Thermal power plant boiler combustion state control method and system

Abstract

The invention relates to the technical field of boiler control, and particularly discloses a thermal power plant boiler combustion state control method and system.The thermal power plant boiler combustion state control method comprises the steps that a boiler flame image is obtained, and combustion areas are divided according to flame characteristic data of the boiler flame image; acquiring flame characteristic data of the combustion area, and determining a stability coefficient according to the flame characteristic data of the combustion area; determining a combustion state coefficient according to the stability coefficient, determining the combustion state of the combustion area according to the combustion state coefficient, and performing state control on the combustion area according to the combustion state of the combustion area. According to the method, the flame image of the boiler is divided into areas, the combustion states of different combustion areas can be accurately detected, state control is carried out according to the combustion states, the combustion state of the boiler is optimized, the combustion efficiency of the boiler is improved, and emission is reduced.

Description

Technical Field

[0001] This application relates to the technical field of boiler control, and more specifically, to a method and system for controlling the combustion state of a boiler in a thermal power plant. Background Art

[0002] In a thermal power plant, the boiler plays an important role in power production, but there are challenges in terms of its combustion efficiency and environmental protection. With the enhancement of energy efficiency and environmental protection awareness, improving the combustion efficiency of the boiler and reducing pollutant emissions have become urgent problems to be solved. Ensuring the optimal combustion state of the boiler at all times can effectively improve the combustion efficiency of the boiler and reduce pollutant emissions. Therefore, the detection and control of the combustion state of the power plant boiler become particularly important.

[0003] In the prior art, the control of the combustion state of the boiler is only limited to the detection and control of the overall state of the boiler. When problems occur in a local combustion area of the boiler, they cannot be detected in time, affecting the combustion state of the boiler. Summary of the Invention

[0004] The present invention provides a method and system for controlling the combustion state of a boiler in a thermal power plant to solve the problem that problems in a local combustion area of the boiler cannot be detected in time in the prior art, including: Obtain the boiler flame image, and divide the combustion area according to the flame feature data of the boiler flame image; Obtain the flame feature data of the combustion area, and determine the stability coefficient according to the flame feature data of the combustion area; Determine the combustion state coefficient according to the stability coefficient, determine the combustion state of the combustion area according to the combustion state coefficient, and perform state control on the combustion area according to the combustion state of the combustion area.

[0005] Further, the dividing the combustion area according to the flame feature data of the boiler flame image includes: Obtain a preset grid, divide the boiler flame image according to the preset grid to obtain a plurality of boiler flame segmentation images; Calculate the flame temperature difference value and the morphological change value of each boiler flame segmentation image to obtain the flame feature data of the boiler flame segmentation image; Establish a flame feature set according to the flame feature data, and randomly select k initial clustering centers of the flame feature set; Calculate the Euclidean distance from the flame feature data in the flame feature set to the initial clustering center, and divide the boiler flame segmentation image corresponding to each flame feature data into the corresponding clustering cluster according to the Euclidean distance from the flame feature data in the flame feature set to the initial clustering center; Calculate the mean value of the flame feature data in each clustering cluster, and re-determine the clustering center according to the mean value of the flame feature data in each clustering cluster; Repeat the above steps until the cluster centers no longer change or the number of iterations reaches the preset iteration threshold, to obtain the clustering results of the boiler flame segmentation images, and divide the combustion regions of the boiler flame segmentation images according to the clustering results.

[0006] Further, the calculating the flame temperature difference value and the morphological change value of each boiler flame segmentation image includes: Obtain the pixel mean value of the boiler flame segmentation image, and determine the corresponding image temperature according to the pixel mean value of the boiler flame segmentation image; Calculate the difference value of the image temperature between the later moment and the previous moment of the boiler flame segmentation image to obtain the flame temperature difference value; Obtain the gradient value of each pixel point of the boiler flame segmentation image, and determine the corresponding image morphological value according to the gradient mean value of the boiler flame segmentation image; Calculate the difference value of the image morphology between the later moment and the previous moment of the boiler flame segmentation image to obtain the morphological change value.

