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- W1996274616 abstract "The nonlinear characteristics of magnetization of a current transformer (CT) can cause waveform distortion in the secondary current, which may result in malfunction of protective relays. This phenomenon is known as CT saturation. The accurate saturation detection, by the use of digital signal processing techniques applied to secondary current, plays an important function in solving the problems caused by the saturation. This paper presents a new method of saturation detection, based on the first difference of the low noise Lanczos filter. The formulation of the adaptive threshold according to the level of the SNR is presented and the detection algorithm is implemented, tested and compared with the third difference function method. The tests were performed using distorted secondary current signals generated by the RTDS (Real Time Digital Simulator) and corrupted by several levels of White Gaussian Noise (WGN). The results showed a high detection capability of the proposed algorithm regardless the CT characteristics, the secondary burden and the fault characteristics. Additionally, the method showed to be robust against noise up to 40 dB SNR and suitable for real-time implementation." @default.
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- W1996274616 date "2014-07-01" @default.
- W1996274616 modified "2023-09-27" @default.
- W1996274616 title "A new method of current transformer saturation detection in the presence of noise" @default.
- W1996274616 doi "https://doi.org/10.1109/pesgm.2014.6939544" @default.
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