基于对称复镜象法接地网接地电阻的算法  

Algorithm Based on the Symmetry Complex Image Method for the Resistance of Grounding Grids

作　　者：王新翠[1] 彭敏放[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《现代电子技术》2007年第9期143-145,共3页Modern Electronics Technique

基　　金：湖南省电力科研基金项目(20061001);湖南省科技计划项目(05FJ3008);湖南省自然科学基金项目(04JJ6034);湖南省电力科研基金(20023009)

摘　　要：对称复镜象法是一种适用于非均匀土壤中任意结构接地网接地参数精确计算的新方法。但是在应用对称复镜象法计算接地网接地电阻时,需要假定总的泄漏电流,由此得出每个单元的泄漏电流和地网电位升,进而得到地网接地电阻。本文基于此提出了一种新的优化算法,将对称复镜象法与直接矩阵法结合,在考虑了地网电阻系数矩阵的对称性的基础上通过矩阵变换直接求出接地电阻,不必假设总的泄漏电流,从而节省了计算时间,并提高了计算精度。The symmetry complex image method is recently used to calculate accurate grounding parameter of grounding systems with any form in non - homogeneous soil. But when symmetry complex image method is applied in the calculation of grounding grids resistance, it is to first calculate the total fault current of the grid and then obtain the fault current of every element and achieve the grid resistance. This paper approaches a new method to calculate the grounding grid resistance. It is unnecessary to calculate the element fault current, but through alternating the resistance coefficient matrix directly to acquire the resistance of ground grids. As a result, the computing time can be shortened and the precision is improved.

关 键 词：对称复镜象法 接地电阻 泄漏电流 电位 直接矩阵变换 接地网 

分 类 号：TM13[电气工程—电工理论与新技术]