A new frequency tracking and phasor estimation algorithm for generator protection

D ~ g g~ene~raltor protection is a complex and cult p r o b ~An~al~og and solid state methods have been successful to generator protection in the past and i of these functions in a digital device is a nd. This paper explores a new method to imp~ement frequency tracking and phasor estimation in a numerical relay. A new aIgorithm is utilizes a variable window DFT for ng. Use of the Discrete Fourier Transform (DFT) to compute the phasor estimates at a freq~encyo ther than the assumed frequency is outlined first. Next, a new ~ c h ~ foqr t~raceki ng the frequency is outlined. The paper concludes with testing of the new algorithm.