Dorn, Dr. Teruo Yoshino

and me.

Based on IEC 60700-1: Thyristor valves for high voltage direct current (HVDC) power transmission ⎯ Part 1: Electrical testing

9

10

Proposed time schedule for CIGRE WG B4.48Time Task Place

Mar.22-23 2007: Members complete, first meeting Beijing, China

Oct. 28-31 2007: 2nd meeting, scope 1 and 2 details are defined Osaka, Japan

Mar.27-28 2008:

3rd meeting, scope 1 and 2 working discussion Germany

Sep. 2008 4th meeting, scope 1 and 2 ready, scope 3 and 4 working discussion Paris, France

Jan. 2009 5th meeting – finalization of documentation Sweden

Sep. 2009 Work complete; Technical Brochure finished

7.Schedule7.Schedule

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8. 8. Problem and SuggestionProblem and Suggestion

Different feasible topologies shall be considered in the work as well as different type of schemes.The operational losses of VSC system is also included in the WG48.

Hope some people from utility join us!

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Thanks for your attention！

JWG A2/B4JWG A2/B4--2828AGAG--B04B04

CONVERTER TRANSFORMER CONVERTER TRANSFORMER FAILURE SURVEY 2007FAILURE SURVEY 2007

BYBY

N. DhaliwalN. Dhaliwal

REPORTING PERIODREPORTING PERIOD

FAILURES IN YEARS20052006

QUESTIONNAIREQUESTIONNAIRE

- NUMBER OF RESPONSES 29

- SYSTEM WITH NO FAILURES 12

- SYSTEMS WITH ACTUAL FAILURES 7

- SYSTEMS WITH PREVENT FAILURES 11

- SYSTEMS WITH MULTIPLE FAILURES 3

SYSTEMS REPORTINGSYSTEMS REPORTING• INDIA

– ALL PROJECTS

• CHINA– ALL PROJECTS

• ITIAPU• NEW ZEALAND• NELSON RIVER• SWEPOL• BALTIC CABLE• CROSS CHANNEL• FENNO SKAN

SYSTEMS NOT SYSTEMS NOT REPORTINGREPORTING

• PACIFIC INTERTIE• HYDRO QUEBEC – NEW ENGLAND• CAHORABASSA-APOLLO• THAILAND – MALAYSIA (BOTH ENDS)• KII CHANNEL• BtB LINKS IN US

RESULTSRESULTSACTUAL PREVENT

• 2005-06 15 20

• 2003-04 12 45

• 1991-2002 53 23

7+1P1P10P16+6P1+2PTotal15+20P

Unknown

Operator

Ind. Curr

1-TianGuan1P-NR1

1P-RTE1P-Baltic6P-SewPol

2P-NR12P-NR2

2P-GezNanq1-Lingbao BtB

Thermal2+16P

4-Chand BtB2-Vizag I

1P-3G_Chang2P-3G-Guang

1-Itiapu4-Rihand2-Chand_Ph1P-Skgrk 3

Dielect13+4P

Mech

GInternalConn.

FCore &Magn.Shields

ELTC

DStatic

Shields

CAC

Wdgs

BValveWdgs

ABushings

Category- >

Summary of Transformer Failures 2005-2006

* Failure involved more than one category

0 + 30P0 + 8P0 + 0P0 + 0P1 + 3P11 + 0P0 + 4PTotal12+45P

Unknown0+0P

Operator0+0P

1P-SwePolInd. Curr0+1P

1P-Zhengp7P-Vizag17P-Sasram

13P-Chand BB

4P-EGAT4P-TNB

Thermal0+36P

1P-Chezu1 – NR BP11P-NR BP12P-NR-BP2

2 – Rihand4 – Chand.Ph5 - Itiapu

4P- LongquDielect12+8P

Mech

GInternalConn.

FCore &Magn.Shields

ELTC

DStatic

Shields

CAC

Wdgs

BValveWdgs

ABushings

Category- >

Summary of Transformer Failures 2003-2004

1 + 4P0 + 7P11 + 2P1 + 1P5 + 0P27 + 6P8 + 3PTotal53+23P

1-Eel R1-Haenam1-Welch

1-PIE-Upg1-S.Butte1-S.Pond1-V.Smith1P-Madws

Unknown7+ 1P

1-IPPOperator1 + 0P

1P-K.Skn21-H.Gate2P-H.gate

Ind.Curr1 + 3P

1P-C.C.2P-SwPol

2-NR2Thermal2 + 3P

1-C.C.3P-C.C.

1-Haenam*2P-K.Skn2

1-F.Skan1-Gzhba1-R.Dadri

1-NR12-R.Dadri

2-Chatgy2-Chand1-NR16-NR2

1-Haenam2-Itaipu

10-R.Dadri4P-Chatgy

1-Skagrk2-Gezhba

Dielect33 + 9P

1P-Skagrk1P-NR21P-K.Skn2

2-Kontek2-C.C.

2P-F.Skan

1-Radsn1-PIE-Ex1-Itaipu1-H.Hnsh11P-Itaipu1P-F.Skan

Mech8+ 7P

GInternalConn.

FCore &Magn.Shields

ELTC

DStatic

Shields

CAC

Wdgs

BValve

Windings

ABushings

Category1991-2002

FAILURE RATEFAILURE RATEFAILURE RATE HISTORY

0.0000

0.0200

0.0400

0.0600

0.0800

0.1000

0.1200

1991 2002 2005 2007

REPORTS

FAIL

UR

E R

ATE

ACTUAL PREVENT TOTAL

FAILURES BY IN SERVICE YEARFAILURES BY IN SERVICE YEAR

23232492001-2006

312130491996-2000

66838111991-1995

90562743191986-1990

1281160141981-1985

17181880101970-1980

PREVENT FAILURES

ACTUAL FAILURES

TRANSYEARS

NO OF SYSTEMS

YEAR IN SERVICE

FAILURE RATE BY YEAR COMMISSIONED

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

1970 -1980 1981-1985 1986-1990 1991-1995 1996-2000 2001-2006YEAR COMMISSIONED

FAIL

UR

E R

ATE


ONLY SMALL PROJECTS ADDED

CONVERTER TRANSFORMERFAILURES 1991-2004

0

10

20

30

40

50

60

70

80

90

1-2 1-3 1-4 3-2 3-3 3-4PHASE-WDGS

# O

F FA

ILU

RE

FAILEDPREVENT

CONVERTER TRANSFORMER FAILURES IN 2005-2006

02468

10121416

1-2 1-3 1-4 3-2 3-3 3-4PHASE-WDGS

# O

F FA

ILU

RES

ACTUALPREVENT

FAILURES BY MVA RATING1 PHASE, 3 WDG

0

10

20

30

40

50

225 235 300 315MVA

IN SERVICE ACTUAL FAIL PREVENT FAIL

MOSTLY BtB

IPP PROJECTIPP PROJECT• IN OPERATION FOR 21

YEARS

• 1920 MW, 500kV

• NORMAL TRANS RATING 375 MVA

• DESIGNED FOR 1.25 P.U. CONTINUOUS OVERLOAD (468MVA)

• NO FAILURES

IPP PROJECTIPP PROJECT

• NO FAILURE BECAUSE IT IS OVERDESIGNED FOR NORMAL OPERATION?

• OR JUST A GOOD DESIGN ?

CIGRE SC B4, 42nd Meeting, Osaka 2007

1

Transient and steady state electric field distribution in oil / pressboard insulating systems for 800 kV HVDC transformersSignificance of testing according to IEC

and IEEE standards

Ugo Piovan


2

Transient and steady state electric field distribution in oil / pressboard insulating systems for

800 kV HVDC transformersSignificance of testing according to IEC and IEEE

standards • DC electric fields and time to get to DC steady state• Present DC and Polarity reversal tests• Influencing factors for oil/board conductivities• Oil / pressboard insulating systems for 800 kV HVDC

transformers• Simulations to investigate the effect of polarization time and

of oil type on PR test• Summary and conclusions


3

DC Electric fieldsSteady state voltage distribution for DC fields depends on ratio of materials conductivities.

