Journal
ENERGIES
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/en11102746
Keywords
DC-AC; dual active bridge; integrated buck; boost stage; power decoupling; series resonant converter
Categories
Funding
- National Natural Science Foundation of China [51707124, 51477104]
- Department of Education of Guangdong Province [2016KQNCX148]
- Natural Science Foundation of Guangdong Province [2016A030313041]
- Shenzhen Science and Technology Research Foundation for Basic Project [JCYJ20170302153607971]
- Shenzhen Peacock Program [827-000237]
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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.
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