Lecture Notes on Power System Protection
Introduction
- Importance of Power System Protection
- Possibility of Faults and the need for their management
Overview of the Course
- Previously covered units:
- Transmission
- Distribution
- Fault Analysis
- Stability
- Next unit: Protection
- Revision of the previous power system
Function of Power System Protection
- Be prepared for faults and issues
- Remove faulty equipment from the system
- Safeguard generators and transformers
Protective Schemes
- Protective Relay: Identifies faults and notifies the circuit breaker
- Circuit Breaker: Removes the fault
- Operates at minimum fault current
- Designed for maximum fault current
Types of Equipment
- Fuse
- Function: Melts the wire if the current increases
- Dependence on length and voltage
- Load Interrupter
- Disconnects the load if it exceeds the rated load
- Line Isolator
- Creates a gap to prevent arc formation
- Circuit Breaker
- Most important switch for fault clearing
- Operates as per relay instructions
Arc Phenomena
- Formation of the arc and ways to control it
- Nature of arc: self-sustaining
Fault Clearing Time
- Relay Operating Time
- Circuit Breaker Operating Time
- Arcing Time
- Calculation of Fault Clearing Time
Conclusion
- Discussion on the importance of power system protection and equipment
- Teaching methods and study planning
- Proper selection of equipment to ensure the highest safety
Additional Information
- Unacademy app and code: Ankit ESE
- Upcoming batches and paid courses
These notes will be helpful in your studies. Please study from here and focus on the key points.