Practical design of generator surge protection

Generator withstand voltages, overvoltages from the power system, and arrester capabilities are critically reviewed. The specified withstand is compared with tested breakdowns for some 248 coils in five large machines using DC, power frequency, and impulses. System stresses normally prescribed for l...

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Bibliographic Details
Published in:IEEE transactions on power delivery 1991-04, Vol.6 (2), p.736-743
Main Authors: Dick, E.P., Gupta, B.K., Porter, J.W., Greenwood, A.
Format: Article
Language:English
Subjects:
20 FOSSIL-FUELED POWER PLANTS
200104 - Fossil-Fueled Power Plants- Components
240100 - Power Systems- (1990-)
Applied sciences
Arresters
Circuit faults
Circuit testing
DESIGN
ELECTRIC GENERATORS
Electrical engineering. Electrical power engineering
ELECTRICAL FAULTS
Electrical machines
EQUIPMENT PROTECTION DEVICES
Exact sciences and technology
Power generation
Power system faults
Power system protection
POWER TRANSMISSION AND DISTRIBUTION
RECOMMENDATIONS
Resonance
Surge protection
SURGES
Voltage
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Summary:Generator withstand voltages, overvoltages from the power system, and arrester capabilities are critically reviewed. The specified withstand is compared with tested breakdowns for some 248 coils in five large machines using DC, power frequency, and impulses. System stresses normally prescribed for lightning are supplemented to included HV line faults, circuit breaker closing, reignitions and restrikes, fault clearing, arcing faults on the isolated phase bus, harmonic line resonance, ferroresonance, transformer HV to LV faults, the effects of stuck breaker poles, and other contingencies. It is found that internal winding stresses may be amplified due to resonance and slot reflection effects. The vulnerability of arresters to temporary overvoltages is considered. Practical guidelines for the design of generator surge protection are provided.< >
ISSN:0885-8977
1937-4208
DOI:10.1109/61.131134