A Reduced Switch Count Single-Stage Three-Phase Bidirectional Rectifier With High-Frequency Isolation

Dual active bridge (DAB) based converters offer the benefit of smaller volume due to high-frequency isolation and controllability of active power flow, making them attractive for various applications, such as renewable energy generation, plug-in hybrid vehicles, and distribution systems. This paper...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2018-11, Vol.33 (11), p.9520-9541
Main Authors: Baranwal, Rohit, Iyer, Kartik V., Basu, Kaushik, Castelino, Gysler F., Mohan, Ned
Format: Article
Language:English
Subjects:
AC-DC converters
Bridge circuits
Controllability
Dual active bridge (DAB)
Electric bridges
Electric converters
Electronic devices
Frequency conversion
Frequency modulation
high-frequency (HF) link
Hybrid systems
Hybrid vehicles
Inductance
isolated converter
power electronic transformer (PET)
Power factor
Power flow
Power transfer
Rectifiers
single stage
soft switching
solid-state transformer (SST)
Stability
Switches
Switching
Topology
unity power factor
Windings
zero current switching (ZCS)
zero voltage switching (ZVS)
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Summary:Dual active bridge (DAB) based converters offer the benefit of smaller volume due to high-frequency isolation and controllability of active power flow, making them attractive for various applications, such as renewable energy generation, plug-in hybrid vehicles, and distribution systems. This paper presents a novel converter topology along with a modulation strategy for a DAB-based three-phase ac to dc converter. The major benefits are single-stage conversion, no unreliable intermediate dc-link capacitor, reduced number of switches, i.e., only two active switches on the ac side, simple control scheme, open-loop unity power factor operation, bidirectional power flow, and partial soft-switching. This paper presents the analysis of all the operating modes of the converter, resulting in the analytical estimation of power transfer and rms winding current and investigation of soft-switching conditions for the power devices. Simulation and experimental results have been presented to demonstrate the advantages of the proposed technique and accuracy of the analysis.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2018.2790800