基于两步有限差分时域法的输电线路雷电感应电压分析方法研究  

Research on Lightning Induced Voltage Analysis Method for Transmission Lines Based on Two-Step Finite Difference Time Domain Method

作　　者：邓伟 姚国风 李天杰 马娜 DENG Wei;YAO Guofeng;LI Tianjie;MA Na(Beijing Guodiantong Network Technology Co.,Ltd.,Beijing 100070,China)

机构地区：[1]北京国电通网络技术有限公司,北京100070

出　　处：《电瓷避雷器》2020年第6期36-40,51,共6页Insulators and Surge Arresters

基　　金：国家电网公司总部科技项目(编号:52110118008H)。

摘　　要：为了降低计算难度,同时兼顾架空线路以及地埋线路的计算,笔者提出了一种新的高效的两步有限差分时域(FDTD)分析输电线路(TL)雷电感应电压方法。该方法包括两个步骤,第一步使用二维FDTD方法计算垂直闪电通道辐射的电磁场,并照亮附近的TL。第二步使用三维FDTD方法计算TL的电磁响应,该响应由在连接三维空间边界的总场-散射场中添加的入射电磁场照亮。为了验证所提出的两步FDTD方法,将两步FDTD方法计算结果与Agrawal耦合模型计算结果及三步FDTD方法计算结果进行比较,发现两步FDTD方法在分析TL上的雷电感应电压方面具有较高的计算效率。In order to reduce the computational difficulty and take into account the calculation of overhead lines and buried lines,a new efficient two-step finite difference time domain( FDTD) method is proposed to analyze lightning induced voltage of transmission lines( TL). The method consists of two steps.The first step is to use two-dimensional FDTD method to calculate the electromagnetic field radiated by the vertical lightning channel and illuminate the nearby TL. The second step is to calculate the electromagnetic response of TL using the three-dimensional FDTD method,which is illuminated by the incident electromagnetic field added to the total field-scattering field connecting the three-dimensional space boundary. In order to verify the proposed two-step FDTD method,the results of two-step FDTD method and Agrawal coupling model are compared,and compared with the results of three-step FDTD method. The two-step FDTD method is more efficient in analyzing lightning induced voltage on TL.

关 键 词：有限差分时域 二维 三维 输电线路 Agrawal耦合模型 雷电感应 电磁响应 

分 类 号：TM863[电气工程—高电压与绝缘技术]