However, before reaching the DC steady state (or after a Polarity Reversal), voltage distribution depends:

• on materials conductivities and their ratio• on materials permittivities and their ratio• time

A: t=0s

tA

B C DUDC


4




tA

B C DUDC

B: t=60s


5




C: t=2700s

tA

B C DUDC


6




D: t=5400s

tA

B C DUDC


7

Time to reach DC steady state depends on :

• on materials permittivities and conductivities (the lower the conductivities the longer the time)

• The amount and shape of solid insulation (the more solid insulation the longer the time)

Time to reach DC steady state


8







9

Present DC and PR Dielectric TestsBoth IEC 61378-2 and IEEE C.57.129 prescribe:• 120 min for DC test• 90-90-45 min for Polarity Reversal

Picture from IEEE C.57.129


10

Present DC and PR Dielectric Tests (continued)

The cornerstone of dielectric testing is to simulate the nominal stress applied for the lifetime of the equipment by means of a higher than in service dielectric stress applied for the duration of the test.

We need to verify whether this is the case for DC and PR tests for present and future HVDC transformers.


11







12

0 10 20 30 401 .10 15

1 .10 14

1 .10 13

1 .10 12

1 .10 11

20 40 60 80 1001 .10 15

1 .10 14

1 .10 13

1 .10 12

1 .10 11

Influence of temperature, moisture and electric field on oil/board conductivities

Both oil and board conductivities depend on:Temperature Moisture Electric

field strength

temperature [C]

Cond

uctiv

ity [S

/m]

oil moisture [ppm]board water content [%]

electric field [kV/mm]Oil

Board

0 6 12 18 241 .10 15

1 .10 14

1 .10 13

1 .10 12

1 .10 11


13

Oil conductivities at 20 °C

Measurement Time [min]

Con

duct

ivity

[S/m

]

Aged Oils (from AC transformers)

New Oils


14







15

Oil / pressboard insulating systems for 800 kV HVDC transformers

Reliability is of extreme importance for 800kV HVDC transformers.

Therefore there is need to reassess the effectiveness of present dielectric tests considering:

• Longer time to get to DC steady state due to more solid insulation

• Possible variation of oil conductivity between test and beginning of service


16



standards • DC electric fields and time to get to DC steady state• Present DC and Polarity reversal tests• Oil / pressboard insulating systems for 800 kV HVDC

transformers• Influencing factors for oil/board conductivities• Simulations to investigate the effect of polarization time and



17

Material conductivities for simulationsFor this study we identified 2 cases:

• Oil1 σ = 10-14 S/m (Case 1, Oil used during tests)

• Oil2 σ = 10-13 S/m (Case 2, Oil at the beginning of theservice)

Transformerboard TIV σ = 10-15 S/m (oil impregnated)


18

Bushing with Faltenbalg

Bushing

Turret

Faltenbalg

Bushing Creep Path


19

Test Voltage Wave shapesg

TPR TPR TPR/2

g

TPR TPR TPR/2


20

Creep stress on bushing creep path at instant of max peak stress during PR with oil σ = 10-13 S/m

0 50 100 150 200 250 300 350 400 450 500 5500

0.5

1

1.5

2

2.5TPR = 90 TPR = 180TPR = 360TPR = 720

mm

kV/m

m

TPR = 90 min

TPR = 720 min


21

0 50 100 150 200 250 300 350 400 450 500 5500

0.5

1

1.5

2

2.5120% TPR = 90 TPR = 720

mm

kV/m

m


Stress with 90 min polarization time and

120% test voltage

Stress with 720 min polarization time and

100% test voltage


22


0 50 100 150 200 250 300 350 400 450 500 5500.5

0

0.5

1

1.5

2

2.5 TPR = 90 TPR = 180TPR = 360TPR = 720

mm

kV/m

m


23

Comparison table of bushing max peak creep stresses during PRs

Simulations results are summarized in the table below:

90 180 360 720 ∞10-13 0.819 0.905 0.968 0.994 1.00010-14 0.288 0.294 0.302 0.308 0.310

σ Oil [S/m]

TPR [min]

1 pu = max peak creep stress on bushing with a PR from DC steadystate and oil conductivity = 10-13 S/m


24

90 180 360 720 ∞10-13 0.819 0.905 0.968 0.994 1.00010-14 0.288 0.294 0.302 0.308 0.310

σ Oil [S/m]

TPR [min]

Effects of polarization time


• The peak stress with the current 90-90-45 min PR test achieves just 82% of the stress resulting from a PR from DC steady state.


25

90 180 360 720 ∞10-13 0.819 0.905 0.968 0.994 1.00010-14 0.288 0.294 0.302 0.308 0.310

σ Oil [S/m]

TPR [min]

Effects of oil conductivity• Oil conductivity affects greatly the severity of the test.• The effectiveness of PR and DC tests is doubtful if a low

conductivity oil is used for tests and an oil with higher conductivity is used in service.



26







27

Conclusions about polarization time

• Present 90-90-45 min PR test does not allow to reach full stress levels during tests

• PR test could be addressed by increasing the polarization time to 360-360-180 min but there are practical constrains.

• An alternative approach is to modify the test voltage waveform (initial overvoltage to shorten the time to reach steady state peak stresses). This is presently under investigation.


28

Conclusions about oil types

Severity and therefore effectiveness of PR and DC test depends greatly on difference in oil conductivity between test and at beginning of service (before any aging takes place).


29

Thank you for your attention!

JWG A2/B4JWG A2/B4--2828HVDC Converter Transformers HVDC Converter Transformers

Progress Report No.5Convener: Milan Saravolac

SC B4 Meeting Osaka, October 2007

JWG A2/B4-28 Progress Report #5, October 2007

Contents

MeetingsJWG Members – current statusA2 Members Meeting in BrugesJWG Progress SummaryAction Plan Update


MeetingsParis, 30th August 2004, InauguralArnhem (KEMA), 27th January 2005Bangalore, 21st September 2005 (SC B4 Colloquium)Rapperswil (Weidmann), 27th January 2006Paris, 28th August 2006Sao Paulo, 15th & 16th February 2007Osaka, 29th & 30th October 2007


Convenor: M.Saravolac France

Active members: A.C. Hall UKG.M.Bastos BrazilJ.Hajek SwedenJ.M.Malik India

Z.Liu China

N.S.Dhaliwal Canada

P.Heinzig Germany

P.W.Christensen Denmark

T.Freyhult Sweden

U.Piovan Italy

V.Prasher India

Y. Fu NetherlandsCorresponding members: C.Peixoto Brazil

M.Jordanoff New Zealand

R. Cormack RSA

Observers: J. F. Graham Brazil

665

17

Equipment ManufacturersSystem OperatorsOther: Insulation Suppliers, Consultants,…Total

JWG Members – October 2007


Reliability Questionnaire – Update for 2005 & 2006

JWG Progress Summary

FAILURE RATE HISTORY

0.0000

0.0200

0.0400

0.0600

0.0800

0.1000

0.1200

1991 2002 2005 2007

REPORTS

FAIL

UR

E R

ATE


2005 – 2006 vs 2003-2004The total failure rate decreasing…


Reliability Questionnaire – Update for 2005 & 2006


FAILURE RATE BY YEAR COMMISSIONED

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

1970 -1980 1981-1985 1986-1990 1991-1995 1996-2000 2001-2006YEAR COMMISSIONED

FAIL

UR

E R

ATE


2001 – 2006Decrease in actual failures and increase in prevented failures


Design Review GuideHVDC Converter Transformers• The new guide is based on and derived from the

existing document, “Guidelines for Conducting Design Reviews for Transformers 100 MVA and 123 kV and above” created by the CIGRE WG 12.22 and published in 2002 as CIGRE Brochure No. 204

• Issue after meeting in Osaka, October 2007

Progress Summary


A2 members meeting in Bruges – 10/10/07

Attendees: G. Bastos, P. Heinzig, R. Cormack, A.C. Hall, C. Krause (for U. Piovan), M. Saravolac

SummaryAgreed to investigate as to how to modify the test procedure (applied voltage waveform) in order to come closer to the steadystate stress profiles within existing/practical test duration. This is in order to account for the variation of the oil resistivity.Agreement to look into implications of proposing an extra heat run test of the short duration as a routine test in order to check the oil flow circuit.



