Problem 6 a- Explain the reasons for applying system grounding in electric power systems. Consider the industrial plant distribution bus which is supplied by a utility source with per-ur sequence reactances as shown in Figure (4-a). Assume that all reactances are given on a 5,000-kV base, and that the plant's bus voltage is 4,160-V. b- Determine the fault current for a single line to ground fault on phase A of the bus. Assume now that an ungrounded 5,000 kVA generator is added at the distribution bus as shown in Figure (4-b). C- Determine the fault current for a single line to ground fault on phase A of the bus. Assume now that the utility transformer is grounded through a 8 2 grounding resistor as shown in Figure (4-c.) d- Determine the value of the grounding resistor in per unit. e- Determine the fault current for a double line to ground fault on phases B and C of the bus.
Problem 6 a- Explain the reasons for applying system grounding in electric power systems. Consider the industrial plant distribution bus which is supplied by a utility source with per-ur sequence reactances as shown in Figure (4-a). Assume that all reactances are given on a 5,000-kV base, and that the plant's bus voltage is 4,160-V. b- Determine the fault current for a single line to ground fault on phase A of the bus. Assume now that an ungrounded 5,000 kVA generator is added at the distribution bus as shown in Figure (4-b). C- Determine the fault current for a single line to ground fault on phase A of the bus. Assume now that the utility transformer is grounded through a 8 2 grounding resistor as shown in Figure (4-c.) d- Determine the value of the grounding resistor in per unit. e- Determine the fault current for a double line to ground fault on phases B and C of the bus.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter9: Unsymmetrical Faults
Section: Chapter Questions
Problem 9.13P: Consider the oneline diagram of a simple power system shown in Figure 9.20. System data in per-unit...
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