摘要
五电平NPC/H桥型变流器是从三电平NPC变流器的拓扑结构发展而来的,它具有输出电压谐波含量小,容量大,易于实现模块化等优点,适用于高压大功率调速系统场合。本文主要对单相NPC/H桥型变流器的拓扑结构特点进行分析,研究了NPC/H桥变流器的工作原理及其换流过程和数学模型,分析了杂散电感对换流过程的影响和换流过程中的IGCT过电压。通过仿真验证上述分析是正确的。
The five-level NPC/H bridge converter is evolved from the three-level NPC one. It has the advantages of small output voltage harmonic content, high power capacity and being easy to implement modular design, which is applicable to the high-voltage high-power adjustable speed control system. In this paper, the topology characteristics of a single-phase NPC/H converter bridge is analyzed, the work principle, the commutation process and the mathematical model of the NPC/H converter are investigated, and the influence of the stray inductance on the commutation process and the over voltage of IGCT is analized. The above analysis is conformed by simulation results.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第6期169-175,共7页
Transactions of China Electrotechnical Society
基金
国家高科技研究发展计划(863计划)资助项目(2011AA050403)
关键词
NPC/H桥
换流过程
杂散电感
状态方程
NPC/H bridge
commutation process
stray inductance
equation of state
