Modernization of hydroelectric power plants and pumped-storage hydropower to strengthen stability and resilience of the electric grid in energy transition

Abstract

The global energy transition requires power systems that are increasingly flexible, resilient, and capable of integrating high levels of variable renewable generation. In this context, hydropower continues to play a strategic role as a backup technology to ensure the stability of the power grid. In Latin America, where more than 50% of hydropower plants have exceeded their design life, the modernization of existing assets represents a technical, economic, and environmental opportunity to increase system reliability without requiring major infrastructure developments. This article provides an overview of the role of hydropower repowering, the rehabilitation of existing plants, and pumped-storage hydropower (PSH) as key solutions for strengthening energy security, increasing operational efficiency, and facilitating the large-scale integration of renewable energy. It also highlights international projects carried out by Andritz Hydro and analyzes the prospects for Latin America within the new global energy landscape.