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Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester

A lightning arrester, porcelain sleeve technology, applied in the direction of overvoltage protection resistors, varistors, etc., can solve the problems of inability to apply to AC UHV grid, limited energy absorption and protection performance, achieve uniform potential distribution, and improve protection performance. , the effect of improving energy absorption

Active Publication Date: 2012-05-09
FUSHUN ELECTRIC PORCELAIN MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its limited energy absorption and protection performance, it cannot be applied to the AC UHV grid

Method used

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  • Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester
  • Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester
  • Ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester

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Embodiment Construction

[0012] see figure 1 , The height of the arrester assembly is 13125mm, the height of each arrester element 2 is 2360mm, the maximum outer umbrella diameter is φ750mm, and the total weight is 7500kg. The surge arrester is composed of five independent components connected in series, each component is separated by a backing plate, a voltage equalizing ring 1 is installed on the top of the surge arrester, and the lower part is fixed to the foundation through an insulating base.

[0013] The pressure equalizing ring is a four-ring three-layer structure, and the material is aluminum alloy. The maximum outer diameter of the ring is φ3660mm, the diving depth is 2300mm, and the outer diameter of the aluminum tube is φ200mm.

[0014] see figure 2 , the inside of the surge arrester adopts four-column, φ136mm resistance piece 3 parallel structure, and the four-column resistance piece in each element is divided into five groups by the current equalizing connection plate 4; each group con...

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Abstract

The invention provides an ultra-high voltage porcelain bushing type zero-clearance zinc oxide lightning arrester. The problem to be solved by the invention is that the lightning arrester used at present is formed by connecting four and less than four lightning arrester elements in series to be fixed on a base; and due to the limited energy absorption and protective properties, the present lightning arrester can not be applicable to alternating-current ultra-high voltage power grids. The invention is characterized in that the lightning arrester is composed of five lightning arrester elements which are connected in series; the top end of the lightning arrester is provided with an equalizing ring; the interior of the lightning arrester adopts a structure of four-column resistor piles which are connected in parallel; the four-column resistor piles in each element are divided into five groups through current-equalizing connecting plates; and the interior of each lightning arrester element is provided with a parallel capacitor bank, wherein the upper section is connected with the four-column capacitor in parallel, the upper two sections are connected with a five-column capacitor in parallel, and the upper three sections are connected with a two-column capacitor in parallel. The invention is applicable to 1000-kilovolt alternating-current ultra-high voltage power transmission engineering.

Description

technical field [0001] The invention belongs to an ultra-high voltage AC zinc oxide arrester, in particular to a porcelain sleeve type gapless zinc oxide arrester suitable for 1000 kV AC ultra-high voltage power transmission projects. Background technique [0002] In order to further optimize the allocation of power resources, my country will build a 1,000-kilovolt AC UHV power grid to realize long-distance and large-scale power transmission across regions and reduce power loss. The 1000 kV AC UHV surge arrester must have: large energy absorption, good protection characteristics, and safe and stable long-term operation. At present, the arresters used in AC ultra-high voltage transmission projects of 750 kV and below are generally composed of four-section and below arrester components connected in series, and the interior of the arrester components is a single-column resistor sheet. Due to its limited energy absorption and protection performance, it cannot be applied to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12
CPCH01C7/12
Inventor 叶立茂刘起江张海滨王利民吕宏刘飞何维涛于清波孙光宝
Owner FUSHUN ELECTRIC PORCELAIN MFG CO LTD
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