www.siemens.com/energy/facts

FACTS – Flexible AC Transmission Systems Static Var Compensators

Answers for energy.

Reference List Static Var Compensation – rely on our experience

Nowadays, power producers and providers throughout the world are faced with greater demands for bulk power flow, lower-cost power delivery, and higher reliability. Siemens as a leading manufacturer of FACTS devices delivers systems throughout the world.

References not described in this brochure

2

■

Lakehead, Canada in service since 2010

■

Limpio, Paraguay in service since 2003

■

Harker, UK in service since 1993

■

Alligator Creek, Australia in service since 2009

■

Funil, Brazil in service since 2001

■

Eddy County, USA in service since 1992

■

Bellaire, USA in service since 2008

■

La Pila, Mexico in service since 1999

■

Pelham I + II, UK in service since 1991

■

Crosby, USA in service since 2008

■

Cerro Gordo, Mexico in service since 1998

■

Kemps Creek I + II, Australia in service since 1989

■

Strathmore, Australia in service since 2007

■

Chinú, Colombia in service since 1998

■

Brushy Hill, Canada in service since 1986

■

Sinop, Brazil in service since 2007

■

Muldersvlei, South Africa in service since 1997

■

Banabuiu, Brazil in service since 1983

■

São Luis, Brazil in service since 2007

■

Rejsby Hede, Denmark in service since 1997

■

Milagres, Brazil in service since 1983

■

Nopala, Mexico in service since 2007

■

Adelanto & Marketplace, USA in service since 1994/1995

■

Fortaleza, Brazil in service since 1982

■

Segaliud & Dam Road, Malaysia in service since 2006

■

Jember, Indonesia in service since 1994

■

Zem Zem, Libya in service since 1982

■

Ahafo, Ghana in service since 2006

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Feckenham, UK in service since 1994

■

Shinyanga & Iringa, Tanzania in service since 2006

■

Drakelow, UK in service since 1994

Siemens solutions for advanced power delivery bring a number of major benefits including:

■ Improvement of system stability

and power quality ■ High reliability under system

contingencies

■ Steady state and dynamic

voltage control

The total installed capacity of Siemens Static Var Compensators exceeds 30,000 MVAr granting a true global experience and customer support.

■ Reactive power control

of dynamic loads ■ Damping of active power

oscillations

References described in this brochure

In-service date 01

Page

2011 2012

Hiteen, Qassim & Afif

Saudi Arabia

6

02

2011

Nanticoke

Canada

7

03

2011

Chevire

France

8

04

2010

Elmhurst

USA

9

05

2009

Islington

New Zealand

10

06

2008

Greenbank & Southpine

Australia

11

07

2007

Railways & Nebo

Australia

12

08

2006

Radsted

Denmark

14

09

2006

Devers

USA

15

10

2006 2005

Porter & Ninemile

USA

16

11

2004

Siems

Germany

17

12

2002

Bom Jesus da Lapa

Brazil

18

13

1995

Impala, Illovo & Athene

South Africa

19 3

References worldwide Utility Static Var Compensators delivered by Siemens Bellaire Center Point Energy, USA (0/140 MVAr) 138 kV 2008

Crosby Center Point Energy, USA (0/140 MVAr) 138 kV 2008

Eddy County SPS, USA (–50/100 MVAr) 230 kV 1992

Lakehead Hydro One, Canada (–40/45 (60) MVAr) 230 kV 2010

Nanticoke Hydro One, Canada (0/350 MVAr) 500 kV 2011

Brushy Hill NSPC, Canada (–20/120 MVAr) 138 kV 1986

Elmhurst ComEd, USA 2 x (0/300 MVAr) 230 kV 2010

Adelanto & Marketplace WSCC, USA (0/388 MVAr) 500 kV 1994/1995

La Pila CFE, Mexico (–70/200 MVAr) 230 kV 1999

08 11

Devers SCE, USA (–110/330 (440/1 h) 605) MVAr 500 kV 2006

02 04

Chevire RTE, France (–100/100 (250) MVAr) 225 kV 2011

03

09 Porter & Ninemile Entergy, USA (0/300 MVAr) 138/230 kV 2005/2006

10

Cerro Gordo Luz y Fuerza, Mexico (–75/300 MVAr) 230 kV 1998 Nopala CFE, Mexico (–90/300 MVAr) 400 kV 2007

