Self-adaptive correcting method for dynamic accelerating feedforward of supercritical boiler

A supercritical boiler and dynamic acceleration technology, which is applied to lighting and heating equipment, steam generation, control systems, etc., to achieve the effect of improving compensation accuracy and stability

Inactive Publication Date: 2012-09-19
上海迪吉特控制系统有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

But the premise is also to try to improve the compensation accuracy of BIR for different regulation loops and changes in working conditions.

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  • Self-adaptive correcting method for dynamic accelerating feedforward of supercritical boiler
  • Self-adaptive correcting method for dynamic accelerating feedforward of supercritical boiler
  • Self-adaptive correcting method for dynamic accelerating feedforward of supercritical boiler

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Embodiment Construction

[0029] Attached below Figure 1 ~ Figure 3 Let's describe in detail the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention and provides specific implementation methods and system structures, but the protection scope of the present invention is not limited to the following embodiments.

[0030] The 1000MW ultra-supercritical thermal power generating unit boiler of a power plant adopts the ultra-supercritical parameter coal-fired tower once-through boiler designed and manufactured by Shanghai Boiler Factory Co., Ltd. with the introduction of Alstom technology. The steam turbine and unit unit distributed control system DCS adopt the Ovation system of Emerson Corporation of the United States.

[0031] The method of the present invention is now used in the Ovation system to optimize and modify the control logic of the coal-fired ultra-supercritical boiler control strategy of the original Alstom typi...

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Abstract

The invention discloses a self-adaptive correcting method for dynamic accelerating feedforward signals of a supercritical boiler. By adopting the method, the dynamic accelerating feedforward signals of the supercritical boiler during the load verifying process of the supercritical boiler can be intelligently and self-adaptively adjusted according to the real-time load deviation, the change rate of the temperature along with the load and time and the change rate of the pressure along with the load and the time, and the dynamic accelerating feedforward signals can be amplitude limited according to the safety allowance of the intermediate point temperature, as a result, the compensating precision of the dynamic accelerating feedforward signals is effectively improved, and overcompensation and boil overtemperature are avoided.

Description

technical field [0001] The invention relates to a thermal control technology, in particular to an adaptive correction method for a dynamic acceleration feedforward function of a boiler in a supercritical boiler analog quantity control system. Background technique [0002] At present, the vast majority of newly-built thermal power generation units at home and abroad have adopted more efficient and environmentally friendly supercritical units. The biggest difference between the supercritical unit and the previous subcritical unit is the boiler. The thermophysical characteristics of water and steam working medium itself determine that the supercritical unit can only use once-through boilers. Compared with the steam drum boiler, the working medium of the once-through boiler completely relies on the pressure head of the feed pump to pass through each heating surface at one time, and there is no fixed steam-water boundary point between the heating surfaces of each section like the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B35/00
Inventor 叶敏许晓鸣丁怡若吴乃新
Owner 上海迪吉特控制系统有限公司
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