The main characteristics of the smart grid are robustness (informatization, automation, and interaction as the three basic technical characteristics), self-healing, compatibility, economy, and integration and optimization. It is to achieve two-way transmission of power and information to establish an automated, Wide-area distributed energy transmission network; it concentrates the advantages of distributed computing and communication, transmits real-time information, and enables power to achieve a real-time balance of supply and demand on each device. Informatization uses digital methods to realize the collection and transmission of information. Automation improves the level of power grid operation control and management. Interaction enables the whole system to interact and efficiently coordinate through real-time communication and analysis of information.
(1) Be strong. In the event of large disturbances and failures in the power grid, it can still maintain the ability to supply power to users without large-scale blackouts; it can still deploy the power grid to operate safely under natural disasters, extreme weather conditions or external damage; it has the ability to ensure the safety of power information .
(2) Self-healing, with real-time, online and continuous safety assessment and analysis capabilities, strong early warning and preventive control capabilities, and automatic fault diagnosis, fault isolation and system self-recovery capabilities.
(3) Compatible. Support the orderly and reasonable access of renewable energy, adapt to the access of distributed power sources and microgrids, enable interaction and efficient interaction with users, meet users’ diversified power needs and provide users with value-added services.
(1) Economy. Support the effective development of power market operators and power transactions, realize priority allocation of resources, reduce power grid losses, and improve energy efficiency.
(5) Integration. Achieve a high degree of integration and sharing of power grid information, and adopt a unified platform and model to achieve standardization, standardization and lean management.
(6) Optimization. Optimize the utilization of assets, reduce investment costs and operation and maintenance costs.
The connotation of a strong smart grid includes five aspects: strong and reliable, cost-effective, clean and environmentally friendly, transparent and open, and friendly and interactive. Including the six links of power generation, transmission, transformation, distribution, power consumption, and dispatching, as well as the communication information platform supporting each link, it is a highly complex system engineering.
(1) Strong and reliable refers to the strong grid structure, strong power transmission capacity and safe and reliable power supply.
(2) Cost-effective means to improve grid operation and transmission efficiency, reduce operating costs, and promote the efficient use of energy resources and power resources.
(3) Clean and environmental protection refers to promoting the development and utilization of renewable energy, reducing energy consumption and pollutant emissions, and increasing the proportion of clean electricity in the final energy consumption.
(4) Transparent and openness refers to the transparent sharing of information between power grids, power sources and users, as well as the non-discriminatory opening of the power grid.
(5) Friendly interaction refers to the realization of flexible adjustments to the operation mode of the power grid; it is friendly and compatible with various power sources and user access and exit, and promotes power generation enterprises and users to actively participate in the adjustment of power grid operation.