A feasibility analysis method and system for steam turbine valve partial movement test

Abstract

The present invention discloses a feasibility analysis method and system for a steam turbine valve partial activity test, which relates to the field of steam turbine control technology and includes performing a feasibility analysis on a valve partial activity test; designing a partial activity test SLC and test automatic logic for a main steam valve; and designing a partial activity test SLC and test automatic logic for a regulating valve. The steam turbine valve partial activity test feasibility analysis method provided by the present invention improves maintenance efficiency and equipment reliability through feasibility analysis and implementation of a regulating valve partial activity test, thereby improving the operational safety and power generation efficiency of the power station. By utilizing the LDVT configured for the main steam valve, the risk of long-term operation is effectively reduced, and the maintenance efficiency and equipment reliability of the main steam valve are improved. By implementing a valve partial activity test logic implementation scheme, the equipment maintenance efficiency is improved and maintenance costs are reduced. The present invention achieves better results in terms of maintenance efficiency, operational safety, and equipment reliability.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine control, in particular to a feasibility analysis method for a steam turbine valve partial activity test. Background Art

[0002] In modern power systems, steam turbines are one of the core devices for power generation. Their performance and reliability are crucial to the stable operation of the entire power system. Valves, especially main steam valves and regulating valves, are key components in steam turbines for controlling steam flow. As the power industry's requirements for power generation efficiency and reliability continue to increase, higher requirements are also placed on the maintenance and testing of steam turbine valves. Traditional valve testing methods usually require shutdown, which not only affects power generation efficiency but may also cause damage to equipment. In addition, due to the lack of real-time and accurate monitoring methods, traditional methods cannot accurately evaluate the working status of the valves, resulting in inefficient maintenance and troubleshooting.

[0003] In response to these challenges, some new technologies and methods have emerged in recent years to improve the efficiency and accuracy of turbine valve testing. However, these existing technologies still have some limitations. For example, some technologies may require complex equipment support, which increases maintenance costs; other technologies, although they can perform tests without shutting down the machine, may lack sufficient accuracy and reliability. Therefore, developing a new method that can perform valve testing without shutting down the machine while ensuring test accuracy and reliability is of great significance to improving the operating efficiency and reliability of steam turbines. Summary of the Invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is: the existing valve partial activity test method has the problems of abnormal center valve servo valve, abnormal main steam valve pilot valve, oxide scale deposition on valve core and valve sleeve, as well as the optimization problem of how to conduct feasibility analysis of valve partial activity test.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a feasibility analysis method for the activity test of the steam turbine valve part, including performing a feasibility analysis on the activity test of the valve part; designing a partial activity test SLC and test automatic logic for the main steam valve; and designing a partial activity test SLC and test automatic logic for the regulating valve.

[0007] As a preferred embodiment of the feasibility analysis method for the steam turbine valve partial activity test of the present invention, the steam valve portion includes the feasibility of the throttle valve partial activity test. In the steam turbine valve management logic, the output instructions of the high and medium pressure throttle valve servo valves come from the throttle valve limit and throttle valve flow instruction small selection unit. The throttle valve partial activity test is implemented by setting a small valve limit and gradually closing the throttle valve. The simulated actual control system response is expressed as:

[0008]

[0009] Among them, μ is the feedback adjustment coefficient, ξ and σ are the attenuation coefficients of the feedback adjustment term and the time delay term respectively, θ is the influence coefficient of the time delay factor, λ is the adjustment coefficient of the servo valve output instruction, which is used to simulate the precise control of the servo valve on the throttle operation, n is the summation upper limit, α, β, and γ are adjustment coefficients, which are used to adjust the response speed or amplitude in the formula.

