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A rolling-horizon unit commitment framework with flexible periodicity
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DOI：10.1016/j.ijepes.2017.01.026.png)
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In this work, we develop a mathematical model and framework to represent rolling-horizon unit commitment (UC) processes with multiple periodicities. In control center operations, UC is solved repeatedly to adjust device commands based on new information about load, generation availability, renewable energy production, and other aspects of system state as uncertain conditions are realized. We develop a three level model including 24-h UC, rolling-horizon UC (RHUC), and economic dispatch (ED) and give formulations for the three problems including interdependencies. This framework allows for evaluation of, among other things, different periodicities of the rolling horizon problem and the benefits of more accurate forecasting information. Experimental results are shown for a 6-bus system and a 3012-bus system with wind generation in two wind scenarios. Although the generation costs are very similar, the deviation between RHUC schedules and actual deployment is noted to be superior for a 20-min, periodicity compared to a 30-min periodicity. Additionally, less reserve is deployed in the 20-min RHUC case. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword:
Unit commitment
Optimization
Power system operations
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5
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1.1W
被引数:
3.1W
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