Projeções para expansão da transmissão e impactos da inserção de um reator na subestação Morro do Chapéu II

Abstract

The expansion of electric power transmission represents a crucial element for the Power System. Sector organizations such as the Empresa de Pesquisa Energética (EPE) and the Operador Nacional do Sistema Elétrico (ONS) constantly study this process, resulting in the development of documents like the PDE (Plano Decenal de Expansão de Energia) and the PET/PELP (Programa de Expansão da Transmissão e Plano de Expansão de Longo Prazo). These documents provide an important insight into the future of the electrical sector, assessing the impact of incorporating new assets, such as transmission lines and transformation equipment, focusing on the reliability of the Sistema Interligado Nacional (SIN). The work encompasses the evaluation of procedures related to the planning studies of electric power transmission systems expansion in Brazil, particularly in steady-state studies (power flow and contingency studies). The main goal is to analyze the effects of including a new controllable shunt reactor at the Morro do Chapéu II Substation, addressing the expansion of renewable generation in the Central-North mesoregion of Bahia. Methodologically, the requirements of ONS Network Procedures were studied and strategies for simulation were developed using the Programa de Análise de Redes (ANAREDE). The main findings indicate that, in all simulation scenarios, with or without contingencies, the system assets can support the demands imposed by continuous operation scenarios without exceeding acceptable limits for any variables. Moreover, simulated contingencies indicated that non-simultaneous line losses have minimal impact on system operation due to the system's ring connection topology. Additionally, the implementation of the controllable shunt reactor proved effective as a mitigation measure, reducing the operation close to the voltage limits at the subsystem bars, emphasizing its operational safety