Bidirectional acceleration method for wind pressure control signal and primary air pressure control system

Abstract

The present application discloses a two-way acceleration method for a wind pressure control signal and a primary wind pressure control system. By using an input differentiator, the wind pressure control signal is signal-converted to obtain a target wind pressure control signal; a positive differential signal acceleration unit is used to perform positive acceleration on the target wind pressure control signal to generate a positive acceleration signal; a negative differential signal acceleration unit is used to perform negative acceleration on the target wind pressure control signal to generate a negative acceleration signal; an output adder is used to perform an addition operation on the positive acceleration signal and the negative acceleration signal to generate a two-way acceleration signal. The two-way differential accelerator of the present application uses a positive differential signal acceleration unit and a negative differential signal acceleration unit to achieve two-way acceleration of the wind pressure control signal, so as to shorten the output time of the wind pressure control signal and effectively suppress the wind pressure deviation problem. At the same time, by applying this two-way differential accelerator to the primary wind pressure control system, the primary wind pressure deviation can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of process control of thermal power units, and particularly to a bidirectional acceleration method for a wind pressure control signal and a primary air pressure control system. Background Art

[0002] The primary air pressure control system of a coal-fired thermal power unit is used to control the air duct pressure so that the air duct pressure remains at a given value. However, there is a problem of relatively large deviation in the current primary air pressure control system, that is, the deviation between the primary air pressure value and the given value of the primary air pressure is relatively large, resulting in adverse phenomena such as flameout of the burner due to high air pressure, blockage of the pipe due to too low air pressure and too small air volume, and burning out of the burner.

[0003] Currently, the air duct pressure control mainly uses an Engineering Fastest Integrator (EFI). Applying the EFI to the primary air pressure control system, but the EFI itself cannot maximize the reduction of the primary air pressure deviation, so an effective auxiliary method for primary air pressure control is needed. Summary of the Invention

[0004] This application provides a bidirectional acceleration method for a wind pressure control signal and a primary air pressure control system to solve the technical problem that the current primary air pressure control system cannot maximize the reduction of the primary air pressure deviation.

[0005] To solve the above technical problem, in a first aspect, this application provides a bidirectional acceleration method for a wind pressure control signal, which is applied to a bidirectional differentiator. The bidirectional differentiator includes an input differentiator, a positive differential signal acceleration unit, a negative differential signal acceleration unit, and an output adder. The method includes:

[0006] Using the input differentiator to perform signal conversion on the wind pressure control signal to obtain a target wind pressure control signal;

[0007] Using the positive differential signal acceleration unit to perform positive acceleration on the target wind pressure control signal to generate a positive acceleration signal;

[0008] Using the negative differential signal acceleration unit to perform negative acceleration on the target wind pressure control signal to generate a negative acceleration signal;

[0009] Using the output adder to perform an addition operation on the positive acceleration signal and the negative acceleration signal to generate a bidirectional acceleration signal.

[0010] Preferably, the step of using the input differentiator to perform signal conversion on the wind pressure control signal to obtain a target wind pressure control signal includes:

[0011] Using the input differentiator, convert the rising trend in the air pressure control signal into a positive deviation signal, and convert the falling trend in the air pressure control signal into a negative deviation signal. The positive deviation signal and the negative deviation signal form the target air pressure control signal.

[0012] Preferably, the positive differential signal acceleration unit includes a first positive feedback accelerator, a first differentiator, a positive output controller, and a first adder. The first positive feedback accelerator is used for signal acceleration. The input end of the first positive feedback accelerator is connected to the output end of the input differentiator, and the output end of the first positive feedback accelerator is connected to the input end of the first differentiator.

[0013] The output end of the first differentiator is connected to the input end of the positive output controller. The input ends of the first adder are respectively connected to the output end of the input differentiator and the output end of the positive output controller. The output end of the first adder is connected to the input end of the output adder. The first adder is used to output the positive acceleration signal.

[0014] Preferably, the first adder is:

[0015] AA(t) = IND(t) + FOC(t);

[0016] Where AA(t) is the output signal of the first adder, IND(t) is the output signal of the input differentiator, and FOC(t) is the output signal of the positive output controller.

[0017] Preferably, the negative differential signal acceleration unit includes a second positive feedback accelerator, a second differentiator, a negative output controller, and a second adder. The second positive feedback accelerator is used for signal acceleration. The input end of the second positive feedback accelerator is connected to the output end of the input differentiator, and the output end of the second positive feedback accelerator is connected to the input end of the second differentiator.

