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This example model can be found in the software under Distribution and Industrial Power Systems > GHOST_Microgrid.ecf".
Description
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When executing in real-time, it is recommended to put "opgcc" in Settings – Target – Compiler and Linker. The model currently works only on Redhat and OPRTLinux targets.
Test Scenarios/Sequence of Events
The following sequence of events are applied by loading "GHOST_Microgrid.svt" in ScopeView and starting a data acquisition with Sync and Trigger options checked:
The simulation starts with all the DERs connected to the grid. The active and reactive power setpoints of the DERs connected at different feeders are tabulated as below:
Power References of DERs at Start of SimulationFeeder
Type of DER
Active Power (pu)
Reactive Power (pu)
Feeder 1
DG
0.8
0.5
Feeder 2
BESS
0.8
0.2
PV
1
0
Feeder 3
CHP
0.8
0.4
Feeder 4
BESS
0.8
0.1
DG
0.6
0.1
PV
0.6
0
- At t = 40 s, the active power of PV at feeder 4 is increased from 0.2 pu to 0.8 pu in steps of 0.15 pu/2 s emulating an increase in the solar irradiance. This is similar to the power increasing from morning to noon.
- At t = 59.96 s, a three-phase to ground (LLL-G) fault occurred at the grid side for a duration of 60ms.
- At t = 60 s, the PCC breakers of the feeders 1-3 open to isolate from the fault. This results in each feeder forming an islanded microgrid respectively: Feeder 1 island with the Diesel generator assuming the grid forming mode (voltage at 1pu and frequency at 60Hz); Feeder 2 island with BESS assuming the grid forming mode; Feeder 3 island with the CHP generator assuming the grid forming mode.
- At t = 65 s, an interruptible load of 600 kVA connected at Feeder 3 is disconnected to bring the CHP active power within 1p.u and to maintain the generation-load balance in the microgrid.
Results
The figures below show the results of the model under various scenarios.
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