A Simple Space Vector Modulation Method With DC-Link Voltage Balancing and Reduced Common-Mode Voltage Strategy for a Three-Level T-Type Quasi-Z Source Inverter

Single-stage converters based on an impedance source (IS) network merged with a multilevel inverter remain a trending research topic, from both the topological and control perspectives, because of their potential in applications involving renewable energy. This paper presents a new, simplified space...

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Bibliographic Details
Published in:IEEE access 2021, Vol.9, p.82747-82760
Main Authors: Mayorga, Nicolas, Roncero-Clemente, Carlos, Llor, Ana M., Husev, Oleksandr
Format: Article
Language:English
Subjects:
3-level T-type inverter
Aerospace electronics
Algorithms
Control methods
Converters
Dynamic response
Electric potential
Impedance
impedance source (IS) network
Inverters
Leakage currents
Modulation
Proportional integral
Pulse duration modulation
Space vector modulation
Space vector modulation (SVM)
Space vector pulse width modulation
Switches
Voltage
Voltage control
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Summary:Single-stage converters based on an impedance source (IS) network merged with a multilevel inverter remain a trending research topic, from both the topological and control perspectives, because of their potential in applications involving renewable energy. This paper presents a new, simplified space vector pulse-width modulation (SVPWM) for a three-phase three-level T-type quasi-impedance source inverter (3L-T-type qZSI). The benefits of the proposed modulation strategy include functionalities, such as boosting the input voltage and controlling the neutral-point (NP) voltage using the redundant small vectors, to mitigate the inner capacitors voltages imbalance. The proposed SVPWM guarantees a minimum common-mode voltage while preserving a very simple implementation, thus reducing the complex computations and cascaded proportional-integral (PI) control loops of the conventional SVPWM methods. The proposed algorithm can be applied to different multilevel inverter configurations combined with an IS network. A comprehensive simulation study and experimental results demonstrated the good performance of the proposed control method for dynamic response and imbalance conditions.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3087035