Control Action in Operating Reserve

On July 3, 2003, the IESO Board approved market rule amendment (MR-00235-R00-R05) introducing Control Action Operating Reserve (CAOR) in the market. This initiative authorized the IESO to include standing offers in the market for the following control action sources:

load that would be reduced if the IESO implemented a 3% voltage reduction;
load that would be reduced if the IESO implemented a 5% voltage reduction; and
not meeting the thirty-minute reserve requirements in accordance with reliability standards.

Initial implementation of these standing offers was limited to the inclusion of 3% voltage reduction as an operating reserve source. This source of operating reserve was chosen based on its offer prices compared to the offer prices of other market sources. The times and quantities of these sources of operating reserve selected and scheduled are available on the IESO Reports site in the Realtime Operating Reserve in Market report.

Due to the number of occurrences of shortfalls in OR offers, on October 15, 2003, the IESO introduced an additional 200MW of CAOR in the market which resulted in a total of 400 MW. Also for this reason, on November 23, 2005, the IESO introduced an additional 400MW of CAOR, bringing the total to 800 MW as shown in the table below.

Control Action Operating Reserve in Market - Resource Offers
Resource	Total Quantity (MW)	30 min OR Price ($/MW/Hr)	10 min NonSync OR Price ($/MW/Hr)	Resource OR Scheduling Ramp Rate (MW/Min)	Energy Bid ($/MWh)	Resource Energy Ramp Rate (MW/Min)
RICHVIEW-230.G_3VR	400	30.00	30.10	999	2000.00	4 up, 999 down
RICHVIEW-230.G_5VR	200		75.00	999	2000.00	4 up, 999 down
RICHVIEW-230.G_5VR	200		100.00	999	2000.00	4 up, 999 down

On September 5, 2008, the IESO Board approved the removal of CAOR from Pre-dispatch. The decision was made in order to manage operational impacts and concerns associated with export failures.