[0018] The output end of the second differentiator is connected to the input end of the negative output controller. The input ends of the second adder are respectively connected to the output end of the input differentiator and the output end of the negative output controller. The output end of the second adder is connected to the input end of the output adder. The second adder is used to output the negative acceleration signal.

[0019] Preferably, the second adder is:

[0020] AB(t) = IND(t) + NOC(t);

[0021] Among them, AB(t) is the output signal of the second adder, IND(t) is the output signal of the input differentiator, and NOC(t) is the output signal of the negative output controller.

[0022] Preferably, the output adder is:

[0023] OUTA(t) = AA(t) + AB(t);

[0024] Among them, OUTA(t) is the output signal of the output adder, AA(t) is the output signal of the first adder, and AB(t) is the output signal of the second adder.

[0025] In a second aspect, the present application further provides a primary air pressure control system, including a controller, and the controller includes a cascade proportional controller, an engineering fastest integrator, a negative proportional link, and the bidirectional differential accelerator described in the first aspect;

[0026] The input end of the cascade proportional controller is used to receive a wind pressure control signal, and the wind pressure control signal is a deviation signal between the primary air pressure signal and the primary air pressure set signal of the primary air pressure control system. The output end of the cascade proportional controller is respectively connected to the input end of the engineering fastest integrator and the input end of the bidirectional differential accelerator. The input end of the negative proportional link is respectively connected to the output end of the engineering fastest integrator and the input end of the bidirectional differential accelerator;

[0027] The controller is:

[0028] C(s) = K cpc [EFI(s) + DDSA(s)];

[0029] Among them, C(s) is the transfer function of the controller, EFI(s) is the transfer function of the engineering fastest integrator, DDSA(s) is the transfer function of the bidirectional differential accelerator, and K cpc is the gain of the cascade proportional controller.

[0030] Preferably, the transfer function of the engineering fastest integrator is:

[0031]

[0032] Among them, EFI(s) is the transfer function of the engineering fastest integrator, s is the Laplace operator, n is the order of the engineering fastest integrator, and T EFI is the time constant of the engineering fastest integrator.

[0033] Preferably, the transfer function of the bidirectional differential accelerator is:

[0034]

[0035] Among them, T IND is the differential time constant of the input differentiator, s is the Laplace operator, IA(t) is the output signal of the first integral accelerator in the first positive feedback accelerator, T IA is the integral time constant of the first integral accelerator, T DA is the differential time constant of the first differentiator, K DA is the differential gain of the first differentiator, ID(t) is the output signal of the second integral accelerator in the second positive feedback accelerator, T IB is the integral time constant of the second integral accelerator, T DB is the differential time constant of the second differentiator, K DB is the differential gain of the second differentiator.

[0036] Compared with the prior art, the present application has at least the following beneficial effects:

[0037] By using the input differentiator, the wind pressure control signal is converted to obtain a target wind pressure control signal; by using the positive differential signal acceleration unit, the target wind pressure control signal is positively accelerated to generate a positive acceleration signal; by using the negative differential signal acceleration unit, the target wind pressure control signal is negatively accelerated to generate a negative acceleration signal; by using the output adder, an addition operation is performed on the positive acceleration signal and the negative acceleration signal to generate a bidirectional acceleration signal. The bidirectional differentiator of the present application converts the wind pressure control signal in the control process into a differential signal through the input differentiator, and then uses the positive differential signal acceleration unit and the negative differential signal acceleration unit to achieve bidirectional acceleration of the wind pressure control signal, so as to shorten the output time of the wind pressure control signal and effectively suppress the wind pressure deviation problem. At the same time, the bidirectional differentiator is used to construct the primary wind pressure control system of the thermal power unit, reduce the primary wind pressure deviation, and finally enhance the control effect.

