A novel approach to visualising power system harmonic trends is proposed. The Gabor transform technique, embedded with a Gaussian-like window function, is applied to help monitor harmonic variations in the time dimension. Using the proposed scheme, power system transient harmonics can be closely observed. The proposed method has been tested for the inspection of inrush current harmonics of transformers and industrial arc furnace disturbances. The results demonstrate the merits of the proposed method for the applications.
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Huang et al. (1996) studied this question.
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