Method for optimizing operation of coal-fired thermal power fan unit

Abstract

The invention relates to the technical field of coal-fired thermal power fan unit control, and discloses a coal-fired thermal power fan unit operation optimization method, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps that target parameters and adjusting parameters in the operation process of the coal-fired thermal power fan unit are monitored, the target parameters comprise the hearth oxygen amount and / or the fan efficiency, and the adjusting parameters comprise the rotating speed of a fan and the opening degree of an air door; when at least one of the target parameter and the adjustment parameter is not in the corresponding target range, adjusting the adjustment parameter until the adjusted target parameter and adjustment parameter are in the respective target range; the adjustment parameters are adjusted by executing power frequency adjustment or variable frequency adjustment of the fan, the power frequency adjustment includes keeping the frequency of the fan unchanged and adjusting the opening degree of an air door of the fan, and the variable frequency adjustment includes keeping the opening degree of the air door of the fan unchanged and adjusting the frequency of the fan. By adopting the method, the efficiency of the fan can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of control technology for coal-fired thermal power fan units, and more specifically, to an operation optimization method for coal-fired thermal power fan units, a computer device, a computer-readable storage medium, and a computer program product. Background Art

[0002] Currently, coal-fired thermal power fan units usually include boilers, steam turbines, generators, and auxiliary equipment, etc. Fans are important auxiliary machines in thermal power plants, and the operating efficiency of fan units directly affects the production efficiency of electric energy. The existing operation of fan units mainly relies on manual operation and cannot generate corresponding electricity according to actual electricity demand. Therefore, how to improve the efficiency of fans is crucial. Summary of the Invention

[0003] In order to solve the problem of how to improve the efficiency of fans, the present invention provides an operation optimization method for coal-fired thermal power fan units, a computer device, a computer-readable storage medium, and a computer program product, which will improve the efficiency of fans.

[0004] To achieve the above object, according to the first aspect of the present invention, an operation optimization method for coal-fired thermal power fan units is provided, and the method includes:

[0005] Monitoring target parameters and adjustment parameters during the operation of the coal-fired thermal power fan unit, where the target parameters include furnace oxygen content and / or fan efficiency, and the adjustment parameters include the rotational speed and damper opening of the fan;

[0006] In the case where at least one of the target parameters and the adjustment parameters is not within the corresponding target range, adjusting the adjustment parameters until both the adjusted target parameters and the adjustment parameters are within their respective target ranges; adjusting the adjustment parameters includes performing power frequency adjustment or variable frequency adjustment of the fan, where the power frequency adjustment includes keeping the frequency of the fan unchanged and adjusting the damper opening of the fan, and the variable frequency adjustment includes keeping the damper opening of the fan unchanged and adjusting the frequency of the fan.

[0007] Further, keeping the frequency of the fan unchanged and adjusting the damper opening of the fan includes keeping the frequency of the fan at the rated frequency and adjusting the damper opening of the fan.

[0008] Further, keeping the damper opening of the fan unchanged and adjusting the frequency of the fan includes keeping the damper opening of the fan at the maximum damper opening and adjusting the frequency of the fan.

[0009] Further, the above operation optimization method for coal-fired thermal power fan units further includes respectively establishing a unit operation optimization case library and a unit operation constraint case library; determining the target ranges of the target parameters under different loads and coal types entering the furnace according to the unit operation optimization case library; and determining the target ranges of the adjustment parameters under different working conditions according to the unit operation constraint case library.

[0010] Further, an operation optimization case library for the unit is established, including obtaining economic performance data of the unit under different loads, different types of coal fed into the furnace, and different furnace oxygen contents. The economic performance data includes the standard coal consumption for power supply. According to the economic performance data of the unit under different loads, different types of coal fed into the furnace, and different furnace oxygen contents, a "load - type of coal fed into the furnace - furnace oxygen content" surface is established, and the surface is used to define the optimal value range of the furnace oxygen content under different loads and different types of coal fed into the furnace. Based on the "load - type of coal fed into the furnace - furnace oxygen content" surface, an operation optimization case library for the unit is established.

[0011] Further, an operation constraint case library for the unit is established, including defining constraint parameters, where the constraint parameters are associated parameters of the deterioration of the unit or equipment operation caused by the change of the adjustment parameters; monitoring the change range of the constraint parameters during the adjustment process of the adjustment parameters, and stopping adjusting the adjustment parameters when the change range of the constraint parameters exceeds the change range threshold, and determining the target range of the adjustment parameters; according to the target range of the adjustment parameters and the change range of the constraint parameters of the adjustment parameters under different working conditions, an operation constraint case library for the unit is established.

[0012] Further, the above - mentioned operation optimization method for the coal - fired thermal power fan unit further includes establishing a rule library for the constraint parameters according to the operation regulations, thermal engineering adjustment regulations, and manual experience; the rule library for the constraint parameters is used to define the change range threshold of the constraint parameters under different working conditions.

