外界电磁场在地下多导体系统中感应电流和电位分布的计算方法

本文对外界电磁场源沿地下无限长平行多导体系统感应的电流及电位分布进行了分析;利用镜象法从电磁场基本方程出发,推导出了这些受扰地下导体中感应电流及电位分布的一般表达式;首次提出了地下多导体中感应电流、电位所应满足的传输线方程组。本文中的结论具有普遍意义,对于导体位于大地表面的情况及直流激励的情况等都同样有效。文中对平行双导体在传导性点电极激励下产生的电流、电位分布绐出了计算结果,并与实验结果进行了比较。

An Approach to the Calculation of Currents and Potetials along Underground Multi-conductors Induced by External Electromagnetic Fields

In the paper,a new approach,which can be applied to calculate the distribution of currents and potentials along parallel underound multi-conductors induced by any external LF electromagnetic fields,is first presented.Fundamental formulae for these currents and potentials are derived by image theory.The transmission line models and equations are introduced and discussed in the paper.All the conclusions can be applied to multi conductors both in underground as well as on the earth surface. Examples for two parallel conductors are given,and compared with the exper im ental results.