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Question

A transmission line has 0.1 pu impedance on a base of 132 kV, 100 MVA. The pu impedance on a base of 220 kV, 50 MVA is ____pu.
  1. 0.018

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Solution

The correct option is A 0.018
Xpu(new)Xpu(old)=(MVA)new(MVA)old×(kV)2old(kV)2new

Xpu0.1=50100×(132220)2

Xpu=0.018pu

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