Electric power facility flood disaster risk assessment method considering reservoir influence

Abstract

The invention provides an electric power facility flood disaster risk assessment method considering reservoir influence, and the method comprises the following steps: obtaining the rainfall intensityand rainfall space distribution condition of a mountain torrent ditch basin according to the rainfall data of the basin where an electric power facility is located, and employing a Gunn Bell extreme value method for calculation to obtain the rainfall frequency; calculating the flood flow according to the rainfall intensity of the basin where the electric power facilities are located and the collected reservoir information; substituting the flood flow data as an important input field into a rainstorm flood inundation model together with terrain and land utilization data for flood inundation evolution process simulation to obtain inundation water depth and area space distribution conditions of a drainage basin where the power facilities are located; and according to the flood inundation water depth and the flood inundation range of the disaster area or actually measured hydrological data, carrying out simulation precision analysis on the inundation water depth and area by utilizing the disaster situation matching rate. By considering the flood influence of the reservoir on the downstream drainage basin, rainstorm flood disaster risk assessment is further carried out more comprehensively.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation of electric facilities, in particular to a flood disaster risk assessment method for electric facilities considering the influence of reservoirs. Background technique [0002] Flood disaster is one of the frequent meteorological disasters in Hubei Province, which has caused great economic losses to various industries. Statistics from the power industry show that in the summer of 2016 alone, the foundations of 769 transmission towers in Hubei’s transmission network were flooded and 375 towers suffered slope protection collapse or foundation settlement; a total of 154 substations in the province were damaged, and 31 substations were different. 15 substations were severely affected by flooding; 590 10 kV lines were out of service in 8 cities in the distribution network of the province, and 26,699 stations and 1.853 million users were out of power. How to avoid high-risk areas of flo...

AI Technical Summary

Problems solved by technology

The current estimation and assessment of the impact of flood disasters on power facilities mainly consider basic conditions such as terrain, natural river network, and precipitation. The impact of reservoirs in rivers on floods is less considered, and factors such as reservoir breaches and dam breaks cannot be eliminated. The impact of flooding and inundation on the power facilities in the downstream watershed

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