Influence of ADC nonlinearly on the measurement error of the active power to code converter

Influence of a form of nonlinearity of ADC transfer function on a measurement error of active power is considered. The comparative analysis of methods of an assessment of a measurement error of active power is made by the presence of ADC integral nonlinearity. Conditions for nonlinearity, under which the measurement error of active power is maximum, are revealed. It is shown that the method based on use of the polynomial approximation of ADC transfer function, gives smaller (in comparison with other methods) overestimate of an assessment of an error. Reliability of the received analytical expressions is confirmed with results of the imitating modeling executed with the Matlab.