Modeling method of circulating fluidized bed boiler combustion system model

Abstract

The invention relates to a modeling method of a circulating fluidized bed boiler combustion system model. The method is characterized by comprising the following steps of: 1, collecting original data of a circulating fluidized bed boiler combustion system; 2, performing the following preprocessing on the original data; 3, performing dimension reduction processing on preprocessed sample data by a deep belief network to obtain a data set X; 4, performing fuzzy C-means clustering on the data set X obtained in the third step to obtain the clustering center and the clustering radius; and 5, using the clustering center and the clustering radius obtained in the fourth step as the center of a radial basis function of a radial basis function neural network and the initial valve of an expansion constant, using a gradient descent algorithm to train the radial basis function neural network, and forming the deep belief network and the radial basis function neural network obtained through training into the circulating fluidized bed boiler combustion system model. The modeling method provided by the invention is effective and reasonable.

Description

technical field [0001] The invention relates to a modeling method of a combustion system model of a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed boiler has the advantages of wide fuel adaptability and low pollution emission. It is a coal combustion technology widely promoted at home and abroad. Since the combustion system of circulating fluidized bed boiler has the characteristics of multi-variable, nonlinear, strong coupling, time-varying, large inertia, parameter distribution, etc., there are many strong coupling links, the mechanism modeling is difficult, and it is a kind of thermal object that is difficult to control typical. Therefore, it is very necessary to analyze and model qualitatively and quantitatively. [0003] Due to the complexity of the structure of the circulating fluidized bed boiler body and the combustion process during operation, it is very difficult to model the mechanism of the circulating fluidized bed bo...

AI Technical Summary

Problems solved by technology

[0003] Due to the complexity of the structure of the circulating fluidized bed boiler body and the combustion process during operation, it is very difficult to model its mechanism

The main problems at present: (1), the model is not accurate enough, there are many empirical formulas and approximate rules in the mechanism modeling, so no matter how well the simulation system works, there is still a big gap with the real boiler combustion process; (2), The model is very complex, including many nonlinear equations, it is difficult to find an effective numerical method for real-time simulation

At present, the existing research is mainly about the overall field experimental modeling of the combustion system, which is mainly used as the basis for qualitative analysis, and the experimental results are difficult to meet the needs of the design control system.

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