A variable speed method and system for the fastest tracking differentiation

Abstract

The application discloses a speed-adjustable fastest tracking differential method and system, a first subtracter is used to perform subtraction operation on an input signal and a second integral signal output by a second integrator to obtain a feedback output signal; a first integrator is used to perform integral operation on the feedback output signal to obtain a first integral signal; a second integrator is used to perform integral operation on the first integral signal to obtain the second integral signal; a first proportional control module is used to process the first integral signal to obtain an adjustable proportional control signal; a second proportional control module is used to process the second integral signal to obtain a fixed proportional control signal; a second subtracter is used to perform subtraction operation on the adjustable proportional control signal and the fixed proportional control signal to obtain a difference signal; and a third adder is used to perform addition operation on the input signal and the difference signal to obtain a speed-adjustable fastest tracking differential signal. The application provides a speed-adjustable fastest tracking differential method and system, realizes fastest tracking differentiation, improves the tracking differentiation performance of a differentiator, adjusts the speed of tracking input differentiation through the output of the differentiator, realizes differential tracking in different situations, and meets different needs in a control process.

Description

Technical Field

[0001] This invention relates to the field of industrial process control, and in particular to a speed-adjustable fastest tracking differential method and system. Background Technology

[0002] In the field of industrial process control, high-frequency noise interference is common in process signals. Low-pass filters (LPFs) are often used to filter out high-frequency noise interference. Among them, the first-order inertial filter (FOIF) is a widely used and basic LPF. FOIF is a typical exponential tracking filtering mechanism, but it has the main problem of low output tracking efficiency.

[0003] In industrial process control, acquiring the differential signal of the process response has important applications, such as providing differential control signals in control loops. An ideal differentiator is physically impossible to realize; therefore, a common differentiator is typically used. This common differentiator is a tracking differentiator based on FOIF (Focusing On-Film Interchange) construction. Consequently, the common differentiator also suffers from the problem of low efficiency due to the output tracking the input differentiation.

[0004] In addition, in actual control processes, such as the control process of thermal power units, there are low-order easily controllable processes and high-order difficult-to-control processes. In order to meet the different needs of actual control processes, it is required that the efficiency of the differentiator output tracking the input differential be adjustable. For example, for low-order easily controllable processes, it is required to reduce the efficiency of the differentiator output tracking the input differential, while for high-order difficult-to-control processes, it is required to increase the efficiency of the differentiator output tracking the input differential. Summary of the Invention

[0005] This invention provides a speed-adjustable fastest tracking differential method and system, which achieves fastest tracking differential, improves the tracking differential performance of the differentiator, and enables differential tracking under different conditions by adjusting the rate at which the output of the differentiator tracks the input differential, thus meeting different needs of the control process.

[0006] To address the aforementioned problems, one embodiment of the present invention provides a speed-adjustable steepest tracking differential method, applied to a speed-adjustable steepest tracking differentiator. The speed-adjustable steepest tracking differentiator includes: a first subtractor, a first integrator, a second integrator, a first proportional control module, a second proportional control module, a second subtractor, and a third adder; the method includes:

[0007] Using the first subtractor, the input signal and the second integral signal output by the second integrator are subtracted to obtain the feedback output signal corresponding to the input signal;

[0008] Using the first integrator, the feedback output signal is integrated to obtain the first integrated signal corresponding to the feedback output signal;

[0009] Using the second integrator, the first integral signal is integrated to obtain the second integral signal corresponding to the first integral signal;

[0010] Using the first proportional control module, the first integral signal is received, and an adjustable proportional control signal corresponding to the first integral signal is generated.

[0011] Using the second proportional control module, the second integral signal is received, and a fixed proportional control signal corresponding to the second integral signal is generated.

[0012] Using the second subtractor, the adjustable ratio control signal is received at the minuend and the fixed ratio control signal is received at the subtractor. The difference signal is obtained through subtraction.

[0013] Using the third adder, the input signal and the difference signal are received, and the speed-adjustable fastest tracking differential signal is obtained through addition.

