Voltage Event Detection and Characterization Methods: A Comparative Study

The paper presents a comparative study of the most commonly used methods of detection and analysis of voltage events in power systems. The performance of the rms method, the fundamental component estimation using discrete Fourier transform and Kalman filtering and the use of wavelet analysis for detection and estimation of magnitude and duration of voltage events, are studied under simulation using voltage dips of different magnitude, duration and point-on-wave of beginning in a pure sinusoidal voltage supply and also for a voltage supply with different harmonic distortion levels. The methods employed are also tested using real voltage events measured in a low voltage distribution system discussing the results obtained