Measurement of reactive power under asymmetrical nonsinusoid modes of electric networks with earthed neutral

摘要

The article contains the analysis of opportunities to measure reactive power under asymmetrical nonsinusoid modes of three-phase networks with earthed neutral using classical and instantaneous power theories. It is shown that, under an insignificant mode asymmetry, one can apply any of powers. This being the case, the simplest way to carry out the measurement is to use the instantaneous power theory. With the increase in network mode asymmetry, it would be advisable to use the reactive power, which is based on the classical power theory.