Lightning accident warning method

The invention discloses a lightning accident warning method in the technical field of controlling a power system. The lightning accident warning method comprises the following steps of: firstly, reading measurement data of a lightning positioning system and network parameters of the power system, setting a lightning-stroke influence distance and a lightning-stroke safe distance, and calculating the influence scope of the current lightning stroke; then finding out a line set within the lightning-stroke influence scope according to the influence scope of the current lightning stroke, and calculating the shortest distance from a lightning stroke point to each line; if the shortest distance between the lightning stroke point and each line is less than the lightning-stroke safe distance, judging that the current line is not safe, or else the current line is safe; and finally, generating an expected accident set and lightning stroke warning information. According to the lightning accident warning method disclosed by the invention, a potential threat of the lightning to the power system can be judged more accurately, the expected accident set for reference of dispatching and operating staff is generated and the safety and the reliability of the power system can be improved.