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

Jiatu Hong, Mahinda Vilathgamuwa, Jian Yin, Yitao Liu, Jianchun Peng and Hui Jiang
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Jiatu Hong: College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
Mahinda Vilathgamuwa: Department of Electrical Engineering and Computer Science, Queensland University of Technology, Brisbane 4001, Australia
Jian Yin: College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
Yitao Liu: College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
Jianchun Peng: College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China
Hui Jiang: College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

Energies, 2018, vol. 11, issue 10, 1-16

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.

Keywords: DC-AC; dual active bridge; integrated buck/boost stage; power decoupling; series resonant converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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