Give ALL your answers correct to 4 d.p. Include minus sign in your answers where necessary. A load of 15 MW, with power

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Give All Your Answers Correct To 4 D P Include Minus Sign In Your Answers Where Necessary A Load Of 15 Mw With Power 1 (48.15 KiB) Viewed 31 times

Give All Your Answers Correct To 4 D P Include Minus Sign In Your Answers Where Necessary A Load Of 15 Mw With Power 2 (56.56 KiB) Viewed 31 times

Give All Your Answers Correct To 4 D P Include Minus Sign In Your Answers Where Necessary A Load Of 15 Mw With Power 3 (56.56 KiB) Viewed 31 times

Give ALL your answers correct to 4 d.p. Include minus sign in your answers where necessary. A load of 15 MW, with power factor 0.75 lagging, is supplied at a voltage level of 11 kV. The impedance of the line between the point of common coupling (PCC) and the load connection point is Z = (0.4+j0.9) 1. Power factor of the load is further improved to 1 (unity power factor operation) by adding the reactive power compensator at the load connection point. Part A) Calculate the current, impedance drop, and sending end voltage, before power factor correction [7 marks]: Current, I = Number Number A Impedance drop, AU = Number Number V Sending end voltage, IEI = Number Number V Part B) Determine the current, impedance drop, and sending end voltage, after power factor correction [7 marks): Current, I = Number Number A Impedance drop, AV = Number Number V Sending end voltage, E = Number Number V Part C) Find the voltage drop for parts a) and b) above, as well as the corresponding power factor at the PCC. [6 marks] Parta: Voltage drop, IAV I= Number V power factor, Number Part b: Voltage drop, IAVI = Number V power factor, Number
Give all your answers correct to 4 d.p. A 480 V permanent-magnet excited DC motor has armature resistance of 1.5 2. When driving a load of constant load torque at rated speed of 1,000 rpm, the armature takes rated 25 A. Speed is controlled by armature voltage variation, and armature is supplied from a three-phase fully controllable bridge rectifier. Available AC voltage is three-phase 400 V, 50 Hz, interfacing transformer is not used, and armature current is continuous. a) The machine operates at rated speed with rated load. Determine rectifier output voltage and thyristor firing angle. [5 marks) Vrect1 = Number V Q1 = Number • (degree) b) Determine the rated motor torque and power. [6 marks] Ten = Number Nm Pn= Number kW c) The machine operates at 25% of the rated speed with 60% of the rated load. Determine rectifier output voltage and the thyristor firing angle. [5 marks] Vrect2 = Number V A2 = Number • (degree)