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Brazil renewable energy curtailment and grid stability risks

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2026-08-26 00:41 UTC → 2026-09-17 13:41 UTC · added ~~removed~~

Brazil renewable energy curtailment and ~~compensation~~ grid stability risks

Brazil’s national grid operator, ONS, has implemented emergency curtailment plans to manage an unprecedented surplus of renewable energy. This measure, described as an “exceptional” step to maintain system frequency, targets wind and solar generation to prevent imbalances caused by high output and lower demand. Following initial generation cuts, the Brazilian Ministry of Mines and Energy announced that 1,539 wind and solar photovoltaic plants filed for compensation. These requests cover approximately 53 GW of installed capacity, representing about 91% of the 56 GW considered eligible for the period between September 1, 2023, and November 25, 2025. The government is negotiating reimbursements, potentially totaling R$ 3.3 billion, in exchange for companies withdrawing legal actions. In August 2026, ONS activated its Surplus Management Plan for the distribution network for the second time that ~~year, following a similar action in June.~~ year. The restriction, which occurred on August ~~23 between 11:00 and 13:30,~~ 23, targeted Type 3 generation plants connected to distribution networks, including small hydroelectric plants, biomass, and small-scale wind and solar projects. The ONS noted the action affects distributors rather than end consumers. The surge in distributed generation, which accounted for 37.6% of national demand in August 2025, has increasingly challenged grid stability. To address this, ONS is developing the Regional Generation Relief Scheme (Erag) to automatically disconnect parts of distributed networks. Alexandre Zucarato, Planning Director at ONS, stated that increasing power generation during ~~critical periods. A pilot project for Erag is expected~~ daylight hours “no longer makes sense,” as new capacity often merely displaces existing available generation. New challenges have emerged regarding unauthorized solar expansion. ONS suggests that by ~~the end~~ 2025, at least 14 GW of ~~2026, with~~ photovoltaic power could be operating irregularly, a volume comparable to the ~~system capable~~ Itaipu Hydroelectric Plant. Vinicius Gibrail of ~~cutting up~~ TÜV Rheinland South America noted that failing to ~~3 GW~~ communicate capacity increases to Aneel is illegal and can result in ~~three stages of 1 GW each.~~ costs for other consumers, similar to “traditional electricity theft.” Structural challenges persist as the ~~rapid expansion of renewables concentrates generation during daylight hours, often merely displacing existing available capacity. This imbalance, alongside the~~ transition toward a free ~~market, has created economic sustainability~~ market poses financial risks ~~for~~ to distributors, who face difficulties passing on fixed costs while losing commercialization revenue.

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