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Two-stage Planning Method for energy router Considering Its Optimal Operation in Distribution Networks

CSEE Journal of Power and energy Systems 2024年第2期10卷 605-616页

作者： Meifu Chen Mingchao Xia Qifang Chen School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China

An energy router can effectively optimize the network loss and power quality of distribution networks. The optimal configuration of the energy router is relatively complex because issues dynamically influence each other, such as the location of the energy router, optimal number and capacity of its ports, and building new distribution lines for the ports. Presently, there has been very few research studies on the practical problems for the energy router. In this paper, a planning model of an energy router combined with the distribution network is established, which fully exploits the active and reactive power control abilities of the energy router to optimize the operation of the grid. The configuration problem is decoupled into two stages. The upper layer determines the location of the energy router and the parameters of the candidate new distribution lines for the ports. The lower layer calculates the optimal configuration of the energy router by minimizing the total annual cost. Because of the same rated bus voltage in the distribution network, the existing structure of the energy router is changed to be more applicable for the distribution network, and then the power flow model of the energy router is also modified. Due to the nonlinearity of the model, the planning model is converted into a mixed-integer second-order cone model to solve efficiently. In addition, some core factors influencing the optimal scheme of the energy router are also analyzed in this paper. Simulation results show that the optimal scheme of the energy router can significantly improve the economic deployment of the energy router, and optimize the network loss and power quality of the distribution network.

关键词： Capacity allocation distribution network energy router optimal operation

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Planning Model for energy routers Considering Peer-to-Peer energy Transactions Among Multiple Distribution Networks

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CSEE Journal of Power and energy Systems 2024年第3期10卷 1026-1043页

作者： Meifu Chen Mingchao Xia Qifang Chen School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China IEEE

A high proportion of renewable energy affects the power quality of distribution networks,and surplus energy will be sold to the upstream grid at a low *** this paper,considering peer-to-peer energy transactions,the energy router-based multiple distribution networks are analyzed to solve the above problems and realize collaborative consumption of renewable ***,the investing cost of an energy router is high,and research on the economic operation of energy routers in distribution networks is ***,this paper establishes a planning model for energy routers considering peer-to-peer energy transactions among distribution networks,and explores the benefits of peer-to-peer energy transactions through energy router based multiple distribution networks.A structure of an energy router suitable for peer-to-peer energy transactions is selected,and a power flow calculation model based on a multilayer structure is *** energy router’s scheduling model is established,and unique functions of the energy router and revenue of each distribution network are considered.A power flow calculation model based on peer-to-peer interconnection of multiple distribution networks through energy routers is also ***,simulation results verify the effectiveness of the proposed planning *** show that peer-topeer energy transaction among distribution networks through energy routers can effectively reduce the comprehensive cost of distribution networks,significantly improve the power quality of the distribution networks,and reduce the impact of power fluctuation on the upstream grid incurred by the distribution network.

关键词： Capacity allocation energy router multiple distribution networks peer-to-peer energy transaction power flow optimization

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Day-ahead P2P energy Sharing Strategy Among energy Hubs Considering Flexibility of energy Storage and Loads

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CSEE Journal of Power and energy Systems 2024年第3期10卷 1105-1118页

作者： Penghua Li Wanxing Sheng Qing Duan Jun Liang Cunhao Zhu China Electric Power Research Institute Beijing 100192China School of Engineering Cardiff UniversityUK IEEE

Multi-energy systems are one of the key technologies to tackle energy crisis and environmental *** energy hub(EH)is a minimum multi-energy *** of multiple EHs through energy routers(ERs)can realize mutual energy *** paper proposes a peer-to-peer(P2P)energy sharing strategy between EHs including ERs in an interconnected system,which is divided into two *** the lower level,a method of determining the charging/discharging constraints of energy storage devices is *** on the Lyapunov optimization method,virtual queues are used to model the energy storage devices and flexible loads in the *** objective is to minimize the overall operating cost of the interconnected *** the upper level,a non-cooperative game model is introduced to minimize the cost of purchasing power from other EHs for each EH.A best response-based method is adapted to find the Nash *** simulation outcomes demonstrate that application of the proposed strategy can reduce operating costs of an interconnected system and each *** basis of a real-world dataset of interconnected EHs,both analytical and numerical results show the effectiveness of the proposed strategy.

关键词： energy hub energy router Lyapunov optimization non-cooperative game peer to peer virtual queue

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Research on power electronic transformer applied in AC/DC hybrid distribution networks

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Global energy Interconnection 2018年第3期1卷 396-403页

作者： Yiqun Miao Jieying Song Haijun Liu Zhengang Lu Shufan Chen Chun Ding Tianzhi Cao Linhai Cai Yuzhong Gong State Grid Shanghai Municipal Electric Power Company State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute State Grid Jibei Electric Power Company Department of Electrical and Computer Engineering University of Saskatchewan

The AC/DC hybrid distribution network is one of the trends in distribution network development, which poses great challenges to the traditional distribution transformer. In this paper, a new topology suitable for AC/DC hybrid distribution network is put forward according to the demands of power grid, with advantages of accepting DG and DC loads, while clearing DC fault by blocking the clamping double sub-module(CDSM) of input stage. Then, this paper shows the typical structure of AC/DC distribution network that is hand in hand. Based on the new topology, this paper designs the control and modulation strategies of each stage, where the outer loop controller of input stage is emphasized for its twocontrol mode. At last, the rationality of new topology and the validity of control strategies are verified by the steady and dynamic state simulation. At the same time, the simulation results highlight the role of PET in energy regulation.

关键词： AC/DC hybrid distribution network Power electronic transformer(PET) Clamping double sub-module(CDSM) energy router

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Research on Control Strategy of General Control System for Building Cold and Heat Sources Based on energy Internet

Research on Control Strategy of General Control System for B...

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第30届中国控制与决策会议

作者： Chen Feng Meng Qingda Yang Guang Zuo Zhuang Zhang Xin Zhang Shicong Liu Weinan State Grid Corporation of China State Grid Liaoning Electric Power Supply Co.LTD School of Information Science & Engineering Northeastern University

At present, there is little literature on the planning and modeling of energy Internet to carry out research. Those plans have not fully considered the difference between multiple distributed energy systems and electric/hot/cold multi-energy flow coordination and optimization. In view of the above problems, this paper takes the multi-energy complementarity and network mutual economic study into full consideration, based on the energy router building cold and heat source energy internet planning strategy as well as the first energy grid division and energy router location which followed by the lowest annual cost as the goal,-1 mixed integer linear programming model, with the help of commercial software Cplex solution to achieve the energy router equipment configuration and local area network electrical/thermal network at the same time. Finally, the energy supply a network within the energy path optimization. And then, the user optimize the control by the energy router, ensuring that the user side maximizes the benefits.

关键词： energy Internet Cold and Heat Source energy router Optimal Control

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