[0007] Further, the determining the stability coefficient according to the flame characteristic data of the combustion region includes: Statistically count the flame temperature difference value and the morphological change value corresponding to the cluster center of each combustion region; Obtain the boiler historical operation data, determine the correlation coefficient between the historical flame temperature difference value of each combustion region and the boiler combustion efficiency according to the boiler historical operation data, and determine the first weight value according to the correlation coefficient between the historical flame temperature difference value and the boiler combustion efficiency; According to the boiler historical operation data, determine the correlation coefficient between the historical morphological change value of each combustion region and the boiler combustion efficiency, and determine the second weight value according to the correlation coefficient between the historical morphological change value and the boiler combustion efficiency; Perform weighted summation on the flame temperature difference value and the morphological change value of the corresponding combustion region according to the first weight value and the second weight value to obtain the stability coefficient of the combustion region.

[0008] Further, the determining the combustion state coefficient according to the stability coefficient includes: Obtain the boiler current operation data, predict the boiler wall temperature distribution according to the boiler current operation data, and determine the standard wall temperature corresponding to the combustion region according to the boiler wall temperature distribution; Obtain the boiler wall temperature corresponding to the current combustion region, calculate the difference between the boiler wall temperature corresponding to the current combustion region and the standard wall temperature to obtain the initial combustion state coefficient; Correct the initial combustion state coefficient according to the stability coefficient to obtain the combustion state coefficient of the combustion region.

[0009] Further, the predicting the boiler wall temperature distribution according to the boiler current operation data includes: Obtain the historical operation data of the boiler and the corresponding boiler wall temperature distribution, and preprocess the historical operation data of the boiler and the corresponding boiler wall temperature distribution; Establish a training sample set according to the preprocessed historical operation data of the boiler and the corresponding boiler wall temperature distribution, and establish an initial wall temperature prediction model according to the training sample set; Train the initial wall temperature prediction model according to the training sample set to obtain a trained wall temperature prediction model; Input the current operation data of the boiler into the trained wall temperature prediction model to predict the boiler wall temperature distribution.

[0010] Furthermore, the correction of the initial combustion state coefficient according to the stability coefficient includes: Correct the initial combustion state coefficient according to the stability coefficient based on the combustion coefficient correction formula, and the specific combustion coefficient correction formula is

[0011] wherein, is the corrected combustion state coefficient, is the initial combustion state coefficient, is the stability coefficient, is the preset standard stability coefficient, is the preset range coefficient.

[0012] Furthermore, the determination of the combustion state of the combustion area according to the combustion state coefficient includes: Obtain the preset state parameter standard interval, calculate the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and judge whether the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold; If the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold, it is judged that the combustion state of the combustion area is a first-class state; If the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is less than or equal to the first preset threshold, it is judged that the combustion state of the combustion area is a second-class state.

[0013] Furthermore, the state control of the combustion area according to the combustion state of the combustion area includes: When the combustion state of the combustion area is a second-class state, obtain the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and control the secondary air volume of the combustion area according to the distance value between the combustion state coefficient and the preset state parameter standard interval.

[0014] To achieve the above object, the present invention also provides a combustion state control system for a thermal power plant boiler, including: The first module is used to obtain the boiler flame image and divide the combustion area according to the flame characteristic data of the boiler flame image; The second module is used to obtain the flame characteristic data of the combustion area and determine the stability coefficient according to the flame characteristic data of the combustion area; The third module is used to determine the combustion state coefficient according to the stability coefficient, determine the combustion state of the combustion area according to the combustion state coefficient, and perform state control on the combustion area according to the combustion state of the combustion area.

