Estudo sobre utilização de usinas hidrelétricas reversíveis com bombas alimentadas por geração eólica para melhoria do despacho hidrotérmico

Abstract

The need to diversify the Brazilian energy matrix is of great importance, since the reduced incidence of rain brings an extensive crisis in the country's energy security. In addition, there is a growing use of intermittent sources in the system that, in times of greater energy availability, the power generated by these sources could be stored. One way to accumulate this energy would be with the use of Reversible Hydroelectric Power Plants (UHRs). These plants pump water from a lower reservoir to the upper one through the use of pumps. In this way, the generated energy is stored in the form of gravitational potential energy. This application has not yet been implemented in Brazil and, therefore, they have some challenges to be overcome before they can operate in the system. This work presents a preliminary study that compares three scenarios of Generation costs of the Northeast subsystem, the first without the insertion of UHRs, the second with the insertion of reversibles when there is excess generation and the third scenario with the constant operation of the UHRs throughout the day, in order to verify the possible impacts of the presence of these generators and the best cases for the application of Reversible Hydroelectric Power Plants in the National Interconnected System.