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The positive, negative and zero-sequence reactances of a 20-MVA, 13.2 kV synchronous generator are 0.3 pu,...

The positive, negative and zero-sequence reactances of a 20-MVA, 13.2 kV synchronous generator are 0.3 pu, 0.2 pu, and 0.1 pu respectively. The generator is solidly grounded and is not loaded. If a double line-to-ground fault occurs at the generator terminals, calculate: (i) The fault current (ii) The line voltages (iii) Explain the steps that was carried out in the sequence voltage changes at all buses of the system. (Do include explanations and analysis of your solutions such as use of diagrammatical connection for the hypothetical stubs or of the Thevenin equivalents of the sequence networks for the double line-to-ground fault.)

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