Construction Of Energy Internet Research Articles

The Framework of Urban Energy Map and Case Study

Urban energy map is an energy solution that combines map elements and energy elements, including information of energy exploration and production, processing and transformation, transmission and distribution, consumption and other links, and is an important part of the construction of energy Internet. This paper proposes the overall framework and basic functions of urban energy map, which include three parts: data layer, technology layer and interaction layer. Taking geographic information system (GIS) as the spatial support technology, and based on the industrial enterprise energy data collected by Spatiotemporal database of China energy flow and carbon emission (SDCEC) and other relevant data from Suzhou Smart Energy Management Platform, the energy map of Suzhou New District is drawn and its characteristics are analysed. The research shows that the urban energy map can effectively reflect the spatial concentration, pattern change, and ranking of urban energy consumption.

Research on Implementation Methods of Power Grid Technology Supporting Energy Internet Construction

The energy Internet is a complex multi-grid flow system, which is based on the power system, the Internet and other cutting-edge information technologies, with distributed renewable energy as the main primary energy and closely coupled with natural gas network, transportation network and other systems. The power grid technology has to develop to support the energy Internet construction. This paper discusses the changes and challenges in the asset environment, asset types, asset scope and asset risk under the energy Internet. Then the corresponding implementation methods of power grid technology to supporting energy Internet construction are put forward. The research results can provide reference for power grid companies to implement power technical innovation.

Research on Energy Internet Power Line Communication Technology Based on Block Chain

With the continuous development of energy Internet technology, its requirements for communication systems are getting higher and higher. As for the energy Internet, it is based on the concept of the Internet and the existing smart grid. Its communication system also needs to rely on the existing power communication system. In the energy Internet, the use of block chain and intelligent contract technology to meet credible and automatic point-to-point energy transactions can improve the overall operating efficiency of the system, reduce management costs, and make the energy Internet a self-organizing and self-regulating structure. In essence, energy Internet and block chain technology must be built on the Internet of Things, a common intelligent device. This paper takes the power line communication technology of the Internet in the current power system as the research object, analyzes the main challenges and problems in the construction of energy Internet based on blockchain, and then provides the corresponding research basis for the future heterogeneous network integration.

The design of multi-energy market trading systems considers the wholesale and retail markets

With the development of energy internet construction, the transactions of multi-energy sources in the energy trading market are getting closer and closer. In a single energy market transaction, each energy market only considers the transaction situation of this market, which brings potential losses to energy efficiency. It is urgent to study a market trading system of multi-energy coupling. First of all, this article sorts out the current status of the transaction development of domestic and foreign natural gas, electricity and heat markets. Then, it looks forward to the market trading model of multi-energy sources. Finally, we propose a multi-energy trading system considering the wholesale and retail markets. The energy trading system constructed in this paper can provide a direction for the development of a variety of energy trading in China.

Study on Sustainable Development of the Transnational Power Grid Interconnection Projects under Diversified Risks Based on Variable Weight Theory and Bayesian Network

Transnational power grid interconnection is an important measure to promote the construction of energy Internet. It can meet the global power demand in a clean and green way, promote the UN’s concept of “sustainable energy,” and tackle climate changes. But, transnational power grid projects face many complex and variable risks due to their complex background and lacking experience. According to the characteristics of transnational power grid interconnection projects, a risk assessment index system including 10 indexes such as national relation, public participation, and available transmission capacity is constructed. Then, in order to overcome the shortcomings of traditional risk assessment methods, this paper proposes a risk assessment method combined with risk theory and probabilistic model, which can not only consider the uncertainties but also integrate the probability of accidents with consequences. Therefore, it can effectively assess the transnational power grid interconnection projects under diversified risks. In addition, in order to further magnify the impact of higher risks on such projects, a method combining traditional weighting method with the variable weight theory is proposed. The study in this paper provides certain guidance and decision-making support for different participants such as the government power sector, construction enterprises, and investment enterprises when they launch on sustainable development of the transnational project business, which have obvious practical significance.

