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All the machines of the generation system are controlled by internal exciters, governors (speed regulators), and stabilizers. The user can change this configuration by double-clicking on the machine subsystem and changing the values in the mask. The following is a snapshot of the machine configuration:
Figure 1: Synchronous machine configuration settings
Simulation and Results
As part of the example model setup, the user can perform one scenario. The user can enable or disable two three-phase faults on different model buses.
Scenario 1: Three-phase fault on Buses 7
The first scenario is about introducing a three-phase fault on Bus 7 at 0.1s by 0.1s. 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. . By default only this fault is enabled, it is necessary to check the Enable option within the fault subsystem called Flt_B7 and also check the disable option within the faults subsystem called Flt_B9.
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Figure 5: Machine speed and voltages with a three-phase to-ground fault at Bus 7.
Scenario 2: Three-phase fault on Bus 9
The model is also equipped with a three-phase fault on Bus 9. Similar to scenario 1, the default times for this fault are set to activate at 0.1s and clear 0.1s later. By default this fault is disabled and only the three-phase Flt_B7 described in scenario 1 is enabled. To activate only this fault it is necessary to check the Enable option within the fault subsystem called Flt_B9 and also check the disable option within the faults subsystem called Flt_B7.
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