750 kV断路器合闸电阻三相阻值差异性对过电压的影响  

Influence of Difference of Three-phase Resistance of Closing Resistor of 750 kV Circuit Breaker on Overvoltage

作　　者：宋朝晖 李振强 娄颖 查志鹏 SONG Zhaohui;LI Zhenqiang;LOU Ying;ZHA Zhipeng(Northwest Branch of State Grid Corporation of China,Xi’an 710050,China;State Key Laboratory of Power Grid Environmental Protection,Wuhan 430074,China;China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]国家电网有限公司西北分部,西安710050 [2]电网环境保护国家重点实验室,武汉430074 [3]中国电力科学研究院有限公司,武汉430074

出　　处：《高压电器》2024年第11期154-159,168,共7页High Voltage Apparatus

摘　　要：不同的线路断路器合闸电阻阻值差异对过电压的影响已有不少研究,但三相断路器合闸电阻阻值之间的不同对过电压的影响鲜有研究,而实际运行中由于备用相断路器与在运设备合闸电阻值不一致就会出现这种情况。因此,有必要分析三相断路器合闸电阻之间阻值存在差异时,合闸线路操作过程中可能存在的过电压风险。考虑不同的研究条件,计算分析了600/600/570Ω、425/425/570Ω、0/0/570Ω、1 500/1 500/570Ω4种750 kV断路器合闸电阻配置方案下的线路合闸和单相重合闸过电压,研究结果可为线路断路器优化配置和安全运行提供技术依据。The study on influence of difference of resistance of closing resistor of circuit breaker on overvoltage is more,but study on influence of difference of resistance of closing resistors of three-phase circuit breaker on overvoltage is less.In actual operation,this situation will occur due to the inconsistency of the closing resistance between the standby phase circuit breaker and the operating equipment.Therefore,it is necessary to analyze the risk of overvoltage possibly existed in the operation of the closed line in case of difference in the resistance of closing resistor of three-phase circuit breaker.The line closing and single-phase re-closing overvoltage under such four closing resistance schemes/mode of 750 kV circuit breaker as 600/600/570 Ω,425/425/570 Ω,0/0/570 Ω and 1 500/1 500/570 Ωare studied and analyzed.The study results can provide technical basis for optimized configuration and safe operation of circuit breaker.

关 键 词：750 kV 线路断路器 合闸电阻 过电压 

分 类 号：TM561[电气工程—电器]