[0014] As an improvement to the above solution, the first proportional control module includes: a first delay unit, a first adder, and an adjustable proportional controller; the step of using the first proportional control module to receive the first integral signal and generate an adjustable proportional control signal corresponding to the first integral signal includes:

[0015] Using the first delay unit, the first integral signal is received, and a first integral delay signal is generated;

[0016] Using the first adder, the first integral delay signal and the first integral signal are received, and the first integral delay signal and the first integral signal are added together to obtain the first superimposed signal;

[0017] Using the adjustable proportional controller, the first superimposed signal is received, and an adjustable proportional control signal is obtained based on the first superimposed signal and a preset first control ratio threshold.

[0018] As an improvement to the above solution, the second proportional control module includes: a second delay unit, a second adder, and a fixed proportional controller; the step of using the second proportional control module to receive the second integral signal and generate a fixed proportional control signal corresponding to the second integral signal includes:

[0019] Using the second delay unit, the second integral signal is received, and a second integral delay signal is generated;

[0020] Using the second adder, the second integral delay signal and the second integral signal are received, and the second integral delay signal and the second integral signal are added together to obtain the second superimposed signal;

[0021] Using the fixed ratio controller, the second superimposed signal is received, and a fixed ratio control signal is obtained based on the second superimposed signal and a preset second control ratio threshold.

[0022] As an improvement to the above scheme, the first integrator includes:

[0023]

[0024] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T T is the integration time constant, in seconds.

[0025] As an improvement to the above scheme, the second integrator includes:

[0026]

[0027] In the formula, f SI (s) is the Laplace transfer function of the second integrator; T T is the integration time constant, in seconds.

[0028] As an improvement to the above solution, the first proportional control module includes:

[0029]

[0030] In the formula, f FA (s) is the Laplace transfer function output by the first proportional control module; T T T is the integration time constant, in seconds; L:A K is the delay time constant of the first delay unit, in seconds; P K is the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units. P =K.

[0031] As an improvement to the above solution, the second proportional control module includes:

[0032]

[0033] In the formula, f FPC (s) is the Laplace transfer function output by the first proportional control module; T T T is the integration time constant, in seconds; L:Bis the delay time constant of the first delay unit, in seconds.

[0034] Accordingly, one embodiment of the present invention also provides a speed-adjustable fastest tracking differential system, including: a data acquisition device and a speed-adjustable fastest tracking differential; wherein, the speed-adjustable fastest tracking differential applies the speed-adjustable fastest tracking differential method as described in the present invention;

[0035] The data acquisition device is used to acquire process signals generated by the thermal power unit and generate input signals;

[0036] The speed-adjustable fastest tracking differentiator is used to receive the input signal and generate a speed-adjustable fastest tracking differential signal corresponding to the input signal.

[0037] As an improvement to the above scheme, the process signal is the primary steam temperature process signal of the thermal power unit control process.

[0038] As an improvement to the above scheme, the expression for the speed-adjustable fastest tracking differentiator is:

[0039] f ASFTD (S)=1-f FPC (S)+f FA (S)

[0040]

[0041]

[0042]

[0043] In the formula, f ASFTD (s) is the Laplace transfer function of the speed-adjustable fastest tracking differentiator; f FPC (s) is the Laplace transfer function output by the 0.5 fixed proportional controller; f FA (s) is the Laplace transfer function output by the first adder; T T T is the integration time constant, in seconds; L:A T L:B K represents the delay time constants of the first delay unit and the second delay unit, respectively, in seconds; P K represents the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units.

[0044] As can be seen from the above, the present invention has the following beneficial effects:

[0045] This invention provides a speed-adjustable fastest tracking differential method. It utilizes a first subtractor to subtract the input signal from the second integral signal output by a second integrator to obtain a feedback output signal; the first integrator then integrates the feedback output signal to obtain a first integral signal; a second integrator integrates the first integral signal to obtain a second integral signal; a first proportional control module processes the first integral signal to obtain an adjustable proportional control signal; a second proportional control module processes the second integral signal to obtain a fixed proportional control signal; a second subtractor uses the adjustable proportional control signal as the minuend and the fixed proportional control signal as the subtrahend to obtain a difference signal; and a third adder adds the input signal and the difference signal to obtain the speed-adjustable fastest tracking differential signal. This invention outputs a first integral signal as an adjustable proportional control signal through a first proportional control module and a second integral signal as a fixed proportional control signal through a second proportional control module. By superimposing the input signal with the difference between the adjustable and fixed proportional control signals, the differential rate can be changed based on the adjustable proportional control signal output by the first control module. This allows the differentiator to adjust its tracking efficiency to different levels and adjust its tracking performance to correspond to the control performance at different times, thereby improving the tracking and differential performance of the differentiator. Attached Figure Description

[0046] Figure 1 This is a schematic flowchart of a speed-adjustable fastest tracking differential method provided in an embodiment of the present invention;

[0047] Figure 2 This is a schematic diagram of the structure of a speed-adjustable fastest tracking differentiator provided in an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the structure of a speed-adjustable fastest tracking differential system provided in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the output result of the first adder provided in an embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram of the output result of the second adder provided in an embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of the output result of the second proportional control module provided in an embodiment of the present invention;

[0052] Figure 7 This is a schematic diagram comparing the results of a commonly used differentiator and a speed-adjustable fastest tracking differentiator provided in an embodiment of the present invention.

[0053] Figure 8 This is a schematic diagram of a terminal device structure provided in an embodiment of the present invention. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Example 1

[0056] See Figure 1 , Figure 1 This is a flowchart illustrating a speed-adjustable steepest tracking differential method according to an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment includes steps 101 to 107, and the specific steps are as follows:

[0057] The method is applied to a speed-adjustable fastest tracking differentiator, which includes: a first subtractor 201, a first integrator 202, a second integrator 203, a first proportional control module 204, a second proportional control module 205, a second subtractor 206, and a third adder 207.

[0058] Step 101: Using the first subtractor, perform a subtraction operation on the input signal and the second integral signal output by the second integrator to obtain the feedback output signal corresponding to the input signal;

[0059] In this embodiment, the input terminals of the first subtractor include a minuend terminal and a subtrahend terminal; the minuend terminal is used to receive the input signal, and the subtrahend terminal is used to receive the second integration signal output by the second integrator.

[0060] Step 102: Using the first integrator, perform an integration operation on the feedback output signal to obtain the first integrated signal corresponding to the feedback output signal.

[0061] In this embodiment, the first integrator includes:

[0062]

[0063] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T T is the integration time constant, in seconds.

[0064] Step 103: Using the second integrator, perform integration on the first integral signal to obtain the second integral signal corresponding to the first integral signal.

[0065] In this embodiment, the second integrator includes:

[0066]

[0067] In the formula, f SI (s) is the Laplace transfer function of the second integrator; T T is the integration time constant, in seconds.

[0068] Step 104: Using the first proportional control module, receive the first integral signal and generate an adjustable proportional control signal corresponding to the first integral signal.

[0069] In this embodiment, the first proportional control module includes: a first delay unit 208, a first adder 209, and an adjustable proportional controller 210; the step of using the first proportional control module to receive the first integral signal and generate an adjustable proportional control signal corresponding to the first integral signal includes:

[0070] Using the first delay unit, the first integral signal is received, and a first integral delay signal is generated;

[0071] Using the first adder, the first integral delay signal and the first integral signal are received, and the first integral delay signal and the first integral signal are added together to obtain the first superimposed signal;

[0072] Using the adjustable proportional controller, the first superimposed signal is received, and an adjustable proportional control signal is obtained based on the first superimposed signal and a preset first control ratio threshold.

[0073] In one specific embodiment, the preset first control ratio threshold is adaptively adjusted according to the application scenario of the differentiator.

[0074] In this embodiment, the first proportional control module includes:

[0075]

[0076] In the formula, f FA (s) is the Laplace transfer function output by the first proportional control module; T T T is the integration time constant, in seconds; L:A K is the delay time constant of the first delay unit, in seconds; PK is the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units. P =K.

[0077] In this embodiment, the first delay unit includes:

[0078]

[0079] In the formula, f L:A (s) is the Laplace transfer function of the first delay; T F:A T is the delay time constant of the first delay unit, in seconds; preferably, T F:A =T T .

[0080] In one specific embodiment, in T T =T L:A =100s, obtain the output PV of the first adder. FA (t), such as Figure 4 As shown.

[0081] Step 105: Using the second proportional control module, receive the second integral signal and generate a fixed proportional control signal corresponding to the second integral signal.

[0082] In this embodiment, the second proportional control module includes: a second delay unit 211, a second adder 212, and a fixed proportional controller 213; the step of using the second proportional control module to receive the second integral signal and generate a fixed proportional control signal corresponding to the second integral signal includes:

[0083] Using the second delay unit, the second integral signal is received, and a second integral delay signal is generated;

[0084] Using the second adder, the second integral delay signal and the second integral signal are received, and the second integral delay signal and the second integral signal are added together to obtain the second superimposed signal;

[0085] Using the fixed ratio controller, the second superimposed signal is received, and a fixed ratio control signal is obtained based on the second superimposed signal and a preset second control ratio threshold.

[0086] In this embodiment, the second proportional control module includes:

[0087]

[0088] In the formula, f FPC (s) is the Laplace transfer function output by the first proportional control module; T TT is the integration time constant, in seconds; L:B is the delay time constant of the first delay unit, in seconds.

[0089] In this embodiment, the second delay includes:

[0090]

[0091] In the formula, f L:B (s) is the Laplace transfer function of the second delay; T F:B T is the delay time constant of the second delay unit, in seconds; preferably, T F:B =T T .

[0092] In one specific embodiment, the preset second control ratio threshold is 0.5.

[0093] In one specific embodiment, in T T =T L:A =T L:B =100s, K P =K=0.5 to obtain the output PV of the second adder SA (t), Figure 5 As shown.

[0094] In one specific embodiment, in T T =T L:B =100s, to obtain the aforementioned 0.5 fixed ratio control output PV FPC (t), Figure 6 As shown.

[0095] Step 106: Using the second subtractor, the adjustable ratio control signal is received at the minuend and the fixed ratio control signal is received at the subtractor. The difference signal is obtained through subtraction.

[0096] Step 107: Using the third adder, receive the input signal and the difference signal, and obtain the speed-adjustable fastest tracking differential signal through addition.

[0097] In a specific embodiment, the following example is given for better illustration:

[0098] With a gain of 1, the commonly used differentiator expression is:

[0099] f CD (s)=1-f FOIF (s)

[0100]

[0101] In the formula, f CD(s) is the Laplace transfer function of the commonly used differentiator; f FOIF (s) is the Laplace transfer function of the first-order inertial filter; T FOIF Let be the filtering time constant of the first-order inertial filter, in seconds;

[0102] Set T T =T L:A =T L:B =100s, T FOIF =100s, take K as 0.1, 0.3, 0.5 respectively, that is, K P When the input signal is a unit step, and the values ​​are 0.1, 0.3, and 0.5, the process output PV of the speed-adjustable fastest tracking differentiator is obtained. ASFTD (t), the commonly used differentiator process outputs PV CD (t), such as Figure 7 As shown.

[0103] Depend on Figure 7 It can be seen that when t>100s, the output of the speed-adjustable fastest tracking differentiator has tracked the input, while the output of a conventional differentiator tracks to 63% of the input. Similarly, when the differential output tracks to 63% of the input, the conventional differentiator requires 100s. Compared to the conventional differentiator, the speed-adjustable fastest tracking differentiator has a higher cutoff speed, improving the differential tracking efficiency, indicating that the differential performance of the speed-adjustable fastest tracking differentiator is superior to that of the conventional differentiator.

[0104] The speed-adjustable fastest tracking differentiator, at K... P It takes 62 seconds to get K to 0.1. P It takes 70 seconds to get 0.3, K P It takes 76 seconds to reach 0.5. This demonstrates that by changing the adjustable proportional control gain, the efficiency of the differential output tracking the input of the speed-adjustable fastest tracking differentiator can be altered. Similarly, to meet the needs of different differential tracking scenarios, the adjustable proportional control gain can be adjusted to generate fastest tracking differentiators with varying tracking rates.

[0105] See Figure 3 , Figure 3 This is a schematic diagram of a speed-adjustable fastest tracking differential system according to an embodiment of the present invention, including: a data acquisition device 301 and a speed-adjustable fastest tracking differential 302; wherein, the speed-adjustable fastest tracking differential 302 applies the speed-adjustable fastest tracking differential method as described in the present invention;

[0106] The data acquisition device 301 is used to acquire process signals generated by the thermal power unit and generate input signals.

[0107] The speed-adjustable fastest tracking differentiator 302 is used to receive the input signal and generate a speed-adjustable fastest tracking differential signal corresponding to the input signal.

[0108] As an improvement to the above scheme, the process signal is the primary steam temperature process signal of the thermal power unit control process.

[0109] As an improvement to the above scheme, the expression for the speed-adjustable fastest tracking differentiator is:

[0110] f ASFTD (S)=1-f FPC (S)+f FA (S)

[0111]

[0112]

[0113]

[0114] In the formula, f ASFTD (s) is the Laplace transfer function of the speed-adjustable fastest tracking differentiator; f FPC (s) is the Laplace transfer function output by the 0.5 fixed proportional controller; f FA (s) is the Laplace transfer function output by the first adder; T T T is the integration time constant, in seconds; L:A T L:B K represents the delay time constants of the first delay unit and the second delay unit, respectively, in seconds; P K represents the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units.

[0115] This embodiment uses a first subtractor to subtract the input signal from the second integral signal output by the second integrator to obtain a feedback output signal; it then uses the first integrator to integrate the feedback output signal to obtain a first integral signal; the second integrator uses the first integral signal to obtain a second integral signal; a first proportional control module processes the first integral signal to obtain an adjustable proportional control signal; a second proportional control module processes the second integral signal to obtain a fixed proportional control signal; a second subtractor uses the adjustable proportional control signal as the minuend and the fixed proportional control signal as the subtrahend to obtain a difference signal; and a third adder adds the input signal and the difference signal to obtain a speed-adjustable fastest tracking differential signal. This embodiment, through adjustable differential rate, achieves different tracking efficiencies of the differentiator at different times, meeting the control performance requirements at different times.

[0116] Example 2

[0117] See Figure 8 , Figure 8 This is a schematic diagram of the terminal device structure provided in an embodiment of the present invention.

[0118] One terminal device in this embodiment includes: a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the processor 801 executes the computer program, it implements the steps of the various speed-adjustable steepest tracking differential methods described in the embodiments, for example... Figure 1 All steps of the speed-adjustable steepest tracking differential method shown. Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-described device embodiments, for example: Figure 3 All modules of the speed-adjustable fastest tracking differential system are shown.

[0119] In addition, embodiments of the present invention also provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute the speed-adjustable steepest tracking differential method as described in any of the above embodiments.

[0120] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the diagram, or combine certain components, or different components. For example, the terminal device may also include input / output devices, network access devices, buses, etc.

[0121] The processor 801 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor 801 is the control center of the terminal device, connecting all parts of the terminal device through various interfaces and lines.

