Desulfurization system control model, establishment method thereof and desulfurization system control method

Abstract

The invention provides a desulfurization system control model, an establishment method thereof and a desulfurization system control method. The method for establishing the desulfurization system control model comprises the following steps: 1, carrying out a step response experiment in a desulfurization system to obtain original data; 2, correcting the original data by adopting an ARMA model to obtain corrected data; 3, identifying the desulfurization system by using the correction data and adopting a least square method to obtain a transfer function model of the desulfurization system; and 4, converting the transfer function model into a state space model, and estimating and compensating uncertain characteristics and disturbance of the desulfurization system to obtain a desulfurization system control model. The model is good in adaptability to desulfurization working conditions, the desulfurization system can be estimated without knowing uncertain characteristics and disturbance of the desulfurization system, and the desulfurization system controlled by the model is high in precision, good in stability and high in anti-jamming capability.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a desulfurization system control model, its establishment method and a desulfurization system control method. Background technique [0002] With the development of industry and the improvement of people's living standards, the demand for energy is also increasing, SO in coal-fired flue gas 2 Has become the main cause of air pollution, control SO 2 The emission of polluting gases such as coal is a major task for my country to promote technological progress and sustainable development of the thermal power industry and to solve environmental pollution problems. In thermal power plants, flue gas desulfurization is an essential link; with the increasing emphasis on environmental protection, the requirements for thermal power unit emissions are becoming more and more stringent. [0003] The wet desulfurization method mainly uses limestone slurry particles and SO in flue gas...

AI Technical Summary

Problems solved by technology

Desulfurization is a very complicated process, and the desulfurization system has uncertainties and various unknown disturbances, which brings difficulties to the precise control of the desulfurization process.

The existing desulfurization system control methods generally have the following defects: 1) poor adaptability to variable working conditions, and low system stability; 2 3) Low precision and poor anti-interference ability

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