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Home / News / Market & Investments / ONS performs initial power cuts at plants connected to the distribution network.

ONS performs initial power cuts at plants connected to the distribution network.

Unprecedented management took place this Sunday (7), with cuts of 1.000 MW between 10 am and 14 pm.
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  • Photo by Henrique Hein Henrique Hein
  • June 8, 2026, at 09:08 AM
2 min 23 sec read
Canal Solar - ONS performs first power cuts at plants connected to the distribution network.
Photo: Marcello Casal Jr / Agência Brasil

ONS (National Electric System Operator) reported that it activated for the first time this Sunday (7) the plan created to deal with generation surpluses in the SIN (National Interconnected System), with cuts in plants connected to the distribution network.

In a note sent to Canal SolarThe ONS (National System Operator) reported that it requested the management of 1.000 MW between 10 am and 14 pm. "The measure was indicated to balance the high generation of micro and mini-distributed generation, combined with a lower load due to the long weekend because of the holiday." Corpus Christi"The Operator highlighted."

Although power outages have been part of the routine for large-scale solar and wind power plants for some years now (a phenomenon known in the industry as curtailmentThis is the first time the mechanism has been applied to smaller power plants connected to the distribution network.

According to ONS, distributors were informed about the measure on Saturday (6) and proceeded with the necessary maneuvers to maintain the balance of the SIN. Additionally, ONS implemented complementary operational measures to reduce generation.

"It is worth highlighting that, in real time, the ONS kept the agents updated and coordinated actions in the SIN, managing available resources according to the demand of society, in direct communication with the sector's agents," the entity emphasized.

Finally, the ONS (National System Operator) reported that it remains attentive to what it called a "new electrical energy reality" and that it is "working to ensure the safety and efficiency of the system, in accordance with current network procedures."

See below for the full statement from ONS.

"The National Electric System Operator (ONS) reports that yesterday (Saturday) it successfully activated the surplus management plan for the operation carried out today (Sunday). In total, management of 1.000 MW was requested between 10 am and 14 pm."

The measure was proposed to balance the high volume of micro and mini distributed generation combined with a lower load due to the extended weekend because of the Corpus Christi holiday.

Distributors were notified this Saturday and proceeded with the necessary maneuvers to maintain the balance of the National Interconnected System (SIN). Additionally, the ONS (National System Operator) implemented complementary operational measures to reduce generation in the SIN.

It is worth highlighting that, in real time, the ONS kept the agents updated and coordinated actions in the SIN, managing available resources according to societal demand, in direct communication with sector agents.

The Operator is also closely monitoring the new electrical energy reality and working to ensure the safety and efficiency of the system, in accordance with current network procedures. 

all the content of Canal Solar is protected by copyright law, and partial or total reproduction of this site in any medium is expressly prohibited. If you are interested in collaborating or reusing part of our material, please contact us by email: redacao@canalsolar.com.br.

Curtailment renewable energy MMGD (micro and mini distributed generation) ONS (National Electric System Operator)
Photo by Henrique Hein
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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