Avaliação das metodologias para a atribuição das parcelas de responsabilidade sobre os desequilíbrios

Abstract

An ideal three-phase electrical system is expected to show sine-wave voltages with the same magnitude and 120° phase shifted from each other. However, in practice, the voltages and currents may present dissimilar behavior characterizing the so-called electrical system imbalance. Such phenomenon may occur due to a variety of non-ideal operational conditions found in both utilities and consumers. Given this scenario, at the point of common coupling between these two agents, the subject of sharing the responsibility of a given degree of imbalance emerges as a relevant topic within the context of the power quality indicators. Aiming at providing means to find the contribution from the mentioned agents, the literature presents a few methodologies to fulfil these needs. Although the recognition of published approaches on this subject, it must be stressed that, up to this moment, an acceptable methodology has not been proposed. Faced with this situation, this work is focused on the evaluation of the effectiveness of the procedures for the sharing of responsibilities on the imbalance.