The ONS (National Electric System Operator) released the new PMO (Monthly Operation Program) bulletin for the first week of May.
The survey predicts an increase in load demand in the SIN (National Interconnected System) and in three subsystems. The estimated growth is 1,7% (80.394 MWmed).
Among the submarkets, the greatest advances should be seen in the North, with 4,9% (8.049 MWmed) and in the South, with 4,4% (13.531 MWmed); followed by the Northeast, with 2,9% (13.420 MWmed).
For the Southeast/Central-West, the initial outlook is 0,1% (45.394 MWmed). The percentages compare the projections from May 2025 with the results seen in the same period in 2024.
“We are beginning the dry season in conditions that are within expectations and we are monitoring all the indicators. The ONS will continue to use the resources available in the SIN to guarantee energy security and fully meet society’s energy demands,” says the ONS’s general director, Marcio Rea.
Regarding reservoir levels, the expectation is that three of the country's four subsystems will end the month with more than 60% of storage power.
Stored energy
Regarding reservoir levels, the expectation is that three of the country's four subsystems will end the month with more than 70% energy storage.
The highest EAR (Stored Energy) should be seen in the North region, 98,5%, followed by the Northeast, 72,2%, and the Southeast/Central-West, 71,1%. The least favorable percentage should be recorded in the South, with 39,9%, on May 31.
According to Christiano Vieira, ONS Operations Director, the projections are consistent for the period. “If they are confirmed, the Southeast/Central-West subsystem, for example, will show a recovery of two percentage points in storage throughout the month,” he said.
“In a scenario of low inflows, this gain is only possible with an operational policy that seeks to preserve water resources,” he added.
The executive also emphasizes that the below-average inflow pattern observed in recent months may continue in May. The trend is for ENA (Natural Inflow Energy) levels to remain below the median for the period in all regions.
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