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Home / ONS (National Electric System Operator)

Tags ONS (National Electric System Operator)

Institutions recommend maintaining risk aversion parameters in the electricity sector
  • June 4, 2025
  • Electrical Sector

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
  • Electrical Sector

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
  • Electrical Sector

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
  • Electrical Sector

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
  • Indicators and Projections

ONS predicts 1,6% drop in May load

If confirmed, this will be the first power outage recorded in 2025
  • Indicators and Projections

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
ANEEL approves public consultation for regulation of governance committee
  • 22 for April, 2025
  • Electrical Sector

ANEEL approves public consultation for regulation of governance committee

Proposal seeks to organize actions between agencies in the electricity sector and improve methodologies and computational models
ANEEL approves public consultation for regulation of governance committee
  • Electrical Sector

ANEEL approves public consultation for regulation of governance committee

Proposal seeks to organize actions between agencies in the electricity sector and improve methodologies and computational models
Reservoir levels remain stable across the country, says ONS
  • 14 for April, 2025
  • Electrical Sector

Reservoir levels remain stable across the country, says ONS

Three regions are expected to end the wet season with storage above 65%
Reservoir levels remain stable across the country, says ONS
  • Electrical Sector

Reservoir levels remain stable across the country, says ONS

Three regions are expected to end the wet season with storage above 65%
Distributed micro and mini generation could reach 64 GW by 2029
  • 7 for April, 2025
  • Electrical Sector

Distributed micro and mini generation could reach 64 GW by 2029

The National Interconnected System's energy load is expected to grow, on average, by 3,4% per year until the end of the decade
Distributed micro and mini generation could reach 64 GW by 2029
  • Electrical Sector

Distributed micro and mini generation could reach 64 GW by 2029

The National Interconnected System's energy load is expected to grow, on average, by 3,4% per year until the end of the decade
Ingeteam has its first mathematical model of PV plants validated by ONS
  • March 28, 2025
  • News

Ingeteam has its first mathematical model of PV plants validated by ONS

Validation ensures regulatory compliance and operational security of systems
Ingeteam has its first mathematical model of PV plants validated by ONS
  • News

Ingeteam has its first mathematical model of PV plants validated by ONS

Validation ensures regulatory compliance and operational security of systems
ONS predicts stability in reservoirs and a drop in rainfall at the end of March
  • March 24, 2025
  • Electrical Sector

ONS predicts stability in reservoirs and a drop in rainfall at the end of March

Operator projections point to an early end to the typically wet period
ONS predicts stability in reservoirs and a drop in rainfall at the end of March
  • Electrical Sector

ONS predicts stability in reservoirs and a drop in rainfall at the end of March

Operator projections point to an early end to the typically wet period
Solar generation in SIN reaches 37.869 MW and sets a new record
  • March 18, 2025
  • Electrical Sector

Solar generation in SIN reaches 37.869 MW and sets a new record

The last record recorded occurred on February 26, when the source reached 37.228 MW
Solar generation in SIN reaches 37.869 MW and sets a new record
  • Electrical Sector

Solar generation in SIN reaches 37.869 MW and sets a new record

The last record recorded occurred on February 26, when the source reached 37.228 MW
Blackout hits AM and northwest PA after transmission line failure
  • March 10, 2025
  • Electrical Sector

Blackout hits AM and northwest PA after transmission line failure

The ONS reported that it is still investigating the causes of the incident with the agents involved.
Blackout hits AM and northwest PA after transmission line failure
  • Electrical Sector

Blackout hits AM and northwest PA after transmission line failure

The ONS reported that it is still investigating the causes of the incident with the agents involved.
Reservoirs are expected to close March with levels above 60% in most of the country
  • March 10, 2025
  • Electrical Sector

Reservoirs are expected to close March with levels above 60% in most of the country

ONS points out that stored energy levels should remain above this indicator in three of the four Brazilian subsystems
Reservoirs are expected to close March with levels above 60% in most of the country
  • Electrical Sector

Reservoirs are expected to close March with levels above 60% in most of the country

ONS points out that stored energy levels should remain above this indicator in three of the four Brazilian subsystems
The risks of heat waves and solar energy
  • February 28th, 2025
  • News

The impacts of heat waves on the electricity sector and solar energy generation

Distributed generation emerges as a mechanism to avoid the risk of blackouts
The risks of heat waves and solar energy
  • News

