Stability of Economically-Oriented NMPC with Periodic Constraint

Huang, Rui; Biegler, Lorenz T.

doi:10.3182/20110828-6-it-1002.00137

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…Efforts to reduce this computational burden, by reducing prediction horizon, have resulted in undesirable closed-loop characteristics, including inventory creep and bang–bang-type actuation . It is also noted that efforts to ensure closed-loop stability of the EMPC algorithm have required the use of specialized analysis techniques and nonintuitive additions to the basic algorithm. − …”

Section: Introductionmentioning

confidence: 99%

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

Omell

Chmielewski

2013

Ind. Eng. Chem. Res.

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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–bang 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.

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Section: Introductionmentioning

confidence: 99%

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

Omell

Chmielewski

2013

Ind. Eng. Chem. Res.

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“…Efforts to reduce this computational burden, by reducing prediction horizon, have resulted in undesirable closed-loop characteristics, including inventory creep, [23] and bangbang type actuation [20]. It is also noted that efforts to ensure closed-loop stability of the EMPC algorithm have required the use of specialized analysis techniques and nonintuitive additions to the basic algorithm [25][26][27]. To motivate the discussion, consider the process diagram of Figure 2, which resembles a simplified version of a refinery (for the moment, ignore the storage units S 1 through S 5 ).…”

Section: Introductionmentioning

confidence: 99%

Demand response for chemical manufacturing using Economic MPC

Mendoza-Serrano

Chmielewski

2013

2013 American Control Conference

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The notion of demand response in electric power systems is to use time varying electricity price structures to encourage consumers to track generation availability. Specifically, when available generation is low, either due to high demand or a lack of renewable sources, an increase in electricity rates is intended to encourage smart grid participants to reduce consumption. Similarly, when on-line generation is higher than demand, smart grid participants may benefit from low electricity rates. While many think of smart grid participants as residential consumers, the commercial building and industrial sectors will likely result in a higher grid impact to implementation cost ratio. In this work we investigate potential demand response mechanisms from the chemical manufacturing industry. It will be shown that depending on the type of upgrade hardware selected the smart grid operating policy will either be an application of Real-Time Optimization (RTO) or Economic Model Predictive Control (EMPC). In the case of EMPC the impact of prediction horizon size will be highlighted.

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Application of infinite-horizon EMPC to IGCC dispatch

Omell

Chmielewski

2013

2013 American Control Conference

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Stability of Economically-Oriented NMPC with Periodic Constraint

Cited by 5 publications

References 15 publications

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

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

Demand response for chemical manufacturing using Economic MPC

Application of infinite-horizon EMPC to IGCC dispatch

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