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A mixed-integer conic programming formulation for computing the flexibility index under multivariate gaussian uncertainty
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DOI：10.1016/j.compchemeng.2018.09.005.png)
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Abstract
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We present a methodology for computing the flexibility index when uncertainty is characterized using multivariate Gaussian random variables. Our approach computes the flexibility index by solving a mixed-integer conic program (MICP). This methodology directly characterizes ellipsoidal sets to capture correlations in contrast to previous methodologies that employ approximations. We also show that, under a Gaussian representation, the flexibility index can be used to obtain a lower bound for the so-called stochastic flexibility index (i.e., the probability of having feasible operation). Our results also show that the methodology can be generalized to capture different types of uncertainty sets. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords:
Flexibility
Uncertainty
Ellipsoidal
Mixed-Integer
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