Real-Time Maps and Charts

System Load Graph

Date: 07/01/2022  
 
 
 

This graph shows electricity demand from these perspectives:

 

   Forecast: The most recently-published forecast  of electricity demand, updated as needed and at least twice daily.

   Actual: The real-time electricity usage on New England’s bulk power grid, updated every 5 minutes.

   Cleared: The demand for electricity that cleared in the Day-Ahead Energy Market for the selected day.

   Prior-Day: A record of the demand forecast published prior to the deadline for bids and offers in the Day-Ahead Energy Market for the selected day.

   Actual Including Pump Load: Real-time electricity usage on the bulk power grid, including demand from pump load resources.
   Actual  Including Estimated Behind-the-Meter Solar: An estimate of real-time electricity usage in New England, including actual usage on the bulk power grid and estimated output from from behind-the-meter solar resources.

 

ISO New England predicts electricity usage based on daily and seasonal patterns, as well as weather and distributed generation resources, not connected to the regional power grid.

 

TIPS:

 - Hover over the lines in the graph to see the megawatt amounts for each line item during any point throughout the day.

 - Use the date picker to see historical data.

 - The Prior Day forecast line provides an increased level of transparency into our forecast accuracy, which we consistently strive to improve.

 - Click on the export button to view the raw chart data in CSV format.

 
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Five-Minute Real-Time LMP Graph

Date: 07/01/2022  
 
 
 
 
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Fuel Mix Graph

Date: 07/01/2022  
 
 
 

This graph charts the fuels New England's power plants are using to generate electricity throughout the course of a day, by megawatt. Electricity imported from neighboring areas is not included.

 

Fuels in the graph include: natural gas, nuclear, coal, oil, hydro, other, and renewable. Fuels in the renewable category include: landfill gas, methane, refuse, solar, steam, wind, and wood.

 

Hydro is not included in the renewable category primarily because the various sources that make up hydroelectric generation (i.e., conventional hydroelectric, run-of-river, pumped storage) are not universally defined as renewable in the six New England states.

 

The other category contains the output of energy storage devices and demand response.

 

Click the gear icon in the upper right corner of portlet to view renewables only; click on the export button to view the raw chart data in CSV format.

 
 
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Estimated CO₂ Emissions

Date: 07/01/2022  
 
 
 

This graph displays estimated average carbon dioxide (CO2) emissions, in metric tons, from New England power plants in real time throughout the course of the day. The estimates are for resources using oil, refuse, wood, coal, landfill gas, or natural gas to generate electricity. The graph also shows the sum of estimated average CO2 emissions from these resources as a total estimate for the region’s bulk power system.

 

The estimates are based on a formula that multiplies power generation from each fuel type, in megawatts (MW), by an emissions factor developed by ISO New England. The factors, derived from Environmental Protection Agency data, are:

 

  • Oil: .03942 metric tons of CO2 per MW
  • Refuse: .02682 metric tons of CO2 per MW
  • Wood: .01841 metric tons of CO2 per MW
  • Coal: .01722 metric tons of CO2 per MW
  • Landfill Gas: .01399 metric tons of CO2 per MW
  • Natural Gas: .00664 metric tons of CO2 per MW

 

Other resource types—nuclear, hydro, wind, solar, and energy storage devices—do not produce CO2 emissions. The graph does not include emissions estimates for electricity imported from neighboring areas because the resource types producing this electricity are unspecified.

 

Click the chart icon or menu icon to toggle between the graph view and a data table. Click the export button to download the data in CSV format.

 
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Five-Minute Real-Time LMP List

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Zone/Interface Energy Cong Loss LMP
New England Load (MW)

Three-Day System Demand Forecast

Date: 07/01/2022  
 

This forecast is ISO New England's hourly systemwide demand forecast for today and the next two days. This is the expected amount of electricity to be used in the New England Balancing Authority Area: Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, and most of Maine. The forecasted demand incorporates the demand-reducing effects of regional energy-efficiency measures acquired through the Forward Capacity Market, distributed generation, and a reduction in peak load that can be expected from the region's behind-the-meter photovoltaic installations at homes and businesses. The forecast is updated twice daily at 6:00 a.m. and 10:00 a.m. eastern prevailing time.

 
Hour
End
MWh MWh MWh

Hourly LMP Graph

Date: 07/01/2022  
 
 
 
 
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Reserve Prices Graph

Date: 07/01/2022  
 
 
 
 
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Fuel Mix Chart

Fuels Renewables
 

These charts indicate the fuels being used by New England's power plants to generate electricity. Electricity imported from neighboring areas is not included.

