Design on a micro-grid system without inverse-power-flow based on distributed generation

Recent years, traditional radiate passive power distribution will become an active power with many medium or small power sources and loads, when distributed generation by new energy (such as wind power or photovoltaic power) are connected to power grid more and more. This change of power distribution brings large harm to security of power grid. This paper proposed a micro-grid system without inverse-power-flow based on distributed generation, which center controller and load controller are deployed, and distribution powers, loads and load controllers are partitioned into different domains connected to micro-grid by controllable switch. The function of main units of micro-grid is discussed; as well as the operation strategy of micro grid based on distributed generation is studied. Finally, the experiment results show the feasibility of the proposed micro-grid system.