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Space Vector Pulsewidth Modulation Strategy for Multilevel Cascaded H-Bridge Inverter With DC-Link Voltage Balancing Ability
Abstract
Space vector pulsewidth modulation (SVPWM) algorithms for cascaded H-bridge multilevel (CHB ML) inverter usually provide the possibility of using several combinations of active voltage vectors to generate the same output voltage vector. For preselected H-bridges, some of them may generate output voltages opposite to the assumed direction. This results in the change of the dc-link voltages of these H-bridges in the opposite direction to the assumed direction in the ordering algorithm. Consequently, these algorithms are characterized by undue constraints and narrow possibilities of dc-link voltage balancing. In the proposed control algorithm, CHB ML inverter is treated as groups of successively activated three-level inverters; depending on the length of the reference voltage vector. These three-level inverters consist of three H-bridges selected from each phase. The proposed extended selection method enables firm-grip control of the dc-link voltages. For a given direction of phase currents, the possibility of using H-bridges with lowest and highest dc-link voltages is simultaneously analyzed. Additionally, each of the three-level inverters is controlled by one of three proposed alternative modulation methods for which both the attainable output voltage vectors and unbalanced dc-link voltages are predicted. Simulation and experimental results confirm the correctness of the algorithm execution.
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Authors (3)
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Charles Odeh
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1109/TIE.2022.3158005
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
no. 70,
pages 1161 - 1170,
ISSN: 0278-0046 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Lewicki A., Odeh C., Morawiec M.: Space Vector Pulsewidth Modulation Strategy for Multilevel Cascaded H-Bridge Inverter With DC-Link Voltage Balancing Ability// IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS -Vol. 70,iss. 2 (2023), s.1161-1170
- DOI:
- Digital Object Identifier (open in new tab) 10.1109/tie.2022.3158005
- Verified by:
- Gdańsk University of Technology
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