一种增强型Z源逆变器的研究

Study on an Enhanced Z-Source Inverter

针对在低功率因数以及Z源电感值较小的情况下,Z源逆变器二极管电流断续引起的直流链电压畸变的问题,研究了一种电容辅助增强型准Z源逆变器。深入分析Z源逆变器非正常工作状态产生的原因,利用Matlab/Simulink对电容辅助增强型准Z源逆变器和传统准Z源逆变器进行仿真分析。仿真结果表明,在低功率因素及Z源电感值较小的运行条件下,该增强型Z源逆变器可较好地解决直流链电压畸变的问题,有效改善逆变器输出电压的质量,简化Z源电感的设计。

In view of Z-source inverter diode current interruption resulting in DC link voltage distortion under the conditions of low power factor or small Z-source inductance value, studies a capacitor-assisted enhanced quasi-Z-source inverter（qZSI）. Analyzes the cause of the Z-source inverter abnormal operating states and simulates the capacitor-assisted enhanced qZSI and the traditional qZSI by Matlab/Simulink. The results indicate that the proposed qZSI can better solve the problem of the DC link voltage distortion under the operating conditions of low power factor or small Z-source inductance value, and it improves the output voltage of Z-source inverter effectively and simplifies the inductor design.