Single-phase transformerless bi-directional inverter with high efficiency and low leakage current
SCIE
SCOPUS
- Title
- Single-phase transformerless bi-directional inverter with high efficiency and low leakage current
- Authors
- Lee, SH; Kim, KT; Kwon, JM; Kwon, BH
- Date Issued
- 2014-02
- Publisher
- IET
- Abstract
- This study proposes a high efficient bi-directional inverter for a photovoltaic (PV) system integrated with an energy storage system. The proposed bi-directional inverter controls the bi-directional power flow and satisfies the power requirement between the grid and the dc sources. The proposed bi-directional inverter achieves high efficiency by employing a transformerless structure and by minimising the power losses. The inverter structure can suppress the leakage current, which is considered to be one of the most important design parameters in a transformerless PV system. The efficiency and leakage current of the proposed bi-directional inverter are analysed. Furthermore, its bi-directional operation principles and control method are described. Finally, a 3-kW prototype is implemented to confirm the theoretical analysis and the validity of the proposed bi-directional inverter.
- Keywords
- SYSTEMS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14825
- DOI
- 10.1049/IET-PEL.2013.0074
- ISSN
- 1755-4535
- Article Type
- Article
- Citation
- IET Power Electronics, vol. 7, no. 2, page. 451 - 458, 2014-02
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