[0122] The memory 802 can be used to store the computer programs and / or modules. The processor 801 implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory 802. The memory 802 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0123] Wherein, if the modules / units integrated in the terminal device 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, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. Wherein, the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0124] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0125] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A speed-adjustable steepest tracking differential method, characterized in that, An adjustable-speed-tracking differentiator is applied, comprising: a first subtractor, a first integrator, a second integrator, a first proportional control module, a second proportional control module, a second subtractor, and a third adder; the method includes: Using the first subtractor, the input signal and the second integral signal output by the second integrator are subtracted to obtain the feedback output signal corresponding to the input signal; Using the first integrator, the feedback output signal is integrated to obtain the first integrated signal corresponding to the feedback output signal; Using the second integrator, the first integral signal is integrated to obtain the second integral signal corresponding to the first integral signal; The first proportional control module receives the first integral signal and generates an adjustable proportional control signal corresponding to the first integral signal. The first proportional control module includes a first delay unit, a first adder, and an adjustable proportional controller. The process of receiving the first integral signal and generating the adjustable proportional control signal using the first proportional control module includes: receiving the first integral signal using the first delay unit and generating a first integral delay signal; receiving the first integral delay signal and the first integral signal using the first adder, and performing an addition operation on the first integral delay signal and the first integral signal to obtain a first superimposed signal; and receiving the first superimposed signal using the adjustable proportional controller, and obtaining an adjustable proportional control signal based on the first superimposed signal and a preset first control ratio threshold. Using the second proportional control module, the second integral signal is received, and a fixed proportional control signal corresponding to the second integral signal is generated. Using the second subtractor, the adjustable ratio control signal is received at the minuend and the fixed ratio control signal is received at the subtractor. The difference signal is obtained through subtraction. Using the third adder, the input signal and the difference signal are received, and the speed-adjustable fastest tracking differential signal is obtained through addition.

2. The speed-adjustable steepest tracking differential method according to claim 1, characterized in that, The second proportional control module includes: a second delay unit, a second adder, and a fixed proportional controller; the step of receiving the second integral signal and generating a fixed proportional control signal corresponding to the second integral signal using the second proportional control module includes: Using the second delay unit, the second integral signal is received, and a second integral delay signal is generated; Using the second adder, the second integral delay signal and the second integral signal are received, and the second integral delay signal and the second integral signal are added together to obtain the second superimposed signal; Using the fixed ratio controller, the second superimposed signal is received, and a fixed ratio control signal is obtained based on the second superimposed signal and a preset second control ratio threshold.

3. The speed-adjustable steepest tracking differential method according to claim 1, characterized in that, The first integrator includes: In the formula, f FI (s) is the Laplace transfer function of the first integrator; T T is the integration time constant, in seconds.

4. The speed-adjustable steepest tracking differential method according to claim 1, characterized in that, The second integrator includes: In the formula, f SI (s) is the Laplace transfer function of the second integrator; T T is the integration time constant, in seconds.

5. The speed-adjustable steepest tracking differential method according to claim 1, characterized in that, The first proportional control module includes: In the formula, The Laplace transfer function output by the first proportional control module; The integral time constant is expressed in seconds. is the delay time constant of the first delay unit, in seconds; K represents the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units. .

6. The speed-adjustable fastest tracking differential method according to claim 2, characterized in that, The second proportional control module includes: In the formula, The Laplace transfer function is the output of the second proportional control module; The integral time constant is expressed in seconds. is the delay time constant of the second delay unit, in seconds.

7. A speed-adjustable fastest tracking differential system, characterized in that, include: A data acquisition device and a speed-adjustable fastest tracking differentiator; wherein the speed-adjustable fastest tracking differentiator applies the speed-adjustable fastest tracking differential method as described in any one of claims 1 to 6; The data acquisition device is used to acquire process signals generated by the thermal power unit and generate input signals; The speed-adjustable fastest tracking differentiator is used to receive the input signal and generate a speed-adjustable fastest tracking differential signal corresponding to the input signal.

8. The speed-adjustable fastest tracking differential system according to claim 7, characterized in that, The process signal is the primary steam temperature process signal in the control process of the thermal power unit.

9. The speed-adjustable fastest tracking differential system according to claim 7, characterized in that, The expression for the speed-adjustable fastest tracking differentiator is: In the formula, The Laplace transfer function of the speed-adjustable fastest tracking differentiator; The Laplace transfer function of the output of a 0.5 fixed proportional controller; Let Laplace's transfer function be the output of the first adder; The integral time constant is expressed in seconds. 、 These are the delay time constants for the first and second delay units, respectively, in seconds. K represents the gain of the adjustable proportional controller, in dimensionless units; K is the adjustable proportional gain input, in dimensionless units.

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