Published Paper Details:

An alternator is a vital component of a power generation system, and its reliable operation is essential for maintaining continuous power supply. Due to its high cost and importance, effective protection of an alternator against internal faults is necessary. Differential protection is one of the most reliable and widely used methods for protecting alternators from internal phase-to-phase and phase-to-ground faults. This protection scheme operates on the principle of comparing the current entering and leaving the alternator winding. Under normal operating conditions, the differential current is zero, but during an internal fault, a difference in current is detected, causing the relay to operate and isolate the faulty alternator from the system. This paper discusses the principle, working, advantages, and applications of differential protection of alternators. It highlights how differential protection ensures fast fault detection, minimizes damage, and improves the overall reliability and safety of power generation systems