IEEE Current Transformer Saturation Detection By Wavelet Transform and Compensation By Newton’s Forward Interpolation..pdf下载

Abstract--Protective systems require a faithful reproduction of primary current on the Current Transformer (CT) secondary side. Saturation is a common problem in a steel core CT. Saturation problem causes dreadful effects in the protection systems. This paper presents a simple solution towards detection and compensation of currenttransformer saturation problems. This paper describes a method in which CT saturation is detected by Wavelet Transform (WT) based Multi-resolution Signal Decomposition (MSD) technique and the compensation of saturated signal is done by Newton’s Forward Interpolation. Various case studies are made and the results obtained are very encouraging.