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A three-phase, 34.5-kV, 60-Hz, 40-km transmission line has a per-phase series impedance of 0.2+j0.5/km. The load at the receiving end absorbs 10 MVA at 33 kV. Calculate the following:
(a) Sending-end voltage at 0.9 PF lagging.
(b) Sending-end voltage at 0.9 PF leading.
(c) Transmission system efficiency and transmission-line voltage regulation corresponding to cases (a) and (b).
what is the effect of back emf ?
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