Markets & Operations

Ratings Information


NERC Alert Ratings TXT

Ratings

The Ratings text report provides the current ratings for all reportable facilities within the PJM operational footprint. The current ratings are obtained from the PJM Energy Management System and are changed to reflect system conditions.

Ratings TXT
Winter/Summer Seasonal Ratings PDF

Ratings Format

Column Name Column Definition
Company Abbreviation of the Transmission Owner.
Substn PJM name used to reference the substation for the equipment. For lines, the station shown will usually be the first alphabetic station name. (Ex. A line going from station ABCDEFGH to IJKLMNOP would be listed under ABCDEFGH.)
kV The voltage level.
Dev Abbreviated equipment name.
End END A or END B of the line.
Descr Longer description of the equipment name.
Degf Temperature set in degrees Fahrenheit.
Norm Continuous rating under normal operating conditions.
Long Long Term Emergency (LTE) rating.
Shrt Short Term Emergency (STE) rating.
Dump Load Dump (LD) rating.

Each temperature level has a separate set of ratings for day and night time operations.

Additional information on PJM operations related to thermal violations can be found in PJM Manual 03: Transmission Operations PDF.

Temporary Ratings

The Temporary Ratings report encompasses rating changes with limited durations, typically less than six months. The report contains active temporary changes as well as future changes. The estimated dates are provided to indicate when the temporary ratings are in effect. The facilities will revert to their permanent ratings upon the completion of the temporary rating change.

Temporary Ratings TXT

Temporary Ratings Format

Column Name Column Definition
Company Abbreviation of the Transmission Owner.
Substn PJM name used to reference the substation for the equipment. For lines, the station shown will usually be the first alphabetic station name. (Ex. A line going from station ABCDEFGH to IJKLMNOP would be listed under ABCDEFGH.)
kV The voltage level.
Dev Abbreviated equipment name.
End END A/END B for a LINE or HIGH/LOW for a XFMR.
Descr The equipment name which describes the facility.
Reason The reason for the ratings change. Available choices can be found in the Reasons for Rating Change text report.
Start Active changes: Date and time the ratings were made effective.
Future changes: Estimated date and time the ratings will be in effect.
The date is in the MM/DD/YYYY format. The time is in 24 hour format.
Est. End Estimated date and time the ratings are scheduled to end.
The date is in the MM/DD/YYYY format. The time is in 24 hour format.
Status The current status of the temporary rating request. The following statuses are displayed in the report: Active, Approved, and Awaiting Approval.
Degf Temperature set in degrees Fahrenheit.
Norm
Long
Shrt
Dump
Continuous rating under normal operating conditions.
Long Term Emergency (LTE) rating.
Short Term Emergency (STE) rating.
Load Dump (LD) rating.

Each temperature level has a separate set of ratings for day and night time operations.

Additional information on PJM operations related to thermal violations can be found in PJM Manual 03: Transmission Operations PDF.

Reasons for Rating Change

The Reasons for Rating Change report contains a list of the available reasons that can be selected for a rating change. PJM requires each rating change request to contain a reason for change. Reasons are periodically added and retired based on operational needs.

Please note that these reports are updated on a daily basis.

Reasons for Rating Change TXT