Using per-unit calculations, rework Problem 5.18 to determine the sending-end voltage and current.

Problem 5.18

A \(60-\mathrm{Hz}, 230-\) mile, three-phase overhead transmission line has a series impedance \(z=0.8431 \angle 79.04^{\circ} \Omega / \mathrm{mi}\) and a shunt admittance \(\gamma=5.105 \times\) \(10^{-6} / 90^{\circ} \mathrm{S} / \mathrm{mi}\). The load at the receiving end is \(125 \mathrm{MW}\) at unity power factor and at \(215 \mathrm{kV}\). Determine the voltage, current, and both real and reactive power at the sending end and the percent voltage regulation of the line. Also find the wavelength and velocity of propagation of the line.