Insulator pollution flashover pre-warning method and system based on leakage currents

The invention discloses an insulator pollution flashover pre-warning method and system based on leakage currents. An insulator pollution flashover pre-warning test system and the pollution flashover pre-warning method are provided based on deep study carried out on the acquiring of the leakage currents of supporting insulators, signal processing and extraction of characteristic quality. The test system comprises an LED optical fiber sensor, a signal preprocessing module, a data collecting module, a signal transmitting module, a power supply module and a data collecting and analyzing module. Through the utilization of the test system, pollution flashover measurement data are obtained, and finally a neural network model is obtained. The invention further provides the insulator pollution flashover pre-warning system based on the neural network model obtained through the scheme. Effective values, amplitude values, the number of pulses and relative humidity of the environment where the insulators located are regarded as input quantity of the neural network model to obtain the pollution grade of the insulators.