Impacts of Intra-Hour Energy Offer Curve Submissions on SCED Performance
Explore the potential impacts of intra-hour energy offer curve submissions on SCED performance in ERCOT. Understand how SCED data reads work today, with changes in real-time and average run times. Learn about cautionary notes regarding the implementation of intra-hour EOCs for storage resources.
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Presentation Transcript
Potential Impacts of Intra-Hour Energy Offer Curve Submissions on SCED Performance ERCOT Staff WMWG August 19, 2019
SCED data reads: How it works today Some data is static for the full Operating Day Example: Resource parameters Some data changes by the hour Energy Offer Curves Mitigated Offer Cap Curves & Offer Floor 2 PUBLIC
SCED data reads: How it works today Some data changes in real time, with every SCED run. For example: Resource status MW LDL/HDL Transmission constraints Normally: SCED run at top of HE 01 takes the longest SCED run at top of each hour is second-longest Intra-hour SCED runs are the fastest 3 PUBLIC
2019 SCED timestamps Jan. 1 thru July 10, 2019 SCED average run times : SCED Type No. of runs Mean (seconds) 1st of Day 191 18.3 1st of Hour 4,751 16.0 Others 54,534 12.2 This data indicates that intra-hour SCED runs that include reads of new EOCs should increase run time by less than 4 seconds, on average ERCOT cautions that this is only an estimate; results after actual implementation could vary 4 PUBLIC
Cautionary notes Intra-hour EOCs for storage resources should not be implemented without first developing mitigation rules for storage There will be system impacts, magnitude currently unknown: Settlements Market Management System MIS Reports Others . 5 PUBLIC
