考虑配电网故障隔离的单相接地保护整定计算  

Setting Calculation of Single-phase Grounding Protection Considering Distribution Network Fault Isolation

作　　者：孟乐 李俊刚 宋祺鹏 石岩 Meng Le;Li Jungang;Song Qipeng;Shi Yan(XJ Group Research and Development Center,Xuchang Henan 461000,China;State Grid Shanghai Energy Internet Research Institute Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]许继集团研发中心,河南许昌461000 [2]国网上海能源互联网研究院有限公司,上海200135

出　　处：《电气自动化》2023年第3期95-98,102,共5页Electrical Automation

基　　金：国家电网公司科技项目“面向数字化转型的自主可控配电测控保护一体化设备关键技术研究及应用”(5500-202055466A-0-0-00)。

摘　　要：单相接地故障严重威胁着配电网的安全可靠运行,快速隔离故障对提高配电网的供电可靠性具有重要意义。为实现配电网单相接地故障的精确隔离,需对单相接地保护进行合理的整定。分析了单相接地保护原理、故障点过渡电阻、配电网拓扑结构及故障处理策略等因素对单相接地保护定值整定的影响,提出了典型配电线路单相接地保护定值的整定原则和灵敏度校验方法,可提升配电网的单相接地故障处理能力。The single-phase grounding fault seriously threatens the safe and reliable operation of the distribution network,and the rapid isolation of the fault is of great significance to improve the reliability of the power supply of the distribution network.In order to achieve accurate isolation of single-phase grounding faults in distribution network,it is necessary to make reasonable settings for single-phase grounding protection.The influence of factors such as single-phase grounding protection principle,fault point transition resistance,distribution network topology structure and fault handling strategy on the setting of single-phase grounding protection were analyzed,and the setting of single-phase grounding protection for typical distribution lines was proposed.The principle and sensitivity verification method can improve the single-phase-to-ground fault handling capability of the distribution network.

关 键 词：配电线路 单相接地保护 整定计算 灵敏度 馈线自动化 

分 类 号：TM773[电气工程—电力系统及自动化]