Microgrid is a small-to-medium-scale decentralized independent system. It is a self-generating and power supply system that can realize self-control, protection and management. It can be connected to the grid or run independently. It is a small-to-medium-scale power generation and power supply system that integrates hydropower generation, photovoltaic power generation and wind power generation, energy storage, energy conversion devices, related loads and monitoring and protection devices.