Optimal location of shedding load at the adaptive UFLS

Under Frequency Load Shedding, UFLS, is the last step and the most extreme in protecting electric power systems from black outs and severe damages. Load shedding relays are installed at constant locations in the system. These locations are usually substations feeding less important loads. This lack of intelligence in selection of the loads to be shed may result in some problems for the power system after the disturbance. An adaptive selection of load to be shed is suggested using the benefits of wide area protection. The simulation results demonstrate a considerable advantage in minimizing load to be shed.