Smart grid is the intelligence of power grid, also known as "grid 2.0". It is built on the basis of integrated, high-speed two-way communication network. Through the application of advanced sensing and measurement technology, advanced equipment technology, advanced control method and advanced decision support system technology, To achieve the goal of reliable, safe, economical, efficient, environmentally friendly and safe operation of the power grid, its main characteristics include self-healing, motivating and protecting users, resisting attacks, providing power quality that meets the needs of users, allowing access to various forms of power generation, starting the power market and optimizing the efficient operation of assets.
Compared with existing power grids, smart grids reflect the remarkable characteristics of highly integrated power flow, information flow and business flow. Its advancement and advantages are mainly manifested in:
(1) With a strong grid infrastructure and technical support system, it can resist all kinds of external interference and attacks, and can adapt to the access of large-scale clean energy and renewable energy. The robustness of the grid has been consolidated and improved.
(2) The organic integration of information technology, sensor technology, automatic control technology and power grid infrastructure can obtain panoramic information of the power grid, and detect and predict possible failures in time. When a fault occurs, the power grid can quickly isolate the fault and realize self-recovery, thereby avoiding large-scale power outages.
(3) The wide application of technologies such as flexible AC/DC transmission, grid coordination, intelligent dispatching, power storage, and distribution automation makes the grid operation control more flexible and economical, and can adapt to a large number of distributed power sources, microgrids and electric Access to car charging and discharging facilities.
(4) The comprehensive application of communication, information and modern management technology will greatly improve the efficiency of power equipment, reduce power consumption, and make the grid operation more economical and efficient.
(5) Realize the high integration, sharing and utilization of real-time and non-real-time information, display a comprehensive, complete and detailed grid operation state diagram for operation management, and provide corresponding auxiliary decision support, control implementation plans and response plans.
(6) Establish a two-way interactive service mode. Users can understand the power supply capacity, power quality, electricity price status and power outage information in real time, and rationally arrange the use of electrical appliances; power companies can obtain users' detailed electricity consumption information and provide them with more value-added services .
