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| Fault analysis of differential current of transmission line protection in smart substation |
| LI Bin, CHEN Ruijun, LOU Lingjiao, QIAO Xingjin, DING Kanran |
| State Grid Jiangsu Electric Power Maintenance Branch Company, Nanjing 210000 |
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Abstract The optical fiber differential current protection, using fiber channel to transmit data between both ends of the line, is applied in power system widely. On the basis of data synchronization, the protection is able to judge the internal faults and external faults simply and reliably. This paper analyzes the abnormal differential current of transmission line protection caused by difference of the rated time delay between the setting value and the actual value of merging unit in intelligent substation. The corresponding testing advice is put forward in this paper.
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Received: 16 November 2020
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| Cite this article: |
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LI Bin,CHEN Ruijun,LOU Lingjiao等. Fault analysis of differential current of transmission line protection in smart substation[J]. Electrical Engineering, 2021, 22(7): 99-102.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2021/V22/I7/99
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2021, Vol. 22 
