边界元法在块状土壤结构接地中的应用研究  

Research on Applying Boundary Element Method to Grounding Grid in Soil With Massive Texture

作　　者：郭卫[1] 李晓萍[1] 文习山[1] 邢鹏翔[1] 姜志鹏[1] 王羽[1] 谭波[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2013年第5期1414-1419,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)~~

摘　　要：目前通常用直接边界元法和间接边界元法对块状土壤接地问题进行研究,但对这2种方法进行对比研究却鲜见报道。对地网处在块状土壤区域中的接地模型分别用直接边界元法和间接边界元法法进行原理推导,通过与接地软件CDEGS的计算结果进行对比表明2种方法及编程原理的正确性;计算结果表明在相同边界剖分方式下,直接边界元法在求解该块状土壤接地模型时需要的剖分单元数量比间接边界元法需要的剖分单元数量更少,而且随着块状土壤厚度的减小,直接边界元法在剖分数量上的优势更加明显且计算结果更加稳定。最后运用直接边界元法对较为复杂的块状土壤接地模型进行计算,计算结果对实际接地工程应用提供了参考。At present the direct boundary element method and indirect boundary element method are usually applied to the research on grounding grid in the soil with massive texture, however the comparative stuay on the application of the two methods is rarely reported. Based on direct boundary element method and indirect boundary element method, theoretical models of grounding grid in the soil with massive texture are deduced respectively, and the results of comparing the deduced models with the computing result by ground software CDEGS show that the two methods and the programming principles applied to them are correct. Computing results show during the solution of grounding model in the soil with massive texture under the same boundary dividing way the amount of subdivision units needed by direct boundary element method is less than that needed by indirect boundary element method, and with the decrease of the thickness of the soil with massive texture, the superiority of direct boundary element method in the needed amount of subdivision units behaves more evidently and the computing results are more stable. Finally, the direct boundary element method is applied in the calculation of more complex ground model in the soil with massive texture, and the calculation results are available for reference to actual grounding engineering project.

关 键 词：直接边界元法 间接边界元法 块状土壤 接地参数 剖分单元 

分 类 号：TM86[电气工程—高电压与绝缘技术] TM14