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Home / ONS (National Electric System Operator)

Tags ONS (National Electric System Operator)

ANEEL approved all concession renewals for distributors analyzed in 2025.
  • November 12, 2025
  • News

ONS projects water storage levels 25% below 2025 levels in an unfavorable scenario.

Projections for the end of the dry season indicate a need for additional thermal power generation and close monitoring of rainfall.
ANEEL approved all concession renewals for distributors analyzed in 2025.
  • News

ONS projects water storage levels 25% below 2025 levels in an unfavorable scenario.

Projections for the end of the dry season indicate a need for additional thermal power generation and close monitoring of rainfall.
Canal Solar - Huawei obtains ONS validation for the SUN2000-330KTL inverter.
  • November 7, 2025
  • Technology and inovation

Huawei obtains ONS validation for the SUN2000-330KTL inverter.

Certification at levels N1 and N2 proves the full compliance of Huawei solutions with the dynamic criteria of the SIN (Brazilian Interconnected System).
Canal Solar - Huawei obtains ONS validation for the SUN2000-330KTL inverter.
  • Technology and inovation

Huawei obtains ONS validation for the SUN2000-330KTL inverter.

Certification at levels N1 and N2 proves the full compliance of Huawei solutions with the dynamic criteria of the SIN (Brazilian Interconnected System).
ONS's energy surplus management plan focuses on maintaining the stability of the SIN (National Interconnected System).
  • November 3, 2025
  • News

ONS's energy surplus management plan focuses on maintaining the stability of the SIN (National Interconnected System).

Emergency measures will only be activated when there are no viable alternatives to reduce GC.
ONS's energy surplus management plan focuses on maintaining the stability of the SIN (National Interconnected System).
  • News

ONS's energy surplus management plan focuses on maintaining the stability of the SIN (National Interconnected System).

Emergency measures will only be activated when there are no viable alternatives to reduce GC.
  • October 28, 2025
  • News

ONS launches project to create its own electroenergy models

Initiative seeks to strengthen operator autonomy in managing the electrical system
  • News

ONS launches project to create its own electroenergy models

Initiative seeks to strengthen operator autonomy in managing the electrical system
ONS launches page dedicated to curtailment to increase transparency
  • October 24, 2025
  • News

ONS launches page dedicated to curtailment to increase transparency

According to the new tool, between January 1 and October 21, 2025, cuts totaled an average of 42,2 GW
ONS launches page dedicated to curtailment to increase transparency
  • News

ONS launches page dedicated to curtailment to increase transparency

According to the new tool, between January 1 and October 21, 2025, cuts totaled an average of 42,2 GW
Canal Solar - ANEEL validates the ONS's understanding that distributors have a duty to cut generation when necessary
  • October 16, 2025
  • Policy and Regulation

ANEEL publishes official letter: consumers with DG can be included in generation cuts

Publication of the Regulatory Agency document occurs after validation of the emergency plan proposed by ONS
Canal Solar - ANEEL validates the ONS's understanding that distributors have a duty to cut generation when necessary
  • Policy and Regulation

ANEEL publishes official letter: consumers with DG can be included in generation cuts

Publication of the Regulatory Agency document occurs after validation of the emergency plan proposed by ONS
  • October 13, 2025
  • News

Manaus power line prevents loss of power due to lack of gas in thermal plants

Interconnection allowed an increase in generation in Roraima by 55 MW and balanced the flow in transmission lines
  • News

Manaus power line prevents loss of power due to lack of gas in thermal plants

Interconnection allowed an increase in generation in Roraima by 55 MW and balanced the flow in transmission lines
Electricity Sector Monitoring Committee presents plans to ensure energy supply
  • October 9, 2025
  • Policy and Regulation

Electricity Sector Monitoring Committee presents plans to ensure energy supply

Projections indicate that SIN will have enough energy to meet demand until March 2026
Electricity Sector Monitoring Committee presents plans to ensure energy supply
  • Policy and Regulation

Electricity Sector Monitoring Committee presents plans to ensure energy supply

Projections indicate that SIN will have enough energy to meet demand until March 2026
Canal Solar - CCEE and ONS point to a drop in energy consumption and stability in the country's reservoirs
  • October 6, 2025
  • News

