Research and application of interactive technology between microgrid and distribution grid

Based on 330kWp Yinchuan solar power station, the overall framework of interactive microgrid was firstly de signed. Then subsystems including microgird monitoring system and energy storage system were constructed. According to our interactive microgrid system, the output and operation mode of the photovoltaic and energy storage system can be adjusted through the energy management system to smooth the output curve of photovoltaic and supply power for station load at off-grid status. The wireless communication based on GPRS is used between interactive devices (including isolation devices) and the Ningxia electric power company. Finally, through constructing and upgrading necessary facilities, the microgird demonstration project was built, which provided a good platform for the study of microgrid and the practice interactive test with distribution grid. The renewable energy and loads can be integrated as much as possible into the platform. Meanwhile, the platform shows excellent energy-saving characteristics due to the use of electric load, which greatly reduce the energy losses in the testing process.