210-alcantara-summary - An ANN system to on-line detection...

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An ANN system to on-line detection of sag, swell and transient voltages F. J. Alcántara, J. R. Vázquez, P. Salmerón, A. Pérez Departamento de Ingeniería Eléctrica y Térmica Escuela Politécnica Superior. Universidad de Huelva Crta. Palos de la Frontera s/n., 21819, Palos de la Frontera, Huelva, Spain Phone: +34-959217579, Fax: +34-959217304, e-mail: [email protected], [email protected], [email protected], [email protected] 1. Brief introduction The analysis of power quality in electrical power systems includes the study of transient disturbances as frequency variations, sags, swells, flicker or interruptions, [1-3]. In this paper, a measurement system of some transient disturbances based on Artificial Neural Networks will be presented. A feedforward Artificial Neural Network (ANN) has been off-line trained to detect the initial time, the final time and the magnitude of voltage sags and swells. Besides, the designed system will be applied to detect transient voltage in electrical power systems. The performance of the designed measure method will be tested trough a simulation platform designed in ®Matlab/Simulink through the analysis of some practical cases. Keywords: Electrical power quality, transient disturbances, measurement, artificial neural networks, feedforward 2. Neural network architecture The artificial neural networks had been applied successfully in several topics of the Electrical Engineering, including the detection of some voltage disturbances [3,4]. The speed and the parallelism of the calculations are the main advantages of these techniques. In this work, a feedforward ANN has been designed for transient voltage disturbance measurements. The ANNs include a large number of strongly connected elements: the artificial neurons, a biological neuron abstraction. The model of an artificial neuron in a schematic configuration is shown in figure 1.
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This note was uploaded on 09/28/2010 for the course EPS 090229 taught by Professor Nxhviet during the Winter '10 term at Hanoi University of Technology.

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210-alcantara-summary - An ANN system to on-line detection...

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