Detection of Power Quality Disturbances Using Wavelet Transform Technique

PQ (Power Quality) has become a major concern owing to increased use of sensitive electronic equipment. In order to improve PQ proble ms, the detection of PQ disturbances must be carried out first. It is the fact that PQ d isturbances vary in a wide range of time and frequency, which make automatic detection of PQ problems often difficult and elusive to diagnose. Hence one of the most important issues in power quality problems nowadays is how to detect these disturbance waveforms automatically in an efficient manner. PQ disturbances have been defined into several cat egories and software based novel approach techniques for detection of PQ disturbances by time and frequency analysis with wavelet transform are proposed. These techniques detect PQ problems of waveform distortion and provide a promising tool in the field of electrical power quality problems.