Multi-flow fluidized bed boiler collaborative control method, device and medium

Abstract

The application discloses a kind of multi-flow fluidized bed boiler collaborative control method, equipment and medium, applied to advanced process control field.The method comprises: obtaining the pressure change rate corresponding to mother pipe pressure signal;According to the size and absolute value of pressure change rate, determine the load adjustment instruction corresponding to boiler, and according to pressure change rate and the load adjustment amount corresponding to the furnace nature parameter of boiler;If in the process that boiler carries out load adjustment according to load adjustment instruction and load adjustment amount, the absolute value of the second derivative of pressure change rate is not less than decoupling threshold, then according to the second derivative of pressure change rate, determine the corresponding wind coal decoupling compensation operation, and based on wind coal decoupling compensation operation and load adjustment collaborative control.The method in this method, mother pipe pressure signal is in boiler operation belongs to feedforward signal, compared with "after the fact" feedback, improve response speed and accuracy.And wind coal decoupling compensation operation and load adjustment collaborative control, improve quality and safety economy.

Description

Technical Field

[0001] This application relates to the field of advanced process control, and in particular to a method, equipment and medium for coordinated control of multi-fluidized bed boilers. Background Technology

[0002] In the fields of thermal power and district heating, multiple fluidized bed boilers often operate in parallel, supplying steam to users through a steam header. Therefore, the header pressure is a core control indicator, and its stability directly affects the safety and quality of energy supply.

[0003] Because boiler systems are typically characterized by multiple variables, strong coupling, large inertia, and hysteresis, they are complex controlled objects. Therefore, the conventional control scheme based on DCS (Distributed Control System) is currently widely adopted, which can effectively cope with disturbances such as frequent load fluctuations and coal quality changes, and achieve accurate and stable control of the main pipe pressure.

[0004] However, in practical applications, conventional DCS-based control schemes typically employ two approaches. The first is "one-to-many" control, where a single main pressure PID (proportional, integral, derivative) controller simultaneously directs the load adjustments of multiple boilers, ignoring the differences in boiler characteristics. The second approach involves manually designating a specific boiler as a "pressure regulating boiler," responsible for primary pressure regulation, while the remaining boilers operate at fixed loads or in manual mode. Both approaches are essentially reactive, exhibiting significant lag in response and a high risk of system oscillations. Furthermore, manual intervention is required when the "pressure regulating boiler's" regulating capacity is exhausted, resulting in low automation levels, poor control quality, and room for improvement in safety and economic efficiency.

[0005] In view of the above-mentioned technologies, seeking a more intelligent, faster, and more accurate collaborative control method and system is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a method, equipment, and medium for coordinated control of multi-fluidized bed boilers. This can solve the problems of severe response lag and system oscillation caused by "post-event" feedback in existing technologies; as well as the low level of automation and poor control quality resulting from manual intervention.

[0007] To address the aforementioned technical problems, this application provides a method for coordinated control of multi-fluidized bed boilers, comprising:

[0008] Obtain the pressure change rate corresponding to the main pipe pressure signal;

[0009] The load adjustment command corresponding to the boiler is determined based on the magnitude and absolute value of the pressure change rate, and the corresponding load adjustment amount is determined based on the pressure change rate and the boiler's corresponding boiler characteristics parameters.

[0010] If, during the process of load regulation by the boiler according to the load regulation command and load regulation amount, the absolute value of the second derivative of the pressure change rate is not less than the decoupling threshold, then the corresponding air-coal decoupling compensation operation is determined based on the second derivative of the pressure change rate, and the air-coal decoupling compensation operation is used in conjunction with load regulation for coordinated control.

[0011] Preferably, obtaining the pressure change rate corresponding to the main pipe pressure signal includes:

[0012] Obtain the pressure signals of each main tube in a multi-fluidized bed boiler at different times;

[0013] The corresponding pressure change rate is determined based on the pressure signals of each header pipe.

[0014] Preferably, the load adjustment command corresponding to the boiler is determined based on the magnitude and absolute value of the pressure change rate, including:

[0015] When the rate of change of pressure is less than zero and the absolute value of the rate of change of pressure is greater than the first threshold, the load adjustment command represents a load increase adjustment command.

[0016] When the rate of change of pressure is greater than zero and the absolute value of the rate of change of pressure is greater than the second threshold, the load adjustment command represents a load reduction adjustment command.

