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2 Przegląd Elektrotechniczny

2 2012

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The Feature Selection based Power Quality Event Classification using Wavelet Transform and Logistic Model Tree

Eristi H., Demir Y.

Przegląd Elektrotechniczny

2012

R. 88, nr 7a

43-48

This paper presents a new power quality event classification technique using wavelet transform and logistic model tree. The proposed method uses the samples of three cycle duration of three line voltage of power quality events. The features of these samples are obtained by using the wavelet transform and a few different feature extraction techniques. The sequential forward selection method based a feature selection process is done to ensure good classification accuracy by selecting 20 better features from all 90 features generated from the wavelet transform coefficients. The obtained features are used to train a single logistic model tree. The feasibility of the proposed algorithm has been tested using real life power quality events. The result indicates that the feature selection based proposed method reliably classifies all types of power quality events with high accuracy.

W artykule zaproponowano nową metodę oceny jakości energii wykorzystującą transformatę falkową i logistyczny model drzewa. W metodzie analizuje się trzy cykle w trzech liniach napięcia. Możliwa jest klasyfikacja 90 zdarzeń i wybranie 20 typowych cech.

Assessment of power quality terms on energy distribution systems: a case study of Istanbul

Kekezoglu B., Bozkurt O., Arikan O., Kocatepe O., Yumurtaci R., Baysal M.

Przegląd Elektrotechniczny

2012

R. 88, nr 11a

157-160

Power quality is the most import concern for electrical power distribution systems. The power quality terms have become more harmful In common increasing end-use equipments that have non-linear current-voltage characteristic on energy distribution systems. In this study, Power quality terms are investigated on energy distribution systems, Also, as a case study, power quality measurements are shown on Istanbul Electrical Power Distribution System. The measurements conducted under The Power Quality National Project.

W artykule omówiono analizę jakości energii w sieci energetycznej, na podstawie systemu dystrybucji energii elektrycznej Stambułu ang. Istanbul Electrical Power Distribution System).