Micro-Grid, also translated as microgrid, is a new type of network structure, which is a system unit composed of a group of micro-power sources, loads, energy storage systems and control devices. A microgrid is an autonomous system capable of achieving self-control, protection and management. It can operate either in parallel with the external power grid or in isolation. Microgrid is a concept in contrast to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads in a certain topological structure and connected to the conventional power grid through static switches. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy, achieve highly reliable supply of various energy forms to loads, is an effective way to realize active distribution networks, and represents the transition from traditional power grids to smart grids.
smart power grids, which is the intelligence of the power grid and is also known as "Power Grid 2.0", is based on an integrated, high-speed two-way communication network. Through the application of advanced sensing and measurement technologies, advanced equipment technologies, advanced control methods, and advanced decision support system technologies, To achieve the goals of reliable, safe, economical, efficient, environmentally friendly and safe use of the power grid, its main features include self-healing, incentives and inclusion of users, resistance to attacks, providing power quality that meets the needs of 21st-century users, allowing the access of various forms of power generation, initiating the power market and optimizing and operating assets efficiently.
Both are new concepts in the field of power systems. All of these are related to the large-scale application of new energy technologies. Because traditional power grids cannot consume a large amount of new energy power such as photovoltaic, solar thermal and wind power, the above technologies, especially the former, have been proposed. The smart grid was first proposed by the United States, and it was a scam by some congressmen with backgrounds in the information technology industry.