Planned Maintenance

Markets & Operations

Ancillary Services

Ancillary services help balance the transmission system as it moves electricity from generating sources to ultimate consumers. PJM operates several markets for ancillary services:

In both Day-Ahead and Real-Time

  • The Synchronized Reserve Market
  • The Non-Synchronized Reserve Market
  • The Secondary Reserve Market

In Real-Time only

  • The Regulation Market

 Learn more about ancillary services at the Learning Center.



Real-Time Ancillary Service Market Results

Day-Ahead Ancillary Service Market Results

Reserve Price Formation

Date
Historical Synchronized Reserve Events

Reserve Subzone Bus Mapping

Reserve Subzone Resource Mapping

Synchronized Reserve Offer Cap Penalty XLS
12.15.2023
Synchronized Reserve Deployment and Reserve Price Formation FAQ PDF
9.27.2023
Guidance for Resources with Synchronized Reserve Assignments during Synchronized Reserve Events PDF
6.21.2023
Reserves Procedure Memo PDF 5.18.2023
Changes to the EMS Reserve Element Communication PDF   9.20.2022

Zone Preliminary Billing Data

 
Non-Synchronized Reserve
RTO Synchronized Reserve
Secondary Reserve

Market-Based Regulation

Date
RTO Regulation Signal Data ZIP (452 MB)
1.22.2024
Regulation Two-Part Cost Based Offer: Battery/Flywheel Resources XLS
Other Resources XLS
 
4.16.2021
11.21.2022
Historical Market Data
 
Regulation Control PDF
8.29.2023
Generation Run Reason (GENRUNR) Values XLS
8.29.2023
Generator Voltage Schedule PDF
11.3.2022

Regulation Self-Test Signals

 
40-Minute Performance Score Template XLS
5.8.2024
Normalized Signal Test (after 1.30.2017)
Reg A | Reg D XLS
5.8.2024

Zone Preliminary Billing Data

 
PJM Regulation Zone

Regulation Performance Impacts Templates

Date

Black Start Service

 
Revenue Requirements  

Contact PJM


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

Training

How ancillary services work in PJM
Upcoming Training

Tools

Overview
Sign In | Register

Data Miner - access historical data

Learn More | Sign In

Markets Gateway

Learn More
Opportunity Cost Calculator

eDART

Learn More
Training Presentations

Manuals

 
M-10: Pre-Scheduling Operations
WEBCurrentRedline PDF Section 2
M-11: Energy & Ancillary Services Market Operations 
WEBCurrentRedline PDF Section 4
M-12: Balancing Operations 
WEBCurrentRedline PDF Section 4
M-14D: Generator Operational Requirements 
WEBCurrentRedline PDF Section 10
M-15: Cost Development Guidelines
CurrentRedline PDF Sections 2-11        
M-27: Open Access Transmission Tariff Accounting 
WEBCurrent | Redline PDF Section 7
M-28: Operating Agreement Accounting
WEBCurrent | Redline PDF Sections 4-7
M-36: System Restoration 
WEBCurrent | Redline PDF All Sections