In electrical energy power networks, disturbances can cause problems in electronic devices so their monitoring is fundamental in Power Quality. In this paper we address the problem of disturbances estimation by using the Hilbert Transform (HT). It is employed as an effective technique for tracking the voltage waveforms in electrical distribution systems. The mathematical simplicity of the proposed technique, compared with the commonly used algorithms from the literature, renders them competitive candidate for the on-line tracking of disturbances. The accurate tracking of the HT facilitates its implementation for the control of disturbances mitigation devices. Simulation results are provided to verify the tracking capabilities of the algorithm and this has been tested under different conditions: voltage dip with phase jump, noise and frequency changes shows that the Hilbert Transform can be used as a valid methodology for this type of phenomena.
Caciotta, M., Giarnetti, S., Leccese, F., Z., L. (2009). Detection of Voltage Dips and Micro Interruptions Using the Hilbert Transform. In XIX IMEKO World Congress - Fundamental and Applied Metrology (pp.2032-2035). Lisbona : UNIVERSIDADE TECNICA DE LISBOA.