750kV罐式断路器合闸电阻操动冲击下应力分布数值模拟及影响因素分析  

Stress Distribution Numerical Simulation and Influencing Factor Analysis of Stress Under Operating Shock of Pre⁃insertion Resistor of 750 kV Dead Tank Circuit Breaker

作　　者：刘康 温定筠 包艳艳 丘子诚 李斯盟 汲胜昌[2] LIU Kang;WEN Dingyun;BAO Yanyan;QIU Zicheng;LI Simeng;JI Shengchang(State Grid Gansu Electric Power Co.,Ltd.Electric Power Research Institute,Lanzhou 730070,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,兰州730070 [2]西安交通大学电力设备与电气绝缘国家重点实验室,西安710049

出　　处：《高压电器》2023年第8期180-185,共6页High Voltage Apparatus

基　　金：国家电网有限公司科技项目(5500⁃202333113A⁃1⁃1⁃ZN)。

摘　　要：作为断路器中的关键组件,断路器合闸电阻在长期运行的过程中会承受巨大的机械和电流冲击,可能造成合闸电阻乃至断路器设备发生损坏。基于此,文中以典型LW13-800型罐式断路器为研究对象,建立了断路器合闸电阻数值仿真模型,计算了操动冲击力作用下合闸电阻的应力分布,分析了不同优化设计中的影响因素对合闸电阻应力的影响。研究结果表明:在同一电阻串上,最底端电阻片所受应力最大;合闸电阻串平均应力与操动冲击波形大致吻合;合闸电阻所受应力的平均值与操动冲击载荷呈正比例关系;在加装了纯铝过渡片后,可以对电阻串两端电阻片应力分布起到一定程度的改善。The pre-insertion resistor,as the key part of circuit breaker,can withstand huge mechanical and current impulse in the term operation,may cause the damage of the pre-insertion resistor and even circuit breaker.Based on this,the typical LW13-800 dead tank circuit breaker is taken as the research object in this paper,a numerical simu-lation model for the pre-insertion resistor of the circuit breaker is set up and the stress distribution of the pre-inser-tion resistor under the action of operating shock force is calculated,and the influence of different influencing factors on the stress of the pre-insertion resistor is analyzed.The research results show that on the same resistor string,the stress withstood by the bottom resistor is the highest.The average stress of the pre-insertion resistor string is roughly in agreement with the operating shock waveform.The average stress on the pre-insertion resistor is positively propor-tional to the operating shock load.After installing pure aluminum transition pieces,the stress distribution of the re-sistor discs at both ends of the resistor string can be improved to a certain extent.

关 键 词：罐式断路器 合闸电阻 应力分布 优化设计 变化规律 

分 类 号：TM561[电气工程—电器]