In what is being labeled a “landmark” and “historic” decision by the industry, the Texas Public Utility Commission approved a plan April 24 that allows ERCOT to authorize the region’s first extra-high-voltage transmission lines and meet the petroleum-rich Permian Basin’s rapidly growing power needs.
The PUC unanimously endorsed staff’s recommendation to construct three 765-kV import paths into the Permian Basin, where oil and gas electrification and data center announcements have significantly increased load projections. The 765-kV option, while 22% more expensive than the 345-kV option, will carry more than twice the voltage of existing infrastructure. (See PUC Staff Urges Approval of 765-kV Lines to West Texas.)
ERCOT and the transmission service providers (TSPs) have said the 765-kV lines can carry more power and meet higher demand levels as the state continues to grow. They can reduce congestion on existing transmission lines and could save money in the long term by eliminating the need to build additional lines.
The TSPs have been preparing certificates of convenience and necessity applications for the projects approved in the plan. “Now that the voltage decision [has been] made, they can begin filing those applications to get the process started,” spokesperson Ellie Breed said in an email.
“Our priority now is ensuring utilities execute these projects quickly and at the lowest possible cost to Texas consumers,” PUC Chair Thomas Gleeson said in a statement.
Staff said the current options have increased to $10.11 billion for 765 kV and $8.28 billion for 345 kV.
“This is really exciting for Texas, when you look back on monumental decisions that affect Texas,” Commissioner Kathleen Jackson said during the open meeting. “This will fit in those benchmarks, and we will look back and say this was one of those decisions.”
The PUC’s decision came after a monthslong review process that included three public workshops and three rounds of stakeholder feedback. Commission staff conducted a full analysis of the costs, equipment supply chains and project-completion timelines for both voltage options, gathering input from the public, equipment manufacturers and the transmission companies that will build and operate the new lines.
The commission’s order does not apply to ERCOT’s plans to add an EHV backbone to the rest of its system. The grid operator said it will work with the PUC and stakeholders to include the higher voltage in its study process.
ERCOT included a 765-study as part of its annual Regional Transmission Plan (55718). (See 765-kV Lines in West Texas Inch Closer to Reality.)
The Texas Advanced Energy Business Alliance (TAEBA) applauded the PUC’s decision, saying in an email the “historic vote” ushers in a “new era of grid modernization for the Lone Star State.”
“This decision brings ERCOT into the 21st century,” TAEBA Executive Director Matthew Boms said. “As electricity demand surges, we need a grid that’s built for the future — reliable, efficient and cost-effective. Today’s vote is a strong step toward that goal.”
American Electric Power trumpeted the fact that its Texas subsidiary will build one of the three import paths into the Permian Basin as part of a jointly assigned project. The 300-mile line will run from Fort Stockton to San Antonio.
AEP energized its first 765-kV operational transmission line in 1969 between Kentucky and Ohio. It now owns 2,110 miles of 765-kV facilities, more than any other system in North America, it said.
The commission also endorsed a petition approving assignments to the TSPs to own, construct and operate the Permian Basin projects (57441).
“I want to further clarify the commission is not deciding in this proceeding any requirement for a TSP’s CCN,” Gleeson said. “Those will be decided in the future.”
At the PUC’s direction, ERCOT filed its reliability plan for the Permian Basin in July 2024. The plan included the 345- and 765-kV import paths and a 2038 need date. The commission approved the plan in October 2024 but reserved a decision on the voltage level by May. (See Texas PUC Approves Permian Reliability Plan.)
4 Projects Added to TEF
The PUC approved staff’s recommendation to advance four generation projects, totaling more than 1,900 MW of capacity, to the Texas Energy Fund’s due diligence review.
The low-interest loan program, designed to add 10 GW in gas generation, has seen eight projects drop out or be removed in recent months (56896). (See 2 More Projects Fall out of TEF Loan Program.)
The projects belong to independent power producers Invenergy and Nightpeak Energy. Invenergy proposed two projects totaling 1,369 MW of capacity, and Nightpeak has applied for loans to cover 565 MW. That raises the TEF In-ERCOT Program portfolio to 18 projects, promising 9,218 MW and requesting $5.04 billion in loans. Texas lawmakers have already set aside $5 billion for the program.
“These are taxpayer dollars, and this is our program. We set the rules, and at the end of the day, you have to have the ability to repay, and you have to have the ability to execute,” Gleeson said. “Inherent in getting public funds is a trust from the public that they’ll be spent correctly, and I think our due diligence process is helping to ensure that.”
