Parameter adaptive correction based inverse-time overcurrent protection method of petal-shaped distribution network

被引：0
|
作者：
Chen X. [1 ]
Yan R. [1 ]
Li Y. [1 ]
Li Z. [2 ]
Jiang S. [2 ]
Geng S. [3 ]
机构：
[1] Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin
[2] China Electric Power Research Institute, Beijing
[3] State Grid Hebei Electric Power Company, Shijiazhuang
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 04期
关键词：
inverse-time overcurrent protection; parameter adaptive correction; petal-shaped distribution network; selectivity; speed;
D O I：
10.16081/j.epae.202211013
中图分类号：
学科分类号：
摘要：
The petal-shaped distribution network under closed-loop operation has more complex fault characteristics，which makes it difficult for traditional protection methods to satisfy the requirements of selectivity and speed. Aiming at this problem，the short circuit fault characteristics of the petal-shaped distribution network are analyzed. The variation trend of both upstream and downstream fault currents with the changing of fault location is revealed. And the problems encountered in the application of definite-time and standard inverse-time overcurrent protection to petal-shaped distribution network are clarified. Then，combined with the fault current characteristics of the petal-shaped distribution network，a parameter adaptive correction based inverse-time overcurrent protection（PACITO） method is proposed. The PACITO only uses the local current information to adaptively correct the inverse-time characteristic，which can significantly improve the speed of protection while ensuring selectivity. A 10 kV petal-shaped distribution network model is established in PSCAD／EMTDC simulation software to verify the PACITO method. The simulative results prove that the proposed protection can improve protection selectivity and speed while also overcoming the drawbacks of traditional petal-shaped distribution network protection methods. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：143 / 151
页数：8
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