南方电网技术2026，Vol.20Issue(2)：126-136,11.DOI:10.13648/j.cnki.issn1674-0629.2026.02.013
弱联络海岛微电网群故障检测与定位方法
Fault Detection and Location Methods for Weakly Connected Island Microgrids Group
摘要
Abstract
Weakly connected microgrid lacks terrestrial grid support,resulting in unstable system power flow dynamics and low fault current levels,and leads to complicate protection design.To address this,virtual leakage current is constructed using node voltage information to reveal the characteristics of line-end node virtual leakage current under normal disturbances,internal fault and external fault conditions.Based on this,a fault section detection criterion and fault distance calculation model are established,a fault detection and location method suitable for weakly connected microgrid is proposed.Finally,simulation results demonstrate that the proposed method accurately identifies faulted lines and phases under varying fault resistances,locations,and types,with fault location errors between main grid lines and microgrids interconnected lines remaining below 5%.关键词
弱联络海岛/微电网群/虚拟漏电流/故障区段判别/故障定位Key words
weakly connected island/microgrids group/virtual residual current/fault section identification/fault location分类
信息技术与安全科学引用本文复制引用
向真,谈赢杰,舒放,欧仲曦,黄珊..弱联络海岛微电网群故障检测与定位方法[J].南方电网技术,2026,20(2):126-136,11.基金项目
国家自然科学基金资助项目(U22B2096) （U22B2096）
中国南方电网有限公司科技项目(030400KK52220004(GDKJXM20220179)). Supported by the National Natural Science Foundation of China(U22B2096) （030400KK52220004(GDKJXM20220179）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.,(030400KK52220004(GDKJXM20220179)). （030400KK52220004(GDKJXM20220179）
