A combustion adaptive control system and method for a circulating fluidized bed boiler

Abstract

A circulating fluidized bed boiler combustion adaptive control system and method, the control system includes a self-calibration controller and an RBF neural network model estimator; the RBF neural network model estimator performs model estimation; the self-calibration controller controls the RBF neural network The given model control characteristic parameters are tuned, controlled, decoupling and compensated, and the control vector is output. The control method includes: setting the given vector, collecting the control vector; collecting it as the output vector; using the control vector and the output vector As an input, it acts on the RBF neural network model estimator to perform model estimation, and output model control characteristic parameters to the self-calibration controller; the given quantity vector and the output quantity vector are used as feedback, and the control gain matrix is ​​input into the self-calibration controller, and the self-calibration The controller completes parameter setting, decoupling compensation, and completes the adaptive control of the circulating fluidized bed boiler combustion system. The invention has safe control and stable operation.

Description

technical field [0001] The invention relates to a boiler combustion control system and method, in particular to a circulating fluidized bed boiler combustion adaptive control system and method. Background technique [0002] Circulating fluidized bed boilers have the characteristics of wide fuel applicability, low combustion temperature, wide load adjustment range, and meeting environmental protection requirements, and are widely used in electric power and thermal power industries. The combustion particles of the circulating fluidized bed boiler are large, the combustion process is long, and the thermal inertia of the boiler is large, which makes the combustion process of the fluidized bed boiler have a large hysteresis characteristic. Main steam pressure, hearth temperature, flue gas oxygen content, hearth pressure and other working conditions interact with each other, especially the coupling between main steam pressure and hearth temperature is serious; boiler fuel volume, ...

AI Technical Summary

Problems solved by technology

The hearth temperature changes frequently due to factors such as coal quality and load. When the primary air is used to control the hearth temperature, the frequent changes will seriously affect the fluidization state of the bed material and threaten the safe operation of the boiler.

Automatic control can only operate automatically in a local area under a stable environment. When the boiler load or coal type has a large change, it cannot operate stably and automatically for a long time

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