Where you can connect to the Rede Básica — by substation, with official data
Transmission access became a periodic competitive process (PNAST, Decree No. 12.772/2025). CONEXÃO delivers today, by SIN (the national grid) substation: TUST (transmission tariff) by busbar, transformation capacity and the progress of Access Seasons — everything with source and date, nothing estimated. SINtegre injection margins on 621 of 1.710 Operation Network busbars; each page declares source and date.
931
Operation Network substations
1.710
mapped busbars
1.305
busbars with TUST 2025/2026
20,3 GW
admitted in the 1st Access Season
Frequently asked questions
- How many Operation Network substations and busbars are in CONEXÃO?
- CONEXÃO covers 931 substations in Brazil's National Interconnected System Operation Network. These facilities are associated with 1.710 busbars because one substation can contain more than one electrical node.
- Where can I check a substation's TUST by busbar?
- TUST can be checked by busbar on CONEXÃO's substation records. The database contains 1.305 busbars with TUST for the 2025/2026 cycle; a missing published value does not mean that the tariff is zero.
- How many busbars have SINtegre injection margins available?
- SINtegre injection margins have been transcribed for 621 of the 1.710 registered Operation Network busbars. Values are shown by busbar, with their source and date, and are not estimated by CONEXÃO.
- How much capacity was admitted in the first 2026 Access Season?
- The first 2026 Access Season admitted 20,3 GW across 367 registrations. The total comprises 14,56 GW of generation and 5,74 GW of consumption.
1st Access Season 2026 — upcoming milestones
full calendar (in Portuguese) →- 04/09/2026Início do período de desistência e declaração de MUST mínimo / intenção de participação em todos os produtos (12h00)
- 11/09/2026Limite para desistência e declarações (12h00)
- 16/09/2026Notificação do resultado da etapa de Habilitação
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