4. Two power stations, A and B, which are in phase at 66 kV, supp!y respective
inductive loads of 455 MVA at an inductive power factor of 0.766 and 555
MVA at a lagging power factor of 0.88295 respectively. An inter-connector
with an impedance of 4.45∠75 0 ohms per line, links station A with station B.
By means of a phase regulator at A, the phase angle of the voltage at A is
advanced in order to increase the loading of station A to 620 MW.
4.1 Use standard formulae and calculate the angle of advance at power station A.
4.2 Calculate the transmission line active power loss.
4.1 The angle of advance at power station A.
Solving the above equation we get
4.2 The transmission line active power loss.
Power at B
We can recall that Power at A = 620 MW
Therefore, Power loss