The Technical Support System Of Distribution Station Based On Internet Of Things Architecture

At present,the construction of China's smart power grid is still faced with the constraints and challenges in the aspects of power distribution system upgrading,automation of power distribution station and intelligent instrument.With the continuous expansion of the distribution network scale and a large number of new load access,the existing monitoring devices have low acquisition frequency,few data types and high time delay,and the distribution station has a weak sense of full state.The controllable equipment of distribution station keeps increasing,but its control ability is not strong.Therefore,it is imperative to build the technical support system of distribution station based on the intelligent and networked distribution Hub Net based on the Internet of things,so as to realize the intelligent and efficient full state perception and operation control of low-voltage distribution network with distribution station as the main body.The specific work of this paper is as follows:(1)Based on the analysis of the operation situation of the traditional transformer terminal,the demand analysis of the transformer Hub Net is carried out for the application scene of the transformer distribution station.Based on the hardware platform and software APP of Internet of things,the design scheme of hardware and software structure is given.From the core control,communication interface and function realization three levels to carry out the hardware structure design,build a unified hardware platform;Based on the embedded Linux operating system,the container technology is used to realize the app-application of software and realize the full-state perception and intelligent control of the distribution terminal.(2)With transformer Hub Net as the core,build a distribution station technical support system based on the Internet of things architecture,from the perception layer,network layer,platform layer,application layer to discuss the system structure and support technology;Aiming at the problem of the coordination between the Hub Net and the master station,the cloud side coordination architecture and the cloud side coordination strategy of the technical support system of the distribution station are studied from the aspects of IaaS,PaaS and SaaS,so as to realize the close coordination between the edge computing of the Hub Net and the cloud computing of the master station.Aiming at the problem of local resource limitation of distribution Hub Net,the calculation and unloading strategy of technical support system of distribution station is deeply studied to realize the joint optimization of system calculation and communication resource allocation.(3)Based on the in-depth analysis of the information security risks faced by the technical support system of power distribution station,the information security risk assessment system of the technical support system of power distribution station is established according to the national relevant information security risk assessment standards and norms and the implementation indicators of Internet of things,cloud computing and edge computing.A·J·KLEE method was used to calculate the weight value,hierarchical extension method was used to calculate the risk level correlation degree,the system information security risk comprehensive evaluation level was given,and the effectiveness of the method was verified by case analysis.(4)The implementation of the application function of the Hub Net and the development of the master station system are carried out.The development of the application function of Hub Net is based on the idea of software app-ization,and the container technology is used to realize app-ization The development of configuration Hub Net application function adopts the cross-development method,which is used to write and compile application program code in the host machine,and to containerize the application program to generate Docker image,which is transferred to distribution transformer Hub Net via NFS or TFTP to run.The development of the main application APP of Hub Net was carried out.The implementation of the main system based on browser/server(B/S)architecture,Java server page(JSP)technology was adopted to realize the front-end interface development,using SQL Server relational data to realize data storage management,using the Java database connectivity(JDBC)technology to realize database access,uses the dynamic link library(DLL)technology provide the code and data for the application.The main functional modules of the system are developed.The operation of the system shows that the system has realized the main functions of technical support system of distribution station flexibly and efficiently.