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| Operation analysison a relay protection action of generator disconnecting switch ground fault and its improvement |
| Zhou Hongbin, Zhu Jianwei, Wang Huayou |
| Tianshengqiao Hydropower Station of CSG Power Generation Company, Xingyi, Guizhou 562400 |
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Abstract A relay protection action behavior of generator outlet switch fuse gap grounding fault is introduced. The reason of failure in timely fault clearing is find out through the detailed analysis of relay protection device, fault recorder data and on-the-spot SOE recording data. It is suggested that the measurement of the electric parameters of the generator is emphasized, including Neutral point arc suppression coil inductance, electric resistance and Measurement of PT ratio, Machine end equipment earth capacity, etc. According to the measured data, the generator stator grounding protection voltage value, the protection delay will be checked in detail.
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Received: 27 May 2017
Published: 22 January 2018
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| Cite this article: |
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Zhou Hongbin,Zhu Jianwei,Wang Huayou. Operation analysison a relay protection action of generator disconnecting switch ground fault and its improvement[J]. Electrical Engineering, 2018, 19(1): 85-89.
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http://dqjs.cesmedia.cn/EN/Y2018/V19/I1/85
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2018, Vol. 19 
