Markets & Operations

Data Dictionary

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Title Description Frequency Category
RPM Auction Results This page contains the results of the RPM auctions for each delivery year as well as well as other reports and modeling information. n/a RPM
Actual/Schedule Summary Report This spreadsheet contains actual, scheduled, and inadvertent flows by tie line by hour. It is posted annually. Annual Operations
Capacity by Fuel Type This document shows the breakdown of PJM generation capacity aggregated by fuel type. Annual Operations
Estimated Hourly Load Data Integrated hourly loads are calculated for each PJM Region from raw telemetry data and are approximate. The load data is calculated and posted when all transaction information has been confirmed with the market participants and the external control areas. n/a Operations
PJM Forecasted Generation Outages This file contains the megawatt totals of forecasted generation outages for the next three months. An expected megawatt total is listed for each day for the next three months, and broken down by sub-regions in PJM. Daily Operations
Historical Metered Load Data The "Historical Load Data" report summarizes the MW-Hour net energy for load as consumed by the service territories within the PJM RTO. Data is supplied by the respective PJM electric distribution companies (EDC) of PJM, and represents the best quality level of metered load within their zones. The report contains company submitted values, with PJM generated estimated values substituted where company data is unavailable. Monthly Operations
Operations Summary This data contains capacity and reserve status for the current day forecasted peak hour. Summaries of the previous day's load and dispatch rates are also provided. These summaries are based on data compiled at 0600 hours. Each file has a time stamp to show when it was updated. Daily Operations
Real-Time Scheduled Interchange These files contain the hourly PJM Net Tie Schedule for each day, as of the time posted. Daily Operations
Top 10 All Time Summer/Winter Peak Load Days This file shows the top 10 all-time peak load days and respective MW amounts for the Summer and Winter seasons. The load data is sourced from the Historical Metered Load Data. Varies by year Operations
7-Day Load Forecast This page has PJM's most recent load forecast, by region. Multiple times per day Real-Time Energy Market
Interregional Data Map The Interregional Data Map shows the flow of electricity into and out of PJM. The details are zone based showing the flow, Interfaces, prices and the real-time load (MW). 5 minutes Real-Time Energy Market
Marginal Fuel Data Data on the fuel types of marginal units in the PJM Real-time Energy Market. Marginal units are the units that set the Locational Marginal Price in each five minute interval. When there is congestion, there can be more than one marginal unit during a five-minute period. The data are at the hourly level. The share of each fuel in each hour is calculated based on the number of five minute intervals that a unit burning each fuel type is marginal or jointly marginal. Monthly Real-Time Energy Market
Marginal Value of Real-Time Transmission Constraints Annual Real-Time Energy Market
Monthly Real-Time Locational Marginal Pricing Hourly LMPs for all pricing points in PJM. Each file contains one month's worth of data. Separate files are posted for Real Time and Day Ahead. Monthly Real-Time Energy Market
Off Cost Operations This posting details the time and reason for off-cost operations. Monthly Real-Time Energy Market
Pnode by State Listing This file includes a list of Pnodes and what US State PJM believes the pnode to be in based on the available data. n/a Real-Time Energy Market
Preliminary Hourly Load Data Preliminary integrated hourly loads are calculated from raw telemetry data and are approximate. Daily Real-Time Energy Market
Real Time Transmission Constraints n/a Real-Time Energy Market
Wind Generation This posting shows the actual hourly wind generation in the PJM RTO. n/a Real-Time Energy Market
Black Start Revenue Requirements PJM generators’ annual black start revenue requirements as referenced in the PJM Manuals. n/a Ancillary Services
Day-Ahead Scheduling Reserve Preliminary Billing Data The monthly files contain hourly billing data for the Day-Ahead Scheduling Reserve Market. These values are for informational purposes only and are subject to change once actual settlement calculations are performed beginning in the October 2008 billing cycle. Hourly data includes: Day-Ahead Scheduling Reserve Market Clearing Price in $/MWh of day-ahead scheduling reserve provided; the total MWh of day-ahead scheduling reserve awarded in the Day-Ahead Scheduling Reserve Market; the RTO day-ahead scheduling reserve requirement in total MWh; the total day-ahead scheduling reserve obligation the total MW based on real-time load ratio share; and estimated day-ahead scheduling reserve charge rate ($/MW of load). Daily Ancillary Services
Regulation Preliminary Billing Data The monthly files contain hourly billing data for the PJM Regulation Market. These values are for informational purposes only and are subject to change through the fifth business day of the following month. Hourly data includes: PJM Regulation Market Clearing Price (RMCP) in $/MWh of regulation provided; additional payments made to PJM Regulation Market pool-scheduled regulation providers to ensure that their offer plus opportunity costs are made whole; the total MWh of regulation purchased in the PJM Regulation Market; the total MWh of regulation self-scheduled in the PJM Regulation Market; and the total MWh of regulation pool-scheduled in the PJM Regulation Market. Daily Ancillary Services
RFC Synchronized Reserve Zone Preliminary Billing Data The monthly files contain hourly billing data for the ReliabilityFirst Corporation (RFC) Synchronized Reserve Zone Market. These values are for informational purposes only and are subject to change through the fifth business day of the following month. Hourly data for each reserve zone includes: RFC Synchronized Reserve Zone Synchronized Reserve Market Clearing Price (SRMCP) in $/MWh of synchronized reserve provided; RFC Synchronized Reserve Zone total MWh of Tier 1 synchronized reserve applied to obligations estimated prior to the operating hour; RFC Synchronized Reserve Zone total MWh of Tier 1 synchronized reserve provided in excess of obligations; RFC Synchronized Reserve Zone total unrecovered opportunity cost payments made to Tier 2 resources assigned as part of the clearing process; RFC Synchronized Reserve Zone total unrecovered opportunity cost payments made to Tier 2 resources assigned during the operating hour; RFC Synchronized Reserve Zone total MWh of synchronized reserve purchased in the market; and RFC Synchronized Reserve Zone total Tier 1 Synchronized Reserve credits. Daily Ancillary Services
