A 381 V, 50 Hz, Y-connected, eight poles synchronous generator has the OCC given in tabular form below (Phase Voltage versus the field current). The generator has a per-phase synchronous reactance of 2.0 , and an armature resistance of 0.2 0. If the armature current is 45.8 Amperes, at 0.8 PF lagging. How much field current must be supplied to the generator to keep the terminal voltage at 381 V? 125 450 1.0 41 E. (V) IF. (A) Answer: 0 0.00 65 0.5 The required field current is: 260 2.0 290 320 2.25 2.55 Amperes. 380 420 3.7 350 2.7 3.0 470 +

Power System Analysis and Design (MindTap Course List)
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ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
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Chapter12: Power System Controls
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Problem 12.11P
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A 381 V, 50 Hz, Y-connected, eight poles synchronous generator has the OCC given in tabular form below (Phase Voltage
versus the field current).
The generator has a per-phase synchronous reactance of 2.0 2, and an armature resistance of 0.2 02.
If the armature current is 45.8 Amperes, at 0.8 PF lagging.
How much field current must be supplied to the generator to keep the terminal voltage at 381 V?
125
1.0
E. (V)
IF. (A)
0
0.00
65
0.5
Answer:
The required field current is:
260
2.0
290
2.25
Amperes.
320
2.55
350
380
2.7 3.0
470
41 425
450
420
3.7
211 PM
Transcribed Image Text:A 381 V, 50 Hz, Y-connected, eight poles synchronous generator has the OCC given in tabular form below (Phase Voltage versus the field current). The generator has a per-phase synchronous reactance of 2.0 2, and an armature resistance of 0.2 02. If the armature current is 45.8 Amperes, at 0.8 PF lagging. How much field current must be supplied to the generator to keep the terminal voltage at 381 V? 125 1.0 E. (V) IF. (A) 0 0.00 65 0.5 Answer: The required field current is: 260 2.0 290 2.25 Amperes. 320 2.55 350 380 2.7 3.0 470 41 425 450 420 3.7 211 PM
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