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A Lightning Risk Assessment Method for Overhead Distribution Lines Based on Electrical Geometric Model

An electrical geometric model, a technology of distribution lines, applied in data processing applications, instruments, design optimization/simulation, etc., can solve the problems of lack of accurate calculation, deviation of lightning protection management of distribution network lines, etc., to achieve convenient calculation, standard specifications Reasonable and accurate evaluation results

Active Publication Date: 2022-04-22
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The patents or methods disclosed above, including other disclosed lightning hazard risk assessment methods, are relatively lacking in the accurate calculation of lightning tripping rate and the application of actual lightning parameters, which will bring deviations to the lightning protection management work of distribution network lines

Method used

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  • A Lightning Risk Assessment Method for Overhead Distribution Lines Based on Electrical Geometric Model
  • A Lightning Risk Assessment Method for Overhead Distribution Lines Based on Electrical Geometric Model
  • A Lightning Risk Assessment Method for Overhead Distribution Lines Based on Electrical Geometric Model

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Embodiment Construction

[0047] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0048] The invention relates to the technical field of lightning protection for overhead lines in power system distribution networks, in particular to a method for assessing the risk of lightning damage of overhead power distribution lines based on an electrical geometric model. By establishing the space-time coordinates around the tower, based on the electrical geometric model, considering the influence of surrounding trees and buildings, and based on the actual lightning parameters, a space-time topology assessment method for distribution network lightning damage that comprehensively assesses the risk of direct lightning and induced lightning overvoltage is established. The risk level of towers in specific distribution network lines can accurately find out the towers with relatively high lightning risk...

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Abstract

A method for assessing the risk of lightning damage of overhead distribution lines based on an electrical geometric model, comprising the following steps: 1) judgment of lightning strike location; 2) calculation of lightning strike overvoltage; 3) calculation of lightning strike tripping rate; 1) Establish a location judgment model, further classify lightning strike fault types and calculate lightning strike overvoltage according to the lightning strike location, step 2) establish a lightning strike overvoltage calculation model, and determine whether lightning strike will cause line flashover, step 3) Establish considerations Calculation method of lightning strike tripping rate under multi-phase flashover precondition, step 4) establishing lightning damage risk level assessment method comprehensively considering direct lightning strike and induced lightning. This method establishes a systematic lightning risk assessment process for overhead distribution lines, which can provide a basic assessment basis for the lightning protection design, operation and maintenance of overhead distribution lines.

Description

technical field [0001] The invention relates to the technical field of lightning protection for overhead power distribution lines in electric power systems, in particular to a lightning risk assessment method for overhead power distribution lines based on an electrical geometric model. Background technique [0002] Compared with traditional high-voltage transmission line lightning protection, distribution network line lightning protection has significant differences and technical characteristics. High-voltage transmission lines (voltage level above 110kV) are generally iron tower structures. Lightning protection lines are erected on the lines, and special grounding grids are laid under the foundation of the iron towers to connect with the iron towers. counterattack lightning), the lightning strike part is generally the lightning protection line or the top of the tower, and the distribution network line is only required to be erected with lightning protection lines 1-2 kilome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q10/06393G06Q50/06G06F30/20Y04S10/50
Inventor 卢泽军谷山强赵淳吴军万帅吴敏王佩
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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