12

Chinú ISA, Colombia (–150/250 MVAr) 500 kV 1998

Bom Jesus da Lapa Enelpower, Brazil (–250/250 MVAr) 500 kV 2002

Funil CHESF, Brazil (–100/200 MVAr) 230 kV 2001 Sinop ELETRONORTE, Brazil (–20/55 MVAr) 230 kV 2007

4

Milagres CHESF, Brazil (–70/100 MVAr) 230 kV 1983

Banabuiu CHESF, Brazil (–70/100 MVAr) 230 kV 1983

Fortaleza CHESF, Brazil (–140/200 MVAr) 230 kV 1982

São Luis ELETRONORTE, Brazil (–100/150 MVAr) 230 kV 2007

Limpio ANDE, Paraguay (–150/250 MVAr) 220 kV 2003

Ahafo CONCO, Ghana (–40/0 MVAr) 161 kV 2006

Harker NGC, UK (–75/150 MVAr) 275 kV 1993

Drakelow NGC, UK (–75/150 MVAr) 275 kV 1994

Feckenham NGC, UK (–75/150 MVAr) 275 kV 1994

Pelham I + II NGC, UK (–75/150 MVAr) 400 kV 1991

Rejsby Hede ELSAM, Denmark (–8/8 MVAr) 15/3 kV 1997

Radsted SEAS-NVE, Denmark (–65/80 MVAr) 132 kV 2006

Hiteen Saudi Electricity Company, Saudi Arabia (–200/600 (800) MVAr) 380 kV 2011 Qassim Saudi Electricity Company, Saudi Arabia (–150/450 MVAr) 132 kV 2011

Afif Saudi Electricity Company, Saudi Arabia (–50/100 MVAr) 33 kV 2011 Siems E.ON Netz GmbH, Germany (–100/200 MVAr) 380 kV 2004 Zem Zem ELPCO, Libya (–50/25 MVAr) 230 kV 1982

01

Segaliud & Dam Road SESB, Malaysia (–60/60 MVAr) 132/275 kV 2006

Jember PLN, Indonesia (–25/50 MVAr) 150 kV 1994

13

Railways & Nebo Powerlink, Australia Refurbishments (–80/260 MVAr) 132/275 kV 2007

Greenbank & Southpine Australia (–100/250 (350) MVAr) 275 kV 2008

07 06

Shinyanga & Iringa TANESCO, Tanzania (–30/35 MVAr) 220/220 kV 2006

Impala, Illovo & Athene ESKOM, South Africa (–300/100 MVAr) 275/275/400 kV 1995

Muldersvlei ESKOM, South Africa (–150/200 MVAr) 400 kV 1997

05

Alligator Creek Powerlink, Australia (–80/150 (230) MVAr) 132 kV 2009

Strathmore Powerlink, Australia (–80/180 (260) MVAr) 275 kV 2007

Islington Transpower, New Zealand (–75/150 MVAr) 220 kV 2009

Kemps Creek I + II ECNSW, Australia (–100/150 MVAr) 330 kV 1989

5

Hiteen, Qassim & Afif Siemens to supply technology for stabilization of high-voltage transmission network in Saudi Arabia

Siemens will supply three static Var compensators (SVCs) for different high-voltage levels to Riyadh-based Saudi Electricity Company (SEC) for stabilization of the country’s 60-Hertz power transmission network. The parallel compensation systems will be deployed at three Saudi sites in the Hiteen, Quassim and Afif substations and are scheduled to be ready for operation between mid-2011 and early 2012. “We are pleased that our field-proven technology will be deployed to stabilize the Saudi power transmission network,” said Udo Niehage, CEO of the Power Transmission Division of Siemens Energy. The three systems ordered are intended for the 380-kV, 132-kV and 33-kV voltage levels and will have a dynamic compensation capacity of as much as 800 MVAr.

