Posters

Abstract

Constrained-off is a significant challenge faced by wind farms, where power generation is restricted due to limitations in transmission capacity or system demand. This restriction results in economic losses and operational inefficiencies, representing an obstacle to the full utilization of renewable energy potential. A promising solution to mitigate this problem is the storage of excess energy in battery energy storage systems (BESS), allowing its injection into the grid during periods of low generation and absence of restrictions.  This study examines the feasibility of a battery energy storage system (BESS) for three wind farms located in Rio Grande do Norte and Bahia, Brazil. The constrained-off behavior at these plants was analyzed to size their BESS, aiming to capture and store the excess energy generated during periods of high production and restriction. The economic feasibility analysis compared the implementation and operation costs of the BESS with the economic losses associated with constrained-off. Although the results indicate that the proposed solution still faces challenges in terms of direct economic competitiveness, the study delves into a sensitivity analysis to identify more advantageous scenarios that may increase the system's feasibility. In the Brazilian context, with its interconnected electrical system, the use of BESS is particularly beneficial for the system operator, as it allows for a flat generation, which mitigates short-term generation predictability issues and reduces power deficits. This improves the overall management of the electrical system, especially relevant as the integration of intermittent renewable sources has intensified in Brazil in recent years.