400 V 50 Hz, Y-connected, 6-pole synchronous generator per phase synchronous reactance 1.0 Ω at back power factor of 0.9 full load armature current 50 A, friction and wind losses 1.25 kW and core losses at 50Hz full load 1.0 kW and armature resistance and loss are neglected. The excitation current is adjusted so that the no-load output voltage is 400V. According to this; a) Calculate the rotation speed of the generator. b) find the terminal voltages at load with rated current at 0.8 back power factor and unit power factor . c) Calculate the voltage regulation of the generator for power coefficients of 0.8 back and 1.0.

400 V 50 Hz, Y-connected, 6-pole synchronous generator per phase synchronous reactance 1.0 Ω at back power factor of 0.9 full load armature current 50 A, friction and wind losses 1.25 kW and core losses at 50Hz full load 1.0 kW and armature resistance and loss are neglected. The excitation current is adjusted so that the no-load output voltage is 400V. According to this; a) Calculate the rotation speed of the generator. b) find the terminal voltages at load with rated current at 0.8 back power factor and unit power factor . c) Calculate the voltage regulation of the generator for power coefficients of 0.8 back and 1.0.

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.48P

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