Design and realisation of a new multifunctional low-cost experimental microgrid

In recent years, microgrid technology has been rapidly developed, and the traditional large-scale microgrid system is not conducive to teaching in microgrid laboratories in colleges and universities due to the characteristics of high voltage, large capacity, and many equipments. Laboratory microgrids are mainly small systems composed of distributed power sources, energy conversion devices, loads, and monitoring and protection devices, which can simulate various working conditions of microgrids in off-grid and grid-connected operation states in the laboratory. This paper mainly describes the current research status of laboratory microgrid, and designs the topology, specific functions and equipment protection of laboratory microgrid, and analyzes the simulation and experimental effect of laboratory microgrid.