Special Notices

In an effort to enhance transparency, PJM System Operations is sharing its internal Operating Memo (OM) PDF that is used for guidance to commit long lead generation for transmission congestion in light of recent unit deactivation notifications in the Baltimore Gas & Electric (BGE) transmission zone.

On 11.17.2023, DPL provided PJM with updated ratings on multiple transmission facilities following comprehensive system inspections, including the ratings on the Piney Grove 230/138kV transformer and New Church – Oak Hall 13765 138kV line. DPL is developing a plan for the impacted transmission facilities, beginning with the New Church – Oak Hall 13765 138kV line and Piney Grove 230/138kV transformer. DPL will implement the actions for the New Church – Oak Hall 13765 138kV line and will restore the permanent ratings at the completion of eDART 1146804. The mitigation work on the Piney Grove transformer will begin in mid-December and will partially restore the ratings at the completion of eDART ticket # 1148478.

The Piney Grove AT20 ratings below will be applicable at the completion of eDART 1148478.

On 4.27.2022, the transmission owner of the Silver Run-Hope Creek 230 kV line is able to revise the temporary ratings of the line. The transmission owner still plans to repair the damaged cable during a scheduled outage in the fall of 2022 (eDART #993622). It is expected that the line will return to its original ratings after the #993622 outage.

Silver Run-Hope Creek 230 kV line temporary ratings starting 4.27.2022 PDF

Silver Run-Hope Creek 230 kV line temporary ratings starting 4.29.2022 PDF

Dominion Energy Virginia Application for NITS PDF

On 6.10.2021, the Silver Run-Hope Creek 230 kV line tripped due to a submarine cable failure. The line was returned to service on 6.18.2021 with reduced ratings. The transmission owner is planning to repair the damaged cable during a scheduled outage in the fall of 2022 (eDART #993622). It is expected that the line will return to approximately its original ratings after the #993622 outage.

Silver Run-Hope Creek 230 kV line original ratings before the cable failure on 6.10.2021 PDF (updated 2.22.2022)
Silver Run-Hope Creek 230 kV line reduced ratings since 6.18.2021 PDF

First Energy recently completed a comprehensive review of BES facility ratings for all its 5 operating zones: ME, JC, PN, FE, APS. The review included field walkdowns of installed equipment, back-office reviews of prints and other source documentation, and verification of all BES substation equipment and transmission ratings against established company equipment and facility methodologies. Implementation schedule for the new ratings is as follows:

November 3, 2021: FE-East (ME, JC, PN) XLS
November 10, 2021: FE-West (FE) XLS
November 17, 2021: FE-South (APS) XLS

Pepco Holdings recently completed a comprehensive review of BES facility ratings for all its 3 operating companies: Pepco, Delmarva Power, and Atlantic City Electric. The review included field walkdowns of installed equipment, back-office reviews of prints and other source documentation, and verification of all BES substation equipment and transmission ratings against established company equipment and facility methodologies. The review results were presented to the PJM Planning Committee meeting on May 11, 2021 and the Operating Committee meeting on May 14, 2021.

List of PHI Facilities Affected by This Review and Their New Ratings

ComEd Switching to Ambient Ratings
ComEd will stop using seasonal ratings and begin using ambient ratings. The changeover is scheduled to occur on Monday, December 21, 2020 at 10:00 EST. Please refer to the Ratings Information page to view the ambient ratings for the ComEd facilities. The 50-Day rating will be used to represent the seasonal Winter rating, until the changeover occurs on Monday, December 21, 2020.

On Monday July 13, 2020 both MISO and PJM will disable constraint relaxation for Market to Market coordinated flowgates in accordance with the MISO-PJM Joint Operating Agreement. This date is subject to rescheduling based on system conditions on July 13th.

PPL Electric Utilities recently updated its ratings methodology. The updated methodology incorporates substation minor equipment limitations, such as bay conductor, down comer and bus conductor, as part of the overall facility ratings. The ratings methodology was presented at the PJM Planning Committee Meeting on Oct 17, 2019 PDF.

List of Facilities Affected by This Change PDF

Effective 12:00:01 EPT (or 16:00:01 GMT) on April 1, 2020 both MISO and PJM will disable constraint relaxation for Market to Market coordinated flowgates in accordance with the MISO-PJM Joint Operating agreement.

This document describes the methodology followed to evaluate external resources against the PJM Pseudo-Tie Electrical Distance Qualification Test.

This document describes the methodology followed to evaluate external resources against the PJM Pseudo-Tie M2M Qualification Test.

Additional pseudo-tie information

The Spurlock–Renaker, Spurlock-Stanley Parker, Spurlock-Stuart, and Spurlock-Meldahl Dam lines in EKPC zone are scheduled to be out of service in March and/or April 2019 under eDART tickets 797401 and 797407. These outages, in conjunction with tickets 701460 and 701476, are needed for clearance to relocate and decouple the double-circuited Spurlock - Maysville Industrial Tap 138 kV & Spurlock - Flemingsburg 138 kV line segments. The upgrade is under RTEP b2614 which has a required in-service date of June 1, 2019.

eDART tickets 797401 and 797407 are currently not “on-time” due to the timing of the outage submittal. In order to meet the RTEP in-service requirement date of June 1, 2019, these two tickets are marked as emergency outages under Manual-03 Section 4.2.9.1. PJM is approving the outage requests associated with RTEP b2614 upgrade in order to complete the upgrade by the required in-service date. 2019 RTEP Status

For questions, please email Transmission Operations or call (610) 666-8289.

Project description and topology diagram  (requires additional CEII access)

The following document pertains solely to the PJM Pseudo-Tie M2M Qualification Test and contains preliminary results as of February 7th, 2019. Results identify physical external resources that pass the preliminary M2M Qualification Test and do not represent a list of resources that qualify as a PJM Pseudo-Tie resource. Additional criteria and information pertaining to Pseudo-Tie resources can be found on the PJM Dynamic Transfers web page.

PPL is in the process of upgrading the Siegfried substation. The work is under a supplemental project to install a new GIS bus. As part of the upgrade, the Siegfried 230/69 transformers are also being replaced with new transformers. Once the new transformers are in service connected to the new 230 kV bus, the old transformers will eventually be removed from service and retired. The work at Siegfried are under various outages posted on the OASIS Outage Information page

AEP has performed a comprehensive review of its transmission facilities ratings within the PJM footprint and determined that certain facilities should be de-rated. Please see the list of affected transmission facilities below. The revised ratings will be effective on October 3, 2018. Please refer to the Ratings Information page for the current ratings in effect for all facilities including these de-rated AEP facilities.