Oil product blending online optimization control method adopting multi-layer architecture

Abstract

The invention relates to an oil product blending online optimization control method adopting a multi-layer architecture. A whole control system comprises a three-layer structure including an underlying proportional control layer, a multivariable coordinated control layer and an optimization layer, wherein the underlying proportional control layer directly executes a recipe instruction and issues the recipe instruction to a field control system; the multivariable coordinated control layer has a local dynamic optimization and coordination function, acquires locally optimal recipes according to ablending attribute target and other process information, and regards the locally optimal recipes as set values of a proportional controller; and the optimization layer calculates transient attributeset values (upper and lower limits) adapted to the optimal recipe under the condition of satisfying process constraints according to targets such as the blending cost or profit and just qualified attributes, and issues an instruction to the multivariable coordinated controller for execution. The optimization control method adopting the three-layer architecture enhances the anti-interference ability, and the layers can be operated independently or perform step-by-step control, thereby effectively solving the problems of no feasible solution in the process of blending optimization and unstable control caused by large fluctuations of component oil attributes.

Description

technical field

[0001] The invention relates to the field of oil product blending in oil refining enterprises, in particular to an online optimization control method for oil product blending, in particular to an online optimization control method for oil product blending with a multi-layer structure. Background technique

[0002] Oil blending is to uniformly mix two or more component oils in an appropriate proportion, so that the quality index of the mixed oil meets the relevant national standards or production requirements. Under the premise of meeting the quality indicators or production requirements, it is necessary to make full and reasonable use of each component oil as much as possible to blend out a mixed oil product (refined oil) with qualified quality, minimum excess quality, and lowest cost, which is a further improvement for oil refining enterprises. Effective means of economic benefit. With the improvement of quality indicators and the increase of oil types, the...

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