The impacts of heat waves on the electricity sector and solar energy generation

Distributed generation emerges as a mechanism to avoid the risk of blackouts
ONS records fifth record for instantaneous load demand in 2025
  • February 25th, 2025
  • Electrical Sector

ONS records fifth record for instantaneous load demand in 2025

From the first record recorded this year to now, the load increased by 2.665 MW at peak demand
ONS records fifth record for instantaneous load demand in 2025
  • Electrical Sector

ONS records fifth record for instantaneous load demand in 2025

From the first record recorded this year to now, the load increased by 2.665 MW at peak demand
ONS records fourth record in instantaneous load demand in 2025
  • February 24th, 2025
  • Electrical Sector

ONS records fourth record in instantaneous load demand in 2025

Indicator has been impacted by weather conditions and high temperatures recorded in several regions of Brazil
ONS records fourth record in instantaneous load demand in 2025
  • Electrical Sector

ONS records fourth record in instantaneous load demand in 2025

Indicator has been impacted by weather conditions and high temperatures recorded in several regions of Brazil
ONS raises projection for growth in energy demand in Brazil to 6,5% in February
  • February 21th, 2025
  • Electrical Sector

ONS raises energy load projection to 6,5% in February

The estimate was for a 3,7% increase at the beginning of the month, which did not materialize due to increased consumption amid heat waves.
ONS raises projection for growth in energy demand in Brazil to 6,5% in February
  • Electrical Sector

ONS raises energy load projection to 6,5% in February

The estimate was for a 3,7% increase at the beginning of the month, which did not materialize due to increased consumption amid heat waves.
ONS predicts 5,8% increase in energy demand in February
  • February 18th, 2025
  • Electrical Sector

ONS predicts 5,8% increase in energy demand in February

At the beginning of the month, the forecast was for an increase of 3,7%; heat intensifies consumption in the country
ONS predicts 5,8% increase in energy demand in February
  • Electrical Sector

ONS predicts 5,8% increase in energy demand in February

At the beginning of the month, the forecast was for an increase of 3,7%; heat intensifies consumption in the country
Hydroelectric reservoirs reach 70% of capacity
  • February 17th, 2025
  • Electrical Sector

Hydroelectric reservoirs reach 70% of capacity

Levels are directly related to the rainy season, which, since last year, has recorded volumes above the historical average
Hydroelectric reservoirs reach 70% of capacity
  • Electrical Sector

Hydroelectric reservoirs reach 70% of capacity

Levels are directly related to the rainy season, which, since last year, has recorded volumes above the historical average
Renewable energy generation cuts decline in January, says Itaú BBA
  • February 13th, 2025
  • Indicators and Projections

Renewable energy generation cuts decline in January, says Itaú BBA

In solar energy, curtailments affected 12% of generation in January, compared to 17,8% in the previous month
Renewable energy generation cuts decline in January, says Itaú BBA
  • Indicators and Projections

Renewable energy generation cuts decline in January, says Itaú BBA

In solar energy, curtailments affected 12% of generation in January, compared to 17,8% in the previous month
ONS records third record in maximum instantaneous load demand in 2025
  • February 13th, 2025
  • Electrical Sector

ONS records third record in maximum instantaneous load demand in 2025

SIN demand reached 103.785 MW this Wednesday (12), suring the record that had been reached the day before 
ONS records third record in maximum instantaneous load demand in 2025
  • Electrical Sector

ONS records third record in maximum instantaneous load demand in 2025

SIN demand reached 103.785 MW this Wednesday (12), suring the record that had been reached the day before 
ONS s new record in maximum instantaneous load demand
  • February 12th, 2025
  • Electrical Sector

ONS s new record in maximum instantaneous load demand

Operator reported that SIN's load demand reached 103.335 MW last Tuesday (11)
ONS s new record in maximum instantaneous load demand
  • Electrical Sector

ONS s new record in maximum instantaneous load demand

Operator reported that SIN's load demand reached 103.335 MW last Tuesday (11)
ONS denies risk of blackout due to GD overload in Brazil
  • February 11th, 2025
  • News

ONS denies risk of blackout in 11 states due to DG overload

Operator says that increasing distributed generation and flow inversion in substations are mapped technical issues
ONS denies risk of blackout due to GD overload in Brazil
  • News

ONS denies risk of blackout in 11 states due to DG overload

Operator says that increasing distributed generation and flow inversion in substations are mapped technical issues
MPF requests R$70 billion in compensation for blackout in Amapá in 2020
  • February 10th, 2025
  • Electrical Sector

