Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for assessing lightning flashover risks of regional power grid lines

A lightning flashover and risk assessment technology, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems that cannot truly reflect the risk level of lightning strike disasters, and achieve the effect of comprehensive and detailed assessment results

Active Publication Date: 2013-01-02
GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU +1
View PDF4 Cites 60 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lightning trip rate is a characteristic parameter that effectively reflects the source of the lightning risk of the power grid. However, since the lightning trip may not cause serious consequences such as interruption of power supply and other permanent failures of the power system, the absolute value of the lightning trip rate cannot truly reflect the lightning disaster of each line. Risk level, the lightning flashover risk assessment of the transmission network should consider the comprehensive assessment of a series of losses caused by the operation of the power grid and power transmission and transformation equipment after the line is tripped by lightning, in order to obtain a more comprehensive and detailed assessment result

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for assessing lightning flashover risks of regional power grid lines
  • Method for assessing lightning flashover risks of regional power grid lines
  • Method for assessing lightning flashover risks of regional power grid lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] The embodiment of the lightning flashover risk assessment method for regional power grid lines of the present invention includes the following steps:

[0055]S1 input line information and lightning situation in this area

[0056] Given the transmission line information that needs to be assessed for lightning risk, including the tower models and altitudes at all levels of the line, the type and number of insulators, the terrain characteristics of the line, and the grounding resistance of the tower;

[0057] The lightning situation in this area is given, that is, the lightning parameters such as the time, location, and lightning current amplitude of each lightning strike;

[0058] The data source of the lightning parameter statistics is the lightning positioning system. At present, the lightning positioning system is very complete and can provide more accurate lightning parameters;

[0059] S2 calculates the lightning strike tripping rate of the towers at all levels of t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for assessing the lightning flashover risks of regional power grid lines, which comprises the following steps that: through calculating the lightning-resistant level of each base rod tower and combining with a probability distribution function of lightning current amplitudes of a region, the lightning trip-out rate of each rod tower is obtained, and the average lightning trip-out rate of a line is calculated; then, through combining with an automatic reclosing failure rate and a failure rate of manual forced energization, a permanent failure rate of the line is obtained; and through considering the weight coefficient of the line in a power grid structure, the permanent failure load loss coefficient of the line at the specific time of a power grid and in an specific operation mode of the power grid, and the risk occurrence probability of other influencing factors, a lightning flashover risk assessment model of a regional power transmission grid is established. According to the invention, the shortcoming that the absolute numerical value of the lightning trip-out rate can not really reflect the lightning disaster risk level of each line is overcome, and the lightning flashover risk level of each rod tower of lines is assessed through comprehensively considering the differences among the lightning motions, topographical features, line structures, insulation configuration, lightning protection measures and the like of each line corridor in the power grid, so that more comprehensive and thorough assessment results are obtained.

Description

technical field [0001] The invention relates to a lightning flashover risk assessment method for transmission lines of regional power grids based on lightning location data. Background technique [0002] At present, there are few studies on lightning flashover risk assessment of power grid transmission lines. Generally, the lightning trip rate is used as the evaluation index, and the line with a high trip rate is considered to be a line with a high risk of lightning flashover. According to the power grid operation experience, although the number of line trips caused by lightning strikes is large, the proportion of unplanned outages is lower than that of trips due to the high reclosing success rate of automatic reclosing devices. The main reason is that the lightning trip is an instantaneous fault of the power system. After the insulation of the fault point is restored, the automatic reclosing is generally successful, and the possibility of the lightning trip turning into a p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 陈锡阳张弦王伟然禤培正陈浩平许彬刘刚
Owner GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products