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.
CN106920607AInactive Publication Date: 2017-07-04CHINA ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA ELECTRIC POWER RES INST
Publication Date
2017-07-04
Estimated Expiration
Not applicable · inactive patent

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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.
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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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