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Question 1. The ABCD constants of a lossless three-phase 500 kV transmission line are A=D=0.86+j0; B= 0+j130.292; C-j0.002 Mho; (a) Calculate the sending end voltage, current, complex power and the voltage regulation when line delivers 1000 MVA at 0.8 lagging power factor at 500 kV. (5 Marks) (15 Marks) (b) To improve the performance, series capacitors are installed at both ends in each phase of the transmission line. As a result of this, the compensated ABCD constant become A' 1 A [ & B] - [ - ][ & B][ ! -*e] C' D' 0 1 C D 0 1 Where Xc is the total reactance of the series capacitor. If Xc=100 Determine the compensated ABCD constants. (1) (ii) (iii) (3 Marks) Determine the sending end voltage and the voltage regulation when line delivers 1000 MVA at 0.8 lagging power factor at 500 kV for the compensated line. (4 Marks) Name the type of compensation that has been used for improving the voltage regulation. At a lightly loaded power system, what type of compensation will you recommend? Name any three FACTS devices suitable for both types of compensations that could be useful for both light and full load situations. (3 Marks)