Infrastructure Explained · No. 02
How a Data Center Microgrid Works
One controller, several resources, two operating modes.
The Intelligent Infrastructure Review · August 1, 2026 · 4 min read
A microgrid is a defined set of generation, storage, and load that can run connected to the utility or separated from it. The equipment matters less than the controller: it decides, second by second, which resource serves the load and when to island the site.
Diagram
Infrastructure Explained · No. 02
The Intelligent Infrastructure Review
How a Data Center Microgrid Works
The same system in both operating modes. The controller and the point of common coupling determine the transition.
Grid-connected mode
Utility serves base load. On-site resources shave peaks, follow price signals, and stay ready.
Utility service
Microgrid controller
Solar and storage
Data center load
Islanded mode
The point of common coupling opens. On-site resources carry the load until the grid is stable again.
Utility disconnected
Microgrid controller
Storage and generation
Prioritized load
Key takeaways
What to carry out of this
- 01
A microgrid is defined by its boundary and its controller, not by any single technology inside it.
- 02
Islanding is a controls and protection problem before it is an equipment problem.
- 03
Sizing follows the load you must carry and for how long — not the peak of the whole facility.
- 04
The same assets can serve resilience, demand management, and utility programs, but the priorities have to be set in advance.
The decision-maker question
Which loads must survive an outage, for how many hours, and who has confirmed that number?
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