载流子寿命与高压晶闸管反向恢复特性的关系  

Correlations Between Carrier Lifetime and Reverse Recovery Characteristics of High Power Thyristors

作　　者：岳珂[1] 孙玮[2] 刘隆晨 孔德志[1] 庞磊 张乔根[1] YUE Ke;SUN Wei;LIU Longchen;KONG Dezhi;PANG Lei;ZHANG Qiaogen(State Key Laboratory of Electrical Insulation and Power Equipment, Xi＇an Jiaotong University, Xi＇ an 710049, China;Wuyi University, Wuyishan 354300, China;Electric Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu 610072, China)

机构地区：[1]西安交通大学电气设备电气绝缘国家重点实验室,西安710049 [2]武夷学院,武夷山354300 [3]国网四川省电力公司电力科学研究院,成都610072

出　　处：《高电压技术》2017年第12期3944-3949,共6页High Voltage Engineering

摘　　要：掌握晶闸管反向恢复特性对改进晶闸管换流阀电压分布、降低换相失败具有重要意义。为研究晶闸管的反向恢复特性,文中从外部电路条件和内部物理设计参数两个方面,通过实验方法对高压晶闸管的反向恢复特性作了较为深入的探讨。实验研究了工频电流对高压晶闸管反向恢复过程的影响,并将器件的外特性与内部物理过程相联系,通过分析反向恢复时间与载流子寿命的关系,得到少数载流子(简称少子)寿命对高压晶闸管反向恢复特性的影响规律,并分析了反向恢复特性对晶闸管阀暂态特性的影响。结果表明,在正弦电流波形和大注入的情况下,少子寿命与反向恢复存储时间相近;影响反向恢复特性的主要因素是少子寿命,高压晶闸管串联应满足少子寿命相等或近似的条件。The reverse recovery characteristics of high power thyristors is important to improve the voltage distribution and reduce the commutation failure of HVDC thyristor valve. Consequently, we studied the reverse recovery characteristics of high power thyristors in two aspects, nanmely, external operating conditions and internal device parameters. Moreover, we experimentally studied the effect of power frequency current on reverse recovery characteristics of high power thyristors by, combining terminal characteristics with internal physical process, and established the relationship of carrier lifetime and reverse recovery time. Thereafter, the influence of reverse recovery characteristics on thyristor valve was analyzed. The results show that the high-level injection lifetime is approximately equal to the reverse recovery storage time with a sine wave; the dominant factor affecting reverse recovery characteristics is lifetime; to meet the demands of voltage and current of high power thyristors, thyristor valve should take thyristors series with the same or similar life- time.

关 键 词：直流输电 晶闸管 反向恢复 晶闸管阀 暂态特性 载流子寿命 

分 类 号：TM721.1[电气工程—电力系统及自动化] TN34[电子电信—物理电子学]