DSP Wavelet-Based Tool for Monitoring Transformer Inrush Currents and Internal Faults

作者：Gaouda A M^*; Salama M M A

来源：IEEE Transactions on Power Delivery, 2010, 25(3): 1258-1267.

DOI：10.1109/TPWRD.2010.2046653

• Inrush current
• internal faults
• Kaiser window
• multiresolution analysis
• transformer
• wavelet transform

This paper proposes a wavelet-based technique for monitoring nonstationary variations in order to distinguish between transformer inrush currents and transformer internal faults. The proposed technique utilizes a small set of coefficients of the local maxima that represent most of the signal's energy: only one coefficient at each resolution level is utilized to measure the magnitude of the variation in the signal. The data is processed while sliding through a Kaiser window and the technique has been applied in the laboratory as well as with simulated data, producing excellent results.

• 出版日期2010-7