Power System Protection

Participants join this course to clearly understand how power systems are protected and kept safe in real life, not just in textbooks. The course explains concepts in a simple and practical way, showing how protection schemes actually work in Indian power networks. Students learn the basics of protection, modern relays, and how different parts of the system work together during faults. This knowledge is very useful for careers in power utilities, transmission and distribution companies, power plants, EPC companies, and grid operation jobs. The course also helps students preparing for GATE, higher studies, and research. Overall, it prepares learners with practical, job-oriented skills to handle today’s challenges such as complex grids, renewable energy integration, and reliable power supply.

• Introduction to power system protection – purpose, need, and role of protection in reliable power system operation

• Types of faults and their effects – classification of faults and impact on currents, voltages, and stability

• Protection components & zones – relays, CTs, VTs, circuit breakers, and zone-wise protection concept

• Review of fault analysis – use of symmetrical components for unbalanced fault calculations

• Basics of numerical relays – evolution from electromechanical to digital relaying and advantages

• Phasor estimation techniques – DFT, half-cycle DFT, recursive methods, and cosine filters

• Accuracy issues in measurements – effects of noise, frequency deviation, and decaying DC offset

• Overcurrent relay principles – pickup current, time–current characteristics, and relay coordination

• Directional overcurrent protection – need, operating logic, and application in interconnected systems

• Power swing phenomena – understanding power swings and methods to distinguish them from faults