Domestic and Foreign Energy Internet Construction Experience and Enlightenment

In this paper, firstly the overall energy structure and energy power development route of major developed countries are analyzed, and practice situations of energy internet engineering of different countries are analyzed by taking the United States, Germany and Japan as an example. Secondly, the overview, technical scheme and comprehensive benefits of typical domestic energy internet projects are analyzed. Finally, experience is summarized and suggestions are put forward for China’s regional energy internet construction in terms of key technologies, operation model and pilot construction.

Regional Energy Internet Construction Framework and Key Tasks

Based on the strategic needs of the State Grid Corporation of China in building regional energy Internet, this paper carries out study from the following points: first, analyzing the connotation and characteristics of regional energy Internet; second, building the “three systems” structure of regional energy Interest construction; last, defining the key tasks of regional energy Internet construction from three aspects: infrastructure, technological innovation and market mechanism.

Research on Comprehensive Evaluation of Micro Energy Internet Based on Synergetic

Energy Internet is a product of the high integration of traditional energy system and Internet, which may break the existing energy landscape. The existing energy Internet assessment methods are lack of integrity and fail to fully reflect the core mechanisms and requirements of energy Internet. At the same time, the subjectivity of weight calculation is strong, which is easily influenced by human factors. Proceeding from the requirements of overall evaluation and focusing on the energy interconnection and complementary of micro energy Internet, this paper proposes a comprehensive evaluation indicator system of energy Internet based on the theory of Synergetics. The first-level indicator, which is the macro-performance of energy Internet, is put forward on the basis of the reference to traditional indicators and the energy interactive-collaborative in Synergetics. Secondary indicator is the subdivision of first-level indicator and represents the micro-elements that the first-level indicator fails to reflect. At the same time, the weight of each index is calculated by the principle of information entropy. Finally, Evaluation of Micro Energy Internet has guiding significance for the future construction of energy Internet.

Chinese Energy Internet Construction Promotes Development of Distributed Renewable Energy Mini Grid

Distributed renewable energy Mini grid is a novel power grid architecture which consists of micro power, load, energy storage devices and control devices. In this paper, status quo and existing problems of distributed renewable energy Mini grid in China are analyzed, and then research contents and key technologies are introduced, a typical distributed renewable energy Mini grid demonstration project is introduced finally. Distributed renewable energy Mini grid will fundamentally change response of Chinese traditional power grid to load growth, reduce energy consumption and improve power system reliability and flexibility.

Functional Requirements Analysis and Practical Design of Plug-and-Play Energy Interconnect Terminals

The energy Internet is a new form of energy supply and a practice of “Internet + energy”. Similar to the information internet, plug-and-play is one of the most important features of the Energy Internet, and also is one of the most important purposes of the construction of Energy Internet. Many attempts have been made to achieve this purpose. Power system is the most suitable natural carrier to construct Energy Internet, but the physical laws of power flow and information flow are different, so plug-and-play is hard to achieve and it is the primary problem to solve. This paper analyses the specific functional requirements of plug-and-play, and presents a practical design of plug-and-play energy interconnect terminals, which can realize the plug-and-play of energy terminals. The thought put forward in this paper will contribute to the construction of Energy Internet and promote the effective utilization of distributed energy.

A Survey on Energy Internet: Architecture, Approach, and Emerging Technologies

Energy crisis and carbon emission have become two seriously concerned issues universally. As a feasible solution, Energy Internet (EI) has aroused global concern once proposed. EI is a new power generation developing a vision of evolution of smart grids into the Internet. The communication infrastructure is an essential component to the implementation of EI. A scalable and permanent communication infrastructure is crucial in both construction and operation of EI. In this paper, we present an introduction and the motivation to the evolution from smart grid to EI. We also introduce a representative EI architecture, i.e., the future renewable electric energy delivery and management system. Four critical EI features are emphasized. Then, we summarize the essential requirements that EI systems have to meet. With several key supporting technologies, EI shall realize the optimal utilization of highly scalable and distributed green energy resources, so that the situation of severe energy source crisis and carbon emission can be efficiently relieved. Since an EI system might have extensively distributed consumers and devices, the guarantee of its reliability and security is extremely significant. The further specific exploration for challenges, including reliability and security, will be stated in this paper.

