Leakage current monitoring method for a long power cable in a substation based on a combined current criterion with self-compensation

被引：0

作者：

Chen H. ^{[1
]}

Liu H. ^{[1
]}

Yao K. ^{[1
]}

Ma Z. ^{[2
]}

Sun X. ^{[1
]}

机构：

[1] State Grid Jiangsu Electric Power Company Maintenance Branch, Nanjing

[2] School of Information and Control Engineering, Qingdao University of Technology, Qingdao

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2022年 / 50卷 / 12期

基金：

中国国家自然科学基金;

关键词：

combined current criteria; differential current; intelligent maintenance; leakage current monitoring; long power cable; residual current;

D O I：

10.19783/j.cnki.pspc.211259

中图分类号：

学科分类号：

摘要：

There is lack of an effective leakage current monitoring method for a long power cable in a substation. In this paper, based on the analysis on the variation features of leakage current and the imitation of present monitoring methods, a method for a substation AC system based on a combined current criterion with self-compensation is proposed. The residual current and the signal phase current of two ends of the power cable are used. The criterion is a combination of steady-state residual current, residual current increment, steady-state residual current differential, and single-phase residual current differential criteria, to achieve reliable detection on asymmetric leakage and three phase leakage currents of a long cable. The case study results show that the proposed method can monitor different kinds of leakage of a long power cable effectively and promote the level of AC system intelligent maintenance in a substation. © 2022 Power System Protection and Control Press. All rights reserved.

引用

页码：172 / 179

页数：7

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