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Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is
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Chapter 2 Solutions
Power System Analysis and Design (MindTap Course List)
- The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load under sinusoidal-steady-state excitation. is (a) Nonzero constant (b) Zero (c) Containing double-frequency componentsarrow_forwardTwo SGs are supplying a load by Pwad with 0.9 PF lagging. Gi has a no-load frequency of 54H2, and a slope Spi=1.1MW/Hz. G2 has a no-load frequency of 51HZ, and a slope Spz=1.1MW/Hz. If the system frequency is 50HZ: 1. How much power is supplied by each generator? 2. What is the load power Pload? 3. Draw the house-diagram for this system. 4. Find the system frequency, if the governor set points on G1 are decreased by 1Hz.arrow_forward9. Based on figure shown below, determine a) Phase voltage and currents in load 1 and 2 b) The real, reactive and complex power supplied by the generator when switch S, is open c) The real, reactive and complex power supplied by the generator when switch S, is closed I 100 kVA (Y-connected) Load 1 ) 0.9 PF lag Load 2) 80 kw (delta-connected) 0.85 PF lag G 415 V Load 3 60 kVA (deta-connected) 0.85 PF lead A-connected [a) 239.6 V, 139.122-25.84° A, 415 V, 75.62-31.79° A] [b) 193.86/28.72" kVA, 170kW, 93.17 kvar] [c) 60Z-31.79° kVA, 221 kW, 615.6 kvar]arrow_forward
- 2. For the following system shown in the figure, calculate: a. The current through each phase of the load. b. The total real and reactive power of the three-phase load. c. The power factor at the load side. A 220 V 20° 220VL-120° U8 vol 152 I 220 VI20° 9. M.arrow_forwardA balanced Y-connected generator with terminal voltage Vbc 5 200/08 volts is connected to a balanced-D load whose impedance is 10/408 ohms per phase. The line impedance between the source and load is 0.5/808 ohm for each phase. The generator neutral is grounded through an impedance of j5 ohms. The generator sequence impedances are given by Zg0 5 j7, Zg1 5 j15, and Zg2 5 j10 ohms. Draw the sequence networks for this system and determine the sequence components of the line currents.arrow_forwardDraw a 3-phase wye-connected generator with transmission lines connected to a 3-phase delta-connected load. Assume the lines connecting them have an inductance of j5 per phase. The generated voltages are 120 Vrms with phase 'a' having a phase angle of 0°. The loads are 10 Ohm resistors per phase. When drawing, make sure to label all 3 phases with voltage phasors, line inductances, and load resistances.arrow_forward
- PLEASE SHOW ALL THE STEPS AND THE WAY OF THE SOLUTION , BECAUSE I WANT TO LEARN HOW TO SOLVE, THANK YOU FOR YOUR UNDERSTANDINGarrow_forwardZjine 1:10 10:1 VG = 13.84 0° kV Zoad T1 T2 A 13.8-kV, single-phase generator supplies power to a load through a step-up transformer, a transmisson line, and a step-down transformer as in the figure above. Assume the transformers are ideal. The load's impedance is Zload = 200 L 36.87°, and the transmission line's impedance is Zline = 80 L 60° What is the efficiency of the transmission system?arrow_forwardSolve 9arrow_forward
- There is an installation with two equal three-phase loads of 150 kW each and a power factor of 0.9 in lagging. By connecting a pure reactive element in parallel, the reactive power at the input of the installation is 160 kVARS, with a lagging power factor. It can be said that:A)Capacitors were connected and the fp improved. B) Capacitors were connected and the fp improved. C) Reactors were connected and the fp improved. D)Reactors were connected and fp improved. E) None of the abovearrow_forwardThere is an installation with two identical three-phase motors, 50 HP each and a power factor of 0.9 behind. When connecting a pure reactive element in parallel, the reactive power at the installation input is 50 kVARS, with a lagging power factor. We can say that: a) A capacitor bank was connected and the pf improved. b) A bank of inductors was connected and the pf improved. c) A capacitor bank was connected and the pf deteriorated. d) A bank of inductors was connected and the pf deteriorated. e) None of the above.arrow_forwardThe terminal voltage of a 3-φ generator is 19053 V, line-to-line. The load draws a current of 1515 A, leading, with a phase angle of 30o. The total real power, drawn by the load would be:arrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage LearningDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning