Markets & Operations

System Information

Exceptions to Three Percent Three Pivotal Supplier Test Threshold XLS
Historical Area Control Error Data
Potential Transmission Switching Options
Critical Energy Infrastructure Information
Emergency Procedures
Real-Time Operational Data - This page includes locational marginal pricing, transfer limits, instantaneous load and transmission constraints
Historical Load Data
Seven-Day Load Projections & Constraint Forecast
Historical 1800 Load Forecast
Long-Term Firm Transmission Service Requests - system impact studies
Day-Ahead Interface Flows & Limits

Generation Outlet Interfaces

PA Central:  PDF CSV 

Special Protection Scheme (SPS/RAS) Installation/Removal

Homer City RAS Retirement
The Homer City RAS is expected to be retired and removed by the end of 2023. The RAS is no longer operational.

Procedural Updates

The following procedure will be included in the upcoming Manual-03 publication:
Wescosville Switching Procedure PDF

Thermal Ratings

Ratings Information
Manual 3: Attachment F Short-Term Emergency Line Ratings XLS
Common Trench Cable Ratings XLS

Voltage Limits

PJM RTO & Transmission Owner Voltage Limits CSV

Automatic Sectionalizing Schemes

Manual 3, Attachment E:
Automatic Sectionalizing Schemes Pending Approval & Recent Changes PDF
Automatic Sectionalizing Schemes PDF

Transmission Facilities Information

Reliability & Markets Tariff Facility Modifications
Approved or Denied for 6.1.2024 | 6.1.2023 | 6.1.2022 | 6.1.20206.1.2019 | 6.1.2018 XLS
To be Effective:
June 2024 as Proposed by Transmission Owners - 1.8.2024 XLS
June 2024 as Proposed by Transmission Owners - 12.1.2023 XLS
June 2023 as Proposed by Transmission Owners - 1.5.2023 XLS
June 2023 as Proposed by Transmission Owners - 12.1.2022 XLS
June 2022 as Proposed by Transmission Owners - 3.2.2022 XLS
June 2020 as Proposed by Transmission Owners - 1.31.2020 XLS
List of Designated Network Resources
Transmission Facilities 
Complete Descriptions CSV
Outage Information
Regional Transmission Expansion Plan Construction Status

Transmission Outage Cancellation & Rescheduling After Day-Ahead Market Metrics

2024 | 20232022202120192018 PDF

EMS Model Builds

Any schedule changes will be sent to DMS Members and posted on the Web Calendar.

Schedule PDF