5.2 A 200-km, 230-kV, 60-Hz, three-phase line has a positive-sequence series impedance z = 0.08 + j 0.48 Q/km and a positive-sequence shunt admittance y = j 3.33 × 10-6

S/km. At full load, the line delivers 250 MW at 0.99 p.f. lagging and at 220 kV. Using the nominal TT circuit, calculate: (a) the ABCD parameters, (b) the sending-end voltage and current, and (c) the percent voltage regulation.