Using Interim Recommitment to Reduce the Operational-cost Impacts of Wind Uncertainty

Using wind-availability forecasts in day-ahead unit commitment can require expensive real-time operational adjustments. We examine the benefit of conducting interim recommitment between day-ahead unit commitment and real-time dispatch. Using a simple stylized example and a case study that is based o...

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Bibliographic Details
Published inJournal of modern power systems and clean energy Vol. 10; no. 4; pp. 839 - 849
Main Authors Mahan A. Mansouri, Ramteen Sioshansi
Format Journal Article
LanguageEnglish
Published IEEE 01.07.2022
Subjects
economic dispatch
power-system economics
Power-system operation
unit commitment
wind generation
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Summary:Using wind-availability forecasts in day-ahead unit commitment can require expensive real-time operational adjustments. We examine the benefit of conducting interim recommitment between day-ahead unit commitment and real-time dispatch. Using a simple stylized example and a case study that is based on ISO New England, we compare system-operation costs with and without interim recommitment. We find an important tradeoff-later recommitment provides better wind-availability forecasts, but the system has less flexibility due to operating constraints. Of the time windows that we examine., hour-20 recommitment provides the greatest operational-cost reduction.
ISSN:2196-5420
DOI:10.35833/MPCE.2021.000573