Ratings Information
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
| 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
| 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