A 212 kV, three phase transmission line is 40 km long. The resistance per phase is 0.15? per km and the inductance per phase is 1.3263 mH per km. Find the voltage and power at the sending end and the voltage regulation and efficiency when the line is supplying a three phase load of 312 MVA at 212 kV at i) 0.8 power factor lagging, and ii) 0.8 power factor leading.

answer:

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