offshore wind: grid connection & technology · pdf fileonshore station layout –...

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1 10-2011 Power Transmission SolutionsE T PS S/Re1 Power Transmission SolutionsE T PS S/Re10-2011

Offshore Wind:

Grid Connection &

Technology Options

Dietmar Retzmann


CO2 Reduction – Green EnergyMegacities – Security of Supply

Focus on

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EWEA’s 2030 Offshore Grid Vision …

PTS

No Increase in Short-Circuit Power

Power Exchange by Sea Cable

Use of Green Energy Mix

Sharing of Reserve Capacity

Benefits of Offshore DC Multiterminal:

E T PS S/Re

* as of 2009/2010

Currently existing *

Currently planned *

Under Study *

Under Study (EWEA recommended)

EWEA Recommended Grids by 2020

EWEA Recommended Grids by 2030

Source: European Wind Energy Association (EWEA) 2009/2010

350 GW2030: Up to of Wind Power !

Sharing of Reserve Capacity

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Green Energy needs Grid Enhancement … HVDC – Example of Germany

Strengthening the AC Grid with DC Overlay Grid

Source: DENA Study II Nov. 2010

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5 10-2011 Power Transmission SolutionsE T PS S/Re

33 kV AC

132 kV AC

SVC PLUS

≤ 320 kV DC

HVDC PLUS

HVDC PLUS

33 kV AC

132 kV AC33 kV AC

132 kV AC

AC Solution for Grid Access

Solutions for Grid Access: AC and DC –with SVC PLUS and HVDC PLUS

DC Solution forGrid Access


HVDC PLUS: Trans Bay Cable Project, USA


Energy Project of the Year – American Society of

Civil Engineers, Region 9; Sacramento, 9th March 2011

Energy Project of the Year – American Society of

Civil Engineers, Region 9; Sacramento, 9th March 2011

P = 400 MW

Q = +/- 170-300 MVAr

Elimination of Transmission Bottlenecks

Dynamic Voltage Support

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No Increase inShort-Circuit Power

Benefits of HVDC – in Western and Eastern-Europe …

Customer:RTE and REE

Sharing ofReserve Capacity

Power Exchange &

Customer:Energotrans Ltd.

System Data:Rating 2 x 350 MWVoltage 96 kV DCThyristor 8 kV LTT

Black Sea B2B 2013

2013

INELFE

World’s 1st VSC HVDC with 2 x 1,000 MW – each @ VDC = +/-320 kVCable: XLPE, 65 km

Increase in Stability


HVDC PLUSThe Advanced VSC HVDC

focused onGreen Energy and CO2 Reduction

Future Molding Technologies,

SVC PLUS®

The Advanced STATCOM

Innovation Meets Experience

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From Power Module to Converter: Multilevel Voltage Generation – Example of SVC PLUS

9 Power Transmission Solutions10-2011 E T PS S/Re

Power Module with DC Capacitor

v

v


Power Quality for AC & DC Systems

10 E T PS S/Re10-2011 Power Transmission Solutions

HVDCHVDC

withwith VSCVSC ––

HVDCHVDC PLUSPLUS

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HVDC PLUS – The Smart Way

Compact Modular Design

Lower Space Requirements

Advanced VSC Technology

Power Transmission Solutions

HVDC PLUS – One Step ahead

E T PS S/Re


HVDC PLUS with MMC – Basic Scheme

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PM 1

PM 2

PM n

PM 1

PM 2

PM n

PM 1

PM 2

PM n

PM 1

PM 2

PM n

PM 1

PM 2

PM n

PM 1

PM 2

PM n

ud

Phase Unit

Vd

10-2011

IGBT2D2

D1IGBT1

Power Module (PM)

Power Module Electronics (PME)

Converter Arm

Converter Reactors

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HVDC PLUS – Options for Converter Modules and

Building Arrangements


A highly flexible Design


Onshore Station Layout –Example 400 MW, +/- 200 kV

AC Busbars

Converter Transformer3-Phase / ODAN

Converter AC Yard,Insertion ResistorsNeutral Reactors

Converter Hall

DC Chopper

Converter Reactors

DC SwitchyardCable Sealing End

130 m

90 m

Control & ProtectionAuxiliaries, Spares


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HVDC PLUS and WIPOS®: SylWin1, Germany –

World’s first Offshore MMC with 864 MW, BorWin2 and HelWin1&2

15 E T PS S/Re Power Transmission Solutions10-2011

WIPOS – Siemens Wind PowerOffshore Substation

Siemens offers a Family of WIPOSDesigns with the Flexibility to meet a Variety of Offshore Weather, Tide, and Seabed Conditions with three main Configurations:

WIPOS self-lifting Solution

WIPOS Topside Solution (Topside/Jacket)

WIPOS floating Solution

The Modular Multilevel Converter Technology (MMC) reduces Comp-lexity and therefore the Space required for Installation 10-2011

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~==

~==

SylWin1864 MW

+/- 320 kV 2014

~==

~==

BorWin2

2013

800 MW

+/- 300 kV

HelWin1

2013+/- 250 kV

576 MW

~==

~==

2015

~==

~==

+/- 320 kV

690 MW

HelWin2


SVC PLUS®

The Advanced STATCOM

Innovation Meets Experience

16 Power Transmission SolutionsE T PS S/Re10-2011

Applications of MMC Technology

(Modular Multilevel Converter)

