Acquisition and hierarchical identification system of overvoltage data and hierarchical pattern identification method of overvoltage types

The invention discloses an acquisition and hierarchical identification system of overvoltage data, which comprises a primary voltage dividing device, a secondary voltage dividing module, a preposed signal conditioning module, a signal triggering module, a data acquiring and processing module and an upper analyzing host machine, The system realizes the effective identification of 35kV arc-grounding overvoltage through acquiring an overvoltage waveform and extracting parameters capable of effectively reflecting intrinsic characteristics of the arc-grounding overvoltage according to the occurrence mechanism of the arc-grounding overvoltage by aiming at the problem that the traditional power system monitoring equipment does not have the capacity of analyzing overvoltage types, and the system has the advantages of high judgment speed and high application efficiency. In addition, the invention also provides a hierarchical pattern identification method of the overvoltage types; in the type determination method, based on the complete and sufficient analysis performed on characteristics of existing overvoltage types, characteristic parameters which can distinctly reflect the characteristics of the overvoltage are selected from each type, and therefore a reliable theoretical foundation is provided for the identification of the types; and moreover, the determination process is concise and efficient.