Non-stationary power signal processing for pattern recognition using HS-transform

Authors:
B. Biswal;P. K. Dash;B. K. Panigrahi
Affiliations:
Silicon Institute of Technology, Silicon Hills, Patia, Bhubaneswar 751024, Orissa, India;Center for Electrical Sciences, Bhubaneswar, India;Indian Institute of Technology, New Delhi, India
Venue:
Applied Soft Computing
Year:
2009

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Abstract

A new approach to time-frequency transform and pattern recognition of non-stationary power signals is presented in this paper. In the proposed work visual localization, detection and classification of non-stationary power signals are achieved using hyperbolic S-transform known as HS-transform and automatic pattern recognition is carried out using GA based Fuzzy C-means algorithm. Time-frequency analysis and feature extraction from the non-stationary power signals are done by HS-transform. Various non-stationary power signal waveforms are processed through HS-transform with hyperbolic window to generate time-frequency contours for extracting relevant features for pattern classification. The extracted features are clustered using Fuzzy C-means algorithm and finally the algorithm is optimized using genetic algorithm to refine the cluster centers. The average classification accuracy of the disturbances is 93.25% and 95.75% using Fuzzy C-means and genetic based Fuzzy C-means algorithm, respectively.