ee 445 course presentation power system protection mohammed al-zeer 224026
TRANSCRIPT
EE 445Course Presentation
Power System Protection
Mohammed AL-Zeer224026
Outline• Introduction • Power System• Power System Protection• Relays• Conclusion
Introduction• How much it will cost to build a
substation?
Introduction
• How much it will cost to construct 1 km of T.L ?
Introduction
• How much it will cost to buy a large generator?
Introduction
25%
Power System
Power system Protection
• Transducer• Circuit breakers• Protective relays
Transducer
• sensor & transformer• Current transformer (CT) & Potential transformer (PT)
Circuit Breakers
• Mechanical device• Energize & interrupt electric
circuits
Protective Relays
• Receive signals from transducers &
Control circuit breakers
Protection Systems
• Main protection• Backup Protection
Zones of Protection
Requirements of Protection Systems
• Speed• Selectivity• Reliability• Sensitivity
Types of Protective Relays
• Over-current Relays• Differential Relays• Percentage-Differential Relays• Directional Relays
Over-current Relays
Types of Protective Relays
• Over-current Relays
• Differential Relays• Percentage-Differential Relays• Directional Relays
Differential Relays
Types of Protective Relays
• Over-current Relays• Differential Relays
• Percentage-Differential Relays• Directional Relays
Types of Protective Relays
• Over-current Relays• Differential Relays• Percentage-Differential Relays
• Directional Relays
Application
Conclusion
References
• Electromechanical Energy Devices And Power Systems (EE 360)
• Power System Relaying (EE 466)
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