A three-phase transmission line is 80 mile long and serves a load of 250 MW at 220 KV and 0.8 power factor lagging. The A, B, C, D constants for the line in each phase are:
A=D=0.95 <0.21°
B=46.54 <85° ?
C=0.0021 <90.5° S
a) Determine the sending end voltage and current
b) What is the voltage regulation.
c) What is the efficiency of the transmission line.