Calculating Mutual Impedance between Power-Line and Communication-Line with Earth Return Current

대지귀로 전류에 의한 전력선과 통신선의 상호임피던스 해석

A method for calculation of mutual inductance from the parallel power-line and earth conduct to communication-line is studied in the paper. The solution for the electromagnetic field produced by an overhead power-line is derived using Maxwell's equations and treating the as a boundary value problem. Total mutual inductance from direct current and image current to communication-line is used Carson's formula for infinitely long parallel conductors.