Test Specification

• The duration of the PR test is unlikely to be extended due to practical constraints.

• A requirement for polarity reversal test is under review for cases of unidirectional UHVDC links.

• The DC/PR test waveform is under review. • Value of the oil conductivity should be measured at test and at

the beginning of service (and preferably during the service).• Transient dielectric field simulations should be performed with

different values of oil conductivity in order to relate stress profiles during service with design values and stresses experienced during tests.



Test Specification

• Consideration of the additional, short, routine heat-run test for checking hydraulic circuits.



Action Plan

By the 2007 B4 Symposium, to issue theDesign Review Guide and complete a draft proposal for the test recommendations.By the end of 2007 to finalizeTest Recommendations. By the CIGRE 2008 Conference to have a Tutorial on Reliability of HVDC Transformers.By CIGRE 2008 to issue a Final Report.

JWG A2/B4JWG A2/B4--2828HVDC Converter TransformersHVDC Converter Transformers

Thank you for your attention

CIGRÉ SC B4 2009 MEETING, BERGEN AND THE FIORDS, NORWAY

June 6June 6--11, 200911, 2009Bergen and Ullensvang,Bergen and Ullensvang,

NorwayNorway

Bergen

The Organising Committee

NorwaySintef Energy ResearchNils FlatabøNorwayNexansKjell Bjørløw-LarsenSwedenABBGunnar AsplundDenmarkEnerginet.dkKent SøbrinkDenmarkEnerginet.dkPoul DamgaardFinlandFingridJussi JyrinsaloNorwayStatnettMagne MeisingsetNorwayStatnettHåkon Borgen (chair)

Main sponsorship by Nordic TSOs, consultants, research institutions and leading manufacturing companies in HVDC and FACTS

Preliminary Program

BergenColloquiumThursday, June 11th

Kollsnes rectifier stationTechnical Visit

Hardanger fiordMorning boat transport to Bergen

Wednesday, June 10th

UllensvangSC Meeting and evening dinnerTuesday June 9th

Evening dinner

Hardanger fiordAfternoon boat transportation to Hotel Ullensvang

Monday June 8th

BergenWG MeetingJune 6-8thLocationEventDate

• June 6-8th

Working Group Meetings • June 11th

Colloquium

Radisson SAS Royal Hotel Bergen

Hotel Ullensvang

• June 9thSC Meeting & Evening Dinner

June 10th Technical VisitKollsnes VSC rectifier station

Courtesy: StatoilHydro

June 11th Colloquium

Invited presentations grouped in different topics. The topics below are preliminary.

#1 Presenting the Nordic case#2 System challenges for HVDC and FACTS#3 New technological development#4 Developments in HVDC cable technology

The Nordic Regional Council of Cigré (NRCC) welcomes you all to

Bergen and the fiords in June 2009.

When the web-site for the event is established, a link from http://www.cigre-b4.org/ will be set up.

Leaflet prepared for distribution in Osaka

2011 Study Committee B4 Meeting

Australia-New Zealand

Invitation

The Chairman of the Cigre Australian National Committee has invited the Study Committee to hold the 2011 meeting in Australia - New Zealand region.

2007 SCB4 Meeting Osaka, Japan

Introduction

• Cigre Australian National Committee (ANC) plays a very active role within Cigre and strongly supports progress of engineering in the region.

• ANC has mirrored the Cigre study committee structure in the regional level.

• Australian Panel of Cigre B4 (AP-B4) is tasked with leading the HVDC and Power Electronic related activities in Australia and New Zealand


HVDC Activities in the Region by 2011


Direct Link (VSC)

Murray Link (VSC)

Basslink

HVDC Activities in the Region by 2011


Replacement of Mercury Arc Pole of New Zealand Inter island HVDC Link –likely to be commissioning by 2011-2012

Proposed Program


Working Group Meetings (Queensland)

Colloquium (Melbourne)

Study Committee Meeting (Victoria)

Site Visit (Basslink)

Conclusion

Cigre ANC and APB4 are looking forward to hosting the B4 Study Committee and Working Group meetings in Australia - New Zealand region in 2011.


October 31, 2007 AGENDA ITEM 9.1: IEEE LIAISON TO CIGRE STUDY COMMITTEE B4 Ben Mehraban is the new Chairman of IEEE Subcommittee on HVDC and FACTS. Robyn Taylor is the Secretary. Recent Awards: Peter Lips received the Uno Lamm Award Ani Gole received the Narain G. Ningorani FACTS Award. The Subcommittee met in January and June in Florida in 2007. The Working Groups in operation are: WG 15.05.02 Dynamic Performance and Modeling of HVDC Systems and Power Electronics for Transmission Systems, Chaired by Dr. Ram Adapa. WG15.05.08 HVDC and FACTS Economics and Operating Strategy. Mark Reynolds is the Chairperson WG 15.05.14 HVDC and FACTS Devices Education, Chaired by Brian Johnson. WG 15.05.15 – Use of Power Electronics in Major Grid for Generation Requirements, Chaired by Geza Joos. A new Subcommittee was formed by the T&D committee titled “Integration of Renewable Energy into Transmission and Distribution Systems.” WG 15.05.15 is to be integrated into the new Subcommittee. WG 15.05.17 HVDC and FACTS Bibliography, chaired by Rajiv Varma. Significant progress has been made in updating this Bibliography. The HVDC Projects listing with new and proposed projects is readily up-to-date and is available to CIGRE B4. It was proposed that this list be on the Subcommittee website and that a link to the CIGRE B4 Compendium website page be established with B4’s permission. The next meeting of the HVDC and FACTS subcommittee is scheduled in January, 2008. Dennis Woodford IEEE Liaison

22F/143/DC For IEC use only 2007-07-13

INTERNATIONAL ELECTROTECHNICAL COMMISSION

TECHNICAL COMMITTEE No. 22:Power electronic systems and equipment SUB-COMMITTEE 22F: Power electronics for electrical transmission and distribution systems Technical policy of IEC SC 22F secretariat

--------------- The technical policy of SC 22F secretariat is determined by the present condition and development of power electronics for electric power systems. The application of power electronics components and systems allows to solve practically all problems of electric power systems which cannot be solved or can be solved rather expensively by traditional means. In principle the use of power electronics allow to transform any electric power system into a practically invulnerable, reliable, economic and effective one. It results in a fast development, reduction of prices and practically unlimited demand for the equipment of power electronics for electric power industry, and it makes the activity of SC 22F very important. The basic elements of high-voltage converters and other devices of power electronics for electric power systems are valves consisting of many power semiconductor devices (thyristors, IGBTs, etc) and control/protection systems of power electronics objects. All these elements are included into the scope of SC 22F. However there are no proposals and projects on control, protection and monitoring systems in the Program of Work of SC 22F and on the opinion of SC 22F secretariat high-voltage valves are not fully described by IEC standards. Only two International Standards on testing of thyristor valves for HVDC systems and static VAR compensators have been developed by SC 22F. The IEC supports two main principles:

- all products should be fully described by the IEC International Standards to ensure common specifications for all interested sides at the world market and interchangeability of products manufactured by different enterprises.

- any set of product International Standards should ensure the possibility for all manufacturers in any

country to produce and sell the product meeting the requirements of the International Standards at the world market to prevent monopolistic limitations.

According to the IEC practice any kind of electric or electronic equipment is described by several International Standards, the basic ones are:

1. Terms and definitions 2. Ratings (limiting values) and characteristics 3. Test methods (for ratings) 4. Measurement methods (for characteristics).

In addition standards for dimensions, protection against radio interference and audio noises, preservation of the environment, safety, etc. are usually developed if necessary. The absence of the complete set of standards on the main converter equipment (valves and control/protection systems) makes impossible to sell them at the world market.

