变电站非承流结构金具异常发热缺陷模拟分析  

Simulation Analysis of Abnormal Heating Defects of Non⁃Current Carrying Structure Fittings in Substation

作　　者：王英杰 陈波 刘琦 谢明佐 于鲜莉 赵子建 王磊 WANG Yingjie;CHEN Bo;LIU Qi;XIE Mingzuo;YU Xianli;ZHAO Zijian;WANG Lei(Inner Mongolia Power(Group)Co.,Ltd.,Inner Mongolia Electric Power Research Institute Branch,Hohhot 010020,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,呼和浩特010020

出　　处：《内蒙古电力技术》2024年第2期61-67,共7页Inner Mongolia Electric Power

基　　金：内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司青年科技人员支持计划项目“蒙西地区一次设备典型电流致热缺陷成因识别与运维策略研究”(2023-QK-08)。

摘　　要：针对一起变电站连接金具发热缺陷,对该类型结构的常见发热缺陷做了分析,并基于Matlab软件仿真模拟了该特殊缺陷的产生过程。以引流线夹故障为例,假设故障线夹处接触电阻Rj1在0.001~0.8Ω变化,电阻变化步长设置为0.005Ω,运行电流有效值为280 A。由仿真结果可看出,当线夹某处发生故障时,随着其电阻值的变化,该处发热功率P_(j1)呈先增后减的趋势,而门型架构侧连接金具热功率P_(l1)呈现单调增加的趋势,最后表现出P_(l1)远大于P_(j1)的现象。仿真验证在特定的故障参数下,实际故障部位可能会引起其他部位的发热,而其本身发热现象可能不明显。对此,提出了对于该类型缺陷的单独分类方式和针对该类故障的跟踪处理方式,为同类型站内金具发热故障的处理提供参考。In response to a special heating defect of substation connecting fittings,this paper analyzes the common heating defects of this type of structure,and simulates the generation process of this special defect based on MATLAB software.Taking the fault of jumper conductor clamper as an example,it is assumed that the contact resistance value Rj1 at the fault line clamp varies between 0.001Ωand 0.8Ω,with a resistance change step size of 0.005Ω,and the effective value of the operating current is 280 A.The simulation results show that when a fault occurs at a certain point of the clamp,as the resistance value changes,the heating power P_(j1) at that point first increases and then decreases,while the thermal power P_(l1) of the connection fittings on the gate⁃type frame of the outgoing line shows a monotonic increasing trend,finally showing that P_(l1) is much greater than P_(j1).Simulation verification shows that under specific fault parameters,the actual fault location may cause heating in other areas,while its own heating phenomenon may not be obvious.In this regard,a separate classification method for this type of defect and a tracking treatment method for this type of fault are proposed,providing technical ideas for the treatment of heating faults in fittings in the same type of station.

关 键 词：变电站 发热缺陷 连接金具 电流致热 接触电阻 

分 类 号：TM63[电气工程—电力系统及自动化]