Protection of electrical networks
مخطط الموضوع
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Matter : Protection of electrical networks
Unité d'Enseignement Découverte (UED)
Niveau : L 3 Electrotechnique
Volume Horaire : 22.5 h (cours : 1h30m /semaine)
Crédit = 1
Coefficient : 1
Enseignant : Dr. Abdelkader YOUSFI
E-Mail : a.yousfi@univ-dbkm.dz
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Become familiar with the various processes and techniques for protecting electrical networks and their components against different constraints to ensure better protection.
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Basic concepts of electricity, Equivalent circuit diagrams of electrical circuits, Electrical power networks (composition, modeling, and calculation
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Chapter 1. Introduction to Protection: (4 weeks)
General concepts about the main faults that may occur in an electrical power network, Measurement devices and reduction of electrical quantities characterising different faults (current transformer, voltage transformer, impedance measurement, power measurement, symmetrical current and voltage component filters, etc.), Generalities about protection (Definitions; Selectivity; Sensitivity; Speed and reliability), Amperometric and volumetric protections, Selectivity mode.
Chapter 2. Review of Symmetrical Components and Fault Currents (3 weeks)
Definition of symmetrical components, transformation of load impedances into symmetrical components, symmetrical components of'series' impedances, single-phase equivalent diagrams of sequence networks for rotating machines, expression of apparent power in symmetrical components, equivalent diagrams (positive, negative, and zero sequence), and relationships for different types of faults.
Chapter 3. Elements of the Protection System: (3 weeks)
Basic structural model, Technology operation and applications of different types of relays (Current relays, voltage relays, differential current relays, directional power relays, distance relays, etc.), Voltage and current transformation.
Chapter 4. Protection of Network Elements: (5 weeks)
Protection of alternators and motors; Protection of busbars; Protection of transformers; Protection of lines, distance and differential protection.
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1. Hadi Saadat, Power system analysis, Edition 2, 2004.
2. Furan Gonon, Electric Power distribution system engineering, Edition 1980.
3. Christophe Prévé, Protection des réseaux électriques, Hermes Paris 1998.
4. S. H. Horowitz, A. G. Phadke, Power System Relaying, second edition, John Wiley & Sons 1995.
5. L. Féchant, Appareillage électrique à BT, Appareils de distribution, Techniques de l’Ingénieur,traité Génie électrique, D 4 865.
6. S. Vacquié, A. Lefort, Étude physique de l’arc électrique, L’arc électrique et ses applications,Tome 1, éd. du CNRS 1984.
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