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Filtering method, device and control system based on new approximate sliding window filter

A filter and sliding window technology, applied in electrical components, digital technology networks, impedance networks, etc., can solve problems such as difficulty and difficulty in adjusting control efficiency, and achieve the goal of improving efficiency, improving control quality, and reducing filter phase lag. Effect

Active Publication Date: 2022-06-24
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0005] The purpose of the present invention is to provide a filtering method, device and control system based on a new approximate sliding window filter, which is used to filter the process signal of the furnace pressure control system of a thermal power unit with a new approximate sliding window filter, relatively adopting Existing approximate sliding window filter filtering, the present invention further improves the efficiency of output tracking input, that is, further reduces the filtering phase lag, which is conducive to further improving the control quality of the furnace pressure control system to solve the existing ASWF output tracking It is difficult to adjust the efficiency of the input, so it is difficult to adjust the control efficiency including the furnace pressure control system of the thermal power unit

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  • Filtering method, device and control system based on new approximate sliding window filter

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Embodiment Construction

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] It should be understood that the step numbers used in the text are only for the convenience of description, and are not used as a limitation on the order of execution of the steps.

[0057] It should be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in this specification and the appended claims...

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Abstract

The invention discloses a novel filtering method, device and control system of an approximate sliding window filter. The method includes: inputting an input signal into a new approximate sliding window filter to obtain an output signal of a new approximate sliding window filter; wherein, the input signal is specifically a process signal of a furnace pressure control system of a thermal power unit; The new approximate sliding window filter output signal is input to the furnace pressure control system to allow the furnace pressure control system to regulate the furnace pressure. From the perspective of improving efficiency, compared with the existing approximate sliding window filter filtering, the present invention can further improve the efficiency of the output signal tracking the input signal, that is, further reduce the filtering phase lag, and is conducive to further improving the control quality of the furnace pressure control system . In addition, the new approximate sliding window filter can be used to construct other control systems, so that the control efficiency of the control system can be adjusted to meet the different needs of the actual control process.

Description

technical field [0001] The invention relates to the technical field of process control of thermal power units, in particular to a filtering method, device and control system based on a novel approximate sliding window filter. Background technique [0002] In the field of process control of thermal power units, the process signals of some control systems are subject to obvious random interference. For example, the process signals of the furnace pressure control system of thermal power units are subject to obvious random interference. The process signals need to be filtered. The filtering processing method is to use a first-order inertia filter (First order inertia filter, FOIF for short). However, FOIF has a large filter phase lag, which has a non-negligible impact on the control quality of the furnace pressure control system. The prior art proposes an Approximate Sliding Window Filter (ASWF for short), which significantly improves the efficiency of output tracking input, th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
CPCH03H17/02
Inventor 李军
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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