CCEE and ONS point to a drop in energy consumption and stability in reservoirs

Bulletins released by the entities show a reduction in demand and a hydrological scenario favorable to the country's energy security.
Canal Solar - CCEE and ONS point to a drop in energy consumption and stability in the country's reservoirs
  • News

CCEE and ONS point to a drop in energy consumption and stability in reservoirs

Bulletins released by the entities show a reduction in demand and a hydrological scenario favorable to the country's energy security.
Canal Solar - ANEEL, ONS and Abradee discuss protocols for distributed generation
  • September 20, 2025
  • Policy and Regulation

ANEEL, ONS and Abradee discuss protocols for distributed generation

ONS will deliver the details of the plan to the Agency by October 31st
Canal Solar - ANEEL, ONS and Abradee discuss protocols for distributed generation
  • Policy and Regulation

ANEEL, ONS and Abradee discuss protocols for distributed generation

ONS will deliver the details of the plan to the Agency by October 31st
Canal Solar - Reservoirs should close September above 50%, says ONS
  • September 8, 2025
  • Market and Prices

Reservoirs should close September above 50%, says ONS

The ONS also predicts a reduction in cargo demand in the SIN and Southeast/Central-West regions.
Canal Solar - Reservoirs should close September above 50%, says ONS
  • Market and Prices

Reservoirs should close September above 50%, says ONS

The ONS also predicts a reduction in cargo demand in the SIN and Southeast/Central-West regions.
Canal Solar - Reservoirs should start August with more than 50% of capacity throughout the country
  • July 28, 2025
  • News

Reservoirs are expected to start August with more than 50% of capacity across the country

Operator states that volume guarantees safe operating conditions for the SIN to meet the country's energy demands
Canal Solar - Reservoirs should start August with more than 50% of capacity throughout the country
  • News

Reservoirs are expected to start August with more than 50% of capacity across the country

Operator states that volume guarantees safe operating conditions for the SIN to meet the country's energy demands
Canal Solar - Transmission lines and thermoelectric plants are the focus of the ONS during the dry season
  • July 18, 2025
  • Policy and Regulation

Transmission lines and thermoelectric plants are the focus of the ONS during the dry season

The operator also presented an update on energy service projections until December 2025.
Canal Solar - Transmission lines and thermoelectric plants are the focus of the ONS during the dry season
  • Policy and Regulation

Transmission lines and thermoelectric plants are the focus of the ONS during the dry season

The operator also presented an update on energy service projections until December 2025.
Canal solar - ONS releases new bulletin and predicts load drop in SIN
  • July 14, 2025
  • Market and Prices

ONS releases bulletin and predicts load drop in SIN

Behavior is associated with milder temperatures in part of the country, explains the Operator's general director
Canal solar - ONS releases new bulletin and predicts load drop in SIN
  • Market and Prices

ONS releases bulletin and predicts load drop in SIN

Behavior is associated with milder temperatures in part of the country, explains the Operator's general director
ONS recommends return of daylight saving time in PEN 2025
  • July 10, 2025
  • News, Policy and Regulation

ONS recommends return of daylight saving time in PEN 2025

Published this Tuesday (8), the document assesses the conditions for serving the electricity market in the SIN between 2025 and 2029
ONS recommends return of daylight saving time in PEN 2025
  • News, Policy and Regulation

ONS recommends return of daylight saving time in PEN 2025

Published this Tuesday (8), the document assesses the conditions for serving the electricity market in the SIN between 2025 and 2029
Canal Solar - Curtailment breaks record and reaches 28% of centralized solar generation, says Bradesco BBI
  • July 8, 2025
  • Market and Prices

Curtailment breaks record and reaches 28% of centralized solar generation, says Bradesco BBI

According to the report, there are currently no policies in place to mitigate the losses faced by photovoltaic projects. 
Canal Solar - Curtailment breaks record and reaches 28% of centralized solar generation, says Bradesco BBI
  • Market and Prices

Curtailment breaks record and reaches 28% of centralized solar generation, says Bradesco BBI

According to the report, there are currently no policies in place to mitigate the losses faced by photovoltaic projects. 
Canal Solar - ONS projects 14,1% growth in energy demand by 2029
  • July 8, 2025
  • Market and Prices