[0038] In addition, the present application performs conditional limiting on the output of the integral accelerator through an integral limiter, and cooperates with the input differentiator and bidirectional acceleration to solve the problem of the lack of auxiliary suppression technology for the wind pressure deviation problem, effectively suppress the bidirectional overpressure problem in the wind pressure control process of the primary wind pressure control system of the thermal power unit, reduce the wind pressure deviation of the air duct, and thus improve the wind pressure control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic flow chart of the bidirectional acceleration method of the wind pressure control signal shown in the embodiment of the present application;

[0040] Figure 2 is a schematic structural diagram of the bidirectional differentiator shown in an embodiment of the present application;

[0041] Figure 3 Schematic structural diagram of a bidirectional differential accelerator shown in another embodiment of the present application;

[0042] Figure 4 Schematic diagram of the signal flow of a bidirectional differential accelerator shown in an embodiment of the present application;

[0043] Figure 5 Schematic diagram of the extraction result of a bidirectional differential accelerator shown in an embodiment of the present application;

[0044] Figure 6 Schematic structural diagram of a primary air pressure control system shown in an embodiment of the present application;

[0045] Figure 7 Schematic diagram of the control result of a primary air pressure control system shown in an embodiment of the present application. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0047] It should be understood that the step numbers used in the text are only for convenient description and do not limit the execution order of the steps.

[0048] It should be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of the present application and the appended claims, unless otherwise clearly specified in the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0049] The terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0050] The term "and / or" refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0051] Any process or method description described in this application can be understood to represent a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of this application includes additional implementations, where functions can be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the technical field to which the embodiments of this application belong.

[0052] The logic and / or steps described in this application, for example, can be considered as a sequenced list of executable instructions for implementing a logical function, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

[0053] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a two-way acceleration method for a wind pressure control signal provided by an embodiment of this application. The two-way acceleration method for the wind pressure control signal in the embodiment of this application can be applied to a two-way differential accelerator, and the two-way differential accelerator can be integrated into a computer device, which includes but is not limited to devices such as smart phones, laptop computers, tablet computers, desktop computers, physical servers, and cloud servers.

[0054] Optionally, as Figure 2 shown in the structural schematic diagram of the two-way differential accelerator. The two-way differential accelerator (Double differential signal accelerator, DDSA) includes an input differentiator 21, a positive differential signal acceleration unit 22, a negative differential signal acceleration unit 23, and an output adder 24.

[0055] As Figure 1 shown, the method of this embodiment includes steps S101 to S104, which are described in detail as follows:

[0056] Step S101, use the input differentiator to perform signal conversion on the wind pressure control signal to obtain a target wind pressure control signal.

[0057] In this step, the wind pressure control signal is a process signal, and the input differentiator converts the wind pressure control signal into a differential signal, that is, the target wind pressure control signal. Optionally, the wind pressure control signal is the deviation signal between the primary wind pressure signal and the primary wind pressure setpoint signal of the primary wind pressure control system, so as to suppress the two-way overpressure problem in the wind pressure control process of the primary wind pressure control system and improve the wind pressure control effect of the primary wind pressure control system.

[0058] In some embodiments, step S101 includes:

[0059] Using the input differentiator, convert the rising trend in the wind pressure control signal into a positive deviation signal, and convert the falling trend in the wind pressure control signal into a negative deviation signal. The positive deviation signal and the negative deviation signal constitute the target wind pressure control signal.

[0060] In this embodiment, for two-way signal acceleration, when the input differentiator converts the wind pressure control signal into a differential signal, it converts the rising trend of the wind pressure control signal into a positive deviation signal, that is, the output signal of the input differentiator is positive, and converts the falling trend of the wind pressure control signal into a negative deviation signal, that is, the output signal of the input differentiator is negative. Input the positive deviation signal into the positive differential signal acceleration unit for positive acceleration, and input the negative deviation signal into the negative differential signal acceleration unit for negative acceleration.

[0061] Optionally, the functional expression of the input differentiator when performing signal conversion on the wind pressure control signal is:

[0062]

[0063] where IND(s) is the transfer function of the input differentiator, T IND is the differential time constant, and s is the Laplace operator.

[0064] Step S102, use the positive differential signal acceleration unit to perform positive acceleration on the target wind pressure control signal to generate a positive acceleration signal.

[0065] In this step, the positive differential signal acceleration unit accelerates the positive deviation signal output by the input differentiator to generate a positive acceleration signal.

