Examples
- IEEE 9 Bus
One line diagram of the IEEE 9 Bus system
In the following two test cases, only the bus 5 and the connected load are modeled in PSCAD as the detailed system, while the remainder of the system are represented as the external system.
Two PSCAD project files for the test cases and the IEEE 9 bus sytem data are provided along with the tool release, and they are available from https://github.com/OpenHybridSim/OHM-release/tree/master/Test%20cases
The data is of PSS/E V30 format.
1)CASE-1： Three-phase balanced application (only the positive sequence data is required) NOTE: This test case is corresponding to the PSCAD project file "IEEE9_bus5_positive.pscx".
step-1： import data and build positive sequence Thevenin equivalent for the external system
Select the equivalent type, identify interface branches and the side of the detailed system
Build the external network equivalent through "simulation->build equivalent"
The equivalent data is output in a csv file:
NOTE：The output Thevenin equivalent impedance(s) is in pu, need to be converted to an appropriate unit format for input in PSCAD
step-2: model the detailed system, including the external system equivalent, in PSCAD
create the corresponding Thevenin voltage signals:
step-3: run PSCAD simulation without fault and check the initialization result
step-4: create an instance of the PSCAD Socket component and configure the setting.
step-5: create the FFT component for extracting the sequence interface current injections using
step-6: start hybrid simulation on OpenHybridSim side and run EMT simulation immediately
Simulation results of PSCAD:
Output the TS simulation results:
2)CASE-2： Single line to ground fault with three-phase/three-sequence network equivalents
The test case is corresponding to the PSCAD project file "IEEE9_bus5_3P.pscx"
- IEEE 39 Bus with a HVDC link