Power system protection is a specialized field within electrical engineering focused on the principles, design, and application of systems intended to detect and rapidly isolate faults or abnormal operating conditions within an electric power network. As an academic concept and research discipline, it investigates the behavior of power systems under stressed conditions, the development of intelligent protective relaying algorithms and hardware, and the systematic coordination of protection schemes to ensure speed, selectivity, reliability, and security of operation. Its significance is foundational to the stable, safe, and continuous operation of modern power grids, preventing extensive equipment damage, minimizing service disruptions, and ensuring public safety.