Risk level assessment method for pollution flashover accident of insulator

A technology for pollution flashover and grade assessment, which is applied in the field of grade assessment and can solve the problem of lack of assessment methods for insulators to cause pollution flashover.

Active Publication Date: 2016-06-08
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
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Problems solved by technology

[0004] In general, most of the insulators in online operation currently lack an effective evaluation method for pollution flashover of insulators

Method used

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  • Risk level assessment method for pollution flashover accident of insulator
  • Risk level assessment method for pollution flashover accident of insulator
  • Risk level assessment method for pollution flashover accident of insulator

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Embodiment

[0074] Such as figure 1 As shown, the present invention mainly establishes a risk level assessment model for pollution flashover accidents of insulators by establishing a comprehensive assessment mathematical model of insulator surface pollution and a mathematical model of state parameters for the possibility of pollution flashover, and divides the corresponding risk level according to the assessment results. combine figure 2 A flow chart of the steps, a method for assessing the risk level of an insulator pollution flashover accident provided by the present invention, including

[0075] Step a, count the insulator type, service life and power-off cleaning date of the transmission line in the recent period of time, and establish the operating parameter database of the insulator;

[0076] Step b. Screening out various meteorological and environmental factors that play a major role in the accumulation of insulator pollution in the area where the transmission line is located;

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Abstract

The invention provides a risk level assessment method for the pollution flashover accident of an insulator. Based on the combination of existing environmental meteorological data and the operating parameters of an insulator at the target region of a target time node, a mathematical model for the pollution flashover accident risk of the insulator is established. Meanwhile, according to the assessment results of the above method, the flashover risk levels of insulators can be divided. Therefore, the line patrol and maintenance operation can be conducted in the targeted and selective manner. Power accidents caused by the pollution flashover accident of the insulator can be effectively prevented. As a result, the power system is ensured to run in the reliable, safe and economical state.

Description

technical field [0001] The invention relates to the technical field of high-voltage transmission line insulators, in particular to a risk level assessment method for insulator pollution flashover accidents. Background technique [0002] Due to long-term exposure to the atmospheric environment, insulators operating on transmission lines will gradually deposit a layer of dirt on their surfaces under the combined effects of various meteorological conditions, such as environmental quality, humidity, rainfall, wind and environmental conditions. When encountering high humidity weather, the soluble substances in the dirt layer dissolve in water to form a conductive water film, so that a leakage current flows along the surface of the insulator, and its size mainly depends on the degree of dirt and moisture. Affected by factors such as shape and structural size, the current density of each part of the insulator surface is different, and the part with a relatively high current density...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G06F17/30
CPCG01R31/12G06F16/90
Inventor 苏国磊王敩青孙晓瑜樊友平张建刚郑鑫张岱张福
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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