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Thermal-power-plant boiler main steam temperature control method based on fractional order proportional-integral (PI) dynamic matrix

A technology of dynamic matrix control and main steam temperature, which is applied in steam generation, control system, lighting and heating equipment, etc., and can solve problems such as tracking speed and thermal efficiency optimization.

Inactive Publication Date: 2015-12-23
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0005] The invention provides a thermal power plant boiler main steam temperature control method based on the fractional PI dynamic matrix to solve the problem that the prior art cannot take into account the tracking speed and thermal efficiency optimization

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  • Thermal-power-plant boiler main steam temperature control method based on fractional order proportional-integral (PI) dynamic matrix
  • Thermal-power-plant boiler main steam temperature control method based on fractional order proportional-integral (PI) dynamic matrix
  • Thermal-power-plant boiler main steam temperature control method based on fractional order proportional-integral (PI) dynamic matrix

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with the accompanying drawings.

[0064] figure 1 It is a schematic diagram of the principle of the method of the present invention, figure 2 It is a flow chart of the method of the present invention, as figure 2 The shown method for controlling the main steam temperature of a thermal power plant boiler based on a fractional PI dynamic matrix includes the following steps:

[0065] Step A, establish the model of the main steam temperature system of the thermal power plant boiler according to the step response data of the thermal power plant boiler main steam temperature system, the specific method is:

[0066] A1. Operate the desuperheating spray valve so that there is a step change in the input desuperheating spray volume, and record its step response curve;

[0067] A2, image 3 Fitting curves for the step response data of the boiler main steam temperature system in thermal power plants, such as...

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Abstract

The invention discloses a thermal-power-plant boiler main steam temperature control method based on a fractional order proportional-integral (PI) dynamic matrix. The method comprises the following steps of A, building a model of a thermal-power-plant boiler main steam temperature system according to step response data of the thermal-power-plant boiler main steam temperature system; B, working out the temperature reduction water spraying quantity u(k) according to a fractional order PI dynamic matrix control algorithm; C, adjusting the temperature reduction water spraying quantity according to u(k) worked out in the step B, and controlling the thermal-power-plant boiler main steam temperature; and D, at the next moment, returning to the step B, and repeating the step B to the step D. According to the method, a fractional order PI algorithm and a dynamic matrix control technology are combined, so that the method has the advantages of the fractional order PI algorithm and the advantages of the dynamic matrix control technology. The control precision is high, the tracking speed is high and free of overshooting, steady-state errors are small, the load change adaptability and the interference rejection capability are high, the stability and the dynamic performance of main steam temperature control are guaranteed, and the heat efficiency is improved. The method is beneficial for protection of an on-site execution mechanism and suitable for an industrial site.

Description

technical field [0001] The invention belongs to the technical field of thermal automatic control, and relates to a method for controlling the main steam temperature of a thermal power plant boiler, in particular to a method for controlling the main steam temperature of a thermal power plant boiler based on a fractional PI dynamic matrix. Background technique [0002] In the past ten years, my country's economy has developed rapidly, the problem of environmental pollution has become increasingly serious, and the demand for energy saving and consumption reduction has become increasingly strong. In the development of the power industry, with the continuous construction of thermal power generating units with large capacity and high parameters, it is very urgent to improve the operating efficiency and thermal economy of the units. The main steam temperature of the boiler is an important factor affecting the thermal efficiency of thermal power plants. The purpose of the adjustment...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B35/00
Inventor 郭伟陈琛李涛周丽陆振宇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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