[0066] In some embodiments, such as Figure 3As shown, the forward differential signal acceleration unit 22 includes a first positive feedback accelerator 221, a first differentiator 222, a forward output controller 223, and a first adder 224. The first positive feedback accelerator 221 is used for signal acceleration. The input end of the first positive feedback accelerator 221 is connected to the output end of the input differentiator 21, and the output end of the first positive feedback accelerator 221 is connected to the input end of the first differentiator 222;

[0067] The output end of the first differentiator 222 is connected to the input end of the forward output controller 223. The input ends of the first adder 224 are respectively connected to the output end of the input differentiator 21 and the output end of the forward output controller 223. The output end of the first adder 224 is connected to the input end of the output adder 24. The first adder 224 is used to output the forward acceleration signal.

[0068] In this embodiment, the first positive feedback accelerator 221 includes a first positive feedback link 2211, a first integral accelerator 2212, and a second integral limiter 2213. The positive feedback link 2211 is used to control the first integral accelerator 2212 to perform acceleration. The first integral accelerator 2212 is used to perform forward acceleration on the target air pressure control signal. The first integral limiter 2213 is used to limit the output signal of the first integral accelerator 2212.

[0069] Among them, the output end of the positive feedback link 2211 is connected to the input ends of the first differentiator 222 and the first integral accelerator 2212 to input the target air pressure control signal into the first integral accelerator 2212 for acceleration. The first integral accelerator 2212 outputs the accelerated signal to the positive feedback link 2211. When the positive feedback link 2211 confirms that the process signal acceleration is completed, the signal accelerated by the first integral accelerator 2212 is output to the first differentiator 222.

[0070] Among them, the first integral accelerator 2212 is connected to the first integral limiter 2213 to directly limit the signal output by the first integral accelerator 2212 when the first integral accelerator 2212 accelerates the process signal.

[0071] As Figure 3As shown, the target air pressure control signal output by the input differentiator is input into the positive feedback loop, and the positive feedback loop controls the first integral accelerator to accelerate. Among them, the positive signal in the target air pressure control signal is limited by the first integral limiter, so that the first integral accelerator accelerates the positive signal. The acceleration signal output by the first integral accelerator is conditionally limited by the first integral limiter and fed back to the positive feedback loop. When the positive feedback loop confirms that the acceleration process of the first integral accelerator ends, the acceleration signal is input into the first differentiator to extract the differential signal in the acceleration signal by using the first differentiator, and the first differential output signal is obtained; finally, the first differential output signal is input into the positive output controller to extract the target positive signal in the first differential output signal, realizing positive acceleration.

[0072] In some embodiments, the first integral accelerator is:

[0073]

[0074] The first integral limiter is:

[0075]

[0076] Among them, IA(s) is the transfer function of the first integral accelerator, s is the Laplace operator, T IA is the integral time constant of the first integral accelerator, IA(t) is the output signal of the first integral accelerator, and IND(t) is the output signal of the input differentiator.

[0077] The first differentiator is:

[0078]

[0079] Among them, DA(s) is the transfer function of the first differentiator, s is the Laplace operator, T DA is the differential time constant of the first differentiator, K DA is the differential gain of the first differentiator;

[0080] The positive output controller is:

[0081]

[0082] Among them, FOC(t) is the output signal of the positive output controller, and DA(t) is the output signal of the first differentiator.

[0083] Optionally, the first adder is:

[0084] AA(t) = IND(t) + FOC(t);

[0085] Wherein, AA(t) is the output signal of the first adder, IND(t) is the output signal of the input differentiator, and FOC(t) is the output signal of the positive output controller.

[0086] Step S103: Use the negative differential signal acceleration unit to perform negative acceleration on the target wind pressure control signal to generate a negative acceleration signal.

[0087] In this step, the negative differential signal acceleration unit accelerates the negative deviation signal output by the input differentiator to generate a negative acceleration signal.

[0088] In some embodiments, as Figure 3 shown, the negative differential signal acceleration unit 23 includes a second positive feedback accelerator 231, a second differentiator 232, a negative output controller 233, and a second adder 234. The second positive feedback accelerator 231 is used for signal acceleration. The input end of the second positive feedback accelerator 231 is connected to the output end of the input differentiator 21, and the output end of the second positive feedback accelerator 231 is connected to the input end of the second differentiator 232;

[0089] The output end of the second differentiator 232 is connected to the input end of the negative output controller 233. The input ends of the second adder 234 are respectively connected to the output end of the input differentiator 21 and the output end of the negative output controller 233. The output end of the second adder 234 is connected to the input end of the output adder 24. The second adder 234 is used to output the negative acceleration signal.

