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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
MindTap Engineering, 1 term (6 months) Printed Access Card for Glover/Overbye/Sarma's Power System Analysis and Design, 6th
- 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_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_forwardH* 3G zain IQ Asiacell The generator convert from PV to PQ if the active power of the generator exceed the * maxinum and minimum limits between the maximum and mimium limit equal to the load power Non of them With base voltage of 450 kV. The actual voltage of the generator is 560 kV. The magnitude voltage in the parameter of the PV generator in the nepaln software is * O 1.2444 pu O 450 kV O 124.44 % O 0.8036 pu 80.36 % Non of themarrow_forward
- )Two complex loads Z1 and Z2 are connected in parallel and powered by a value voltage effective 7.2 kV and frequency 60 Hz. The first load has a power of 50 kVA and a factor of rear power of 0.9. The second charge has a power of 45 kW and a rear power factorof 0.91. Determine in steady state the kVAR power and the capacity required to correct the Total power factor to a value of 0.97 rear.arrow_forwardIn the circuit in the figure; L1 load draws 15 kVA with lagging power factor 0.6. The L2 load draws 6 kVA with a leading power factor of 0.8. According to this; What is the value of the complex power for the L2 load?arrow_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_forward
- Draw 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_forward2. 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_forward
- Zjine 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_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_forwardA three-phase alternator generating unbalanced voltages is connected to an unbalanced load through a 3-phase transmission line as shown in figure. The neutral of the alternator and the star point of the load are solidly grounded. The phase voltages of the alternator are Ea = 1020°, Eb = 102-90°, Ec = 10/120⁰ E E E The positive sequence component of the load current is (A) 1.3102-107⁰ A (B) 0.332Z –120° A (C) 0.9962-120° A (D) 3.5104-81⁰ A +) + j1.002 0000 j1.002 0000 j1.0Ω vovo j1.0Ω 0000 j2.002 voor j3.002 ooooarrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning