Control del perfil de voltaje y mejora del factor de potencia coordinando generadores distribuidos con un cambiador de tomas bajo carga en un sistema de distribución

Abstract

In distribution systems the On-Load Tap Changer (OLTC) is essential for the regulation of high or low voltage profiles, but its conventional regulation philosophy is affected by the presence of distributed generation (DG), producing constant fluctuations in voltage magnitudes. Therefore, in this article we propose to change the conventional operation of the OLTC based on a fixed magnitude at the substation busbar to a multivariable system that controls the voltage level as a function of the average voltage of the entire distribution network. In addition, the OLTC is coordinated with the reactive power import/export capabilities of the distributed generators (GDS) for point-of-connection (POC) voltage regulation and system power factor improvement. Such modeling was developed in Matlab Simulink software, on a 13-bus IEEE system. The results obtained show that the proposed system can successfully control the voltage and simultaneously improve the power factor.