[0090] In this embodiment, the second positive feedback accelerator 231 includes a second positive feedback link 2311, a second integral accelerator 2312, and a second integral limiter 2313. The positive feedback link 2311 is used to control the second integral accelerator 2312 to perform acceleration. The second integral accelerator 2312 is used to perform negative acceleration on the target wind pressure control signal. The second integral limiter 2313 is used to limit the output signal of the second integral accelerator 2312.

[0091] Wherein, the output end of the positive feedback link 2311 is connected to the input end of the second differentiator 232 and the input end of the second integral accelerator 2312 to input the target wind pressure control signal into the second integral accelerator 2312 for acceleration. The second integral accelerator 2312 outputs the accelerated signal to the positive feedback link 2311. When the positive feedback link 2311 confirms that the process signal acceleration is completed, the signal accelerated by the second integral accelerator 2312 is output to the second differentiator 232.

[0092] Among them, the second integral accelerator 2312 is connected to the second integral limiter 2313 to directly limit the signal output by the second integral accelerator 2312 when the second integral accelerator 2312 accelerates the process signal.

[0093] As Figure 3 shown, the target wind pressure control signal output by the input differentiator is input to the positive feedback loop, and the positive feedback loop controls the second integral accelerator to accelerate. Among them, the negative signal in the target wind pressure control signal is limited by the second integral limiter, so that the second integral accelerator accelerates the negative signal. The acceleration signal output by the second integral accelerator is conditionally limited by the second integral limiter and fed back to the positive feedback loop. When the positive feedback loop confirms that the acceleration process of the second integral accelerator is over, the acceleration signal is input to the second differentiator to extract the differential signal in the acceleration signal by using the second differentiator to obtain the second differential output signal; finally, the second differential output signal is input to the negative output controller to extract the target negative signal in the second differential output signal to achieve negative acceleration.

[0094] In some embodiments, the second integral accelerator is:

[0095]

[0096] The second integral limiter is:

[0097]

[0098] Among them, IB(s) is the transfer function of the second integral accelerator, s is the Laplace operator, T IB is the integral time constant of the second integral accelerator, IB(t) is the output signal of the second integral accelerator, and IND(t) is the output signal of the input differentiator.

[0099] The second differentiator is:

[0100]

[0101] Among them, DB(s) is the transfer function of the second differentiator, s is the Laplace operator, T DB is the differential time constant of the second differentiator, K DB is the differential gain of the second differentiator;

[0102] The negative output controller is:

[0103]

[0104] Among them, NOC(t) is the output signal of the negative output controller, and DB(t) is the output signal of the second differentiator.

[0105] Optionally, the second adder is:

[0106] AB(t) = IND(t) + NOC(t);

[0107] Among them, AB(t) is the output signal of the second adder, IND(t) is the output signal of the input differentiator, and NOC(t) is the output signal of the negative output controller.

[0108] Step S104: Use the output adder to perform an addition operation on the positive acceleration signal and the negative acceleration signal to generate a bidirectional acceleration signal.

[0109] In this step, the positive acceleration signal corresponding to the rising trend in the wind pressure control signal and the negative acceleration signal corresponding to the falling trend in the wind pressure control signal are signal - synthesized through the output adder to generate a complete bidirectional acceleration signal, realizing the acceleration of the process signal, so that the control system can observe the process signal in advance to enable signal control in advance.

[0110] Optionally, the output adder is:

[0111] OUTA(t) = AA(t) + AB(t);

[0112] Among them, OUTA(t) is the output signal of the output adder, AA(t) is the output signal of the first adder, and AB(t) is the output signal of the second adder.

[0113] By way of example and not limitation, Figure 4 shows a schematic diagram of the signal flow of the bidirectional differential accelerator. As Figure 4 shown, using DDSA, the bidirectional differential signals of a fifth - order inertia process (FOIP) for a unit - step input signal are accelerated and observed. Among them, the fifth - order inertia process FOIP is:

[0114]

[0115] Among them, FOIP(s) is the transfer function of the fifth - order inertia process FOIP, and T FOIP is the FOIP time constant, with the unit of s.

