with SVC PLUS - Siemens

Mehr Spannungsqualität im Netz – 

mit SVC PLUS® 

Improvement in Voltage Quality for 

Power Systems –with SVC PLUS® 

M. Claus D. Retzmann K. Uecker A. Zenkner 

1 10-2009 

E T PS SL/Re 

Power Transmission Division

General Features of VSC* FACTS 

Grid Access for Wind Farms and Renewables 

Elimination of Voltage Fluctuations and Flicker 

High dynamic Performance 

Low Space Requirements 

VSC Technology makes it feasible 

SVC PLUS offers additional Benefits 

* VSC: Voltage-Sourced Converter 

2 10-2009 E T PS SL/Re 


SVC PLUS – a wide Range of 

Configuration Possibilities 

Up to 4 parallel L-Units: +/- 200 MVAr 

Containerized Solutions: 

SVC PLUS S: +/- 25 MVAr 

SVC PLUS M: +/- 35 MVAr 

SVC PLUS L: +/- 50 MVAr 

8 kV – 36 kV 

HV 

LV 

Open Rack Solution (Building): 

SVC PLUS C: +/-100 MVAr 

SVC PLUS Hybrid (Option): 

MSR (Mechanically Switched Reactors) 

MSC (Mechanically Switched Capacitors) 

SVC PLUS 

+/-25 ... +/ -200 MVAr 

MSR 

MSC 

3 10-2009 E T PS SL/Re 


SVC PLUS with MMC: a new Member of the 

FACTS Community – Modularity answering every Challenge 

System Voltage (kV) 

Reactive Power (MVAr) 

4 10-2009 E T PS SL/Re 


SVC PLUS – A View of the Technology 

Cooling System Converter Control & Protection 

5 10-2009 E T PS SL/Re 


SVC PLUS – a highly flexible System 

Low Generation of Harmonics 

Low Level of HF-Noise 

Low Switching Losses 

No Snubbers required 

Siemens uses MMC Technology 

(Modular Multilevel Converter) 

6 10-2009 

E T PS SL/Re 


The Evolution of SVC PLUS and VSC Technology 

Topologies: Two-Level Three-Level Multilevel 

GTO / IGCT 

IGBT in PP 

IGBT Module 

Power 

Electronic 

Devices: 

7 10-2009 

E T PS SL/Re 


SVC PLUS: HMI, local and remote Control 

Local: WinCC, PC 

Remote: SCADA Interface 

External Devices 

External Devices 


8 

10-2009 

E T PS SL/Re 


SVC PLUS: Converter, Control and Protection 

9 10-2009 

E T PS SL/Re 


SVC PLUS: Advanced Control System 

SIMATIC TDC 

• Plant Coordination 

• Reference Values 

• Measurements 

PLUSCONTROL 

• Current Control 

• Converter Coordination 

GIB on Power Module 

• Capacitor Protection 

• Piloting of IGBT Drivers 

• DC Voltage Measurement 

10 10-2009 

E T PS SL/Re 


Layout SVC PLUS L: +/- 50 MVAr 

21 m (69 feet) 

25 m (82 feet) 

11 10-2009 

E T PS SL/Re 


Layout SVC PLUS 2 x L: +/- 100 MVAr 

Dimensions in m 

12 10-2009 

E T PS SL/Re 


Layout SVC PLUS System, maximum Configuration 

4 SVC PLUS with 

4 external devices 

13 10-2009 

E T PS SL/Re 


Space Requirements – Example of +/- 50 MVAr: 

SVC PLUS L versus SVC “Classic” 

Space 

Saving 

14 10-2009 E T PS SL/Re 


SVC PLUS: Example of Factory 

Acceptance Tests – Nuremberg, Germany 

15 10-2009 E T PS SL/Re 


Single Line Diagram of SVC PLUS in 

Comparison with SVC “Classic“ 

SVC “Classic” 

SVC SVC PLUS 

Variable Impedance 

STATCOM = Static Synchronous 

Compensator – with Multilevel 

Controlled Voltage Source 

16 10-2009 E T PS SL/Re 


SVC PLUS – the Operation Principle 

VSC 

AC Equivalent 

L1 

i 1 

i 12 

L 

H 

v conv 12 

H 

Xfmrs, Lines 

Loads 

L2 

i 2 

i 23 

L 

H 

v conv 23 

H 

VSC = 

Electronic Generator 

for Reactive Power 

Voltage Stabilization 

L3 

i 3 

i 31 

L 

H 

v conv 31 

H 

17 10-2009 

E T PS SL/Re 


SVC PLUS – Modular Multilevel Converter 

Power Module 1 Power Module 2 Power Module 3 Power Module 4 Power Module n 

v conv 12 

SVC Voltage v 12 

Conv 12 

iconv 12 

v conv 12 

vL 

12 

18 10-2009 

E T PS SL/Re 


SVC PLUS: The Power Module 

IGBTs 

Bypass Switch 

DC Storage Capacitor 

GIB (Gate-Interface Board) 

