Oracle Wisconsin Data Center Proposes $1.1B Grid Fix
American Transmission Company seeks state approval for a transmission device to stabilize sudden power swings from Oracle's 1.3-GW facility.
Updated on Nov. 13, 2026 in Data Centers
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American Transmission Company has proposed an E-STATCOM, a voltage-regulating device with storage, for Oracle's 1.3-GW Wisconsin data center, and Oracle has agreed to pay $1.1 billion for the transmission project pending approval from the Wisconsin Public Service Commission.
Why it matters
Sudden load shifts from data centers, including a summer fault in Virginia that disconnected nearly 4 GW, can strain transmission systems and trip facilities offline. Wisconsin residents and ratepayers may be affected by how the grid upgrade is approved and paid for.
The proposed E-STATCOM would keep load fluctuations under 25 MW over any five-second span at a 1.3-GW site, according to the filing. Whether the device performs as specified has not yet been tested at this facility, and the Wisconsin PSC has not ruled on the project.
The players
Oracle
Oracle is a multinational technology company that operates large cloud and data center infrastructure, including the 1.3-GW Wisconsin facility.
American Transmission Company
American Transmission Company is a Wisconsin electric transmission utility that filed the proposal for the E-STATCOM with state regulators.
The details
American Transmission Company filed with the Wisconsin Public Service Commission for an E-STATCOM at Oracle's data center site. The device combines voltage-regulating STATCOM technology with storage to absorb and release power, a capability batteries alone cannot match for this application. Oracle has agreed to foot the $1.1 billion cost.
Timeline
This summer: a transmission fault in Virginia caused nearly 4 GW of data center load to disconnect, and Dominion took about 10 minutes to stabilize the system.
Since 2023: ERCOT has identified more than 26 similar load drop-off events.
The Tech Race
The Wisconsin proposal follows Siemens Energy's construction of the world's only operating E-STATCOM in Germany and extends that device design to a US data center. An industry source expects a large wave of such devices to be deployed for data centers in and outside the US.
If approved, the cost of the transmission project is slated to be covered by Oracle rather than directly by ratepayers, according to the filing. Wisconsin electricity customers would see the grid stability effects mainly through reduced risk of large-scale disruptions tied to nearby data center load.
The takeaway
Large data center loads can destabilize the power grid within seconds, which makes grid-side safeguards a practical concern for any community hosting major AI infrastructure. Watching how the Wisconsin PSC handles this filing will show how such costs are assigned.
Further reading
For more on how facilities like this are reshaping regional power demand, see Data Centers.
Source note: This article includes information reported by Energy Central.
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