[0013] According to the second aspect of the present invention, there is also provided a computer device, which includes a memory, a processor, and a computer program stored on the memory, and the processor executes the computer program to implement the steps of any one of the above - mentioned methods.

[0014] According to the third aspect of the present invention, there is also provided a computer - readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above - mentioned methods are implemented.

[0015] According to the fourth aspect of the present invention, there is also provided a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of any one of the above - mentioned methods are implemented.

[0016] Generally speaking, compared with the prior art by the above - mentioned technical solution conceived by the present invention, the following beneficial effects can be achieved:

[0017] An operation optimization method for a coal - fired thermal power fan unit provided by the present invention monitors the target parameters and adjustment parameters during the operation of the unit, and performs power - frequency adjustment or variable - frequency adjustment on the adjustment parameters according to whether at least one of the target parameters and the adjustment parameters is within the corresponding target range, until both the adjusted target parameters and the adjustment parameters return to their respective target ranges, so as to achieve the purpose of improving the efficiency of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic flowchart of an operation optimization method for a coal-fired thermal power fan unit provided by an embodiment of the present application;

[0020] Figure 2 It is a schematic flowchart of an operation optimization method for a coal-fired thermal power fan unit provided by another embodiment of the present application;

[0021] Figure 3 It is a schematic flowchart of the furnace oxygen content optimization process provided by the embodiment of the present application;

[0022] Figure 4 It is a schematic internal structure diagram of a computer device provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] The terms "first", "second", "third", etc. in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0025] Such as Figure 1As shown in the figure, an operation optimization method for a coal-fired thermal power fan unit is provided. This method can be executed by a terminal or by a server that communicates with the terminal via a network. Among them, the terminal can be, but is not limited to, various personal computers, laptop computers, smartphones, tablet computers, Internet of Things devices, etc. The server can be an independent server or implemented by a server cluster composed of multiple servers. Taking the application of this method to a terminal as an example, the following steps are included:

[0026] Step 101: Monitor the target parameters and adjustment parameters during the operation of the coal-fired thermal power fan unit.

[0027] Among them, the adjustment parameter is a parameter that can be adjusted during the operation of the unit, and the target parameter (dependent variable parameter) is the optimization target parameter for the operation of the unit. For example, during the optimization of the furnace oxygen content, the adjustment parameter can be the damper opening of the fan or the rotational speed of the fan; the optimization target is the optimal fan power at a certain load, and the furnace oxygen content is within the optimal range. The target parameters include the furnace oxygen content and / or the fan efficiency. For example, when the unit load is certain, without changing other parameters, adjust the damper opening of the fan to increase or decrease the furnace air intake, thereby changing the furnace oxygen content.

[0028] Exemplarily, the target parameters and adjustment parameters during the operation of the coal-fired thermal power fan unit are obtained in real time through the Supervisory Information System in Plant Level (SIS for short).

[0029] Step 102: When at least one of the target parameter and the adjustment parameter is not within the corresponding target range, adjust the adjustment parameter until both the adjusted target parameter and the adjustment parameter are within their respective target ranges; adjusting the adjustment parameter includes performing power frequency adjustment or variable frequency adjustment of the fan.

[0030] Among them, the power frequency adjustment includes keeping the frequency of the fan unchanged and adjusting the damper opening of the fan, and the variable frequency adjustment includes keeping the damper opening of the fan unchanged and adjusting the frequency of the fan.

[0031] In one embodiment, the fan can be adjusted from power frequency to variable frequency for variable frequency adjustment. The power frequency adjustment is to keep the frequency of the fan at the rated frequency and adjust the damper opening of the fan. At this time, the larger the damper opening of the fan, the higher the flow rate / air delivery volume, and the lower the loss caused by the damper opening.

[0032] The variable frequency adjustment is to keep the damper opening of the fan at the maximum damper opening and adjust the frequency of the fan. At this time, the rotational speed of the fan motor can be adjusted by adjusting the frequency of the fan, and reducing the frequency can reduce the power consumption of the fan.

[0033] In the above-mentioned operation optimization method for coal-fired thermal power fan units, by monitoring the target parameters and adjustment parameters during the operation of the units, and according to whether at least one of the target parameters and adjustment parameters is within the corresponding target range, the power frequency adjustment or variable frequency adjustment is performed on the adjustment parameters until both the adjusted target parameters and adjustment parameters return to their respective target ranges, so as to achieve the purpose of improving the efficiency of the fan.

[0034] In one embodiment, as Figure 2 shown, an operation optimization method for coal-fired thermal power fan units is provided. The direct influencing parameter for the fan operation is the oxygen content in the furnace. As Figure 3 shown, taking the oxygen content in the furnace as the target parameter, the oxygen content in the furnace during the operation of the fan (taking the forced draft fan as an example) is optimized.

