Research On Information Carrying Model Of IoT Agent For Internet Of Things In Power Systems

With the application of Internet of things more and more widely,people pay more and more attention to the research of Internet of Things in Power Systems.Perception layer is the basic core layer of Internet of Things in Power Systems.At present,the biggest challenge is that there is no unified standard for data with a wide range of sources and different structures.At the same time,there are thousands of perception layer devices,and the data security problem is becoming more and more serious.In this paper,the perception layer of Internet of Things in Power Systems is analyzed in detail from two aspects of data standards and data security,and an IOT agent information carrying model is proposed.At the same time,two kinds of hybrid encryption schemes are given for the data of different security levels,which can ensure the rapid and effective transmission of data and improve the security of data.The main work and research contents are as follows:(1)Aiming at the problem of large amount of data and various data formats in the perception layer of Internet of Things in Power Systems,an information carrying model of IOT agent is constructed.Firstly,the characteristics and data formats of existing communication protocols in the perception layer are analyzed,and the massive terminal data is classified;Then,the advantages and disadvantages of binary,XML and JSON data formats are analyzed,and a general binary data packet format is defined to encapsulate different types of data information in the perception layer.(2)In the process of data security transmission,DES algorithm,AES-128 algorithm and RSA algorithm are used for hybrid encryption of the data with different security levels,digital signature technology is used for signature authentication,and MD5 algorithm is used for data integrity inspection,so as to realize the confidentiality,non-repudiation and integrity of data.(3)The OPNET software is used for network simulation,and hierarchical modeling method is adopted to compare the data transmission delay and packet loss rate of different length packets in two network scenarios with and without IOT agent,which verifies the effectiveness of IOT agent information carrying model;Finally,the design scheme of applying the model to the visual engineering management and control system is proposed,and the video data format is unified for transmission,and the feasibility of the scheme is analyzed.