Artículos de revistas
Harmonics Measurement With a Modulated Sliding Discrete Fourier Transform Algorithm
Fecha
2014-04Registro en:
Orallo, Carlos Martin; Carugati, Ignacio; Maestri, Sebastian Oscar; Donato, Patricio Gabriel; Carrica, Daniel Oscar; et al.; Harmonics Measurement With a Modulated Sliding Discrete Fourier Transform Algorithm; Institute of Electrical and Electronics Engineers; Ieee Transactions On Instrumentation And Measurement; 63; 4; 4-2014; 781-793
0018-9456
CONICET Digital
CONICET
Autor
Orallo, Carlos Martin
Carugati, Ignacio
Maestri, Sebastian Oscar
Donato, Patricio Gabriel
Carrica, Daniel Oscar
Benedetti, Mario
Resumen
Accurate harmonics estimation has become a key issue in power quality assessment. This paper deals with a discrete Fourier transform (DFT)-based measurement technique,which can be easily employed to accurately determine theharmonic components of a distorted signal, i.e., voltage or current. The proposed method is based on a modulated sliding DFT algorithm, which is unconditionally stable and does not accumulate errors due to finite precision representation, and a variable sampling period technique (VSPT) to achieve a frequency adaptive mechanism. It is worth noting that the VSPT changes the sampling period for a variable grid frequency condition, leading to a constant sampling frequency under steady-state conditions. The proposed method provides: 1) high degree of accuracy; 2) structural/performance robustness; and 3) frequency adaptability. Given the modular nature of the method, it is implemented on a field programmable gate array. Simulations and experimental tests are shown to verify the performance of the proposed method.