[0035] Among them, the operation optimization adjustment is divided into open-loop adjustment and closed-loop adjustment. The open-loop adjustment is that the operation optimization adjustment program is placed in area one, but does not participate in the adjustment process of the Distributed Control System (DCS for short), and only outputs the optimization adjustment plan. The closed-loop adjustment is that the operation optimization adjustment program is placed in area one and combined with the DCS to participate in the parameter adjustment process of the DCS to form an adjustment closed-loop. The closed-loop adjustment can be considered to be manually exited, or exited and reminded after the system determines that the adjustment conditions are not met (for example, during the process of adjusting the fan speed and the opening of the outlet door, the oxygen content in the furnace is greatly affected. During the adjustment process, if the furnace negative pressure changes too much, the system needs to automatically cut off). After exiting, it is open-loop adjustment.

[0036] According to the increase and decrease of the load of the coal-fired thermal power fan unit, the operation optimization adjustment includes the operation optimization adjustment under steady-state conditions and the operation optimization adjustment under non-steady-state conditions. The steady-state condition is the condition where the load of the coal-fired thermal power fan unit is in a stable state (there is no new load instruction and the load fluctuates within a certain range within a certain period of time). The non-steady-state condition, that is, the variable condition, is the condition where the load of the coal-fired thermal power fan unit fluctuates greatly (more than 10% at one time).

[0037] Because the change ranges of the constraint parameters under steady-state conditions and non-steady-state conditions are different, the adjustment strategies of the adjustment parameters under each condition are different. When the current is in the steady-state condition, the steady-state condition adjustment program is executed; when the current is in the dynamic condition, the non-steady-state condition adjustment program is executed, and moreover, the adjustment amplitude of the adjustment parameters in the non-steady-state condition adjustment program may be larger than that of the adjustment parameters in the steady-state condition adjustment program (when the constraint parameters meet the adjustment constraints). For the specific adjustment strategy, the unit operation optimization case library and the unit operation constraint case library can be established to obtain.

[0038] The unit operation optimization case base is used to determine the target range of target parameters under different loads and different types of coal fed into the furnace (for example, at 60% load, when the calorific value of the coal fed into the furnace is 5000K, the optimal oxygen content in the furnace is 5.0%).

[0039] Establishing the unit operation optimization case base includes the following steps: obtaining in real time through SIS the economic performance data of the unit under different loads, different types of coal fed into the furnace, and different oxygen contents in the furnace, where the economic performance data includes the standard coal consumption for power supply; based on the economic performance data of the unit under different loads, different types of coal fed into the furnace, and different oxygen contents in the furnace, establishing a "load-coal type fed into the furnace-oxygen content in the furnace" surface, which is used to define the optimal value range of the oxygen content in the furnace under different loads and different types of coal fed into the furnace; and establishing the unit operation optimization case base based on the "load-coal type fed into the furnace-oxygen content in the furnace" surface.

[0040] The unit operation constraint case base is used to determine the target range of adjustment parameters under different working conditions. For example, the change in the damper opening of the forced draft fan will cause changes in the furnace negative pressure, the outlet pressures of the two forced draft fans and the pressure deviation, the currents of the two forced draft fans, and the main and reheat steam temperatures of the boiler. Some of these parameters affect the operation safety of the unit (such as the furnace negative pressure), and some affect the operation safety of the equipment (forced draft fan) (the outlet pressure of the forced draft fan, such as surging, uneven wind pressure on both sides, etc.). It is necessary to track the adjustment process of the above parameters. Once the constraint parameters of the adjustment parameters change beyond a certain range during the adjustment process, the automatic adjustment should be stopped and manual intervention should be carried out.

[0041] Establishing the unit operation constraint case base includes the following steps: defining constraint parameters, where the constraint parameters are the associated parameters of the deterioration of the unit or equipment operation caused by the change of the adjustment parameters (for example, the above parameters such as the furnace negative pressure, the outlet pressures of the two forced draft fans and the pressure deviation, the currents of the two forced draft fans, the main and reheat steam temperatures of the boiler, and the load in the optimization adjustment of the oxygen content in the furnace are the constraint parameters); establishing a rule base for the constraint parameters according to the operation regulations, thermal engineering adjustment regulations, and manual experience, where the rule base for the constraint parameters is used to define the change amplitude threshold of the constraint parameters under different working conditions; monitoring the change amplitude of the constraint parameters during the adjustment process of the adjustment parameters, stopping the adjustment of the adjustment parameters when the change amplitude of the constraint parameters exceeds the change amplitude threshold, and determining the target range of the adjustment parameters; and establishing the unit operation constraint case base according to the target range of the adjustment parameters under different working conditions and the change range of the constraint parameters of the adjustment parameters.

