A Novel PMU Anti-Spoofing Algorithm Based on Smart Grid Infrastructures

Phasor measurement unit (PMU) GPS receiver spoofing has been addressed in the recent literatures. Having spoofed GPS signals, the spoofer can inject bad data into power system control center and consequently the protection system will face serious problems. The existing anti spoofing techniques are all based on GPS signal analysis and are just able to detect spoofing. However, as PMUs are placed in optimum numbers, refining the bad data without any PMU outage is also an important case. It should be notified that some of the existing methods require additional infrastructures besides power grid infrastructures which are not economically attractive. In this paper, a novel anti spoofing algorithm has been proposed based on smart grid infrastructures. The algorithm is not only able to detect PMU GPS receiver spoofing, but also is able to refine counterfeit measurements. Vestigial signal analysis is also applied to remove fake signals. The defects of the existing anti spoofing algorithms have been discussed and the effectiveness of the proposed algorithm has been proved through simulation.