地面上方水平载流导体空间辐射场的快速计算  

Fast Algorithm for Calculating Electromagnetic Field Produced by Horizontally Placed Current Conductor Above Lossy Ground

作　　者：蒋陶宁[1] 康东升[1] 胡选[1] 邹军[2] 王雅婷[3] 

机构地区：[1]国核电力规划设计研究院,北京市西城区100032 [2]清华大学电机系,北京市海淀区100084 [3]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2011年第18期119-123,共5页Proceedings of the CSEE

摘　　要：地面上方水平载流导体产生的空间辐射电磁场的计算是电磁兼容研究的基础问题之一,其本质是广义索末菲尔德积分的计算。提出一种由抽取积分函数渐近项的方法快速求解广义索末菲尔德积分的计算方案,借助指数积分得到了广义索末菲尔德积分渐近项的闭式解。通过数值算例验证了该计算方案的正确性,而且该方案相比直接积分方法,可提高计算效率达3倍以上。文章最后计算了一段水平载流导体产生的空间辐射场,并且通过和Bannister近似公式比较,说明了该方法对索末菲尔德积分的参数无特殊要求,是一种通用的计算方法。The evaluation of electromagnetic fields radiated by horizontal carrying current conductors above the lossy ground is one of the most important subjects on electromagnetic compatibility, and can be expressed by the well-known generalized sommerfeld integral. A fast algorithm for calculating the fields called asymptotic extraction technology was presented with the help of the exponential integral. Comparing with the directly numerical integration method the computation efficiency of the proposed algorithm is 3 times faster. This paper also calculated the electromagnetic field produced by a horizontal carrying current conductor above the lossy ground, which demonstrated that this algorithm has a wider range of application than the Bannister approximate formula has.

关 键 词：广义索末菲尔德积分 渐近抽取技术 指数积分 水平载流导体 快速算法 

分 类 号：TM85[电气工程—高电压与绝缘技术]