Front Data Acquisition Unit According To IEC61850

Digital substation construction has been put on the agenda, IEC 61850 standards-based digital substation system on behalf of the substation automation system development, but the combined units and large-scale electronic transformer substations may also be applied to still need some time. In particular, China has been put into operation the 110kV power grid and below the traditional level of the more than 20,000 substations, substation automation system needs of existing digital substation automation system to the transition program. In view of this situation, this proposed pre-data acquisition unit mainly for the traditional electromagnetic voltage /current transformer taking into account the digital transformer, transformer the analog acquisition and the amount of access to state information and in accordance with IEC61850-9-1 standard data transmission, while interval level intelligent devices capable of receiving the GOOSE control commands sent on the circuit breaker to operate.Firstly an overview of Digital Research and Development of substation, substation automation system through the basic functions and a summary of the development process, explain the significance of this research topic. Research related with this issue of the IEC 61850 standard, merging cells and embedded systems,object-oriented technology and UML language, studied the use of the Blackfin processor in this topic main characters and kernel architecture, selected the The system uses an embedded operating system.To be developed by the FDAU the functionality and performance analysis, the framework of the program design and detailed design of key modules. Then the hardware structures and programming. Focus on the core components of CPU board of the principles and PCB design, sampling theory and sampling control module processes and sampling methods were studied simultaneously. IEC 61850 standard requirements for the realization of information-sharing, pre-built data acquisition of the complete information model, and implemented based on IEC 61850-9-1 standard sample value mapping and packet-based IEC 61850-8-1 standard for substation General Event GOOSE message mapping.Finally, Front Data Acquisition Unit of functionality and performance testing and validation. Experimental results and error analysis show that the pre-developed data acquisition unit to achieve the design objectives and practical requirements.This implementation developed FDAU traditional substation intelligent measurement and control, to meet the IEC 61850 standard of openness and interoperability required to meet the digital substation system process level device information sharing requirements. The digital transformation of conventional substation has important theoretical and engineering value. As the digital transformation of the traditional substation to carry out the process, the device will be widely used, with significant business and social benefits.