Monday, November 29, 2010

On-line Fault Detection of Transmission Line Using Artificial Neural Network

S. M. El Safty, H. A. Ashour, H.El Dessouki and M. El Sawaf
As the voltage and current waveforms are deformed due to transient during faults, their pattern changes according to the type of fault, The Artificial Neural Network  (ANN) can then be used for fault detection due to its  distinguished behavior in pattern recognition. In order to  minimize the structure and timing of the ANN, preprocessing of  the voltage and current waveforms was done. The data delivered from a simulated power system using PSCAD (EMTP with cad  system) was used for training and testing the ANN. An  experimental setup, consists of a 3 phase power supply module and transmission line module, is utilized. A set of signal  conditioning circuits is designed and implemented in order to transfer data to a PC which is used as an on-line relay for fault  detection. This is done via a data acquisition card (CIODAS1602/   12). The Matlab program captures and processes real  data for training the ANN. Applying different types of faults for  testing the system, right tripping action was taken and the type  of fault was correctly identified. The suggested artificial neural  network algorithm has been found simple and effective hence  could be implemented in practical application.

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