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| Analysis and treatment of protection maloperation caused by secondary voltage neutral two grounding |
| Xu Xingfa |
| Shaoguan Power Supply Bureau, Guangdong Power Grid Corporation, Shaoguan, Guangdong 512026 |
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Abstract For 110kV line zero sequence protection direction against the wrong direction of the accident. Combined with the protection device failure action waveform and the scene of the secondary wiring inspection and theoretical analysis. The cause of the cause of the malfunction is the existence of voltage transformer secondary circuit neutral point N600 two-point grounding. Put forward the relevant measures of such accidents, pointing out the necessity and importance of implementing relay protection anti-accident measures.
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Received: 29 October 2017
Published: 21 May 2018
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| Cite this article: |
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Xu Xingfa. Analysis and treatment of protection maloperation caused by secondary voltage neutral two grounding[J]. Electrical Engineering, 2018, 19(5): 76-79.
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http://dqjs.cesmedia.cn/EN/Y2018/V19/I5/76
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2018, Vol. 19 
