The paper investigates the performance of recently proposed frequency estimation methods in the presence of typical power system measurements disturbances, i.e. sinusoids and additive noise. The tests are conducted for the polyphase Prony method, the polyphase smart DFT, and the discrete-time frequency-gain transducer. Considered methods are capable of unbiased one-cycle frequency estimation. The robustness against disturbances is obtained by the application of the proposed prefilter. Consider methods with the initially filtered measurement signal perform significantly better than the standard PMU (phasor measurement unit) P class and M class signal processing models.