[0017] Preferably, when the load adjustment command represents an increase in load adjustment command, the boiler with the fastest response speed is adjusted first; when the load adjustment command represents a decrease in load adjustment command, the boiler with the greatest thermal inertia is adjusted first.

[0018] Preferably, the corresponding load adjustment is determined based on the pressure change rate and the boiler's corresponding boiler characteristics, including:

[0019] Obtain the absolute value of the rate of change of pressure;

[0020] Obtain the boiler's corresponding furnace performance parameters;

[0021] Obtain the system gain coefficient corresponding to the multi-fluidized bed boiler;

[0022] Based on the adjustment range formula, determine the absolute value of the pressure change rate, the furnace characteristics parameters, and the load adjustment corresponding to the system gain coefficient;

[0023] The formula for the adjustment range is as follows:

[0024] ;

[0025] in, For the first The load adjustment amount corresponding to each boiler; The system gain coefficient; This is the absolute value of the rate of change of pressure; For the first The boiler characteristics parameters corresponding to each boiler.

[0026] Preferably, the formula for the boiler's corresponding furnace performance parameters is:

[0027] ;

[0028] in, For the first The boiler performance parameters corresponding to each boiler; These are the fitting coefficients; The base is the natural number; The time required for the boiler to actually reach the preset load; The time required for the boiler to theoretically reach its preset load.

[0029] Preferably, the corresponding wind-coal decoupling compensation operation is determined based on the second derivative of the pressure change rate, including:

[0030] If the second derivative of the rate of change of pressure is less than zero, then according to the proportion Increase air volume and coal feed rate;

[0031] in, , ;

[0032] This refers to the air volume lead gain coefficient. The benchmark air-coal ratio coefficient; This is the absolute value of the second derivative of the rate of change of pressure; This is the second derivative of the rate of change of pressure.

[0033] Preferably, determining the corresponding wind-coal decoupling compensation operation based on the second derivative of the pressure change rate further includes:

[0034] If the second derivative of the rate of change of pressure is greater than zero, then according to the proportion Reduce coal and air volume;

[0035] in, , ;

[0036] This is the gain coefficient for prioritizing coal reduction; The benchmark coal-to-air ratio coefficient; This is the absolute value of the second derivative of the rate of change of pressure; This is the second derivative of the rate of change of pressure.

[0037] On the other hand, this application also provides an electronic device, including a memory for storing computer programs;

[0038] The processor is used to execute computer programs to implement the steps of the above-described multi-fluidized bed boiler collaborative control method.

[0039] On the other hand, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described multi-fluidized bed boiler collaborative control method.

[0040] The multi-fluidized bed boiler collaborative control method provided in this application is based on the main pipe pressure signal for control. This main pipe pressure signal is a feedforward signal during boiler operation; therefore, this application employs feedforward regulation, thus improving response speed compared to "post-event" feedback. During boiler regulation, the specific load adjustment amount fully considers the characteristic differences of different boilers, i.e., the corresponding boiler performance parameters, to maximize regulation accuracy. Furthermore, in addition to its own load regulation, this application, under certain conditions, employs air-coal decoupling compensation operation and load regulation collaborative control, expanding its application scenarios and scope. Moreover, this application is a fully automatic regulation method, offering a higher level of automation, higher control quality, and improved safety and economy compared to manual regulation. Attached Figure Description

[0041] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A flowchart of a multi-fluidized bed boiler collaborative control method provided in this application embodiment;

[0043] Figure 2 The system core architecture diagram provided for the embodiments of this application;

[0044] Figure 3 A structural diagram of an electronic device provided in another embodiment of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0046] The core of this application is to provide a method, equipment, and medium for coordinated control of multi-fluidized bed boilers.

[0047] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Figure 1 A flowchart of a multi-fluidized bed boiler collaborative control method provided in this application embodiment is shown below. Figure 1 As shown, it includes the following steps:

[0049] S10: Obtain the pressure change rate corresponding to the main pipe pressure signal.

[0050] In a specific embodiment, when the boiler in the multi-fluidized bed boiler system is running, the pressure transmitter in the multi-fluidized bed boiler system acquires the pressure signals of each main pipe in the multi-fluidized bed boiler at different times in real time. Then, the differential processor calculates the pressure change rate. The magnitude of the pressure change rate can reflect the stability of the system. When the absolute value of the pressure change rate is small, it indicates that the current system has small fluctuations; while when the absolute value of the pressure change rate is large, it indicates that the current system has large fluctuations.

