Blast furnace TRT top pressure control model based on fuzzy adaptive control and control method

Abstract

The invention discloses a blast furnace TRT top pressure control model based on fuzzy adaptive control and a control method. The blast furnace TRT top pressure control model comprises a blast furnaceTRT. One end of the blast furnace TRT is connected with blast furnace gas generated after dust removal, one path of the other end of the blast furnace TRT is connected with a generator through a pipeline, and the other path of the other end of the blast furnace TRT is connected with a gas pipe network outlet. The error e and the error change ec are adopted as input, e and ec are constantly detected during operation, fuzzy inference is carried out through the fuzzy rule, and a fuzzy matrix table is searched for parameter adjustment to meet the requirements of e and ec for PID parameter self-adjusting at different moments; and PID parameters are modified online through the fuzzy rule, the blast furnace TRT system is subjected to reasonable simplification treatment, main disturbance of the blast furnace top pressure under the normal work condition is introduced into the model, a dynamic model of the blast furnace top pressure under the normal work condition is ensured, and therefore the foundation is laid for subsequent study and analysis of the blast furnace top pressure control algorithm.

Description

technical field [0001] The invention belongs to the technical field of energy and power engineering, and in particular relates to a blast furnace TRT top pressure control system and control method based on fuzzy self-adaptive PID control. Background technique [0002] TRT (Blast Furnace Top Gas Pressure Recovery Turbine System), that is, the blast furnace top gas residual pressure recovery turbine power generation device, the main and auxiliary loops of the traditional blast furnace TRT top pressure control system adopt classic PID control. The factors affecting the stability of the blast furnace TRT top pressure control system are complex. The controlled process has the characteristics of complexity, high nonlinearity, and time-varying uncertainty, and there is a certain lag in the adjustment of the top pressure of the blast furnace by the stator blades. [0003] At present, the top pressure control of the domestic industrial blast furnace TRT system mostly relies on the tr...

AI Technical Summary

Problems solved by technology

The factors affecting the stability of the blast furnace TRT top pressure control system are relatively complex, the controlled process has the characteristics of complexity, high nonlinearity, time-varying uncertainty, etc., and there is a certain lag in the adjustment of the top pressure of the blast furnace by the stator blades

[0003] At present, the top pressure control of the domestic industrial blast furnace TRT system mostly relies on the traditional PID to realize the control method of adjusting the opening of the adjustable stator vane of the turbine, but this control method is difficult to cope with the complex change of the blast furnace top pressure system, and the control effect is poor

In addition, the electro-hydraulic position servo controller of the secondary loop of the system is controlled by an analog circuit, so that the control algorithm used for this loop cannot be improved and perfected, which limits the further optimization of the control system

With the enlargement of metallurgical blast furnaces and the continuous development of modern ironmaking technology, the requirements for the stability of blast furnace top pressure control are getting higher and higher. The traditional blast furnace top pressure control system can no longer meet the control requirements of modern blast furnace top pressure stability.

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