Estudo comparativo das teorias de potência instantânea e conservativa

Abstract

Due to the growth of non-linear loads in the electrical system, it was necessary to have power theories that could represent the physical disturbances of the network satisfactorily, so that they can be compensated. Over the years several power theories have emerged, some of which are the Instant Power Theory, known as pq theory, and Conservative Power Theory, known as the CPT theory. The purpose of this work is to perform the comparative study for the resistive, resistive-resistive-inductive and resistive-capacitive balanced loads, characterizing the decomposition of active, reactive and oscillating currents in the case of the pq theory and currents active balanced, reactive balanced and residual of CPT theory. It also analyzes plots of active, reactive, power related to oscillations and power factor. These analyzes are for 4 different types of load-feeding cases, which are balanced sinusoidal source, unbalanced sinusoidal, balanced non-sinusoidal and unbalanced non-sinusoidal. For the non-sinusoidal source cases, the 5th and 7th order harmonics are added to the source. For each case, there is a comparative analysis of power theories with all these factors in illustrations and root mean square values.