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660MW thermal power generating unit multi-model prediction control method based on proximity principle weighting

A 660MW, thermal power unit technology, applied in electric controllers, controllers with specific characteristics, etc., can solve problems such as the inability to meet the control requirements of nonlinear objects, improve load regulation performance and unit operation stability, and improve operation flexibility. performance, the effect of reducing fluctuations in key parameters

Inactive Publication Date: 2021-08-10
安徽华电六安电厂有限公司
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Problems solved by technology

A single linear predictive control cannot meet the control requirements of nonlinear objects during deep peak shaving, adopt multi-model predictive control, and adopt a weighting strategy based on the principle of proximity to obtain a global control effect

Method used

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  • 660MW thermal power generating unit multi-model prediction control method based on proximity principle weighting
  • 660MW thermal power generating unit multi-model prediction control method based on proximity principle weighting
  • 660MW thermal power generating unit multi-model prediction control method based on proximity principle weighting

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specific example

[0067] Step 1: Analyze the dynamic characteristics of the controlled object of the 660MW thermal power unit, and determine the input quantity of the 660MW thermal power unit coordination system, which is the control quantity, and the output quantity, which is the controlled quantity, as the basis for the research and development of the control strategy; establish the unit under different load conditions Local transfer function model;

[0068] Step 2: Design a corresponding local model predictive controller for the local transfer function models under different load conditions;

[0069] Step 3: Based on the principle of proximity, perform weighting processing on the effects of each local model predictive controller.

[0070] Based on the principle of multivariable predictive control, the local transfer function models under different load conditions are transformed into CARIMA models, and the corresponding local model predictive controllers are designed.

[0071] The actual ge...

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Abstract

The invention discloses a 660MW thermal power generating unit multi-model prediction control method based on proximity principle weighting. The method comprises the following steps: firstly, analyzing dynamic characteristics of a controlled object of a 660MW thermal power generating unit, and determining an input quantity, namely a control quantity, and an output quantity, namely a controlled quantity, of a 660MW thermal power generating unit coordination system as a basis for research and development of a control strategy; establishing a local transfer function model of the unit under different load conditions; aiming at the local transfer function models under different load working conditions, designing corresponding local model prediction controllers; and based on the principle of proximity, performing weighting processing on the action of each local model prediction controller. The performance of the 660MW thermal power generating unit coordination control system can be improved, and safe, stable and economical operation of the unit is guaranteed.

Description

technical field [0001] The invention relates to the field of automatic control of thermal power units, in particular to multi-model predictive control of 660MW thermal power units weighted based on the principle of proximity, and belongs to the field of thermal control. Background technique [0002] In order to consume clean energy on a large scale, the flexibility transformation of thermal power units is being actively carried out to tap the potential of thermal power units for peak regulation and frequency regulation. Frequent and large-scale variable operating conditions aggravate the nonlinear influence of the unit, and put forward higher requirements for the coordinated control system of supercritical furnaces. Coordinated control task difficulty for large units. [0003] At present, in the actual thermal process, the coordinated control strategy of thermal power units is mainly based on PID. The traditional linear control method can only adapt to a small range of var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 郭红闵郭新海王士博高寒刘小鹏吕磊彭博伟李黎
Owner 安徽华电六安电厂有限公司
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