[0116] At T IND = 100s, T IA = T IB = 100s, T DA = TDB = 100 s, K DA = K DB = 4, T FOIP = 100 s, the FOIP input is a unit step signal, and the process bidirectional differential acceleration observation result is obtained, as Figure 5 shown. At the moment of t = 0 s, the unit step input signal is the wind pressure control signal. At the moment of t = 1200 s, the wind pressure control signal has a unit negative step change. PV FOIP (t) is the process output signal of the 5th-order inertial process FOIP under the unit step input, PV IND (t) is the output signal of the input differentiator, PV DDSA (t) is the output signal of the bidirectional differential accelerator. It can be seen that the DDSA output signal significantly leads the output signal of the input differentiator.

[0117] Please refer to Figure 6 , this application also provides a structural schematic diagram of the primary air pressure control system. As Figure 6 shown, the system includes a controller (Controller, C) and a control process (Controller Process, CP). The controller includes a cascade proportional controller (Cascade proportional controller, CPC), an engineering fastest integrator (Engineeringfastest integrator, EFI), a negative proportional link (-1), and as Figure 2 or Figure 3 shown bidirectional differential accelerator DDSA;

[0118] The input end of the cascade proportional controller is used to receive the wind pressure control signal. The wind pressure control signal is the deviation signal between the primary air pressure signal and the primary air pressure set signal of the primary air pressure control system. The output end of the cascade proportional controller is respectively connected to the input end of the engineering fastest integrator and the input end of the bidirectional differential accelerator. The input end of the negative proportional link is respectively connected to the output end of the engineering fastest integrator and the input end of the bidirectional differential accelerator;

[0119] The controller is:

[0120] C(s) = K cpc [EFI(s) + DDSA(s)];

[0121] Among them, C(s) is the transfer function of the controller, EFI(s) is the transfer function of the engineering fastest integrator, DDSA(s) is the transfer function of the bidirectional differential accelerator, and K cpc is the gain of the cascade proportional controller.

[0122] Optionally, the transfer function of the engineering fastest integrator is:

[0123]

[0124] where EFI(s) is the transfer function of the engineering fastest integrator, s is the Laplace operator, n is the order of the engineering fastest integrator, and T eFI is the time constant of the working fastest integrator.

[0125] Optionally, the transfer function of the bidirectional differential accelerator is:

[0126]

[0127] where T IND is the differential time constant of the input differentiator, s is the Laplace operator, IA(t) is the output signal of the first integrator accelerator in the first positive feedback accelerator, and T IA is the integration time constant of the first integrator accelerator, T DA is the differential time constant of the first differentiator, K DA is the differential gain of the first differentiator, IB(t) is the output signal of the second integrator accelerator in the second positive feedback accelerator, and T IB is the integration time constant of the second integrator accelerator, T DB is the differential time constant of the second differentiator, and K DB is the differential gain of the second differentiator.

[0128] As an example rather than a limitation, the controller C is applied to the primary air pressure control system of a 600MW supercritical thermal power unit in a power plant, and the control results are obtained as Figure 7 shown. The bidirectional differential accelerator DDSA is added after 10:00. Before adding DDSA, the maximum deviation of the primary air duct pressure in the primary air pressure control system is 0.33 kP a / - 0.25 kP a relative to the given value of the primary air duct pressure. After adding DDSA, the maximum deviation of the primary air duct pressure is 0.2 kPa / - 0.16 kPa. It can be seen that DDSA has a good effect on suppressing the deviation of the primary air pressure.

[0129] In several embodiments provided by the present application, it can be understood that each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, the program segment, or the part of code includes one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in an order different from that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved.

[0130] If the described functions are implemented in the form of software function modules 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 the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a terminal device to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs, Read-Only Memories), random access memories (RAMs, Random Access Memories), magnetic disks, or optical discs that can store program codes.