380 kV, 60 Hz

Technical Data Hiteen

Qassim

Afif

Customer

Saudi Electricity Company, Saudi Arabia

System voltage

380 kV/60 Hz

132 kV/60 Hz

Transformer

4 x 200 MVAr

4 x 150 MVAr

Operating range

–200/600 (800) MVAr

–150/450 MVAr

–50/100 MVAr

2 x TCR 2 x TSC 2 x Filter

1 x TCR 1 x TSC 3 x Filter

Definition of SVC 2 x TCR branch circuits 2 x TSC 2 x Filter MSCDN

132 kV, 60 Hz

33 kV, 60 Hz

Filter 2

Filter 2 CF2

CF2 LF2

LF2 L TCR 1

L TCR 1 2

LTSC 1

L TCR 2 2

LTSC 2

L TCR 1 2

LF1

LTSC 1

LTSC 2

L TCR 2 2

CF1

TCR 1

CTSC 1 TSC 1

L TCR 2 2

CTSC 2 TSC 2

TCR 2

CF1 L TCR 1 L TCR 1 2

LMSC Filter 1 MSC

Hiteen

TCR 1

Qassim

Iraq Iran

Egypt

Saudi Arabia Sudan Oman

Yemen 6

LTSC 1

2

LF1

CMSC L TCR 1 2

33 kV/60 Hz

CTSC 1 TSC 1

CTSC 2 TSC 2

2

L TCR 2 2 TCR 2

LF1

LF2

CF1 Filter 1

TCR 1

Filter 1

Afif

LF3

CF2

CF3

Filter 3 Filter 2

CTSC 1 TSC 1

Nanticoke New Static Var Compensator (SVC) for Nanticoke in Canada

In August 2009 Siemens signed the turnkey contract for engineering, delivery of components, erection and commissioning for the Static-Var-Compensators (SVC) at the Nanticoke substation in Canada. The SVC has a nominal operating range of 0 MVAr to 350 MVAr capacitive. The customer, Hydro One, requires the SVC to facilitate post contingency voltage stability in their 500 kV grid associated with the planned shutdown of a central 4000 MW coal-fired generating source. The Nanticoke SVC includes 5 TSC branches and is equipped with a redundant contol system and four single-phase transformers. Start of commercial operation is scheduled for mid 2011.

Technical Data Customer

Hydro One, Canada

System voltage

500 kV, 60 Hz

Transformer

4 x 117 MVAr

Operating range

0–350 MVAr

Definition of SVC branch circuits

5 x TSC

500 kV, 60 Hz

LTSC 1

LTSC 2

LTSC 3

LTSC 4

LTSC 5

CTSC 1

CTSC 2

CTSC 3

CTSC 4

CTSC 5

TSC 1

TSC 2

TSC 3

TSC 4

TSC 5

Canada

United States of America

7

Chevire Strengthening the 225 kV network in Brittany, France

A new Static Var Compensator (SVC) in RTE’s existing 225 kV Cheviré substation is scheduled to be energized in Nantes, in the north-west of France by end of October 2011. The SVC will provide dynamic control of the 225 kV network voltage of the Brittany region during high demand periods as, in the past, Brittany network was one of the weakest in France. The SVC output will range from 100 MVAr inductive to 100 MVAr capacitive at 225 kV and additionally contain and control one mechanically switched capacitor bank of 150 MVAr.

Technical Data Customer

RTE, France

System voltage

225 kV/50 Hz

Transformer

100 MVAr

Operating range

100/100 (250) MVAr

Definition of SVC branch circuits

1 x TCR 1 x TSC 1 x Filter MSC

RTE is managing the largest network in Europe, ensuring connections between France and its neighbors. The utility is an essential link in the European electricity market. It takes part in constructing the European electricity market by playing a structuring role, thus contributing to better use of the different sources of energy on a European level. The SVC from Siemens will help to stabilize the RTE network especially in the Brittany region.

225 kV, 50 Hz

L TCR 1 2

LTSC 1

LF1 CF1

CMSC LMSC

L TCR 1 2 TCR 1

Belgium

Germany

Luxembourg

France

Switzerland Italy

Spain 8

CTSC 1

TSC 1

Filter 1

MSC

The Elmhurst SVCs – Enhancement of power availability and reliability for ComEd’s power grid in the area of Chicago, Illinois

