Influence of the nonlinearity of measurement transformers on effectiveness of module error correction

The article presents the program spectral line method of module error correction in linear input circuits. The method requires the knowledge of the frequency characteristics of the module errors and the phase errors of the input circuit to be corrected. The method was used for frequency error correction of measurement transformers applied in electronic power transducers. Such input circuits are nonlinear and distort the measured signals. The article presents the analysis of the influence of the nonlinearity of the input circuits upon the effectiveness of correction of frequency errors of the input circuit module at measurements of the root-mean-square value.