ONS projects 14,1% growth in energy demand by 2029

Forecast also indicates that solar energy should represent 32,9% of the Brazilian electricity matrix at the end of the period
Canal Solar - ONS projects 14,1% growth in energy demand by 2029
  • Market and Prices

ONS projects 14,1% growth in energy demand by 2029

Forecast also indicates that solar energy should represent 32,9% of the Brazilian electricity matrix at the end of the period
Canal Solar - Reservoir storage levels expected to remain above 60% in July
  • July 7, 2025
  • News

Reservoir storage levels expected to remain above 60% in July

Projection released by ONS refers to the operational week between July 5th and 11th 
Canal Solar - Reservoir storage levels expected to remain above 60% in July
  • News

Reservoir storage levels expected to remain above 60% in July

Projection released by ONS refers to the operational week between July 5th and 11th 
Canal Solar - ONS determines increase in the use of thermal power plants to guarantee energy
  • July 3, 2025
  • News

ONS determines increased use of thermal power plants to guarantee energy supply

Request is part of the Operator's set of actions to ensure meeting cargo demands in the second half of the year
Canal Solar - ONS determines increase in the use of thermal power plants to guarantee energy
  • News

ONS determines increased use of thermal power plants to guarantee energy supply

Request is part of the Operator's set of actions to ensure meeting cargo demands in the second half of the year
Canal Solar - Last days to join the next Demand Response auction
  • July 2, 2025
  • Market and Prices

Last days to join the next Demand Response auction

Consumer agents and aggregators are eligible to participate in the event, scheduled for July 16.
Canal Solar - Last days to join the next Demand Response auction
  • Market and Prices

Last days to join the next Demand Response auction

Consumer agents and aggregators are eligible to participate in the event, scheduled for July 16.
  • June 30, 2025
  • Market and Prices

South could reach 91,8% of storage by the end of July

If the ONS forecast is confirmed, this will represent a recovery of almost 25 percentage points in just one month.
  • Market and Prices

South could reach 91,8% of storage by the end of July

If the ONS forecast is confirmed, this will represent a recovery of almost 25 percentage points in just one month.
  • June 27, 2025
  • News

ONS projects increase in renewable energy exchange between regions

Operator presented a balance of SIN operations in the first half of 2025
  • News

ONS projects increase in renewable energy exchange between regions

Operator presented a balance of SIN operations in the first half of 2025
Canal Solar - If nothing is done, not even centralized generation will be able to cope, warns ONS advisor
  • June 26, 2025
  • Policy and Regulation

If nothing is done, not even centralized generation will be able to cope, warns ONS advisor

Executive says that curtailment is an energy problem and that the solution involves the participation of all agents in the sector
Canal Solar - If nothing is done, not even centralized generation will be able to cope, warns ONS advisor
  • Policy and Regulation

If nothing is done, not even centralized generation will be able to cope, warns ONS advisor

Executive says that curtailment is an energy problem and that the solution involves the participation of all agents in the sector
Canal Solar - FMGD releases statement of repudiation against ONS technical report
  • June 24, 2025
  • Policy and Regulation

FMGD releases statement of repudiation against ONS technical report 

Entity says that the inclusion of DG systems in the scope of operational restrictions is contrary to the principles of the energy transition
Canal Solar - FMGD releases statement of repudiation against ONS technical report
  • Policy and Regulation

FMGD releases statement of repudiation against ONS technical report 

Entity says that the inclusion of DG systems in the scope of operational restrictions is contrary to the principles of the energy transition
Canal Solar - New technological resources and neutral management are highlighted as essential for MMGD monitoring
  • June 23, 2025
  • Market and Prices

New technological resources and neutral management are highlighted as essential for DG monitoring

The creation of independent DSOs would avoid potential risks of conflict of interest, says professional
Canal Solar - New technological resources and neutral management are highlighted as essential for MMGD monitoring
  • Market and Prices

New technological resources and neutral management are highlighted as essential for DG monitoring

The creation of independent DSOs would avoid potential risks of conflict of interest, says professional
Canal Solar - ONS points out that curtailment should become even more prevalent in the coming years
  • June 18, 2025
  • Policy and Regulation

