Dominion Energy Energizes 500 kV Substation to Power Northern Virginia Data Centers
Dominion Energy has energized a 500/230 kV bulk transmission substation featuring 3 autotransformers rated at 750 MVA each to deliver 2500 MW of dedicated electrical capacity to Northern Virginia computing clusters.
- Publish date: 2026-10-02
- Category: HVDC & Substations
- Original source: Dominion Energy News Desk
- Reading time: 1 min
Data Center Load Serving Transmission Node
The high-density substation facility occupies 18 acres in Loudoun County and connects into 500 kV bulk transmission lines via breaker arrangements.
3 autotransformers rated at 750 MVA each step down bulk voltage from 500 kV to 230 kV, feeding 10 dedicated underground feeder lines.
Continuous Monitoring and Grid Reliability
Comprehensive fiber optic sensor networks monitor transformer core condition, oil moisture, and hotspot temperatures every 10 seconds.
The transmission upgrade delivers 2500 MW of power capacity to maintain system security demanded by digital infrastructure.