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Abstract
The deployment of a space vector pulsewidth modulation (SVPWM) scheme in controlling cascaded H-bridge multilevel inverter (CHB MLI) is quite challenging; especially, when a substantial number of output voltage levels are involved and the dc-link voltages are out of balance. In this article, a simple SVPWM algorithm for CHB MLI is proposed. In the proposed algorithm, all the H-bridges in an inverter phase are treated as a single H-bridge. Consequently, the CHB MLI can be treated as a three-level cascaded H-bridge (CHB) inverter, regardless of the number of series-connected H-bridges. This approach simplifies the construction of the space vector diagram even in dc-link voltage imbalance scenarios. The proposed voltage balancing strategy is based on two approaches: interphase balancing and energy exchange between H-bridges in a phase of the CHB MLI. The former is realized by the appropriate selection of active vectors for an equivalent three-level CHB inverter. The latter is realized through the appropriate distribution of duty factors, determined in the first step of the algorithm; their unity or zero values operate the H-bridges in actively connected or bypassed modes in view of commutation losses reduction. Simulation and experimental results are presented for the authentication of the proposed algorithm on a seven-level CHB MLI.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
IEEE TRANSACTIONS ON POWER ELECTRONICS
no. 39,
pages 13248 - 13261,
ISSN: 0885-8993 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Lewicki A., Odeh C., Morawiec M.: Hybridized SVPWM Algorithm for Multilevel CHB Inverter With DC-Link Voltage Control Capability// IEEE TRANSACTIONS ON POWER ELECTRONICS -Vol. 39,iss. 10 (2024), s.13248-13261
- DOI:
- Digital Object Identifier (open in new tab) 10.1109/tpel.2024.3426073
- Sources of funding:
-
- IDUB
- Verified by:
- Gdańsk University of Technology
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