By Brazil Stock Guide – Brazil’s federal government has enacted a structural overhaul of how generators and large electricity consumers connect to the national transmission system with the creation of the National Transmission Access Policy (PNAST). The new framework abolishes the long-standing first-come, first-served queue model and replaces it with periodic competitive access cycles, linking grid entry directly to transmission planning.
Until now, access depended strictly on the order of protocol at the Operador Nacional do Sistema Elétrico, Brazil’s independent system operator that runs the power grid in real time. Regardless of project size, strategic relevance or system impact, the old logic allowed small or speculative projects to lock up critical grid points, distorted transmission planning and encouraged a rush of applications with weak financial backing. With the arrival of massive hydrogen and data-center projects demanding hundreds or even thousands of megawatts, the model effectively collapsed.
Energy and Mines Minister Alexandre Silveira said the overhaul restores predictability to investment and aligns the grid with Brazil’s energy-transition agenda. He said the new policy unlocks access, strengthens system reliability and positions the country as a priority destination for green-economy capital.
The reform was designed by Brazil’s federal Energy and Mining Ministry, responsible for national power policy, grid planning and energy-sector regulation, after the rapid expansion of wind and solar generation since 2019, the sharp growth of Brazil’s free power market and, since 2023, an explosion of access requests from large industrial loads. Those projects concentrated demand in regions where remaining transmission capacity had already narrowed.
Access Seasons
At the core of the new framework are the so-called Access Seasons — periodic windows in which the grid operator will analyze, in batches, all permanent grid-access requests and expansions of contracted transmission use (MUST). Whenever demand exceeds available capacity at a given connection point, projects will compete under technical and economic criteria.
The first Access Season must take place within ten months of the decree’s publication. From 2027 onward, at least two rounds per year will be required. Requests filed before the new policy remain subject to the old queue rules during the transition phase.
Planning and Guarantees
The policy strengthens the role of Empresa de Pesquisa Energética, which will now use the consolidated results of the Access Seasons as a direct input for future transmission-expansion studies. The decree introduces mandatory financial guarantees, formal demand-review mechanisms and voluntary de-contracting tools in congested grid hubs to curb speculation and improve planning credibility.
During the transition phase, consumers with ongoing access processes will have 45 days to submit financial guarantees. They may also reduce their declared MUST without losing their original queue position if access depends on future transmission expansions.
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