Present Situation of Research on Microgrid and the Necessity of Developing DC Microgrid

摘要

As the most efficient way of connecting distributed generations which are mainly based on renewable resources to the power grid, the microgrid has been in fast development in recent years. The paper is based on the summary of the present situation of research on microgrid all over the world and the key technology urgently to be solved, and then the advantage and the necessity of developing DC microgrid is analysed in terms of components as well as operation and control of microgrid. At last, an AC/DC hybrid microgrid structure is proposed according to the present circumstances in the distribution network.