CLASSIFICATION METHOD FOR QUALITY OF POWER SIGNAL USING SPEECH PROCESSING TECHNIQUES, MONITORING APPARATUS FOR QUALITY OF POWER SIGNAL USING SPEECH PROCESSING TECHNIQUES AND MONITORING SYSTEM FOR QUALITY OF POWER SIGNAL USING SPEECH PROCESSING TECHNIQUES

摘要

PURPOSE: A power quality classifying method using a voice processing technique, a power quality monitoring device thereof, and a power quality monitoring system thereof are provided to accurately classify an external disturbance signal. CONSTITUTION: A power quality monitoring device (100) includes a transformer (110), an A/D converter (120), a classification processor (130), and a memory (140). The transformer reduces a power signal transmitted from a power system to a reference level. The A/D converter converts the power signal into a digital signal. A classification processor classifies power quality of the power signal by using a mel frequency cepstral coefficient (MFCC) value about the power signal. The memory stores data used for power quality classification in the classification processor. [Reference numerals] (110) Transformer; (120) A/D converter; (130) Classification processor; (131) Power signal statistics unit; (132) Initial classification unit; (133) MFCC value sampling unit; (134) GMM classification unit; (140) Memory