输电线路雷电绕击过电压仿真分析研究  

Study on Simulation Analysis of Lightning Overvoltage of Shielding Failure in Transmission Lines

作　　者：王国平 邓佃毅 董鹏程 WANG Guoping;DENG Dianyi;DONG Pengcheng(Inner Mongolia Electric Power(Group)Co.,Ltd.,Ulanqab 012000,China)

机构地区：[1]内蒙古电力(集团)有限责任公司,内蒙古乌兰察布012000

出　　处：《电工技术》2020年第13期115-119,共5页Electric Engineering

摘　　要：为了分析研究影响输电线路绕击雷电过电压的因素,在查阅大量文献的基础上,通过对不同雷电流波形的对比研究,结合杆塔、线路、绝缘子实际情况,利用PSCAD/EMTDC仿真软件建立了2.6/50μs的雷电流双指数模型、杆塔单一波阻抗模型、线路Frequency Dependent(Phase)模型、绝缘子闪络判据模型。在所建模型的基础上,利用PSCAD/EMTDC软件仿真分析了雷电流波形和幅值在绕击情况下的雷电过电压暂态特征,以及对雷电过电压和耐雷水平的影响。仿真结果表明雷电流波形和幅值对绕击过电压和耐雷水平有较大影响,可为日后的防雷工作提供理论依据及重要参考。In order to analyze and study the influencing factors of lightning overvoltage of shielding failure in transmission lines,based on consulting a large number of literature,through the comparative study of different lightning current waveforms,and in combination with the practical situation of tower,cable,insulator,this paper uses the PSCAD/EMTDC simulation software to establish a 2.6/50 μslightning current double exponential model,a tower single wave impedance model,a line Frequency Dependent(Phase)model,and an insulator flash fall criterion model.On the basis of the model built,the PSCAD/EMTDC software is used to simulate and analyze the lightning overvoltage transient characteristics of the lightning current waveforms and amplitudes in the case of shielding failure,and its influence on the lightning overvoltage and lightning withstand level.The simulation results show that the waveform and amplitude of lightning current have a greater influence on the overvoltage and lightning withstand level,which can provide a theoretical basis and an important reference for future lightning protection work.

关 键 词：绕击 雷电过电压 耐雷水平 仿真建模 

分 类 号：TM866[电气工程—高电压与绝缘技术]