In November of 2008 Siemens Energy, Inc. was awarded a turnkey contract for two 138 kV Static Var Compensators (SVC’s) by Commonwealth Edison Company (ComEd) for the Elmhurst Substation in Chicago, USA. The installation of the Elmhurst SVCs will contribute to the stabilization of the Northeast Subzone (NESZ) within ComEd’s heavily populated northern Illinois service territory. This will be the first SVC application that ComEd has awarded for installation in their system. Commonwealth Edison Company (ComEd) is a unit of the Chicago-based Exelon Corporation (NYSE: EXC), one of the nation’s largest electric utilities. It’s mission is to maintain the performance of its electrical transmission and distributions systems of its region while providing the customers with reliable and economical electrical service. Two Siemens’ SVCs with an availability of nearly 100 % will be installed at the Commonwealth Edison substation in Elmhurst, to maintain transmission stability into the future. The turnkey contract includes all equipment and civil works for two identical SVCs, rated at 0/+300 MVar each. One SVC consists of three Thyristor Switched Capacitors (TSC) branches. During normal operation the SVCs will only be controlling the existing Mechanically Switched Capacitor Banks (MSCs) at Elmhurst to provide steady state VAR support. In case of voltage drop, the TSC’s will respond immediately and offer voltage stability.

Technical Data Customer

ComEd, USA

System voltage

138 kV/60 Hz

Transformer

300 MVAr

Operating range

2 x (0/300) MVAr

Definition of SVC branch circuits

3 x TSC

138 kV, 60 Hz

LTSC 1

LTSC 2

LTSC 3

CTSC 1

CTSC 2

CTSC 3

TSC 1

TSC 2

TSC 3

Using the TSC’s only in case of an emergency avoids additional losses to the grid.

Canada

United States of America

9

Islington Voltage stabilization around Christchurch

System studies by Transpower, the transmission utility in New Zealand, identified insufficient dynamic reactive support under some situations, for satisfactory voltage recovery following a system disturbance in the region surrounding Christchurch in the South Island. In March 2007 Siemens Energy was awarded a turnkey contract for a SVC at Islington substation. The installed SVC has a nominal swing range of 75 MVAr inductive to 150 MVAr capacitive. The SVC consists of a thyristor controlled reactor (TCR), thyristor switched capacitors (TSC) and 2 fixed harmonic filters. The SVC is connected to the 220 kV bus with a dedicated power (3rd party) transformer. As turnkey contractor, Siemens was responsible for project management, engineering, procurement, delivery, civil and assembly works as well as site testing & commissioning. Siemens Germany delivered HV switchgear, valves and associated cooling system, control & protection (C&P) systems, Trench reactors and capacitors. The local Siemens team (on-shore) based in AUS/NZ managed the total project and delivered a successful project on time by carefully managing on-shore and off-shore resources & third-party local suppliers and sub-contractors. The result was an efficient progress of the sequential civil works, construction, installation and commissioning periods. Transpower particularly commended Siemens on construction site management and safety performance. The Islington SVC entered commercial operation in September 2009.

New Zealand

10

Technical Data Customer

Transpower, New Zealand

System voltage

220 kV/50 Hz

Transformer

3 x 50 MVAr

Operating range

–75/150 MVAr

Definition of SVC branch circuits

1 x TCR 1 x TSC 1 x Filter 220 kV, 50 Hz

L TCR 1 2

LTSC 1

LF1 CF1

L TCR 1 2 TCR 1

CTSC 1

TSC 1

Filter 1

Greenbank & Southpine Voltage support to the greater area of Brisbane

Technical Data Customer

Powerlink, Australia

System voltage

275 kV/50 Hz

Transformer

250 MVA

Operating range

–100/250 (350) MVAr

Definition of SVC branch circuits

1 x TCR 2 x TSC 3 x Filter

In April 2007 Siemens Energy was awarded a turnkey contract for two SVCs at Greenbank and South Pine substations in the South East Queensland (SEQ) 275 kV grid of Australia. With the installation customer Powerlink plan to provide sufficient power compensation and to add additional voltage support to the greater area of Brisbane by dynamic reactive power compensation.

275 kV, 50 Hz Filter 2 CF1 LF1

The SVCs have a nominal operating range of 100 MVAr inductive to 250 MVAr capacitive with an overload of up to 350 MVAr for one hour. Each SVC consists of one thyristor controlled reactor (TCR), two thyristor switched capacitors (TSC) and three fixed filter circuits for harmonics. Being the turnkey contractor, Siemens was responsible for design engineering, delivery, civil and assembly works as well as site testing. Transformers were manufactured locally in Australia and Siemens Germany delivered the core technology, i.e. thyristor valves and the SVC control & protection (C&P) system, assembled and tested. The successful team effort by the international management team achieved the completion for both sites on time. Greenbank and Southpine SVCs started operation in 2008.

