Energy Sector

© Siemens 2009

IEC 61850 V Legacy Protocols

Energy Automation Solutions

Warner Priest

Page 2 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Benefits of IEC61850

The benefits of IEC61850 are not in the price of the relay itself, but realised within the

systems a number of relays are applied in, these are summarized as follows:-

�IEC61850 is unique in that it is not a recast serial RTU Protocol

�It is specifically designed for LANs to lower life cycle costs, cheaper to install,

configure and maintain

�It is a real object orientated approach for Substation Automation supporting

standardized device models using names instead of numbers and indexes

�It uses a standard configuration language, (SCL)

�It is feature rich with support for functions difficult to implement otherwise

Page 3 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Cost Benefits of IEC61850 over DNP3

When comparing DNP3 and IEC61850 implementations, the real cost benefits are

seen in the engineering and repetitive applications of designs through plants or

utilities:-

Real World Example

DNP3.0 over TCP and UDP

- DNP3.0 relay configured & communicating – 8hrs

IEC61850

- IEC61850 relay configured & communicating – 20min

Page 4 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Purchase Price is Quickly Recovered

Page 5 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Example of a TIA application

DNP3 - Ethernet

GOOSEBay to Bay

IEC 61850 Station LAN 100 Mbit/sPROFINET

PROFIBUS DP

IEC 61850

TCP-IP ETHERNETTCP-IP ETHERNET

Transformer FeederLarge High Voltage

Motor Feeder

Small Low Voltage

Motor Feeder

Managed SwitchCV

SICAM PAS CC

Power Automation

WIN CC

Industrial ProcessSICAM PAS Station

Unit Server

S7400 PLC Server

Hardwire interface to PLC &/or SIMOCODE

Use GOOSE to distribute information into the plant very

quickly, for instance Load Shedding

Page 6 April-2009

© Siemens 2009

Sector EnergyWarner Priest

IEC61850 Applications Extended to the Plant

DNP3 - Ethernet

LV Breaker for Motor 1

LV Breaker for Motor 3

LV Breaker for Motor 1

LV Breaker for Motor 3

33/0.525kV Transformer Fdr Board 1

33/0.525kV Transformer Fdr Board 2

33kV Main Plant Sub Incomer 1

33kV Main Plant Sub Incomer 2

SICAM PAS (DNP3 /

IEC61850)

DNP3 Load Shedd Signal from Western

Power

Firewall / Router

The logic is processed

in the RTU / SC

5msec

Further 25msec

40msec

Process in PLC

Process in PLC

40msec

GOOSE Message

70msec prior to breaker operation

70msec prior to breaker operation

Main Distribution Substations

Plant Substations

RuggedComManaged

Switch

Interlocking

Breaker FailBusbar

Blocking

3rd Party IEC61850 compliant

IED3rd Party

IEC61850 compliant

IED

Page 7 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Hardwire time to operate

Relay Energises Contacts Close

SIG

NA

L

TIME

HARDWIRED PERFORMANCE

Input Threshold Reached

8 – 20 mSec

Page 8 April-2009

© Siemens 2009

Sector EnergyWarner Priest

IEC61850 GOOSE time to operate

Page 9 April-2009

© Siemens 2009

Sector EnergyWarner Priest

IEC61850-GOOSE (Bay to Bay)

Overtaking lane for IEC GOOSE

normal telegram buffer

Ethernet-Switch

GOOSE

normal telegrams

Only IEC 61850 takes advantage of the features of modern 100 MBIT-Ethernet networks

the rapid

Priority tagging of GOOSE – telegrams

Not UCA2.0, Not DNP, Not 60870-5-104 !