Single Units:

S: +/- 25 MVAr

M: +/- 35 MVAr

L: +/- 50 MVAr

Up to 4

parallel Units:

+/- 200 MVAr

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Single Line Diagram of SVC PLUS in Comparison with SVC “Classic“


SVC PLUSSVC PLUSSVC “Classic”SVC “Classic” SVC PLUSSVC “Classic”

Variable Impedance Controlled Voltage Source

STATCOM = Static Synchronous Compensator – with Multilevel


SVC PLUS: the Advanced STATCOM

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Source: UCTE Interim Report 10-27-2003Rating: up to +/- 200 MVAr

30 Systems in 15 T & D Projects

Dynamic Voltage Support

2009 - 2013

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19 10-2011 Power Transmission SolutionsE T PS S/Re19 Power Transmission Solutions10-2011 E T PS S/Re

SVC PLUS:

2 x PLUS M in parallel

132 kV / 13.9 kV

Grid Access of Green Energy with SVC PLUS:Thanet, UK – 2 SVC PLUS Systems for 300 MW Wind Farm

2009


Grid Access of Green Energy:Thanet, UK – Offshore Platform

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SVC PLUS:

3 x PLUS L in parallel

132 kV / 13.9 kV

2010

Grid Access of Green Energy with SVC PLUS:Greater Gabbard, UK – 3 SVC PLUS Systems …

21 10-2011 E T PS S/Re Power Transmission Solutions

… and London Array

2011SVC PLUS:


150 kV / 13.9 kV

World’s largest Offshore Wind Farm

630 MW & Upgrade up to 1 GW


Grid Access of Green Energy with SVC PLUS:Greater Gabbard, UK – Leiston Onshore Substation

22 10-2011 E T PS S/Re Power Transmission Solutions

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Inner Gabbard Substation – ‘Sailing out’24th September, 2009

23 Power Transmission Solutions10-2011 E T PS S/Re23 10-2011 E T PS S/Re Power Transmission Solutions


Inner Gabbard Substation – well arrived …and lifted into Position

24 10-2011 E T PS S/Re10-201124 Power Transmission SolutionsE T PS S/Re

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Power Quality for Wind Farm Grid Access

2 SVC PLUS Systems: LINCS 250 MW – CENTRICA, UK

Power Transmission Solutions25 10-2011 E T PS S/Re

SVC PLUS:


132 kV / 13.9 kV

70 Wind Turbines located 8 km off the Coast of Skegness, UK

2011


Power Quality for Wind Farm Grid Access

LINCS 250 MW – AC Jacket going into the Sea Bed

Power Transmission Solutions26 10-2011 E T PS S/Re26 10-2011 E T PS S/Re

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Implementation of a Bulk Power GIL-Installation: GIL-Project with 400 kV at Kelsterbach, Germany

Site View: Status June 2009 Site View: Status October 2009

2010

Laying Process:

Pushing the GIL Element by Element

and Phase by

PhaseGIL vs. Cable

Same Costs

4 Systems2 Systems

Customer: Amprion

Location: Airport Frankfurt

Award of Contract: July 2008

Installation: first directly buried GIL

Transmission Capacity: 2 x 1,800 MVA

Length of GIL: appr. 1 km

Gas for Insulation: 80% N2, 20%SF6

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Conclusions:

Prospects of Smart and Bulk Power

Transmission Technologies

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Solutions with Overhead Lines

Solutions with DC Cables *

High-Voltage DC Transmission: HVDC “Classic” with 500 kV (HV) / 660 kV (EHV) – 3 to 4 GW

HVDC “Bulk” with 800 kV (UHV) – 5 GW to 7.6 GW

AC Transmission: 400 kV (HV) / 500 kV AC (EHV) – 1.5 / 2 GVA 800 kV AC (EHV) – 3 GVA 1,000 kV AC (UHV) – 6 to 8 GVA

Solutions for Smart & Bulk Power Transmission

* Distances over 80 km: AC Cables too complex

Note: Power AC @ 1 System 3 , Power DC @ Bipole+/-


500 / 600 kV DC – per Cable, Mass Impregnated: 1 GW to 2 GW (actual -

prospective)

HVDC PLUS (VSC) ≤ 1,100 MVAFor Comparison:

** Reference: Bowmanville, Canada, 1985 - Siemens

*** Reference: Huanghe Laxiwa Hydropower Station, China, 2009 - CGIT (USA)

400 kV AC (HV) – 1.8 GVA / 2.3 GVA (directly buried / Tunnel or Outdoor)

500 kV AC (EHV) – 2.3 GVA / 2.9 GVA (directly buried / Tunnel or Outdoor) 550 kV AC (EHV) – Substation: Standard 3.8 GVA / Special 7.6 GVA ** 800 kV AC (EHV) – Tunnel: 5.6 GVA ***

Solutions with GIL – Gas Insulated Lines

Option UHV DC 1,100 kV: 10 GW The Winner

is HVDC !

30 10-2011 Power Transmission SolutionsE T PS S/Re Power Transmission SolutionsE T PS S/Re

Connecting:Wind Power

Hydro Plants

Solar Fields

10-201130

The Vision: DC Energy Highway –why not in Europe too ?

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DESERTEC

SEATEC

Thank You for Your Attention !

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