Research on Business Mode of Energy Storage Station under Energy Internet Background

Energy storage technology is the key technology for the development and construction of energy Internet. At present, the development and application of energy storage technology in China have made initial progress and have possessed the industrialization foundation. In this paper, the business mode of energy storage station under energy Internet background was studied. Firstly, the investment modes of energy storage station were studied from the perspective of investors and investment approaches. Secondly, revenue sources of energy storage station were analysed, focusing on the revenue of peak and valley power price difference, revenue of promoting new energy consumption and revenue of reducing user distribution station capacity construction. Based on the above, the business mode of energy storage station was put forward, which provides reference to the development of the business application of energy storage station.

Structure Analysis and Application of Big Data from the Energy Internet in Laogang Solid Waste Recycling Base

Laogang solid waste recycling base is the main place of Shanghai’s domestic waste disposal, including all kinds of electricity, heat, gas energy and load. On the basis of the independent operation of multi-energy networks, such as electricity, heat and gas, the construction of energy internet with electricity as the core and the comprehensive utilization of various energy sources have been constructed. Through the intelligent monitoring device installed in Laogang base, the real-time monitoring of the energy data including electricity, heat and gas is completed, and the concrete calculation algorithm of the big data is analyzed. Meanwhile the analysis and the application of the data are displayed.

The Proactive Defense of Energy Internet Terminals Edge-Access Using the Network Topology Autoassociation

The “Stuxnet” event and the Ukraine blockout event caused by cyberattacks have shown that it is very important for power systems to implement proactive cyber defense. With the construction of energy internet, the terminal-edge accessing proactive defense technology of energy internet has drawn lots of attentions. This paper constructed the proactive defense model of energy internet terminals edge-access using the network topology autoassociation, and established the multi-path and multi-parameter stochastic communication path construction algorithm in energy internet terminals edge-access network. To solve the problem of the transmission reliability and defense revenue decline caused by the dynamic adjustment of the association cycle, we presented a novel algorithm based on non-extensive entropy and Renyi cross entropy, which measures the abnormal of real-time network with multi-feature. On this basis, the proactive adjustment strategy of network topology autoassociation communication paths and the dynamic threshold value judgment method were designed to improve the accuracy of network anomaly measuring. Moreover, this paper also proposed a cyber-security reliability prediction algorithm based on Hidden Markov prediction model, and presented the guide paths space proactive adjustment strategy and associated cycle stretching strategy based on the network topology autoasssociation diagram of reliability prediction, guaranteeing the service quality of terminal edge access network. Finally, the model was applied to carry out experimental analysis on DoS attack, following attack, semi-blind attack defense, and network communication service quality. Theoretical analysis and simulation results show that the applicability and accuracy of the proposed model and the adjustment strategy are valid, which can support the proactive defense of energy internet terminal edge-access.

Grey Prediction Control for Gas Turbine Power Generation System

With the rapid development of CCHP, the construction of Energy Internet, the mature mining technology for natural gas and the improvement of P2G technology, the proportion of gas turbine units for generating electricity is higher and higher. As the energy conversion hub of gas and electricity, the stability of gas turbine is of great significance to the safe, economical and reliable operation of power system. In order to improve its stability, this paper applied grey prediction to its speed control system, and a simulation model for gas turbine power generation system in the mode of island operation was built on the Matlab/Simulink. The simulation results have shown that grey prediction can reduce the overshoot and accelerate the response speed of the system under both the small and large disturbance, and it can enhance the robustness of gas turbine and improve the stability of gas turbine power generation system effectively.

