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Power Data

Select Recent and Historical Reports: Click the links below to go to the latest version of select reports within the IESO Public Reports Site (.xml) and historical reports (.csv). IESO Public Reports contain a day or hour`s worth of data and historical reports provide data from 2002 to the present. For more information, the Data Directory provides a listing and explanation of all reports below as well as all other IESO reports.

Demand


Supply


Price


 

Recent Reports



Historical Reports

Demand Demand Inforamtion

Demand

Ontario Demand – Hourly and 5-Minute: Represents the energy supplied by the IESO-Administered Market to meet demand within Ontario. The IESO calculates Ontario Demand by subtracting scheduled exports from Total Market Demand. It is also equal to the sum of all loads (consumption) within Ontario supplied from the market, plus all line losses incurred on the IESO-controlled grid.

Market Demand – Hourly and 5 Minute: Represents the total energy supplied by the IESO-Administered Market. The IESO calculates Market Demand by summing all output from generators registered in the market plus all scheduled imports to the province. It is also equal to the sum of all load supplied from the Market plus exports from the province, plus all line losses incurred on the IESO-controlled grid.

Today’s Projected Peak (at time): Represents the projected maximum amount of electricity required to meet peak Ontario and Market Demand for the day. Project demand can change throughout the day as the weather, system status and other factors that affect demand and supply also change. Where two intervals have the same projected peak, the earlier hour will be reported.

Today’s Projected Minimum (at time): Represents the lowest projected amount of electricity required to meet Ontario and Market Demand for the day.

Operating Reserve Requirement: Generation or load reduction capacity that the IESO can call upon on short notice to restore a balance between supply and demand, in the event of an unexpected demand increase or generator outage. The IESO purchases defined amounts of Operating Reserve from participants via three real-time markets.


Ontario Demand

15,454 MW
at 10:00 a.m. EST
April 21, 2014

up

5-minute Ontario Demand

15,421 MW
at 10:20 a.m. EST

down

Projected Ontario Demand (next hour)

15,849 MW
at 11:00 a.m. EST

down

Today's Projected Peak (Ontario)

16,503 MW
at 8:00 p.m. EST

Today's Projected Minimum (Ontario)

11,786 MW
at 3:00 a.m. EST

Market Demand

16,870 MW
at 10:00 a.m. EST

down

5-minute Market Demand

17,172 MW
at 10:20 a.m. EST

down

Today's Projected Peak (Market)

18,145 MW
at 8:00 p.m. EST

Today's Projected Minimum (Market)

13,382 MW
at 12:00 a.m. EST

Operating Reserve Requirement

1,418 MW
at 11:00 a.m. EST

nochange

Supply Supply Inforamtion

Supply

Generator Availability at Peak: Total amount of Ontario electricity generation available to produce energy at the predicted demand peak hour.

Generator Availability (at time): Total amount of Ontario electricity generation available to produce energy as per the previous hour’s output reports.

Output (by Fuel Type): Energy production by generators, 20 MW or greater, by fuel type (nuclear, hydro, gas, wind, coal and other – mostly woodwaste), published 30 minutes following the dispatching hour.

Hourly Imports: Total amount of scheduled electricity imported into Ontario, from neighbouring jurisdictions – Michigan, Manitoba, Minnesota, Quebec and New York.

Hourly Exports: Total amount of scheduled electricity exported from Ontario to neighbouring jurisdictions - Michigan, Manitoba, Minnesota, Quebec and New York.


Generator Availability at Peak

23,346 MW

down

Generator Availability

23,761 MW
at 9:00 a.m. EST

down

Nuclear Output

9,523 MW
at 9:00 a.m. EST

down

Hydro Output

4,645 MW
at 9:00 a.m. EST

up

Gas Output

1,627 MW
at 9:00 a.m. EST

down

Wind Output

422 MW
at 9:00 a.m. EST

down

Coal Output

MW
at 9:00 a.m. EST

nochange

Other Output

148 MW
at 9:00 a.m. EST

down

Hourly Imports

448 MW
at 10:00 a.m. EST

down

Hourly Exports

1,435 MW
at 10:00 a.m. EST

down

Price Price Inforamtion

Price

Current Hourly Ontario Energy Price (HOEP): Charged to Local Distribution Companies and large customers who use more than 250,000 kWh a year. HOEP is also paid to self-scheduling generators. HOEP is the hourly arithmetic average of the uniform Ontario energy price determined for each of the 12, 5-minute dispatch intervals in a particular hour.

