Graph-model-based uncertain steelmaking-continuous casting flexibility optimization scheduling method and system

Abstract

The invention discloses a graph-model-based uncertain steelmaking-continuous casting flexibility optimization scheduling method and system. The method comprises: a flexibility scheduling model is constructed, a flexibility decision-making mode of a scheduling solution is described by using a graph model according to features of a steelmaking-continuous casting production process, and time buffer is set to protect the performance index and feasibility of the scheduling solution under an uncertain condition; optimized solution solving based on a distribution estimation algorithm is carried out,and an association relationship between decision-making variables is described by using a procedure-association-based probability model to generate a high-quality new population, and an expectation performance of the flexibility scheduling solution is evaluated by using a stochastic simulation method. During the simulation process, the limited computing resources are allocated dynamically based onthe optimal computational allocation technique, so that the evaluation efficiency of the population is improved. Therefore, optimization of the waiting time of the steelmaking-continuous casting scheduling process and the expected value of the discontinuous casting ratio in the uncertain environment is realized.

Description

technical field [0001] The invention belongs to the fields of automatic control, information technology and advanced control, and relates to a steelmaking-continuous casting scheduling process, in particular to an uncertain steelmaking-continuous casting flexible optimal scheduling method and system based on a graphical model. Background technique [0002] Steelmaking-Continuous Casting (SCC) process is a key link in the whole process of steel manufacturing: high-temperature molten iron is converted into solid billet through three processes of steelmaking, refining and continuous casting, and then sent to the downstream hot rolling Process rolling into lumber, such as figure 1 shown. In this process, the molten steel produced by the steelmaking furnace at one time is called the heat (minimum processing unit); the set of heats processed continuously in the same continuous casting tundish life cycle is called the casting. The main task of steelmaking-continuous casting sched...

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Problems solved by technology

However, this rigid decision-making method based on deterministic parameters is prone to performance degradation and infeasibility in an uncertain environment, and has poor adaptability to the environment, which is not conducive to stable production and operation.

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