基于混合七电平电压型逆变器的新型6kV变频器  

New 6 kV drive based on hybrid 7-level voltage sourced inverter

作　　者：刘文华[1] 陈远华[1] 宋强[1] 李建国[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《中国电力》2005年第8期10-14,共5页Electric Power

摘　　要：提出了一种基于混合七电平电压型逆变器的6kV变频器。混合七电平逆变器由1个采用IGCT的三相中点箝位三电平逆变器和3个采用IGBT的H桥逆变器串联而成,可充分利用IGCT高压大容量及IGBT高速的特点。PWM控制采用基于参考电压分解的多电平直接PWM算法,数字化实现容易。采用了改进的死区效应补偿方法以获得理想的输出波形。研制了1台基于混合七电平逆变器的交流380V变频调速实验样机。实验结果为新型6kV变频器工业装置的研制打下了基础。A 6 kV drive based on hybrid 7-level Voltage Sourced Inverter （VSI） was proposed. Hybrid 7-level VSI is composed of a NPC three-level VSI employing IGCTs and three H-bridge VSI employing IGBTs, it can fully use the high capacity and voltage of IGCT and the high switching speed of IGBT, A multilevel direct PWM control strategy based on reference voltage decomposition suitable for digital implementation was employed. A modified dead time compensation method was used to obtain better output voltage waveforms. An experimental drive system based on hybrid 7-level inverter was developed. Various experimental results laid the foundation for the development of the new industrial drive.

关 键 词：高压变频器 IGCT PWM控制 混合多电平逆变器 

分 类 号：TN773[电子电信—电路与系统]