高电压技术2018，Vol.44Issue(2)：395-402,8.DOI:10.13336/j.1003-6520.hve.20180131008
固态限流器中大功率IGCT并联关断保护电路
Protection Circuit for Large Power Parallel Connected IGCTs Turning off in a Solid State Fault Current Limiter
琚兴宝 1彭振东 2肖友国 2孙海顺 1周鑫1
作者信息
- 1. 强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074
- 2. 武汉船用电力推进装置研究所,武汉430064
- 折叠
摘要
Abstract
Possessing the characteristics of relatively low on-state loss,as well as very quickly,uniformly and reliably turning off process for a large current,the integrated gate commutated thyristor (IGCT) has gained comprehensive advantages in a solid state fault current limiter (SSFCL).Aiming at the parallel connected large power IGCTs in a SSFCL,we simulated the turning off process through a lump charge IGCT model developed in this paper.Then,we studied the effects of RC snubber & metal oxide varistor protection on the parallel IGCTs turning off characteristics with the help of some related tests.The large current turning-off research results indicate that the current crowding phenomena can be relieved further,the falling rate of tail current may be reduced a lot and the dynamic avalanche breakdown will be alleviated very much for the parallel IGCTs turning off with a RC snubber.The turning off process for the parallel devices will be more reliable if an additional RC snubber is adopted in a SSFCL with large current and circuit inductance.These achievements can be taken as references for designing valid parallel IGCTs protection schemes.关键词
集成门极换流晶闸管/固态限流器/并联运行/关断保护/RC缓冲/压敏电阻Key words
integrated gate commutated thyristor/solid state fault current limiter/parallel operation/turning off protection/RC snubber/metal oxide varistor引用本文复制引用
琚兴宝,彭振东,肖友国,孙海顺,周鑫..固态限流器中大功率IGCT并联关断保护电路[J].高电压技术,2018,44(2):395-402,8.
