TOPIC: Transmission Lines, Power Systems, and Powerplants: INSTRUCTIONS: - Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer. - Step-by-step solution, do not skip even simple calculations to avoid confusion. - If answered in written form, make sure it is readable. PROBLEM: A three-phase short circuit occurs at F in the system of the figure given. The generator is loaded to 80 percent of its capacity at the time of the fault, and the receiving-end power factor is unity. Determine the rms per-unit current in one phase at F just after the occurrence of the fault (pu). 5.81 6.02 3.01 7.25

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter30: Dc Motors
Section: Chapter Questions
Problem 6RQ: What is CEMF?
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TOPIC: Transmission Lines, Power Systems, and Powerplants:

INSTRUCTIONS:
- Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer.
- Step-by-step solution, do not skip even simple calculations to avoid confusion.
- If answered in written form, make sure it is readable.

PROBLEM:

A three-phase short circuit occurs at F in the system of the figure given. The generator is loaded to 80 percent of its capacity at the time of the fault, and the receiving-end power factor is unity. Determine the rms per-unit current in one phase at F just after the occurrence of the fault (pu).

  • 5.81
  • 6.02
  • 3.01
  • 7.25 
0.1 pu
G
X = 0.8 pu
Xd' = 0.3 pu
X" = 0.23 pu
*F
*
0.6 pu
0.6 pu
0.1 pu
Infi
Infinite bus
1.0 pu
Transcribed Image Text:0.1 pu G X = 0.8 pu Xd' = 0.3 pu X" = 0.23 pu *F * 0.6 pu 0.6 pu 0.1 pu Infi Infinite bus 1.0 pu
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