Market Clearing Price (5-Minute Price): Calculated every five minutes, 12 times an hour. This is the price paid to generators and charged to dispatchable load.

Global Adjustment: Accounts for the difference between the market price and the rates paid to regulated and contracted generators and for conservation and demand management programs.

The First Estimate: Published at the beginning of the month and incorporates a forecast of Ontario demand to project the revenue needed to cover the global adjustment costs for that month. It also takes into account variances from previous months. Actual Global Adjustment costs for the previous month are also posted.

Average Weighted Price (Month): The Hourly Ontario Energy Price weighted by the amount of electricity used throughout the province within each hour, with adjustments.

Hourly Uplift Settlement Charge: The Estimated Hourly Uplift Settlement Charges presents hourly estimates of this charge which covers the costs of Operating Reserve, Congestion Management Settlement Credits, Intertie Offer Guarantee payments (IOG), and other hourly costs such as energy losses on the IESO-controlled grid.


Current Hourly Ontario Energy Price

$28.87/MWh
at 10:00 a.m. EST
April 21, 2014

up

Market Clearing Price
(5-minute price)

$39.34/MWh
at 10:15 a.m. EST

nochange

Global Adjustment
(First Estimate)

$-9.65/MWh
April

Global Adjustment
(Actual)

$-.27/MWh
March

Average Weighted Price

$35.38/MWh
(3.54 cents/kWh)
for April

down

Hourly Uplift Charge Estimate

$1.00/MWh
at 10:00 a.m. EST

nochange

Demand Overview

Read more about Ontario’s demand trends, records and seasonal peaks.

Learn more »

Supply Overview

Learn about Ontario’s current supply mix, a history of generation capability, and yearly imports and export values.

Learn more »

Price Overview

Historical prices including monthly average prices, Global Adjustment charge, and other electricity-related prices.

Learn more »

Monthly HOEP Peaks

On Peak
8 a.m. to 8 (M-F)
192.12 $/MWh
April 2014
Off Peak
8 p.m. to 8 a.m.
(M-F, weekends, holidays)
231.56 $/MWh
April 2014

Recent Summaries

Actual   Projected
Market Demand (MW)
Hour EndingDemand 
114,108 716,357 1317,755 1917,526
214,048 816,728 1417,350 2018,145
313,962 916,870 1517,223 2117,702
414,229 1016,870 1617,683 2216,636
514,906 1117,801 1717,600 2315,322
615,511 1217,438 1817,602 2413,382
Download: XML
Actual   Projected
Ontario Demand (MW)
Hour EndingDemand 
112,070 714,500 1315,357 1915,798
211,961 815,120 1415,257 2016,503
312,019 915,447 1515,188 2116,239
412,242 1015,454 1615,727 2215,141
512,689 1115,849 1715,850 2313,972
613,523 1215,419 1815,699 2413,176
Download: XML

The Market Day

April 21, 2014

Dispatch   Pre-Dispatch
HOEP Price ($/MWh)
Hour EndingPrice 
114.32 719.50 1338.78 1921.72
214.31 815.24 1435.52 2035.29
39.26 915.01 1536.06 2122.00
43.60 1028.87 1638.20 2214.12
514.35 1141.22 1738.19 231.00
621.21 1239.34 1836.06 24-4.70
Download: XML

Peak Tracker

Top 5 Allocated Quantity of Energy Withdrawn (AQEW) Peaks from
May 1, 2013 to April 30, 2014
RankDateHour EndingAQEW (MW)
1Jul 17, 20131724,141
2Jul 16, 20131723,551
3Jul 18, 20131723,504
4Jul 19, 20131423,234
5Jul 15, 20131723,107
Download: XML

The IESO uses the "Hour Ending" naming convention for the hours in a day. For example, Hour 1 is from 12 a.m. to 1 a.m., Hour 2 is from 1 a.m. to 2 a.m. Hours 1-24 are the hours from midnight one day through midnight the next day. Eastern Standard Time is used year round.