2 22F/143/DC

The difficulty is in the fact that delegates of some IEC National Committees represent not only national interests but the interests of their companies as well and they are interested in the preservation of the present situation. They insisted that such complex installations like HVDC systems can be delivered only "on a turn-key basis" and therefore complete set of international standards for any equipment which is a component of a HVDC system, e.g. for valves, are not necessary. However, other equipment of converter substations (transformers, reactors, capacitors, switches, etc.) is practically fully described by complete sets of IEC standards and it can separately be on sale. The projects of power electronics installations (HVDC transmission line and back-to-back installations, static reactive power compensators, etc), cease to be individual. The universal blocks developed earlier (modules of HVDC valves, control systems, cooling systems, capacitor banks, etc.) are used as “bricks” for the design and construction of installations with the necessary parameters. At present the manufacturers of many countries could produce and sell separately high quality high-voltage converter equipment if the complete set of IEC standards existed but the absence of this set of standards prevents them to do it. Moreover such a situation prevents users, e.g. utilities, to chose and construct HVDC installations with necessary ratings using separate blocks produced by different manufacturers, e.g. by economic reasons, in spite of the fact that level of electrical engineering knowledge on high-voltage power electronics in many countries is high enough to do that. Therefore on SC 22F secretary’s opinion the technical policy of SC 22F should consist in ensuring the development of complete set of standards for basic elements of converter and switching equipment as it stated in the scope of SC 22F and in expanding as much as possible the complex standardization of all kinds of products of power electronics and first of all valves and control/protection systems. Taking into account the situation described above the IEC National Committees are kindly requested to comment on the technical policy proposed by SC 22F secretariat and to make new work item proposals to develop complete sets of international standards for basic converter and switching equipment, i.e. valves and control/protection systems using the IEC Electronic Voting System by

2007-09-07.

22F/146/INF For IEC use only 2007-09-21

INTERNATIONAL ELECTROTECHNICAL COMMISSION

TECHNICAL COMMITTEE No. 22: Power electronic systems and equipment SUB-COMMITTEE 22F: Power electronics for electrical transmission and distribution systems Compilation of comments on document 22F/143/DC “Technical policy of IEC SC 22F secretariat”

In document 22F/143/DC the technical policy proposed by IEC SC 22F secretary for SC22F was

formulated and the necessity of its adoption was explained. SC 22F P-members were requested to comment on the technical policy proposed by SC 22F secretary and to make new work item proposals to develop complete sets of international standards for basic converter and switching equipment, i.e. valves and control/protection systems.

The compilation of the comments received from IEC National Committees of Germany, Japan, Russia and Sweden with the observations of SC 22F secretariat is given in Annex.

2 22F/146/INF

Report of Comments on DC - Document 22F/143/DC Technical policy of IEC SC 22F secretariat Circulation Date: 2007-07-13 Closing Date: 2007-09-07

Country Status Received CommentsAustralia O - - Austria P - - Belgium O - - Bulgaria O - - Canada O - - China P - - Croatia O - - Czech Republic O - - Denmark O - - Finland O - - France P 2007-09-06 N Germany P 2007-08-27 Y Hungary O - - India P 2007-09-03 N Italy P 2007-09-06 N Japan P 2007-09-07 Y Korea (Rep. of) P - - Malaysia O - - Netherlands O - - New Zealand O - - Norway O - - Poland O - - Portugal P - - Romania O - - Russian Fed. P 2007-08-31 Y Serbia O - - Singapore O - - Spain P 2007-09-05 N Sweden P 2007-08-30 Y Switzerland P - - Ukraine O - - United Kingdom P 2007-08-22 N

P-members O-members Total Y : comment received 4 0 4 N : no comments 5 0 5 - : no response 5 18 23 P-members with no response: Austria, China, Korea (Rep. of), Portugal, Switzerland

3 22F/146/INF

FORM-COMMENTS (IEC) 2007-03-07

Annex Date Document 2007-08-21 22F/143/DC

National

Committee Line

number Clause/

SubclauseParagraph

Figure/ Table

Type of comment

(General/ Technical/ Editorial)

COMMENTS Proposed change OBSERVATIONS OF THE SECRETARIAT on each comment submitted

DE

General German IEC National Committee votes against the Technical Policy proposed by IEC 22F Secretary dated July 13, 2007 with following explanations: We do not share the view of 22F Secretary on the current situation of IEC standards for HVDC and FACTS applications. We consider the actions and intentions proposed by 22F Secretary does not promote the technology development in this field and provides no real benefits to the users of such technology.

General remark: The proposed Technical Policy refers to any system and equipment listed in the scope of IEC SC 22F and having long-term positive operation experience. High-voltage thyristor valves and control systems for HVDC installations mentioned below are covered by the scope of SC 22F and are chosen by the SC 22F secretary as the best examples of the lack of IEC International Standards in the field of power electronics in electrical transmission and distribution systems. On the contrary the secretary’s proposals will promote the technology development in the field by giving the opportunity to many designers and manufacturers in various countries to produce and sell main equipment for electronic power conversion and semiconductor switching equipment such as valves, power semiconductor switches, control systems, etc, at the world market like any other converter/switching equipment covered by IEC International Standards. Efforts of designers and manufacturers of many companies interested in selling these products at the world market can give better results in the technology development. From the other hand users will get the opportunity to choose due to some technical or economic reasons whether to order the whole

4 22F/146/INF


National Committee

Line number

Clause/ Subclause

Paragraph Figure/ Table

Type of comment



DE

The Technical Policy of 22F Secretary can be concluded in following major statements:

1. There are no sufficient IEC standards for high voltage valves and control & protections systems for power electronic systems.

2. The rating and characteristics of main converter equipment shall be standardized in order to be able to sell them on the market, to be interchangeable and to prevent monopoly.

3. Without a complete set of standards for all main equipment neither manufacturer can sell individual equipment, nor can the users buy equipment from different suppliers to build a power converter system.

4. Therefore all basic elements of converters, particularly converter valves and control & protection system, shall be standardized by a complete set of standards.

HVDC or FACTS systems on “turn-key” base from a single supplier or to buy all necessary kinds of equipment (e.g. high-voltage thyristor valves for HVDC converters) from different manufacturers, to design and build HVDC/FACTS systems by themselves. To implement these both opportunities all kinds of equipment especially basic conversion equipment like valves and control systems should be fully covered by IEC International Standards. In general it is a correct representation of the SC 22F Technical Policy proposed by the secretary. The secretary did not propose any numerical values of parameters but the description of a set of essential ratings and characteristics under specified conditions.

5 22F/146/INF


National Committee

Line number

Clause/ Subclause


Type of comment



DE DE

We carefully assessed the development and current status in this field and come to a conclusion completely different than the opinion of 22F Secretary. High-Voltage DC transmission (HVDC) is the most relevant equipment and system and represents the scope of IEC 22F in this regard. Existing IEC Standards Today there are already several IEC standards and publications available for high voltage converter systems (HVDC and FACTS). Following list shows the relevant documents for HVDC as an example:

• IEC 60633, Terminology for high voltage direct current (HVDC) transmission

• IEC 60071-5 Insulation co-ordination –Part 5: Procedures for high-voltage direct current (HVDC) converter stations

• IEC 60919-1 Performance of high-

voltage direct current (HVDC)systems –Part 1: Steady-state conditions

• IEC 60919-2 Performance of high-voltage direct current (HVDC)systems –Part 2: Faults and switching

• IEC 60919-3 Performance of high-voltage direct current (HVDC) systems – Part 3: Dynamic conditions

Under revision. It is an terminology standard for a whole HVDV system but not for its equipment. There is no international standard on terms and definitions for thyristor valves of HVDC systems with line commutated converters and their control systems. This is International Standard for converter stations but not for its equipment such as valves or control systems. Publication IEC 60919 (Parts 1-3) “Performance of high-voltage direct current (HVDC) systems with line commutated converters” (at present it is under revision) is not an IEC International Standard but Technical Report published mainly for educational purpose and has no International Standard compulsory features.

