Construct a receiving-end power-circle diagram similar to for the line of Prob. 6.12. Locate the…

Construct a receiving-end power-circle diagram similar to for the line of Prob. 6.12. Locate the point corresponding to the load of Prob. 6.12, and locate the center of circles for various values of ills1 if IVRI = 220 kV. Draw the circle passing through the load point. From the measured radius of the latter circle determine I V51 and compare this value with the values calculated for Prob. 6.12. Prob A 60-Hz three-phase transmission line is 175 mi long. It has a to al series impedance of 35 +040 1 and a shunt admittance of 930 x 10-6/90° S. It delivers 40 MW at 220 kV, with 90% power-factor lagging. Find the voltage at the sending end by (a) The short-line approximation, (b) The nominal-1r approximation, and (c) The long-line equation.        

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