中国电机工程学报2016，Vol.36Issue(2)：317-326,587,11.DOI:10.13334/j.0258-8013.pcsee.2016.02.001
基于IGCT串联的10 kV直流混合断路器研究
Researches on 10 kV DC Hybrid Circuit Breaker Based on IGCT Series
摘要
Abstract
DC circuit breaker is one of the key technologies of DC power grid networking. This paper analyzed the influence of voltage, turn-off current, snubber resistor and capacitor, and stray inductance on the dynamic characteristics of IGCT. Then taking two integrated gate commutated thyristors (IGCT) series system as an example, the characteristics of unbalanced voltage-sharing caused by the difference of snubber resistor and capacitor, stray inductance and trigger time were studied. The results showed that the trigger time synchronization had the greatest impact on voltage-sharing. To improve series characteristics, trigger time should be adjusted, and consistency of devices and valve body parameters should be improved, etc.. Then, this paper presented a hybrid breaker topology based on natural current transfer, which had low conduction loss, no water cooling system, simple control logic and high reliability. Based on IGCT characteristics analysis, appropriate parameters was selected, and a four IGCT series system was set up, which successfully turned off 3.5 kA under 10 kV, with nonuniformity coefficientof 5%; combining with fast mechanical switch, the 10 kV DC hybrid circuit breaker was developed and successfully turn off 3.6 kA with overvoltage of 21.4 kV, which verified the feasibility of this topology. Recently, 40 kV/3.4 kA experiment had been completed, which had laid a solid foundation for practical engineering application of the high voltage DC circuit breaker.关键词
直流混合断路器/集成门极换流晶闸管/串联/自然换流Key words
DC hybrid circuit breaker/integrated gate commutated thyristors (IGCT)/series/natural current transfer分类
信息技术与安全科学引用本文复制引用
陈政宇,余占清,吕纲,黄瑜珑,曾嵘,陈名,赵宇明,黎小林,温伟杰..基于IGCT串联的10 kV直流混合断路器研究[J].中国电机工程学报,2016,36(2):317-326,587,11.基金项目
国家863高技术基金项目(2013AA050103). The National High Technology Research and Development of China 863 Program (2013AA050103). （2013AA050103）
