Filter decoupling anti-interference electric power secondary system

The utility model relates to an electric power system anti-interference technology, and in particular discloses a filter decoupling anti-interference electric power secondary system which comprises a secondary device used as a load. The secondary device is connected with the output end of a power supply conversion circuit. The input end of the power supply conversion circuit is connected with the output end of a primary device, so as to convert alternating current provided by the primary device to alternating current or direct current needed by the secondary device. The input end of the power supply conversion circuit is connected with a filter decoupling circuit, so as to suppress the differential mode interference from the primary device. The input end of the power supply conversion circuit provided by the utility model is connected with the filter decoupling circuit, so as to suppress the differential mode interference from the primary device, thus the accuracy of data transmission is improved.