19 10-2009 

E T PS SL/Re 


From Power Module to Converter – 

the Multilevel Voltage Generation 

v 

v 

Power Module 

with DC Capacitor 

20 10-2009 E T PS SL/Re 


States and Current Paths of a Power Module in 

the MMC Topology – an Advanced Solution 

“Off“ State 

Capacitor bypassed 

ON 

ON 

C 

u DC 

OFF 

OFF 

“On“ State 

Capacitor charging/discharging 

ON 

OFF 

+ V DC C 

V DC 

OFF 

ON 

21 10-2009 E T PS SL/Re 


Harmonics of SVC PLUS in 

Comparison with SVC “Classic” 

22 10-2009 E T PS SL/Re 


SVC PLUS: V/I Diagram – Current Source 

V prim (pu) 

1.5 

Jump next Page (SVC “Classic”) 

1.0 

0.5 

STATCOM: 

Current-Source 

Characteristics 

continous Operating 

Area of SVC PLUS 

time limited Operating 

Area of SVC PLUS 

-1.5 

-1.0 

Capacitive Current 

-0.5 

0 0.5 1.0 1.5 

I prim (pu) 

Inductive Current 

23 10-2009 

E T PS SL/Re 


SVC “Classic”: Examples of V/I Diagrams 

V SVC 

V SVC 

1.8 

Voltage 

Control 

Mode 

• w/o slope Slope 

• 

with 

with 

slope 

Slope 

Reactive 

Power 

Control 

Mode 

1.1 

1.0 

SVC: 

Impedance 


SVC: 

Impedance 


0.25 0.25 

I SVC (Q SVC ) 

I SVC 

24 10-2009 

E T PS SL/Re 


SVC PLUS versus SVC “Classic” – 

Loss Characteristics 


P in % 

1,5 

SVC Classic 

1,0 

0,5 

0,0 

-1 -0,5 0 0,5 Q in pu 1 

capacitive 

inductive 

25 10-2009 E T PS SL/Re 


SVC PLUS – Control Features 

SVC PLUS – Standard Control Functions 

• Voltage Control 

• Reactive Power Control 

• Control of up to 4 External Devices 

SVC PLUS –The Control Options 

• Power Oscillation Damping 

• Voltage Unbalance Control 

• Cos φ Control 

• Flicker Control 

SVC PLUS – Internal Controls 

• Adaptive Gain Control 

• DC Control 

• Transformer Overload Control 

• Over & Undervoltage Strategies 

26 10-2009 

E T PS SL/Re 


The Advanced SVC PLUS Solution 

8 Systems in 4 Transmission Projects: 

2009 - 2011 

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

Dynamic Voltage Support 

27 10-2009 

E T PS SL/Re 


Grid Access of Green Energy with SVC PLUS: 

Thanet, UK – 2 SVC PLUS Systems for 300 MW Wind Farm 

2009 

SVC PLUS: 

2 x ±35 MVAr in parallel 

132 kV / 13.9 kV 

28 10-2009 E T PS SL/Re 


Grid Access of Green Energy with SVC PLUS: 

Greater Gabbard, UK – 3 SVC PLUS Systems 



132 kV / 13.9 kV 

2011 

World’s largest Offshore Wind Farm 

29 10-2009 E T PS SL/Re 


Power Quality in AC Systems 

2 SVC PLUS Systems – Kikiwa Project, South Island, New Zealand 



220 kV / 11 kV 

Dynamic Voltage Support 

during and after AC Line Faults 

(Voltage Dip Compensation) 

2009 

30 10-2009 E T PS SL/Re 


Power Quality in AC Systems 

SVC PLUS – Mocuba Substation, Nampula, Mozambique 

2010 


±35 MVAr 

33 kV 

Dynamic Voltage Stabilization 

Reactive Power Control 

31 10-2009 E T PS SL/Re 


Power Quality for Industrial Systems 

SVC PLUS, ThyssenKrupp, Mobile County, Alabama, USA 

SVC PLUS for new Steel Plant 

±100 MVAr 

Open Rack Solution 

Flicker Compensation 

2010 

32 10-2009 E T PS SL/Re 


Benefits of Innovations: 

Siemens uses SVC PLUS Technology 

also for Traction Supply Converters 

33 10-2009 

E T PS SL/Re 


Intelligent Solutions for Power Transmission 

with FACTS & 

HVDC from 

Now available – 

with VSC PLUS 

Technology 

Siemens 

HVDC PLUS 

and SVC PLUS 

… and the Lights 

will keep shining ! 

34 10-2009 E T PS SL/Re 


Intelligent Solutions for Power Transmission 

Sustainability & 

Security 

of 

Supply 

Thank You for 

your Attention ! 

35 10-2009 E T PS SL/Re

with SVC PLUS - Siemens

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