MPF requests R$70 billion in compensation for blackout in Amapá in 2020

The agency concluded that the blackout was caused by failures and omissions by energy companies and bodies in the electricity sector
MPF requests R$70 billion in compensation for blackout in Amapá in 2020
  • Electrical Sector

MPF requests R$70 billion in compensation for blackout in Amapá in 2020

The agency concluded that the blackout was caused by failures and omissions by energy companies and bodies in the electricity sector
Instantaneous energy demand in SIN reaches new record
  • January 27, 2025
  • Electrical Sector

Instantaneous energy demand in SIN reaches new record

The previous record of 102.478 MW was set on March 15, 2024.
Instantaneous energy demand in SIN reaches new record
  • Electrical Sector

Instantaneous energy demand in SIN reaches new record

The previous record of 102.478 MW was set on March 15, 2024.
Recovery of reservoirs will allow better operation during the dry season, says ONS
  • January 27, 2025
  • Electrical Sector

Recovery of reservoirs will allow for smoother operations during the dry season, says ONS

Operator reports that stored energy projections are above 60% in all subsystems for the end of January
Recovery of reservoirs will allow better operation during the dry season, says ONS
  • Electrical Sector

Recovery of reservoirs will allow for smoother operations during the dry season, says ONS

Operator reports that stored energy projections are above 60% in all subsystems for the end of January
ONS s first solar generation records in 2025
  • January 23, 2025
  • Indicators and Projections

ONS s first solar generation records in 2025

Operator identified three new brands, two in the SIN and one in the Southeast/Central-West subsystem
ONS s first solar generation records in 2025
  • Indicators and Projections

ONS s first solar generation records in 2025

Operator identified three new brands, two in the SIN and one in the Southeast/Central-West subsystem
STJ decides in favor of ANEEL and overturns the ABEEólica injunction and ABSOLAR
  • January 23, 2025
  • Electrical Sector

STJ decides in favor of ANEEL and overturns the injunction of the ABSOLAR and ABEEólica

Minister Herman Benjamin accepted the argument that the injunction granted could cause serious risk to public and economic order
STJ decides in favor of ANEEL and overturns the ABEEólica injunction and ABSOLAR
  • Electrical Sector

STJ decides in favor of ANEEL and overturns the injunction of the ABSOLAR and ABEEólica

Minister Herman Benjamin accepted the argument that the injunction granted could cause serious risk to public and economic order
ONS reduces forecast for energy demand growth to 2,6% in January
  • January 20, 2025
  • Electrical Sector

ONS reduces forecast for energy demand growth to 2,6% in January

New projection represents a reduction of 1.253 MWmed in relation to initial estimates, when expected growth was 4,2%
ONS reduces forecast for energy demand growth to 2,6% in January
  • Electrical Sector

ONS reduces forecast for energy demand growth to 2,6% in January

New projection represents a reduction of 1.253 MWmed in relation to initial estimates, when expected growth was 4,2%
Operational plan foresees R$7,6 billion for the electricity sector until 2029
  • January 8, 2025
  • Electrical Sector

Operational plan foresees R$7,6 billion for the electricity sector until 2029 

Document released by ONS includes maintenance of existing structure and construction of new transmission lines 
Operational plan foresees R$7,6 billion for the electricity sector until 2029
  • Electrical Sector

Operational plan foresees R$7,6 billion for the electricity sector until 2029 

Document released by ONS includes maintenance of existing structure and construction of new transmission lines 
Energy consumption in the country is expected to increase by 3,6% in January 2025
  • January 6, 2025
  • Electrical Sector

Energy consumption in the country is expected to increase by 3,6% in January

First month of the year should 82.493 MWmed of consumption in the SIN, according to ONS report
Energy consumption in the country is expected to increase by 3,6% in January 2025
  • Electrical Sector

Energy consumption in the country is expected to increase by 3,6% in January

First month of the year should 82.493 MWmed of consumption in the SIN, according to ONS report
Check out the results of the planning for the electricity sector until 2029
  • December 30, 2024
  • Electrical Sector

Check out the results of the planning for the electricity sector until 2029

Study, released by ONS, predicts total investments of R$7,6 billion
Check out the results of the planning for the electricity sector until 2029
  • Electrical Sector

Check out the results of the planning for the electricity sector until 2029

Study, released by ONS, predicts total investments of R$7,6 billion

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