Estimação de harmônicos e inter-harmônicos em sistemas elétricos.

Abstract

This work is intended to propose a methodology for harmonic and inter-harmonic analysis. For this purpose, it has been developed a novel frequency estimator, namely Modi ed Prony's method, which has been matched to a Kalman lter. The Modi ed Prony's method has been inspired upon the classic Prony's method. In the proposed methodology, the sinusoids ampli- tudes of data signals are estimated by the Kalman lter. The lter regressors are built through the frequencies estimated by the Modi ed Prony's method. It has also been proposed a FIR l- tering technique which minimize the Modi ed Prony's method noise sensibility. Besides, it has been proposed a criterion for estimating the model order of data signals. Finally, a comparative study between the Kalman lter and the weighted least-squares algorithm has also been ac-complished. The proposed techniques have been applied to both synthetical and experimental signals.