Question

A single phase overhead transmission line delivers 4000 kW at 11 kV at 0·8 p.f. lagging. If resistance and reactance per conductor are 0·15 Ω and 0·02 Ω respectively, calculate :

(i) percentage regulation (ii) sending end power factor

(iii) line losses [(i) 19·83% (ii) 0·77 lag (iii) 620 kW]

Step 1

The equivalent circuit diagram is as follows:

Step 2

Let us calculate the sending end voltage, Vs :

Step 3

(i) Percentage regul...

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