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Politics & Regulation

Government will reduce hydroelectric generation to preserve reservoirs in the face of Super El Niño.

The measure seeks to preserve reservoirs in the face of the possibility of the climatic phenomenon intensifying in the second half of the year.

Canal Solar - Government will reduce hydroelectric generation to preserve reservoirs in the face of Super El Niño. 

Photo: Caio Coronel/Itaipu

The CMSE (Electricity Sector Monitoring Committee) reported that it has decided to reinforce preventive actions to guarantee the security of energy supply in light of the possibility of intensified effects of El Niño.

According to the group, there is a 70% probability that the phenomenon will gain strength in the second half of this year. "The group, in a coordinated and institutional manner, has been acting preventively in actions that are part of the Strategic Agenda for Electricity 2026, aimed at ensuring the reliability of the country's electricity supply," the entity reported.

Among the main measures announced is the reduction of hydroelectric outflows, a strategy that consists of releasing less water from reservoirs to preserve storage levels and increase the water security of the electrical system in the coming months.

The decision was presented during the 322nd meeting of the CMSE, held this Wednesday (5), at the MME (Ministry of Mines and Energy), in Brasília (DF). According to the Committee, the measure is part of the Strategic Electroenergy Agenda 2026, a set of actions aimed at the reliability of energy supply in a scenario of greater climate risk.

Measures taken

In addition to preserving the reservoirs, CMSE reported that it will continue to adopt other preventive actions, including:

  • Intensive monitoring of hydrometeorological conditions;
  • Continuation of the country's PRP (Recovery Plan for Regulating Reservoirs);
  • Coordination between MME, ANEEL and ONS to monitor preventive measures adopted by generators, transmission companies and distributors;
  • Participation in inter-institutional groups on the impacts of El Niño;
  • Monitoring the supply of fuel destined for isolated systems in the Northern Region.

The board also reported the completion of measures such as the revision of risk aversion parameters, the approval of the 2026 Reference Curve, and the anticipation of winning contracts from capacity reserve auctions.

Reservoirs remain in a comfortable situation.

Despite concerns about El Niño, reservoir levels remain high. At the end of July, storage levels were at:

  • Southeast/Central-West: 63%;
  • South: 84%;
  • Northeast: 84%;
  • North: 90%.

In the overall context of the SIN (National Interconnected System), storage corresponds to approximately 70% of capacity. Regarding rainfall, July saw above-average precipitation only in the basins of the Southern regions and part of the Itaipu basin. In other regions, volumes were below the historical average.

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Henrique Hein
About the Author
Henrique Hein

He worked at Correio Popular and Rádio Trianon. He has experience in podcast production, radio programs, interviews and reporting. Has been following the solar sector since 2020.

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