PJM Board Approves Updates to Regional Transmission Expansion Plan


The PJM Board of Managers has authorized changes to the Regional Transmission Expansion Plan (RTEP) to help ensure the most efficient, economical and reliable supply of power for the 65 million people PJM serves across 13 states and the District of Columbia.

The PJM Board last week approved additional electric transmission system upgrades and one change to a previously identified project to meet PJM reliability and deliverability criteria. The RTEP updates accommodate New Jersey offshore wind state policy goals that are part of the FERC-approved State Agreement Approach, new baseline reliability projects elsewhere and the completion of 403 new System Impact Studies over the last year.

Offshore Wind Generation Interconnection

The New Jersey State Agreement Approach resulted in that state’s selection of Scenario 18a, Project b3737. Project components include:

  • Rebuilding the Atlantic-Smithburg 230 kV line from the Larrabee substation to the Smithburg substation as a double circuit 500/230 kV line
  • Expanding the Smithburg 500 kV circuit into a three-breaker ring bus
  • Expanding the Larrabee 230 kV circuit with a new breaker-and-a-half layout, re-terminating Larrabee to Lakewood 230 kV into the new terminal, and constructing approximately 1,000 feet of new 230 kV line from the Larrabee station to a 230 kV offshore wind-collector converter station
  • Expanding the Atlantic 230 kV bus and converting the substation to a new double-breaker with the existing line for offshore wind generators
  • Constructing a new 11.6 mile line from the Atlantic substation to a 230 kV offshore wind collector converter station at Larrabee

Baseline Reliability Projects

Other new baseline reliability projects in the PJM region include:

  • Rebuilding approximately 4.9 miles of the Abbe-Johnson No. 2 69 kV line and related improvements to switches, line drops and relays in the ATSI transmission zone
  • Rebuilding and reconductoring about 6.5 miles of the Avery-Hayes 138 kV line in the ATSI transmission zone
  • Rebuilding 6.7 miles of the George Washington-Kammer 138 kV line, removing existing six-wired steel lattice towers and supplementing right-of-way as needed in the AEP transmission zone
  • Installing two 500 kV 50 kA breakers, upgrading relays and other enhancements to the Black Oak substation in the AEP transmission zone
  • Relocating the Lackawanna T3 and T4 500/230 kV transformers in the PPL transmission zone

Change to Previously Approved Project

The PJM Board approved one change in scope and cost to a previously identified network upgrade as a result of updates to prior analysis. As a result, a baseline reliability project in the AEP transmission zone associated with the Conesville Unit 4 deactivation will replace 10 structures, modify three distribution poles, re-sag two spans of existing conductor and relocate an existing street light.

Interconnection Queue Projects

Throughout 2022, PJM continued to study new service requests submitted into the interconnection queue. In the last 12 months, PJM completed 403 new System Impact Studies. In all, 287 service requests were withdrawn.

How PJM Plans for the Future

PJM’s RTEP analysis identifies system violations to reliability criteria and standards, determines the potential to improve the market efficiency and operational performance of the system, and incorporates any public policy requirements. PJM then develops transmission system enhancements to be integrated into a regional solution set and reviews them with stakeholders through the Transmission Expansion Advisory Committee (TEAC) before submitting its recommendation to the Board.

Details of all approved projects are contained in the Transmission Expansion Advisory Committee recommendation (PDF) to the PJM Board. Follow all projects through the process with PJM’s Project Status & Cost Allocation tool.