[0051] The rate of change of pressure can be calculated using the central difference method; therefore, the calculation formula is as follows: ;in, This represents the rate of change of pressure. , , , These are the main pipe pressure signals at different times.

[0052] S11: Determine the corresponding load adjustment command for the boiler based on the magnitude and absolute value of the pressure change rate, and determine the corresponding load adjustment amount based on the pressure change rate and the boiler's corresponding furnace characteristics parameters.

[0053] Since the rate of change of the main pipe pressure signal is determined based on the main pipe pressure signal at different times, when the rate of change of pressure is greater than zero, it means that the pressure signal at the current time is less than the pressure signal at the next time, which indicates that the pressure is rising. In this case, in order to ensure system stability, the pressure needs to be adjusted downward. When the rate of change of pressure is less than zero, it means that the pressure signal at the current time is greater than the pressure signal at the next time, which indicates that the pressure is falling. In this case, in order to ensure system stability, the pressure needs to be adjusted upward.

[0054] In practical applications, to avoid resource waste and frequent adjustments, it is necessary to further determine whether adjustment is needed based on the range of fluctuations. Generally, a certain degree of fluctuation (process fluctuation) is allowed in multi-fluidized bed boilers. That is, when the fluctuation is within a certain range, no adjustment is needed; however, when the fluctuation exceeds the range, further adjustment is required. Therefore, it is necessary to comprehensively consider the magnitude and absolute value of the pressure change rate to determine the corresponding load adjustment command for the boiler, and at the same time, determine the corresponding adjustment range (load adjustment amount) based on the pressure change rate and the boiler characteristics parameters currently being adjusted.

[0055] S12: If, during the process of load adjustment by the boiler according to the load adjustment command and load adjustment amount, the absolute value of the second derivative of the pressure change rate is not less than the decoupling threshold, then the corresponding air-coal decoupling compensation operation is determined according to the second derivative of the pressure change rate, and the air-coal decoupling compensation operation is used for coordinated control with load adjustment.

[0056] In a specific embodiment, if the second derivative of the pressure change rate (that is, the acceleration of the pressure change rate) is large, it indicates that the waveform speed of the current system is large. In this case, it is difficult to meet the stability requirements by using the boiler's self-regulation alone. Therefore, it is necessary to combine the air-coal decoupling compensation operation with coordinated control and regulation to ensure the stability of the system.

[0057] The multi-fluidized bed boiler collaborative control method provided in this application is based on the main pipe pressure signal for control. This main pipe pressure signal is a feedforward signal during boiler operation; therefore, this application employs feedforward regulation, thus improving response speed compared to "post-event" feedback. During boiler regulation, the specific load adjustment amount fully considers the characteristic differences of different boilers, i.e., the corresponding boiler performance parameters, to maximize regulation accuracy. Furthermore, in addition to its own load regulation, this application, under certain conditions, employs air-coal decoupling compensation operation and load regulation collaborative control, expanding its application scenarios and scope. Moreover, this application is a fully automatic regulation method, offering a higher level of automation, higher control quality, and improved safety and economy compared to manual regulation.

[0058] Based on the above embodiments, as a preferred embodiment, the load adjustment command corresponding to the boiler is determined according to the magnitude and absolute value of the pressure change rate, including:

[0059] When the rate of change of pressure is less than zero and the absolute value of the rate of change of pressure is greater than the first threshold, the load adjustment command represents a load increase adjustment command.

[0060] When the rate of change of pressure is greater than zero and the absolute value of the rate of change of pressure is greater than the second threshold, the load adjustment command represents a load reduction adjustment command.

[0061] In a specific embodiment, when the rate of pressure change is less than zero ( This indicates that the pressure signal at the current moment is greater than the pressure signal at the next moment, which signifies a pressure decrease. Simultaneously, the absolute value of the pressure change rate is greater than the first threshold. If the fluctuation exceeds the allowable range, the load adjustment command indicates an increase in load. Based on this, to adjust as quickly as possible, the boiler with the fastest response speed in the system is prioritized for adjustment. The reason for prioritizing the boiler with the fastest response speed is that when increasing the load (or increasing the steam pressure), the steam shortage needs to be filled quickly, thus requiring the contribution of the most additional steam in the shortest time. Therefore, the boiler with the fastest response rate is prioritized for adjustment.

