Draw the network: 1 .Grounded Delta

For transferring electrical power at 220 kV, six conductors of ACSR Drake constitute a 60Hz double circuit three phase line arranged as shown below. The vertical spacing between consecutive conductors is 14ft; the longer horizontal distance is 32ft whereas the shorter horizontal distance is 25ft. a. Find the inductance per phase per mile and the inductive reactance per phase in ohms per mile. b. Find the capacitive reactance to neutral in ohm-miles. c. Find the resistance per phase per mile in ohms per miles. d. If the length of the line is 90 miles then draw an equivalent circuit of the line and analyse the open circuit and short circuit performance of the line. e. Find the maximum power we can transmit over the line. f. If the line is delivering power to a load of 20MW at 0.8 power factor lagging then find the voltage at the receiving end of the line. Also, Determine the voltage regulation, losses and efficiency of the line. g. If a fixed shunt compensation of 3 MVAr is attached at…

The first question has been solved. Qii?

2. (a) (b) (1) A 100 kVA, 4000 V / 200 V, 50 Hz single-phase transformer has 100 secondary turns. Determine: The primary and secondary currents. The number of primary turns. Three single-phase transformers are connected in Delta- Wye (A-Y) as shown in Figure 2.1. Each transformer is rated 100 kVA, 2300/13800 V RMS, 50 Hz. The total three-phase load L is 270 kVA with a power factor of 0.866 lagging. The input voltages are: VAB = 23000° VBC = 2300 Z-120° VCA = 2300 120° Assume that the transformers are ideal and the line-to- neutral voltage on the secondary are in phase with the input voltages. A B C 100000 100000 b n