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Artificial neural network approach to distance protection of transmission lines

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2 Author(s)
Coury, D.V. ; Dept. of Electr. Eng., Sao Paulo Univ., Brazil ; Jorge, D.C.

A distance relay for the protection of transmission lines is usually designed on the basis of fixed settings. The reach of such relays is therefore affected by the changing network conditions. The implementation of a pattern recognizer for power system diagnosis can provide great advances in the protection field. This paper demonstrates the use of an artificial neural network as a pattern classifier for a distance relay operation. The scheme utilizes the magnitudes of three phase voltage and current phasors as inputs. An improved performance with the use of an artificial neural network approach is experienced once the relay can operate correctly, keeping the reach when faced with different fault conditions as well as network configuration changes

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Power Delivery, IEEE Transactions on  (Volume:13 ,  Issue: 1 )