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| Multi-terminal differential protection vector time-correction algorithm based on fault wave head |
| Zhang Jun1, Zhong Jianwei2, Xin Kangkang2, Yuan Yusong2 |
1. State Grid Hubei Electric Power Co., Ltd, Enshi Power Supply Company, Enshi, Hubei 445000;
2. Hubei Minzu University, Enshi, Hubei 445000 |
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Abstract A large number of access to distributed power supply in distribution network has put forward new requirements on the performance of relay protection system of distribution network itself. The existing multi-terminal differential protection based on SDH communication is set as the reliability of the safeguard action, which will inevitably sacrifice a certain sensitivity, so it cannot meet the development demand of the future active distribution network. In this paper,a time-correcting algorithm based on multi-terminal differential protection vector is presented, and it can correct the misalignment of the differential current signal in the distribution network with small electrical distance, which greatly improves the reliability of the protection without sacrificing the sensitivity. The performance of the algorithm is analyzed and validated by an example.
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Received: 20 August 2018
Published: 19 March 2019
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| Cite this article: |
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Zhang Jun,Zhong Jianwei,Xin Kangkang等. Multi-terminal differential protection vector time-correction algorithm based on fault wave head[J]. Electrical Engineering, 2019, 20(3): 31-36.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2019/V20/I3/31
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2019, Vol. 20 
