Relay Protection of Power Supply Systems
This course is about the basics of relay protection of power supply systems. The course introduces students to the requirements for relay protection, types of faults in power supply systems, instrument transformers for relay protection. The course has topics about analog and digital relay protection equipment, non-directional and directional overcurrent protections, differential protections, protections of transformers and power lines, basics of automation in power supply systems. To master the course, students need basic knowledge in the field of electrical engineering, transient processes in power supply systems, design and purpose of primary and secondary electrical equipment of substations. This course is the basis for the graduate work of students and for future professional activities in the field of electrical engineering.
The goal of mastering the discipline
Obtaining knowledge, skills and abilities in the field of design and maintenance of relay protection of power supply systems.
The skills you get
- understand and analyze the requirements for relay protections of power supply systems;
- calculate short-circuit currents to select the settings of overcurrent protection devices;
- select the appropriate composition of protection devices in accordance with the requirements of regulatory documents;
- calculate the setting parameters and check the sensitivity of relay protection devices for transformers and power lines;
- develop graphical documentation for the project of relay protection of the power supply system.
Topics covered
- 1. General issues of relay protection
- 2. Types of faults in power supply systems
- 3. Current transformers
- 4. Voltage transformers
- 5. Current and voltage sequence filters
- 6. Relays and terminals
- 7. Auxiliary power supplies for relay protection
- 8. Overcurrent protection
- 9. Overcurrent cutoff
- 10. Directional overcurrent protection
- 11. Earth fault protection
- 12. Differential protection
- 13. Relay protection of power supply system elements
- 14. Reserve in relay protection systems
- 15. Automation of power supply system elements
When instructed
- 4th year, 1st semester
List of references and sourses
- Protective Relaying: Principles and Applications – J. Lewis Blackburn, Thomas J. Domin
- Power System Protection – P. M. Anderson
- Power System Relaying – Stanley H. Horowitz, Arun G. Phadke
- Applied Protective Relaying by Westinghouse Electric Corporation
- Network Protection & Automation Guide by Alstom Grid
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