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Contribution of floating photovoltaic systems in hydropower plants for the expansion of Brazilian electricity sector

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  • Raimundo, Danielle Rodrigues
  • Nakao Cavaliero, Carla Kazue
  • Pereira da Cunha, Marcelo

Abstract

The Brazilian electricity matrix is mainly composed of hydropower plants, which allow the storage of energy as water in reservoirs. However, the water crises experienced in recent years bring uncertainties regarding the reliability of this kind of energy storage. The present work proposes a study on the use of photovoltaic generation in floating panels in reservoirs of hydropower plants. Floating photovoltaic systems have been the subject of several studies, but there is still a lack of research regarding their technical feasibility, operational challenges, and environmental impacts. In Brazil, it is also necessary to understand the insertion of floating photovoltaic systems in the National Interconnected System, the additional installed capacity, and the potential displacement of natural gas thermal generation. Data were collected from reliable references, such as the National Electric System Operator (ONS). The additional generation was estimated using PVSyst® software and considered specific input parameters from each hydropower plant analyzed. As a result, floating photovoltaic systems can be relevant in the Brazilian electricity matrix and, considering the plants analyzed, would be able to generate 7.7 TWh/year, displacing 15 % of the natural gas power generation forecasted for 2031.

Suggested Citation

  • Raimundo, Danielle Rodrigues & Nakao Cavaliero, Carla Kazue & Pereira da Cunha, Marcelo, 2025. "Contribution of floating photovoltaic systems in hydropower plants for the expansion of Brazilian electricity sector," Renewable Energy, Elsevier, vol. 254(C).
    • Handle: RePEc:eee:renene:v:254:y:2025:i:c:s0960148125014168
    DOI: 10.1016/j.renene.2025.123754
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