1 10-2009 Power Transmission DivisionE T PS SL/Re1 Power Transmission DivisionE T PS SL/Re10-2009
Mehr Spannungsqualität im Netz –
mit SVC PLUS®
Improvement in Voltage Quality for
Power Systems – with SVC PLUS®
K. UeckerD. RetzmannM. Claus A. Zenkner
2 10-2009 Power Transmission DivisionE T PS SL/Re
General Features of VSC* FACTS
2 E T PS SL/Re10-2009 Power Transmission Division
Grid Access for Wind Farms and Renewables
Elimination of Voltage Fluctuations and Flicker
Low Space Requirements
VSC Technology makes it feasible
High dynamic Performance
* VSC: Voltage-Sourced Converter
SVC PLUS offers additional Benefits
3 10-2009 Power Transmission DivisionE T PS SL/Re
SVC PLUS – a wide Range of Configuration Possibilities
3 Power Transmission Division10-2009 E T PS SL/Re
Containerized Solutions:SVC PLUS S: +/- 25 MVArSVC PLUS M: +/- 35 MVArSVC PLUS L: +/- 50 MVAr
Open Rack Solution (Building):SVC PLUS C: +/-100 MVAr
SVC PLUS Hybrid (Option):MSR (Mechanically Switched Reactors)
MSC (Mechanically Switched Capacitors)
HV
LV
MSR MSC
8 kV – 36 kV
SVC PLUS+/-25 ... +/ -200 MVAr
Up to 4 parallel L-Units: +/- 200 MVAr
4 10-2009 Power Transmission DivisionE T PS SL/Re
SVC PLUS with MMC: a new Member of theFACTS Community – Modularity answering every Challenge
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System Voltage (kV)
Reactive Power (MVAr)
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SVC PLUS – A View of the Technology
Cooling System Converter Control & Protection
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SVC PLUS – a highly flexible System
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Siemens uses MMC Technology(Modular Multilevel Converter)
Low Generation of Harmonics
Low Level of HF-Noise
Low Switching Losses
No Snubbers required
7 10-2009 Power Transmission DivisionE T PS SL/Re
The Evolution of SVC PLUS and VSC Technology
7 Power Transmission Division
Power Electronic Devices:
IGBT in PP IGBT ModuleGTO / IGCT
E T PS SL/Re10-2009
Topologies: Two-Level Three-Level Multilevel
8 10-2009 Power Transmission DivisionE T PS SL/Re
SVC PLUS: HMI, local and remote Control
Power Transmission DivisionE T PS SL/Re10-2009
Local: WinCC, PC
Remote: SCADA Interface
8
External Devices
SVC PLUS
External Devices
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SVC PLUS: Converter, Control and Protection
Power Transmission Division9 E T PS SL/Re10-2009
10 10-2009 Power Transmission DivisionE T PS SL/Re
SVC PLUS: Advanced Control System
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SIMATIC TDCPlant CoordinationReference ValuesMeasurements
PLUSCONTROLCurrent ControlConverter Coordination
GIB on Power ModuleCapacitor ProtectionPiloting of IGBT DriversDC Voltage Measurement
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Layout SVC PLUS L: +/- 50 MVAr
11 Power Transmission DivisionE T PS SL/Re10-2009
21 m
(69
feet
)
25 m (82 feet)
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Layout SVC PLUS 2 x L: +/- 100 MVAr
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Dimensions in m
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Layout SVC PLUS System, maximum Configuration
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4 SVC PLUS with4 external devices
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Space Requirements – Example of +/- 50 MVAr:SVC PLUS L versus SVC “Classic”
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Space Saving
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SVC PLUS: Example of Factory Acceptance Tests – Nuremberg, Germany
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16 10-2009 Power Transmission DivisionE T PS SL/Re
Single Line Diagram of SVC PLUS in Comparison with SVC “Classic“
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SVC PLUSSVC PLUSSVC “Classic”SVC “Classic” SVC PLUSSVC “Classic”
Variable Impedance Controlled Voltage Source
STATCOM = Static Synchronous Compensator – with Multilevel
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SVC PLUS – the Operation Principle
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H H
H H
H H
L1
L2
L3
vconv 12
vconv 23
vconv 31
i12
i23
i31
i1
i2
i3
L
L
L
AC Equivalent
Xfmrs, Lines Loads
VSC
Electronic Generatorfor Reactive PowerVSC =
Voltage Stabilization
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Power Module 1 Power Module 2 Power Module 3 Power Module 4 Power Module n
vconv 12
Lv 12conv 12v
iconv 12
SVC PLUS – Modular Multilevel Converter
Conv 12Conv 12
SVC Voltage v12
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SVC PLUS: The Power Module
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IGBTs
