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1,200kV extra-high voltage suspension type composite rod insulator

A composite insulator, UHV rod technology, applied in the direction of suspension/strain insulators, insulators, electrical components, etc., can solve the problems of too many connection nodes, electromechanical stress failure, uneven electric field distribution, etc. The effect of good hydrophobicity and migration, high pollution flashover voltage and light weight

Inactive Publication Date: 2014-04-02
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing insulators have problems such as extremely uneven electric field distribution and too many connection nodes of porcelain glass insulators, which cannot adapt to extreme operating environments such as high humidity and high temperature of UHV transmission lines, and will cause various problems due to changes in environmental and electrical load conditions. Electromechanical stress failure, compromising the useful and operational life of the entire line

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  • 1,200kV extra-high voltage suspension type composite rod insulator

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Embodiment Construction

[0013] Such as figure 1 As shown, the present invention is composed of two insulators connected in series by connecting fittings 1, and the connecting fittings 1 are respectively arranged at both ends of each insulator, and the highest voltage level of the insulators is 1200kV. Each insulator includes a mandrel 2, a sheath 5 and an umbrella skirt 4 sleeved on the mandrel 2, and the two ends of the mandrel 2 are provided with a voltage equalizing ring 3, which can improve the problem of extremely uneven electric field distribution of the entire insulator. The adverse effect caused by too many connection nodes of the porcelain glass insulator is avoided. The mandrel 2 is located on the wire side. The equalizing ring 6 adopts a double-layer equalizing ring. The diameter of the upper layer of the double-layer equalizing ring is 900mm, and the diameter of the lower layer is 350mm. It can equalize step by step and effectively improve the electric field distribution. The shed 4 ...

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Abstract

The invention discloses a 1,200kV extra-high voltage suspension type composite rod insulator, which consists of two insulators, wherein the two insulators are connected in series through connecting fittings, and the highest voltage of each insulator is 1,200kV; each insulator comprises a mandrel, and a sheath and umbrella skirts which are arranged on the mandrel in a sleeving manner; voltage sharing rings are arranged at the two ends of the mandrels; a voltage sharing ring on the wire side is a double-layer voltage sharing ring. According to the 1,200kV extra-high voltage suspension type composite rod insulator, the double-layer voltage sharing ring is arranged on the wire side, and a special umbrella skirt design method is adopted, so that the 1,200kV extra-high voltage suspension type composite rod insulator has the advantages of light weight, strong strength, high hydrophobicity and hydrophobic mobility of a silicon rubber surface, high flashover voltage and the like, and the running requirements of an extra-high voltage power transmission line under extreme climate conditions of high humidity, high temperature and the like can be met.

Description

technical field [0001] The invention relates to a composite insulator, in particular to a 1200kV UHV rod-shaped suspension composite insulator. Background technique [0002] The research on UHV AC transmission technology began in the second half of the 1960s. At that time, the power industry in western industrial countries was in a period of rapid growth. The United States, the former Soviet Union, Italy, Canada, Germany, Japan, Sweden and other countries all formulated their own UHV s plan. The former Soviet Union began construction of 1150KV power transmission projects in the late 1970s, and completed the Ekibastuz-Kokchetaf-Kustanite high-voltage line in 1985. Japan began research on UHV power transmission in 1973, and has now built a 1000kV UHV power transmission line in the outer ring of Tokyo with a total length of 426 kilometers. However, my country's UHV AC transmission technology is still in its infancy. At present, my country's per capita power consumption level...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/04H01B17/48H01B17/50
CPCH01B17/325H01B17/48
Inventor 王政涛林慧郑琰张烽李宏伟张志伟郭慧豪任文静裴晓锋贾中伟何桂兰
Owner STATE GRID CORP OF CHINA
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