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      • Study on Micro-Grid Power Storage Converter

        Yang Gao,Aoran Xu,Gang Wang,Di Bai,Yi Zhao 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.3

        In the micro-grid, power storage converter is played as a interface between the battery pack and grid electricity storage device, to achieve a two-way exchange of energy. In this paper, the research and development of power storage converter can realize multiple sets of independent control of the battery, flexible configuration of the system capacity and flexible cutting of the battery pack. Structural design uses multi-level topology. It contains 15 non-isolated half-bridge parallel bi-directional DC / DC converter. Control strategy designed to be grid inverter adopts SVPWM control technology. DC / DC converter designed to improve the droop control strategy based on environmental design. The high-power energy storage converter product this paper designed have completed the charge and discharge related droop control and Full power grid experiment. The charge and discharge currents accurately track the current instruction and the grid efficiently is more than 95%. It verified the rationality and effectiveness of the design and is the important part of the optical storage and solar power generation systems.

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