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
CN101847477BActive Publication Date: 2012-05-09FUSHUN ELECTRIC PORCELAIN MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUSHUN ELECTRIC PORCELAIN MFG CO LTD
Publication Date
2012-05-09

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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.
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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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