[0062] When the rate of change of pressure is greater than zero ( This indicates that the pressure signal at the current moment is less than the pressure signal at the next moment, which signifies a pressure increase. Simultaneously, the absolute value of the pressure change rate is greater than the second threshold. If the current fluctuation exceeds the allowable range, then the load adjustment command indicates a load reduction adjustment command. Based on this, to adjust as quickly as possible, the boiler with the highest thermal inertia in the system is prioritized for adjustment. The reason for prioritizing the boiler with the highest thermal inertia is that a smooth transition is required during load reduction. If a boiler with low thermal inertia rapidly reduces its load, its steam output will drop sharply. Therefore, from a stability perspective, the boiler with the highest thermal inertia should be adjusted first.

[0063] During this adjustment process, its first threshold The calculation formula is:

[0064] ;

[0065] Correspondingly, the second threshold The calculation formula is:

[0066] ;

[0067] in, The total system load rate; This refers to the deviation in calorific value of the coal entering the furnace (the difference between the actual calorific value and the standard coal calorific value). The calorific value is the standard coal equivalent. , , as well as represents the fitting coefficient.

[0068] In addition, if the rate of change of pressure is equal to zero ( If the pressure signal is equal to the pressure signal at the next moment, it means that the pressure signal is not fluctuating and the system remains stable. Therefore, no action is required at this time.

[0069] It is easy to understand at this point that, after determining whether to adjust the load or reduce it, in order to ensure the stability of the system, it is necessary to further determine the adjustment range. That is, the specific implementation method for determining the corresponding load adjustment amount based on the pressure change rate and the boiler's corresponding boiler characteristics is as follows:

[0070] Obtain the absolute value of the rate of change of pressure;

[0071] Obtain the boiler's corresponding furnace performance parameters;

[0072] Obtain the system gain coefficient corresponding to the multi-fluidized bed boiler;

[0073] Based on the adjustment range formula, determine the absolute value of the pressure change rate, the furnace characteristics parameters, and the load adjustment corresponding to the system gain coefficient;

[0074] The formula for the adjustment range is as follows:

[0075] ;

[0076] in, For the first The load adjustment amount corresponding to each boiler; The system gain coefficient; This is the absolute value of the rate of change of pressure; For the first The boiler characteristics parameters corresponding to each boiler.

[0077] The formula for the boiler's corresponding furnace performance parameters is as follows:

[0078] ;

[0079] in, For the first The boiler performance parameters corresponding to each boiler; These are the fitting coefficients; The base is the natural number; The time required for the boiler to actually reach the preset load; The time required for the boiler to theoretically reach its preset load.

[0080] Furthermore, the time required for its boiler to theoretically reach the preset load. The calculation formula is:

[0081] ;

[0082] in, The quality of the bed material is calculated based on the pressure in the air chamber; The specific heat of the bed material is taken as 1.15 kJ / kg·K. Combustion efficiency is calculated using either positive or negative boiler balance. The calorific value of coal.

[0083] It should be noted that the embodiments provided in this application are only one possible way to implement the method, but are not limited to this method. Users can set their own methods according to their needs.

[0084] This application provides a method for determining the corresponding load adjustment command for a boiler based on the magnitude and absolute value of the pressure change rate, and for determining the corresponding load adjustment amount based on the pressure change rate and the boiler's corresponding boiler characteristics. This method fully considers the process fluctuations and boiler characteristics encountered during the operation of a multi-fluidized bed boiler system, ensuring stable adjustment is achieved as quickly as possible. Furthermore, with the aid of formulas, the specific adjustment range can be precisely determined, further guaranteeing the stability after adjustment.

[0085] Based on the above embodiments, as a preferred embodiment, the specific implementation method of determining the corresponding wind-coal decoupling compensation operation according to the second derivative of the pressure change rate is as follows:

[0086] If the second derivative of the rate of change of pressure is less than zero, then according to the proportion Increase air volume and coal feed rate;

[0087] in, , ;

[0088] This refers to the air volume lead gain coefficient. The benchmark air-coal ratio coefficient; This is the absolute value of the second derivative of the rate of change of pressure; This is the second derivative of the rate of change of pressure.

[0089] If the second derivative of the rate of change of pressure is greater than zero, then according to the proportion Reduce coal and air volume;

[0090] in, , ;

[0091] This is the gain coefficient for prioritizing coal reduction; The benchmark coal-to-air ratio coefficient; This is the absolute value of the second derivative of the rate of change of pressure; This is the second derivative of the rate of change of pressure.

