Error Correction Model of Lightning Impulse Voltage Using Deconvolution Techniques

Abstract:
In this paper, techniques based on deconvolution alongside the unit step response of a measuring system are utilized to correct lightning impulse voltage used in high-voltage withstand tests. A mathematical derivation of the techniques is presented and employed to mitigate the non-ideal influences of measuring instruments on recorded data. To mitigate the impact of undesired high-frequency noise associated with deconvolution, the transfer function of the error correction model is determined by fitting parameters derived from the unit step response of the measuring system under considera-tion. Additionally, a low-pass filter with an appropriate cut-off frequency is applied alongside the error correction model. The efficacy of this approach is illustrated through a practical example involving a measuring system. The effectiveness of the proposed techniques was evaluated through comparison with results obtained from a reference measuring system. The evaluated results indicate that the step response correction in the proposed techniques can significantly reduce the errors of lightning impulse voltage waveform parameters.