6 22F/146/INF


National Committee

Line number

Clause/ Subclause


Type of comment



DE

• IEC 60700-1 Thyristor values for high voltage direct current (HVDC) power transmission –Part 1: Electrical testing

• IEC 61803 Determination of power

losses in high-voltage direct current (HVDC) converter stations

• IEC 62199 Bushings for d.c. application

• IEC 62001 Guide to the specification and design evaluation of a.c. filters for HVDC systems

• IEC 61975 System tests for high-voltage direct current (HVDC) installations

Under revision. It is the only IEC International Standard concerning HVDC valves for HVDC systems with line-commutated converters. IEC 61803 is a very important and useful International Standard. However it covers only one (i.e. Power losses measurement) of many necessary Measurement methods of characteristics of HVDC thyristor valves for line commutated converters. This is International Standard for components of converter stations (bushings) but not for equipment of HVDC converters such as valves or control systems. At present it is not an IEC Standard but IEC Publicly Available Specification (PAS) based on CIGRE Brochure No. 139. This PAS is published mainly for educational and explanatory purposes and has no Standard compulsory features. It is so-called pre-standard. SC 22F WG 18 has been organized to develop an IEC Standard on its base but WG 18 has not begun its work yet (WG 18 Working draft is planned in April 2008). Besides this PAS Publication concerns equipment of converter stations (a.c. filters) but not valves or control systems as equipment of HVDC converters. It is also not an IEC Standard but IEC Publicly Available Specification (PAS) based on CIGRE Brochure No. 97, published mainly for educational and explanatory purposes and

7 22F/146/INF


National Committee

Line number

Clause/ Subclause


Type of comment



DE

• IEC 61378-2 Converter transformers – Part 2:Transformers for HVDC applications

It is obvious that all major equipment and characteristics of HVDC system is well covered by the existing IEC standards. On-going regular maintenance work on the IEC standards will ensure that the technical new development can be integrated.

having no Standard compulsory features. SC 22F WG 17 has been organized to develop an IEC Standard on its base but WG 17 has not begun its work yet (WG 17 Working draft is planned in April 2008). Besides this PAS Publication concerns system tests of whole converter stations but not such equipment of HVDC converters as valves or control systems. This International Standard does not concern basic equipment of HVDC converters such as valves or control systems. Not agreed. Taking into account that IEC Technical Reports and Publicly Available Specifications listed above have no Standard compulsory features and cannot be used as Standards i.e. as thoroughly developed, formulated and internationally adopted compulsory set of specifications used for tenders, contracts, etc, it is obvious that IEC Publications listed above do not sufficiently cover both converter stations and most of their equipment. The basic elements of high-voltage converters and other devices of power electronics for electric power systems are valves consisting of many power semiconductor devices (thyristors, IGBTs – insulated gate bipolar transistors – etc). The second basic elements are control systems of power electronics objects and both these elements are included into the scope of SC 22F. Both valves and controls for HVDC converters are not fully covered by IEC International

8 22F/146/INF


National Committee

Line number

Clause/ Subclause


Type of comment



DE

Standard Rating and Characteristics Since its introduction in 70’s of last century HVDC has experienced a continuous development together with the evolution of power electronic technology. HVDC system has been successfully implemented in the AC power system world wide as controllable interconnections. In spite of extra costs of power converters HVDC provides the unique feature to be tailor-made and optimized for specific requirements at the interconnecting points in the AC network. This is one of major advantages which justify the implementation of HVDC system at user’s business planning. As HVDC system has been and will remain as a supplementary power transmission link in the existing AC power system, they are needed to

Standards. So there is only one Standard mentioned above (IEC 60700-1) which covers electrical testing of high-voltage thyristor valves for HVDC systems and no other standards. Similarly there is only one IEC Standard developed by SC 22F (IEC 61954) covering testing of thyristor valves for static VAR compensators and no other standards. The role of HVDC and power electronics in electrical systems is much more important than it is mentioned in the comment. Further development of electric power industry in the world is impossible without a wide application of power electronics which is a real technical revolution in electric power industry. The use of microelectronic control/protection devices and semiconductor power valves/switches with their very high operation speed can solve all the problems of power systems which cannot be solved by traditional means. In principle power electronics allow to transform any electric power system into a practically invulnerable, reliable, economic and effective one and eventually all power systems of the world can become such due to the wide application of power electronics. It will result in a fast development, reduction of prices and practically unlimited demand for the equipment of power electronics for electric power industry and therefore the activity of IEC SC 22F becomes very important. As a matter of fact all HVAC power transmissions are also designed and optimized individually to meet the specific user’s need. It is

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be designed and optimized individually to meet the specific user’s need. Indeed among 100 HVDC schemes worldwide there are hardly any schemes using equipment of same design and characteristics. The interchangeability of HVDC equipment is therefore not needed, as they are not mass-product. Technically the user can always specify the equipment with same parameters to get

really practically impossible to find two HVAC transmission systems having equipment at substations exactly of the same design and characteristics. In spite of this every kind of the substation equipment has been fully covered by the corresponding IEC Standards. Due to this there are many manufacturers of various equipment and the user can easily compare and estimate equipment produced by different manufacturers, choose and buy what he wants. Similarly low-voltage converters are designed and optimized for any of many applications by comparing thyristors made by different suppliers and fully described by IEC Standards and choosing ones with the necessary essential ratings and characteristics. The projects of power electronics installations (HVDC power transmissions and back-to-back installations, static reactive power compensators, etc), cease to be individual. The universal blocks developed earlier (modules of HVDC valves, control systems, cooling systems, capacitor banks, etc.) are used as “bricks” for the design and construction of installations with the necessary parameters. For instance high-voltage thyristor valves for HVDC application can be considered as mass-production equipment as several thousands valves were designed and manufactured for over 100 HVDC projects. The interchangeability of HVDC equipment is needed to make the replacement of equipment easy for users. It can be easily provided if the full set of IEC Standards covering the

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interchangeable equipment if they wish so. A standard rating and characteristic by IEC is neither technically reasonable nor in interest of HVDC users. Consequently this will reduce the attractiveness of HVDC technology and prevents its further development to meet user’s specific needs. During last decades there have been always several HVDC suppliers on the market, although there were no st. A monopolistic supplier situation has never exist and it does not seem to change in future.

equipment exist especially a standard on essential ratings and characteristics. In this case there is no need for a user to invent a full content of the specification, he can take ready specification in the form of internationally adopted IEC Standard and add the necessary changes. The secretary did not propose any numerical values of essential ratings and characteristics of thyristor valves for HVDC converters but only a set of essential ratings and characteristics under specified conditions. They will completely describe all the features of the valve, make the comparison and estimation of valves easy for users and will not prevent the further development of valves to meet user’s specific needs. Two leading transnational corporations supplied (mostly on “turn-key” base) practically all HVDC and FACTS converter equipment for a hundred projects during last 40 years to many countries of the world besides USSR/Russia and Japan where such projects were realized by their own companies. Therefore the sentence in the German comment “A monopolistic supplier situation has never existed …” seems to be too strong at least as concerned the conversion equipment and the rest of the sentence “… and it does not seem to change in future” is rather unconvincing.

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HVDC Equipment from different Suppliers According to our knowledge there are several HVDC schemes using equipment from different suppliers. It has been always up to the users if they wish to implement their project on “turn-key” base or on “purchase equipment individually” base. The recent projects in China are the best example that users can nowadays purchase main equipment from different HVDC suppliers and integrate into a HVDC system. The recent references are for example:

• Gezhouba – Shanghai HVDC Project • Three Gorges – Changzhou HVDC

Project • Lingbao BtB HVDC Project • Gaoling BtB HVDC Project

Another good example is the fact of successful upgrade / refurbishment of various existing HVDC schemes by suppliers different than the original manufacturers, e.g. Konti-Skan, Nelson River Bipole I Valve Replacement, Pacific-Intertie Valve Replacement at Celilo Station, refurbishment of valves and control&protection system at Cabora-Bassa Appollo Station. Even refurbishment of valves with thyristors from a different manufacturer was done successfully in Madawaska and Miles City converter stations. These facts show that it has always been possible to integrate equipment from different suppliers into a HVDC system.