Research on Development Strategy of Urban Power Grid Based on Energy Internet Construction

This paper mainly describes the content of the construction of the demonstration area, from the energy supply / consumption form, bearing the main carrier transporting the energy, decision management and public services and other aspects and energy Internet application framework model is constructed, supports a wide range of power flow of AC / DC active distribution network, hierarchical partitioning of the distributed intelligent control management and open public service mode is described in detail in the paper, discusses the overall strategic planning of the urban energy Internet.

A Survey on Wide-Area Backup Protection in Energy Internet

能源互联网的建设为继电保护领域的发展提供了机遇，然而传统继电保护系统在复杂互联的电网保护中已凸显能力的不足。以广域测量技术、通信技术、计算机技术为基础，能源互联网继电保护发展为着眼于全局角度的广域保护。本文通过对能源互联网继电保护与传统继电保护的对比，介绍了能源互联网继电保护的功能、结构，以纵联差动保护为例阐述了能源互联网继电保护的主要特征，并对其未来发展进行了展望。 The construction of energy Internet provides an opportunity for the development of relay pro-tection. However, the traditional relay protection system is inadequate in the complex inter-connected power grid protection. Based on wide area measurement technology, communication technology and computer technology, the energy internet relay protection has developed into a global perspective of the wide-area protection. Through comparison of the energy internet relay protection and traditional protection, the function and structure of energy internet relay protection are introduced, and the main features of the energy internet relay protection are described in the case of the differential protection. Besides, the future development is prospected in this paper.

Advances and prospects in thermal energy storage: A critical review

Thermal energy storage is an indispensible technology for adjusting the instability and time discrepancy between supply and demand of energy. It is mainly utilized for intermittent occasion, such as solar energy, variable energy load, and excessive energy that would be wasted rather than effectively utilized if it cannot be stored. Due to their potential for efficiently improving the comprehensive utilization rate of energy, thermal energy storage systems are of growing importance within the energy awareness: solar thermal utilization, peak shaving, industrial energy saving and waste heat recovery, building energy conservation, energy internet construction and so on. Developing efficient and inexpensive thermal energy storage devices is as important as developing new sources of energy, thus, in the past several years the thermal energy storage techniques have attracted a great deal of attention from both fundamental research and technological applications. Usually, there are three different mechanisms for thermal energy storage techniques: the sensible heat storage, the latent heat storage and the themochemical heat storage. The scope of this review is to give an overview and further analysis on the research which has been done on these three kinds of thermal energy storage techniques, and this review will be beneficial for the researchers and engineers to develop more efficient and optimized thermal energy storage systems. On the one hand, the research trends of three kinds of thermal energy storage techniques from 2000 to 2015 are carefully analyzed in the present review by using the statistics functions within the Web of Science Platform managed by Thomson Reuters. The statistics results show that according to the trends on paper numbers of each thermal energy storage techniques within the whole statistics period, the latent heat storage currently can be concluded as the most popular thermal energy storage technique in terms of fundamental research, the sensible heat storage is classified as least concern because main sensible heat storage systems so far have been almost matured, and the thermochemical heat storage is attracting more and more attention from researchers. On the other hand, the main technical characteristics (such as, energy storage density, energy storage scale, energy storage period, energy storage cost, advantages of technology, disadvantages of technology, future research focus, technology maturity and so on) of three kinds of thermal energy storage techniques are systematically compared in the present review on the basis of summarizing the previous related research work, and the final compared results reveal that because the key features for each thermal energy storage technology are totally different, the selection and extension of application fields for one thermal energy storage technique cannot move forward without a full consideration of its own technical characteristics. Finally, the latest progress on the development of thermal energy storage technologies is further discussed. The technical principles of the recently developed novel thermal energy storage concepts, mainly including of new latent heat storage materials represented by heat-storage ceramics and ionic liquids, the calcium based high temperature thermochemical heat storage systems and hybrid thermal energy storage systems, are introduced in detail, moreover, the technical potential and future outlook of these new thermal energy storage concepts are also addressed.