[0010] As a preferred embodiment of the feasibility analysis method for the steam turbine valve portion activity test of the present invention, the valve portion also includes the feasibility of the main steam valve portion activity test, which converts the LVDT analog quantity into main steam valve switch feedback. The normal switch of the main steam valve is realized by the pilot valve. During normal operation, the two tripping solenoid valves are energized and closed to establish a safety oil pressure. When the pilot valve is de-energized and opened, power oil is provided. The test success index is expressed as:

[0011]

[0012] Among them, A, B, C, and D are coefficients adjusted based on actual parameters, V is the main valve opening and closing speed, L is the load size, LDVT is the position feedback, t is time, λ is the attenuation coefficient, which represents the risk attenuation during the test, and x n is the test data, is the average value of the test data, N is the number of data points, k is the sensitivity coefficient of the test success, T is the actual temperature, T0 is the ideal temperature condition, and the higher the Y value, the higher the probability of success.

[0013] As a preferred embodiment of the feasibility analysis method for the steam turbine valve partial movement test of the present invention, the partial movement test SLC and test automatic logic for the main steam valve design include a main steam valve partial stroke movement test logic formula, a Bessel function is introduced to represent the vibration mode of the valve at different openings, and a Laplace transform is introduced to process the time domain to frequency domain conversion of the valve dynamic response, which is expressed as follows:

[0014]

[0015] Where F(t) is the time required for the main steam valve to be partially closed after Laplace inverse transformation, T is the total test time, J n It is the first type of Bessel function, which represents the vibration characteristics of the valve at different openings. α and τ are the vibration frequency and time constant, respectively, which are used to adjust the sensitivity and response speed of the model. The value range of F(t) represents the time required from the start of the experiment to the main steam valve reaching 85% opening. The value reflects the speed and efficiency of the valve action.

[0016] As a preferred solution of the feasibility analysis method for the partial activity test of the steam turbine valve described in the present invention, the main steam valve design partial activity test SLC and the test automatic logic also include the main steam valve partial stroke activity test logic, the main steam valve partial activity test SLC is put into operation, the program is started, when the main steam valve LVDT is detected to be greater than 100%, the main steam valve pilot valve is closed, the LVDT display feedback decreases, and the timing is started. If the LVDT feedback is less than 85% or the closing time is greater than 2.5s, the pilot valve is opened and the LVDT rises. If the main steam valve LVDT is detected to be greater than 100%, the program ends, the activity test is displayed to be successful, and the SLC is exited. If the timing exceeds 5s and the LVDT is less than 99%, the activity test fails.

[0017] As a preferred embodiment of the feasibility analysis method for the steam turbine valve partial movement test of the present invention, the valve partial movement test SLC and the test automatic logic include a valve partial movement test logic formula, which uses Fourier series to represent the periodic change of the valve position and combines with Gaussian function to simulate the probability distribution of the valve reaching the specified position. The formula is expressed as follows:

[0018]

[0019] Among them, G(y) is the function of the valve position changing with time, is a Gaussian function used to simulate the probability distribution of the valve reaching the specified position, μ k and σ k are the expected position and standard deviation respectively, a0, a n 、b n is the coefficient of the Fourier series, which represents the periodic change of the valve position. t is the current time, T is the period length, and the value range of G(y) reflects the ability of the valve to reach and maintain the specified position in the experiment through probability distribution and periodic changes. The higher the value, the better the performance and responsiveness of the valve.

[0020] As a preferred embodiment of the feasibility analysis method for the partial activity test of a steam turbine valve according to the present invention, the partial activity test SLC and the test automatic logic for the regulating valve are designed and further include the partial activity test logic for the regulating valve. The medium-pressure regulating valve partial activity test SLC is put into operation and the program is started. When the regulating valve LVDT is detected to be greater than 100%, the regulating valve limit is reduced by 2% every 5 seconds, and the LVDT decreases. If the valve limit is less than 100% and the difference between the valve limit and the LVDT feedback is less than 1%, the valve limit continues to be reduced. If the LVDT is less than 85%, the regulating valve limit is increased by 2% every 5 seconds. When the valve limit reaches 105%, the SLC is automatically exited. If the difference between the valve limit and the LVDT feedback is less than 1% for 5 seconds, the activity test is displayed as successful. Otherwise, the activity test is displayed as failed. When the valve limit automatically increases to 105%, the SLC is exited.