[0042] This application also provides a computer device, and its internal structure diagram can be as Figure 4As shown in the figure. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it realizes an operation optimization method for a coal-fired thermal power fan unit. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the computer device housing, or an external keyboard, touchpad, or mouse, etc.

[0043] Those skilled in the art can understand that Figure 4 the structure shown in the figure is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0044] As Figure 4 shown in the figure, this application also provides a computer device, which includes a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to implement the steps in the above method embodiments.

[0045] This application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor, it implements the steps in the above method embodiments. Among them, the computer-readable storage medium may include, but is not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, microdrives, and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic cards or optical cards, nano-systems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and / or data.

[0046] The present application also provides a computer program product, including a computer program which, when executed by a processor, implements the steps in the above method embodiments.

[0047] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0048] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] As described above, the above are only exemplary embodiments of the present disclosure, and the scope of the present disclosure cannot be limited thereby. That is, any equivalent changes and modifications made according to the teachings of the present disclosure still fall within the scope covered by the present disclosure. Those skilled in the art will readily think of the implementation schemes of the present disclosure after considering the specification and practicing the present disclosure. The present application aims to cover any variations, uses or adaptive changes of the present disclosure, and these variations, uses or adaptive changes follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not recorded in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

[0050] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0051] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An operation optimization method for a coal-fired thermal power fan unit, characterized in that, Including: Monitoring target parameters and adjustment parameters during the operation of a coal-fired thermal power fan unit, where the target parameters include furnace oxygen content and / or fan efficiency, and the adjustment parameters include the rotational speed and damper opening of the fan; When at least one of the target parameters and the adjustment parameters is not within the corresponding target range, adjusting the adjustment parameters until both the adjusted target parameters and adjustment parameters are within their respective target ranges; the adjusting of the adjustment parameters includes performing power frequency adjustment or variable frequency adjustment of the fan, the power frequency adjustment includes keeping the frequency of the fan unchanged and adjusting the damper opening of the fan, and the variable frequency adjustment includes keeping the damper opening of the fan unchanged and adjusting the frequency of the fan.

2. The method according to claim 1, wherein The keeping the frequency of the fan unchanged and adjusting the damper opening of the fan includes: Keeping the frequency of the fan at the rated frequency and adjusting the damper opening of the fan.

3. The method according to claim 1, wherein The keeping the damper opening of the fan unchanged and adjusting the frequency of the fan includes: Keeping the damper opening of the fan at the maximum damper opening and adjusting the frequency of the fan.

4. The method according to claim 1, characterized in that, The method further includes: Respectively establishing a unit operation optimization case library and a unit operation constraint case library; According to the unit operation optimization case library, determining the target ranges of the target parameters under different loads and different coal types fed into the furnace; According to the unit operation constraint case library, determining the target ranges of the adjustment parameters under different operating conditions.

5. The method according to claim 4, wherein The establishing of the unit operation optimization case library includes: Obtaining economic performance data of the unit under different loads, different coal types fed into the furnace, and different furnace oxygen contents, where the economic performance data includes the standard coal consumption for power supply; According to the economic performance data of the unit under different loads, different coal types fed into the furnace, and different furnace oxygen contents, establishing a "load - coal type fed into the furnace - furnace oxygen content" surface, which is used to define the optimal value range of the furnace oxygen content under different loads and different coal types fed into the furnace; Based on the "load - coal type fed into the furnace - furnace oxygen content" surface, establishing a unit operation optimization case library.

6. The method according to claim 4, wherein The establishing of the unit operation constraint case library includes: Defining constraint parameters, where the constraint parameters are associated parameters of the deterioration of the operation of the unit or equipment caused by the change of the adjustment parameters; Monitoring the change range of the constraint parameters during the adjustment process of the adjustment parameters, and stopping adjusting the adjustment parameters when the change range of the constraint parameters exceeds the change range threshold, and determining the target range of the adjustment parameters; According to the target ranges of the adjustment parameters and the change ranges of the constraint parameters of the adjustment parameters under different operating conditions, establishing a unit operation constraint case library.

7. The method according to claim 6, wherein The method further includes: According to the operation regulations, thermal engineering adjustment regulations, and manual experience, establishing a rule library for the constraint parameters; The rule library of the constraint parameters is used to define the change range threshold of the constraint parameters under different operating conditions.

8. A computer device, characterized in that, Including a memory, a processor, and a computer program stored on the memory, where the processor executes the computer program to implement the steps of the method according to any one of claims 1 - 7.

9. A computer-readable storage medium, characterized in that, Having a computer program stored thereon, where the computer program, when executed by the processor, implements the steps of the method according to any one of claims 1 - 7.

10. A computer program product, characterized in that, Including a computer program, where the computer program, when executed by the processor, implements the steps of the method according to any one of claims 1 - 7.

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