35 Kv And The Research Of Intelligent Substation Merge Unit Software And Hardware Implementation

In recent years,With the government vigorously promote smart substation,the development of new advanced technology and the improvement of the grid voltage level, our substation intelligent become an inevitable trend of the construction and promotion. The most important feature of intelligent Substation is collection digitization of information and communication platform network, therefore, intelligent substation process level equipment electronic transformer digital interface-combined unit have Important research significance.Combined unit as the main part of the digital interface of electronic transformer, It main function is to collect electronic transformer digital signal, after processing and framing, in accordance with IEC61850-9-1/2standard to the protection, monitoring and control, and other secondary equipment through the serial data transmission. Advantages of merging units is to simplify digital device structure, to improve the accuracy and stability of the transmission signal, conducive to the realization of the spacer layer device data sharing and system integration.This thesis is based on the combined unit First specification, characteristics of35kV substation and research of the major manufacturers combined unit, put forward the meet of35kV intelligent substation consolidated unit design, it based on ARM+FPGA dual-processor implementation and divided into six modules, Data receiver module, data processing module, the synchronization function module, open into the open module and data transmission module and power module, then details the function of each module and works. The main achievements of the features include GPS clock synchronization, IRIG-B encoding, Manchester coding, CRC checksum, digital filtering, sample rate conversion, frame format combinations, and Ethernet packet sent. Finally, To carry out the function of each module testing and system testing, Compared with the functional requirements through the completion of the final device’s function, to make summarized, and areas for improvement.