Bypass Switch
GIB (Gate-Interface Board)
DC Storage Capacitor
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From Power Module to Converter –the Multilevel Voltage Generation
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Power Module with DC Capacitor
vv
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States and Current Paths of a Power Module in the MMC Topology – an Advanced Solution
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ON ON
OFF OFF
C uDC
ON OFF
OFF ON
C VDC+ VDC
Capacitor charging/discharging
Capacitor bypassed“Off“ State
“On“ State
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Harmonics of SVC PLUS in Comparison with SVC “Classic”
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23 10-2009 Power Transmission DivisionE T PS SL/Re
SVC PLUS: V/I Diagram – Current Source
23 Power Transmission DivisionE T PS SL/Re10-2009
Iprim(pu)
Vprim(pu)
0 0.5 1.0 1.5-0.5-1.0-1.5
0.5
1.0
1.5
continous Operating Area of SVC PLUS
time limited Operating Area of SVC PLUS
Capacitive Current Inductive Current
STATCOM:Current-SourceCharacteristics
Jump next Page (SVC “Classic”)
24 10-2009 Power Transmission DivisionE T PS SL/Re
SVC “Classic”: Examples of V/I Diagrams
ISVC (QSVC)
VSVC
24 Power Transmission DivisionE T PS SL/Re10-2009
1.0
Voltage Control Mode
• w/o slope
• with slope
• w/o Slope• with Slope
Reactive Power Control Mode
1.8
1.1
VSVC
ISVC
SVC: Impedance Characteristics
SVC: Impedance Characteristics
SVC: Impedance Characteristics
SVC: Impedance Characteristics
0.25 0.25
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SVC PLUS versus SVC “Classic” –Loss Characteristics
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0,0
0,5
1,0
1,5
-1 -0,5 0 0,5 1Q in pu
P in
%
SVC PLUS SVC Classic
capacitive inductive
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SVC PLUS – Control Features
26 Power Transmission DivisionE T PS SL/Re10-2009
SVC PLUS – Standard Control FunctionsVoltage ControlReactive Power Control Control of up to 4 External Devices
SVC PLUS – The Control OptionsPower Oscillation DampingVoltage Unbalance ControlCos φ ControlFlicker Control
SVC PLUS – Internal ControlsAdaptive Gain ControlDC ControlTransformer Overload ControlOver & Undervoltage Strategies
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The Advanced SVC PLUS Solution
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Source: UCTE Interim Report 10-27-2003Rating: up to +/- 200 MVAr
8 Systems in 4 Transmission Projects:
Dynamic Voltage Support
2009 - 2011
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Grid Access of Green Energy with SVC PLUS:Thanet, UK – 2 SVC PLUS Systems for 300 MW Wind Farm
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SVC PLUS:2 x ±35 MVAr in parallel132 kV / 13.9 kV
2009
29 10-2009 Power Transmission DivisionE T PS SL/Re
Grid Access of Green Energy with SVC PLUS:Greater Gabbard, UK – 3 SVC PLUS Systems
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SVC PLUS:3 x ±50 MVAr in parallel132 kV / 13.9 kV
Power Transmission Division
World’s largest Offshore Wind Farm
2011
30 10-2009 Power Transmission DivisionE T PS SL/Re
Power Quality in AC Systems 2 SVC PLUS Systems – Kikiwa Project, South Island, New Zealand
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SVC PLUS:2 x ±35 MVAr in parallel220 kV / 11 kVDynamic Voltage Support during and after AC Line Faults(Voltage Dip Compensation)
2009
31 10-2009 Power Transmission DivisionE T PS SL/Re
Power Quality in AC Systems SVC PLUS – Mocuba Substation, Nampula, Mozambique
31 Power Transmission Division10-2009 E T PS SL/Re
SVC PLUS:±35 MVAr33 kVDynamic Voltage Stabilization Reactive Power Control
2010
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Power Quality for Industrial Systems SVC PLUS, ThyssenKrupp, Mobile County, Alabama, USA
Power Transmission Division32 10-2009 E T PS SL/Re
SVC PLUS for new Steel Plant±100 MVArOpen Rack SolutionFlicker Compensation
2010
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Benefits of Innovations:
Power Transmission DivisionE T PS SL/Re10-2009
Siemens uses SVC PLUS Technologyalso for Traction Supply Converters
34 10-2009 Power Transmission DivisionE T PS SL/Re
Intelligent Solutions for Power Transmission
with with FACTSFACTS & &
HVDCHVDC fromfrom
HVDC HVDC PLUSPLUSandand SVCSVC PLUSPLUS
Now available –with VSC PLUS Technology
SiemensSiemens
… and the Lights will keep shining !
35 10-2009 Power Transmission DivisionE T PS SL/Re
Intelligent Solutions for Power Transmission
SustainabilitySustainability &&
SecuritySecurity
Thank You for your Attention !
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