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Fault Classification and Localization in Power Systems Using Fault Signatures and Principal Components Analysis

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Figure

Figure 2 represents a 3-phase system signals in the time three current signals from each phase are shown while part b is showing the diagram of the difference signal, from an unbalanced three-phase system
Figure 2. Unbalanced system signals: (a) each phase signal and (b) difference signal of current wave for phase a under a fault condition
Figure 3. A plot of the unique signature of phase a in a 3-phase system with a fault a-g only
Figure 5. The general framework for fault classification using principal component analysis as a tool for feature extraction of fault signatures
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