Electric network thunderstorm damage distribution determination method

Abstract

The invention relates to a grid thunder-threat distribution confirming method. The confirming method adopts a computer to process thunder automatic monitoring data and establish a databank, and adopts a grid method to carry out statistical analysis to the thunder parameter while taking a geographic information system and the databank as an analysis platform, and then adopts the computer to carry out the statistical analysis to the thunder data according to typical criterion so as to obtain the thunder-threat distribution of corresponding objects. The method has the following basic steps: firstly, the thunder automatic monitoring data is stored in the databank by the computer; then grid distribution is carried out to selected zones on a digital map; the data of each grid is analyzed statistically to obtain the statistical thunder parameter; and then the current-amplitude value of threatening thunders which can cause the flashover of insulator strings of power transmission lines is adopted as judging evidence according to a grid insulation structure to make the statistical analysis to the attribute of the thunder current-amplitude value and eliminate the useless data; special attribute data of happened flashover accidents caused lightning-strike on the power transmission lines is stored in the computer; finally, the computer is used for figuring out corresponding geographic distribution layers so as to obtain the grid electronic thunder-threat distribution chart. The method has the advantages that the method is easy and intelligible with better operability and practicability.

Description

technical field [0001] The invention belongs to the field of lightning protection engineering technology, and in particular relates to a method for determining the distribution of lightning damage, in particular to a method for determining the distribution of lightning damage in a power grid. Background technique [0002] Power grid lightning damage distribution is a statistical technique that indicates the probability of lightning flashover hazards on high-voltage transmission lines, and is the basis for lightning protection design and protective measures for transmission lines. For a long time, the engineering community can only divide the lightning activity area based on the lightning day data that only describe the law of lightning activity and have long-term records. Days are defined as multiple minefields, and those with an average lightning day of more than 90 days are defined as strong minefields. As far as the applicant knows, the biggest shortcoming of this simple...

AI Technical Summary

Problems solved by technology

So far, there is no effective and automatic statistical technique that can make statistics on the distribution of lightning damage in large areas, large samples, and multiple insulated power grids. This situation needs to be changed urgently.

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