Characteristics and Key Technologies of User-Side Microgrid

The characteristics,basic topologies and facing challenges of user-side microgrids( USMG) are introduced in this paper.Then the key technologies are put forward and discussed,including economic and operation mode evaluation,optimal planning methods,bi-directional metering and monitoring technology,control and protection,optimal power flow,energy management scheme,and research and development of the key devices. With these key technologies,the commerical foundation of USMG operation will be solided; the stability,power supply quality and customer service of USMG will be enhanced; and the large scale development and intergration of USMG will be possible.