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Dynamic optimization and parameter estimation integrated method based on load prediction

A technology of dynamic optimization and parameter estimation, applied in warm-up, calculation, electrical digital data processing, etc., can solve the problem that the control effect cannot meet the production safety requirements

Active Publication Date: 2015-06-10
ZHEJIANG UNIV
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Problems solved by technology

[0009] The purpose of this invention is to address the increasingly urgent demand for large-scale variable loads in the current boiler production, but the control effect of the three-impulse control widely used in the actual industry cannot meet the production safety requirements when the load changes greatly. An Integrated Method of Dynamic Optimization and Parameter Estimation Based on Load Prediction

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  • Dynamic optimization and parameter estimation integrated method based on load prediction
  • Dynamic optimization and parameter estimation integrated method based on load prediction
  • Dynamic optimization and parameter estimation integrated method based on load prediction

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] The working process of the method of the present invention is as figure 1 , 2 Shown:

[0035] Step (1). The specific boiler object selected in this example is the Swedish P16-G16 160MW thermal power unit. based on The fourth-order model, the full simultaneous simulation model of the boiler steam-water system is established under AMPL. The discretization method used in this example is the finite element orthogonal configuration method.

[0036] The size of the model after discretization is related to the number of finite elements and the number of configuration points. The number of finite elements used in this example is 50, and each finite element has 3 configuration points. The entire simulation time is 1500s, and at t=150s A large step change occurs in the steam load.

[0037] Step (2). At t=0s, it is known that the steam load...

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Abstract

The invention discloses a dynamic optimization and parameter estimation integrated method based on load prediction. In order to solve problems that in actual industrial production, the boiler load demand can change substantially and easily, and traditional three-impulse control cannot ensure that each operation point has the better control effect as a linear controller, a dynamic optimization strategy based on load prediction information is put forward, the effect caused by model mismatch on the dynamic optimization effect is considered, then the parameter estimation and dynamic optimization integrated method is put forward, by the aid of load change information, the operation quantity is allowed to change before the load change, and a liquid level in the opposite direction is reserved in advance, so that the fluctuation of the liquid level in positive and negative directions is more balanced and cannot exceed the safety range easily, and the optimal solution of an actual object can still be obtained in case of model mismatch.

Description

technical field [0001] The invention belongs to the field of optimal control of steam drum water level in a boiler steam-water system, and relates to a dynamic optimization and parameter estimation integration method based on load prediction, which is used for effective control of steam drum water level under the condition of large-scale variable load. Background technique [0002] The boiler is one of the most important components in the thermal power unit, and its operating status will directly affect the normal operation of the entire thermal power unit. Drum water level is a key parameter in boiler steam-water system. Whether it is normal or not will directly affect whether the boiler can operate safely. Therefore, the control of steam drum water level is a very critical link in the entire boiler system. If the water level of the steam drum exceeds the safety upper limit, it will cause a large amount of water in the steam to enter the superheater or steam turbine, potent...

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Application Information

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IPC IPC(8): F22D5/26G06F17/50
Inventor 冯竹芹赵均徐祖华邵之江
Owner ZHEJIANG UNIV
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