Design Of Data Acquisition System Based On IEC61850 Protocol Design And Implementation

With the acceleration of global economic integration,the electric power industry has become the main pillar industry of national growth.Since the beginning of the 21 st century,countries around the world have paid more and more attention to the power industry,and power technology has also made great progress.In the process of transforming the power system to the smart grid,compatibility issues have become increasingly prominent.In terms of substation communication,due to the large investment in the existing protocol equipment,it must be transformed into the IEC61850 protocol to ensure that electrical equipment can communicate effectively with each other.communication.Through the analysis of the IEC61850 protocol,the technical characteristics of its system structure,modeling method,service interface and service mapping,configuration description language,etc.are clarified.Based on the above characteristics and the research on the IEC61850 protocol modeling technology,the mapping of the protocol is analyzed The principle and relationship,complete the modeling of the IEC61850 protocol,can realize the data conversion from the traditional protocol to the IEC61850 protocol,and realize the monitoring of the data,so as to meet the actual needs of the existing distribution network system in my country.Design data acquisition system according to functional requirements,including system architecture design,database design,interface design and system prototype design.Among them,the system topology diagram and data flow chart show the overall structure and data flow of the system,the infrastructure design and main function design ensure the reliability and efficiency of the system,and the business process design makes the operation of the system clearer.The design of real-time database and historical database can meet the requirements of data storage and query,the design of internal interface and external interface facilitates data transmission and interaction,and the design of visual configuration and monitoring system improves the usability and user experience of the system.The ARM development board based on the Linux operating system is used to develop the gateway software for protocol conversion,and an application program interface is provided to provide an information bridge for the communication between the client and the field device.First,open the software of the analog device to generate data,and the gateway converts the collected data into IEC61850 protocol data,and then publishes it to the cloud proxy server through the MQTT protocol after encoding and encryption.Then the monitoring service deployed on the server,the MQTT protocol decrypts and decodes the device data cached in the subscribed proxy service queue,and stores them in the MEMCACHED real-time database and the MYSQL historical database respectively according to a certain data format.Finally,the monitoring platform can query the data in the database and send the data to realize the monitoring of the data and complete the information interaction between the devices.