# State Grid Brazil Holding Advances Heavy Substation Works for 1,468 km ±800 kV Graça Aranha–Silvânia UHVDC Link

> State Grid Brazil Holding (SGBH) has achieved significant civil and engineering progress on the 1,468 km ±800 kV Ultra-High Voltage Direct Current (UHVDC) transmission link connecting the Graça Aranha converter station in Maranhão to Silvânia in Goiás.

- **Publish Date:** 2026-09-23
- **Category:** transmission-substations
- **Reading Time:** 5 min
- **Original Source Citation:** [State Grid Brazil Holding (SGBH) & ONS Brazil](https://www.stategrid.com.br/en/news/graca-aranha-silvania-800kv-uhvdc-advances-september-2026)
- **Tags:** State Grid Brazil, UHVDC, 800 kV, Brazil, ONS, Substations, Converter Transformers
- **Canonical URL:** https://voltformer.com/news/state-grid-brazil-graca-aranha-silvania-800kv-uhvdc-groundbreaking
- **Markdown Source:** https://voltformer.com/news/state-grid-brazil-graca-aranha-silvania-800kv-uhvdc-groundbreaking.md

## Largest Transmission Auction in Latin American History

Awarded under ANEEL Auction 02/2023 with an investment exceeding $3.6 billion, the project is engineered to evacuate 5,000 MW of wind and solar capacity from Brazil’s northeast region directly into the central-south industrial heartland.

Site grading and deep foundation pilings are progressing at the Graça Aranha sending terminal, where seven single-phase 800 kV converter transformers and high-capacity smoothing reactors will be installed.

## Technological Synergy with Brazilian Grid Backbone

Operating at ±800 kV, the link drastically cuts transmission line losses over its 1,468 km path across Maranhão, Tocantins, and Goiás compared to traditional 500 kV AC circuits.

Scheduled for commercial energization in 2029, the UHVDC bipole reinforces Brazil’s National Interconnected System (SIN) against regional drought cycles impacting hydroelectric reservoirs.

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