A controllable surge arrester with trigger type overvoltage control switch with field distortion structure

A technology for controlling switches and arresters, applied in the direction of overvoltage protection resistors, resistors, non-adjustable metal resistors, etc., can solve the problems of the influence of arrester voltage distribution and increase the complexity of overvoltage protection.

Active Publication Date: 2022-06-21
XI AN JIAOTONG UNIV
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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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  • A controllable surge arrester with trigger type overvoltage control switch with field distortion structure
  • A controllable surge arrester with trigger type overvoltage control switch with field distortion structure
  • A controllable surge arrester with trigger type overvoltage control switch with field distortion structure

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[0025] The structural principle and working principle of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 . A controllable arrester with a trigger type overvoltage control switch with a field distortion structure of the present invention is composed of a trigger type overvoltage control switch with a field distortion structure and a zinc oxide arrester. Among them, the structure of the trigger type overvoltage control switch with field distortion structure is as follows figure 2 ,or image 3 As shown, the structure of the zinc oxide arrester is as follows Figure 4 shown. The zinc oxide arrester is composed of a fixed arrester and a controllable arrester in series, and a trigger type overvoltage control switch with a field distortion structure is connected in parallel with the controllable arrester of the zinc oxide arreste...

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Abstract

A controllable surge arrester with a trigger type overvoltage control switch with a field distortion structure, comprising a zinc oxide surge arrester and a trigger type overvoltage control switch with a field distortion structure, the zinc oxide surge arrester includes a fixed surge arrester connected in series and a controllable Lightning arrester, the controllable lightning arrester is connected in parallel with the trigger type overvoltage control switch with field distortion structure; the upper electrode of the fixed lightning arrester is connected with the upper end of the electric equipment to be protected, and the lower electrode of the controllable lightning arrester is connected with the electric equipment to be protected connected at the bottom. When the lightning overvoltage or operating overvoltage in the transmission and distribution network exceeds a certain threshold, the field distortion triggered overvoltage control switch is automatically turned on, thereby short-circuiting the controllable part of the arrester to limit the overvoltage at both ends of the arrester Amplitude purpose.

Description

technical field [0001] The invention relates to a trigger-type controllable arrester for overvoltage control switches in the fields of electric power, high-speed information railway power transmission and the like, in particular to a trigger-type overvoltage control switch controllable arrester with field distortion structure. Background technique [0002] Overvoltage protection is an important guarantee for the safe operation of power systems. With the improvement of the voltage level of the transmission and distribution grid, the overvoltage level will directly affect the selection of power equipment, manufacturing technology and engineering costs. 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 the arrester, it also plays a decisive role in the insulation level of the power equipment. Due to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12
CPCH01C7/126
Inventor 孙晋茹姚学玲陈景亮吴奕衡任佳欣
Owner XI AN JIAOTONG UNIV
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