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

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 te...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2022-03, Vol.69 (3), p.1337-1341
Main Authors: Queiroz, Samuel S., Oliveira, Demercil de S., Praca, Paulo P., Barreto, Luiz Henrique S. C.
Format: Article
Language:English
Subjects:
Circuit modeling
Circuits
Circuits and systems
Current sharing
Electric converters
Equivalent circuits
Integrated circuit modeling
Load balancing
Mathematical model
Modulation
multilevel systems
parallel interleaved converters
power balance
Static synchronous compensators
Topology
Voltage control
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Summary: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.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2021.3103795