How to assess a grid connection point on the map
Explore electrical infrastructure, check available capacity margins and identify nearby projects to assess connection alternatives.
The ePowerBay map brings together information for an initial grid connection assessment. Follow these steps to explore the area and select the points that warrant a more detailed study.
1. Locate the project and infrastructure
Position the map over your area of interest. Under Transmissão → ONS, enable:
Subestação ONS
LT Corrente Alternada ONS
LT Corrente Contínua ONS, where relevant to the area.
Click on the facilities to view the available information and check the legend. Geographic proximity helps shortlist alternatives, but does not determine connection feasibility.
2. Examine the grid configuration
Follow the lines near the point being assessed and observe how the infrastructure is distributed across the area. Check the available voltage and facility identification data.
This view helps put the alternatives into context. The map representation alone does not establish available capacity or the feasibility of grid access.
3. Check capacity margins
Under Leilões → LRCAP → 2026 - UHE & UTE, select the Subestações Margem layer for your chosen year, from 2026 to 2031.
For storage, use Leilões → LRCAP 2026 - Armazenamento → LRCAP 2026 BESS - Margem de Escoamento.
Check the value, unit, year and study reference. The margin applies to the scenario assessed and does not guarantee grid access for every project.
4. Identify nearby projects
Under Geração → Projetos, enable the relevant layers:
UFV: UFV Operação, UFV Outorga and UFV DRO.
EOL: EOL Operação, EOL Outorga and EOL DRO.
Select projects to view their capacity, status and other available information. A DRO does not mean grid access is secured, and proximity does not confirm connection to the same substation.
For additional context, consult Transmissão → Acesso à Rede → Fila de Acesso à Rede - ONS.
5. Compare and investigate further
For each alternative, record:
Electrical infrastructure and grid configuration.
Capacity margin, year and reference.
Nearby projects and grid access requests.
Information that still needs confirmation.
Compare data from compatible scenarios. Use this initial assessment to decide where to focus further technical studies and connection cost analysis.
[Imagem 6 — Quadro simples comparando dois pontos de conexão.]