Виявлення та оцінювання джерел спотворень якості електроенергії в розподільчих електричних мережах

Abstract

It is shown that in the asymmetric non-sinusoidal modes of electric networks, the pulsating power contains two components, which are due to asymmetry and nonsinusoidal stresses and currents. The constituents due to asymmetry are represented by instant conditional capacities of the reverse sequence. The constituents the power of distortion due to the non-sinusoidality is defined as the difference between the pulsating power and the instantaneous conditional power of the reciprocal sequence. Expressions are obtained to determine the reciprocal and distortion capacities in the integral and spectral recording forms. The expediency of the application of the system of generalized instant symmetric components and the basis of the conditional capacities of the reverse and zero sequences determined on their basis for the determination of consumers that distort the quality of the electric power is substantiated. Practically implemented automated monitoring system for electricity accounting with the function of detection and evaluation of the impact of nonlinear and asymmetric consumers on the deterioration of the quality of electricity.