Yes, there are several HVDC schemes using equipment from outside suppliers. However in all cases outside companies supplied to new HVDC systems not converter equipment such as valves or control systems (which are the objects of the discussion) but converter transformers, reactors, capacitors, cables, etc, i.e. kinds of equipment fully covered by existing IEC Standarts. It is only supports the secretary’s thesis that it is impossible for outside companies to supply converter equipment to new HVDC projects due to the absence of necessary IEC Standards. In all cases of the valve replacements new valves were manufactured by one of two corporations mentioned above using its own specifications. If the full set of IEC Standards on valves exist these valves could be manufactured and supplied by other independent suppliers. As to the refurbishment of valves with thyristors from a different manufacturer it became possible only due to the fact that power thyristors were fully covered by IEC Standards and therefore the experts could compare thyrisrors produced by many different manufacturers, estimate them and choose the best ones for their purpose.

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Need of More Standards The standardization of technology shall consider both market need and status of technology development. In the power industry HVDC and FACTS are considered as new technology, which are still under further development. Over decades HVDC schemes have been designed, built and operated even without any relevant IEC standards. Many Cigre Reports have been proven as suitable design guides during this time period. During last 30 years IEC standards and reports on HVDC technology have been introduced step by step. The fact, that IEC documentations focus on the standardization of testing criteria, testing procedure and functional description for HVDC system, has been widely considered as a “golden” midway. It offers both users and manufacturers the possibility to determine the product quality based on the same criteria, while the design of individual equipment or subsystem can be freely optimized to utilize the newest technology available. For the converter valves and control & protections system, existing IEC and Cigre documents are already sufficient to serve the purposes at users and supplier side. Introducing of more IEC standards to regulate detailed design on component level is rather harmful for the technology development, but brings no real benefits to the user. Therefore it is recommended to maintain the existing technical policy of IEC 22F.

Factually HVDC and FACTS technology using thyristor valves in 12-pulse converters is already not new. All technical solutions used for HVDC high-voltage thyristor valves from the 70th till present time are practically the same, considerable operation experience has been accumulated. Basic converter equipment such as high-voltage thyristor valves has been successfully used for a long time and will be used in future. It is not clear from the considered comment what international bodies or organizations consider the standardization of testing criteria, testing procedure and functional description for HVDC system quite sufficient and “as a “golden” midway”. Reading the comment it is also very difficult to understand what was the reason for SC 22F to work at all on the development of many IEC Standards based on CIGRE Reports when these reports themselves “are already sufficient to serve the purposes at users and supplier side”. According to the IEC principles any kind of electrical or electronic equipment included in IEC TC/SC scopes should be covered by a set of IEC International Standards, the basic ones are: 1. A standard containing thoroughly formulated terms and definitions (together with letter symbols) describing a product, its parts and components, operation modes, etc, and ensuring a common technical language for experts on the international level. The absence of such a standard results in the inability to fully

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understand basic features of the product not only by experts in the field on the international level but even by specialists of the same company. It is impossible to design, manufacture and advertise the product at the market without such a standard or specification. 2. A standard stating essential ratings (e.g. limiting values of voltages, currents, temperatures, frequency, etc) and characteristics (operating features of the product such as operating voltages and currents, operation times, temperatures, cooling method, etc) at specified conditions. It is also impossible for suppliers to design, manufacture and advertise the product at the market and for users to compare, estimate, choose and buy equipment produced by different manufacturers if there is no such a standard. 3. A standard stating test methods internationally agreed by manufacturers and users to confirm essential ratings of the product. 4. A standard stating methods of measurement of the product characteristics internationally adopted by manufacturers and users and ensuring the necessary accuracy and reliability of measurement results. In addition standards for dimensions, protection against radio interference and audio noises, preservation of the environment, safety, etc. are usually necessary both for manufacturers and users. Any product can be designed, manufactured by an interested supplier and sold at the world market as well as be compared, estimated, chosen and bought by an interested user only if

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all necessary IEC Standards mentioned above exist. No CIGRE Report, IEC Technical Report or Publicly Available Specification can replace the IEC International Standard in this respect, otherwise all the IEC activity becomes senseless. It should be noted that at present all companies producing and supplying power electronic equipment for electrical systems must have their own standards or specifications similar to listed ones above. They would not be able to design and manufacture this equipment without such specifications. The recommendation of the German IEC National Committee written in the last part of its comment “to maintain the existing technical policy of IEC 22F” is especially advantageous only for two existing transnational corporations but not for possible manufacturers of converter equipment from the USA, Canada, China, India, Russia and other countries which are able to produce such equipment and sell it freely at the world market. This recommendation does not take into account the interests of users in many countries who have mastered the proved technology of the design and construction of HVDC systems and FACTS devices and may wish to compare, estimate, choose and buy separate kinds of converter equipment (e.g. valves and controls) from different suppliers. SC 22F secretary proposes to begin at first with the development of the following IEC Standards for high-voltage thyristor valves of line-commutated converters for HVDC systems:

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Of course new standards or technical reports shall be issued by IEC 22F also in the future if new technology has been established on the market. But this is also the traditional practice of 22F. A good example is the newly established IEC Working Group in 22F to work out the testing standards for VSC-based converters.

1. A standard on terms, definitions and letter symbols. 2. A standard on essential ratings (limiting values) and characteristics. 3. A standard on measurement methods of characteristics. These IEC Standards can be easily developed at SC 22F either on the base of existing specifications developed at one of the leading companies producing high-voltage thyristor valves for HVDC application or on the base of IEC 60747-6 “Semiconductor devices – Part 6: Thyristors” developed by IEC TC 47. IEC Standard on testing high-voltage thyristor valves for HVDC applications (IEC 60700-1) has been already developed by SC 22F. This is quite unsuccessful example. The application of Voltage Sourced Converters in HVDC systems is quite new and promising technology. However there is only one supplier of VSC-based converters for HVDC applications in the world and these installations have very small operation experience comparing with classic HVDC thyristor converters. Both these factors are considered in the IEC as unfavorable for the development of a new Standard. Therefore it was decided at the last SC 22F meeting in 2004 to request CIGRE Study Committee B4 (the liaison of SC 22F) to form a new Working Group and develop a CIGRE Report on testing valves for HVDC systems with VSC-based converters as a scientific base for a new IEC Standard. The agreement with CIGRE SC B4 was achieved by

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SC 22F secretary in 2005 and such Working Group CIGRE B4-48 was formed in September 2006. However at this time a representative of the Swedish National Commission requested to exclude valve testing problem from the scope of B4-48. CIGRE SC B4 did not agree with that. In several months the Swedish IEC National Committee made a proposal to develop the IEC Standard on testing valves for HVDC systems with VSC-based converters not waiting for the results of CIGRE B4-48 work. IEC SC 22F Working Group 15 was organized (convenor Dr. B. Sheng, ABB) and the first Working Draft was prepared. However CIGRE B4-48 Report will be ready by the end of SC 22F WG15 work and if there is a marked difference between the results we shall have to begin the revision of the newly developed IEC Standard.

JP 1. Main points of document we understand There is no complete set of standards especially for the valve and control and protection equipment which are unique in HVDC and this is the reason why the number of manufacturers of HVDC equipment is small. Also this is the reason why HVDC utilities tend to choose a supplier on full turn key basis. 2. Experiences in Japan Last 15 years, 6 HVDC projects were put into service in Japan. Main components such as valves, transformers and dc reactors were basically ordered separately by utilities but not on full turn key basis. Because valves and control and protection equipment have a very strong relation, they were ordered to one manufacturer.

1. In general it is a correct representation of the SC 22F Technical Policy proposed by the secretary. However valves and control/protection equipment for classic HVDC schemes are not unique at present due to a big number of such installations in the world and considerable operation experience. 2. As far as the secretary knows the converter parts of each HVDC project in Japan was designed and constructed jointly by Japanese companies Toshiba, Hitachi and Mitsubishi approximately in even shares. It is assumed that there was some kind of an agreement between them and that there were some common specifications for conversion equipment. In this case IEC Standards were not

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We do not feel that lack of complete set of HVDC standards leads to the trend of full turn key base business.

needed for installations inside Japan but they are necessary to ensure a free trade at the world market.

