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ECE 581 Electric Power System Protection

3 Credit Hours

Protection systems used to protect the equipment in an electric power system against faults, fault analysis methods, basic switchgear used for protection, basic protection schemes, such as overcurrent, differential, and distance protection and their application. To introduce the current industry practice, the course will have a few guest lecturers from industry.


Power System Analysis (NC State ECE 451)

Course Outline

This course will cover the basic protection schemes that are used to detect and interrupt the faults in a power system. The course outline is as follows:

  1. Fault Current Analysis in a Power System
  2. Fault Current Interruption Devices: Circuit Breakers and Fuses
  3. Operating Principles of Relays
  4. Over Current Relaying Based Protection
  5. Distance Relays for transmission line protection
  6. Differential Relays for protection of transformers
  7. Machine protection
  8. Wide Area Monitoring and Protection

Course Requirements

Grading :

Homework: 20%
Mid-term Exam: 30%
Final Exam: 50%


Power System Relaying by Stanlley Horowitz & Arun Phadke, published by Wiley.

Reference: Power System Analysis by John Grainger & William Stevenson, published by McGraw Hill.

Updated 11/22/2022