Fundamental Component Phasor Estimation in Presence of DC Exponential Decay, Harmonics and Noise

[摘要] Phasor estimation of the fundamental component is a necessary task for many power system applications. This work is targeted to applications of transmission lines protection during low impedance fault, when a DC exponential decaying component appears in the signal in addition to the fundamental, harmonics and noise components. The proposed phasor estimation methodology is robust against noise and reduces or eliminates the influence of all other undesirable components using digital signal processing techniques as windowing, modulation, Fourier transform, look-up-tables, and parameter estimation. These techniques also allow its implementation into a reconfigurable hardware platform, such as field programmable gate array, using fixed point arithmetic...

[学科分类] 自动化工程

[关键词] Phasor estimation ;DC exponential decaying ;Fourier transforms