Networking Characteristics Analysis Of IEC 61850 Digital Device Based On Real-time Simulator

With the rapid development of the social economy,the problems of environmental pollution and resource shortage have become more and more serious.Many countries are actively exploring new energy sources in order to achieve the integration of multiple energy systems.Since the process of power energy conversion and utilization is clean,efficient and convenient transmission,the power system is becoming more and more important in the multi-energy integration systems.In the power system,the problems of aging of primary and secondary equipment and poor interoperability between equipments have been highlighted.The International Electrotechnical Commission TC 57 has issued the IEC 61850 standard.The IEC 61850 standard has been used in intelligent substations and provides a good basis for interoperability between devices in substations.Based on the application experience of IEC 61850 standard in intelligent substations,this paper studies the communication information model and networking characteristics of flexible interconnected urban distribution network.Firstly,the paper summarizes the domestic and international research status of intelligent distribution network communication information modeling,power system real-time simulation and communication network simulation technology,and puts forward the focus of this paper.Then briefly introduced the contents of IEC 61850 standard system,and summarized the compatible logical nodes class,and discussed the configuration file,configuration process and message service in the actual engineering project.Then introduced the basic architecture of the flexible interconnection demonstration project,and learned the flexible interconnection with IEC 61850 intelligent substation information stratification and modeling ideas.Then the grid information model was built.Finally,a closed-loop test experiment platform of line protection device based on IEC 61850 was built by RTDS.Several tests were carried out on the demonstration project AC distribution network protection equipment.The OPNET simulation software was used to simulate the three-layer and two-network and the three-layer and one-network networking scheme.The simulation results proved that the RTDS closed-loop test experimental platform has a good test effect and can provide a new method for testing the demonstration engineering protection and control device.The established demonstration engineering information model and the proposed OPNET network simulation solution can be used for the subsequent research on the information model of multiple energy systems.