Abstract

Abstract Repowering is a sustainable option for relatively old hydroelectric plants. However, it is still in the process of developing its technical, socio-environmental and regulatory aspects in Brazil. Moreover, there are few papers available in the literature on the subject. A gap in the area is the lack of methodologies that direct the measurement of benefits in suitable enterprises, to prioritize the most opportune ones, reduce risks, and encourage this practice nationally, regionally, and among agents. This paper presents a theoretical discussion of the practices currently employed and proposes an accessible method (simple, fast and low cost) to support decision-making regarding the applicability of repowering in small hydroelectric plants. The results show the environmental sustainability of the practice given the limitations and challenges that currently involve the construction of large hydroelectric plants.

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