Research on Super-Capacitor and Battery Hybrid Energy Storage System Applied in Micro-grid

As both of micro-sources and load are fluctuate and random in micro-grid, energy storage device is the key part to maintain micro-grid operation safely and reliably, also to improve power quality. This paper first analyses that hybrid energy storage system composed of super-capacitors and batteries is suitable to maintain micro-grid operation safely. In addition, current demos of hybrid energy storage system applied in micro-grid at home and abroad are concluded. Then it analyses and compares several suitable structures as well as charging and discharging circuits. At last, this article proposes to adopt F28M35 for central control chip to control hybrid storage system.