The ONS (National Electric System Operator) will have until June to present a study with measures to increase the flow of energy generated in the Northeast and reduce cuts in production from renewable sources. The decision was approved this Wednesday (9), during the 304th Ordinary Meeting of the CMSE (Electric Sector Monitoring Committee).
The proposal foresees the adoption of exceptional and temporary operational criteria for the SIN (National Interconnected System), with the aim of improving the flow of energy between the subsystems and, thus, increasing the use of renewable generation in the country.
According to CMSE, the study should assess the risk-return relationship of these measures, also seeking positive impacts on reservoir storage and meeting maximum demand.
In addition to defining the study, the board approved the submission of the Generation Cuts Working Group's work plan for public consultation. The document was prepared based on contributions from industry associations and institutions and includes short, medium and long-term actions, ranging from public policy to planning and regulation.
The CMSE also reinforced the need to improve SEPs (Special Protection Systems), with a focus on expanding the limits of electrical energy exchange between the North-Northeast and Southeast-Central-West subsystems.
The committee also highlighted the importance of differentiated monitoring for transmission projects that can expand the exchange of energy between regions.
Hydrological scenario challenges planning
The deliberations take place in a context of below-average rainfall in the country's main basins. In March, the ENA (Affluent Natural Energy) was only 25% of the MLT (Long Term Average) in the Northeast and 62% in the Southeast/Central-West. Only the North performed within the average, with 100% of the MLT.
For April, the forecasts remain conservative. In the most optimistic scenario, the SIN should reach 66% of the MLT, the third worst result in the 95-year historical series. In the most pessimistic scenario, the index falls to 61%, the lowest ever recorded for the month.
The reservoirs remain under pressure: by the end of April, the expectation is that the SIN storage level will be between 67,6% and 68,8%, depending on hydrological conditions.
Public consultation and import from Venezuela
Another point approved at the CMSE meeting was the opening of a public consultation, for 15 days, to define the criteria and deadlines for changing the level of risk aversion used in the sector's computational models. The proposal meets the CNPE Resolution No. 1/2024 and will be applied in analyses conducted by MME, EPE, ONS and CCEE.
The committee also decided to extend the import of electricity from Venezuela until June 2025, an initiative ratified in April after a proposal from Bolt.
With timid expansion in the sector — 1.787 MW of centralized generation capacity and 150,5 km of new transmission lines installed by March —, the CMSE reinforced that it will continue to permanently monitor the conditions of the electrical system, seeking to guarantee the country's energy security.
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