Experimental Analysis on Influence of Temperature and Bolted Torque to DC Contact Resistance of Terminal Connector in UHV Valve Hall  

作　　者：Jiajun Si Xiaoming Rui Jingchao Wang Bin Liu Shengchun Liu 

机构地区：[1]School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China [2]China Electric Power Research Institute,Beijing 100192,China

出　　处：《CSEE Journal of Power and Energy Systems》2020年第4期858-866,共9页中国电机工程学会电力与能源系统学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(51678548);the Science and Technology Project of the State Grid Corporation of China(GC71-16-003).

摘　　要：The overheating problems of terminal connectors severely threaten the operation of ultra-high voltage projects and cause enormous losses of economy,so a higher currentcarrying reliability of the connectors has an important engineering significance with the development of transmission capacity.In this paper,a bivariate mathematical model of contact resistance as functions of temperature and tightening torque was deduced based on the large current temperature rise tests.To perform such analysis,four typical terminal connectors,namely:overlapping terminal of aluminum plates,overlapping terminal of copper plates,overlapping terminal of plates with clad layer and overlapping terminal of copper rod with aluminum clamp,were chosen for the experiments.The changing rules of DC resistance with different tightening torques and different currents were studied.Then the empirical formula of contact resistance was deduced.Finally,temperature calculations of different terminal connectors were realized to verify the effectiveness of the bivariate mathematical model.

关 键 词：DC contact resistance empirical parameter large current temperature rise test terminal connector UHV converter station 

分 类 号：TM712[电气工程—电力系统及自动化]