On-line evaluation method of transmission line fault probability with consideration of rainstorm disaster influence

Abstract

The invention belonging to the technical field of power system automation discloses an on-line evaluation method of transmission line fault probability with consideration of a rainstorm disaster influence. A predicted rainfall capacity of a geographical grid of an area where an evaluated target grid is located during a period of time from a current time to a future evaluation time and a historical accumulated rainfall capacity within a certain historical period of time before the current time are calculated; according to rainfall information of the geography grid, a tower and latitude and longitude information of a weather station predicted and historical rainfall capacity information of a transmission tower is calculated; on the basis of terrain and geomorphic parameters of the foundation of the tower, a comprehensive effective rainfall capacity of the transmission tower is calculated by combining the rainfall capacity information of the tower so as to obtain a fault probability of the tower; and then with an independent event algorithm, a transmission line fault probability with consideration of a rainstorm disaster influence is obtained.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular the invention relates to an online evaluation method of transmission line failure probability taking into account the impact of rainstorm disasters. Background technique [0002] Heavy rain is one of the common meteorological disasters in China. Heavy rainfall over a large area for a long time will directly lead to flood disasters. Sustained heavy rainfall or short-duration torrential rain with previous rainfall accumulation. Rainwater accumulation and seepage will lead to increased rock and soil weight on slopes, softened rock and soil, and reduced rock and soil strength in sliding zones, which will lead to serious derivative disasters such as landslides and debris flows. . [0003] With the high demand for electricity consumption caused by the rapid economic growth in recent years, the power industry has developed rapidly, and the main grid structure ...

AI Technical Summary

Problems solved by technology

The method aims to calculate the rainfall information of the geographical grid in the area where the power grid is located based on the historical rainfall information of the weather station and the weather forecast information, and overcome the fact that the future rainfall trend cannot be truly reflected when only referring to the historical rainfall data of the weather station, and the meteorological The defect of not being able to obtain enough meteorological measuring point information when there are few stations; calculate the rainfall information of the transmission tower according to the geographic grid rainfall information, the tower and the longitude and latitude information of the weather station, and solve the problem of searching for the nearest point to the tower according to the effective distance The problem of low efficiency in the way of weather station information; by prioritizing the selection of topographic and geomorphic parameters of the base section of transmission towers and towers, the purpose of key maintenance of key towers and key area parameters has been achieved, and the data maintenance of tower parameters has been solved on the premise of ensuring parameter accuracy workload problem

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