摘要
为解决用传统边界元法求解某些大型地网接地参数时需要的存储量过大而导致普通计算机因内存的限制无法进行求解的问题,提出用快速多极子边界元法求解地网接地参数,利用树的存储结构代替传统的系数矩阵存储形式,减少计算存储量,提高了计算效率。通过求解规模较小地网的接地参数对传统边界元和快速多极子边界元进行比较,快速多极子边界元法计算出的接地电阻值与CDEGS软件的计算值最大误差在2%以内,表明该方法的有效性。利用该方法对传统边界元法及CDEGS软件无法求解的工程算例进行求解,计算出的相关接地参数初步满足工程要求。
In the solution of grounding parameters of a certain large-scale grounding grids by traditional boundary element method（BEM）,the required memory space for this task far exceeds the memory space of the common computer,so that this problem cannot be solved.It is proposed to solve grounding parameters of grounding grid by fast multipole BEM,and quadtree memory structure is utilized to replace traditional storage schema based on coefficient matrix,thus the memory capacity for the calculation is reduced and the computational efficiency is improved.Taking the solution of grounding parameters of grounding grid with relatively small scale by traditional BEM and fast multipole BEM respectively as example,the computational results comparison shows that the maximum error of grounding resistance calculated by fast multipole BEM and that by CDEGS software are less than 2%,so it shows that the proposed method is effective.Applying the proposed method to engineering case,which cannot be solved by both CDEGS software and traditional BEM,the obtained related grounding parameters can preliminarily meet the engineering requirement.
出处
《电网技术》
EI
CSCD
北大核心
2013年第3期753-758,共6页
Power System Technology
基金
国家重点基础研究发展计划项目(973项目)(2009CB724500)~~
关键词
传统边界元法
快速多极子边界元法
接地参数
地网
存储量
traditional boundary element method
fast multi-pole boundary element method
grounding parameter
grounding grid
memory
