A multiple deep attenuation frequency window for harmonic analysis in power systems

A novel window is presented and applied in electrical power system harmonic analysis. The goal of increasing the resolvability of low magnitude nonharmonic tones close in frequency to higher magnitude harmonics and the detectability of very low magnitude high frequency harmonics is pursued. The proposed window is derived from the Tseng window; its spectrum can be modeled in the synthesis stage and it is characterized by a narrow width main lobe and by sidelobes which are very low in correspondence to some specified frequencies. Numerical experiments demonstrate the performances and the usefulness of the new window in resolving periodic distorted waveforms in power systems