Rescheduling method and rescheduling system of steel making and continuous casting on basis of genetic algorithm

Abstract

The invention provides a rescheduling method and a rescheduling system of steel making and continuous casting on the basis of a genetic algorithm. The rescheduling method comprises the following steps: by virtue of the rescheduling system, acquiring a production batch plan, the current scheduling scheme and real-time scheduling data of a steel making and continuous casting system, carrying out disturbance identification and analysis, adjusting the current scheduling scheme in small disturbance, carrying out rescheduling in large disturbance; for all furnaces in the operation-finished furnace set, adopting actual scheduling information as a rescheduling subscheme of all the furnaces in the set; for all the furnaces in an operating-furnace set, on the basis of the actual scheduling information and a rescheduling target of the operation-finished furnace set, solving according to a hybrid algorithm of flow direct and a genetic algorithm; for all the furnaces in a stopped-furnace set, on the basis of the rescheduling subscheme of the operation-finished furnace set and the rescheduling subscheme of the operating-furnace set, solving according to the hybrid algorithm of the flow direct and the genetic algorithm. The rescheduling method and rescheduling system provided by the invention have the advantages that the problem of rescheduling under random disturbance in the process of steel making and continuous casting production can be solved.

Description

technical field [0001] The invention relates to the technical field of metallurgical control, in particular to a genetic algorithm-based steelmaking-continuous casting rescheduling method and system. Background technique [0002] Steelmaking-continuous casting is a key link in the production process of modern iron and steel enterprises. There are many equipments in this section, and the production organization is compact and complex. How to carry out effective production scheduling for the steelmaking-continuous casting section is related to the smooth production and operation of the entire steel plant. or not. [0003] Various random disturbance events often occur in the actual production process, which makes the scheduling scheme being executed invalid. At this time, the plan must be re-compiled on the basis of the original scheduling based on the real-time scheduling information, that is, re-scheduling. The rescheduling of steelmaking-continuous casting is related to th...

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Problems solved by technology

This scheme can shorten the dynamic scheduling time and maintain the stability of production. However, since the unprocessed equipment of the operating furnace is kept unchanged in the scheme, it cannot adapt to the rescheduling when any equipment fails; Zheng Zhong et al. "Steelmaking-Continuous Casting Production Scheduling and Re-planning Method in Steel Plants" proposes re-scheduling heat classification processing, and the algorithm solves quickly, but the allocation of furnace equipment is only determined by heuristic rules. The steel-continuous casting rescheduling problem is sometimes difficult to obtain a feasible solution; Roy R et al. proposed a knowledge model consisting of three modules of task, reasoning and domain in "Development of a knowledge model for managing schedule disturbance in steel-making" To manage various disturbance problems in the steelmaking process, a rescheduling framework structure is given, but no specific model and solution algorithm are given

Currently authorized patents, such as the Chinese patent with the publication number CN1556486A, disclose that the production plan is made through the method of reservation plan-simulation software simulation-adjustment plan, and online scheduling is carried out by using the method of combining model calculation and rule reasoning. The existing simulation scheduling software and algorithm library, the pertinence of the solution is limited; the Chinese patent with the publication number CN101520656A discloses that the difference between the actual production data and the set parameters is used as the basis for rough scheduling, and on the basis of rough scheduling , perform time-optimized scheduling mode matching, and then obtain a re-scheduling plan, but does not include disturbances such as equipment and plan changes, and only adjusts the working time of each station according to the target

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