关于取消新疆电网750 kV断路器合闸电阻可行性的仿真研究  

Simulation research on feasibility of cancelling closing resistance of 750 kV circuit breakers in Xinjiang power grid

作　　者：王圣凯 赵洪峰[1] WANG Shengkai;ZHAO Hongfeng(School of Electrical Engineering,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830017

出　　处：《现代电子技术》2024年第2期105-109,共5页Modern Electronics Technique

基　　金：国家自然科学基金项目(51762038)。

摘　　要：目前,超、特高压输电线路常用合闸电阻吸收能量,并将其作为限制合闸过电压的主要手段,但是带有合闸电阻的断路器不仅造价昂贵,而且还存在运行可靠性差、故障率高等缺点,如果能利用低残压、保护性能优异的金属氧化物避雷器替代合闸电阻来限制操作过电压,不仅可以降低成本,还能简化断路器操纵机构以提高电力系统运行的可靠性。文中以新疆电网最长距离的750 kV线路为研究对象,通过沿线安装多组避雷器的方式,将沿线最大2%合闸过电压限制到规程规定的1.8 p.u.以内,为新疆电网所有750 kV长距离线路取消断路器合闸电阻的可行性提供了理论依据。The energy absorption of closing resistors is commonly used in ultra‐high voltage and ultra‐high voltage transmission lines,and it also taken as the main means of limiting closing overvoltage.However,circuit breakers with closing resistors are not only expensive in cost,but also have disadvantages such as poor operational reliability and high failure rate.If metal oxide lightning arresters with low residual voltage and excellent protection performance can be used to replace closing resistors to limit operating overvoltage,it can not only reduce costs,but also simplify the circuit breaker control mechanism to improve the reliability of power system operation.Taking the longest distance 750 kV line in Xinjiang power grid as the research object,the maximum 2%closing overvoltage along the line is limited to within 1.8 p.u.specified in the regulations by installing multiple sets of lightning arresters along the line.It can provide a theoretical basis for the feasibility of canceling the closing resistance of circuit breakers for all 750 kV long‐distance lines in Xinjiang power grid.

关 键 词：金属氧化物避雷器 断路器合闸电阻 操作过电压沿线分布 操作过电压 合闸过电压 单相自动重合闸 

分 类 号：TN386‐34[电子电信—物理电子学] TM864[电气工程—高电压与绝缘技术]