Device for detecting generation of island in micro power grid system

The utility model discloses a device for detecting generation of an island in a micro power grid system, which comprises a micro power grid control system and a grid connected and isolated controller, wherein the grid connected and isolated controller comprises a protective control unit, an analog quantity collection module, a state quantity information collection module, a trip signal output module and a power supply, wherein signal output ends of the analog quantity collection module and the state quantity information collection module are connected with a signal input end of the protective control unit which is connected with the micro power grid control system or an energy storage device through a trip output module, and the grid connected and isolated controller is communicated with the micro power grid control system or the energy storage device through a communication management module. The device can detect voltage, current and switch state quantity information of a micro power grid through the grid connected and isolated controller, so as to judge whether the island exists, so that the problem of detecting the island in the micro power grid is solved, the conversion between grid connection and grid isolation is provided with a base, and the micro power grid is promoted to application and popularization.