| The integration of energy physical systems and information systems is the product of the fourth industrial revolution,and it is also the general trend of industrial development in the future.The application of modern information and communication network technology to the integrated energy system can break through the bottleneck of energy utilization efficiency growth,truly achieve a high proportion of renewable energy consumption,improve the flexibility of the system,and open up a blue ocean for future energy economic development.The concept of Internet of Things and ubiquitous network also has a new interpretation of today’s integrated energy system.In the context of the ubiquitous Internet of Things,the physical system and the information system are deeply coupled,and the information communication system and the physical system influence each other.Improving the operating environment of the information and communication system is of great significance to improving the energy efficiency of the integrated energy physical system;At the same time,in the context of the ubiquitous Internet of Things,considering the impact of information and communication systems is also of great significance to the evaluation of key nodes in the integrated energy cyber-physical system.Under the above background,the paper proposes a data collection,transmission,and control system for an integrated energy system under the ubiquitous Internet of Things.And based on the three-tier physical architecture of the traditional integrated energy system,a three-tier star communication network model of the integrated energy system is built.Model and simulate the communication network part of the integrated energy cyber-physical system with the aid of the Internet of Things simulation toolbox.Then,based on the three-layer star communication network model of the integrated energy system proposed in Chapter 2,combined with the spatial distribution of the subsystems of the integrated energy and the different time delay characteristics of each energy flow,the integrated energy system communication network is divided into virtual local area networks and the pre-and post-division The scene is compared and analyzed.As a result,the low-latency and fast transmission of information on the communication network of the integrated energy system is realized.On this basis,the problem of communication network operation limit that meets the set link utilization threshold and system service response time threshold is studied,which provides an analysis basis for the establishment of the communication network scale of the integrated energy system.Finally,based on the deep coupling of the integrated energy information system and the physical system under the ubiquitous Internet of Things,an evaluation method for the key nodes of the integrated energy cyber-physical system considering the fluctuation of the throughput rate of the information network is proposed.First,a comprehensive energy physical system and information network model is established,and a correlation matrix between information network nodes and physical system nodes is established.Then use the number of M-order neighbors as structural evaluation indicators,and use tidal flow impulse rate,gas supply pipeline pressure impulse rate,and data throughput rate of change as physical system and information system operation evaluation indicators,and conduct key node synthesis for the integrated energy cyber-physical system Evaluation.The evaluation results are basically consistent with the important nodes in the actual system.The full text of the research has realized the fast communication of the integrated energy cyber-physical system.By setting the relevant threshold,the problem of maximum operation flow under the condition of meeting the threshold is studied.Finally,we consider the M-order neighbor number,line power flow rate,pressure variation rate of gas pipeline and data throughput change rate to realize the key node evaluation. |
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