Online monitoring method for high-voltage equipment of high-speed train

The invention discloses a high-speed train high-voltage equipment on-line monitoring method, and the method comprises an on-line insulation monitoring module and an on-line state monitoring module. The on-line insulation monitoring module mainly aims at lightning arrester and mutual inductor products in a high-voltage box, and measures the parameters such as leakage current representing insulation performance, voltage and current of primary and secondary windings of the mutual inductor and the like; the on-line state monitoring module is used for monitoring the on-off state of a high-voltage switching device in the box, the network voltage parameter of a contact network and the temperature value of each point of equipment in the box. Through the parameters, the working state of the high-voltage electric appliance in the high-voltage box can be effectively evaluated, and early warning information is set, so the driving safety problem caused by major equipment faults can be effectively prevented; meanwhile, a t