Two similar 6,600-V, three phase generators are running in parallel on constant-voltage and frequency bus bars. Each has an equivalent resistance and reactance of 0.05 Ω and 0.5 Ω respectively and supplies one half of a total load of 10,000 kW at a lagging p.f. of 0.8, the two machines being similarly excited. If the excitation of one machine be adjusted until the armature current is 438 A and the steam supply to the turbine remains unchanged, find the armature current, the e.m.f. and the p.f. of the other alternator.
Two similar 6,600-V, three phase generators are running in parallel on constant-voltage and frequency bus bars. Each has an equivalent resistance and reactance of 0.05 Ω and 0.5 Ω respectively and supplies one half of a total load of 10,000 kW at a lagging p.f. of 0.8, the two machines being similarly excited. If the excitation of one machine be adjusted until the armature current is 438 A and the steam supply to the turbine remains unchanged, find the armature current, the e.m.f. and the p.f. of the other alternator.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Two similar 6,600-V, three phase generators are running in parallel on constant-voltage and
frequency bus bars. Each has an equivalent resistance and reactance of 0.05 Ω and
0.5 Ω respectively and supplies one half of a total load of 10,000 kW at a lagging
p.f. of 0.8, the two machines being similarly excited. If the excitation of one
machine be adjusted until the armature current is 438 A and the steam supply to the
turbine remains unchanged, find the armature current, the e.m.f. and the p.f. of the
other alternator.
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