The Design Of Sampling System Of Master Slave Communication Based On FPGA

In power system, often using remote terminal unit RTU (Remote Terminal Unit) installedin power plant, substation and other production site, it will be responsible for the transmissionof analog quantity and quantity of state running state to the dispatch center, theimplementation of scheduling center sent down the instructions at the same time. At present,the distributed RTU is the trend of development of power system，the specific RTUresponsible for specific function, this paper presents the design and implementation of a newRTU system based on master-slave FPGA AC sampling.The main control FPGA and multi block from the design of the FPGA module, thecommunication between the strong anti-jamming LVDS (Low-Voltage Differential Signaling)interface, control from the timing of FPGA is mainly responsible for the AD sampling chip,the main FPGA using parallel way to receive a plurality of collecting data from the FPGAchip; module can support1to6pieces of AC sampling board are sampled simultaneously, andcan achieve complete synchronization. The main FPGA of FFT (Fast Fourier Transformation)data from FPGA transform, it can be of great use of the processing ability of the FPGA tomeet the needs of. Because each FPGA has a board from the address sign their own, so themain FPGA can be easily identified from the FPGA fault and whether online. At the sametime according to the requirements of temporary from the increase in the number of FPGAboard, can support up to8to48of the synchronous AD AC sampling (i.e.1to6blocks fromthe FPGA board), flexibility and strong. The whole module plate and the back platestructure, which can greatly reduce the volume and space.