Análise de Transitórios Eletromecânicos no Sistema Elétrico de Potência com Presença de Fontes Renováveis Considerando Uso de Sistema de Armazenamento de Energia

Abstract

Renewable energy sources have reached increasingly higher levels of penetration into the electrical system, with emphasis on wind and solar photovoltaics. There are several advantages, however, its stochastic characteristic imposes great uncertainties related to the operation, stability and reliability of the system. When inserted in a large proportion, these sources alter the pattern of the network's behavior both in a permanent regime and in the event of disturbances. Thus, as the level of penetration of these sources grows, new efforts become necessary to keep the system operating within the standard limits. In view of the many alternatives proposed to favor the orderly growth of the intermittent sources in question, the energy storage system is of great importance today because it acts to mitigate many of its adverse impacts and contributes to the stabilization of the system. In this context, the present work aimed to carry out a stability study through the analysis of electromechanical transients in a transmission system with the presence of wind and solar generation. An energy storage with batteries coupled to the solar plant was designed and implemented as an alternative to mitigate impacts caused by variations in power. The study was developed from computational modeling considering simulations in the time domain with the Matlab® & Simulink® software where varied case studies made it possible to replicate different operating conditions in the electrical system and investigate its behavior both in normal operation and in disturbance situations. The results made it possible to assess the robustness and stability capacity of the electricity grid and also the performance of the storage system in dampening the impacts of renewable generation on the transmission network.