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A feeder having an impedance of 1.0+j3.2ohms is connected to the primary side of a step-down...

A feeder having an impedance of 1.0+j3.2ohms is connected to the primary side of a step-down three phase transformer rated at 132:22KV, 200MVA and that has a series reactance of 0.14pu. The transformer supplies a load of 190MVA with a 0.90 lagging power factor at rated voltage.

a) Caculate the per unit impedance of the feeder and the per unit load current. Use the transformer ratings as base values.

b) Calculate the voltage at the sending end of the feeder in per unit and KVLine-Line

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