Self-generated overvoltages due to open-phasing of ungrounded-wye delta transformer banks
Conference
·
OSTI ID:152865
- GE Industrial and Power Systems, Schenectady, NY (United States). Power Systems Engineering Dept.
Disconnecting one phase of an ungrounded-wye delta transformer bank from the source can result in severe overvoltages due to neutral shift and ferroresonance. Neutral shift overvoltages are quantified and their impact on metal-oxide surge arresters are evaluated. Ferroresonance is shown by test data to occur when low-loss banks, 15 kV and higher, are open phased. Design and operating practices to eliminate or mitigate these self-generated overvoltages are discussed.
- OSTI ID:
- 152865
- Report Number(s):
- CONF-9404175--; ISBN 0-7803-1883-8
- Country of Publication:
- United States
- Language:
- English
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