A 3phase transmission line 200 km long has the following constants
Resistance / phase / km= 0.16 ohms
Reactance /phase/km = 0.25 ohms
Shunt admittance/ phase/ km =1.5 *10-6 S
Calculate by rigorous method the sending end voltage and current when the line is delivering a load of 20 MW at 0.8 p.f. lagging. The receiving end voltage is kept constant at 110 kV.