Title :
Accuracy of a DFT phasor estimator at off-nominal frequency in either steady state or transient conditions
Author :
Belega, Daniel ; Petri, Dario
Author_Institution :
Fac. of Electron. & Telecommun., Politeh. Univ. of Timisoara, Timisoara, Romania
Abstract :
The paper analyzes the effect of harmonics and wideband noise on the accuracy of the phasor estimator provided by the Discrete Fourier Transform (DFT) at off-nominal frequency when a decaying dc offset component is either absent or present in the acquired signal. The analysis, performed through both computer simulations and experimental results, shows the high sensitivity to transient conditions of the DFT-based phasor estimator algorithm.
Keywords :
discrete Fourier transforms; power transmission; DFT phasor estimator; computer simulations; discrete Fourier transform; off-nominal frequency; power transmission systems; steady state conditions; transient conditions; Accuracy; Discrete Fourier transforms; Frequency estimation; Harmonic analysis; Harmonic distortion; Signal to noise ratio; Decaying dc offset; Discrete Fourier Transform (DFT); off-nominal frequency; phasor estimation;
Conference_Titel :
Smart Measurements for Future Grids (SMFG), 2011 IEEE International Conference on
Conference_Location :
Bologna
Print_ISBN :
978-1-4577-1313-2
DOI :
10.1109/SMFG.2011.6125759