Transient Characteristics of Field-Breakdown Trigger Circuit for Active Surge Protection Gap

doi:10.7652/xjtuxb201702017

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Transient Characteristics of Field-Breakdown Trigger Circuit for Active Surge Protection Gap

更新时间：2025-07-09

- Transient Characteristics of Field-Breakdown Trigger Circuit for Active Surge Protection Gap
- Vol. 51, Issue 2, Pages: 104-110(2017)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201702017
  CLC： TM862
- Online First：10 February 2017，
  
  Published：2017
- 稿件说明：
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Transient Characteristics of Field-Breakdown Trigger Circuit for Active Surge Protection Gap[J]. 2017, 51(2): 104-110.
DOI：

Transient Characteristics of Field-Breakdown Trigger Circuit for Active Surge Protection Gap[J]. 2017, 51(2): 104-110. DOI： 10.7652/xjtuxb201702017.

摘要

针对主动型过电压保护间隙(SPG)研究中仅从触发回路的结构及材料角度难以分析其性能差异的机理

通过建立组合波注入下触发回路的等效模型

获得了触发回路输出电压的暂态解析式。基于触发回路的电压动作过程、触发电流与主间隙电流的数值关系、发生时序的理论分析及实验验证

得出了触发回路响应时间及保护间隙击穿电压的变化规律。研究发现:触发回路中耦合气体放电管动作滞后于压敏电阻

其动作时刻主间隙两端电压约为压敏电阻阈值电压U

1 mA

与耦合气体放电管动作电压U

之和; 触发电流I

在时间上先于主间隙电流I

出现

但在数值上I

远小于I

; 触发回路中耦合气体放电管及触发间隙的响应时间t

、t

随冲击电压峰值U

的增大而减小

与之对应的主动型SPG的响应时间t

及压比K远小于被动型SPG约2.224 μs的响应时间及2.42的压比。该结果可为主动型过电压保护间隙触发特性的研究及优化提供理论与实验基础。

Abstract

To overcome the difficulties in analyzing the mechanism of performance differences among the active surge protection gaps(SPG)by merely changing the structures or materials of trigger circuits

an output voltage transient formula of the trigger circuit is obtained by establishing an equivalent model of the trigger circuit under combined wave. On the basis of the quantitative analysis and experiment

the trigger circuit dynamic voltage changing sequences

the numerical relationship and action series between the trigger current and main gap current

the response time of the trigger circuit

and th

e voltage changing regularities of SPG are obtained. It is found that: the coupled gas discharge tube in the trigger circuit lag acts behind the varistors; the voltage of main gap approximately reaches the sum of threshold voltage of varistor U

1 mA

and gas discharge tube action voltage U

while gas discharge tube acts; the trigger current I

appears before main gap current I

but is much smaller than I

; the response time of the coupled gas discharge tube t

and the trigger gap t

decrease with the increasing impulse peak voltage; and the response time t

and the voltage ratio K of the active SPG are far less than the values 2 μs and 2.42 of the passive SPG.

关键词

Keywords

references

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Related Author

杨怀洲 1

李增智 1

Related Institution

西安交通大学计算机系统结构与网络研究所

北京邮电大学网络与交换技术国家重点实验室

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