Modified Topology and Modulation Technique for Z-Source Neutral-Point Clamped Inverter
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1
Department of Electrical Engineering, Mazandaran University of Science andTechnology, Babol, Iran
2
Department of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
Corresponding author
Farhad Zishan
Department of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
Power Electronics and Drives 2022;7 (42):210-226
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ABSTRACT
The impedance network makes it possible to increase and decrease the voltage, which is not available in normal inverters (voltage and
current sources).This paper presents a modified topology and modulation technique for a three-phase Modified Z-Source Neutral-Point
Clamped (MZS-NPC) inverter. A modulation scheme for the proposed topology is designed based on maximum gain control method to
achieve the maximum voltage gain by simple implementation and balancing the neutral point voltage of the dc link. In order to supply
the desired voltage to the critical load in an islanded micro-grid, a closed-loop ac voltage controller is realized in fuel cell or photovoltaic
applications based on the proposed inverter. The ability to reinforce and validity of topology operations and modulation techniques has
been demonstrated by simulation. It should be noted that the simulations are implemented in MATLAB / Simulink software.