Large loads are being handed the obligations generators always had

Victoria Shinder27 September 2026, 19:422 min read

For most of the grid's history, customers had one obligation: pay the bill. Generators had many - stay online through faults, follow instructions, pay for the connection they need. This week's material shows that line moving for the largest loads.

Technical obligations. PJM has proposed that data centres and other large computing loads must ride through normally cleared transmission faults instead of disconnecting. The trigger was 22 July, when nearly 4,000 MW of data-centre load in northern Virginia dropped to backup generation in seconds; it was the third such event in two years. That is the ride-through duty generators have carried for decades, now applied to demand.

Cost obligations. In Oregon, Pacific Power has agreed that new data centres will pay for the new generation, storage, upgrades and market purchases needed to serve them, even where other customers also benefit. Under the state's POWER Act, data centres are a separate rate class. It is the same principle that has long applied to a generator's connection: you pay for what your arrival requires.

Planning weight. Wood Mackenzie's latest US storage monitor says data-centre buildout is lifting the outlook in every segment. When forecasts for a whole technology are built on one kind of customer, that customer is no longer background demand; it is a planning input.

Why it is happening now

Scale is the answer. A single campus can now draw as much as a large power station produces, and a cluster of them behaves as one very large, very fast-moving element of the system. Protection settings chosen to keep servers safe can trip gigawatts at once, and a load that arrives faster than generation can be built forces choices about who funds the new plant.

What to watch

The details will decide whether this works: how strict PJM's thresholds are and how fast existing sites must comply when it files with FERC in November; whether Oregon's regulator approves Pacific Power's settlement on 13 November and whether an appeal follows. The direction is already visible. A customer large enough to move the system is being asked to behave like part of it.