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Question: A three-phase, 60-Hz, completely transposed transmission line has a length of 100-km and has a...

Question: A three-phase, 60-Hz, completely transposed transmission line has a length of 100-km and has a series impedance per phase of (0.25+j0.85) ohms/mile and shunt admittance of 5.0*10^-5 Siemens/mile. The transmission line delivers 150 MW at 0.85 lagging power factor to a load connnected to its receiving end. The line-to-line voltage at the receiving end is 138-kV. Note: The Medium Length Line method should be used since it is used for distances between 50 miles to 150 miles.

Determine the following:

(a) Sending-end voltage and current (In Line to neutral)

(b) Sending-end real and reactive power

(c) Total power dissipated in the transmission line.

engineering   Electrical-Engineering   
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Answer #1

Nominal metho,d 1-609 2- (0.25+Jo 8 s)X 62-15 sx 1os x 62.15 3 50xIo ㄚ一 138.3 231.783 A 2 -0.085 -13.6) 2 0.042s/ ך3.61

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