OPEN BOOK AND NOTES TEST 1 ECSE-464 POWER SYSTEM ANALYSIS Thursday, March 3rd. 2005 Prof. F.D. Galiana (1)If the symmetrical components of a set of phase currents are 0120.510.5I=per unit, find abcIin per unit and draw its phasor diagram. (2)The impedance matrix of a three-phase load is given by 521142214jpu. Does this correspond to a balanced load? Prove your answer by analyzing the phase voltages that result when you apply balanced currents to the load, one type at a time, starting with zero sequence, then positive sequence, then negative sequence. (3)The series impedance matrix of a three-phase transmission 735 kV, 2000 MVA line is given by 130201010130202010130jjjjj+++ohms. Find the base impedance. Find the impedance matrix in symmetrical components in ohms and in per unit. (4)Consider the positive sequence equivalent of a lossless transmission line with series impedance j0.5 pu. The voltage magnitude at the sending end is 1 pu, while the receiving end voltage is denoted by V in per unit. Find the maximum real power in pu
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Electric power transmission, Transmission line, impedance matrix, Prof. F.D. Galiana, 30