Integração de geração eólica e fotovoltaica: análise sob aspectos de fluxo de potência e curto-circuito

Abstract

In the electrical energy production scenario, it is common to see an integration of two kinds of energy sources for power plant energy generation. In Brazil, for example, Small Central Hydroelectric Dams (Pequenas Centrais Hidrelétricas - PCHs) integrate energy to supply the demand of wind farm’s energy generation. However, wind farms in Brazil usually are located where hydric resources are scarce. On the other hand, within the entire Brazilian territory, the solar resource available is significantly abundant. In this sense, a cogeneration between eolic and solar photovoltaic power plants would present characteristics of an increase in generated energy through a better use of available eolic and solar resources. The proposal of this paper is to verify the viability of utilizing the available solar resources of a specific region, to implement a photovoltaic power plant connected to the same system of an existent wind farm. An electrical systems program was utilized to obtain results in which real data of photovoltaic and eolic generation structures, distribution and transmission of energy was inputted. Then, it was evaluated how this integration would influence the generated energy, the voltage, the electric currents of the system operation, and in the magnitudes of short-circuit currents. To that effect, a photovoltaic generation of approximately 5 and 10 MW was implemented to a wind farm of approximately 30 MVA, in the state of Rio Grande do Norte, without compromising the electrical structure of the existing wind power farm system.