Analysis of the impact of the insertion of distributed generation in the electric grid based on impedance, voltage and power factor

Abstract

This work consists of an analysis of the sensitivity of points of common coupling (PCCs) against the insertion of distributed generation (DG), by modeling circuits based on Kirchhoff’s Laws, Ohm’s Law, admittance matrix and using sources of ideal currents that characterize the DG to propose sensitivity indexes for voltage and impedance of each PCC. This study evaluates the influence of DG on the voltage levels of systems with 16 PCCs, calculating the admittance matrix of this system in the MATLAB software. Variations in the load, in the grid impedance and in the power factor (PF) of the DGs were considered to evaluate voltage variations. The results show the analysis of the impact of the DGs on the grid without the need to perform simulations, using the indexes proposed.