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Method for evaluating pollution flashover risk of insulator of power transmission line

A transmission line and risk assessment technology, applied in the field of transmission line insulator pollution flashover risk assessment and insulator pollution flashover risk assessment, to achieve the effect of saving labor costs, saving equipment costs, and reducing the frequency and frequency of monitoring

Inactive Publication Date: 2017-04-19
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0007] From the above three points, it can be found that there are few studies on pollution flashover risk assessment of transmission line insulators. Therefore, it is necessary to provide a pollution flashover risk assessment method based on the routine detection of insulator contamination from the perspective of transmission line insulator operation and maintenance.

Method used

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  • Method for evaluating pollution flashover risk of insulator of power transmission line
  • Method for evaluating pollution flashover risk of insulator of power transmission line
  • Method for evaluating pollution flashover risk of insulator of power transmission line

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Embodiment

[0066] Embodiment: first: collect historical data (off-line detection data or on-line monitoring data), comprise the salt density data of transmission line insulator, test moment insulator location meteorological data (monthly average rainfall, annual extraordinarily heavy rain times, acid rain ph, air quality level ) and voltage (kV), insulator model, etc., these data are used as sample data to train the BP neural network.

[0067] Secondly: use the trained BP neural network, input the current meteorological data (monthly average rainfall, annual torrential rain times, acid rain ph, air quality level) and voltage (kV), insulator model, etc. obtained from the meteorological early warning system, and calculate Get the current salt density value of the insulator.

[0068] Then: combine the salt density and meteorological data (temperature, humidity) where the tower is located, and according to the calculation model of the pollution flashover voltage, obtain the 50% pollution fla...

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Abstract

The invention discloses a method for evaluating a pollution flashover risk of an insulator of a power transmission line. The method comprises the following steps of (1) obtaining meteorological data through a meteorological early-warning system and calculating a salt density value of the insulator of the power transmission line by adopting a BP neural network algorithm; (2) calculating 50% of pollution flashover voltage of the insulator under the salt density according to the calculated salt density vale and the meteorological data of a tower location; and (3) dividing the power transmission line into Num intervals, carrying out pollution flashover risk evaluation of the insulator of the power transmission line on each interval and finally calculating the pollution flashover risk of the insulator of whole power transmission line. Compared with the prior art, the method has the advantages that pollution flashover risk evaluation of the power transmission line is carried out by providing given meteorological conditions on the basis of meteorological and salt density monitoring data of historical records, so that real-time online contamination monitoring is not needed, a lot of online contamination monitoring devices do not need to be arranged on the power transmission line and the equipment cost can be reduced.

Description

technical field [0001] The invention relates to an insulator pollution flashover risk assessment method, in particular to a transmission line insulator pollution flashover risk assessment method, which belongs to the technical field of high-voltage transmission line online state assessment. Background technique [0002] Transmission line insulator pollution flashover accidents have seriously affected the safe and stable operation of the power grid, and brought economic losses to power users and power companies. According to the real-time parameter information of insulators obtained by online monitoring, accurate and effective assessment of pollution flashover risk of transmission line insulators is an effective measure to prevent insulator pollution flashover accidents and improve power system reliability. [0003] At present, the research and application of pollution flashover risk assessment of transmission line insulators mainly focus on the following aspects: [0004] (...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G06N3/08
CPCG06Q50/06G06N3/084G06Q10/0635
Inventor 张焕青张慕婕杜勇董晓虎龙飞胡川宫泽罗毅
Owner STATE GRID CORP OF CHINA
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