JP 3. Standardisation of valve design The design of valves is strongly dependent on the following. a) temporary overvoltage on the ac side b) ratings of thyristor used c) ambient temperature at the site These items are really project dependent and we can not expect many merits even if we have a standard of the valve design. 4. Standardisation of control, protection and monitoring equipment. IEC 60919 series well describe the requirements and how to specify control, protection and monitoring equipment. Then we do not feel any needs of further standard on this equipment. 5. From manufacturers point of view HVDC business is attractive because the project is big and manufacturers can demonstrate the advanced technology and reliable production ability. However HVDC business is at random and steady production can not be expected. The components used in HVDC valve are high voltage rating and not standard components. The valve size is big and wide space is required for assembly. Furthermore testing of the valve and valve sections require additional test facilities. These are the main reasons why the number of HVDC manufacturers does not increase recently.

3. Agreed. However SC 22F secretary did not propose to standardize valve design because it can limit the freedom of design. Only additional IEC Standards on terminology, essential rating and characteristics and on measurement methods of characteristics under specified conditions are proposed to ensure a full description of all the features of a concrete thyristor valve. 4. Publication IEC 60919 is not an IEC International Standard but Technical Report published mainly for educational purpose and has no IEC International Standard compulsory features. IEC 60919 is some kind of a text-book but an IEC Standard is some kind of a law ensuring the quality of products at the international market. 5. HVDC business is attractive because the wide application of power electronics in electrical systems will allow to transform any electric power system into a practically invulnerable, reliable, economic and effective one. It will result in a fast development, reduction of prices and practically unlimited demand for the equipment of power electronics for electric power industry

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6. Last remark We agree that there are no complete set of IEC standards for valve or control and protection panel for HVDC but we do not feel the need of new standards of these equipment for classic HVDC systems.

The secretary’s proposal to develop a full set of IEC Standards attempts to ensure even opportunities for all manufacturers able to produce, test and sell a quality converter equipment (e.g. thyristor valves) at the international market. There are many such companies in many countries but without internationally adopted IEC Standards it is practically impossible to design and manufacture thyristor valves which could be surely sold at the international market. There are also many utilities in the world having sufficient technical background to design and construct large HVDC installations. Due to some economical, technical or other reasons these utilities are ready to buy converter equipment from independent manufacturers but without internationally adopted IEC Standards they have to buy it from a limited number of suppliers.

RU

General The Russian National Committee in general agrees with the Technical policy of SC 22F proposed by the secretary of SC 22F but proposes to formulate it in shorter and clearer terms.

1. The full description of all products listed in SC 22F scope by the set of IEC International Standards such as: - Terms and definitions; - Ratings (limiting values) and characteristics; - Test methods (for ratings)

Agreed. However it was difficult to make 22F/143/DC shorter as the explanation of the necessity of the proposed Technical Policy was necessary.

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RU General - Measurement methods (for characteristics), etc, to ensure common specifications for allinterested sides at the world market and interchangeability of products manufactured by different enterprises. 2. The ensuring of the possibility for all manufacturers in any country to produce and sell the product meeting the requirements of the International Standards at the world market to prevent monopolistic limitations.

SE General remark: The SC 22F secretary’s proposal on the desirable technical policy of SC 22F is factually formulated in the last paragraph of 22F/143/DC. The rest text of this document is the explanation of the necessity such a technical policy. Most comments of the Swedish IEC National Committee refer to the explanation part of this document and are aimed to neutralize it and to cross out the necessity of the proposed technical policy of SC 22F.

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SE Third sentence of third

paragraph of page 1

Technical The sentence beginning “However there are …” and ending “…and on the opinion of SC22F secretariat ….” is as stated an opinion and can therefore not be part of a Technical Policy.

Eliminate entirely the third sentence of the third paragraph.

Not agreed. This sentence explains the necessity of the technical policy proposed by the secretary but not formulates it.

SE Fourth sentence of third

paragraph of page 1

Technical The sentence beginning “Only two International Standards …” is meretive without justification. Practise has shown that these two stanadards fully meet the need of standards on testing of these devices.

Eliminate the word “Only”, starting the fourth sentence (now becoming the third sentence) of the third paragraph “Two ..…”.

The sentence can be change in the following way: “Two International Standards on testing of thyristor valves for HVDC systems and static VAR compensators have been developed by SC 22F. Practise has shown that these two standards fully meet the need of standards on testing of these devices but they cannot fully describe all their features”.

SE Last sentence of page 1

Technical The sentence beginning “The absence of the complete set of standards ..” is misleading. There are a lot of recent examples when users have bought different packages for HVDC schemes from different suppliers, including controls and valves.

Change to “The fact that standards of the main equipment for all different applications within the T & D segment have not yet been developed, suggests that development of further standards may promote the marketing of the different power electronic applications within the T & D segment.”

Not agreed. Really a lot of examples are known when users have bought various equipment for HVDC schemes from different suppliers, including controls and valves. However the valves and controls were bought from a limited number of existing suppliers, and the sentence implies that other possible suppliers of such equipment cannot be sure that they will be able to sell it if the complete sets of IEC standards are absent.

SE First pagraph of page 2

Technical The paragraph beginning “The difficulty is in fact that delegates…...” is misleading. The participation of all IEC delegates are paid by their respective organizations. This is valid not only for manufacturers but also for example

Eliminate the entire paragraph.

The paragraph can be replaced by the sentence:

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SE Technical users, testing institutes, consultants and research institutes. It is not the manufacturers but the owners who decide whether they want to purchase the HVDC schemes on a turn-key basis or in different packages. The paragraph does not add anything essential to the Technical Policy.

“The difficulty is in fact that some representatives of the existing suppliers of the main converter equipment (valves and controls) are interested in the preservation of the present situation”. This sentence is also a part of explanatory notes.

SE 1st sentence

of 9th paragraph

Second pagraph of page 2

Technical The conditioning in the first sentence beginning “However, other equipment…...” is misleading. The paragraph does not add anything essential to the Technical Policy.

Change the beginning of the first sentence of that paragraph to “Several equipment of converter stations (transformers,…. “, and the end of the sentence to “..and can separately be on sale.”

The paragraph can be replaced by the sentence: “Some equipment of converter stations (transformers, reactors, capacitors, switches, etc, but not valves and control/protection systems) is practically fully described by complete sets of IEC standards and it can separately be on sale”.

SE 2nd and 3rd

sentence of the 9th

paragraph

Second paragraph of page 2

Technical The 2nd and 3rd sentences of that paragraph beginning “The projects of HVDC and SVC installations..” and “The universal blocks developed earlier…” are redundant, not up to date and too restrictive considering the scope of SC22F.

Eliminate entirely these two sentences to avoid possible confusion in the Technical Policy.

Agreed.

SE The 1st sentence

of 10th paragraph

Third paragraph of page 2

Technical The first sentence beginning “At present the manufacturer of many countries could produce ..” does not fully reflect present practises. Many recent HVDC schemes have been and are being purchased in different packages from different manufacturers.

Change to “The manufacturers of many countries may sell and market separately the equipment for a vast spectra of power electronic applications

Agreed with the proposed text but with the condition to add the following sentence: “However most of conversion equipment supplied separately to users were produced by a limited number of existing manufacturers but not independent suppliers due to the absence of the necessary IEC Standards”.

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within the T & D segment thanks to the many IEC equipment standards that havebeen developed.”

SE 2nd and 3rd

sentence of 10th

paragraph.

Third paragraph of page 2

Technical The second sentence beginning “Moreover such situation …” does not fully reflect present practises. There are a lot of recent examples when users have bought different packages for HVDC schemes from different suppliers, for example controls and valves.

Change the beginning “Moreover such situation prevents users, e.g. utilities …” to “This enables the users …” continuing “…to chose and construct power electronic installations within the scope of SC22F using blocks produced by different manufacturers.” Full stop after that.

Not agreed. The proposed change makes the meaning of the sentence completely contrary to the initial one.

SE Fourth paragraph of page 2

Technical The sentence “Therefore on SC22F sectretary’s opinion …” is clearly an opinion and can as such not be part of a Technical Policy.

Eliminate entirely this paragraph.

Not agreed. Only words “on SC 22F secretary’s opinion” can be deleted but not the content of the proposed technical policy.

SE Fifth paragraph of page 2

Technical The sentence “Taking into account the situation described …” is unclear and we assume that it is not expected to be part of a Technical Policy.