[0092] In a specific embodiment, during the process of determining the corresponding wind-coal decoupling compensation operation based on the second derivative of the pressure change rate, there is a judgment condition: only when the absolute value of the second derivative of the pressure change rate is greater than a third threshold... The subsequent air-coal decoupling compensation operation is only performed when the fluctuations are severe. This involves quickly adjusting the coal feeder speed and the fan air volume to stabilize the control system. The main reason for this is to avoid the waste of resources caused by frequent air-coal decoupling compensation operations.

[0093] Its third threshold The calculation formula is:

[0094] ;

[0095] in, The total system load rate; This refers to the deviation in calorific value of the coal entering the furnace (the difference between the actual calorific value and the standard coal calorific value). The calorific value is the standard coal equivalent. , represents the fitting coefficient.

[0096] In the process of implementing wind-coal decoupling compensation, when the second derivative of the pressure change rate is less than zero ( ), then according to proportion Increase air volume and coal feed rate; while when the second derivative of the pressure change rate is greater than zero ( ), then according to proportion Reduce the amount of coal and air fed.

[0097] In summary, the core system architecture diagram for the application of the multi-fluidized bed boiler collaborative control method is as follows: Figure 2 As shown, it includes: a pressure transmitter 101, a differential processor 102, an adaptive threshold module 103, a response coefficient module 104, a dynamic distributor 105, an actuator array 106, a coal feeder frequency converter 107, a fan frequency converter 108, and multiple fluidized bed boilers operating in parallel 109.

[0098] The pressure transmitter 101 is used to acquire pressure signals; the differential processor 102 is used to calculate the pressure change rate. The absolute value of the rate of change of pressure The second derivative of the rate of change of pressure (acceleration) and the absolute value of the second derivative of the rate of change of pressure. The adaptive threshold module 103 is used to calculate the first threshold. Second threshold and the third threshold The response coefficient module 104 is used to calculate furnace performance parameters. Dynamic allocator 105 is used to allocate based on a threshold (first threshold). Second threshold and the third threshold ) and furnace performance parameters The load adjustment command and load adjustment amount are determined; the actuator array 106 is used to send the load adjustment command and load adjustment amount to the coal feeder frequency converter 107 and the fan frequency converter 108, thereby forming a complete closed-loop control system to achieve advanced, precise and coordinated control of the main pipe pressure.

[0099] Based on this, the complete process of the multi-fluidized bed boiler collaborative control method is as follows:

[0100] Step 1: Begin.

[0101] Step 2: Acquire the main pipe pressure signal.

[0102] Step 3: Calculate the rate of pressure change and the acceleration of the rate of change of pressure .

[0103] Step 4: Determine The direction.

[0104] Step 5: If Then the pressure drops, and in When this is the case, it is preferable to reduce the load on the boiler with the greatest thermal inertia.

[0105] Step 6: If Then the pressure rises, and in When necessary, the load should be allocated to the boiler with the fastest response.

[0106] Step 7: Determine .

[0107] Step 8: If so, then in At that time, according to proportion Reduce coal and air volume; At that time, according to proportion Increase air volume and coal feed rate; if not, proceed to step 9.

[0108] Step 9: The actuator array performs the adjustment operation.

[0109] Step 10: End.

[0110] Since steps 1-10 are a summary of the above embodiments, they will not be repeated here.

[0111] Therefore, the multi-fluidized bed boiler collaborative control method provided in this application is based on the control of the main pipe pressure signal. This main pipe pressure signal is a feedforward signal during boiler operation; thus, this application employs feedforward regulation, which improves response speed compared to "post-event" feedback. During boiler regulation, the specific load regulation amount fully considers the characteristic differences of different boilers, i.e., the boiler performance parameters corresponding to different boilers, maximizing regulation accuracy. Furthermore, in addition to its own load regulation, this application, under certain conditions, employs air-coal decoupling compensation operation and load regulation collaborative control, expanding its application scenarios and scope. Moreover, this application is a fully automatic regulation method, offering a higher level of automation, higher control quality, and improved safety and economy compared to manual regulation.

[0112] Figure 3 A structural diagram of an electronic device provided in another embodiment of this application, such as... Figure 3 As shown, the electronic device includes: a memory 20 for storing computer programs;

[0113] The processor 21 is used to execute a computer program to implement the steps of the multi-fluidized bed boiler collaborative control method mentioned in the above embodiments.

[0114] The electronic devices provided in this embodiment may include, but are not limited to, smartphones, tablets, laptops, or desktop computers.

[0115] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0116] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the multi-fluidized bed boiler collaborative control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc.

