a) Calculate the variable and constant losses. b) Find the power required at the input of the generator. c) Determine the efficiency of the generator. d) If the load current is reduced to 60%, determine the variable and constant losses for this condition. e) Determine the efficiency of the generator if the load current is reduced to 60% at a terminal voltage of 220 V.

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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QI) A long shunt compound generator is supplying a load 100 A at a terminal voltage of 220 V.
The armature, series and shunt field resistances are 0.2 Q, 0.06 Q and 100 Q respectively. The
iron loss is 400 W and the rotational loss is 500 W.
a) Calculate the variable and constant losses.
b) Find the power required at the input of the generator.
c) Determine the efficiency of the generator.
d) If the load current is reduced to 60%, determine the variable and constant losses for this
condition.
e) Determine the efficiency of the generator if the load current is reduced to 60% at a
terminal voltage of 220 V.
Transcribed Image Text:QI) A long shunt compound generator is supplying a load 100 A at a terminal voltage of 220 V. The armature, series and shunt field resistances are 0.2 Q, 0.06 Q and 100 Q respectively. The iron loss is 400 W and the rotational loss is 500 W. a) Calculate the variable and constant losses. b) Find the power required at the input of the generator. c) Determine the efficiency of the generator. d) If the load current is reduced to 60%, determine the variable and constant losses for this condition. e) Determine the efficiency of the generator if the load current is reduced to 60% at a terminal voltage of 220 V.
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