Problem 4. A 220-kV, three-phase transmission line has a per phase series impedance z = 0.005 +, Q/km and a per phase shunt admittance y = j3.5x10$ S/km. the line is 80 km long. The transmission line...

Extracted text: Problem 4. A 220-kV, three-phase transmission line has a per phase series impedance z = 0.005 +, Q/km and a per phase shunt admittance y = j3.5x10$ S/km. the line is 80 km long. The transmission line is delivering 200 MVA, 0.8 power factor lagging at 230 kV. Using the nominal pi model. a) Draw the equivalent circuit; b) Determine the parameter of two-port network model; c) Determine the voltage, current at the sending end; d) Determine the voltage regulation and the transmission efficiency.