A 2300V, 1000KVA, 0.8PF lagging, 60HZ, two-pole, Y connected synchronous generator has a synchronous reactance of 1.10 and a armature resistance of 0.150. at 60HZ, its friction and windage losses are 20,000W, and its core losses are 18,000w. the field circuit has a DC voltage of 200V and the maximum lr is 10A. the resistance of the field circuit is adjustable over the range from 20 to 20on. The open circuit characteristics is shown in figure below: a) How much field current is required to make Va equal to 2100V when the generator is running at no load? b) What is internal generated voltage of this machine at 80% of rated condition? c) How much field current is required to make Va equal to 2100V when the generator is running at 80% of rated condition? d) How much power and torque must the generator's prime mover be capable of supplying? 20

A 2300V, 1000KVA, 0.8PF lagging, 60HZ, two-pole, Y connected synchronous generator has a synchronous reactance of 1.10 and a armature resistance of 0.150. at 60HZ, its friction and windage losses are 20,000W, and its core losses are 18,000w. the field circuit has a DC voltage of 200V and the maximum lr is 10A. the resistance of the field circuit is adjustable over the range from 20 to 20on. The open circuit characteristics is shown in figure below: a) How much field current is required to make Va equal to 2100V when the generator is running at no load? b) What is internal generated voltage of this machine at 80% of rated condition? c) How much field current is required to make Va equal to 2100V when the generator is running at 80% of rated condition? d) How much power and torque must the generator's prime mover be capable of supplying? 20

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

Chapter11: Transient Stability

Section: Chapter Questions

Problem 11.3P

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