面向架空线路搭接处发热的非损伤式预防装置研究  

Research on Non-Destructive Preventive Device for Overheating at the Joint of Overhead Lines

作　　者：王少帅 李航 周福刚 赵普 梁宏杰 陈博 段佳乐 WANG Shaoshuai;LI Hang;ZHOU Fugang;ZHAO Pu;LIANG Hongjie;CHEN Bo;DUAN Jiale(State Grid Suzhou Power Supply Company,Suzhou 215004,China;Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]国网江苏省电力有限公司苏州供电分公司,江苏苏州215004 [2]南京工程学院,江苏南京211167

出　　处：《湖南电力》2025年第2期88-94,共7页Hunan Electric Power

基　　金：2024年国网江苏省电力有限公司面向生产一线的科技项目包(苏州公司)(SGTYHT/23-JS-001)。

摘　　要：针对架空输电线路搭接处普遍存在的发热问题,通过精确测量接触电阻,探究线路送电后的发热风险,及对开尔文双臂电桥桥臂电阻参数选定等问题。结合仿真计算,通过有、无接地回路的对照实验,验证接地回路不会对测量结果造成影响。在预防发热准确率实验中,装置的均衡得分为88.88%,召回率为100%,表明该装置在预防耐张线夹发热问题上具有较高的准确率。除此之外,该装置在检测时无须拆除搭接处的线夹金具,可避免对设备造成不必要的损伤,确保检测过程高效、安全。In view of the common heat generation problem at the joints of overhead transmission lines,by measuring the contact resistance,the heating risk of the line after power is transmitted is explored,and the selection of Kelvin double-arm bridge arm resistance parameters and other issues researched.Through control experiments with and without grounding loops,combined with simulation calculations,it is verified that the grounding loop will not affect the measurement results.In the accuracy experiment of preventing heating,the device's balanced score is 88.88%,and the recall rate is 100%,proving that the device has a high accuracy in preventing the heating problem of tension-resistant clamps.In addition,the advantage of the device is that there is no need to remove the wire clamp hardware at the joint during the detection process,thereby avoiding unnecessary damage to the equipment and ensuring the efficiency and safety of the detection process.

关 键 词：开尔文电桥 接触电阻 搭接处发热 架空线路 微欧计 

分 类 号：TM755[电气工程—电力系统及自动化]