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ANN applications in fault locators

Purushothama, GK and Narendranath, AU and Thukaram, D and Parthasarathy, K (2001) ANN applications in fault locators. In: International Journal of Electrical Power and Energy Systems, 23 (6). pp. 491-506.

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Recent developments indicate that Artificial Neural Networks (ANNs) may be appropriate for assisting dispatchers in operating electric power systems. The fault location algorithm being a key element in the digital relay for power transmission line protection, this paper discusses the potential applicability of ANN techniques for determination of fault location and fault resistance on EHV transmission lines with remote end in-feed. Most of the applications make use of the conventional Multi Layer Perceptron (MLP) model based on back propagation algorithm. However, this model suffers from the problem of slow learning rate. A modified ANN learning technique for fault location and fault resistance determination is presented in this paper. A reasonably small NN is built automatically without guessing the size, depth, and connectivity pattern of the NN in advance. Results of study on a 400 kV transmission line are presented for illustration purposes. Performance of the modified ANN is compared with the analytical algorithms and conventional MLP algorithm for different combinations of pre-fault loading condition, fault resistance and fault location. The results are found to be encouraging.

Item Type: Journal Article
Publication: International Journal of Electrical Power and Energy Systems
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Neural networks;Fault
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 02 Apr 2007
Last Modified: 19 Sep 2010 04:37
URI: http://eprints.iisc.ac.in/id/eprint/10602

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