[0015] The beneficial effects of the present invention are as follows: By applying the above technical solutions, the present invention obtains the boiler flame image, divides the combustion area according to the flame characteristic data of the boiler flame image; obtains the flame characteristic data of the combustion area, determines the stability coefficient according to the flame characteristic data of the combustion area; determines the combustion state coefficient according to the stability coefficient, determines the combustion state of the combustion area according to the combustion state coefficient, and performs state control on the combustion area according to the combustion state of the combustion area. By dividing the area of the boiler flame image, the present invention can accurately detect the combustion state of different combustion areas, perform state control according to the combustion state, optimize the combustion state of the boiler, improve the boiler combustion efficiency, and reduce emissions. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Shows the overall flowchart of a method for controlling the combustion state of a thermal power plant boiler proposed in an embodiment of the present invention; Figure 2 Shows the structural schematic diagram of a system for controlling the combustion state of a thermal power plant boiler proposed in an embodiment of the present invention. Detailed Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0019] The embodiments of the present application provide a method for controlling the combustion state of a thermal power plant boiler, as Figure 1 shown, including: S101. Obtain the boiler flame image and divide the combustion area according to the flame characteristic data of the boiler flame image; The step of dividing the combustion area according to the flame characteristic data of the boiler flame image includes: obtaining a preset grid, segmenting the boiler flame image according to the preset grid to obtain a plurality of boiler flame segmented images; calculating the flame temperature difference value and the morphological change value of each boiler flame segmented image to obtain the flame characteristic data of the boiler flame segmented image; establishing a flame characteristic set according to the flame characteristic data, and randomly selecting k initial clustering centers of the flame characteristic set; calculating the Euclidean distance from the flame characteristic data in the flame characteristic set to the initial clustering centers, and dividing the boiler flame segmented images corresponding to each flame characteristic data into corresponding clustering clusters according to the Euclidean distance from the flame characteristic data in the flame characteristic set to the initial clustering centers; calculating the mean value of the flame characteristic data in each clustering cluster, and re-determining the clustering centers according to the mean value of the flame characteristic data in each clustering cluster; repeating the above steps until the clustering centers no longer change or the number of iterations reaches a preset iteration threshold, obtaining the clustering results of each boiler flame segmented image, and dividing the combustion area of the boiler flame segmented image according to the clustering results.

[0020] In this embodiment, flame characteristic data is established for the flame temperature difference value and the morphological change value of the boiler, and the plurality of segmented boiler flame segmented images are clustered through the flame characteristic data, and the plurality of boiler flame segmented images are divided into corresponding k clustering clusters, so that each clustering cluster is set as the combustion area, which is convenient for subsequent state control through the combustion state of the combustion area.

[0021] In some embodiments of the present application, the step of calculating the flame temperature difference value and the morphological change value of each boiler flame segmented image includes: obtaining the pixel mean value of the boiler flame segmented image, and determining the corresponding image temperature according to the pixel mean value of the boiler flame segmented image; calculating the image temperature difference between the boiler flame segmented image at the later moment and the previous moment to obtain the flame temperature difference value; obtaining the gradient value of each pixel point of the boiler flame segmented image, and determining the corresponding image morphological value according to the gradient mean value of the boiler flame segmented image; calculating the image morphological difference between the boiler flame segmented image at the later moment and the previous moment to obtain the morphological change value.

[0022] In this embodiment, the corresponding image temperature can be obtained based on the average pixel value of the boiler flame segmented image by means of colorimetric method or grayscale method, and the flame temperature difference value can be obtained by calculating the image temperature difference from the previous moment to the later moment. The image morphological value is obtained through the gradient mean value to represent the flame morphology of the corresponding image, and at the same time, the morphological change value is obtained by calculating the image morphological difference from the previous moment to the later moment, so as to obtain the flame characteristic data.

[0023] S102. Obtain the flame characteristic data of the combustion area and determine the stability coefficient according to the flame characteristic data of the combustion area; In some embodiments of the present application, determining the stability coefficient according to the flame characteristic data of the combustion region includes: statistically calculating the flame temperature difference value and the morphological change value corresponding to the clustering center of each combustion region; obtaining the historical operation data of the boiler, determining the correlation coefficient between the historical flame temperature difference value of each combustion region and the boiler combustion efficiency according to the historical operation data of the boiler, and determining the first weight value according to the correlation coefficient between the historical flame temperature difference value and the boiler combustion efficiency; determining the correlation coefficient between the historical morphological change value of each combustion region and the boiler combustion efficiency according to the historical operation data of the boiler, and determining the second weight value according to the correlation coefficient between the historical morphological change value and the boiler combustion efficiency; performing weighted summation on the flame temperature difference value and the morphological change value of the corresponding combustion region according to the first weight value and the second weight value to obtain the stability coefficient of the combustion region.

