Discussion on application of super capacitor energy storage system in microgrid

With the development of renewable energy power generation, microgrid, which integrates distributed generations, is considered progressive to effectively meet the growing power demand, economize the investment and improve energy efficiency. As a necessary energy buffer, energy storage system plays an increasingly important role. Super capacitor, as a new energy storage device, becomes one of the best choices for microgrid because of its irreplaceable advantages. Energy storage system based on super capacitors, can not only be energy buffer, but also improve the power quality of microgrid, balance micro-sources' output, and plays an important role on the economic performance of microgrid. This paper summarizes the characteristics and performance of super capacitors, analyzes the structure and principles of the super capacitor energy storage system, and outlines its applications to microgrid.