9-16. A 50 Hz three phase transmission line is 300 km long. It has a total series impedance of 23 + j75 Ω and a shunt admittance of j500 μS. It delivers 150 MW at 220 kV, with a power factor of 0.88 lagging. Find the voltage at the sending end using (a) the short line approximation. (b) The medium-length line approximation. (c) The long line equation. How accurate are the short and medium-length line approximations for this case?
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