Question

Text: Given, (for long transmission line) A three-phase, 50-Hz, 400-kV transmission line is 450-km long. The transmission line has the following parameters: r = 0.033 Î©/km, L = 1.067 mH/km, C = 0.0109 Î¼F/km The Receiving-end power is 420 MW at 0.95 p.f. lagging. The load is now working at half of the rated load and the power factor is decreased to 0.8. Calculate the parameters from (a to i) a) Characteristic impedance b) Propagation constant c) A, B, C, D parameters d) Voltage at sending-end e) Current at sending-end f) Sending-end power factor and load angle g) Regulation of line h) Sending-end power i) Efficiency

          Text: Given, (for long transmission line)
A three-phase, 50-Hz, 400-kV transmission line is 450-km long.
The transmission line has the following parameters:
r = 0.033 Î©/km, L = 1.067 mH/km, C = 0.0109 Î¼F/km
The Receiving-end power is 420 MW at 0.95 p.f. lagging.
The load is now working at half of the rated load and the power factor is decreased to 0.8. Calculate the parameters from (a to i)
a) Characteristic impedance
b) Propagation constant
c) A, B, C, D parameters
d) Voltage at sending-end
e) Current at sending-end
f) Sending-end power factor and load angle
g) Regulation of line
h) Sending-end power
i) Efficiency

Added by Jessica M.

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