International Journal of Electrical Electronics & Computer Science Engineering (IJEECSE)
Adaptive Under-Frequency Load Shedding (UFLS) scheme is a reliable and accurate method to maintain the frequency of the system in accessible limit by shedding the right amount of load from system during abnormality. This paper is to review work carried on adaptive UFLS. It consists of combination of under frequency relay and Rate of Change Of Frequency (RCOF) relay. During the abnormal condition, the frequency of system deviates below from its normal value. To bring back the frequency to their normal load shedding is only reliable method.