Method for identifying combustion model of circulating fluidized bed on basis of least squares

A circulating fluidized bed and least squares technology, which is applied in the direction of combustion methods, combustion control, and fuel supply adjustment, can solve problems such as low pollution and utilization rate, and achieve strong generalization, improved model accuracy, and improved response The effect of speed and positioning accuracy

Inactive Publication Date: 2015-12-16
黄红林
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Problems solved by technology

At the same time, as a fuel, coal has long suff

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  • Method for identifying combustion model of circulating fluidized bed on basis of least squares
  • Method for identifying combustion model of circulating fluidized bed on basis of least squares
  • Method for identifying combustion model of circulating fluidized bed on basis of least squares

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Embodiment Construction

[0018] The present invention, concrete steps comprise:

[0019] Step 1, consider the CARMA model of the random process, and convert the model into a least squares structure;

[0020] Step 2, according to the one-step and recursive algorithm of basic least squares, establish parameter estimation for the circulating fluidized bed combustion process, and set the initial value of the algorithm;

[0021] Step 3, determine the sampling period T, and import the fuel quantity (input) and steam pressure (output) data of the supply boiler in the circulating fluidized bed combustion process;

[0022] Step 4. According to the recursive algorithm of basic least squares estimation, perform parameter recursive estimation and calculate and P(k);

[0023] Step 5, return to step (c), and import the input and output data again until the algorithm converges or meets the requirements.

[0024] In the application of the CARMA model to a circulating fluidized bed combustion process, the structur...

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Abstract

The invention discloses a method for identifying a combustion model of a circulating fluidized bed on the basis of least squares. The method is characterized in that a method of parameter estimation of basic least squares is used for the control method. The method specifically includes the steps that (a) the model is built; (b) an initial value is set, i.e., parameter estimation is built for the combustion process of the circulating fluidized bed, and the initial value of an algorithm is set; (c) data are sampled, i.e., the data of the fuel quantity (input) and steam pressure (output) provided for a boiler in the combustion process of the circulating fluidized bed are input; (d) parameter recursive estimation is conducted; and (e) iteration convergence is conducted. Through the estimation method based on the least squares, the characteristics of a large time delay, nonlinearity and strong coupling of combustion of the boiler are considered sufficiently, the recursive model is built, and real-time control and on-line correction of a computer are facilitated; therefore, the precision of the built model is greatly improved, and input and output models of other industrial objects are easily built while the reaction speed and position control precision of a process system are increased effectively.

Description

【Technical field】 [0001] The invention relates to the technical field of automatic control, in particular to the technical field of least squares-based combustion model identification of a circulating fluidized bed. 【Background technique】 [0002] At present, coal is the main primary energy in our country, and coal power accounts for more than 70% of the total power generation. There are also a large number of industrial boilers that consume hundreds of millions of tons of coal every year. From the perspective of our country's natural resources, this situation will hardly change fundamentally for a long time. At the same time, coal, as a fuel, has long faced the problems of serious pollution and low utilization. Because of this, fluidized bed (bubbling fluidized bed) boilers appeared in my country as early as the early 1960s, and circulating fluidized bed boilers developed rapidly again in the late 1980s and early 1990s. The main advantages of the circulating fluidized bed...

Claims

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Application Information

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IPC IPC(8): F23N1/08
Inventor 杨海霞黄红林
Owner 黄红林
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