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Figure 1: Synchronous machine configuration settings

Simulation and Results

Scenario 1: Three-phase fault on Bus 104

As part of the example model setup, the user can perform two types of scenarios. The first scenario is about introducing a three-phase fault on Bus 104 at 0.1s by 0.05s. This scenario gives the user an idea of reliability in power systems, and how it reacts after clearing a fault. The user can change these settings by going into the fault subsystem and changing the values of T1 and T2, configuring the fault activation and clear times, respectively.

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Figure 5: Machine terminal voltages with a three-phase to ground fault at Bus 104.

Scenario 2: Three-phase fault on Bus 119

The model is also equipped with a three-phase fault on Bus119. Similar to scenario 1, the default times for this fault are set to activate at 0.1s and clear 0.05s later. By default this fault is disabled and only the three-phase fault described in the previous scenario is enabled. To activate only this fault it is necessary to check the Enable option within the fault subsystem called Fault2 and also check the disable option within the fault subsystem called Fault1. 

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