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Exponential fitting algorithms for digitally recorded HV impulse parameter evaluation

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3 Author(s)
Li, Y.M. ; Xi''an Jiaotong Univ., China ; Kuffel, J. ; Janischewskyj, W.

Standard analysis of high voltage impulses comprises determination of parameters describing the recorded impulses. These include peak value, front time, and time to half-value. This paper describes several fitting algorithms intended to facilitate extraction of these parameters from recorded data. These algorithms were used to fit bi-exponential models to smooth lightning and switching impulses, to lightning impulses having oscillatory fronts or peaks where the evaluation of the waveform parameters is based on the construction of a smooth curve, and to tail-chopped lightning impulses. The overall effectiveness of these algorithms and their influence on parameter estimates are presented and discussed

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Power Delivery, IEEE Transactions on  (Volume:8 ,  Issue: 4 )