Measurement Uncertainties of Impulse Parameters Due to Nonideal Step Responses of High-Voltage Dividers

Using the new definitions and analysis specified in the 2010 version of the IEC standards to calculate impulse parameters, this paper investigates the measurement errors and uncertainties of high-voltage impulse dividers due to their nonideal step response using the convolution method. Measured step responses of three different dividers and a range of practical impulse waveforms were used in the calculations. The obtained results indicate, for the first time, that the uncertainty contribution of a nonideal step response can be estimated with sufficient accuracy for the purpose of measuring practical impulse waveforms.