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A Coordinated Control System of Supercritical Thermal Power Units and Its Nonlinear Anti-interference Control Method

A technology for coordinated control systems and thermal power units, applied in the general control system, control/regulation system, adaptive control, etc., can solve the problems of reducing the control quality of the coordinated control system of thermal power units, system divergence, shutdown, etc.

Active Publication Date: 2020-11-20
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] In addition, interference is ubiquitous during the operation of thermal power units, such as changes in coal quality. Interference will not only reduce the control quality of the coordinated control system of thermal power units, but may even lead to system divergence and shutdown accidents
[0004] At present, the widely used PID control has been unable to efficiently control supercritical thermal power units, and it is necessary to study advanced control methods suitable for supercritical thermal power units

Method used

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  • A Coordinated Control System of Supercritical Thermal Power Units and Its Nonlinear Anti-interference Control Method
  • A Coordinated Control System of Supercritical Thermal Power Units and Its Nonlinear Anti-interference Control Method
  • A Coordinated Control System of Supercritical Thermal Power Units and Its Nonlinear Anti-interference Control Method

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Embodiment Construction

[0092] The technical solutions provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0093] Such as figure 1 As shown, a coordinated control system for supercritical thermal power units, the system includes supercritical thermal power units, global fuzzy model, fuzzy model predictive controller, disturbance compensator, operating point setter, output estimator and fuzzy amplification state observation device;

[0094] The global fuzzy model is based on the operating quantity u of the supercritical thermal power unit k and output y k Establishing, the fuzzy model predictive controller, disturbance compensator, output estimator and fuzzy augmented state observer are all established based on the global ...

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Abstract

The invention discloses a supercritical thermal power unit coordinated control system and a nonlinear anti-interference control method thereof. The system comprises a supercritical thermal power unit,a global fuzzy model, a fuzzy model prediction controller, a disturbance compensator, an operation point setter, an output estimator and a fuzzy augmented state observer. The control method comprisessteps: the field operation data of the supercritical thermal power unit are acquired; the global fuzzy model of the supercritical thermal power unit is built; the operation volume of the supercritical thermal power unit is calculated; and based on the operation volume of the supercritical thermal power unit, the pulverized coal amount, the feedwater flow and the opening of a main steam regulationvalve are regulated, and the main steam pressure of the supercritical thermal power unit, the enthalpy and the power generation power of a steam turbine are controlled. Complex characteristics of nonlinearity, strong coupling, large inertia and parameter time varying and the like existing in the supercritical thermal power unit can be overcome, and besides, uncertain unknown interference can be compensated. The safety and the peak regulating ability of the supercritical thermal power unit are improved, and the stability of the power grid is maintained.

Description

technical field [0001] The invention relates to a thermal automatic control method, in particular to a supercritical thermal power unit coordination control system and a nonlinear anti-interference control method thereof. Background technique [0002] Supercritical thermal power units have the advantages of high efficiency and low emissions, and are the main thermal power units currently under construction in my country. However, supercritical thermal power units have the characteristics of nonlinearity, strong coupling, large inertia, time-varying parameters, and limited input. grid stability. [0003] In addition, interference is ubiquitous during the operation of thermal power units, such as changes in coal quality. Interference will not only reduce the control quality of the coordinated control system of thermal power units, but even cause system divergence and shutdown accidents. [0004] At present, the widely used PID control has been unable to efficiently control t...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 潘蕾陈琛沈炯韩四维
Owner SOUTHEAST UNIV
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