Switching algorithm for single Z-source boost multilevel inverter with ability of voltage control

• Published in: IET power electronics Vol. 6; no. 7; pp. 1350 - 1359
• Main Authors: Banaei, Mohamad Reza, Dehghanzadeh, Ali Reza, Fazel, Ali, Oskouei, Aida Baghbany
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.08.2013; The Institution of Engineering & Technology
• Subjects: cascade networks; cascaded transformer‐based multilevel inverter; DC voltage source; Electric potential; harmonic distortion; Inverters; invertors; Matlab; Multilevel; Networks; PCI‐1716 data acquisition system; Simulink; switching algorithm; switching convertors; Switching theory; THD; Topology; total harmonic distortion; transformers; Voltage; voltage control; Z network shoot‐through state control; Z network topology; Z‐source boost multilevel inverter; cascade networks; Z network shoot-through state control; transformers; harmonic distortion; Z-source boost multilevel inverter; Simulink; switching convertors; THD; invertors; cascaded transformer-based multilevel inverter; Z network topology; switching algorithm; PCI-1716 data acquisition system; total harmonic distortion; voltage control; DC voltage source; Matlab
• ISSN: 1755-4535; 1755-4543; 1755-4543
• DOI: 10.1049/iet-pel.2012.0636

This study proposes a new topology of cascaded transformer-based multilevel inverter using single Z-source. The suggested circuit consists of only one Z network and one DC voltage source; as a result installation area is reduced. In this topology, the output voltage amplitude is not limited to DC voltage source similar to traditional cascaded transformer-based multilevel inverter and can be increased with Z network shoot-through state control flexibly. Besides, the same as traditional Z-source inverter, it is more reliable against short circuit. Also, a particular switching algorithm has been suggested for presented inverter, which can obtain total harmonic distortion (THD) of output voltage nearly constant for different boost ratio. Moreover, as compared to traditional Z-source inverter, the THD of output voltage is decreased in the suggested topology. The performance of proposed inverter and switching algorithm are validated with simulation results using MATLAB/SIMULINK software and experimental results based PCI-1716 data acquisition system.