Research On Cyber Physical System Of Active Distribution Network Based On Edge Computing

Active distribution network(ADN)supports a wide range of access of distributed energy sources,energy storage facilities and active loads,realizing highly integrated control of energy flow and information flow.It is also an intelligent infrastructure highly integrated with information physics.With the development of active distribution network,the amount of data and computation generated by network edge devices increases dramatically,which brings pressure on data storage,cloud computing and transmission bandwidth.The traditional cloud computing model is difficult to guarantee the real-time performance of data analysis,processing and response,which makes the non-real-time performance of information flow directly affect the stability of energy flow and the reliability of control.In order to solve the above problems,this paper carries out the research cyber physical system of active distribution network based on edge computing.Firstly,the architecture characteristic model of active distribution network cyber physical system is analyzed,and an active distribution network logic protocol model based on IEC61850 standard is designed according to the demand of active distribution network for information interaction,interconnection and ubiquitous perception.Secondly,this paper analyzes similarities and fusion methods of edge computing,active distribution network and CPS.Referring to the PE-P-CE structure of PTN network,a PTN physical architecture model of active distribution network based on edge computing is proposed.Thirdly,aiming at the demand of active distribution network for real-time,data security and network bandwidth,a collaborative model of active distribution network edge computing and cloud computing is proposed.Through two examples of power data analysis and load forecasting of electric vehicle charging station,it is verified that active distribution network based on edge computing can realize the local optimization of the storage and processing data of edge nodes,which can improve the processing efficiency,ensure the real-time performance of data analysis and processing,and the accuracy of load prediction.Finally,aiming at the problems of many equipment manufacturers and lack of unified standards in active distribution network,and the difficulty of expanding distribution transformer monitoring terminal itself,a hierarchical autonomous collaborative active distribution network cyber physical system control model based on edge computing is constructed.According to key requirements of edge computation such as real-time,intelligence,this paper proposes an evaluation system based on edge computing CROSS index management and control model,and further constructs the data transmission architecture of active distribution network based on edge computing.