Page 10 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Advantages of IEC61850 over DNP3 / Hardwire

� Ring structure is very reliable, redundant, fulfils n-1 condition

� Fibre connections thus no negative influence from EMI / EMC

� The substation can be controlled without the SMU / data concentrator /

RTU

� Interlocking through substation or plant can be done via GOOSE &

ss2ss GOOSE, without the need for a master / slave relationship (inter

device communication / peer to peer communication, Generic Object

Orientated Substation Event)

� GOOSE can be used to send several required signals to all the

SIPROTEC IEDs and 3rd party IEDs in the network

Page 11 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Advantages IEC61850 over DNP3 / Hardwire

� If one IED fails, interlocking logic of the other IEDs will realise the

non topical state and block switching

� Equipment migrations occur with minimal impact on applications

� Application changes have minimal effect on devices, network or

other applications

� More flexible programming is independent of wiring

� Fast communication with a single or redundant 100Mbit/s bus

� All data from all IEDs are available to all devices in the network,

engineering station, Main HMI, Remote HMI, Process Plant, etc

� Higher performance with more data exchange

Page 12 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Advantages IEC61850 over DNP3 / Hardwire

� Reliability: Link Status know before use (ideal for load-shedding,

Interlocking and Protection where use of hardwire interfaces that fail

will only be known when the operation fails to operate as intended)

� Digital Error checking instead of Analogue Filtering

� Data is transmitted multiple times to avoid missing data

� Data Concentrator / RTU will automatically download all new fault

records from IEDs using RecPro

� HMI will store all measured and metered values accessible via

ValPro software

� All alarms and events are stored on the HMI where you can set the

time and date of archiving

Page 13 April-2009

© Siemens 2009

Sector EnergyWarner Priest

1001000.120.12120.19Transmission Speed

EventEventMaster / SlaveMaster /

Slave

Master /

Slave

Master /

SlaveData Transmission

Engineering Support

Processbus

Inter-operability

Fault Records

Time Sync

Measurements

Commands

Indications

IEC 61850UCA 2ModbusDNP 3.0ProfibusIEC 103

�

�

�

�

�

�

�

�

�

�

�

�

� �

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

Comparison of Different Standards/Protocols

without

time stampwithout

time stamp

withouttime stamp

�

�

�

Page 14 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Disadvantages of legacy protocols

The development of the IEC61850 standard has mainly been driven by users, due

to the difficulties in integrating multiple protocol types and the general inherent

problems with legacy serial communication protocols:

�Specialized point to point links to IEDs

�Applications must deal with numerous protocols, data formats, data addressing,

etc

�Protocols used have limited capabilities

�Difficult or no access points for other applications

�Communication paths must be re-configured when new devices or applications

are added

Page 15 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Comparison of Different Standards/Protocols

StationLevel

ControlCentreLevel

BayLevel

ProcessLevel

-

Yes

Yes

-

Yes

Yes

Yes

Yes

Yes

-

Yes

Yes

-

Yes

Yes

Yes

(future)

Yes

Yes

IEC60870-5-103

Profibus DNP Modbus LON IEC61850

no no no no no Yes

GlobalAdoption partly partly no no no Yes

EngineeringSupport no partly no no no Yes

Page 16 April-2009

© Siemens 2009

Sector EnergyWarner Priest

Redundant

OS/MS-Server

Simatic IT Historian

OS Web Server

System bus Industrial Ethernet (100 MB/s)

Simatic IT Report Manager

SICAM PAS PCS 7 OS Server

IEC 61850 (Ethernet TCP/IP)

Relay 1

…

Relay 2

Relay 26

Terminal bus Industrial Ethernet (100 MB/s)

Boiler

PR

OF

IBU

S-D

P (

Red

un

dan

t)

AS 417-4

H

PROFIBUS-PA

. .

.

DP/PA-Link

. .

.

Micromaster

Simocode

Y-Link

ET 200M

...

PCS 7 OS Engineering

with SICAM PAS Full

Engineering

PCS 7 OS Single

Station SICAM PAS CC

HMI

SICAM PAS

Station

Unit

Main Control Room

Power Control Room

Time Synch Master (GPS)

…Process

Controller

1AS 416-3

PR

OF

IBU

S-D

P

AS – Interface

. .

.

DP/AS-I Link

. .

.

MicromasterSimocode

PROFIBUS-

PA

. .

.

DP/PA-

Link

Process

Controller

1AS 416-3

PR

OF

IBU

S-D

P

AS – Interface

. .

.

DP/AS-I Link

. .

.

MicromasterSimocode

PROFIBUS-

PA

. .

.

DP/PA-

Link

PCS 7 ES with SICAM

PAS OS EngineeringOS

Client

OS

Client

OS

Client

OS

Client

OS

Client

OS

Client

OS

Client

OS

Client