XU Lin, FU Zheng-cai. Application of Digital Filtering Technology to the Measurement of Impulse Current with Rogowski Coil[J]. High voltageapparatus, 2004, (4): 262-263+266.
XU Lin, FU Zheng-cai. Application of Digital Filtering Technology to the Measurement of Impulse Current with Rogowski Coil[J]. High voltageapparatus, 2004, (4): 262-263+266.DOI:
Rogowski coil can be used for the measurement of impulse current.But it is liable to be disturbed if the current to be measured is low.This paper discusses how to improve the performance of the self-integrated Rogowski coil with signal digital filtering technology for such measurement.Three digital filtering methods—— — direct FFT threshold method
FIR equiripple filter and wavelet transform method are applied in de-noising of the output of the Rogowski coil.Comparisons of their de-noise performances show that the wavelet transform method is the most effective.