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
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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
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Power Transmission Division
SVC PLUS – a wide Range of
Configuration Possibilities
Up to 4 parallel L-Units: +/- 200 MVAr
Containerized Solutions:
SVC PLUS S: +/- 25 MVAr
HV
SVC PLUS M: +/- 35 MVAr
SVC PLUS L: +/- 50 MVAr
8 kV – 36 kV
LV
Open Rack Solution (Building):
SVC PLUS C: +/-100 MVAr
SVC PLUS Hybrid (Option):
MSR (Mechanically Switched Reactors)
MSC (Mechanically Switched Capacitors)
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SVC PLUS
+/-25 ... +/ -200 MVAr
MSR
MSC
Power Transmission Division
SVC PLUS with MMC: a new Member of the
FACTS Community – Modularity answering every Challenge
System Voltage (kV)
Reactive Power (MVAr)
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Power Transmission Division
SVC PLUS – A View of the Technology
Cooling System
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10-2009
Converter
E T PS SL/Re
Control & Protection
Power Transmission Division
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)
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Power Transmission Division
The Evolution of SVC PLUS and VSC Technology
Topologies: Two-Level
GTO / IGCT
Three-Level
IGBT in PP
Multilevel
IGBT Module
Power
Electronic
Devices:
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Power Transmission Division
SVC PLUS: HMI, local and remote Control
Local: WinCC, PC
Remote: SCADA Interface
External Devices
External Devices
SVC PLUS
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Power Transmission Division
SVC PLUS: Converter, Control and Protection
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Power Transmission Division
SVC PLUS: Advanced Control System
SIMATIC TDC
ƒ Plant Coordination
ƒ Reference Values
ƒ Measurements
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10-2009
PLUSCONTROL
ƒ Current Control
ƒ Converter Coordination
E T PS SL/Re
GIB on Power Module
ƒ Capacitor Protection
ƒ Piloting of IGBT Drivers
ƒ DC Voltage Measurement
Power Transmission Division
21 m
(69 feet)
Layout SVC PLUS L: +/- 50 MVAr
25 m (82 feet)
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Power Transmission Division
Layout SVC PLUS 2 x L: +/- 100 MVAr
Dimensions in m
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Power Transmission Division
Layout SVC PLUS System, maximum Configuration
4 SVC PLUS with
4 external devices
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Power Transmission Division
Space Requirements – Example of +/- 50 MVAr:
SVC PLUS L versus SVC “Classic”
Space
Saving
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Power Transmission Division
SVC PLUS: Example of Factory
Acceptance Tests – Nuremberg, Germany
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Power Transmission Division
Single Line Diagram of SVC PLUS in
Comparison with SVC “Classic“
SVC
SVC“Classic”
“Classic”
STATCOM = Static Synchronous
Compensator – with Multilevel
Controlled Voltage Source
Variable Impedance
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SVC
PLUS
SVC
PLUS
E T PS SL/Re
Power Transmission Division
SVC PLUS – the Operation Principle
VSC
L1
AC Equivalent
Loads
Generator
VSC = Electronic
for Reactive Power
10-2009
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vconv 12
L
L3
i3
H
H
i23
H
vconv 23
H
i31
L
Voltage Stabilization
17
H
i12
L
L2
Xfmrs, Lines
i1
H
vconv 31
Power Transmission Division
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 v12
i conv 12
Conv
Conv12
12
vconv 12
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vL12
E T PS SL/Re
Power Transmission Division
SVC PLUS: The Power Module
IGBTs
Bypass Switch
DC Storage Capacitor
GIB (Gate-Interface Board)
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Power Transmission Division
From Power Module to Converter –
the Multilevel Voltage Generation
v
v
Power Module
with DC Capacitor
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Power Transmission Division
States and Current Paths of a Power Module in
the MMC Topology – an Advanced Solution
“Off“ State
ON
ON
C
OFF
Capacitor charging/discharging
OFF
+ VDC
C
OFF
21
uDC
OFF
“On“ State
ON
Capacitor bypassed
VDC
ON
10-2009
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Power Transmission Division
Harmonics of SVC PLUS in
Comparison with SVC “Classic”
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Power Transmission Division
SVC PLUS: V/I Diagram – Current Source
Vprim(pu)
1.5
1.0
STATCOM:
Current-Source
Characteristics
0.5
continous Operating
Area of SVC PLUS
time limited Operating
Area of SVC PLUS
Jump next Page (SVC “Classic”)
-1.5
-1.0
-0.5
0
Iprim(pu)
Capacitive Current
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10-2009
0.5
1.0
1.5
Inductive Current
E T PS SL/Re
Power Transmission Division
SVC “Classic”: Examples of V/I Diagrams
VSVC
Voltage
Control
Mode
w/o slope
Slope
•• w/o
with slope
Slope
•• with
VSVC
1.8
Reactive
Power
Control
Mode
1.1
1.0
SVC:
Impedance
SVC:
Characteristics
Impedance
Characteristics
0.25
0.25
ISVC (QSVC)
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ISVC
Power Transmission Division
SVC PLUS versus SVC “Classic” –
Loss Characteristics
SVC PLUS
SVC Classic
P in %
1,5
1,0
0,5
0,0
-1
capacitive
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10-2009
-0,5
0
0,5
Q in pu 1
inductive
E T PS SL/Re
Power Transmission Division
SVC PLUS – Control Features
SVC PLUS – Standard Control Functions
ƒ Voltage Control
ƒ Reactive Power Control
ƒ Control of up to 4 External Devices
SVC PLUS – The Control Options
ƒ Power Oscillation Damping
ƒ Voltage Unbalance Control
ƒ Cos φ Control
ƒ Flicker Control
SVC PLUS – Internal Controls
ƒ Adaptive Gain Control
ƒ DC Control
ƒ Transformer Overload Control
ƒ Over & Undervoltage Strategies
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Power Transmission Division
The Advanced SVC PLUS Solution
2009 - 2011
8 Systems in 4 Transmission Projects:
Source: UCTE
10-27-2003
Rating:
upInterim
to +/-Report
200 MVAr
Dynamic Voltage Support
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Power Transmission Division
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
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Power Transmission Division
Grid Access of Green Energy with SVC PLUS:
Greater Gabbard, UK – 3 SVC PLUS Systems
SVC PLUS:
 3 x ±50 MVAr in parallel
 132 kV / 13.9 kV
2011
World’s largest Offshore Wind Farm
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Power Transmission Division
Power Quality in AC Systems
2 SVC PLUS Systems – Kikiwa Project, South Island, New Zealand
SVC PLUS:
 2 x ±35 MVAr in parallel
 220 kV / 11 kV
2009
 Dynamic Voltage Support
during and after AC Line Faults
(Voltage Dip Compensation)
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Power Transmission Division
Power Quality in AC Systems
SVC PLUS – Mocuba Substation, Nampula, Mozambique
2010
SVC PLUS:
 ±35 MVAr
 33 kV
 Dynamic Voltage Stabilization
 Reactive Power Control
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Power Transmission Division
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
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Power Transmission Division
Benefits of Innovations:
Siemens uses SVC PLUS Technology
also for Traction Supply Converters
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10-2009
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Power Transmission Division
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 !
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10-2009
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Power Transmission Division
Intelligent Solutions for Power Transmission
Sustainability &
Security of
Supply
Thank You for
your Attention !
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10-2009
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Power Transmission Division