[0021] Another object of the present invention is to provide a feasibility analysis system for the activity test of the steam turbine valve part, which can analyze the feasibility of the activity test of the main steam valve and regulating valve part of the steam turbine through the feasibility analysis module, thereby solving the current problem that the long-term operation of the steam valve may not cause oxide scale deposition on the valve core and valve sleeve, abnormality of the main steam valve pilot valve, abnormality of the intermediate regulating valve servo valve, etc. due to long-term non-action, and it is difficult to detect them in time.

[0022] As a preferred solution of the feasibility analysis system for the active test of the steam turbine valve part described in the present invention, it includes: a feasibility analysis module, a main steam valve logic module, and a regulating valve logic module; the feasibility analysis module is used to perform a feasibility analysis on the active test of the valve part; the main steam valve logic module is used to design the active test SLC and test automatic logic of the main steam valve; the regulating valve logic module is used to design the active test SLC and test automatic logic of the regulating valve.

[0023] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that the processor executes the computer program to implement a step of a feasibility analysis method for a partial activity test of a steam turbine valve.

[0024] A computer-readable storage medium stores a computer program thereon, wherein when the computer program is executed by a processor, the steps of a feasibility analysis method for a steam turbine valve partial activity test are implemented.

[0025] Beneficial effects of the present invention: The feasibility analysis method for the partial activity test of the steam turbine valve provided by the present invention ensures the intuitive judgment of the operating status of the regulating valve through the feasibility analysis and implementation of the partial activity test of the regulating valve, improves the maintenance efficiency and the reliability of the equipment, thereby improving the operating safety and power generation efficiency of the power station. By utilizing the LDVT configured for the main steam valve, the analog quantity is converted into switch feedback, and the precise control of the partial activity test of the main steam valve is realized, which effectively reduces the risks during long-term operation, such as oxide scale deposition on the valve core and valve sleeve, and improves the maintenance efficiency and equipment reliability of the main steam valve. By implementing the logic implementation scheme of the partial activity test of the valve, the equipment maintenance efficiency is improved and the maintenance cost is reduced. The present invention achieves better results in terms of maintenance efficiency, operation safety and equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without any creative effort. Among them:

[0027] Figure 1 The present invention provides an overall flow chart of a feasibility analysis method for a steam turbine valve partial activity test according to the first embodiment of the present invention.

[0028] Figure 2 The third embodiment of the present invention provides an overall flow chart of a feasibility analysis system for a steam turbine valve partial activity test. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0030] Example 1

[0031] Reference Figure 1 , as one embodiment of the present invention, provides a feasibility analysis method for a steam turbine valve partial movable test, comprising:

[0032] S1: Conduct feasibility analysis on the active test of the valve part.

[0033] Furthermore, the feasibility of the activity test of the valve part including the regulating valve part is tested.

[0034] It should be noted that in the steam turbine valve management logic, the output instructions of the high and medium pressure throttle servo valves come from the throttle valve limit and throttle flow instruction small selection unit. By setting a small valve limit and gradually closing the throttle valve, the throttle partial activity test is realized. The simulation of the actual control system response is expressed as:

[0035]

[0036] Among them, μ is the feedback adjustment coefficient, ξ and σ are the attenuation coefficients of the feedback adjustment term and the time delay term respectively, θ is the influence coefficient of the time delay factor, λ is the adjustment coefficient of the servo valve output instruction, which is used to simulate the precise control of the servo valve on the throttle operation, n is the summation upper limit, α, β, and γ are adjustment coefficients, which are used to adjust the response speed or amplitude in the formula.

[0037] Furthermore, the valve part also includes the feasibility of the main steam valve part activity test.

[0038] It should be noted that the LVDT analog quantity is converted into the main steam valve switch feedback. The normal switch of the main steam valve is realized by the pilot valve. During normal operation, the two tripping solenoid valves are energized and closed to establish a safe oil pressure. When the pilot valve loses power and opens, power oil is provided. The test success index is expressed as:

[0039]

[0040]

[0041] Among them, A, B, C, and D are coefficients adjusted based on actual parameters, V is the main valve opening and closing speed, L is the load size, LDVT is the position feedback, t is time, λ is the attenuation coefficient, which represents the risk attenuation during the test, and x n is the test data, is the average value of the test data, N is the number of data points, k is the sensitivity coefficient of the test success, T is the actual temperature, T0 is the ideal temperature condition, and the higher the Y value, the higher the probability of success.

