From the concept of "CCCP" put forward by Academician Gao Jingde, former president of Tsinghua University in 1980s (modern power system is the deep integration of computer, communication, control and power system and power electronics technology) to the three frontier topics of modern power system put forward by Academician Han Yingduo in 1990s (flexible transmission technology, intelligent control and dynamic security analysis and monitoring system based on GPS), and then to the smart grid emphasizing the combination of information flow and energy flow and the close integration of information technology and modern power grid in recent years.
Judging from some recent development trends, the National Energy Administration, China Academy of Sciences and China Academy of Engineering all have related activities, and the National Foundation and Beijing Municipal Science and Technology Commission have also carried out related projects. Tsinghua University also established the Energy Internet Innovation Research Institute, and put forward the concept of infrastructure: one is centralized and unified, and the other is decentralized and collaborative. Traditional infrastructure is used whenever it is used, regardless of where the source is, but now in the field of information technology, cloud computing, information sharing is the integration of source and consumption. The energy bottleneck encountered by information technology makes IT companies begin to pay attention to the problems in the energy field, IBM also begins to provide new energy solutions, and smart grid also pays attention to how to apply information technology to the energy and power industry. It is to let information and communication collide with energy and power technology, resulting in the energy Internet. Energy Internet infrastructure, through interconnection mechanism, can coordinate these flexible ways between microgrid and large power grid.
Thinking and Understanding of Energy Internet
For the energy Internet, our understanding is as follows: First, there are many forms of energy, and electric energy is only one kind of energy, but electric energy has incomparable advantages in energy transmission efficiency, and power grid is the main factor when considering interconnection issues; Second, the energy Internet adopts a decentralized autonomous collaborative management model from the bottom up, which complements the current centralized large power grid model and conforms to the general trend of combining centralized and distributed power grid development; Third, the current smart grid is basically information and intelligence under the existing grid structure. Energy Internet is a new type of power grid based on the concept of Internet, and its characteristics of open interconnection, energy exchange and routing are different from the current general smart grid. To sum up, the essential characteristics of the energy Internet are: openness, interconnection, equivalence and sharing. From the perspective of information technology, it is common, but if energy content is given, we can see that how to realize energy exchange and sharing is still challenging on the technical level.
Three Understanding of Energy Internet
From the development of foreign countries, there are three kinds of understandings about the energy Internet: First, a new energy network is formed under the guidance of the concept and architecture of openness and equivalence of the Internet. At this time, the essence of the energy Internet is the energy network! Taking FREEDM in America as a typical representative and imitating the core router of network technology, the concept of energy router is put forward and the prototype is realized. The second is to collect energy-related information with the help of the Internet, and guide the operation and scheduling of energy networks after analyzing and making decisions. At this time, the essence of the energy Internet is the information Internet! Taking e-Energy in Europe as a typical representative, an energy supply system based on information and communication technology is constructed, which connects all business processes in the energy supply chain, realizes demonstration application and forms the interaction between energy demand and supply; Third, the above two kinds of understanding are mixed together, and there are both components, with digital power grid and power router in Japan as typical representatives.
What is the concept we put forward? At the infrastructure level, the energy Internet is a comprehensive framework of information and energy infrastructure. In the future, the infrastructure composed of cloud computing, data center and Internet of Things will exchange energy in a peer-to-peer way, forming an integrated scene of information and energy infrastructure, including energy routers and data centers, which will not only solve the energy supply problem, but also solve the support problem of information technology and communication technology in energy infrastructure.
Three stages of information communication/energy development
To sum up, the development of information communication/energy power is divided into three stages: the first stage is digitalization and informatization, and information communication provides services for the energy power industry, bringing convenience and speed; The second stage is intelligent stage, that is, smart grid stage. Information communication has become an indispensable part of energy and power infrastructure, which is characterized by the combination of information flow and energy flow. The third stage is the integration of information physics, that is, the energy Internet stage, the integration of information and communication infrastructure and energy and power infrastructure.
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