12. A 60 MVA, 69.3kV, three-phase synchronous generator has a synchronous reactance of 15 ohms/phase and negligible armature resistance. The generator is delivering rated power at 0.8 power factor lagging at the rated terminal voltage to an infinite bus bar. What is the maximum three-phase power that can be generator can deliver before losing its synchronism? a. 288 MW b. 300 MW c. 254 MW d. 348 MW 13. Referring to problem 12, if the generator is delivering 48 MW to the bus bar at the rated voltage with its field current adjusted for a generated emf of 46 kV per phase. Determine the armature current a. 564.282 35.12° A c. 547.472 - 43.06° A b. 585.352 23.29° A d. 530.24 - 49.10° A e 1 of

12. A 60 MVA, 69.3kV, three-phase synchronous generator has a synchronous reactance of 15 ohms/phase and negligible armature resistance. The generator is delivering rated power at 0.8 power factor lagging at the rated terminal voltage to an infinite bus bar. What is the maximum three-phase power that can be generator can deliver before losing its synchronism? a. 288 MW b. 300 MW c. 254 MW d. 348 MW 13. Referring to problem 12, if the generator is delivering 48 MW to the bus bar at the rated voltage with its field current adjusted for a generated emf of 46 kV per phase. Determine the armature current a. 564.282 35.12° A c. 547.472 - 43.06° A b. 585.352 23.29° A d. 530.24 - 49.10° A e 1 of

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

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.11P

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