REALISEGRIDREALISEGRIDPST operation in the AUSTRIAN POWER GRID

Klemens REICHVERBUND-APG

2010-02-26 2TREN/FP7/EN/219123/REALISEGRID

congestion 2003congestion 2003--20062006

o Salzburgleitung 1 (under construction)

o Salzburgleitung 2

Steiermarkleitungcompleted mid 2009

congestion

2010-02-26 3TREN/FP7/EN/219123/REALISEGRID

Symmetric PST, Dual Core, 600 MWSymmetric PST, Dual Core, 600 MWL1

L2L3

S1S2

S3

E2

E3

E1

Serientransformator

Erreger-transformator

UZUS / 2 UZUS / 2

L1

L2L3

S1S2

S3

E2

E3

E1

Serientransformator

Erreger-transformator

UZUS / 2 UZUS / 2

L1 S1

L3

L2S3

S2

UZUS

UZUS

UZUS

UZUS / 2UZUS / 2

L1 S1

L3

L2S3

S2

UZUS

UZUS

UZUS

UZUS / 2UZUS / 2

Die Spannungsgröße bleibt unverändert!

By means of a voltage derived from the supply that is first phase-shifted by 90°, and then re-applied to it, a phase angle is developed across the PST. It is this induced phase angle that affects the flow of power through specified circuits.

Series transformer

Rectifiertransformer

2010-02-26 4TREN/FP7/EN/219123/REALISEGRID

PhaseshifterPhaseshifter TransformersTransformers TransportTransport

2006

2010-02-26 5TREN/FP7/EN/219123/REALISEGRID

TAUERN

D

St. Peter

OBER-SIELACH

Hessenberg

ERNSTHOFEN

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 30 20 km

CZ

SK

H

SLOI

rol

Zell amZiller

Kainachtal

Südburgenland

Dürnrohr

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

WeißenbachSTN

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

Sokolnice

Neusiedl

Hauptstufe

Klaus

Etzersdorf

Salzach-Neu

STN

STS

STN

STS

STS

KELKEL

KEL

SASA

SAKA

EVN

So gelingt es NUR den derzeitigen

Krisenzustand zuhalten

Emergency measurements since 2006Emergency measurements since 2006

DUAL CORE

3 x Phase3 x Phase--shifting transformersshifting transformers

as line protection

Only a shortOnly a short term solution

emergency measurements (Redispatch, etc) are still necessary

Neighboring networks are also fighting with their own line capacities

Effect of the PSTEffect of the PST

Increase of the N-S Capacity from 1200 MW to 1400 MW

Limiting the internal N-S load flows

The only way to operate

the grid (n-1) safe

2010-02-26 6TREN/FP7/EN/219123/REALISEGRID

The North-South load flow can be directly controlled with PSTBalanced distribution on all 3 N-S-linesIncrease of security of supply – protection for line outages

1200 MW

2005

(n-1) threshold

1400 MW+ 200 MW extra useable

N-S-Capacity

Equivalent to 400 MW Redispatch

Necessary congestion management

Effect of the Operation of Effect of the Operation of PSTsPSTs

congestionmanagement

useable N-S-Capacity

2007: with PST

gain ofcapacity

reduced congestion

management

2010-02-26 7TREN/FP7/EN/219123/REALISEGRID

TAUERN

D

St. Peter

OBER-SIELACH

Hessenberg

ERNSTHOFEN

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

Sokolnice

GyörGyör

Neusiedl

Hauptstufe

Klaus

Etzersdorf

Salzach-Neu

Example: load flow situation with/ without PSTsWithout PSTs: (n-1)-violations With PSTs: secure gird operation

Grid Grid controlcontrol withwith PSTsPSTs

(1500 !!)

(440)380

420 420

xxx …loadflows with (MW) PST

(360)

(420)

(xxx) …loadflows (MW) without PST

2010-02-26 8TREN/FP7/EN/219123/REALISEGRID

TAUERN

D

St. Peter

OBER-SIELACH

Hessenberg

ERNSTHOFEN

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

Sokolnice

GyörGyör

Neusiedl

Hauptstufe

Klaus

Etzersdorf

Salzach-Neu

Experience with PST operation:Experience with PST operation:Fault in one highly loaded SystemFault in one highly loaded System

Cable failure on the line Wien Süd-Ost – Ternitz (2 Systems 220kV), 20071 System severely damaged!!!1 System can be switched back on

2010-02-26 9TREN/FP7/EN/219123/REALISEGRID

Defect at cable terminalDefect at cable terminal (22.1.2007, 12:14)(22.1.2007, 12:14)220 kV220 kV--line Wien line Wien SSüüdostdost--TernitzTernitz (System 225B)(System 225B)

220 kV-line Wien Südost Ternitz(Systems 225B/226B) important N-S-Connection in the Austrian Grid

800 m cable connection (in operation since 1999) between the 380 kV- und 220 kV-part of the sub-station Wien Südost

Cause:Flash over due to oil spill causing shortages on other linesr (strong winds)System 226B was hit, switched back on at12:50 (26 minutes)

down time 5 weeks

consequential failures on the 110 kV-Grid in the south of Vienna:

System 122/8 (Ternitz-Neudörfl, BEWAG Netz)System 122/9 (Wr. Neustadt-Ebenfurth, Wien Energie Stromnetz) (switched back on at 12:54)

2010-02-26 10TREN/FP7/EN/219123/REALISEGRID

TAUERN

D

St. Peter

OBER-SIELACH

Hessenberg

ERNSTHOFEN

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

Sokolnice

GyörGyör

Neusiedl

Hauptstufe

Klaus

Etzersdorf

Salzach-Neu

Real Situation: System SOReal Situation: System SO--TE with PSTTE with PST

…PST in operation

Expanded PST-Operationcurrently needed congestion management: 250 MWnormal load flowSituation under control

207 412

388

xxx …load flow after outage

2010-02-26 11TREN/FP7/EN/219123/REALISEGRID

TAUERN

D

St. Peter

OBER-SIELACH

Hessenberg

ERNSTHOFEN

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

WIENSÜDOST

Bisam-berg

Ternitz

Lienz

50 40 5 30 20 10 0 km

CZ

SK

H

SLO

I

CH

Westtirol

Zell amZiller

Bürs

Obermooweiler

MemmingenLeupolz

Kainachtal

Südburgenland

Dürnrohr

Meiningen

Pradella

Salzach

Pongau

Kaprun

PleintingPirach

AltheimSimbach

Aschach

Wallsee

YbbsfeldHausruck

Pyhrn

Weißenbach

SoverzenePodlog

Maribor

Oststeiermark

Slavetice

Kle-dering

Sokolnice

GyörGyör

Neusiedl

Hauptstufe

Klaus

Etzersdorf

Salzach-Neu

SzenarioSzenario: 1 System SO: 1 System SO--TE TE without PSTwithout PST (1)(1)

510

498

381

currently needed congestion management: 250 MWall 3 N-S-lines over loaded!security thresholds not exceeded! forbidden grid operation!emergency measures needed!!!

(400)

(400) (300)

xxx …loadflows after outage(security threshholds)

2010-02-26 12TREN/FP7/EN/219123/REALISEGRID

PST operation in the AUSTRIAN POWER GRID

Arenhem, September 2010Klemens Reich, VERBUND-APG