I. Introduction of energy Internet and smart grid
1. Briefly describe the energy Internet and its basic architecture.
Energy Internet can be understood as a comprehensive use of advanced power electronics technology, information technology and intelligent management technology, a large number of distributed energy acquisition devices, distributed energy storage devices and various types of load composed of new power network, oil network, natural gas network and other energy nodes connected. In order to realize the energy two-way flow of energy exchange and sharing network.
The so-called energy Internet, in simple terms, is similar to information Internet, all energy information (distributed generation, supply and consumption), can be interconnected through the network, get timely feedback, and according to the demand to choose control.
Energy on the Internet is based on electric power network, the use of renewable energy technology, smart grid technology and Internet technology, fusion network, natural gas network, hydrogen power network energy grid and the electrification of transportation network, formed a variety of energy efficient utilization and multivariate main body involved in energy sharing network, given the high penetration of renewable clean energy, And activate new business models.
Energy Internet is the combination of Internet technology, renewable energy technology and modern power system. It is the inevitable trend of the integration of information technology and energy and power technology. Therefore, if the power system network is reconstructed based on the principles of openness, interconnection, reciprocity and sharing, the safety of the power grid and the efficiency of power production can be improved, and the information sharing in the energy Internet can be as convenient as the Internet.
Energy Internet is the power system as the core, based on smart grid, mainly access to distributed renewable energy, using advanced information and communication technology and power electronics technology, through distributed Intelligent EMS (IEMS) to implement wide-area coordination control of distributed energy equipment. The smart energy system will realize the complementing of cold, heat, gas, water, electricity and other energy sources to improve energy efficiency.
2. Smart grid includes AMI, ADO, ATO and AAM, and describes the role and significance of each part.
3. Describe the application of flexible AC power transmission technology in smart power grid.
4. Describe the main content of advanced distribution automation.
ADA includes advanced distribution operation automation and advanced distribution management automation. Advanced DOA implements real-time application functions such as distribution network security monitoring and data collection, feeder automation, voltage reactive power control and DER scheduling. Advanced DMA implements the recording, editing, query and statistical management of distribution equipment spatial and attribute data and network topology data based on geographic graphics. On this basis, advanced DMA to complete power outage management, maintenance management, job management, mobile terminal (repair car) management and other offline or real-time requirements of the application function is not high. ADA - A revolution, not just an extension of traditional distribution automation will use new technologies in power electronics, information technology, distributed computing and simulation ADA can provide new services to users.
5. The construction of smart grid needs the support of policy and technology, and expounds the opportunities, challenges and coping strategies faced by the development of smart grid in China based on their respective understandings.
China has a vast territory. The coastal areas are economically developed and load intensive but energy scarce, while the inland areas are rich in energy but economically underdeveloped. Therefore, China must establish a smart grid with highly coordinated development of all levels of power grids with ultra-high voltage network as the backbone. National 973 plan project "basic research" to enhance the reliability of large-scale interconnected power grid operation for smart grids and dynamic scheduling and control provides a basic analysis tool, renewable energy generation such as wind power, photovoltaic power generation is also booming, some domestic areas are ready to start planning and construction of digital substation, senior dispatching center, All these have laid a solid foundation for the construction of a strong smart grid in China.
Ii. Challenges faced by smart grid
1. Industrial technological competition pressure
As early as this century, European and American countries have entered the final stage of technological upgrading of power system, among which the United States has shifted its attention to the integration of smart grid and electronic monitoring as early as the end of last century, while actively utilizing new energy resources, vigorously developing wind, solar, geothermal energy and other emerging energy.
2. The gap between equipment coordination and adaptability
Although China has widely absorbed the world's power system technology experience, its power system infrastructure is still in the original stage, the update of technology does not fully drive the timely update of infrastructure, so there is still a long-term gap in the coordination of equipment and technology.
3. Adapting to the overall technological development trend of the society
In the modern sense of the smart grid refers to the electronic control of power system by computer, the traditional source of electric power system control is mainly composed of mechanical and electrical, popularization and development of smart grid in China, there is no doubt that faced with traditional control in terms of the source, and even traditional mechanical and electrical control source to give way to modern computer control system, It is a challenge to the development of China's power grid.
3. Corresponding solutions
1. Improve the reliability of power communication platform
In modern smart power grid, communication platform is not only a communication channel, but also an indispensable part of smart power grid to realize the function of link and ensure the smooth implementation of business.
2. Strengthen information and communication support networks
The power system in the information society cannot escape the strengthening of information transmission and communication function, especially when the power distribution function has problems, timely information communication can ensure that the control source of the power grid can grasp the specific situation of every detail of the power grid in time.
3. Focus on technical professionalism improvement
At the present stage, smart grid has rigid requirements for the prevailing communication network, requiring the overall system of smart grid to reach the advanced technical level, so as to improve the overall power network technology from the height of the industry and provide an energy network guarantee for the development and progress of modern economy and society.
Wuhan Xinshengneng is a professional power testing equipment manufacturer. We pay close attention to the development and trends of power grid related industries. For more information, visit our official website: www.whxsn.com
