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| Titre: | Digital distance relay reliability enhancement using real-time filter |
| Auteur(s): | Ouadi, Abderrahmane
Bentarzi, Hamid
Maun, Jean Claude |
| Mots-clés: | Distance relay unit
Power system
Real-time digital filter
SDFT algorithm
Backup protection
Current change
Current phasors
DC offsets
Inter-harmonics
Measurement accuracy
Phasor measurement unit
Power disturbances
Power swings
Reliability enhancement
Simulation result
Simulink
Switching action
Transient instability |
| Date de publication: | 2011 |
| Collection/Numéro: | International Conference on Circuits, Systems, Signal and Telecommunications - Proceedings/ (2011); |
| Résumé: | In the conventional three - zone stepped directional distance scheme, distance relay is used to provide the primary as well as remote backup protection. However, the mal-operation of this relay under stressed conditions such as power swing and switching action transient instability may affect the reliability of the whole protective scheme. The voltage and current phasors needed by the distance relay for determining the impedance may be measured with integrated Phasor Measurement Unit. However, this measurement accuracy may be affected by several power disturbances such as fast and slow dc offsets decaying due to sudden current changes, inter-harmonics, etc. To avoid these effects for improving the quality of measurements and hence the distance relay reliability, this work proposes a new real-time filtering method for removing the unwanted DC offset and hence improving SDFT algorithm. To validate the present method, the performance of developed distance relay is tested using the data generated by Simulink/MATLAB simulator. The obtained simulation results are satisfactory |
| URI/URL: | http://dlibrary.univ-boumerdes.dz:8080123456789/1868 |
| ISBN: | 978-960474271-4 |
| Collection(s) : | Communications Internationales
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