南方电网技术2025，Vol.19Issue(12)：100-111,12.DOI:10.13648/j.cnki.issn1674-0629.2025.12.010
基于线电压组合调控的配电网单相接地故障消弧与保护方法
Arc Suppression and Protection Method for Single-Phase Grounding Fault Based on Combined Regulation of Line Voltage in Distribution Network
摘要
Abstract
Aiming at the problem of arc suppression and protection of single-phase grounding fault in non effectively grounded distribution network,a single-phase grounding fault arc suppression method based on line voltage combination regulation of distribu-tion network is proposed.Using the characteristics of single-phase grounding fault and line voltage constant in the regulation process,the three-phase line voltage is obtained from the adjustable injection transformer from the system,the injection transformer ratio and the secondary side switch are adjusted to flexibly regulate the zero sequence voltage,and the fault phase voltage is actively suppressed to 0,which realizes reliable arc suppression of grounding fault.Furthermore,a single-phase grounding fault type and feeder identifica-tion method based on the combined regulation of line voltage in distribution network is proposed.The change characteristics of injec-tion current,zero sequence voltage and zero sequence current of each feeder before and after the change of injection transformation ratio are analyzed.The double identification criteria of ground fault type and feeder based on phase angle difference and admittance ratio are constructed to realize the sensitive identification of ground fault type and fault feeder.The proposed method is verified in PSCAD/EMTDC simulation environment.The simulation results show that the method can effectively suppress the grounding fault arc,realize the active,sensitive and accurate identification of grounding fault types and feeders,and improve the safe and reliable operation ability of distribution network.关键词
配电网/单相接地故障/故障消弧/故障辨识/相角差Key words
distribution network/single-phase grounding fault/fault arc suppression/fault identification/phase angle difference分类
信息技术与安全科学引用本文复制引用
许仕杰,喻锟,曾祥君,贺世庚,邓清波..基于线电压组合调控的配电网单相接地故障消弧与保护方法[J].南方电网技术,2025,19(12):100-111,12.基金项目
国家自然科学基金资助项目(52037001) （52037001）
湖南省教育厅资助项目(22A0231) Supported by the National Natural Science Foundation of China(52037001) （22A0231）
Hunan Provincial Education Department Funding(22A0231). （22A0231）
