变电站开关瞬态电磁场数值计算方法  

Numerical Method of Switching Transient Electromagnetic Field in Substation

作　　者：王泽忠[1] 李云伟[2] 徐迪[2] 柳华[2] 王一哲[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]国核电力规划设计研究院,北京市西城区100032

出　　处：《中国电机工程学报》2009年第28期18-22,共5页Proceedings of the CSEE

基　　金：国家杰出青年科学基金项目(50325723)~~

摘　　要：为研究变电站内开关瞬态电磁场的发生机制和分布规律,基于时域有限差分法(finite-difference time-domain method,FDTD)建立了开关瞬态场的时域仿真模型。在该模型中引入火花放电通道的时变电阻和电感概念,通过拟合典型变电站开关瞬态场实测波形获得了开关电弧放电通道的时变电阻修正公式。利用建立的时域仿真模型仿真了隔离开关切合空载母线和设备连线时产生的开关瞬态场,与实测波形的比较表明两者吻合较好,该模型能够有效地仿真开关瞬态电磁场。时域模型为超/特高压变电站电磁干扰研究提供了一种有效途径。In order to study occurring mechanism and the distribution rule of switching transient electromagnetic field in substation, time-domain simulation model of which was constituted on the basis of finite-difference time-domain method （FDTD） in this paper. Time-dependent resistance and inductance concept of arc discharging channel were introduced, an improved time-dependent resistance of arc discharging channel was achieved by fitting the measured datum of switching transient field in typical substations. Using the improved time-dependent resistance and inductance of arc discharging channel, switching transient electromagnetic fields were simulated when the disconnecting switch operates the busbars without load and connecting line between equipment in substation. Simulated waveforms are in accordance with measured waveforms, which indicates the time-domain model is effective for investigating switching transient field, and it can be used to study electromagnetic interference in EHV and UHV substation.

关 键 词：变电站 开关瞬态场 时变电阻 时域有限差分法 电磁干扰 

分 类 号：TM154.1[电气工程—电工理论与新技术] TM564