Distribution Network Fault Data Acquisition And Processing Based On Fpga

The issue comes from the cooperation of an enterprise, plans to design an aptitude applications system of comprehensive fault line selection for enterprise distribution network.Power system neutral grounding can be divided into two categories:high-current grounding (the neutral point effectively grounding) and the small-current grounding (the neutral point non-effectively grounding). In the high current ground way, there are:neutral grounding, neutral point of low resistance, low electrical resistance or the resistance grounding; in the small current ground way, there are: neutral point coil grounding, neutral ungrounded and high-resistance grounding the neutral point, etc.At present, the small current grounding system of single phase fault line devices are centralized structure, the field data of distribution network and more lines (zero sequence voltage, zero sequence current, line voltage, etc.) through the signal transmission line sent to the equipment of fault line select to centralized collection, centralized treatment, this methodology owing to the fault line selection field between the devices is analog signal transmission, and ssusceptible to interference, the CPU or a link failure will cause the entire system can't work, so there is many drawback. This issue is field data acquisition and processing unit studies in field bus-based fault detection devices, each circuit configuration data acquisition based on FPGA processors, field data acquisition and processing, the processed data through the PROFIBUS bus passed to the fusion line selection unit, the completion of data collection, analysis, and digital communications field.