Abstract: Aiming at the problems of regional large-scale photovoltaic construction and access，as well as the

lack of control of existing distributed energy，the construction and operation control method of microgrid group

were put forward，which extracted a three-level and two-stage coordination and interaction system supported by

regional level core area，coordination control unit and multi-type microgrid，and the relevant key technologies were applied and studied. Combined with the actual situation of a certain urban area in Beijing，the actual system

construction was carried out，and the construction of the energy management system of the microgrid group was

completed. The division of coordination control units，the cluster scheduling of distributed energy，the analysis of

microgrid characteristics，the mutual aid between microgrids and other issues were explored，which effectively

improved the elastic space of the active distribution network，and increased the power grid scheduling's ability to

control distributed energy.

      Key words: distributed energy；microgrid；coordination control unit；active distribution network；energy

management system