Feedback control and optimization for the production of commercial fuels by blending

M. Chèbre (1) , Yann Creff (2) , Nicolas Petit (3)

1 Advanced Process Control Department
2 IFPEN - IFP Energies nouvelles
3 CAS - Centre Automatique et Systèmes

This paper presents a control algorithm for blending systems. Such systems are used in refining to produce mixtures having specified properties from several components. The underlying control problem is multi-variable, with constraints on the inputs and outputs, and involves large uncertainties. To address this complexity, a constrained optimization problem is formulated, while the uncertainties are treated in closed-loop by an estimator of the components properties. Besides a theoretical study of the main algorithm and a study of convergence, the paper presents numerous technical details that are needed to solve blending problems as they appear in refining operations. Among them are a general lack of measurements, variable delays, measurement synchronization, infeasibilities management, hydraulic constraints, and pre-blends. Industrial case-studies are provided and stress the relevance of the approach.

Mots clés: Blending; Commercial fuel; Feedback control; Optimization; Constraints; Partial measurement

Domaines: Automatique / Robotique

M. Chèbre, Yann Creff, Nicolas Petit. Feedback control and optimization for the production of commercial fuels by blending. Journal of Process Control, 2010, 20 (4), pp.441-451. ⟨10.1016/j.jprocont.2010.01.008⟩. ⟨hal-00465535⟩