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Controllable lightning arrester based on trigger type overvoltage control switch with antifouling structure

A technology for controlling switches and arresters, used in overvoltage protection resistors, resistors, non-adjustable metal resistors, etc., can solve the problems of the influence of arrester voltage distribution, increase the complexity of overvoltage protection, etc., and achieve the improvement of volt-ampere characteristics, The effect of low charge rate and low leakage current

Active Publication Date: 2021-12-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there are serious defects in the following two aspects: ①Due to the limitation of the thyristor voltage, many thyristors need to be connected in series under high voltage conditions, and the technical problem of synchronous triggering needs to be solved; ②Because the thyristor is affected by its voltage change rate dU / dt and current change The limitation of the rate dI / dt requires additional voltage and current limiting measures to protect it, which increases the complexity of overvoltage protection and also has a relatively large impact on the voltage distribution of the arrester

Method used

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  • Controllable lightning arrester based on trigger type overvoltage control switch with antifouling structure
  • Controllable lightning arrester based on trigger type overvoltage control switch with antifouling structure
  • Controllable lightning arrester based on trigger type overvoltage control switch with antifouling structure

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Embodiment Construction

[0024] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] see figure 1 , the present invention includes a zinc oxide arrester and a surface-triggered overvoltage control switch with an anti-pulse arc pollution structure. The surface trigger type overvoltage control switch is connected in parallel; the upper electrode of the fixed arrester is connected with the upper end of the protected electrical equipment, and the lower electrode of the controllable arrester is connected with the lower end of the protected electrical equipment; the controllable arrester is connected with the lower end of the protected electrical equipment. An automatic energy coupling trigger circuit is connected between the surface trigger type overvoltage control switches with pulse arc pollution prevention structure. The automatic energy coupling trigger circuit is a two-p...

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Abstract

A controllable lightning arrester with a surface-triggered overvoltage control switch with an antifouling structure is formed by combining the surface-triggered overvoltage control switch and a zinc oxide lightning arrester. The zinc oxide lightning arrester is divided into a fixed lightning arrester and the controllable lightning arrester, and the surface trigger gas overvoltage control switch is connected in parallel with the controllable part of the lightning arrester. When lightning overvoltage or operation overvoltage occurring in a power transmission and distribution network exceeds a certain threshold value, the surface trigger type gas overvoltage control switch with the antifouling structure automatically acts, so that the controllable part of the lightning arrester is short-circuited, and the purpose of limiting the overvoltage amplitude at the two ends of the whole lightning arrester is achieved. When lightning overvoltage and operation overvoltage occur, the surface trigger type overvoltage control switch with the antifouling structure automatically acts, and the controllable part of the lightning arrester is short-circuited, so that the operation overvoltage or the impact residual voltage is obviously reduced to the impact residual voltage value of the fixed part.

Description

technical field [0001] The invention relates to a controllable surge arrester in the fields of electric power, high-speed information railway power transmission, etc., in particular to a controllable surge arrester based on a trigger-type overvoltage control switch with an anti-fouling structure. Background technique [0002] Overvoltage protection is an important guarantee for the safe operation of power systems. With the increase of the voltage level of the power transmission and distribution network, the overvoltage level will directly affect the selection, manufacturing technology and engineering cost of power equipment. Among them, the operating overvoltage is the decisive factor for the insulation level of the power system. At the same time, since the protection level of lightning overvoltage is also the main performance evaluation index of arresters, it also plays a decisive role in the insulation level of power equipment. Due to the restriction of the technical perf...

Claims

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Application Information

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IPC IPC(8): H01C7/12
CPCH01C7/126
Inventor 姚学玲雷望龙孙晋茹陈景亮乐杨晶
Owner XI AN JIAOTONG UNIV
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