Composite insulator flashover early warning method based on leakage current and EFS

The invention discloses a state evaluation and flashover early warning method for high-voltage power transmission and transformation insulation equipment, provides a new parameter for state evaluation of a composite insulator based on leakage current, and can be used for early warning of the composite insulator which may generate flashover. In order to save the cost of operation and maintenance of a power system network, maximize the service life of the composite insulator and further understand the degradation state of the insulation strength of the insulator, analysis of electric field force (EFS) is also introduced. EFS analysis calculation is carried out on the early warning insulator through COMSOL software, and the maximum electric field mode of the early warning insulator in a clean environment and the maximum electric field mode of the early warning insulator in a simulated working condition environment can be obtained. After the two numerical values are subjected to weighted comparison, the specific