3. Real-time Transient Stability Simulator
3
Power system under study Nominal frequency
Positive sequence transmission
3-phase distribution
Time-step Fixed (typically few ms)
4. 4
Cover the complete spectrum of power system analysis & studies
ePOWERgrid Product Family
ePHASORsim
Real-Time Transient
Stability Simulator
10 ms time step
NEW
HYPERsim
Large Scale Power System
Simulation for Utilities & Manufacturers
10 µs to 100 µs time step
NEW
eFPGAsim
Power Electronics Simulation on FPGA
1 µs to 100 ns time step
NEW
1 s
(1 Hz)
10,000
5000
2500
1000
100
10
0
10 ms
(100 Hz)
50 µs
(20 KHz)
10 µs
(100 KHz)
1µs
(1 MHz)
100 ns
(10 MHz)
10 ns
(100 MHz)
20,000
Period (frequency) of transient phenomena simulated
Number of
Nodes
eMEGAsim
Power System & Power Electronics Simulation
Based on Matlab/Simulink and SimPowerSystem
7 µs to 100 µs time step
5. 5
Applications of ePHASORsim
ePHASORsim
for Large-Scale
Power Systems
UDM
Simulation
Hardware-
In-the-Loop
Parallel
Processing
Distribution
Systems
Test
SCADA
Systems
Operator
Training
Simulator
Transient
Stability
Real-time
Simulation
8. 8
ePHASORsim vs SPS Phasor mode
Features ePHASORsim SPS with Phasor option
Circuit editor Excel spreadsheet or PSS/e v.32 files SPS circuit editor
Interface with external devices Using Simulink Using Simulink
Transmission system Yes Yes
Unbalanced system Yes Yes
Supported components Fundamental models A comprehensive library
Largest system size tested 20k bus, 5k machine 200bus, 28 machine
Compilation time with
eMEGAsim for largest system
45 s 32m:42s
Load time with eMEGAsim less than 5 seconds few seconds
Number of CPU cores 1 9
Just opening the model in
Matlab (offline)
Normal 4 mins
Facility to split the system Not implemented yet, but there is no
limitation
There must be long lines, or a
transformer with stub-line. It needs
compensation. SSN blocks do not
work in SPS Phasor mode
Manual change of parameters
during simulation
All parameters are accessible There are limitations
9. 9
Performance of ePHASORsim
Simulation time: 10s, time-step: 10ms
Number of CPU cores: 1
Case 1 Case 2 Case 3
Number of
components
Buses 4992 9984 19968
Generators 1280 2560 5120
Controllers 2304 4610 9216
Others 9144 18368 36820
Computation
time (ms)
Normal 1.62 3.28 6.68
Disturbance 3.49 7.43 16.61
Overruns NO NO YES
10. 1. Large-scale power systems in Real-time
• 10,000 buses on-fly
2. Open and scalable hardware platform
• Integrated with a chassis equipped with FPGA and I/Os
• Interfaced with communication protocols such as IEC61850,
DNP3 (+-10ms), C37.118, OPC (+-100ms)
3. Test automation platform
• Perform test automation using Python scripts
• Use ScopeView to record, display and analyze results
• Interfaced with LabView to implement realistic control panels
• Modify parameters while the simulation is running
Features
11. 4. Third-party connectivity
• Interfaced with Simulink, SimPowerSystems and SimScape to
enable users to develop their own load, control and protection
models
• Interface with the Excel™ spreadsheet and with PTI’s PSS/e to
import the network data files
Features
14. 0 (No External PSS)
1 (External PSS)
0 (UDM PSS)
1 (SPS PSS)
1
Out1
Line Out/In
Load Out/In
Bus Fault
Vref
M
area1
2(s+1)
(s+2)
Zero-Pole1
s
(s+0.10)
Zero-Pole
speed
Goto2
ExternalDevice PSSmodel
In Vstab
Generic
Power System Stabilizer
2
Gain
speed
ExternalDevice
ExternalDevice
PSSmodel
0
External PSS Type
1
External PSS
0
Constant2
0
Constant1
<speed>
ePHASORsim and UDM with SPS blocks
15. ePHASORsim with PMUs and PDC
Live demo:
Quebec transmission system
Size of system
Bus 38
Machine 7
Exciter 7
Stabilizer 7
Turbine-governor 7
Line 19
Transformer 9
Series Capacitor 13
PMU 10
16. Timeline
2010
Project started
2011
First demo (HQ), simulation for
operator training
Distribution system components added
1st client delivery (GE-DTE)
2012
2013
API for externally coded modules
Standalone ePHASORsim,
integrated with new I/O server2014
Parallel ePHASORsim
New components
17. The future
• Several topics have been identified as important, but
require further analysis:
– GUI
– Import from / export to other formats (e.g. CIM)
– Interface with other software (e.g. ETAP)
– HYPERSIM integration
– Mixed-mode simulations (EMT + Phasor)
18. Conclusion
• ePHASORsim is a phasor-mode, real-time simulator of
large-scale transmission and distribution systems
• high performance
• flexible
• extensible
• We demonstrated the advantages of ePHASORsim in
various scenarios:
– External control prototyping
– Test SCADA system
– Hybrid simulation
– and more
19. ePHASORsim with PMUs and PDC
Live demo:
Quebec transmission system
Size of system
Bus 38
Machine 7
Exciter 7
Stabilizer 7
Turbine-governor 7
Line 19
Transformer 9
Series Capacitor 13
PMU 10
20. Models
Generator, Voltage source
Load (ZIP)
Transmission line
Excitation system
Power System Stabilizer
Turbine-Governor
Transformer (with Tap-Changer)
Reactor
Capacitor banks
External Simulink Blocks
(UDM)
External SPS Controller Blocks
ePHASORsim Library
Events and Actions
Balanced and unbalanced faults
Open-connector conditions
Transmission line trip
Faults on transmission line
section
Generator outage
Load shedding/restoration
Tap-changer adjustment
AVR adjustment
Reclosing commands
Loss of excitation
…
