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- W1559622729 abstract "Recognition of power quality events by analyzing voltage waveform disturbances is a very important task for power system monitoring. This paper presents a hybrid intelligent scheme for the classification of power quality disturbances. The proposed algorithm is realized through three main steps: feature extraction, feature selection and feature classification. The feature vectors are extracted using S-transform ST and Wavelet transform WT which are very powerful time-frequency analysis tools. In order to avoid large dimension of feature vector, three different approaches are applied for feature selection step, namely Sequential Forward Selection SFS, Sequential Backward Selection SBS and Genetic Algorithm GA. In the next step, the most meaningful features are applied to Probabilistic Neural Network PNN as classifier core. Various transient events, such as voltage sag, swell, interruption, harmonics, transient, sag with harmonics, swell with harmonics, and flicker, are tested. Sensitivity of the proposed algorithm under different noisy conditions is investigated in this article. Results show that the classifier can detect and classify different power quality signals, even under noisy conditions, with high accuracy." @default.
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- W1559622729 date "2015-01-01" @default.
- W1559622729 modified "2023-09-27" @default.
- W1559622729 title "A hybrid method based on time frequency analysis and artificial intelligence for classification of power quality events" @default.
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- W1559622729 doi "https://doi.org/10.3233/ifs-141401" @default.
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