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Markets & Operations

System Operations

PJM works behind the scenes to ensure the reliability of the power grid and to keep the lights on. System Operations is responsible for managing the transmission and distribution grid. PJM coordinates and directs the operation of the region’s transmission grid. Power grid operators at PJM make real-time decisions that balance electricity supply and demand to keep the lights on. PJM performs “what if” scenarios all day long to assess conditions based on data from hundreds of thousands of points on the grid every four seconds.

Operations Summary



Forecasted Generation Outages
Wind Generation:
20172016 | 2015 | 2014 | 2013 | 2012XLS
Wind Power Graph
Generation & Extra High Voltage Losses
Capacity by Fuel Type: 2016 | 2015 | 2014PDF
Dynamic Transfer - generators outside of PJM footprint wanting to deliver output into PJM territory
Tie Lines - connect two or more balancing authorities or transmission zones of an electric system


Off-Cost Operations
Outage Analysis Reports - For use by Transmission and Reliability personnel only. Request access to obtain outage analysis reports information.  Further details on the Outage Analysis Reporting SitePDF.
Transmission Facilities

RTO Transfer Limit & Flows

20172016 | 2015 | 2014 | 2013 | 2012 | 2011XLS


Top 10 All Time Summer/Winter Peak Load DaysXLS
Load Forecasts  
Hourly Load: Preliminary | Estimated | Metered


Actual/Schedule Summary Report:
20172016 | 2015 | 2014XLS
Real-Time Scheduled Interchange

Contact PJM

Website Feedback
(866) 400-8980
(610) 666-8980
Member Relations

New to System Operations?

Transmission ZonesPDF (2.45MB)
Interregional Data Map


How system operations work in PJM
Find Upcoming Training
Operator Seminar
Generation Operator Fundamentals
Fundamentals of Transmission Operations
How PJM Operates & Dispatches
Power System Fundamentals
Conservative Operations
Generation Basics
Load Forecasting & Weather
Transmission Planning, Modeling & Energization


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M-1: Control Center & Data Exchange Requirements
Current | RedlinePDF
M-3: Transmission Operations
CurrentRedlinePDF Sections 1-3
M-3A: Energy Management System (EMS) Model Updates & Quality Assurance (QA)
Current | RedlinePDF
M-10: Pre-Scheduling Operations
M-11: Energy & Ancillary Services Market Operations
Current | RedlinePDF
M-12: Balancing Operations
Current | RedlinePDF
M-13: Emergency Operations
CurrentRedlinePDF Section 5
M-14D: Generator Operational Requirements
CurrentRedlinePDF Sections 1-4, 6-11
M-36: System Restoration
Current | RedlinePDF
M-37: Reliability Coordination
M-38: Operations Planning
Current | RedlinePDF
M-39: Nuclear Plant Interface Coordination
Current | Redline (PDF)
M-40: Certification & Training Requirements
Current | RedlinePDF