American Journal of Applied Sciences

Transient Stability Assessment of a Power System Using Probabilistic Neural Network

Noor Izzri Abdul Wahab and Azah Mohamed

DOI : 10.3844/ajassp.2008.1225.1232

American Journal of Applied Sciences

Volume 5, Issue 9

Pages 1225-1232


This study presents transient stability assessment of electrical power system using Probabilistic Neural Network (PNN) and principle component analysis. Transient stability of a power system is first determined based on the generator relative rotor angles obtained from time domain simulation outputs. Simulations were carried out on the IEEE 9-bus test system considering three phase faults on the system. The data collected from the time domain simulations are then used as inputs to the PNN in which PNN is used as a classifier to determine whether the power system is stable or unstable. Principle component analysis is applied to extract useful input features to the PNN so that training time of the PNN can be reduced. To verify the effectiveness of the proposed PNN method, it is compared with the multi layer perceptron neural network. Results show that the PNN gives faster and more accurate transient stability assessment compared to the multi layer perceptron neural network in terms of classification results.


© 2008 Noor Izzri Abdul Wahab and Azah Mohamed. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.