Device and method for predicting cable insulation failure rate in power distribution network

The invention provides a device and a method for predicting a cable insulation failure rate in a power distribution network. The device comprises a signal acquisition unit, an A/D converter, a central processing unit, a conversion circuit, an industrial computer and a wireless communication module, wherein the input end of a voltage sensor and the input end of a first current sensor are connected with a conducting ground cable; the input end of a second current sensor is connected with a connector of an insulator chain of an overhead power transmission conducting wire; the input end of a third current sensor is connected with a grounded cable; output ends of the voltage sensor, the first current sensor, the second current sensor and the third current sensor are connected with four different input ends of the A/D converter; the output end of the A/D converter is connected with the input end of the central processing unit; the output end of the central processing unit is respectively connected with input ends of the conversion circuit and the wireless communication module; the output end of the conversion circuit is connected with the input end of the industrial computer. According to the invention, errors caused during model building and parameter selecting are avoided, and the device and the method for predicting the cable insulation failure rate in the power distribution network have the characteristics of simplicity in input extraction, high accuracy and high prediction efficiency.