Analysis on the organization and Development of multi-microgrids

With the microgrids large-scale interconnect to the power grid, a number of neighboring microgrids in a certain region will form a multi-microgrids (MMGs) system. In the development from microgrid to smart grid, the MMGs will be a new research hotspot after microgrid. The paper analyses the basic structure of the MMGs from many aspects such as voltage grade classification, AC/DC constitutional forms, and phase-sequence constitutional forms. Next the remote-area type, residential-area type, office-building type, industrial-park type and research-study type MMGs are analyzed according to the typical application scenarios. Lastly, based on the research of the four aspects of the planning and design, mode switching, optimal operation and control devices, the key technology of the MMGs is discussed and explored.