一起110 kV线路发展性故障导致220 kV主变保护动作的事故分析  

Analysis on an Accident of 110 kV Main Transformer Protection Action Caused by a Developmental Fault on a 110 kV Line

作　　者：黄岗 邓德茂 彭洪进 王开波 王堃 金基伟 HUANG Gang;DENG Demao;PENG Hongjin;WANG Kaibo;WANG Kun;JIN Jiwei(Zunyi Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Guizhou Zunyi 563000,China)

机构地区：[1]贵州电网有限责任公司遵义供电局,贵州遵义563000

出　　处：《农村电气化》2023年第7期16-18,共3页Rural Electrification

摘　　要：220 kV某变电站1号主变电站压器保护装置中后备接地阻抗1时限保护动作跳开110 kV母联110开关,同时110 kV某线保护装置零序过流Ⅱ段、距离Ⅱ段保护动作,重合闸成功后距离Ⅱ段再次动作跳开该线路开关,造成110 kV某牵引变全站失压,降低了电网的供电可靠性。详细分析了110 kV线路发生发展性故障导致220 kV主变保护动作的原因并提出了整改建议。The backup grounding impedance protection of the 1#main transformer in a certain 110 kV station tripped the 110 kV buscouple breaker with the first time limit action.At the same time,the zero sequence overcurrent sectionⅡand distance sectionⅡprotection of a 110 kV line were activated.After successful reclosing,the distance sectionⅡtripped the line breaker again,causing a voltage loss in the entire station and reducing the power supply reliability of the power grid.This article provides a detailed analysis of the reasons for the protective action of the 110 kV main transformer caused by developmental faults on the 110 kV line and proposes rectification suggestions.

关 键 词：发展性故障 供电可靠性 全站失压 

分 类 号：TM773[电气工程—电力系统及自动化]