A 3-phase, 50-Hz overhead transmission line 100 km long has the following constants :
•Resistance/km/phase = 0.1 Ω
•Inductive reactance/km/phase = 0·2 Ω
•Capacitive susceptance/km/phase = 0·04 × 10- 4 siemen
Determine:-
(i) the sending end current
(ii) sending end voltage
(iii) sending end power factor and
(iv) transmission efficiency when supplying a balanced load of 10,000 kW at 66 kV, p.f. 0·8 lagging. Use nominal T method.