Home > Power Data

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

12,242 MW
at 4:00 a.m. EST
April 21, 2014

up

5-minute Ontario Demand

13,105 MW
at 5:00 a.m. EST

up

Projected Ontario Demand (next hour)

12,362 MW
at 5:00 a.m. EST

up

Today's Projected Peak (Ontario)

16,993 MW
at 8:00 p.m. EST

Today's Projected Minimum (Ontario)

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

Market Demand

14,229 MW
at 4:00 a.m. EST

up

5-minute Market Demand

15,212 MW
at 5:00 a.m. EST

down

Today's Projected Peak (Market)

18,025 MW
at 8:00 p.m. EST

Today's Projected Minimum (Market)

13,568 MW
at 12:00 a.m. EST

Operating Reserve Requirement

1,418 MW
at 5:00 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

23,325 MW

down

Generator Availability

23,596 MW
at 4:00 a.m. EST

up

Nuclear Output

9,220 MW
at 4:00 a.m. EST

up

Hydro Output

3,505 MW
at 4:00 a.m. EST

up

Gas Output

691 MW
at 4:00 a.m. EST

up

Wind Output

582 MW
at 4:00 a.m. EST

up

Coal Output

MW
at 4:00 a.m. EST

nochange

Other Output

130 MW
at 4:00 a.m. EST

nochange

Hourly Imports

MW
at 4:00 a.m. EST

nochange

Hourly Exports

2,041 MW
at 4:00 a.m. EST

up

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

$3.60/MWh
at 4:00 a.m. EST
April 21, 2014

down

Market Clearing Price
(5-minute price)

$14.34/MWh
at 4:55 a.m. EST

down

Global Adjustment
(First Estimate)

$-9.65/MWh
April

Global Adjustment
(Actual)

$-.27/MWh
March

Average Weighted Price

$35.58/MWh
(3.56 cents/kWh)
for April

down

Hourly Uplift Charge Estimate

$.00/MWh
at 1:00 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 
114,108 716,620 1317,331 1917,216
214,048 817,230 1417,343 2018,025
313,962 917,601 1517,339 2117,733
414,229 1017,366 1617,566 2216,668
514,734 1117,523 1717,611 2315,478
615,643 1217,496 1817,415 2413,568
Download: XML
Actual   Projected
Ontario Demand (MW)
Hour EndingDemand 
112,070 714,612 1316,147 1916,361
211,961 815,403 1416,053 2016,993
312,019 915,851 1516,042 2116,637
412,242 1016,019 1616,279 2215,473
512,362 1116,199 1716,522 2314,223
613,532 1216,215 1816,325 2413,360
Download: XML

The Market Day

April 21, 2014

Dispatch   Pre-Dispatch
HOEP Price ($/MWh)
Hour EndingPrice 
114.32 730.00 1338.20 1919.13
214.31 826.81 1439.34 2030.71
39.26 935.00 1539.34 2121.13
43.60 1036.72 1639.38 2214.13
57.96 1138.20 1739.34 237.24
622.00 1239.34 1825.00 24-4.60
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.