 

Fuels in the chart include: natural gas, nuclear, coal, oil, hydro, other, and renewable. Fuels in the renewable category include: landfill gas, methane, refuse, solar, steam, wind, and wood.

 

Hydro is not included in this category primarily because the various sources that make up hydroelectric generation (i.e., conventional hydroelectric, run-of-river, pumped storage) are not universally defined as renewable in the six New England states.

 

The other category contains the output of energy storage devices and demand response. 

 

A fuel may appear in the legend but not in the charts if it is producing a very low amount of electricity. If a fuel is not producing any electricity, it will not appear at all.

 

The Marginal Fuel is the fuel currently being used by the resource that will be dispatched to generate the next additional megawatt of energy on the New England power system.

 

Click on the export button in the upper right corner of the portlet to view the raw chart data in CSV format.

 

External Interfaces Graph

Date: 07/01/2022  
 
 
 
 
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Morning Report

Date: 07/01/2022  
 
Produced daily, the Morning Report provides the ISO's best estimate of expected capacity available to meet peak-hour electricity demand and reserve requirements — key parameters used to operate the power system reliably.
 
Report Date
Peak Load(MW)
Operable Capacity Analysis(MW)
A. Capacity Supply Obligation (CSO)
B. Capacity Additions EcoMax Bid > CSO
C. Generation Outages and Reductions
D. Uncommitted Available Generation (non fast start)
E. Capacity Deliveries: Net Purchases = (-) Net Sales = (+)
Net Deliveries
F. Total Available Capacity (A+B-C-D-E)
H. Total Operating Reserve Requirement
I. Capacity Required
J. Surplus = (+) Deficiency = (-) (F - I)
K. Replacement Reserve Requirement
L. Excess Commitment Surplus = (+) Deficiency = (-) (J - K)
Largest First Contingency (MW)
Annual Maintenance Schedule (A.M.S)(MW)
Peak Load Exposure
Reserve Summary(MW)
Ten Minute Reserve Requirement
Ten Minute Reserve Estimate
Thirty Minute Reserve Requirement
Thirty Minute Reserve Estimate
Expected Actions of OP 4
Additional Capacity Available from OP 4 Actions
Interchange Summary(MW)(MW)(MW)
TRANSFER
LIMIT IN
TRANSFER
LIMIT OUT
SCHEDULED
CONTRACT
Weather Forecast Summary for the Peak Hour
CITY CONDITIONS WIND HIGH TEMP(F)
NYISO SAR Available
Total Capacity of Non-Commercial Units (MW)
Units Committed to Meet Minimum Operating Reserve and Replacement Reserve Requirements(MW)
Geomagnetic Disturbance Activity
Forecast
Alert
Intensity
Observed Activity
Actions Taken or Planned by ISO-NE None
Actions Taken or Planned by Other Control Areas None

Seven-Day Capacity Forecast

Date: 07/01/2022  
 

Every day, ISO New England publishes this summary of factors affecting the power system for the next seven days, including weather, generating capacity, and peak demand. The forecast is used to identify capacity deficiencies several days in advance and triggers the commitment of generators with start times greater than 24 hours.

 
Report Date
Day 2Day 3Day 4Day 5Day 6Day 7
Weather
Generating Capacity position
Total Capacity Supply Obligation (CSO)
Anticipated Cold Weather Outages
Other Generation Outages
Anticipated De-List MW Offered
Total Generation Available
Import at Time of Peak
Total Available Generation and Imports
Projected Peak Load
Replacement Reserve Requirement
Required Reserve
Required Reserve including Replacement
Total Load plus Required Reserve
Projected Surplus/(Deficiency)
Available Demand Response Resources
Available Real-Time Emergency Generation
Load Relief Actions Anticipated
Power Watch
Power Warning
Cold Weather Watch
Cold Weather Warning
Cold Weather Event

LMP Map

NE Energy:  $0.00
System Demand:  0 MW
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Binding Constraints +
No binding constraints for this sampling period.
LMP Map
New England Energy:  $0.00
System Demand:  0 MW
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$1,001+
$501-1,000
$201-500
$151-200
$101-150
$71-100
$41-70
$21-40
$0-20
Under $0
Binding Constraints
 

System Load

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Power System Conditions