L TCR 1 2

LTSC 1

LTSC 2

LF1 CF1

LF3 CF3 CMSC

L TCR 1 2 TCR 1

CTSC 1 TSC 1

CTSC 2 TSC 2

LMSC Filter 1 Filter 3 MSC

Australia

11

Refurbishment of the Nebo SVC Just five months delivery time for a TSC-Valve

In spring 2005 the refurbishment of Powerlink’s Nebo SVC (originally built by a competitor) was awarded to Siemens. The scope of work for this SVC, consisiting of a Thyristor Switched Capacitor (TSC) and a Thyristor Controlled Reactor (TCR) branch, included the thyristor valves and accessories, the thyristor cooling system and the complete control and protection system. Since the TSC plays an important role in Powerlink’s network, the contract was divided into two parts, the first of which placed two major challenges. ■

■

To replace the damaged TSC valve in only five months – and to integrate a Siemens TSC valve into a competitor’s control and protection system. The key to success was a very detailed status quo investigation including thorough checks of all interfaces – and minute logistic planning. The complete Control and Protection System and the TCR valve were successfully refurbished and Powerlink took over the complete refurbished SVC even before the contractual date of practical completion.

Oonooie

Mackay

Nebo Coppabella Moranbah Mt. McLaren

Dysart Gregory Rockhampton Blackwater

Australia 12

Grantleigh Dingo

Technical Data Customer

Powerlink, Australia

System voltage

275 kV/50 Hz

Transformer

180 MVA

Operating range

+ 260 MVAr (capacitive) to – 80 MVAr (inductive)

Definition of SVC branch circuits

1 x TCR 1 x TSC 2 x STF

SVCs for railway system A 48-hours outage solution from Siemens

encompasses the remote control of the SVCs. To support the coal transport system’s reliability, the SVCs had to remain in service as long as possible throughout the refurbishment project. Only Siemens was able to offer a solution that limited the outage time per site to 48 hours: This was achieved by introducing a mobile SVC solution that can be used during the main refurbishment work on each site. Thus, shutdown is only required to re-establish connections to the mobile system after disconnecting the existing system and, of course, for testing. The Railway SVC refurbishment project was completed at the end of 2007.

At almost the same time as the Nebo project, Powerlink placed another refurbishment order for nine SVCs in their network. These SVCs are supporting an important railway system in central Queensland used for transporting coal from the inland mines to the coal terminals at Queensland’s coastline. The scope of work included the replacement of the thyristor valves, the cooling system and the web based control and protection system, which

13

Radsted An SVC, that controls voltage fluctuations caused by an offshore windpark

Technical Data

Norway Sweden

Denmark Copenhagen

Netherlands

Poland Germany

14

System voltage

132 kV/50 Hz

Transformer

80.2 MVA

Operating range

+ 80.2 MVAr (capacitive) to – 65 MVAr (inductive)

Definition of SVC branch circuits

12-pulse configuration 2 x TCR 2 x Filters

132 kV, 50 Hz Y

Siemens offered a special solution for this project: the SVC has a 12-pulse configuration consisting of a TCR (Thyristor Controlled Reactor) and a filter in each of the two secondary circuits of the 3-winding step-down power transformer. One of the transformer’s secondary winding is connected in star, while the other is connected in delta. The delivered high-pass filters are tuned to the 11th harmonic and are connected in star. The 12-pulse configuration has the advantage that due to the phase shift in the two secondary busbars of the SVC, the 5th, 7th, 17th and 19th harmonics produced by each of the TCR branches cancel each other out, helping to meet the stringent harmonic requirements.

SEAS-NVE, Denmark

Y

SEAS-NVE, the largest utility in Denmark operates the Nysted Offshore Windpark located south of the island of Lolland. Voltage fluctuations caused by this facility lead to voltage stability problems in the 132 kV transmission system. In June 2005, Siemens was awarded a turnkey project for the construction of an SVC located on the island of Lolland. It provides the necessary reactive power balance for the system, helps to improve voltage quality and increases system stability.

