Hour Ahead Dispatchable Load (HADL)

To address the fact that economic and operating characteristics of most loads prevent many from participating in the market on a five-minute dispatchable basis, the IESO implemented the hour-ahead dispatchable load (HADL) program. Through the program, loads submit an offer to the IESO indicating the amount of energy to be reduced in real-time if the pre-dispatch energy price exceeds a certain level. The offer is submitted at least three hours prior to the dispatch hour. The IESO sends dispatch instructions to the load to reduce its consumption when the three hour- ahead price is higher than the submitted bid price. If the real-time price turns out to be lower than the offer price, the load will be compensated for the difference between bid price and the market clearing price. This program is no longer active. Please see September 5, 2008 entry on the table below for further details.

HADL Initiatives and Consultations

Date	Materials/Presentations/Submissions
September 5, 2008	MR-00346: Eliminate the Hour-Ahead Dispatchable Load Program: This amendment eliminates the Hour-Ahead Dispatchable Load (HADL) program for the following reasons: a) The program is no longer in use by market participants; b) With the advent of the Ontario Power Authority (OPA) Demand Response 1 (DR1) program, the HADL program has become redundant; and c) Elimination of HADL will reduce IESO costs required to maintain the settlement systems and processes to support the program.
May 29, 2003	• HADL Quick Take
April 23, 2003	• HADL MOSC Presentation - Applicable Updates to procedures
December 18, 2002	• Hour Ahead Dispatchable Load (HADL): Market Operations Standing Committee (MOSC) Paper and Examples

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