[0024] In this embodiment, based on the Pearson correlation coefficient algorithm, the correlation coefficient between the historical flame temperature difference value of each combustion region and the boiler combustion efficiency, and the correlation coefficient between the historical morphological change value of each combustion region and the boiler combustion efficiency are determined, so as to obtain the first weight value and the second weight value, and further obtain the stability coefficient of the corresponding combustion region.

[0025] S103, determining the combustion state coefficient according to the stability coefficient, determining the combustion state of the combustion region according to the combustion state coefficient, and performing state control on the combustion region according to the combustion state of the combustion region.

[0026] In some embodiments of the present application, determining the combustion state coefficient according to the stability coefficient includes: obtaining the current operation data of the boiler, predicting the boiler wall temperature distribution according to the current operation data of the boiler, and determining the standard wall temperature corresponding to the combustion region according to the boiler wall temperature distribution; obtaining the boiler wall temperature corresponding to the current combustion region, calculating the difference between the boiler wall temperature corresponding to the current combustion region and the standard wall temperature to obtain the initial combustion state coefficient; correcting the initial combustion state coefficient according to the stability coefficient to obtain the combustion state coefficient of the combustion region.

[0027] In this embodiment, by predicting the boiler wall temperature distribution, the standard wall temperature corresponding to each combustion region is predicted. Since the boiler wall temperature is affected by factors such as furnace wall scaling and corrosion, after calculating the initial combustion state coefficient through the difference between the boiler wall temperature corresponding to the current combustion region and the standard wall temperature, the initial combustion state coefficient is corrected by the stability coefficient to obtain an accurate combustion state coefficient.

[0028] In some embodiments of the present application, predicting the boiler wall temperature distribution based on the current operating data of the boiler includes: obtaining the historical operating data of the boiler and the corresponding boiler wall temperature distribution, and preprocessing the historical operating data of the boiler and the corresponding boiler wall temperature distribution; establishing a training sample set according to the preprocessed historical operating data of the boiler and the corresponding boiler wall temperature distribution, and establishing an initial wall temperature prediction model according to the training sample set; training the initial wall temperature prediction model according to the training sample set to obtain a trained wall temperature prediction model; and inputting the current operating data of the boiler into the trained wall temperature prediction model to predict the boiler wall temperature distribution.

[0029] In this embodiment, an initial wall temperature prediction model is established based on the deep learning neural network algorithm, and the initial wall temperature prediction model is trained by the training sample set, so as to obtain a trained wall temperature prediction model and output the wall temperature distribution of the boiler.

[0030] In some embodiments of the present application, correcting the initial combustion state coefficient according to the stability coefficient includes: correcting the initial combustion state coefficient according to the stability coefficient based on the combustion coefficient correction formula, and the specific combustion coefficient correction formula is

[0031] where is the corrected combustion state coefficient, is the initial combustion state coefficient, is the stability coefficient, is the preset standard stability coefficient, is the preset range coefficient.

[0032] In some embodiments of the present application, determining the combustion state of the combustion area according to the combustion state coefficient includes: obtaining the preset state parameter standard interval, calculating the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and determining whether the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold; if the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold, it is determined that the combustion state of the combustion area is a first-class state; if the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is less than or equal to the first preset threshold, it is determined that the combustion state of the combustion area is a second-class state.

[0033] In this embodiment, the distance value is obtained through the minimum absolute difference between the combustion state coefficient of the combustion area and the two endpoint values of the preset state parameter standard interval, and the combustion state of the boiler is judged through the distance value. The larger the distance value, the better the corresponding combustion state.

[0034] In some embodiments of the present application, the state control of the combustion area according to the combustion state of the combustion area includes: when the combustion state of the combustion area is the second-class state, obtaining the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and controlling the secondary air volume of the combustion area according to the distance value between the combustion state coefficient and the preset state parameter standard interval.

[0035] In this embodiment, the combustion state of the combustion area is controlled by controlling the secondary air volume of the combustion area, so as to ensure that the corresponding combustion area always maintains the optimal state.

[0036] Based on the same technical concept, as Figure 2 shown, the present invention also provides a combustion state control system for a thermal power plant boiler, including: a first module for obtaining a boiler flame image and dividing a combustion area according to the flame feature data of the boiler flame image; a second module for obtaining the flame feature data of the combustion area and determining a stability coefficient according to the flame feature data of the combustion area; a third module for determining a combustion state coefficient according to the stability coefficient, determining the combustion state of the combustion area according to the combustion state coefficient, and performing state control on the combustion area according to the combustion state of the combustion area.

[0037] By applying the above technical solutions, the present invention obtains a boiler flame image, divides a combustion area according to the flame feature data of the boiler flame image; obtains the flame feature data of the combustion area, determines a stability coefficient according to the flame feature data of the combustion area; determines a combustion state coefficient according to the stability coefficient, determines the combustion state of the combustion area according to the combustion state coefficient, and performs state control on the combustion area according to the combustion state of the combustion area. By dividing the area of the boiler flame image, the present invention can accurately detect the combustion states of different combustion areas, perform state control on the combustion states, optimize the combustion state of the boiler, improve the boiler combustion efficiency, and reduce emissions.

[0038] Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the present invention.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling the combustion state of a boiler in a thermal power plant, characterized in that, Including: Obtain the boiler flame image, and divide the combustion area according to the flame characteristic data of the boiler flame image; Obtain the flame characteristic data of the combustion area, and determine the stability coefficient according to the flame characteristic data of the combustion area; Determine the combustion state coefficient according to the stability coefficient, determine the combustion state of the combustion area according to the combustion state coefficient, and perform state control on the combustion area according to the combustion state of the combustion area.

2. The method for controlling the combustion state of a boiler in a thermal power plant according to claim 1, wherein The step of dividing the combustion area according to the flame characteristic data of the boiler flame image includes: Obtain a preset grid, segment the boiler flame image according to the preset grid, and obtain a plurality of boiler flame segmentation images; Calculate the flame temperature difference value and the morphological change value of each boiler flame segmentation image to obtain the flame characteristic data of the boiler flame segmentation image; Establish a flame characteristic set according to the flame characteristic data, and randomly select k initial clustering centers of the flame characteristic set; Calculate the Euclidean distance from the flame characteristic data in the flame characteristic set to the initial clustering center, and divide the boiler flame segmentation images corresponding to the flame characteristic data into corresponding clustering clusters according to the Euclidean distance from the flame characteristic data in the flame characteristic set to the initial clustering center; Calculate the mean value of the flame characteristic data in each clustering cluster, and re-determine the clustering center according to the mean value of the flame characteristic data in each clustering cluster; Repeat the above steps until the clustering center no longer changes or the number of iterations reaches a preset iteration threshold, obtain the clustering results of each boiler flame segmentation image, and divide the combustion area of the boiler flame segmentation image according to the clustering results.

3. The method for controlling the combustion state of a thermal power plant boiler according to claim 2, characterized in that, The step of calculating the flame temperature difference value and the morphological change value of each boiler flame segmentation image includes: Obtain the pixel mean value of the boiler flame segmentation image, and determine the corresponding image temperature according to the pixel mean value of the boiler flame segmentation image; Calculate the difference value of the image temperature between the next moment and the previous moment of the boiler flame segmentation image to obtain the flame temperature difference value; Obtain the gradient value of each pixel point of the boiler flame segmentation image, and determine the corresponding image morphological value according to the gradient mean value of the boiler flame segmentation image; Calculate the difference value of the image morphology between the next moment and the previous moment of the boiler flame segmentation image to obtain the morphological change value.