Customer

Δ

LTCR 1

LTCR 2 LF 1

RF 1 CF 1

TCR 1

Filter 1

LF 2

RF 2 CF 1

Filter 2

TCR 2

Furthermore Siemens took special care to fulfill the customer’s requirements in terms of noise reduction and architectural appearance. Therefore, the SVC was completely housed in a “barn-type” building equipped with special sound muffling materials and components. The buildings height was kept below 6 meters, made possible by optimizing the equipment configuration inside.

Devers Strengthening the transmission path between Arizona and California

Technical Data Customer

SCE, USA

System voltage

525 kV/60 Hz

Transformer

4 x 100 MVA

Operating range

+ 330 MVAr up to – 110 MVAr (inductive) + 440 MVAr capacitive for one hour

One of the largest SVCs in the US is located at Devers 500 kV substation, near Palm Springs, California. The Devers SVC was ordered by SCE (Southern California Edison) as a turnkey project in September 2005 to strengthen the Devers-Palo Verde transmission path from Arizona to California. Since it was put into commercial operation in September 2006 the SVC adds additional voltage support to the Palm Springs area, thus SCE can increase its import transmission capability from Arizona during high demands period.

+ 605 MVAr max. Definition of SVC branch circuits

2 x TCR 3 x TSC 2 x Filters MSC

525 kV, 60 Hz

Filter 2

The full capacitive output of the SVC of 330 MVAr is provided by two TSC branches and two filter branches. The capacitive output of 440 MVAr for 1 h is provided by three TSC branches, two filter branches and one TCR in operation. The SVC’s full inductive output of 110 MVAr is provided by two TCR branches operating in parallel with the filters. In addition to the SVC, an MSC of 165 MVAr connected to the 525 kV bus was included in the scope of supply, conforming a Static Var System (SVS) with total capacitive output of 605 MVAr.

CF2 LF2 L TCR 1 2

LTSC 1

LTSC 2

LTSC 3

L TCR 2 2

LF1 CF1 CMSC

L TCR 1 2 TCR 1

CTSC 1

TSC 1

CTSC 2

TSC 2

CTSC 3

TSC 3

L TCR 2 2 TCR 2

L MSC

Filter 1

MSC

Los Angeles San Diego

Co

San Francisco

lor

ado

United States of America

Phoenix

Mexico

15

Porter & Ninemile Application of Static Var Compensators in Entergy’s system to address voltage stability issues

Technical Data

Based on planning studies, two major load centers (The Westbank area near New Orleans and the Woodlands area just north of Houston) in Entergy’s network were identified as areas with potential voltage stability problems. After evaluation of technical, economical and reliability factors, SVCs were considered as the preferred solution for both of these areas. In conjunction with Entergy’s SVC design specifications, two SVCs and a Fixed Series Capacitor (FSC) were awarded on a turnkey basis to Siemens Power Transmission Division in 2004. The first 300 MVAr SVC was commissioned at the Ninemile 230 kV station in the New Orleans area in May 2005. The second 300 MVAr SVC at Porter 138 kV station as well as the new FSC at Dayton Substation entered into operation in Entergy’s Western Region near Houston, Texas in April 2006.

Denver

St Louis

United States of America

Co

lor

ad

o

Chicago

Ar

Santa Fe

ka

Phoenix

ns

as

Dallas New Orleans

Rio

Mexico

Gr

Porter Houston

an

de

Monterrey 16

Ninemile Gulf of Mexico

Customer

Entergy, USA

System voltage

230 kV/60 Hz (Ninemile) 138 kV/60 Hz (Porter)

Transformer

4 x 100 MVA each SVC

Operating range

+ 300 MVAr (capacitive) to 0 MVAr (inductive)

Definition of SVC branch circuits

3 x TSC

Siems The first utility SVC in Germany

Technical Data

The HVDC Baltic Cable (with a transmission capacity of +/–600 MW) was constructed in the early nineties to link the power systems of Germany and Sweden. To ensure optimum dynamic system operation the original plan was to connect the Herrenwyk HVDC converter station in Germany to the 380 kV grid. However, due to changes in the European power market, this connection was abandoned and the HVDC link was consequently connected to the 110 kV network in the Lübeck district, which is inadequately dimensioned in terms of necessary system impedance. Due to this and based on detailed network studies, E.ON decided to carry out several extensions in the northern German power network between 2003 and 2004. In conjunction with these extensions and considering the highly dynamic behaviour of the Herrenwyk HVDC converter station, E.ON Netz GmbH awarded a turnkey contract to Siemens to build a new SVC on the former site of the Lübeck-Siems power plant in November 2003, in order to ensure voltage quality in its northern 380 kV grid. The Thyristor Controlled Reactors had to be built indoors to fulfill very stringent requirements regarding noise emissions, using special noise damping materials and