ONS says curtailment is likely to become even more prevalent in the coming years

Conclusion is part of the GT report - created by the MME - which seeks solutions to mitigate the impacts of generation cuts
Canal Solar - ONS points out that curtailment should become even more prevalent in the coming years
  • Policy and Regulation

ONS says curtailment is likely to become even more prevalent in the coming years

Conclusion is part of the GT report - created by the MME - which seeks solutions to mitigate the impacts of generation cuts
  • June 16, 2025
  • News

ONS prepares to reinforce power supply in the second half of the year

The concern is with meeting the country's peak consumption needs
  • News

ONS prepares to reinforce power supply in the second half of the year

The concern is with meeting the country's peak consumption needs
Institutions recommend maintaining risk aversion parameters in the electricity sector
  • June 4, 2025
  • News

Institutions recommend maintaining risk aversion parameters in the electricity sector

MME has opened a public consultation to discuss with industry agents possible changes to the mathematical models that guide the system's operation
Institutions recommend maintaining risk aversion parameters in the electricity sector
  • News

Institutions recommend maintaining risk aversion parameters in the electricity sector

MME has opened a public consultation to discuss with industry agents possible changes to the mathematical models that guide the system's operation
Turnout percentages remain below average in June
  • June 2, 2025
  • News

Turnout percentages remain below average in June

Southern region should record higher precipitation volume, reaching 86% of MLT
Turnout percentages remain below average in June
  • News

Turnout percentages remain below average in June

Southern region should record higher precipitation volume, reaching 86% of MLT
Datacenters gain approval for connection in the Northeast
  • May 30, 2025
  • Technology and inovation

Datacenters gain approval for connection in the Northeast

These are two projects located in the Pecém complex, in Ceará.
Datacenters gain approval for connection in the Northeast
  • Technology and inovation

Datacenters gain approval for connection in the Northeast

These are two projects located in the Pecém complex, in Ceará.
ONS projects load drop in SIN and below-average inflows for May
  • May 26, 2025
  • News

Brazil is expected to end May with below-average inflows, says ONS

SIN load should end the month with a 1,6% drop compared to the same period last year
ONS projects load drop in SIN and below-average inflows for May
  • News

Brazil is expected to end May with below-average inflows, says ONS

SIN load should end the month with a 1,6% drop compared to the same period last year
Chamber invites associations to debate energy storage
  • May 22, 2025
  • Policy and Regulation

Chamber invites associations to debate energy storage

The meeting is scheduled for next Wednesday (28)
Chamber invites associations to debate energy storage
  • Policy and Regulation

Chamber invites associations to debate energy storage

The meeting is scheduled for next Wednesday (28)
  • May 19, 2025
  • Market and Prices

ONS predicts 1,6% drop in May load

If confirmed, this will be the first power outage recorded in 2025
  • Market and Prices

ONS predicts 1,6% drop in May load

If confirmed, this will be the first power outage recorded in 2025
ONS reinforces the need for the return of daylight saving time in Brazil
  • May 16, 2025
  • Policy and Regulation

ONS reinforces the need for the return of daylight saving time in Brazil

ONS Director General says measure is technically necessary, as wet season was shorter than expected
ONS reinforces the need for the return of daylight saving time in Brazil
  • Policy and Regulation

ONS reinforces the need for the return of daylight saving time in Brazil

ONS Director General says measure is technically necessary, as wet season was shorter than expected
Operator estimates that Southeast/Central-West reservoirs will close next month with levels above 70%
  • 28 for April, 2025
  • News

Cargo projections indicate 1,7% growth in May, says ONS

Operator also estimates that reservoirs in 3 of the country's 4 subsystems will close next month with levels above 70%
Operator estimates that Southeast/Central-West reservoirs will close next month with levels above 70%
  • News

Cargo projections indicate 1,7% growth in May, says ONS

Operator also estimates that reservoirs in 3 of the country's 4 subsystems will close next month with levels above 70%
  • 25 for April, 2025
  • News

ONS updates data on transmission network runoff margins

Tool presents indicative results of the SIN's remaining capacity for new generation projects
  • News

ONS updates data on transmission network runoff margins

Tool presents indicative results of the SIN's remaining capacity for new generation projects

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