Works in Progress: Grid Connection Auctions

From Alex Tabarrok.

"The latest issue of Works in Progress is superb. Every article is interesting.

Chris Gillett points out something surprising: the US has plenty of electricity generation capacity ready to go, the problem is connecting it to the grid. Grid connection is complicated because on the grid, supply must equal demand at every moment in time. Even without speeding the process, however, we could get more power connected to the grid if we rationalized the ordering of connections.

The main flaw of the interconnection process is that it uses a first-come, first-served queue. This means that high-priority requests can spend years stuck at the back of the line behind other less important ones.

In essence, we have an airport congestion problem in which small Cessnas can bump 747s. Auctions for connection rights are the solution, as pointed out for airports by Vickrey and the classic paper by Rassenti, Smith and Bulfin. Gillett also emphasizes that some loads should be allowed to connect on a flexible basis: if a data center can disconnect or use backup power during the few peak hours each year, it should not have to wait years for firm service.

Gillett also has a very nice explanation of how market prices balance electricity from different sources:

Market prices signal to power plant developers about levels of supply and demand. In the same way, prices balance different energy sources based on the strengths and weaknesses of each. For instance, as more solar panels are built, the value (and therefore price) of power during the middle of the day, when the sun is shining most, adjusts downward. From December 2020 to September 2025, maximum solar output in ERCOT increased from 4 to 29.8 gigawatts. And from 2020 to 2025, the value of power at 1pm relative to the highest-priced hour decreased from 92.9 percent to 38.7 percent. As one technology type becomes overbuilt, prices reflect that and developers react accordingly.

The evolving daily price shape in response to the abundance of solar energy was a signal that the grid needed storage capacity, and power plant developers responded. From 2020 to October 2025, ERCOT went from having almost no battery storage to a combined battery discharge of 8.6 gigawatts. The same process has played out in California and many European markets."