[0131] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present application. It should be understood that the above description is only for the specific embodiments of the present application and is not used to limit the protection scope of the present application. It is particularly pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A two-way acceleration method for a wind pressure control signal, characterized in that, Applied to a bidirectional differential accelerator, the bidirectional differential accelerator includes an input differentiator, a positive differential signal acceleration unit, a negative differential signal acceleration unit, and an output adder. The method includes: Using the input differentiator to perform signal conversion on the wind pressure control signal to obtain a target wind pressure control signal; Using the positive differential signal acceleration unit to perform positive acceleration on the target wind pressure control signal to generate a positive acceleration signal. The positive differential signal acceleration unit includes a first positive feedback accelerator, a first differentiator, a positive output controller, and a first adder. The first positive feedback accelerator is used for signal acceleration. The input end of the first positive feedback accelerator is connected to the output end of the input differentiator, and the output end of the first positive feedback accelerator is connected to the input end of the first differentiator; the output end of the first differentiator is connected to the input end of the positive output controller, the input ends of the first adder are respectively connected to the output end of the input differentiator and the output end of the positive output controller, the output end of the first adder is connected to the input end of the output adder, and the first adder is used to output the positive acceleration signal; Using the negative differential signal acceleration unit to perform negative acceleration on the target wind pressure control signal to generate a negative acceleration signal. The negative differential signal acceleration unit includes a second positive feedback accelerator, a second differentiator, a negative output controller, and a second adder. The second positive feedback accelerator is used for signal acceleration. The input end of the second positive feedback accelerator is connected to the output end of the input differentiator, and the output end of the second positive feedback accelerator is connected to the input end of the second differentiator; the output end of the second differentiator is connected to the input end of the negative output controller, the input ends of the second adder are respectively connected to the output end of the input differentiator and the output end of the negative output controller, the output end of the second adder is connected to the input end of the output adder, and the second adder is used to output the negative acceleration signal; Using the output adder to perform an addition operation on the positive acceleration signal and the negative acceleration signal to generate a bidirectional acceleration signal.

2. The two-way acceleration method for the wind pressure control signal according to claim 1, wherein The step of using the input differentiator to perform signal conversion on the wind pressure control signal to obtain a target wind pressure control signal includes: Using the input differentiator to convert the rising trend in the wind pressure control signal into a positive deviation signal, and convert the falling trend in the wind pressure control signal into a negative deviation signal. The positive deviation signal and the negative deviation signal form the target wind pressure control signal.

3. The bidirectional acceleration method for the air pressure control signal as described in claim 1, wherein The first adder is: AA(t) = IND(t) + FOC(t); where AA(t) is the output signal of the first adder, IND(t) is the output signal of the input differentiator, and FOC(t) is the output signal of the positive output controller.

4. The two-way acceleration method of the air pressure control signal according to claim 1, characterized in that, The second adder is: AB(t) = IND(t) + NOC(t); Wherein, AB(t) is the output signal of the second adder, IND(t) is the output signal of the input differentiator, and NOC(t) is the output signal of the negative output controller.

5. The bidirectional acceleration method of the air pressure control signal according to claim 1, wherein, The output adder is: OUTA(t) = AA(t) + AB(t); Wherein, OUTA(t) is the output signal of the output adder, AA(t) is the output signal of the first adder, and AB(t) is the output signal of the second adder.

6. A primary air pressure control system, characterized in that, It includes a controller, and the controller includes a cascade proportional controller, an engineering fastest integrator, a negative proportional link, and a bidirectional differential accelerator as described in any one of claims 1 to 5; The input end of the cascade proportional controller is used to receive a wind pressure control signal, the wind pressure control signal is a deviation signal between the primary wind pressure signal of the primary wind pressure control system and the primary wind pressure set signal, the output end of the cascade proportional controller is respectively connected to the input end of the engineering fastest integrator and the input end of the bidirectional differential accelerator, and the input end of the negative proportional link is respectively connected to the output end of the engineering fastest integrator and the input end of the bidirectional differential accelerator; The controller is: C(s) = K cpc [EFI(s) + DDSA(s)]; Among them, C(s) is the transfer function of the controller, EFI(s) is the transfer function of the engineering fastest integrator, DDSA(s) is the transfer function of the bidirectional differential accelerator, and K cpc is the gain of the cascade proportional controller.

7. The primary air pressure control system according to claim 6, wherein The transfer function of the engineering fastest integrator is: Among them, EFI(s) is the transfer function of the engineering fastest integrator, s is the Laplace operator, n is the order of the engineering fastest integrator, and T EFI is the time constant of the working fastest integrator.

8. The primary air pressure control system according to claim 6, wherein The transfer function of the bidirectional differential accelerator is: Among them, T IND is the differential time constant of the input differentiator, s is the Laplace operator, IA(t) is the output signal of the first integrator in the first positive feedback accelerator, T IA is the integration time constant of the first integrator, T DA is the differential time constant of the first differentiator, K DA is the differential gain of the first differentiator, IB(t) is the output signal of the second integrator in the second positive feedback accelerator, T IB is the integration time constant of the second integrator, T DB is the differential time constant of the second differentiator, K DB is the differential gain of the second differentiator, and IND(t) is the output signal of the input differentiator.

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