Transient power quality detection device and method for the same

The invention discloses a transient power quality detection device and a method for the same, belonging to the technical field of power transmission and distribution. The method comprises the following steps of: acquiring an undisturbed standard signal, processing the undisturbed standard signal with an improved S transformation method to get a base matrix of the undisturbed standard signal; acquiring voltage sag, voltage swell, voltage interruption, high-frequency transient disturbing signals and low-frequency disturbing signals, scaling a curve chart of the signals after being processed by the improved S transformation, building a standard template, and storing the template in a database; acquiring three-phase voltage and three-phase current data in a power grid; and matching the digital image curve with the standard template in the database according to a digital image matching principle so as to get the disturbance patterns. The invention provides the transient power quality detection device and the method for the same based on the improved S method, optimal design is provided in the aspects of detection accuracy, function implementation, data storage and the like of the device, so that real-time analytical ability and remote communication capability of transient power quality detection are improved.