| Title |
Grid-tied Power Conditioning System for Battery Energy Storage Composed of 2-stage DC-DC converter |
| Authors |
박아련(Park, Ah-Ryeon) ; 김도현(Kim, Do-Hyun) ; 김경태(Kim, Kyeong-Tae) ; 한병문(Han, Byung-Moon) ; 이준영(Lee, Jun-Young) |
| DOI |
https://doi.org/10.5370/KIEE.2012.61.12.1848 |
| Keywords |
2-stage DC-DC converter ; LLC resonant converter ; 2-quadrant hybrid-switching chopper ; Power conditioning system ; Battery energy storage ; PLL(Phase-Locked Loop) |
| 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. |