[0042] S2: Design some active tests SLC and test automatic logic for main steam valve.

[0043] Furthermore, a partial activity test SLC and test automatic logic are designed for the main steam valve, including a main steam valve partial stroke activity test logic formula.

[0044] It should be noted that the Bessel function is introduced to represent the vibration mode of the valve at different openings, and the Laplace transform is introduced to process the conversion from the time domain to the frequency domain of the valve dynamic response. The formula is expressed as:

[0045]

[0046] Where F(t) is the time required for the main steam valve to be partially closed after Laplace inverse transformation, T is the total test time, J n It is the first type of Bessel function, which represents the vibration characteristics of the valve at different openings. α and τ are the vibration frequency and time constant, respectively, which are used to adjust the sensitivity and response speed of the model. The value range of F(t) represents the time required from the start of the experiment to the main steam valve reaching 85% opening. The value reflects the speed and efficiency of the valve action.

[0047] Furthermore, the partial activity test SLC and test automatic logic designed for the main steam valve also include the main steam valve partial stroke activity test logic.

[0048] It should be noted that the main steam valve partial activity test SLC is put into operation and the program is started. When the main steam valve LVDT is detected to be greater than 100%, the main steam valve pilot valve is closed, the LVDT display feedback drops, and timing is started. If the LVDT feedback is less than 85% or the closing time is greater than 2.5s, the pilot valve is opened and the LVDT rises. If the main steam valve LVDT is detected to be greater than 100%, the program ends, indicating that the activity test is successful and exiting the SLC. If the timing exceeds 5s and the LVDT is less than 99%, it indicates that the activity test has failed.

[0049] S3: Design some active test SLC and test automatic logic for the valve.

[0050] Furthermore, a partial activity test SLC and test automatic logic are designed for the valve, including a partial activity test logic formula for the valve.

[0051] It should be noted that the Fourier series is used to represent the periodic change of the throttle position, and the Gaussian function is combined to simulate the probability distribution of the throttle reaching the specified position. The formula is expressed as follows:

[0052]

[0053] Among them, G(y) is the function of the valve position changing with time, is a Gaussian function used to simulate the probability distribution of the valve reaching the specified position, μ k and σ k are the expected position and standard deviation respectively, a0, a n 、b n is the coefficient of the Fourier series, which represents the periodic change of the valve position. t is the current time, T is the period length, and the value range of G(y) reflects the ability of the valve to reach and maintain the specified position in the experiment through probability distribution and periodic changes. The higher the value, the better the performance and responsiveness of the valve.

[0054] Furthermore, the partial activity test SLC and test automatic logic designed for the valve also include the partial activity test logic of the valve.

[0055] It should be noted that the medium-pressure throttle valve partial activity test SLC is put into operation and the program is started. When the throttle valve LVDT is detected to be greater than 100%, the throttle valve limit is reduced by 2% every 5 seconds, and the LVDT drops. If the valve limit is less than 100% and the difference between the valve limit and the LVDT feedback is less than 1%, the valve limit continues to be reduced. If the LVDT is less than 85%, the throttle valve limit is increased by 2% every 5 seconds. When the valve limit reaches 105%, the SLC is automatically exited. If the difference between the valve limit and the LVDT feedback is less than 1% for 5 seconds, it indicates that the activity test is successful. Otherwise, it indicates that the activity test has failed. When the valve limit automatically increases to 105%, the SLC exits.

[0056] It should also be noted that the partial activity test of the valve from 100% to 85% should be carried out one by one to prevent misoperation. The closing time of the main steam valve of different units is different and should be adjusted according to the actual action time of the valve. Before the test, a comprehensive check should be made to ensure that the high and medium pressure main steam valves and regulating valve LVDT displays are normal. If the LVDT jumps, it should be verified immediately and no test should be carried out. The valve activity test SLC should be interlocked with the ATT test SLC to avoid logical confusion.

