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Composite insulator surface electric field calculating method

A technology of composite insulators and calculation methods, which is applied in the high voltage field and can solve the problems of composite insulators such as water repellency

Inactive Publication Date: 2016-09-07
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is, in order to solve the existing problem of composite insulator hydrophobicity, the present invention proposes a kind of composite insulator surface electric field calculation method

Method used

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  • Composite insulator surface electric field calculating method
  • Composite insulator surface electric field calculating method

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Experimental program
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Embodiment Construction

[0025] Such as figure 1 As shown, the specific implementation of the calculation of the surface electric field of the composite insulator is as follows:

[0026] (1) Spray water on the composite insulator sample, and use photographic equipment to take pictures of the surface of the composite insulator covered with water droplets.

[0027] (2) Determine the hydrophobicity level of composite insulators, such as Figure 4 As shown, the hydrophobicity grade of composite insulators is divided into seven grades, from HC1 to HC7.

[0028] (3) A piece of the composite insulator silicone rubber shed The area S and the residual resistance R are equivalent to the circuit, as shown in Figure 2. Figure 2 (1) is a wet composite insulator, and Figure 2 (2) is an equivalent model of a wet composite insulator.

[0029] (4) Apply image processing technology to binarize the hydrophobic image. In the size image, the unit with a pixel of 1 is the dry unit of the insulator, which contains sil...

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Abstract

The invention discloses a composite insulator surface electric field calculating method. A droplet-covered insulator surface image is obtained through a photograph device, circuit equivalent is performed on one M*N area S and residual resistance R of a composite insulator silicone rubber umbrella skirt, binarization is performed on a hydrophobic image by use of an image processing technology, in an M*N-sized image, a unit with a pixel of 1 is an insulator drying unit, a unit with a pixel of 0 is an insulator humid unit, an admittance matrix with a size of (M*N)<2> is formed by applying unit resistance and capacitance parallel equivalence to each pixel unit, and electrical network analysis can be performed on the M*N area S by use of a node voltage method. The method for constructing a surface electric field model is relatively simple, accords with an actual droplet distribution condition, and has great guidance significance on anti-pollution flashover work of a composite insulator.

Description

technical field [0001] The invention relates to a method for calculating the surface electric field of a composite insulator, which belongs to the technical field of high voltage. Background technique [0002] Since the 1990s, the acceleration of industrialization has led to increasingly serious air pollution in my country. In the Northeast, Northwest, North China, Central China, East China, and South China, there have been large-scale regional pollution flashover accidents. The main reasons are glass, porcelain, etc. Due to the poor pollution resistance of the insulating material itself, even taking corresponding anti-pollution measures such as regular cleaning, anti-pollution shed design, increasing creepage distance, etc., cannot effectively prevent the occurrence of insulator pollution flashover accidents. Different from traditional glass and porcelain insulators, the silicone rubber material of composite insulators has good hydrophobicity and hydrophobic migration charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/10004G06T2207/30164
Inventor 安义徐文杨强
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO