A Three-Phase Isolated Bidirectional AC/DC Converter and its Modified SVPWM Algorithm

This paper proposes a three-phase isolated bidirectional ac/dc converter. The converter achieves buck-boost ac/dc bidirectional conversion, sinusoidal ac current, and high-frequency electrical isolation with single-stage structure. The traditional SVPWM algorithm should be modified to keep the volta...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2015-10, Vol.30 (10), p.5458-5468
Main Authors: Gu, Ling, Jin, Ke
Format: Article
Language:English
Subjects:
Algorithms
bidirectional AC/DC converter
DC microgrid
Electric currents
Integrated circuits
Inverters
Periodic structures
Power supply
Reactive power
Rectifiers
Simulation
Space vector pulse width modulation
SVPWM
Switches
three-phase inverter
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Description
Summary:This paper proposes a three-phase isolated bidirectional ac/dc converter. The converter achieves buck-boost ac/dc bidirectional conversion, sinusoidal ac current, and high-frequency electrical isolation with single-stage structure. The traditional SVPWM algorithm should be modified to keep the voltage-second balance of the transformer. The circuit derivation, operation principles, and SVPWM algorithm are presented specifically. The solution for shoot-through problem is proposed, which does not need extra dead time. To verify the theoretical analysis, the proposed converter was simulated by MATLAB/SIMULINK and a 3 kW prototype was built in the lab. The simulation and experimental results show the high power factor and the low harmonic distortion characteristics of the circuit.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2014.2378274