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| Fault Analysis and Prevention Measures of Busbar Differential Protection Malfunction Caused by Two Grounding Points on Secondary Circuit of Current Transformer |
| Zhai Baoyu, Ma Tao, Li Kaixin |
| State Grid Xinjiang Electric Power Research Institute, Urumqi 830011 |
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Abstract In the power system, in order to prevent the secondary circuit of the current transformer from over-voltage, the secondary circuit must be grounded at one point. However, due to the secondary circuit insulation failure, the installation process is defective or other man-made causes the secondary circuit multi-point grounding, will cause relay protection Device false alarm or even relay protection malfunction accident. In this paper, a case of busbar differential protection malfunction caused by two grounding points on secondary circuit of Current transformer, analysis of the cause of the accident, put forward two-point grounding for the current transformer preventive measures.
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Published: 19 April 2017
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| Cite this article: |
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Zhai Baoyu,Ma Tao,Li Kaixin. Fault Analysis and Prevention Measures of Busbar Differential Protection Malfunction Caused by Two Grounding Points on Secondary Circuit of Current Transformer[J]. Electrical Engineering, 2017, 18(4): 143-145.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2017/V18/I4/143
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2017, Vol. 18 
