The 100 k m , 230 k V , 60 H z 100 k m , 230 k V ,

The $100-km,230-kV,60-Hz$, three-phase line in Problems 4.18 and 4.39 delivers $300MVA$ at $218kV$ to the receiving end at full load. Using the nominal $\pi$ circuit, calculate the $ABCD$ parameters, sending-end voltage, and percent voltage regulation when the receiving-end power factor is

(a) 0.9 lagging,

(b) unity, 

(c) 0.9 leading. Assume a ${50}^{\circ }C$ conductor temperature to determine the resistance of this line.

Problem 4.18

A $230-kV,60-Hz$, three-phase completely transposed overhead line has one ACSR $954kcmil$ conductor per phase and flat horizontal phase spacing, with $7m$ between adjacent conductors. Determine the inductance in $H/m$ and the inductive reactance in $\Omega /km$.

Problem 4.39

Calculate the capacitance-to-neutral in $F/m$ and the admittance-to-neutral in $S/km$ for the three-phase line in Problem 4.18. Also calculate the linecharging current in $kA/$ phase if the line is $110km$ in length and is operated at $230kV$. Neglect the effect of the earth plane.