The smart grid is a hot spot for the development of new technologies and new industries at home and abroad. The State Grid Corporation is building a nationally unified and strong smart grid. Its basic feature is that the operation of the power system is realized, automated, interactive and market-oriented, realizing the efficient use of electric energy.
According to the smart grid research framework system, the smart grid construction mainly captures six links of power generation, transmission, substation, power distribution, power consumption and dispatch. The distribution of electricity is the user side of the power grid. There are three main categories according to user attributes: building buildings, such as hotels, shopping malls, stadiums, schools, office buildings, government agencies, etc.; industrial and mining enterprises, such as metallurgy, papermaking, textile, machinery , electronics, coal mines, etc.; infrastructure, such as airports, ports, railways, highways, water conservancy, etc. The user end consumes 80% of the power of the entire power grid, and intelligently constructs the user terminal of the power grid, which is of great significance to users' reliability, safety, and energy conservation. The construction of the user-side link mainly includes: building a smart power service system; comprehensively promoting the application of intelligent devices such as smart meters and intelligent power management terminals; realizing two-way interaction between the power grid and users, improving user service quality; building intelligent power cells and electric Car charging station. The research contents urgently needed by the user include: advanced metering, intelligent building, smart appliances, value-added services, customer power systems, and demand side management.
The smart grid is a hot spot for the development of new technologies and new industries at home and abroad. The State Grid Corporation is building a nationally unified and strong smart grid. Its basic feature is that the operation of the power system is realized, automated, interactive and market-oriented, realizing the efficient use of electric energy.
Energy Management System Architecture and Goals
The smart grid client discusses the intelligence and informationization of the power distribution and power system from the user side. The scope refers to the power company's billing meter outlet below, from the power transformer to the power equipment, the power transmission and distribution. All equipment and systems for control, protection, and energy management.
With the development of science and technology and the improvement of people's material living standards, more and more electrical equipment such as elevators, pumps, lighting, air conditioning systems, household appliances, etc., the rapid increase in power load, the energy efficiency of equipment and the relationship between different equipment The matching needs scientific management, and the energy management of the client is therefore receiving more and more attention.
The general smart grid customer energy management system mainly includes three aspects: computer management system, communication network, and sensing (metering) components. The sensing (metering) component collects various power data and transmits it to the computer management system through the communication network. The management system will distribute the collected data summary, analysis, report, etc., and when the fault condition occurs, the early warning, alarm and even according to the preset conditions are performed. Automate certain operational functions. The advanced management system also includes intelligent control devices that automatically detect various conditions of the power grid and electrical equipment and automatically control the relevant loads, including control of energy storage equipment and renewable energy equipment.
Building a smart grid customer-side energy management system has three goals:
1) Power monitoring and energy-saving optimization: real-time detection and measurement, data collection, summary analysis, vertical and horizontal comparison, etc. of all aspects of the power system, especially the energy consumption of key energy-consuming equipment, and discovering the unreasonable use of electric energy through manual intervention or The method of automatic control is improved, the energy-using equipment is optimized, and the use efficiency of electric energy is improved.
2) Interaction between the client and the grid company management system: In the smart grid, the grid company requires that some devices on the user side can respond to the load rate of the power grid, and its use can avoid the peak of power consumption and the valley of power consumption. When used, help the grid to cut peaks and fill the valley.
3) Manage access to distributed energy equipment: access to the grid by customer-side energy storage equipment, electric vehicles and renewable energy equipment may have a major impact on the grid. These devices may also transfer electricity to the grid, so a good The energy management system is managed.