Question:
a) Discuss the following terms as applied to transmission lines:
i) Voltage regulation.
ii) Transmission efficiency.
iii) Transposition.
b) Show how regulation and efficiency are determined for medium lines using end-condenser method.
Illustrate your answer with suitable vector diagram.
c) A 3 phase, 60Hz 16 Km long overhead line supplies 1000 kW at 11 kV, 0.8 p.f. lagging. The line resistance is 0.03 Ω per phase per Km and line inductance is 0.7 mH per phase per Km.
Calculate:
i) Sending end voltage
ii) Voltage regulation.
iii) Efficiency of transmission