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A Novel MDL-based Compression Method for Power Quality Applications

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4 Author(s)
Ribeiro, M.V. ; Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA ; Seop Hyeong Park ; Romano, J.M.T. ; Mitra, S.K.

This paper introduces a novel source coding method for voltage and current signals, called fundamental, harmonic and transient coding method (FHTCM), which is a generalization of the enhanced disturbance compression method (EDCM). The proposed method makes use of notch filtering-warped discrete Fourier transform (NF-WDFT) technique for estimating the parameters (amplitude, frequency, and phase) of the fundamental and harmonic components acquired from power lines so that only the transient components are compressed with wavelet transform (WT) coding technique. For the WT-based compression of transient components, we formulate a minimum description length (MDL) criterion, taking into account the selection of wavelet bases in a dictionary, wavelet decomposition structure, and quantization. Computational simulations have verified that the proposed method outperforms the EDCM as well as the traditional WT-based compression techniques

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Power Delivery, IEEE Transactions on  (Volume:22 ,  Issue: 1 )