220kV线路空载合闸工频电压升高、母线侧隔离开关A相接地故障分析  

Analysis of No-load Closing Frequency Voltage Rise and Bus-side Disconnect Switch Phase A Ground Faults on 220 kV Line

作　　者：孙德洲 张全元 董占翔 梁志磊 亢歆童 SUN Dezhou;ZHANG Quanyuan;DONG Zhanxiang;LIANG Zhilei;KANG Xintong(State Grid Liaoning Electric Power Co.,Ltd.Dalian Power Supply Company,Liaoning Dalian 116400,China;Retired staff of State Grid Hubei Electric Power Co.Ltd.UHV Company,Hubei Wuhan 430070,China;Shandong Taikai High Voltage Switchgear Co.,Ltd.Shandong Tai'an 271000,China;Wuhan University of Technology,Hubei Wuhan 430070,China)

机构地区：[1]国网辽宁省电力有限公司大连供电公司,辽宁大连116400 [2]国网湖北省电力有限公司超高压公司,湖北武汉430070 [3]山东泰开高压开关有限公司,山东泰安271000 [4]武汉理工大学,湖北武汉430070

出　　处：《农村电气化》2024年第5期46-52,共7页Rural Electrification

摘　　要：工频电压升高到1.4倍运行在电网中属罕见,各等级电网电压由各级调度按所辖范围负责调整,电网在正常运行时不可能出现工频电压升高现象。本案例属于新设备投产,其220 kV母线电压不在电网调度监视点范围,工频电压升高运行9min31 s,同时由于母线侧隔离开关合闸不到位,致使母线侧GIS隔离开关气室爆炸;由于线路并联电抗器匝间保护误整定,导致该保护动作。Frequency voltage rise to 1.4 times operation in the power grid is rare,all levels of grid voltage by all levels of scheduling according to the jurisdiction of the scope of responsibility for the adjustment,the grid in normal operation is not likely to be the phenomenon of frequency voltage rise.This case belongs to the new equipment put into operation,its 220 kV bus voltage is not in the range of grid scheduling monitoring point,industrial frequency voltage rise operation 9 minutes 31 seconds,at the same time,due to the bus-side isolation switch closing is not in place,resulting in the bus-side GIS isolation switch gas chamber explosion;due to the line shunt reactor turn-to-turn protection error adjustment,resulting in the action of the protection.

关 键 词：工频过电压 高频电流 衰减 波形 电抗器 

分 类 号：TM727[电气工程—电力系统及自动化]