Eliminate entirely this paragraph.

Not agreed. Only words “Taking into account the situation described above...” can be deleted.

FORM COMMENTS (IEC)2007-03-07

Chairman: Dr. Ruifeng GOU, People’s Republic of China

Secretary: Mr. Lev TRAVIN, Russian Ffederation

1. IEC 60633, Ed. 2, ”Terminology for high-voltage direct current (HVDC) transmission”

Maintenance Team 13

Convenor: Mr. Colin Davidson, UK

Maintenance Cycle Report (February 2007) - target dates of the maintenance stages:

COMMITTEE DRAFT FOR COMMENTS 2007-09-30

COMMITTEE DRAFT FOR VOTING 2008-09-30

FINAL DRAFT FOR VOTING 2009-09-30

INTERNATIONAL STANDARD 2009-12-30

MT 13 began the work in February 2007

MT13 Working Draft - June 2007

Committee Draft 22F/140/CD – July 2007

Compilation of comments – October 2007 - for discussion at SC 22F meeting in Paris, 2007.

3. IEC 60919, (Technical Report), Ed. 2 "Performance of high-voltage direct current (HVDC) systems with line commutated converters".

The first part of this publication IEC 60919-1, (Technical Report), Ed. 2 "Performance of high-voltage direct current (HVDC) systems with line commutated converters – Part 1: Steady-state conditions" was reviewed by MT 9 and published as an IEC Technical Report in March 2005 with the Maintenance Result Date: 2009.

Second part of IEC 60919-2, Ed. 2 "Performance of high-voltage direct current (HVDC) systems with line commutated converters – Part 2: Faults and switching"

Maintenance Team 11

Convenor: Mr. Wanrong ZHANG, China

Maintenance Cycle Report (December 2006) - target dates of the maintenance stages:



PUBLICATION OF TECHNICAL REPORT 2008-12-31

MT 11 beginning the work – February 2007

MT 11 Working Draft - June 2007

Committee Draft – July 2007


4. IEC 61803, Ed. 1: 1999, “Determination of power losses in high-voltage direct current (HVDC) converter stations”

Maintenance Team 14

Convenor - Mr. Thomas Westerweller, Germany

Maintenance Cycle Report:





MT 14 will begin to work in January 2008.

5. IEC 61954, Ed. 1:1999, Testing of thyristor valves for static VAR compensators

Maintenance Team 10

Convenor is Mr. Bjorn Thorvaldsson, Sweden

The review date for IEC 61954, Ed. 1:1999, is 2007-12-30 and the Maintenance result date is 2010-04.MT 10 will begin its work in December 2007.

6. IEC 61973, Ed. 1 "High voltage direct current (HVDC) substation audible noise". (based on the CIGRE WG B4.26 Report)

Working Group 12

Convenor is Mr. Chan-Ki KIM, Republic of Korea

The IEC Standardization Management Board (SMB) decision on the development of IEC 61973, Ed.1:





WG12 Working Draft - July 2007

Committee Draft - July, 2007

Compilation of comments – November 2007.

COMMITTEE DRAFT FOR COMMENTS

COMMITTEE DRAFT FOR

VOTING

FINAL DRAFT FOR VOTING

INTERNATIONAL STANDARD

2008-04-30 2009-03-31 2009-12-30 2010-03-30

7. IEC/PAS 61975, Ed. 1, "System tests for high-voltage direct current (HVDC) installations"

(based on CIGRE Brochure No. 97)

Working Group 17

Convenor Mr. Mingxin WANG, Peoples Republic of China

IEC/PAS 61975, Ed. 1, was published in August 2004 as a Pre-Standard.

Maintenance Cycle Report

WG 17 should begin its work in November – December 2007.


COMMITTEE DRAFT FOR VOTING



2008-04-30 2009-03-31 2009-12-30 2010-03-30

8. IEC/PAS 62001 Ed. 1 "Guide to the specification and design evaluation of AC filters for high-voltage direct current (HVDC) systems”(based on the CIGRE Brochure No. 139)

Working Group 18

Convenor Mr. Gearoid O’heidhin, United Kingdom

IEC/PAS 62001 Ed. 1, was published in July 2004 as a Pre-Standard.


WG 18 should begin its work in November – December 2007.

9. IEC/PAS 62344, Ed. 1 “General guidelines for the design of ground electrodes for high-voltage direct current (HVDC) links”

(based on CIGRE B4 WG 14-21 Guide)

IEC/PAS 62344, Ed. 1, was adopted and published in May 2007.

There is no Working Group – too few experts are nominated by IEC National Committees.

IEC/PAS 62344, Ed. 1, will be valid for 3 years. During this time SC 22F can take a decision to form

a WG for the further development of IEC/PAS 62344, Ed.1 as an International Standard, Technical Repo

or Specification.

If the WG cannot be formed due to the lack of experts the decision can be taken to withdraw the public





2007-07-31 2008-07-31 2008-12-31 2009-03-31

10. IEC 62501, Ed. 1, “Electrical testing of voltage sourced converter (VSC) valves for high-voltage direct voltage (HVDC) power transmission”.

Working Group 15

Convenor – Dr. Baoliang Sheng, Sweden


WG 15 Working Draft - July, 2007

Committee Draft - July, 2007


The secretary is of opinion that in spite of a very good work of WG15 there are two shortcomings of the project:

1. There is only one supplier of VSC-based converters for HVDC applications in the world and these Installations have verysmall operation experience comparing with classic HVDC thyristor converters. Both these factors are considered in theas unfavorable for the development of a new Standard.

2. By the request of SC22F Working Group CIGRE B4-48 was formed in September 2006 dealing with the same problemtesting Voltage Sourced Converter valves for HVDC. The corresponding CIGRE B4-48 Report will be ready by the end oSC 22F WG15 work and if there is a marked difference between the results we shall have to begin the revision of the nedeveloped IEC Standard.





2008-12-30 2009-12-30 2010-09-30 2010-12-30

11. IEC/PAS 62543, Ed.1 “High-voltage direct current (HVDC) transmission using voltage sourced converters (VSC) (based on CIGRE B4-37 Report, CIGRE Brochure No. 269)

IEC/PAS 62543, Ed. 1, was adopted in September 2007 and will be publishedin the end of 2007 as a Pre-Standard.


The following target dates of the development stages were put into the Program of Work of SC 22F:

IEC/PAS 62543, Ed. 1, will be valid for 3 years. During this time SC 22F can take a decision to form a WG for the further development of IEC/PAS 62344, Ed.1 as an International Standard, Technical Report or Specification. If the WG cannot be formed due to the lack of experts the decision can be taken to withdraw the publication.





2008-12-30 2009-12-30 2010-09-30 2010-12-30

12. IEC/PAS 62544, Ed.1 “Active filters in HVDC applications”(based on CIGRE B4 WG 14-28 Report, CIGRE Brochure No. 233)

IEC/PAS 62544, Ed. 1, was adopted in September 2007 and will be published in the end of 2007 as a Pre-Standard.


The following target dates of the development stages were put into the Program of Work of SC 22F:

IEC/PAS 62544, Ed. 1, will be valid for 3 years. During this time SC 22F can take a decision to form a WG for the further development of IEC/PAS 62344, Ed.1 as an International Standard, Technical Report or Specification. If the WG cannot be formed due to the lack of experts the decision can be taken to withdraw the publication.

13. The SC 22F secretariat has prepared document “Technical policy of IEC SC 22F

secretariat” (July 2007) stating that some basic converter equipment e.g. thyristor valves,

control systems etc, are not completely covered by IEC International Standards in spite

of the fact that they are included into the scope of SC 22F. It is proposed to begin the

development of International Standards on essential ratings and characteristics of thyristo

valves for HVDC and SVC, measurement methods for their characteristics, etc.

The compilation of comment on this document is given in document which should be

discussed at the current SC 22F meeting.

Thank you.

GOOD LUCK!

Lev V. Travin

Secretary IEC/SC 22F

October 2007

1. sc b4 agenda japan finalb4.cigre.org/content/download/2062/25742/version/3/file/report1id... ·...

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