At full load, the line in Problem 5.16 delivers \(1500 \mathrm{MVA}\) at \(480 \mathrm{kV}\) to the receiving-end load. Calculate the sending-end voltage and percent voltage regulation when the receiving-end power factor is

(a) 0.9 lagging,

(b) unity, 

(c) 0.9 leading.

 Problem 5.16

The \(500-\mathrm{kV}, 60-\mathrm{Hz}\), three-phase line in Problems 4.20 and 4.41 has a 300-km length.