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EDF's first Latin American transmission asset enters service in Brazil

EDF's first Latin American transmission asset enters service in Brazil

Built World

Açu Transmissora adds a 345 kV substation and 40 km of line to Brazil's national grid, built to serve the Port of Açu industrial complex

Today: Açu Transmissora reaches commercial operation

Overview

Updated 54 minutes ago

The Porto do Açu substation and 40 kilometers of 345-kilovolt line entered commercial operation on 5 November, four years after EDF power solutions won the concession at a Brazilian government auction. It is the first transmission asset the French utility group has operated in Latin America.

The line sections an existing link between the GNA I gas-fired plant and the Campos substation, adding grid capacity for the Port of Açu industrial complex in northern Rio de Janeiro state. EDF says the project was sized for large loads, including data centers and low-carbon hydrogen production, that the region is trying to attract.

Why it matters

Grid connections are the gatekeeper for new industrial load. This one decides whether Port of Açu can host data centers and hydrogen plants.

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Key Indicators

40 km
Transmission line length
345 kV lines sectioning the existing GNA I–Campos link, plus a new substation.
R$220M+
Announced investment
Figure given when construction began in September 2025.
1
First EDF transmission asset in Latin America
The group's first transmission concession outside Europe and Africa.
345 kV
Line voltage
Substation steps down to 138 kV for local distribution.
30,000 sq m
Coastal forest restoration area
Environmental program run with the Reserva Caruara reserve.

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People Involved

AS
André Salgado
Chief executive, EDF power solutions Brazil
Leading EDF's Brazilian generation and transmission business

Organizations Involved

EDF Power Solutions North America
EDF Power Solutions North America
Energy developer
Owner and operator of the Açu Transmissora concession

Subsidiary of the French state-controlled utility EDF, active in generation and now transmission in Brazil.
TR
Açu Transmissora
Transmission concessionaire
Operating under a federal concession

The concessionaire that built and runs the Porto do Açu substation and its connecting lines.
AN
Agência Nacional de Energia Elétrica (ANEEL)
Federal regulator
Ran the auction that awarded the concession

Brazil's electricity regulator, which auctions transmission concessions and sets the terms operators must meet.
ON
Operador Nacional do Sistema Elétrico (ONS)
Grid operator
Integrated the substation into the national grid

Brazil's national grid operator, which issues the operating instructions that bring new assets online.
GN
Gás Natural Açu (GNA)
Power generator
Operates the GNA I thermal plant connected to the new substation

Gas-fired generation venture at Port of Açu whose transmission link was reconfigured by the project.

Timeline

2022 November 2026

5 events Latest: Today
Tap a bar to jump to that date

  1. Açu Transmissora reaches commercial operation

    Today Commissioning

    EDF declares the substation and 40 km line fully operational, its first transmission asset in Latin America.

  2. Grid operator issues switching procedures

    Regulatory

    ONS operating message 404-R/2026 brings the Porto do Açu substation into the national grid's procedures.

  3. First circuit energized

    Energization

    EDF sections the first circuit of the Campos–GNA line, putting the asset into partial operation.

  4. Construction begins on the Oiti project

    Construction

    EDF announces more than R$220 million of investment and roughly 230 peak construction jobs.

  5. EDF wins the Açu transmission concession

    Auction

    EDF power solutions takes ANEEL Transmission Auction No. 002/2022 and sets up Açu Transmissora to build the project.

Scenarios

1

EDF wins a second Brazilian transmission concession

Possible Resolves by End of 2027

Discussed by: EDF power solutions executives, who have said they want to use this project to bid for larger ventures

The company has described the Açu asset as a platform rather than a one-off, and Brazilian transmission auctions recur annually. A second win would show the first project served as a credential with the regulator and with lenders.

2

Port of Açu lands an anchor data center or hydrogen plant

Uncertain Resolves by End of 2028

Discussed by: EDF and Rio de Janeiro state officials, who cite data centers and low-carbon hydrogen as the reason for the added grid capacity

The line was justified on future large loads, not current ones. A firm supply or connection agreement from a data center operator or hydrogen developer would convert that justification into contracted demand.

3

EDF's Brazilian transmission push stays at one asset

Possible Resolves by End of 2027

Discussed by: Analysts who note Brazil's auction returns have compressed as more foreign operators enter

Transmission auctions in Brazil have drawn heavy competition, and a single operating asset with a modest investment ticket does not guarantee a pipeline. If EDF skips or loses the next rounds, the Açu project stays a foothold rather than a business line.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

2001-2002

Brazil's rationing crisis (2001)

A drought cut hydroelectric output while generation and transmission investment lagged demand. The government ordered across-the-board consumption cuts to avoid blackouts.

Then

Consumers and industry cut power use under mandatory targets; the crisis dominated national politics.

Now

Brazil built out its auction system for generation and transmission, opening both to foreign operators under fixed concession contracts.

Why this matters now

The auction model that brought EDF into Brazil's grid exists because of that shortage. Açu Transmissora is one of its later outputs.

2014-2017

State Grid's Belo Monte transmission link (2017)

China's State Grid won the concession to build a long-distance direct-current line carrying power from the Belo Monte dam in Pará to southeastern load centers, then built and energized it.

Then

It was one of the largest transmission projects awarded to a foreign operator in Brazil.

Now

It established the pattern of foreign utilities using Brazilian auctions to enter the grid business, and made transmission a competitive international asset class.

Why this matters now

EDF is following the same route into Brazil, though at a far smaller scale: win a concession, build, operate, then bid for more.

2021

GNA I comes online at Port of Açu (2021)

The GNA I gas-fired plant began operating at Port of Açu, connected to the Campos substation by a 345 kV line.

Then

The plant anchored gas demand at the port and made the region a significant power node.

Now

Its transmission link became the piece EDF's project sections, adding a new substation between plant and grid.

Why this matters now

The Açu project is not a greenfield line to nowhere. It reconfigures an existing connection to a working generator.

Sources

(6)
+2
EDF power solutions EDF power solutions Brazil ONS Paranoá Energia EDF power solutions Brazil EDF power solutions Brazil