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http://dx.doi.org/10.5370/KIEE.2012.61.12.1848

Grid-tied Power Conditioning System for Battery Energy Storage Composed of 2-stage DC-DC converter  

Park, Ah-Ryeon (Dept. of Electrical Engineering, Myongji University)
Kim, Do-Hyun (Dept. of Electrical Engineering, Myongji University)
Kim, Kyeong-Tae (Dept. of Electrical Engineering, Myongji University)
Han, Byung-Moon (Dept. of Electrical Engineering, Myongji University)
Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.61, no.12, 2012 , pp. 1848-1856 More about this Journal
Abstract
This paper proposes a new grid-tied power conditioning system for battery energy storage, which is composed of a 2-stage DC-DC converter and a PWM inverter. The 2-stage DC-DC converter is composed of an LLC resonant converter connected in cascade with a 2-quadrant hybrid-switching chopper. The LLC resonant converter operates in constant duty ratio, while the 2-quadrant hybrid-switching chopper operates in variable duty ratio for voltage regulation. The operation of proposed system was verified through theoretical analysis and computer simulations. Based on computer simulations, a hardware prototype was built and tested to confirm the technical feasibility of proposed system. The proposed system could have relatively higher efficiency and smaller size than the existing system.
Keywords
2-stage DC-DC converter; LLC resonant converter; 2-quadrant hybrid-switching chopper; Power conditioning system; Battery energy storage; PLL(Phase-Locked Loop);
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