基于模拟电荷法的微间隙场增强因子研究

doi:10.3969/j.issn.0372-2112.2016.04.035

电子学报 ›› 2016, Vol. 44 ›› Issue (4): 1003-1008.DOI: 10.3969/j.issn.0372-2112.2016.04.035

基于模拟电荷法的微间隙场增强因子研究

钟久明^1,2, 刘树林¹, 王玉婷¹, 韩长端¹, 刘锦涛¹

1. 西安科技大学电气与控制工程学院, 陕西西安 710054;
2. 海南师范大学物理与电子工程学院, 海南海口 571158

收稿日期:2014-10-13 修回日期:2015-07-17 出版日期:2016-04-25
- 通讯作者:
- 刘树林
- 作者简介:
- 钟久明 男,1975年8月出生于江西宁都,博士,研究领域为本质安全开关变换器、气体放电. E-mail:jiumingxyz@163.com
- 基金资助:
- 国家自然科学基金 (No.50977077,No.51277149)

Study on the Electric Field Enhancement Factor for Micro-Gap Based on CSM

ZHONG Jiu-ming^1,2, LIU Shu-lin¹, WANG Yu-ting¹, HAN Chang-duan¹, LIU Jin-tao¹

1. School of Electrical and Control Engineering, Xi'an University of Science & Technology, Xi'an, Shaanxi 710054, China;
2. School of Physic and Electronics Engineering, Hainan Normal University, Haikou, Hainan 571158, China

Received:2014-10-13 Revised:2015-07-17 Online:2016-04-25 Published:2016-04-25
- Supported by:
- National Natural Science Foundation of China (No.50977077, No.51277149)

摘要/Abstract

摘要：

运动电极下的微间隙是国际电工委员会推荐安全火花试验装置(IEC-STA)短路火花放电体系的核心组成部分,也是研究装置短路放电特性、揭示短路放电机理的关键性难点.为研究其短路放电特性,运用扫描电镜对其电极进行了扫描分析,重构了最危险打火情形下的电极表面形貌模型.基于模拟电荷法建立了阴极表面场强的数学模型,并对传统模拟电荷法进行了改进,给出了其参数设置、算法流程及病态矩阵处理方法,并对场增强因子进行了数值计算.数值计算结果表明,对于给定的微凸起高度,场增强因子与微凸起密度并不成简单的单调关系,而是存在使场增强因子最大的微凸起密度;对于给定的微凸起密度,在电极间距较大的情况下,场增强因子随间距成单调递减关系,反之,则随间距的减小而增大.数值计算结果为IEC-STA短路放电特性研究奠定了基础.

关键词: 微间隙, IEC安全火花试验装置, 短路放电, 模拟电荷法, 场增强因子

Abstract:

The moving electrode micro-gap is a core part of short-circuit spark discharge system of safety spark test apparatus (STA) specified by the international electrotechnical commission (IEC),it is the key difficulty of researching on IEC-STA short circuit discharge mechanism and characteristic.In order to establish the mathematical models of capacitive circuit short-circuit discharge on the IEC-STA,its electrodes are scanned with scanning electron microscope (SEM).A physical model of the electrodes micro surface in the most dangerous case is established.Mathematical models of IEC-STA cathode surface electric field are established by improved charge simulation method (CSM),the parameters setting,algorithm technological process and the method for ill-conditioned matrix are presented.The numerical computation for IEC-STA cathode surface electric field in different micro-protrude density being developed with CSM shows that there is one density which makes the electric field enhancement factor be the highest.The cathode surface electric field in different electrode-spacing being calculated with CSM shows that the enhancement factor decreases with the reduced electrode-spacing when the electrode-spacing is longer,while it increases with the reduced electrode-spacing when it is shorter.The results will prepare for the further research on the short-circuit discharge with IEC-STA.

Key words: micro-gap, IEC safety spark test apparatus, short-circuit discharge, charge simulation method, electric field enhancement factor

中图分类号:

O462

钟久明, 刘树林, 王玉婷, 等. 基于模拟电荷法的微间隙场增强因子研究[J]. 电子学报, 2016, 44(4): 1003-1008.

ZHONG Jiu-ming, LIU Shu-lin, WANG Yu-ting, et al. Study on the Electric Field Enhancement Factor for Micro-Gap Based on CSM[J]. Acta Electronica Sinica, 2016, 44(4): 1003-1008.

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基于模拟电荷法的微间隙场增强因子研究

Study on the Electric Field Enhancement Factor for Micro-Gap Based on CSM

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