雷击杆塔塔顶雷电反击过电压仿真分析  

Simulation Analysis of Lightning Back Strike Overvoltage on the Top of Tower Top

作　　者：王国平 邓佃毅 宁海波 WANG Guoping;DENG Dianyi;NING Haibo(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》2021年第17期133-135,140,共4页Electric Engineering

摘　　要：为了分析研究雷击杆塔塔顶雷电反击过电压的影响因素,在查阅大量文献的基础上,通过对不同雷电流波形的对比,结合杆塔、线路、绝缘子实际情况,以一段实际线路和实际杆塔参数为例,利用PSCAD/EMTDC仿真软件建立了符合实际情况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、绝缘子闪落判据模型。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雷击杆塔塔顶反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反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 strikes the top of the tower and strikes back at overvoltage,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,taking a section of actual line and actual tower parameters as an example,the PSCAD/EMTDC simulation software is used to establish a lightning 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 counterattack overvoltage transient characteristics of the lightning current waveforms and amplitudes in the case of Lightning strikes the top of the tower,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 counterattack overvoltage and lightning withstand level,which can provide a theoretical basis and an important reference for future lightning protection work.

关 键 词：反击 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]