4. The method for controlling the combustion state of a thermal power plant boiler according to claim 3, wherein The step of determining the stability coefficient according to the flame characteristic data of the combustion area includes: Statistically count the flame temperature difference value and the morphological change value corresponding to the clustering center of each combustion area; Obtain the boiler historical operation data, determine the correlation coefficient between the historical flame temperature difference value of each combustion area and the boiler combustion efficiency according to the boiler historical operation data, and determine the first weight value according to the correlation coefficient between the historical flame temperature difference value and the boiler combustion efficiency; Determine the correlation coefficient between the historical morphological change value of each combustion area and the boiler combustion efficiency according to the boiler historical operation data, and determine the second weight value according to the correlation coefficient between the historical morphological change value and the boiler combustion efficiency; Perform weighted summation on the flame temperature difference value and the morphological change value of the corresponding combustion area according to the first weight value and the second weight value to obtain the stability coefficient of the combustion area.

5. The method for controlling the combustion state of a boiler in a thermal power plant according to claim 4, characterized in that, The step of determining the combustion state coefficient according to the stability coefficient includes: Obtain the current operation data of the boiler, predict the boiler wall temperature distribution according to the current operation data of the boiler, and determine the standard wall temperature corresponding to the combustion area according to the boiler wall temperature distribution; Obtain the boiler wall temperature corresponding to the current combustion area, calculate the difference between the boiler wall temperature corresponding to the current combustion area and the standard wall temperature, and obtain the initial combustion state coefficient; Correct the initial combustion state coefficient according to the stability coefficient to obtain the combustion state coefficient of the combustion area.

6. The method for controlling the combustion state of a thermal power plant boiler according to claim 5, characterized in that, The predicting the boiler wall temperature distribution according to the current operation data of the boiler includes: Obtain the historical operation data of the boiler and the corresponding boiler wall temperature distribution, and preprocess the historical operation data of the boiler and the corresponding boiler wall temperature distribution; Establish a training sample set according to the preprocessed historical operation data of the boiler and the corresponding boiler wall temperature distribution, and establish an initial wall temperature prediction model according to the training sample set; Train the initial wall temperature prediction model according to the training sample set to obtain a trained wall temperature prediction model; Input the current operation data of the boiler into the trained wall temperature prediction model to predict the boiler wall temperature distribution.

7. The method for controlling the combustion state of a thermal power plant boiler according to claim 5, characterized in that, The correcting the initial combustion state coefficient according to the stability coefficient includes: Correct the initial combustion state coefficient according to the stability coefficient based on the combustion coefficient correction formula, and the specific combustion coefficient correction formula is Among them, is the corrected combustion state coefficient, is the initial combustion state coefficient, is the stability coefficient, is the preset standard stability coefficient, is the preset range coefficient.

8. The method for controlling the combustion state of a boiler in a thermal power plant according to claim 1, wherein, The determining the combustion state of the combustion area according to the combustion state coefficient includes: Obtain the preset state parameter standard interval, calculate the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and judge whether the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold; If the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is greater than the first preset threshold, then judge that the combustion state of the combustion area is a first-class state; If the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval is less than or equal to the first preset threshold, then judge that the combustion state of the combustion area is a second-class state.

9. The method for controlling the combustion state of a boiler in a thermal power plant according to claim 8, characterized in that, The controlling the state of the combustion area according to the combustion state of the combustion area includes: When the combustion state of the combustion area is a second-class state, obtain the distance value between the combustion state coefficient of the combustion area and the preset state parameter standard interval, and control the secondary air volume of the combustion area according to the distance value between the combustion state coefficient and the preset state parameter standard interval.

10. A boiler combustion state control system for a thermal power plant, characterized in that, including: The first module is used to obtain the boiler flame image and divide the combustion area according to the flame feature data of the boiler flame image; The second module is used to obtain the flame feature data of the combustion area and determine the stability coefficient according to the flame feature data of the combustion area; The third module is used to determine the combustion state coefficient according to the stability coefficient, determine the combustion state of the combustion area according to the combustion state coefficient, and control the state of the combustion area according to the combustion state of the combustion area.

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