Performance of transmission lines 1
Question Question 12 A load of 1000 kw at 0.8 power factor lagging is received at the end of a 3 phase line 20 km long . The resistance and reactance of each conductor are 0.25 ohm and 0.28 ohm per kilometre.if the receiving end line voltage is maintained at 11 kv , calculate. (1) Sending end voltage ( line to line ) (2) % regulation, (3) transmission efficiency , Solution = Question 13 Estimate the distance over which a load of 15000 kilowatt at 0.85 power factor can be delivered by a 3 phase transmission line having conductor of Steel cored Aluminium each of resistance 0.905 ohm per phase per kilometre. The voltage at the receiving end is to be 132 kv and the loss in transmission is to 7.5 % of the load . Question 15 A short 3 phase transmission line with an impedance of ( 5 +j20) ohm per phase has sending end and receiving end voltage of 46.85 kv and 33 Kv respectively for some receiving end load at a power factor of ...