Impact Study of the Photovoltaic Generation Entrance in a Dealership Network

Currently, in Brazil and in the world, there has been a great diversification of sources that make up the energy matrix. Efforts are being made to replace polluting sources by clean sources, such as: wind, solar, biomass, etc. As there is already a resolution and government policies that enable and encourage the entry of distributed generation (DG), its participation in generation tends to increase continuously. With a favorable scenario of DGs, studying the potential of its entry into a region, as well as assess the impact that this would cause in the distribution system, it is necessary to prevent and perform more reliable planning. Then the focus of this article is to perform an analysis of how to behave to a dealership network, in southern Brazil, whereas photovoltaic generation entries in your distribution network. That is, simulations will be done during periods, such as weekdays, to examine the curves of loads of feeders, mains voltage profiles, among other dimensions to find out if there were problems on the network, such as: periods of overload, under voltage or overvoltage, etc. The modeling of the elements that make up the network, loads and simulations are developed in OpenDSS software. For the definition of the installed power in each DG, as well as of the daily profiles of generation, are used typical curves of solar generation and also curves generated from measurements of systems of tests installed in the region. This study verifies how the distribution system of the concessionaire behaves with the insertion of several units of DG. Knowing that the generation of solar energy is variable and difficult to predict, the generation curves adopted for simulations contemplate the most probable scenarios of occurrence. The approach taken in this work is promising and necessary for the concessionaire to be able to carry out more reliable plans in the short, medium and long term. In addition, it also allows identifying which investments in distribution networks must be made to adapt them to this new scenario that has been established in the electric sector.