Changes to Counter-Intuitive Prices (Inputs to Dispatch Scheduling and Pricing Process)
(MR-296)
In addition to the foregoing amendments, the IESO Board unanimously approved further amendments to remedy counter-intuitive pricing. The purpose of these amendments is to allow the IESO to make changes to real-time pricing signals in order to hopefully reduce the instances of counter-intuitive pricing. The proposed amendments are two-fold. First, emergency energy purchases may produce counter-intuitive pricing because they reduce demand in constrained sequences by an amount equivalent to the emergency energy purchase; the dispatch scheduling algorithm automatically carries that demand reduction to the market schedule which thereby depresses the market price. As such, section 3.2.1.4 in Appendix 7.5 will be amended so that demand in the market schedule is not reduced when the IESO makes emergency energy purchases (although demand will still be reduced in the constrained schedule so that other resources are dispatched appropriately). Second, other emergency control actions such as voltage reductions or load cuts may produce counter-intuitive pricing because they result in an actual decrease in electricity demand. Accordingly, a new section 3.2.1.12 will be added to Appendix 7.5 to enable the IESO to increase or decrease demand in the market schedule to offset the counter-intuitive impact on market pricing and market signals triggered by emergency control actions.
LINKS:
IESO Board Decision
Technical Panel Recommendation on Amendment Proposal
Amendment Proposal R00-R01 - Request for Stakeholder Review and Comment
Amendment Submission
