Monday, September 28, 2026

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ThemesTheme

Power Grid

Brazil's power transmission and distribution infrastructure and its operation by grid operator ONS — including renewable-absorption limits and curtailment mechanisms.

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18material mentions
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ThemeData centers2 shared articles ↗MacroInflation2 shared articles ↗MacroPublic Debt2 shared articles ↗OrganizationAxia Energia2 shared articles ↗OrganizationEneva2 shared articles ↗OrganizationCemig1 shared article ↗OrganizationLight1 shared article ↗AssetU.S. dollar1 shared article ↗IndexIbovespa1 shared article ↗EconomyCity of Rio de Janeiro1 shared article ↗

Last 90 days

What sources are saying

ONS triggered the Surplus Management Plan on August 23 for the second time this year, restricting smaller plants on distribution grids from 11:00 to 13:30 — days after announcing Erag, an automatic solar-curtailment scheme with up-to-3 GW design capacity and a pilot expected by end-2026. Surplus generation on low-demand days has become a structural operating problem.

Updated September 26, 2026 · 11 verified articles

Market transmission

Why it matters

Grid constraints define how much renewable generation becomes revenue: curtailment rules, compensation and transmission/storage investment shift returns among generators, transmission firms and consumers.

Explanatory mechanism, not a forecast or recommendation.

Articles in chronological order

11
MACROBrazil

Aneel sets a green tariff flag for October, ending five months of the yellow flag extra charge on power bills

The National Electric Energy Agency set on September 25 the green tariff flag for October power bills, with no extra charge. The yellow flag, which added R$ 1.885 per 100 kWh consumed, had been in place for five months. According to Aneel, increased rainfall, especially in the South and Southeast, stabilized hydroelectric reservoirs and reduced the need to dispatch costlier thermal plants.

5 sourcesSep 25, 2026
MACROBrazil

Aneel raises the average 2026 power tariff effect to 9.4%, nearly double projected inflation

The third 2026 edition of Aneel's InfoTarifas bulletin projects an average tariff effect of 9.4% for the year, up from 8.6% in the previous edition and above projected IGP-M (4.4%) and IPCA (5.0%). Financial components account for 4.7 points, sector charges 1.6, energy purchases 1.1, transmission 0.9 and Parcela B 0.8. Distributing about R$ 5.5 billion in UBP funds to utilities in the Sudam and Sudene areas cut the pressure by 1.9 points.

2 sourcesSep 18, 2026
MACROBrazil

Lula signs Redata and suspends four federal taxes for five years for data centers, with counterparts

Lula signed on September 15 the Redata, a special tax regime for data center services that suspends four federal taxes on equipment purchases and imports for up to five years, with a revenue loss estimated at R$ 5.2 billion in 2026 and about R$ 1 billion a year afterwards; companies must run on renewable or low-emission energy, reserve at least 10% of processing capacity for the Brazilian market and direct investment to research and to the North, Northeast and Centre-West, or return the benefit. The definition of eligible energy sources was left to a ministerial order, and a senator threatened to react with a legislative decree if natural gas is excluded, per Poder360; the ICMS cut depends on Confaz.

4 sourcesSep 15, 2026
EMPRESASBrazil

Rio court closes Light's judicial reorganisation after three years and R$ 11 billion restructured

The 3rd Business Court of Rio de Janeiro ruled on September 9 to close Light's judicial reorganisation, declaring all plan obligations verified in the supervision period fulfilled; the company reported the decision to the market and drops the in-reorganisation label from its records. The process, begun in May 2023, restructured about R$ 11 billion, including R$ 7 billion in debentures and R$ 3.1 billion in bonds.

4 sourcesSep 10, 2026
EMPRESASBrazil

ONS weighs activating generation-cut plan on the September 7 holiday over oversupply

The National Electric System Operator is weighing activating on the September 7 holiday the emergency protocol that orders distributors to curtail generation from large and small plants during low-load periods, per CNN Brasil and Poder360. ONS rates the chance of activation as low on Monday and moderate on Sunday, September 6; the plan was already triggered on June 7 and August 23 this year, per Poder360.

2 sourcesSep 05, 2026
EMPRESASBrazil

Eneva completes the R$ 839 million sale of Pecém II and signs a deal with Diamante to swap a coal plant for a stake

Eneva completed the sale of the shares of Pecém II, a coal-fired plant in Ceará, for R$ 839.2 million in total, per InfoMoney; Money Times details R$ 748.4 million paid at closing and up to R$ 149 million more subject to conditions. Per InfoMoney, the company also signed a deal with Diamante Geração de Energia to swap its coal plant for a stake in a Pecém company. The deal was announced on September 1 and stayed blocked at NEXO until Money Times completed the double confirmation.

3 sourcesSep 01, 2026
EMPRESASBrazil

Grid operator ONS triggers surplus plan for second time this year as it readies automatic solar curtailment

Grid operator ONS triggered its Energy Surplus Management Plan on Sunday, August 23, restricting generation from smaller plants connected to distribution grids from 11:00 to 13:30 — the mechanism's second activation in 2026. The episode comes days after the operator announced Erag, an automatic solar-curtailment scheme with up-to-3 GW design capacity and a pilot expected by year-end.

4 sourcesAug 21, 2026