A generator of a large power plant delivers an electric power of 130 MW at 22 kV

Question

A generator of a large power plant delivers an electric power of 130 MW at 22 kV AC. For transmission, this power is stepped up to 500 kV by a transformer. What is the rms current delivered by the generator? What is the rms current in the transmission line? By what factor the losses in the transmission line (on Joule heating) are reduced by using a transformer? Assume that the transformer is ideal and does not waste any power, and that transmission line is a purely resistive load (has no capacitance or inductance).

Explanation / Answer

a)I=P/V=130*10^6/(500*10^3) =260 A b)

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