摘要
为了分析土壤的结构从而进一步分析变电站接地网的性能,使用复镜像法逼近多层土壤中的格林函数,提出了一种采样的自适应选取方法。该方法使采样步长和采样点数根据土壤的层数和各层土壤的厚度自动调整,有利于计算机编程。在逼近过程中,使用了Prony法。比较了逼近后获得的函数与原函数,逼近效果非常好。使用该方法,由一组土壤视电阻率值反演得到了一个6层土壤结构。
In order to analyze the soil structure and to use the result to analyze the performance of grounding grids in substation, this paper presents a self adaptation sampling scheme when complex image method is used to approach Green's function in multi-layer soil. The method can decide the sampling interval and the number of sampling points according to the number of the soil's layers and the thickness of each layer. Thus, it is propitious to develop computer programs. Prony's method is used in the process of approach. The new function is compared with the previous one and the result is very good. Based on the presented method, the paper deduces a six-layer soil model form a group of apparent resistivities.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2002年第4期1-4,共4页
Journal of North China Electric Power University：Natural Science Edition
基金
国家自然科学基金项目(50077006)
教育部高等学校优秀青年教师奖励基金计划和骨干教师资助计划共同资助
关键词
复镜像法
自适应采样方法
电力系统
接地网
计算机
multi-layer soil
Green's function
complex image method
Prony's method
self adaptation method
