Method and system for preventing power electric signal interference

The invention provides a method and a system for preventing power electric signal interference. The method comprises the following steps: determining an opposite area S between a power cable and a centralized control signal cable on a fully mechanized coal mining face of a coal mine; determining an induced voltage Uc generated when the power cable interferes with the centralized control signal cable; calculating induced capacitance Csc according to the induced voltage Uc; determining an installation distance d according to the induced capacitance Csc and an opposite area S between the power cable and the centralized control signal cable; calculating the capacitance of the compensation capacitor according to the installation distance d and the facing area S; a compensation capacitor is selected according to the capacitance, the compensation capacitor is installed at the input end of a master controller power supply module of the centralized control system in parallel, and the centralized control signal cable i