Fast Transient Boundary Control and Steady-State Operation of the Dual Active Bridge Converter Using the Natural Switching Surface

This paper presents a boundary control scheme for dual active bridge (DAB) converters using the natural switching surface (NSS). The implementation of a curved switching surface for DAB converters is a new area of research undertaken in this paper. The proposed technique brings the benefit of unprec...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2014-02, Vol.29 (2), p.946-957
Main Authors: Oggier, German G., Ordonez, Martin, Galvez, Juan M., Luchino, Federico
Format: Article
Language:English
Subjects:
Active control
Applied sciences
Boundary control
Bridge circuits
Circuit properties
Converters
Convertors
dc-dc isolated converters
dual active bridge (DAB) converter
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical equipment
Electrical machines
Electronic circuits
Electronics
Exact sciences and technology
Frequencies
Geometry
Inductors
natural switching surface (NSS)
Optimization
Regulation and control
Signal convertors
Steady-state
Surface chemistry
Switches
Switching
Topology
Trajectory
Transformers
Transformers and inductors
Transient analysis
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Summary:This paper presents a boundary control scheme for dual active bridge (DAB) converters using the natural switching surface (NSS). The implementation of a curved switching surface for DAB converters is a new area of research undertaken in this paper. The proposed technique brings the benefit of unprecedented dynamic performance, already developed for nonisolated topologies (e.g., buck and boost), to this more complex isolated topology. The analysis provides insight into the natural trajectories of the DAB converters and creates an accurate framework in the normalized geometrical domain. As a result, the physical limits of the converter under study become evident. Those physical limits are exploited by employing the NSS to obtain fast transient response under start-up, sudden load transients, and reference change. In addition, fixed-frequency operation is one of the key features of the proposed control scheme, which allows optimizing the design of the high-frequency transformer. Experimental results are presented to validate the NSS for DAB converters and illustrate the benefits of the normalization technique.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2013.2256150