Capacitance Calculation of Overhead Transmission Line Based on Moment Method

In this paper, the capacitance parameter of the overhead transmission lines is calculated by the moment method (MoM), which is based on the image method of electromagnetic theory. The effectiveness of the proposed method is verified by an overhead transmission line model, which has analytical solution. The comparison results show that the relative error between the MoM and analytical solution is small, which shows the accuracy of the program based on the MoM. Then the proposed MoM is applied to calculate the distributed capacitance parameters of three typical overhead transmission lines.