real-time simulation of 3-level statcom with 72 switches topology opal-rt technologies montreal,...
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Real-Time Simulation of 3-Level Real-Time Simulation of 3-Level STATCOM With 72 Switches STATCOM With 72 Switches
TopologyTopology
OPAL-RT TECHNOLOGIESMontreal, Quebec, Canada
www.OPAL-RT.com
EMSRev. 001, October 20, 2008
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Contents
Test Objective Model Description Simulation Speed Performance Simulation Results Cross-
Validation Conclusions
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Test Objective
To evaluate the capacity of RT-LAB to real-time simulate the 3-Level STATCOM with 168 switches topology and verify the simulation accuracy
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Model Description
a 3-level STATCOM with 72 switches for the purpose of bus voltage stabilization
A simplified STATCOM schematic (72-switch)*extracted from ‘Operating performance of the STATCOM in the Kanzaki substation’, Cigre 2005, by H. Yonezawa, et al.
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Simulation Speed Performance
Offline simulation performance*.
*Test results are based on a computer of Intel Pentium®4 CPU 3.4GHz, 960 MB of RAM.
Simulation platform
Time StepSimulation
timeWall clock
time
Time factor (Wall clock time/
simulation time)
Reference Model
EMTP/RV 3s 1 s 542.1 s 542.1
Reference Model
EMTP/RV 50s 1 s 115.6 s 115.6
Model 1Simulink /SPS/RTlab
50us 1 s 6.1 s 6.1
Model 2Simulink /SPS/RTlab
50us 1 s 6.7 s 6.7
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Simulation Speed Performance
Real time simulation performance *.
*Test results are based on a real time simulator of Intel® Core TM2 Quad processors, 2.3GHz, 2GB of RAM .
CPU 1 CPU 2 CPU 3
No. of CPU
Time step
Minimum time step
Potential minimum
time factor
Model 1
The entire system
- - 1 50us 36s 0.72
Model 2
Rest of the
system
STATCOM groups 1
to 4
STATCOM groups 5
to 73 50us 20s 0.4
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Simulation Speed Performance
simulation speed (or computational power): the ratio of two time factors reference model in EMTP/RV with 50 us time step is taken as the
benchmark
Simulation Speed (Computational Power)
0.2
1.0
19.0 17.3
160.6289.0
0
1
10
100
1000
Ref. Model(3us)
EMTP/RV
Ref. Model(50us)
EMTP/RV
Model1(50us) Offline
Model2 (50us)Offline
Model1 (50us)RT simulator
Model2 (50us)RT simulator
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Simulation Results Cross- Validation
Reference model (3us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM voltage phase-A. (unit 104V, Red for Reference model at 3us, blue for Model 1 at 50 us, and green for voltage
reference).
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Simulation Results Cross- Validation
Reference model (3us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM current phase-A. (unit A, Red for Reference model at
3us, blue for Model 1 at 50 us).
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Simulation Results Cross- Validation
Reference model (3us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM dc current. (unit A, Red and blue for Reference model
at 3us, green and black for Model 1 at 50 us).
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Simulation Results Cross- Validation
Reference model (50us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM voltage phase-A. (unit 104V, Red for Reference model at 50us, blue for Model 1 at 50 us, and green for voltage
reference).
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Simulation Results Cross- Validation
Reference model (50us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM current phase-A. (unit A, Red for Reference model at
50us, blue for Model 1 at 50 us).
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Simulation Results Cross- Validation
Reference model (50us) in EMTP/RV VS. model 1(50 us) in Simulink/SPS/RTlab
STATCOM dc current. (unit A, Red and blue for Reference model
at 50us, green and black for Model 1 at 50 us).
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Conclusions
model with 50us time step in Simulink/SPS/RTlab has very high currency (an equivalent of 3us time step in EMTP/RV model)
simulation speed in the Simulink/SPS/RTlab platform is much faster than in EMTP/RV. Around 17 times faster for offline and 200 times
faster in RT simulator when at same 50us time step Or up to 1445 times faster with similar accuracy.
Minimum time steps of 36us and 20us in one and 3 cores respectively for real time simulation
the 3-level STATCOM with 168 switches topology is feasible on the RT-Lab platform