Fault judgment and time sequence analysis system based on fault recording

The invention discloses a fault judgment and time sequence analysis system based on fault recording, and belongs to the technical field of relay protection secondary system monitoring. Comprising a data reading and preprocessing module, a fault recording data fitting device, a fault recording data feature extractor, a fault feature recognition and classifier, an OCR constant value recognition and input module, a protection action discriminator and a time sequence analysis system. A digital signal classifier is trained according to a historical fault database, the classifier is adopted to process fault recording data in real time and identify normal operation states, fault states and types of the fault recording data, the system is suitable for waveform data captured by a fault recording device of a transformer substation with the 110kV voltage class and above, and the system assists in fault waveform analysis and improves the fault waveform analysis accuracy. The fault analysis efficiency can be greatly impro