IEC61850-Based Information Model Analysis And Simulation Of Distribution Network Automation

With the development of society and economy in China,the demands for the reliability and quality of power supply has increased day by day.The distribution network was delivered to the end users directly,which is the terminal of power supply service.At the same time,it is the last link to ensure the reliability of power supply and improve customers' satisfaction.Due to the lack of interoperability and the low data correlation,the widely used communication protocols can not meet the communication needs of distribution network automation at present.As enlarging the strength of distribution network automation construction,the access of a large number of automation equipment and distribution terminals will make the amount of communication information increase dramatically.In this way,the communication protocols and network performance in-depth.It can improve the communication performance and reliability of power supply.This paper deeply analyzes the modeling method of IEC61850,and the writer extends the standard of IEC61850 and the technical system of three-layer architecture to distribution automation.Firstly,the key technology and communication standard modeling of IEC61850 are discribed.The information interaction process and function of distribution network in natural situation are analyzed.Then a three-layer distribution network communication network structure is based on the object-oriented information modeling method.According to the equipment,topology and data flow classification in the distribution network communication network,the mathematical modeling from different types of data flows is improved correspondingly from the perspective of probability distribution,optimizing the information model of distribution network automation.Further,it analyzes the merits and demerits of the common distribution network topology.Meanwhile,the delay of equipment transmission and the cause of network congestion are deduced and studied,making a conclusion on the control strategies to improve the performance of the communication network.Secondly,using the model base of OPNET network simulation software and customizemodeling,the key equipment modeling of distribution network automation is optimized based on MAC address resolution technology.The influence factors of the communication performance and the network topology are simulated constrastively.Finally,a fault recovery simulation example,the regional distribution network automation project,is carried out.The simulation provides new thinking directions for future update tests and construction of IEC61850 distribution communication network.