脉冲电压作用下晶闸管反向恢复期二次导通特性  

Secondary conduction characteristics of thyristor caused by pulse voltage during reverse recovery period

作　　者：陈炫宇 岳珂[1] 陶风波 庞磊[1] 张乔根[1] CHEN Xuan-yu;YUE Ke;TAO Feng-bo;PANG Lei;ZHANG Qiao-gen(School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;Electric Power Research Institute, State Grid Jiangsu Electric Power Co.Ltd. , Nanjing 211103, China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]国网江苏省电力有限公司电力科学研究院,南京211103

出　　处：《沈阳工业大学学报》2020年第4期379-384,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金面上项目(61772408);国家电网公司科技项目(SGJSDK00KJJS1800292)。

摘　　要：为了更好地认识脉冲电压作用下晶闸管反向恢复期二次导通特性,搭建了对应的实验研究平台,在利用小信号模型对二次导通过程进行理论分析的基础上,研究了脉冲电压幅值及脉冲施加时刻对高压大功率晶闸管反向恢复期二次导通特性的影响.结果表明,高压大功率晶闸管在反向恢复期内,容易因脉冲电压作用而发生二次导通,正向电压临界上升率极大降低;当通态电流幅值相同时,随施加脉冲延时的增大,引起晶闸管二次导通的脉冲电压幅值呈S型增长.In order to better understand the secondary conduction characteristics of thyristor caused by pulse voltage during reverse recovery period,a corresponding experimental platform was built.Based on the theoretical analysis of secondary conduction process with a small-signal model,the effects of pulse voltage amplitude and pulse applying moment on the secondary conduction characteristics of thyristor with high voltage and power during the reverse recovery period were studied.The results show that the thyristor with high voltage and power is liable to generate secondary conduction due to the effect of pulse voltage during the reverse recovery period,and the critical increasing rate of forward voltage greatly reduces.When the amplitude of on-state current remains unchanged,the pulse voltage causing the secondary conduction of thyristor increases in an S-shape curve mode with the increase of applied pulse delay.

关 键 词：脉冲电压 大功率晶闸管 反向恢复期 二次导通 晶闸管阀 保护策略 载流子 

分 类 号：TN34[电子电信—物理电子学]