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A fitting design method and fittings for improving insulator pollution flashover voltage

A technology of pollution flashover voltage and design method, which is applied to insulators, circuits, electrical components, etc., can solve the problems of insulator pollution flashover and increased cost, and achieve the effect of prolonging the service life, low processing cost, and improving the pollution flashover voltage.

Active Publication Date: 2017-12-12
国网江西省电力有限公司南昌供电分公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Better solve the pollution flashover problem of insulators in polluted areas without causing a substantial increase in cost

Method used

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  • A fitting design method and fittings for improving insulator pollution flashover voltage
  • A fitting design method and fittings for improving insulator pollution flashover voltage
  • A fitting design method and fittings for improving insulator pollution flashover voltage

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Effect test

Embodiment 1

[0028] The invention provides a method for designing fittings to increase the pollution flashover voltage of insulators. The basic principle is to calculate the tangential field strength on the surface of the insulator after adding fittings through electric field simulation, and obtain the optimal fitting shape parameters and fitting installation through fitting design criteria. Location. The steps are:

[0029] 1. Establish an electric field simulation model for an insulator with known model parameters.

[0030] The simulation software can choose software based on finite element method, and establish a full-scale model according to the 1:1 ratio. When the simulation model is established, under the premise of ensuring the accuracy, relevant values ​​are taken for the boundary and material characteristic parameters. The boundary is set manually, and the distance between the boundary and the insulator is stipulated to be much larger than the size of the insulator itself.

[0...

Embodiment 2

[0058] The invention provides a fitting that can increase the pollution flashover voltage of an insulator, which consists of a metal ring piece 2 bonded 3 to an iron cap 4 through an adhesive, the iron cap 4 is installed on the top of the insulator shed 1, and the metal ring piece 2 is installed On the iron cap 4, its installation position and structural parameters are all processed by the design parameters. The fittings can effectively reduce the tangential electric field on the upper surface of the insulator shed 1 and increase the pollution flashover voltage of the insulator. The metal ring piece 2 is a metal material with good anti-corrosion ability or a metal treated with anti-corrosion technology. The specific composition of goldware is as follows:

[0059] 1. The metal ring piece 2 is installed on the iron cap 4, and its installation position and structural parameters are determined by the design parameters. That is to say, the optimal installation position and struct...

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Abstract

The invention provides a design method for a fitting capable of improving a pollution flashover voltage of an insulator, and the fitting. The design method comprises the steps of establishing an electric field simulation model for the insulator with known model and parameters; establishing an insulator electric field simulation model after the fitting is added; determining a range of the shape, the mounting position and other parameters of the fitting capable of improving the pollution flashover voltage of the insulator; solving functional relationships between the strength of the electric field along the surface of the insulator, and the shape parameters, the mounting position and other parameters of the fitting; and solving the optimal fitting shape parameter and the fitting mounting position according to the design criteria of the fitting. The fitting is formed by a metal ring sheet which is glued on an iron cap through a binder; the iron cap is mounted at the top end of the insulator; the metal ring sheet is mounted on the iron cap; and the mounting position and the structural parameters are determined by the design parameters. According to the design method, reasonable and accurate fitting structural design is carried out specific to the parameters of the insulator, so that the optimization of the electric field structure on the surface of the insulator is realized; an effect of improving the pollution flashover voltage is achieved; and the pollution flashover probability is dramatically reduced.

Description

technical field [0001] The invention relates to insulators for transmission and transformation lines, in particular to a design method for fittings and novel fittings for increasing the pollution flashover voltage of insulators. Background technique [0002] Under adverse weather conditions such as fog, dew, and drizzle, dirty insulators will flashover at lower voltages. Once an insulator trips due to pollution flashover, it indicates that a large number of individual insulators in the same polluted area are at the risk of critical pollution flashover tripping. The causes of pollution flashover accidents are not only related to the type of pollution, the degree of pollution and atmospheric conditions, but also related to the potential distribution on the insulator string and the partial discharge of the insulator string. The traditional solutions include increasing the creep distance, regular cleaning and RTV spraying. [0003] However, these methods have various problems....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/42H01B17/38
CPCH01B17/38H01B17/42
Inventor 蔡礼王洛谭学峰邹志坚胡裕峰曾庆汇揭伟朱玉莲汪洁刘悠欧阳敏祝志炉刘少华万俊俊黄承志钟丽梅王宇宁唐庆国周煜汪涓华王凯睿欧阳瑾曹建军林桂平廖文刘凯杰张祥罗王强锋姜力强王云谢金泉
Owner 国网江西省电力有限公司南昌供电分公司
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