交流高压输电线路下人与车辆接触时稳态电流计算  

Calculation of Steady-state Current During Contact of People and Vehicles Under AC High-voltage Transmission Line

作　　者：姜玲 郑中原[1] 高建政 郝春艳[1] 刘彤 邹军[3] JIANG Ling;ZHENG Zhongyuan;GAO Jianzheng;HAO Chunyan;LIU Tong;ZOU Jun(State Grid Tianjin Electric Power Company Electric Power Research Institute,Tianjin 300384,China;Tianjin Radiation Environment Management Institute,Tianjin 300191,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]天津市辐射环境管理所,天津300191 [3]清华大学电机工程与应用电子技术系,北京100084

出　　处：《高压电器》2021年第11期60-65,共6页High Voltage Apparatus

基　　金：国网天津市电力公司科技项目(KJ19-1-18)资助。

摘　　要：交流高压输电线路下停有客车时,人触碰客车的金属表面时产生的接触电流对人的身心健康造成影响。求解接触电流的大小可以给交流高压输电线路的设计以及相应的安全规则提供重要指导意义。文中提出了一种计算交流高压输电线路下人与客车稳态接触电流的数值方法。该方法基于互易定理求出客车的开路电压,使得输电线路电场的计算不受客车停车位置的影响,同时大大减少了计算量。然后构造人与客车接触时的等效电路,计算了稳态接触电流的大小并进行参数影响分析。文中所作的工作是进一步计算交流输电线路下客车安全停车距离以及停车场附近输电线路高度设计的基础。When a coach is parked under I he AC high voltage transmission line,the contact current generated when people touches the metal surface of the coach will affect people*s physical and mental health.Solving the magnitude of contact current can provide important guidance for the design of AC high voltage transmission lines and the corre-sponding safety rules.A kind of numerical method for calculating the steady contact current between people and coach under the AC high voltage transmission line is proposed in this paper.The method is based on the reciprocity theorem to calculate the open circuit voltage of the coach,which makes the calculation of the electric field of the transmission line free from the parking position of the coach and,at the same time,greatly reduces the calculation amount.Then,the equivalent circuit when human contacts with coach is constructed,the magnitude of steady contact current is calculated and the parameter influence analysis is performed.The work done in this paper is the base in calculating further the safe parking distance of the coach under the AC transmission line and the height design of transmission line near the parking lot.

关 键 词：表面电荷法 高斯积分 悬浮导体 互易定理 Ansys 

分 类 号：TM75[电气工程—电力系统及自动化]