Investigation of a Circuit Model and a Control Strategy for the Generalized Cascaded Full-Bridge Converter

Samuel S. Queiroz; Demercil de S. Oliveira; Paulo P. Praca; Luiz Henrique S.C. Barreto

doi:10.1109/TCSII.2021.3103795

Investigation of a Circuit Model and a Control Strategy for the Generalized Cascaded Full-Bridge Converter

Samuel S. Queiroz, Demercil de S. Oliveira, Paulo P. Praca, Luiz Henrique S.C. Barreto

Research output: Contribution to journal › Article › Academic › peer-review

2 Citations (Scopus)

Abstract

This brief addresses an overall circuit model to represent a novel generalized cascaded full-bridge (GCF) converter. The synthesis methodology of the GCF converter uses full-bridge sub-modules (SMs) combined with the interleaving and cascading concepts. The time-dependent equations represented in terms of current and voltage magnitudes are obtained. Thus, it is possible to derive a comprehensive control system approach from the model. An improved control strategy provides power balancing while using the circulating current to balance the dc-link voltages and ensuring proper current sharing. A small-scale laboratory prototype of a static synchronous compensator (STATCOM) rated at 2.2 kVA/311 V validates the theoretical assumptions and statements.

Original language	English
Pages (from-to)	1337-1341
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	69
Issue number	3
DOIs	https://doi.org/10.1109/TCSII.2021.3103795
Publication status	Published - 1 Mar 2022
Externally published	Yes

Keywords

Circuit modeling
Multilevel systems
Parallel interleaved converters
Power balance

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10.1109/TCSII.2021.3103795

Cite this

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AB - This brief addresses an overall circuit model to represent a novel generalized cascaded full-bridge (GCF) converter. The synthesis methodology of the GCF converter uses full-bridge sub-modules (SMs) combined with the interleaving and cascading concepts. The time-dependent equations represented in terms of current and voltage magnitudes are obtained. Thus, it is possible to derive a comprehensive control system approach from the model. An improved control strategy provides power balancing while using the circulating current to balance the dc-link voltages and ensuring proper current sharing. A small-scale laboratory prototype of a static synchronous compensator (STATCOM) rated at 2.2 kVA/311 V validates the theoretical assumptions and statements.

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Investigation of a Circuit Model and a Control Strategy for the Generalized Cascaded Full-Bridge Converter

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Keywords

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