A Comparison of Control Methods for Z-Source Inverter

Cong-Thanh Pham, Anwen Shen, Phan Quoc Dzung, Nguyen Bao Anh, Nguyen Xuan Phu

Dept of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan, China.
HCMC University of Technology, Ho Chi Minh City, Vietnam.

DOI: 10.4236/epe.2012.44026                

Abstract

In recent years, Z-source inverters (ZSI) have been proposed as an replacement power conversion concept which it has both voltage buck and boost abilities. In addition, ZSI doesn’t require dead-time to protection short circuit at two switches any of the same phase leg in the inverter bridge and to achieve optimal harmonic of current, voltage. This paper presents two different control methods (CM) for ZSI. The aim of this study to compare between two modulation methods, there are modi?ed space vector pulse width modulation method (MSVM) and the simple boost control (SBC) about the unique harmonic performance features, the total average and peak switching device power of the inverter system. In addition, this paper also analyzes about the ability exceed modulation index in linear region of two CM using MATLAB/Simulink.

Keywords

Buck-Boost; Current Source Inverters (CSIs); Pulse-Width Modulation (PWM); Voltage Source Inverters (VSIs); Z-Source Inverters (ZSI)

Conflicts of Interest

The authors declare no conflicts of interest.

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