[0117] In some embodiments, the electronic device may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0118] Those skilled in the art will understand that Figure 3 The structures shown do not constitute a limitation on electronic devices and may include more or fewer components than those shown.

[0119] The electronic device provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the above-mentioned multi-fluidized bed boiler collaborative control method and has the same beneficial effects.

[0120] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the above method embodiments.

[0121] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0122] The foregoing provides a detailed description of a multi-fluidized bed boiler collaborative control method, equipment, and medium. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0123] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for coordinated control of multi-fluidized bed boilers, characterized in that, include: Obtain the pressure change rate corresponding to the main pipe pressure signal; The load adjustment command corresponding to the boiler is determined based on the magnitude and absolute value of the pressure change rate, and the corresponding load adjustment amount is determined based on the pressure change rate and the boiler's corresponding boiler characteristics parameters. If, during the process of the boiler adjusting the load according to the load adjustment command and the load adjustment amount, the absolute value of the second derivative of the pressure change rate is not less than the decoupling threshold, then the corresponding air-coal decoupling compensation operation is determined according to the second derivative of the pressure change rate, and the air-coal decoupling compensation operation is used in conjunction with the load adjustment for coordinated control. The process of determining the corresponding air-coal decoupling compensation operation based on the second derivative of the pressure change rate includes: If the second derivative of the pressure change rate is less than zero, then according to the proportion Increase air volume and coal feed rate; in, , ; This refers to the air volume lead gain coefficient. The benchmark air-coal ratio coefficient; The absolute value of the second derivative of the rate of change of pressure; The second derivative of the rate of change of pressure; If the second derivative of the pressure change rate is greater than zero, then according to the proportion Reduce the coal feed rate and the air volume; in, , ; This is the gain coefficient for prioritizing coal reduction; The benchmark coal-to-air ratio coefficient; The absolute value of the second derivative of the rate of change of pressure; is the second derivative of the pressure change rate.

2. The multi-fluidized bed boiler collaborative control method according to claim 1, characterized in that, The acquisition of the pressure change rate corresponding to the main pipe pressure signal includes: Obtain the pressure signals of each main tube in the multi-fluidized bed boiler at different times; The corresponding pressure change rate is determined based on the pressure signals of each of the main pipes.

3. The multi-fluidized bed boiler collaborative control method according to claim 1, characterized in that, The step of determining the corresponding load adjustment command for the boiler based on the magnitude and absolute value of the pressure change rate includes: When the pressure change rate is less than zero and the absolute value of the pressure change rate is greater than a first threshold, the load adjustment command represents a load increase adjustment command. When the pressure change rate is greater than zero and the absolute value of the pressure change rate is greater than the second threshold, the load adjustment command represents a load reduction adjustment command.

4. The multi-fluidized bed boiler collaborative control method according to claim 3, characterized in that, When the load adjustment command represents the load increase adjustment command, the boiler with the fastest response speed is adjusted first; when the load adjustment command represents the load decrease adjustment command, the boiler with the greatest thermal inertia is adjusted first.

5. The multi-fluidized bed boiler collaborative control method according to claim 1, characterized in that, Determining the corresponding load adjustment based on the pressure change rate and the boiler's corresponding boiler performance parameters includes: Obtain the absolute value of the pressure change rate; Obtain the boiler performance parameters corresponding to the boiler; Obtain the system gain coefficient corresponding to the multi-fluidized bed boiler; Based on the adjustment range formula, determine the absolute value of the pressure change rate, the furnace characteristics parameter, and the load adjustment amount corresponding to the system gain coefficient; The formula for the adjustment range is as follows: ； in, For the first The load adjustment amount corresponding to each of the aforementioned boilers; The system gain coefficient; The absolute value of the rate of change of pressure; For the first The boiler performance parameters corresponding to each boiler.

6. The multi-fluidized bed boiler collaborative control method according to claim 5, characterized in that, The formula for the boiler performance parameters is as follows: ； in, For the first The boiler performance parameters corresponding to each of the aforementioned boilers; These are the fitting coefficients; The base is the natural number; The time required for the boiler to actually reach the preset load; The time required for the boiler to theoretically reach the preset load.

7. An electronic device, characterized in that, Includes memory used to store computer programs; A processor is configured to execute the computer program to implement the steps of the multi-fluidized bed boiler collaborative control method as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the multi-fluidized bed boiler collaborative control method as described in any one of claims 1 to 6.

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