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Abstract
The effect of under frequency on generating units is a critical aspect of power system stability and reliability. Under frequency events occur when the frequency of an alternating current (AC) power system drops below its nominal value, typically 50 or 60 Hertz. This phenomenon can be triggered by various factors such as sudden load increases, generator tripping, or grid disturbances. Understanding how under frequency affects generating units is essential for maintaining the stability of power systems and preventing cascading failures. This paper provides an overview of the causes, consequences, and mitigation strategies associated with under frequency events on generating units. It examines how under frequency impacts the performance and safety of generating units, including increased mechanical stress, potential damage to equipment, and risk of instability in the power system. Various control and protection schemes are discussed to mitigate the adverse effects of under frequency events and ensure the continued operation of generating units within safe operating limits. Understanding the implications of under frequency on generating units is crucial for maintaining the reliability and resilience of power systems in the face of dynamic operating conditions and unforeseen disturbances. Key Words: Frequency, Power Generation, Stability, Grid and Renewable Energy