500kV线路单相瞬时性接地故障串补重投不一致的保护动作分析  

Analysis of Inconsistent Protection Action for Re-closing of Series Compensation of Single Phase Transient Ground Fault of 500 kV Line

作　　者：王俊平 仉莹 杨一夫 吴俊敏 周雷 WANG Junping;ZHANG Ying;YANG Yifu;WU Junmin;ZHOU Lei(Qiqihar Operation and Maintenance Branch,Ultra High Voltage Company,State Grid Heilongjiang Electric Power Co.,Ltd.,Heilongjiang Qiqihar 161000,China;Dalian Minzu University,Liaoning Dalian 116600,China)

机构地区：[1]国网黑龙江省电力有限公司超高压公司齐齐哈尔运维分部,黑龙江齐齐哈尔161000 [2]大连民族大学,辽宁大连116600

出　　处：《电力电容器与无功补偿》2022年第5期35-41,共7页Power Capacitor & Reactive Power Compensation

摘　　要：针对某500kV带有串补装置线路瞬时性单相接地故障过程中的零序后加速保护动作,重合不成功,依据相关重合闸后加速原理及串补装置结构的特殊性,结合保护动作、录波数据和SOE记录,分析了造成重合闸误动原因,进而深入分析可控串补装置及固定串补装置重投动作行为的不一致原因,同时对串补装置重控制投逻辑更加明晰。在此基础上,提出了优化保护控制程序、修改保护动作逻辑,调整保护定值等解决的建议,为设计与运行中串补站保护配置和运维的借鉴经验。In view of such issues aszero sequence post acceleration protection action and unsuccessful reclosing operation of 500 kV line with series compensation device during transient single phase ground fault,the cause of reclosing mal-operation is analyzed in accordance with related acceleration post acceleration principle and structural particularity of series compensation device in combination with protection action,recording data as well as SOE record.The cause of inconsistent re-switching of both thyristor controlled and fixed series compensation devices are analyzed further.At the same time,the re-control logic of the series compensation device is more clear.On this basis,the suggestion of such solutions as optimizing protection control procedure,modifying the protection action logic and adjusting the protection settings are proposed,which provide reference experience for protection configuration,operation and maintenance of the series compensation station in the design and operation.

关 键 词：单相重合闸 固定串补(FSC) 可控串补(TCSC) 后加速保护 分析 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM762.2