The commission also approved the first recipient of the TEF’s Completion Bonus Grant Program, which awards grants to companies that add at least 100 MW to the ERCOT grid through new construction or by expanding dispatchable generators that meet the TEF’s requirements.
The Lower Colorado River Authority is seeking $22.5 million in loans to help build the first of two 188-MW gas-fired units at its Timmerman Power Plant. The PUC can award LCRA a maximum of $120,000/MW (up to $22.5 million) if the unit connects to ERCOT before June 1, 2026. The facility will be tracked annually for 10 years and must meet specific performance and reliability measures and is available to ERCOT dispatch.
The unit is scheduled to reach commercial operations in 2025.
“It’s just good to see LCRA coming forward and taking advantage of this,” Jackson said. “It’s 10 years of oversight and performance, incentivizing them to be able to get the full grant.”
Braunig RMR Work Delayed
ERCOT staff told the commission that a crack in Braunig Unit 3’s boiler superheater header will require that the header be replaced, “significantly extending” the unit’s potential return to service as late as spring 2026 (55999).
CPS Energy found the crack during its maintenance outage, which began March 3 as part of the unit’s reliability must-run agreement with ERCOT. The San Antonio municipality announced in 2024 it would be retiring the 55-year-old gas unit along with Braunig’s other two units, but the Texas grid operator said it was still needed for reliability reasons. (See “RMR Contract for CPS Energy Unit Faces Increased Costs, Delays,” ERCOT Board of Directors Briefs: April 7-8, 2025.)
David Kezell, ERCOT’s director of weatherization and inspection, said a new super heater will have to be built specifically for Braunig 3. Ideally, he said, the unit could be operational for the 2025/26 winter. The superheater is expected to cost about $3 million.
“The budget is in reasonable shape,” Kezell said. ERCOT and the market already are on the hook for $45.85 million under the terms of Braunig 3’s RMR.
Kristi Hobbs, vice president of system planning and weatherization, said ERCOT conducted another analysis to determine whether to proceed with the investment in Braunig. Staff updated their models with load growth and generation studies since their previous study and came to the same result.
“We found that even with a delay, even if it’s delayed into February of next year, there is still more benefit than cost to moving forward with maintaining the Braunig unit,” Hobbs said. “We see the potential benefit really comes next summer in the July and August time frame … so we still see that benefit of moving forward with the work.”
ERCOT counsel Nathan Bigbee told the PUC that ERCOT had reached an agreement with LifeCycle Power, which owns 15 mobile generators that it has leased to CenterPoint Energy, and is proceeding with plans to move the units to San Antonio over the summer. He said cooperation is still needed between CenterPoint and CPS to “make this all work.”
“Having a fundamental structure in place for ERCOT and the LifeCycle arrangement will help facilitate those agreements as well,” Bigbee said. “This is not like anything else we’ve had before. We are leveraging the RMR framework for the dispatch, the settlement and the performance metrics for these generators.”
The generators, which can produce nearly 40 MW apiece, will be moved to San Antonio in groups of three. They will then be connected in strategic sites to the CPS distribution network.
In other actions that the PUC crammed into just over an hour before adjourning, the commissioners:
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- sided with staff’s recommendation to delay the first procurement for the proposed firm fuel supply service (FFSS) until the 2026/27 winter season. The generation service is still going through ERCOT’s stakeholder process; staff were also leery of “competing interests” coming out of the Texas Legislature, which ends in early June (56000).
- approved a joint application by CPS and South Texas Electric Cooperative for certificates of convenience and necessity for a proposed 345-kV project south of San Antonio. The PUC modified the proposed order by changing the project’s route, which is estimated to cost between $274 million and $390 million. The project is one of several that are part of the San Antonio South Reliability Project addressing a transmission constraint that led to the Braunig RMR. It will be built and owned 50/50 by CPS and STEC (57115).
- accepted CenterPoint’s request to recover more than $400 million in restoration costs from a series of storms in May 2024. The PUC approved $28.9 million in restoration costs and an additional $396.3 million in expenses to be securitized (57271). (See Texas Public Utility Commission Briefs: May 23, 2024.)
- agreed to AEP Texas’ $318 million, three-year system reliability plan that the company says will save about $71 million in projected restoration costs. About 80% of the plan involves replacing aging infrastructure with newer equipment designed to a higher standard that can better withstand extreme weather events, AEP said (57057).
- welcomed the city of Caldwell, between Houston and Austin, into the ERCOT system by approving an order integrating its 14 MW of load from MISO. The city reached an unopposed agreement with PUC staff, LCRA Transmission Services, Entergy Texas and the Office of Public Utility Counsel. ERCOT did not oppose the settlement (56164).