Details

Autor(en) / Beteiligte

• Platas-Garza, Miguel Angel
• de la O Serna, José Antonio

Titel

Dynamic Phasor and Frequency Estimates Through Maximally Flat Differentiators

Ist Teil von

• IEEE transactions on instrumentation and measurement, 2010-07, Vol.59 (7), p.1803-1811

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2010

Quelle

IEEE Xplore

Beschreibungen/Notizen

• Estimates of the dynamic phasor and its derivatives are obtained through the weighted least squares solution of a Taylor approximation using classical windows as weighting factors. This solution leads to differentiators with ideal frequency response around the fundamental frequency and to very low sidelobe level over the stopband, which implies low noise sensitivity. The differentiators are maximally flat in the interval centered at the fundamental frequency and have a linear phase response. Therefore, their estimates are free of amplitude and phase distortion and are obtained at once. No further patch is needed to improve their accuracy. Examples of dynamic phasor estimates are illustrated under transient conditions. Special emphasis is put on frequency measurements.