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Gap control type metal oxide lightning arrester

A lightning arrester and oxide technology, which is applied in the field of arresters, can solve the problems such as the difficulty in solving the gap discharge voltage dispersion and the poor reliability of the arrester, and achieve the effects of improving the protection level, improving the operational reliability and improving the bending strength.

Inactive Publication Date: 2017-07-04
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 1980s, researchers at home and abroad have discussed and studied the situation of the series and parallel discharge gaps of metal oxide arresters, but it is difficult to solve the dispersion of the gap discharge voltage, and the reliability of the arrester is poor.

Method used

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  • Gap control type metal oxide lightning arrester
  • Gap control type metal oxide lightning arrester
  • Gap control type metal oxide lightning arrester

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Embodiment Construction

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] For a thorough understanding of the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the special details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

[0038] The overall structure of the gap-controlled metal oxide arrester provided by the present invention is as follows: figure 1 shown. The arrester includes unit sections connected in series in the vertical direction, and a pressure equalizing ring 5 is installed on the top unit section; each unit section includes an external insulating sleeve and a metal ox...

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Abstract

The invention provides a gap control type metal oxide lightning arrester. The lightning arrester comprises unit sections which are sequentially connected in series in a vertical direction, wherein each unit section comprises an external insulation sleeve and a metal oxide resistance sheet, the metal oxide resistance sheet is arranged in the insulation sleeve, two ends of a bottom unit section of the lightning arrester are connected in parallel with a control unit, the control unit comprises a gap and a controller, the controller is connected with the gap, the controller is used for detecting voltages of two ends of the lightning arrester and simultaneously triggering the gap to be conducted according to the detected voltage values, and the bottom unit section is short-circuited when the gap is conducted. With the lightning arrester provided by the invention, the residual voltage of the lightning arrester can be reduced on the basis of maintaining a performance parameter of the metal oxide resistance sheet for an existing lightning arrester unchanged, and the protection level and the shock-resistant performance of the lightning arrester are improved.

Description

technical field [0001] The invention relates to a lightning arrester, in particular to a gap-controlled metal oxide arrester. Background technique [0002] Starting from the ultra-high voltage (330kV ~ 750kV) power transmission system, the operating overvoltage has already played a role in controlling the insulation level of the power transmission and transformation equipment. The limit is getting lower and lower. In ultra-high voltage power transmission systems, the operating impulse discharge voltage of the air gap exhibits saturation characteristics, and the operating overvoltage level has a greater impact on the cost and manufacturing difficulty of power transmission and transformation equipment. Insulation level is very necessary. [0003] Lightning arrester is the main device for overvoltage protection of power system. The arrester resistor sheet has developed from silicon carbide (SiC) as the main raw material in the early days to zinc oxide (ZnO) as the main raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/12H01C1/026
CPCH01C7/123H01C1/026
Inventor 陈维江陈秀娟殷禹李志兵刘之方李志远
Owner CHINA ELECTRIC POWER RES INST
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