An IS-km, 60-Hz, single-circuit, three-phase line is composed of Partridge conductors equilaterally spaced with 1 .6 m between centers. The line delivers 2500 kW at 11 kV to a balanced load. Assume a wire temperature of 5C.
(a) Determine the per-phase series impedance of the line.
(b) What must be the sending-end voltage when the power factor is
(j) 80% lagging,
(ii) unity,
(iii) 90% leading?
(c) Determine the percent regulation of the line at the above power factors.
(d) Draw phasor diagrams depicting the operation of the line in each case.