Title :
Harmonic analysis via wavelet packet decomposition using special elliptic half-band filters
Author :
Eren, Levent ; Ünal, Mehmet ; Devaney, Michael J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Bahcesehir, Istanbul, Turkey
Abstract :
The Fast Fourier Transform is the most widely used power system harmonic analysis tool in real little power metering due to its computational efficiency. Recently, an alternate method, wavelet packet decomposition, has been applied to power system signals to meter voltage and current harmonics. Although the new method provides better analysis, the computational complexity of wavelet packet decomposition places a limitation on its use in real time metering. This paper proposes the use of all-pass implemented half-hand elliptic IIR filters in the wavelet packet decomposition of power system signals. The proposed implementation reduces the computational complexity to levels comparable to Fast Fourier Transform.
Keywords :
IIR filters; all-pass filters; computational complexity; elliptic filters; power system analysis computing; power system harmonics; power system measurement; wavelet transforms; all-pass implemented IIR filters; computational complexity; current harmonics; dyadic wavelet decomposition; elliptic half-band filters; polyphase filter bank; power system harmonic analysis; real time metering; voltage harmonics; wavelet packet decomposition; Computational complexity; Computational efficiency; Fast Fourier transforms; Harmonic analysis; Power harmonic filters; Power system analysis computing; Power system harmonics; Voltage; Wavelet analysis; Wavelet packets;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE
Print_ISBN :
0-7803-8248-X
DOI :
10.1109/IMTC.2004.1351507