Abstract
Transmission lines are exposed to the atmospheric environment for a long time and are susceptible to faults caused by lightning, typhoons, heavy rainfall and other catastrophic weather. Heavy rainfall disasters are meteorological disasters that cause greater harm to the power grid in Henan Province, and the spatial and temporal distribution of their hazards is of great significance to heavy rainfall disaster defence. The statistical data of transmission line storm disaster faults in Henan Province in the past four years are used. The characteristics of the circulation environment field and the spatio-temporal distribution of grid failures under heavy rainfall are analysed, the main types of grid failures are summarised and the outages are graded. Based on the above statistical results, the main factors affecting heavy rainfall in Henan Province are studied and selected, and a storm warning model is established to predict the probability of transmission line failures under heavy rainfall weather conditions, providing an important basis for the prevention of power outages caused by heavy rainfall disasters.
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