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Out-of-Merit-Order Dispatch: A Market Clearing Engine Co-Optimisation Study

Out-of-Merit-Order Dispatch: A Market Clearing Engine Co-Optimisation Study
Lu Feiyu, Senior Market Analyst
Original Publication Date: January 2005

This paper traces the dispatch pattern of five co-optimised products in the NEMS. The study was triggered by a query from a market participant that observed that one of its generating units was not fully dispatched although the marginal price was much more than its offered price, whereas another unit was dispatched above the marginal price offer block. This paper reports the result of the investigation and makes some recommendations to market participants regarding such instances.