Question

The three phase 400kV transmission line is lj = 160km long. The end-of-line voltage is 410 kV and the load is 400 MVA with a power factor of 0.8 ind. The cable parameters are: r = 0.026 Ω / km, x = 0.33Ω / km, g = 0.023µS / km and b = 3.57µS / km. Calculate the upstream phase voltage and phase current of the cable.

Enter the upstream phase voltage U1v of the line in kV

Enter the lead upstream phase current I1v in unit A

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Answer #1

Rxe MA sex Giren lenge of total resistanc - reactana total admillance line 160km - 0.026 x 160 -9.16r. 0.33 X 160 52.82 (3.5+la.he h ou VS (line) - 940.126 L 5.117 Is - Icut I j (254.103 x10 ) (5-7488) 2009 Ic, 7272) A Is = In the 72-92) + $26.922-

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