Annual FTR Auction Bid Data These files contain the bids into the PJM Annual FTR Auction. Monthly 6 Month Lag Historical Bid Data
Daily Energy Market Bid Data These files contain the generator bids into the PJM Daily Energy Market. Successful bids are committed to meet PJM energy demand for the indicated day. The filename indicates the date for which the bids were effective. Monthly 4 Month Lag Historical Bid Data
Historical Load Forecasts These files contain load forecasts made by PJM. Each operating day has eight forecasts - four made the day prior, and four made during the operational day. n/a Historical Bid Data
Historical Generation and EHV Losses The files contain the hourly PJM Generation and EHV Loss data for each day. The data is in CSV (comma separated values) format. Daily with a two week lag Historical Bid Data
Hourly Day-Ahead Demand Bid Data These files contain the Aggregated PJM Hourly Day-Ahead Demand Bid data. Each file contains the aggregated PJM hourly Day-Ahead Bids for each day in the indicated month. Monthly 6 Month Lag Historical Bid Data
Hourly Day-Ahead Inc and Dec Bid Data These files contain the virtual bids into the PJM Daily Energy Market. The bids are aggregated by pricing point, by bid type, by hour, and by day. Monthly 4 Month Lag Historical Bid Data
Monthly Demand Side Response Bid Data These files contain the Demand Side Response Bids for a random day during the month . The bids are aggregated by site, and by bid type for Day Ahead and Real Time. The file also contains the amount of registered MW by zone. The identity of each DSR site is market sensitive information which cannot be revealed by PJM. Monthly 6 Month Lag Historical Bid Data
Monthly EFORd Data These files contain the monthly EFORd ratings by fuel type for all units on the PJM system. Annual Historical Bid Data
Monthly FTR Auction Bid Data These files contain the bids into the PJM Monthly FTR Market. Successful bids are awarded FTRs for the indicated one-month period. Monthly 6 Month Lag Historical Bid Data
PJM Daily Generation Capacity These files contain the PJM available generator capacity aggregated for the PJM system by hour and by day. n/a Historical Bid Data
Spinning Reserve Data These files contain statistical information on the PJM Spinning Market. The identity of each condensing unit and company is market sensitive information which cannot be revealed by PJM. n/a Historical Bid Data
FTR Model Information Page containing several files on the FTR model. n/a FTR
Revenue Adequacy Posting This file contains historical data on the FTR revenue adequacy. n/a FTR
Preliminary Operating Reserves Rates The daily billing rates for PJM operating reserves. These values are for informational purposes only and are subject to change through the fifth business day of the following month. The daily rate for Day-Ahead operating reserves is in dollars per megawatt hour of demand, decrement and export transactions cleared for that day in the PJM Day-Ahead Energy Market. The daily rate for balancing operating reserves is in dollars per megawatt hour of Real-Time Energy Market deviations from scheduled amounts cleared for that day in the PJM Day-Ahead Energy Market. Daily Operating Reserves
Reactive Supply and Voltage Control Revenue Requirements In accordance with the FERC acceptance of Docket No. ER08-339 on 2/13/2008, the files contain PJM generators’ annual reactive revenue requirements and are being posted on the PJM Web site rather than being included in the PJM Open Access Transmission Tariff Schedule 2. This is intended to reduce the costs and administrative burden of repeatedly filing PJM tariff revisions for additions, deletions and changes to reactive revenue requirements. Current and historical files are listed below with the file name reflecting the effective date. Notes are contained in each file to identify any retroactively effective revenue requirements. n/a Reactive Supply
Operational Data This is a live, point-in-time posting of LMPs for a set of hubs, zones, and aggregates as well as transfer and load information. 5 minutes Operational Data
Daily Day-Ahead Locational Marginal Pricing These files contain hourly Day-Ahead Energy Market locational marginal pricing (LMP) data in Eastern Prevailing Time (EPT) for all bus locations, including aggregates, in comma separated variable format. Daily Day-Ahead Energy Market
Day-Ahead Transmission Constraints Varies by Year Day-Ahead Energy Market
Hourly Day-Ahead Demand Bid Data These files contain the hourly day-ahead total demand in CSV format. Daily Day-Ahead Energy Market
LMP Model information General page with several postings on the LMP model, aggregate and hub definitions, etc. n/a Day-Ahead Energy Market
Marginal Value of Day-Ahead Transmission Constraints Varies by Year Day-Ahead Energy Market
Monthly Day-Ahead Locational Marginal Pricing These files contain hourly LMPs for all pricing points in PJM. Each file contains one month's worth of data. Separate files are posted for Real Time and Day Ahead. Monthly Day-Ahead Energy Market
Monthly FTR Zonal LMP These files contain the monthly FTR Zonal LMPs in CSV format. FTR Zonal LMPs are based on peak load apportionments and are subject to change prior to the fifth PJM business day of the following month. Monthly Day-Ahead Energy Market
Nodal Reference Prices for Virtual Bid Screening n/a Day-Ahead Energy Market
Zip code and closest Pnode This listing shows zip codes in the PJM footprint and the closest load PNODE to that zip code. This mapping is done strictly by geographical distance and has no correlation to actual power flows or the transmission or distribution systems. n/a Day-Ahead Energy Market
EIA 411 Reports PJM Form EIA-411 Reports contain information regarding electricity supply, both capacity and energy, that is needed to serve current demand and for future growth. Annual Regulatory Repots