Moving Forward Overview of the 2003 Blackout

Overview Power system restored within 30 hours Conservation efforts avoided rolling blackouts once power system restored Focus now on cause and how to prevent a recurrence Electricity is back on the public agenda -- with a serious debate about future management of the system

Business As Usual Before Power Outage 584 MW 1,090 MW 490 MW 140 MW Conditions at 4:06 EDT: Demand: 24,050 MW Imports: 2,300 MW Reserve requirements met Operating within system limits Voltages within required ranges

First Power Swing The flow from Michigan reverses, changing magnitude by about 700 MW Voltages across South-Western Ontario are in a declining trend 700 MW Surge

270 MW 1,790 MW First Power Swing Flow conditions after first power swing System remains in a stable condition

Power swings of 2,000-4,000 MW continue for 12 seconds Second Power Swing

300 MW Load 1200 MW Generation Smoky 30 MW 40 MW Load 720 Generation Des Joachims 20 MW 800 MW Load 480 MW Generation 320 MW 680 MW To New York 900 MW

Restoration Plan Priorities Restore power to all nuclear sites Restore power to critical transmission and generating station, station service loads Restore critical utility owned telecom facilities Restore customer loads only to the extent necessary to control voltages and secure generating units Synchronize islands together and/or to adjacent power systems

3 Restoration Paths

Decision Support System status briefings (two cycles daily) Briefings and advice provided to key decision makers and Premier Twice daily news conferences Industry load reduction support Government delegated ‘Electricity’ communications responsibilities to the IMO - co-ordinated IMO/OPG/H1 info

Communications Activity Twice-daily media briefings IMO principal voice between briefings Average of 25 ‘live’ radio interviews and 5-10 television interviews daily 200+ media calls per day Twice daily news releases Numerous communications to market participants Communications provided 24 hr coverage 200,000 daily hits on the web site Help Centre staffed 24 hours a day

Conservation Efforts

Moving Forward Blackout not caused in Ontario Investigations underway Mandatory enforceable reliability standards should be put in place where they do not exist Maintain and enhance the integration of systems and markets The industry should continue to pursue the three part strategy of prevention, containment and minimization of the effects of system disturbances

Moving Forward Overview of the 2003 Blackout