Customer

E.ON Netz GmbH, Germany

System voltage

380 kV/50 Hz

Transformer

200 MVA

Operating range

+ 200 MVAr (capacitive) to – 100 MVAr (inductive)

Definition of SVC branch circuits

1 x TCR 1 x TSC 2 x Filters 380 kV, 50 Hz

CTSC 1 L TCR 1 2

L TSC 1

L1DTF L2DTF

C2DTF

LF1 L TCR 1 2 TCR 1

CF1

TSC 1

Filter 1

C1DTF

Filter 2

methods. The project also included the first-ever implementation (in an SVC) of the high-reliable control system based on SIMATIC TDC®, a proven industrial hardware design from Siemens. The SVC was successfully put into commercial operation only 12 months after the contract had been signed.

Lübeck

Poland Berlin

Netherlands Germany Belgium

Czech Rep. Luxembourg

17

Bom Jesus da Lapa The largest SVC in South America built in record construction time

This Static Var Compensator, located at the 500 kV Bom Jesus da Lapa II substation, maintains voltage stability over the 1100 km long 500 kV overhead transmission line between the Serra da Mesa substation and the Sapeaçu substation near Salvador in the northeast of the country. This large Siemens SVC with a control rating of 500 MVAr was built in the record time of only 12 months for the Italian Enelpower utility company to strengthen the eastwest grid interconnection in Brazil‘s northeast under the project name “Interligação Sudeste–Nordeste“. Similar to the solution for the Funil SVC, all electronic power components needed for compensation were installed in steel containers.

Technical Data Customer

Enelpower, Brazil

System voltage

500 kV/60 Hz

Transformer

4 x 83.3 MVA

Operating range

+ 250 MVAr (capacitive) to – 250 MVAr (inductive)

Definition of SVC branch circuits

2 x TCR 1 x TSC 2 x Filters

500 kV, 60 Hz

Since its commissioning in December 2002, the SVC at Bom Jesus da Lapa II substation has been stabilizing voltage and frequency across the grid, minimizing losses and responding swiftly and reliably to load changes. L TSC 1

CTSC 1

TSC 1

18

LF1

LF2

CF1

CF2

Filter 1

Filter 2

L TCR 1 2

L TCR 2 2

L TCR 1 2

L TCR 2 2

TCR 1

TCR 2

Impala, Illovo & Athene Voltage stability to ensure security of power supply

Richards Bay is a major industrial centre of the Republic of South Africa with aluminium smelter plants, paper mills and open-cast Mining, among others located in the region. With the main generation centres of the Transvaal over 200 km away, maintaining a stable and secure supply to this region is critical. In 1994 and 1995 Siemens successfully installed three Static Var Compensators for the South African Utility ESKOM (Electricity Supply Commission) at their 275 kV substations (Impala and Illovo) and at their newly built 400 kV substation Athene. The NATAL Static Var Compensators are designed for: ■ Fast dynamic network stabilization (voltage stabilisation) ■ Reduction of voltage unbalance ■ Reduction of network disturbances ■ Increasing of transmission capability ■ Control of external reactive-power devices

Technical Data Customer

ESKOM, South Africa

System voltage

275 kV/50 Hz; 400 kV/50 Hz

Transformer

4 x 66.7 MVA

Operating range

+ 100 MVAr (capacitive) to – 300 MVAr (inductive)

Definition of SVC branch circuits

2 x TCR 3 x Filters

275 kV/400 kV, 50 Hz

L TCR 1 2

L TCR 2 2

L TCR 1 2

L TCR 2 2

LF1

LF2

LF3

CF1

CF2

CF3

Filter 1 Filter 2 Filter 3

TCR 1

TCR 2

Harare Zimbabwe Namibia

Mozambique Botswana

Swaziland Johannesburg

Oran

ge

Transvaal Generation

South Africa

Illovo

Athene Impala Durban

Cape Town

19

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