AES Ohio (NYSE:AES) presented the PJM Transmission Expansion Advisory Committee on Dec. 6 with a $145.1 million supplemental project to build two new substations and 13 miles of double circuit 345-kV lines to meet over 1,000 MW in expected load growth from electric vehicle manufacturers in the Jeffersonville area. The area is currently only served by a radial 69-kV extension.

The proposed solution would expand the planned $27 million Madison substation, which is to be built along the Green-Beatty 345-kV line, with a new 345-kV substation. The expansion would step down to 69 kV to feed into the South Charleston substation and also have four 345-kV line exits.

The Fayette Substation would become the primary source for the region, stepping down from 345 kV to 138 kV and 69kV. It would include a quarter-mile 138-kV extension to serve a 140-MW committed development. It is estimated to cost $33.9 million. Adding 13 miles of double circuit lines to connect it to the Madison substation would cost an estimated $51.2 million.

“This substation is located central to the largest developing load center in the AES Ohio area supporting the electric vehicle manufacturing industry developing in the area,” the AES presentation says.

A 69-kV line from the Fayette substation would run approximately 1.5 miles to the new Panther substation, which is proposed to replace the existing Jeffersonville 69-kV substation — which is located in a floodplain and impractical to expand any further. The new substation, designed as a “69-kV breaker and a half station” would step down to 12 kV.

The Panther substation comes with a projected $15.5 million cost, while the 69-kV line and rerouting around 5.5 miles of lines from Panther to the existing Octa substation, which was previously connected to the Jeffersonville substation, is estimated to cost $17.5 million.

The project would add to an existing supplemental project, S0323, that would construct a 69-kV line from South Charleston to Jeffersonville. AES said the expected load exceeds the capabilities of that line.

Other Supplemental Projects

• PECO (NASDAQ:EXC) has proposed to upgrade obsolete relays, communication and metering equipment, as well as remove a wave trap on the Heaton-Jarrett line in Montgomery County, Pa. The estimated cost is $1.77 million with an in-service date of April 1, 2023.
• Dominion Energy (NYSE:D) has identified three facilities with low voltage issues caused by a contingency with the loss of two lines in Norfolk, Va.
• Dominion submitted a distribution point request for a new substation, which would be named Edsall, servicing a total load of approximately 100 MW in Fairfax County.
• Dominion also submitted a request for a distribution request for a new substation, to be named Tropical, serving a data center campus with a load over 100 MW in Henrico County. The requested in-service date is Jan. 1, 2025.

Generator Deactivation Update

PJM has determined that there are no reliability concerns associated with a deactivation request from a 14-MW Lorain County landfill facility, which has requested to go offline on April 1, 2023, according to Phil Yum of PJM’s system planning modeling and support department.