Impact of GPS Spoofing on Synchrophasor Assisted Load Shedding

Adaptive under frequency load-shedding schemes are gaining more attention, as power systems are being operated under increasingly stressed conditions. Synchrophasor devices are used in power system networks to monitor the system frequency and the rate of change of frequency (ROCOF) and hence can be utilized for adaptive load-shedding schemes. Since the synchrophasors utilize a global positioning system (GPS) to time synchronize their measurements, they are prone to time synchronization attack (TSA) by spoofing the GPS. This paper discusses the impact of TSA on synchrophasor assisted load-shedding schemes. WSCC 9-bus system is used as the test bed for the study.