Suppose an area of chattogram is electrified from shiddirganj power station using a 320 km 275 kv three-phase line which has the following general parameter: a=0.9521.0°, b=105277° 2 if the receiving-end voltage si 275 kv, determine
(a) sending-end voltage necessary if a load of 300 mw at 0.9 lagging power factor is being delivered at the receiving end,
(b) maximum power that can be transmitted if the sending-end voltage is held at 290 kv,
(c) the additional reactive mva that will have to be provided at the receiving end when delivering 450 mva at 0.9 lagging power factor, the supply voltage being 290 kv.