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Energies 2018, 11(10), 2746; https://doi.org/10.3390/en11102746

Power Decoupling of a Single Phase DC-AC Dual Active Bridge Converter Based on an Integrated Bidirectional Buck/Boost Stage

1
College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
2
Department of Electrical Engineering and Computer Science, Queensland University of Technology, Brisbane 4001, Australia
3
College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Received: 5 September 2018 / Revised: 22 September 2018 / Accepted: 10 October 2018 / Published: 13 October 2018
(This article belongs to the Special Issue Power Electronics for Energy Storage)
Full-Text   |   PDF [9436 KB, uploaded 13 October 2018]   |  

Abstract

In single phase DC-AC systems, double-line-frequency power ripple appears at the DC side inherently. Normally a large electrolytic capacitor can be used to reduce the power ripple at the DC side. But there are several problems with this method as it decreases the power density and reliability of the converter. In addition, a double-line-frequency current ripple appears in case a voltage source serves at the DC side, which is undesired in specific applications. This paper proposes a single phase DC-AC DAB (dual active bridge) converter with an integrated buck/boost stage for power decoupling purpose under low power condition. The proposed active power decoupling method is able to completely eliminate the double-line-frequency power ripple at the DC side. Therefore, a constant DC current can be obtained for requirements in specific DC-AC applications. View Full-Text
Keywords: DC-AC; dual active bridge; integrated buck/boost stage; power decoupling; series resonant converter DC-AC; dual active bridge; integrated buck/boost stage; power decoupling; series resonant converter
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Hong, J.; Vilathgamuwa, M.; Yin, J.; Liu, Y.; Peng, J.; Jiang, H. Power Decoupling of a Single Phase DC-AC Dual Active Bridge Converter Based on an Integrated Bidirectional Buck/Boost Stage. Energies 2018, 11, 2746.

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