Control method and system of two-parameter approximate sliding window filter
A control method and sliding window technology, applied in general control systems, control/regulation systems, program control, etc., can solve the problems of difficult adjustment of the control process, different rising characteristics and falling characteristics, etc.
Inactive Publication Date: 2021-07-13
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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[0005] The object of the present invention is to provide a control method and system for a two-parameter approximate sliding window filter to solve the problem that the control process with different rising characteristics and falling characteristics is difficult to adjust
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0038] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the execution order of the steps.
[0039] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an"...
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The invention discloses a control method and system of a two-parameter approximate sliding window filter, and relates to the technical field of thermal power generating unit process control. The method comprises the following steps: inputting an input signal into a common differentiator to obtain a common differentiator output signal; inputting the common differentiator output signal to a judger to obtain a judger output signal; wherein the judger output signal is 1 or 0; respectively inputting a first time constant and a second time constant to a first input end and a second input end of a selector, and inputting the judgment device output signal to a control end of the selector to obtain a selected time constant; and taking the selected time constant as a time constant of an approximate sliding window filter, and inputting the input signal to the approximate sliding window filter to obtain a filtered signal. Two-parameter control of the approximate sliding window filter can be achieved, and the problem that the control process with different rising characteristics and falling characteristics is difficult to adjust is solved.
Description
technical field [0001] The invention relates to the technical field of thermal power unit process control, in particular to a control method and system for a double-parameter approximate sliding window filter. Background technique [0002] In the field of process control of thermal power units, the denitrification system has become the main choice for ultra-low NOx emissions of thermal power units due to its high denitrification efficiency and low secondary pollutants. However, the denitrification system has the characteristics of large delay and large inertia. Conventional controllers are difficult to balance system response characteristics, anti-disturbance characteristics and robust stability under perturbation of object parameters. [0003] In order to improve the process control performance of existing thermal power units, a new foundation controller (Newfoundation controller, NFC) is proposed in the prior art. Among them, NFC is a cascaded structure of a high-performa...
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IPC IPC(8): G05B19/418
CPCG05B19/41885G05B2219/32339Y02P90/02
Inventor 李军陈锦攀
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID