(b) A synchronous generator connected with an equivalent cireuit of Figure Q4 is shown as below. Here, the armature resistance is being ignored. The field current is adjusted so that the terminal voltage is 480 V at no load. Develop and sketch the output phase voltage vs. load current characteristics of the generator under these condition as below: - i) 0.8 p.f. lagging load for 10 A, 30 A and 60 A load current ii) 0.8 p.f. leading load for 10 A, 30 A and 60 A load current Based on the characteristics as above, explain the changes of output phase voltage from the generator. Suggest the method to overcome of the instability of output phase voltage as shown? RA IA 0.2 2 j1.0 2 RĘ VF LF Figure Q4: Synchronous generator equivalent circuit

(b) A synchronous generator connected with an equivalent cireuit of Figure Q4 is shown as below. Here, the armature resistance is being ignored. The field current is adjusted so that the terminal voltage is 480 V at no load. Develop and sketch the output phase voltage vs. load current characteristics of the generator under these condition as below: - i) 0.8 p.f. lagging load for 10 A, 30 A and 60 A load current ii) 0.8 p.f. leading load for 10 A, 30 A and 60 A load current Based on the characteristics as above, explain the changes of output phase voltage from the generator. Suggest the method to overcome of the instability of output phase voltage as shown? RA IA 0.2 2 j1.0 2 RĘ VF LF Figure Q4: Synchronous generator equivalent circuit

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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