IGCC Power Plant Dispatch Using Infinite-Horizon Economic Model Predictive Control

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• 作者：Benjamin P. Omell ; Donald J. Chmielewski
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：March 6, 2013
• 年：2013
• 卷：52
• 期：9
• 页码：3151-3164
• 全文大小：797K
• 年卷期：v.52,no.9(March 6, 2013)
• ISSN：1520-5045

文摘

The Integrated Gasification Combined Cycle (IGCC) possesses many benefits over traditional power generation plants, ranging from increased efficiency to flex-fuel and carbon capture opportunities. A lesser-known benefit of the IGCC configuration is the ability to load track electricity market demands. The idea being that process modifications to enable dispatch capabilities will allow for a time-shift of power production away from periods of low energy value to periods of high value. The work begins with an illustration of Economic Model Predictive Control (EMPC) as a vehicle to exploit dispatch capabilities by pursuing the objective of maximizing revenue directly. However, implementation of EMPC can result in unexpected and, at times, pathological closed-loop behavior, including inventory creep and bang鈥揵ang actuation. To address these issues, an infinite-horizon version of EMPC is developed and shown to avoid many of the performance issues observed in the finite-horizon version. The paper concludes with an in-depth discussion of energy value forecasting and how the quality of forecasts can be incorporated into the design of the infinite-horizon EMPC controller.