Spectral estimation technique for nonstationary signals of power systems

Author

Adamo, Francesco ; Cavone, Graziana ; Di Nisio, Attilio ; Savino, M. ; Spadavecchia, Maurizio

Author_Institution

Dept. of Electr. & Inf. Eng., Politec. di Bari, Bari, Italy

fYear

2014

fDate

12-15 May 2014

Firstpage

654

Lastpage

658

Abstract

In this paper a method for estimating the spectral content of frequency modulated waveforms is presented. The method is intended to estimate harmonics and interharmonics of power line signals where, as known, the frequency of the fundamental component (50 Hz or 60 Hz) slightly changes over time. It is based on the non-uniform resampling of the harmonic functions that are usually used in the DFT as a base to analyze signals. The non-uniform sample period is provided by an instantaneous phase detector.

Keywords

discrete Fourier transforms; power cables; power measurement; power supply quality; power system harmonics; signal sampling; DFT; discrete Fourier transform; frequency 50 Hz; frequency 60 Hz; instantaneous phase detector; nonstationary signals; nonuniform harmonic function resampling; power line signal harmonics estimation; power line signal interharmonics estimation; power measurement; power quality analysis; power system harmonics; spectral content estimation technique; Discrete Fourier transforms; Estimation; Frequency estimation; Frequency modulation; Power measurement; Data acquisition; Power measurement; Power quality; Power system harmonics; Signal sampling; Spectral estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International

Conference_Location

Montevideo

Type

conf

DOI

10.1109/I2MTC.2014.6860824

Filename

6860824