[0057] Example 2

[0058] One embodiment of the present invention provides a feasibility analysis method for a partial movable test of a steam turbine valve. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0059] Controlled testing of steam turbine high-pressure and intermediate-pressure throttle valves was conducted. The experimental setup consisted of a test platform equipped with an LVDT (linear differential transformer) to provide accurate valve position feedback, pressure sensors, flow meters, and a control system capable of executing a partially active test sequence. The test simulated various conditions under which a steam turbine would normally operate, including steps such as changing load, adjusting valve position, and measuring the response time and effectiveness of valve movement. The purpose was to demonstrate that the method of the present invention could detect problems that would not be apparent without detailed testing, such as minor deposits or wear, which could lead to failure over time. Valve position, opening and closing times, response to control inputs, and any deviations from expected behavior were collected and compared with baseline measurements taken from current standard operating procedures.

[0060] As shown in Table 1, the opening times for the high-pressure valves were recorded as 2.3 seconds and 2.4 seconds, while the opening times for the medium-pressure valves were 1.85 seconds and 1.57 seconds. The closing times showed a wider variation, with the high-pressure valves requiring more than 15 seconds and the medium-pressure valves slightly less. This highlights the effectiveness of the method of the present invention in identifying potential lags or deviations in valve operation. The method of the present invention detects potential problems in advance, provides a more detailed understanding of valve operation and health, and provides more effective maintenance planning, reducing the possibility of unplanned downtime, and enhancing overall operational efficiency and safety.

[0061] Table 1 Experimental comparison table

[0062] Valve position Opening time Closing Time Deviations from expected behavior 1A high voltage 100％ 2.3s 15.66s none 1B high voltage 100％ 2.4s 15.78s none 1A medium voltage 100％ 1.85s 13.22s There is a slight delay when turning on 1B medium voltage 100％ 1.57s 12.53s There is a slight delay in closing

[0063] Example 3

[0064] Reference Figure 2 , as an embodiment of the present invention, provides a feasibility analysis system for a steam turbine valve partial activity test, including: a feasibility analysis module, a main steam valve logic module, and a regulating valve logic module.

[0065] The feasibility analysis module is used to perform feasibility analysis on the active test of the valve part; the main steam valve logic module is used to design the active test SLC and test automatic logic for the main steam valve; the regulating valve logic module is used to design the active test SLC and test automatic logic for the regulating valve.

[0066] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0067] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For 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 conjunction with, an instruction execution system, apparatus, or device.

