基于层状介质模型的大地导电率计算及应用  

Calculation and Application of Earth Conductivity Based on Layered Medium Models

作　　者：余涛 王俊超 张楚楚 Yu Tao;Wang Junchao;Zhang Chuchu(China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.)

机构地区：[1]中国能源建设集团江苏省电力设计院有限公司,南京市211102

出　　处：《勘察科学技术》2024年第S1期135-139,共5页Site Investigation Science and Technology

摘　　要：大地导电率是高压输电线路电气设计中,计算电磁干扰影响的重要参数。目前由四极电测深法测得的电阻率数据,一般通过拉德列曲线法或简化曲线法求解大地导电率值。这两种曲线都是经验曲线并且只考虑了大地呈两层结构的情况,实际应用中有一定的计算误差。该文基于交流电磁场波阻抗递推计算原理,提出了层状介质模型大地导电率的理论计算方法,可方便地计算任意多层模型的大地导电率值,消除了常规大地导电率求解方法中的误差,提高了大地导电率计算结果的精度和可靠性。Earth conductivity is an important parameter for calculating the influence of electromagnetic interference in the electrical design of high-voltage transmission lines.At present,the resistivity data measured by the quadrupole electrical sounding method generally solves the earth conductivity value through the Radley curve method or the simplified curve method.There are some calculation errors in practical applications because the two curves are empirical curves and only consider the situation of two-layer structure of the earth.In this paper,we put forward a theoretical method for calculating the earth conductivity of layered medium models based on the principle of recursive calculation of AC electromagnetic field wave impedance.It is easy to calculate the earth conductivity of any multi-layer model,meanwhile,the theoretical method can eliminate the error of conventional method and improve accuracy and reliability of the earth conductivity calculation.

关 键 词：层状介质 交流电磁场 波阻抗 大地导电率 

分 类 号：TM75[电气工程—电力系统及自动化]