May 19, 2026
Why AI Data Centers Need Dedicated Substations
Summary: Data centers are known power hogs. But they are even more power-hungry when their primary focus is AI. To facilitate construction and accommodate AI's growth, developers and utilities are working together to build new data centers and dedicated substations to power them.
The North Dakota Public Service Commission recently approved a project that will see a new substation built within close proximity to an AI data center already under construction. Minnkota Power Cooperative is behind the $110 million project near Fargo. The cooperative is overseeing construction and will own and operate the facility.
This project is not a one-off. As our appetite for data increases, the demand for new data centers increases commensurately. And as you might expect, the drive toward AI has only pushed our data needs higher. Americans should expect to see a whole wave of new data centers being built over the next few years. All those data centers will need power, thus the need for new substations to feed them.
An Unprecedented Strain on the Grid
When the typical consumer uses AI to draw an image or write an email, there is little understanding of just how much computing power that requires. AI is both data- and power-hungry. So much so that the push to introduce AI into nearly every aspect of our digital lives is putting an unprecedented strain on the power grid.
The sheer amount of power required by an AI-driven data center is unimaginable to most people. That power needs to come from somewhere. So to meet data center needs, utilities are leaning toward building independent, dedicated substations capable of handling data center super-loads.
Still, building a private substation for a single commercial project is a massive and expensive undertaking. But it is becoming a mechanical and financial necessity with no clear alternatives for data center owners and local utilities to consider.
Managing the Super-Load
A standard data center is pretty power-hungry on its own. But one built primarily to handle AI tasks can consume much more. Hundreds of megawatts of electricity – which is enough to power tens of thousands of homes – is not unheard of. Unfortunately, traditional utility infrastructure isn't equipped to handle the work. The sudden, massive increase in power demand at a data center's single point is simply not manageable.
Utilities are discovering that the best way to handle a data center's super-load is to build an independent substation. In so doing, developers can:
Improve Power Quality – Data centers require 'clean', stable power. At the same time, their servers and cooling fans can create electrical noise that negatively impacts the rest of the community. Building a dedicated substation solves this problem through specialized filtering and voltage regulation.
Create Redundancy – A dedicated substation is usually built with multiple high-voltage feeds for redundancy purposes. Even if the primary utility line fails, the data center remains online. This is critical for an AI provider that can't afford even a few seconds of downtime.
Dedicated substations built to serve AI data centers can play a critical role in stabilizing local grids. Yet as helpful as they are, they do come with drawbacks.
The Bill Has to Be Paid
Questions arise whenever a new infrastructure project is proposed. In the case of a high-voltage substation and its subsequent transmission lines, cost is one of the first considerations. Who is going to pay a total bill that can easily exceed $100 million?
An ideal agreement would dictate that the data center developer foots the bill. Construction costs are not passed on to general rate payers. Utilities need to be clear about this distinction in order to assuage public fears. By requiring large-load customers to pay for their own infrastructure, the local utility can expand its capacity without forcing residential customers to subsidize private tech endeavors.
However, the truth is that not all projects work this way. Sometimes residential ratepayers are forced to foot the bill – either partially or in full. But each project is unique. There are multiple ways to cover construction costs without burdening residential customers.
Grid Reliability and Other Public Concerns
Questions about cost are just the tip of the iceberg. Unfortunately, data center and substation projects tend to be controversial in local communities. It is partially because people just don't like change. But it is also partially because of valid concerns local residents have whenever a massive new power consumer moves in. Those concerns include:
Grid Capacity – A dedicated substation certainly eases the burden on local infrastructure, but it does not change the source of a data center's electricity. All the power that feeds a local area comes from the same place. So there are concerns that massive data centers and their substations will sap power from other important projects.
Environmental Impacts – Local residents often fear that the disproportionate power demands represented by data centers will force utilities to keep older power plants and substations running. They are concerned about the environmental impacts of doing so.
Local Aesthetics – Projects also tend to raise concerns about local aesthetics. Residents worry about the noise pollution from massive cooling systems and AI servers. They worry about the potential impacts on property values when future buyers decide they do not want to live near industrial-looking structures.
The North Dakota project mentioned at the start of this post gained approval with very little discussion. It seems that everyone involved is satisfied. At the very least, no one is dissatisfied enough to try to stop the project. The same cannot be said for similar projects in other parts of the country.
It's a Balancing Act
Building new data centers and dedicated substations is a balancing act for both industries. On the one hand, the data center industry has no choice but to continue building if it hopes to keep up with the rising demands AI is placing on nearly everything. They also know that consumers want AI, even if they don't want new data centers in their backyards.
On the other hand, data center and substation construction comes with a full slate of challenges and complexities. Some projects may prove to be money poorly spent once all is said and done. Developers need to tread very lightly and hope that all their research and plans will pay off.
FAQs
Can't a data center just connect to existing power lines?
In theory, yes. But an AI-centric data center can have power needs as high as 200MW+, overwhelming local distribution to the point that local homes and businesses are impacted.
How is the grid impacted if a data center substation shuts down?
Developers tend to build dedicated substations with sophisticated relays and load-shedding controls. If the data center suddenly stops drawing power, these controls prevent frequency spikes, outages, and other problems.
Does building a new substation translate into higher residential rates?
Though there are exceptions to every rule, the costs of most projects are not passed on to local ratepayers. Data center developers foot the bill.
How long does it take to build a dedicated substation?
On average, the timeline runs 12 to 24 months from approval to operation. The biggest concern is the amount of lead time for obtaining certain components, like high-voltage transformers.
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