[0068] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0069] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logical functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc. It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to be limiting. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications should be encompassed by the claims of the present invention.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A feasibility analysis method for a steam turbine valve partial movement test, characterized in that: include: Conduct feasibility analysis on the active test of the valve part; Design some active test SLC and test automatic logic for main steam valve; Design some active test SLC and test automatic logic for the valve; The valve part includes the feasibility test of the throttle valve part. In the turbine valve management logic, the output instructions of the high and medium pressure throttle valve servo valve come from the throttle valve limit and throttle flow instruction small selection unit. By setting a small valve limit and gradually closing the throttle valve, the throttle valve part activity test is realized. The simulation of the actual control system response is expressed as: Wherein, μ is the feedback adjustment coefficient, ξ and σ are the attenuation coefficients of the feedback adjustment term and the time delay term, respectively, θ is the influence coefficient of the time delay factor, λ is the adjustment coefficient of the servo valve output command, which is used to simulate the precise control of the servo valve on the throttle operation, n is the summation upper limit, α, β, and γ are adjustment coefficients used to adjust the response speed or amplitude in the formula; The valve part also includes the feasibility test of the main steam valve part activity. The LVDT analog quantity is converted into the main steam valve switch feedback. The normal switch of the main steam valve is realized by the pilot valve. During normal operation, the two tripping solenoid valves are energized and closed to establish a safe oil pressure. When the pilot valve is de-energized and opened, power oil is provided. The test success index is expressed as: Among them, A, B, C, and D are coefficients adjusted based on actual parameters, V is the main valve opening and closing speed, L is the load size, LDVT is the position feedback, t is time, λ is the attenuation coefficient, which represents the risk attenuation during the test, and x n is the test data, is the average value of the test data, N is the number of data points, k is the sensitivity coefficient of the test success, T is the actual temperature, T0 is the ideal temperature condition, and the higher the Y value, the higher the probability of success; The SLC and test automation logic for the main steam valve partial travel test are designed, including the main steam valve partial travel test logic formula. Bessel functions are introduced to represent the vibration modes of the valve at different openings, and Laplace transform is introduced to process the conversion from the time domain to the frequency domain of the valve dynamic response. The formula is expressed as follows: Where F(t) is the time required for the main steam valve to be partially closed after Laplace inverse transformation, T is the total test time, J n It is the first type of Bessel function, which represents the vibration characteristics of the valve at different openings. α and τ are the vibration frequency and time constant, respectively, which are used to adjust the sensitivity and response speed of the model. The value range of F(t) represents the time required from the start of the experiment to the main steam valve reaching 85% opening. The value reflects the speed and efficiency of the valve action. The SLC and automatic test logic for the partial activity test of the throttle valve are designed, including the logic formula for the partial activity test of the throttle valve. The Fourier series is used to represent the periodic change of the throttle valve position, and the Gaussian function is combined to simulate the probability distribution of the throttle valve reaching the specified position. The formula is expressed as follows: Among them, G(y) is the function of the valve position changing with time, is a Gaussian function used to simulate the probability distribution of the valve reaching the specified position, μ k and σ k are the expected position and standard deviation respectively, a0, a n 、b n is the coefficient of the Fourier series, which represents the periodic change of the valve position. t is the current time, T is the period length, and the value range of G(y) reflects the ability of the valve to reach and maintain the specified position in the experiment through probability distribution and periodic changes. The higher the value, the better the performance and responsiveness of the valve.

2. The feasibility analysis method for a steam turbine valve partial movement test according to claim 1, characterized in that: The main steam valve design partial activity test SLC and test automatic logic also include main steam valve partial stroke activity test logic. The main steam valve partial activity test SLC is put into operation and the program is started. When the main steam valve LVDT is detected to be greater than 100%, the main steam valve pilot valve is closed, the LVDT display feedback decreases, and timing is started. If the LVDT feedback is less than 85% or the closing time is greater than 2.5s, the pilot valve is opened and the LVDT rises. If the main steam valve LVDT is detected to be greater than 100%, the program ends, the activity test is displayed to be successful, and the SLC is exited. If the timing exceeds 5s and the LVDT is less than 99%, the activity test fails.

3. The feasibility analysis method for a steam turbine valve partial movement test according to claim 2, characterized in that: The SLC and automatic test logic for the partial activity test of the throttle valve design also include the partial activity test logic of the throttle valve. The SLC for the partial activity test of the medium-pressure throttle valve is put into operation and the program is started. When the throttle valve LVDT is detected to be greater than 100%, the throttle valve limit is reduced by 2% every 5 seconds, and the LVDT drops. If the valve limit is less than 100% and the difference between the valve limit and the LVDT feedback is less than 1%, the valve limit continues to be reduced. If the LVDT is less than 85%, the throttle valve limit is increased by 2% every 5 seconds. When the valve limit reaches 105%, the SLC is automatically exited. If the difference between the valve limit and the LVDT feedback is less than 1% for 5 seconds, it is displayed that the activity test is successful. Otherwise, it is displayed that the activity test has failed. When the valve limit automatically increases to 105%, the SLC exits.

4. A system using the feasibility analysis method for steam turbine valve partial movement test according to any one of claims 1 to 3, characterized in that: Including feasibility analysis module, main steam valve logic module, and valve adjustment logic module; The feasibility analysis module is used to perform feasibility analysis on the activity test of the valve part; The main steam valve logic module is used to design some active test SLC and test automatic logic for the main steam valve; The gate logic module is used to design some active test SLC and test automatic logic for the gate.

5. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the feasibility analysis method for a steam turbine valve partial activity test according to any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the feasibility analysis method for a steam turbine valve partial activity test are implemented as described in any one of claims 1 to 3.

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