Association mining method for micro-topography and lightning damage characteristic parameters of power transmission corridor area

Abstract

The invention provides a correlation mining method for micro-topography and lightning damage characteristic parameters of a power transmission corridor area. The method comprises the following steps: acquiring tower information of a power transmission line, lightning activity parameters of a region where the power transmission line is located and regional elevation data, and acquiring a tower ground lightning density value and a lightning current amplitude mean value by adopting a new lightning activity parameter statistical method in consideration of the requirement of microtopography analysis on regional subdivision; analyzing and extracting various microtopography feature parameters through geographic information software, and reflecting the features of the microtopography comprehensively and accurately; preprocessing the parameters by adopting different data generalization methods, and constructing a to-be-mined transaction table; and carrying out the correlation analysis based on an association rule algorithm to obtain micro-topographic features having strong correlation with thunder and lightning activities. The method is suitable for analyzing the relevance between the complex microtopography of the power transmission line and the thunder and lightning activities, and has important significance for defining key lines, key towers and power transmission line construction for lightning protection and lightning protection measure transformation work.

Description

technical field [0001] The present application relates to the technical field of designing transmission line lightning damage protection, and in particular relates to a correlation mining method of micro-topography and lightning damage characteristic parameters in a power transmission corridor area. Background technique [0002] Transmission lines are the basic components of the power grid, and their safety, reliability and stability play a vital role in ensuring the stable operation of the power system. The terrain that the transmission corridor passes is quite complex, and the landform is extremely diverse. Most of the overhead transmission lines with a voltage level of 110kV and above have withstood the severe test of the thunderstorm season, and lightning strikes frequently occur. Lightning strike faults of transmission lines account for a high proportion of the failure rate of the entire power system, and the faults caused by lightning are the most serious, seriously th...

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Problems solved by technology

[0003] The current analysis of lightning activities on transmission lines only stays in the use of grid method to count the lightning density and lightning activity intensity along the line. Comprehensively reflect the impact of the micro-topography of the line erection area on the lightning strike fault of the line, and it is impossible to carry out protection design for the characteristics of lightning damage in specific scenarios, resulting in the inability to take into account the effectiveness and economy of lightning protection measures for transmission lines

Moreover, lightning activities are characterized by strong dispersion and strong randomness, with many influencing factors and no dominant factor. It is difficult to obtain correct and effective research results by using traditional statistical methods to quantitatively describe lightning activities through calculation methods.

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