Calculating Capacitance by the Mirror Image Method

For quantitative analysis of impact of grounding capacitance on the traction power supply system, in this paper, two wires system as an example with the mirror image method concluded the calculation formula of two wires system to ground capacitance and partial capacitance. At last, the influence of grounding capacitance on the traction power supply system is given quantitatively to provide the more accurate basis for engineering calculation.