Detection and location of transient power quality disturbances in white noise using wavelet techniques

Abstract

In this paper, the principles of wavelet transform, discrete stationary wavelet transform and wavelet packet transform were presented. Transient power quality analysis method based on wavelet techniques was then porposed. Finally, detection of noisy power quality disturbances such as voltage sag, voltage swell, voltage interruption, transient harmonics, impulsive transient and oscillatory transient were simulated with MATLAB emulator. The perfect results of simulation showed that the presented method could denoise and detect the transient disturbances accurately, which provided support for improving power quality. © 2012 Springer-Verlag.