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
CPL-DOM:  PDF

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
Red Lion TX50
DPL has informed PJM that the 500/230KV TX50 transformer at Red Lion has been off-putting gas. The transformer will be taken out of service until it can be replaced, which is estimated to be in June 2029. Until then, the transformer will be used as a hot standby that can be energized in an emergency only.
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
PEPCO:
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 6.1.2025 | 6.1.2024 | 6.1.2023 | 6.1.2022 | 6.1.2020 | 6.1.2019 | 6.1.2018 XLS
To be Effective:
June 2025 as Proposed by Transmission Owners - 12.19.2024 XLS
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

2025 | 2024 | 2023 | 2022 | 2021 | 2019 PDF

EMS Model Builds

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

Schedule PDF