Lightning disaster risk assessment method for power grid based on fine grid
A lightning disaster, fine grid technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that the lightning hazard assessment method of the power grid cannot meet the fineness and spatial expression, and reach the scope of application Wide range of effects with high evaluation accuracy
Inactive Publication Date: 2016-11-30
HANGZHOU CHENQING HEYE TECH
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[0003] The purpose of the present invention is to solve the problem that the existing power grid lightning disaster risk assessment method can no longer meet the requirements for the fineness of the assessment and the spatial expression mode, and provides a fine grid-based lightning disaster risk assessment method for the power grid, which is analyzed in the following The vulnerability of the power grid to lightning disasters under the fine land grid is the basic evaluation unit. Based on GIS technology, a fine spatial quantification GIS model of power grid vulnerability in lightning disasters is established. Hazard risk assessment model, and test the data obtained in this process, including significance test and correlation analysis
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[0014] The present invention will be further described below in conjunction with the accompanying drawings.
[0015] The fine grid-based lightning disaster risk assessment method for the power grid analyzes the vulnerability of the power grid to lightning disasters under the fine-grained land grid as the basic evaluation unit, including the following steps: 1) According to the land type, analyze and determine the lightning density between it and the ground 2) Determine the correlation coefficient between the climate background and lightning density, and conduct a significant test; 3) Use the gray correlation method to determine the weight of the lightning disaster risk index; 4) The lightning disaster risk The weight of the index is quantified; 5) The fine land grid is used as the basic evaluation unit to establish a lightning disaster risk assessment model for the power grid; among them, the land type includes residential land, urban land, water area, dry land, forest land, gr...
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The invention discloses a power grid lightning disaster risk assessment method based on fine grids, which analyzes the vulnerability of the power grid to lightning disasters under the condition that the fine grid of the land is used as the basic evaluation unit. 2) Determine the correlation coefficient between climatic background and ground-to-ground lightning density, and carry out significance test; 3) Determine the weight of lightning disaster risk indicators by using the grey correlation method; 4) Determine the lightning disaster risk The weights of the indicators are quantified; 5) Using the fine land grid as the basic evaluation unit, establish a lightning disaster risk assessment model for the power grid. The invention establishes a fine spatial quantification GIS model of power grid vulnerability in lightning disasters, and proposes a power grid lightning damage risk assessment model. The fine spatial grid is used as the basic evaluation unit to conduct spatial quantitative research on the vulnerability of power grids in lightning disasters. Wide application range and high accuracy.
Description
technical field [0001] The invention relates to the field of disaster risk assessment, in particular to a fine grid-based lightning disaster risk assessment method for a power grid. Background technique [0002] At present, the assessment method of lightning hazard risk in the power grid is mainly based on the lightning tripping rate as the evaluation index, and a perfect evaluation system has not yet been established. Traditional methods and technologies cannot meet the needs. For example, the Chinese patent literature discloses an invention patent named "Lightning Flashover Risk Assessment Method for Regional Transmission Lines", the authorized announcement number is CN 102156787 B, and the authorized announcement date is December 12, 2012. Yes, including database, shielding risk assessment model, counterattack risk assessment model and risk value synthesis module. The database is used to provide various parameters and parameter values. The shielding risk assessment model...
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IPC IPC(8): G06F19/00
Inventor 张斌张耀东文仁强何长虹史立栋李昌辉
Owner HANGZHOU CHENQING HEYE TECH