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This example model can be found in the software under Protection > GHOST_ugrid_Protection.ecf".
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When executing in real-time, it is recommended to put "opgcc" in Settings – Target – Compiler and Linker.
Test Scenarios/Sequence of Events
The following sequence of events is applied by taking a data acquisition in the ScopeView 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 Simulation
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It can be seen in the figure below that the multi-relay block 307 corresponding to CB 07 of the feeder 3 which is immediate near to the fault, picks up at t = 10.21 s, and clears the fault.
It can be seen in the figure below that the faulted location is isolated from the rest of the network and the model operates stably.
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The protection scheme of the Circuit Breaker (CB) 03 connected close to the fault, detects this fault and responds. As per the relay settings mentioned, the 51P overcurrent protection element of multi-relay block 203 responds correctly and issues the Trip at time t = 27.91 s, thus isolating the fault as shown in the figure below. The . The fault also triggers the 27-Undervoltage element associated with multi-relay subsystems 214, 215, and 218 and thus opens the breakers 14, 15, and 18 after a set time delay of 2 s i.e. at t = 29 s.
It can be seen that the faulted location is isolated from the rest of the network and the model works stably.
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