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A 50-Hz, 30-mile 3-phase transmission line delivers 20MW at 400 kV, 0.85 pf lead. If the...

A 50-Hz, 30-mile 3-phase transmission line delivers 20MW at 400 kV, 0.85 pf lead. If the line resistance and reactance are 20Ω and 140Ω respectively, determine the active power loss in kW.

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Answer #1

The active power losses in transmission line is happened due to the presence of line resistance. It is also known as Copper loss in transmission line.

The detailed solution of given question is

3 34-36-A NOTE

so, for 3-phase system, the total active losses = 3*23.068 = 69.204kW

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