Turbine valve test method and device, storage medium and computer equipment

Abstract

The invention discloses a steam turbine valve test method and device, a storage medium and computer equipment. The method comprises the steps that a valve flow instruction value is obtained, and test valves, non-test valves and the number of the non-test valves are determined in a plurality of steam turbine valves; the valve opening of the test valve is reduced, so that the valve flow of the test valve is reduced until the valve flow of the test valve is reduced to zero; the flow reduction value of the test valve in the flow reduction process is determined in real time, and the flow compensation theoretical value of each non-test valve is determined based on the flow reduction value and the number of the valves; the valve flow of the test valve is determined in real time, a variable flow compensation coefficient corresponding to the valve flow is determined, and the actual flow compensation value of the non-test valve is determined based on the variable flow compensation coefficient and the theoretical flow compensation value of the non-test valve; and based on the actual flow compensation value, the valve flow of the non-test valve is improved. The method can improve the detection efficiency of the steam turbine valve.

Description

Test methods, apparatus, storage media and computer equipment for steam turbine valves Technical Field

[0001] This invention relates to the field of steam turbine valve testing, and in particular to a test method, apparatus, storage medium, and computer equipment for steam turbine valves. Background Technology

[0002] The steam turbine unit is the core equipment of a thermal power generating unit. Its main steam valve is kept fully open for extended periods, and some regulating valves are also kept fully open under sequence valve operation. According to industry standards and maintenance requirements, the turbine valves of thermal power generating units must undergo monthly stroke testing to check valve flexibility, prevent jamming, and ensure rapid steam shut-off in emergencies. This prevents accidents such as bearing burnout, system fires, or even runaway caused by overspeeding of the thermal power generating turbine unit, making this test a key inspection item for technical supervision units.

[0003] Currently, conventional valve stroke tests require closing and reopening selected turbine valves. This process necessitates switching the valve mode from sequential to single-valve mode, adjusting the unit's generating load to approximately 60%, controlling the overall turbine flow rate below 75%, and reducing the valve opening / closing rate to 0.1% / s. Simultaneously, the proportional-integral action of the power PID controller is enhanced, and a pause function is implemented. However, during valve stroke tests, some valves enter the test state, causing load deviations that are only corrected by the power PID controller. In some positions, the flow characteristics of the valves deviate excessively in the positive direction, and the strong power PID action at this point can easily lead to load oscillations in the generator unit. Furthermore, the low test rate means that a single valve test takes at least 20 minutes, resulting in extremely low valve testing efficiency. This also exposes the thermal power turbine unit to excessively prolonged abnormal operating conditions, increasing the risk of unit vibration and abnormal bearing temperatures, making it difficult to meet the requirements of efficient power plant operation and maintenance. Summary of the Invention

[0004] In view of this, this application provides a test method, apparatus, storage medium and computer equipment for steam turbine valves, the main purpose of which is to solve the technical problem of low detection efficiency of steam turbine valves.

[0005] According to a first aspect of the present invention, a testing method for a steam turbine valve is provided. The method includes: acquiring a valve flow command value for each steam turbine valve, identifying test valves and non-test valves among a plurality of steam turbine valves, and determining the number of non-test valves; gradually reducing the valve opening of the test valve, causing the valve flow of the test valve to continuously decrease until the valve flow of the test valve drops to zero; determining in real time the flow reduction value of the test valve during the valve flow reduction process, and determining a theoretical flow compensation value for each of the non-test valves based on the flow reduction value and the number of non-test valves; determining in real time the valve flow of the test valve, determining a variable flow compensation coefficient corresponding to the valve flow, and determining an actual flow compensation value for the non-test valve based on the variable flow compensation coefficient and the theoretical flow compensation value for the non-test valve; and increasing the valve flow of the non-test valve based on the actual flow compensation value to compensate for the flow reduction value of the test valve during the valve flow reduction process.

[0006] In an optional embodiment, gradually reducing the valve opening of the test valve to continuously reduce the valve flow rate of the test valve includes: obtaining a preset flow adjustment rate, gradually reducing the valve opening of the test valve to continuously reduce the valve flow rate of the test valve at the flow adjustment rate until the valve flow rate of the test valve drops to zero.

[0007] In an optional embodiment, determining the flow reduction value of the test valve in real time during the valve flow reduction process includes: determining the valve flow rate of the test valve in real time during the valve flow reduction process; calculating the difference between the valve flow command value and the valve flow rate to obtain the flow reduction value.

[0008] In an optional embodiment, gradually reducing the valve opening of the test valve, causing the valve flow rate of the test valve to continuously decrease at the flow rate adjustment rate until the valve flow rate of the test valve drops to zero, includes: calculating the real-time flow command value of the test valve during the flow reduction process based on the flow rate adjustment rate and the valve flow command value; matching the real-time flow command value to obtain a target valve opening value corresponding to the real-time flow command value based on a preset valve opening and valve flow rate correspondence; and controlling the valve opening of the test valve to adjust to the target valve opening value.

[0009] In an optional embodiment, increasing the valve flow rate of the non-test valve based on the actual flow compensation value includes: summing the actual flow compensation value and the valve flow command value to obtain the actual flow command value; matching the actual flow command value to obtain a target valve opening value corresponding to the actual flow command value based on a preset valve opening and valve flow rate correspondence; and controlling the valve opening of the non-test valve to adjust to the target valve opening value.

[0010] In an optional embodiment, the method further includes: with the test valve closed, gradually increasing the valve opening of the test valve, causing the valve flow rate of the test valve to continuously increase at the flow rate adjustment rate until the valve flow rate of the test valve reaches the valve flow command value; determining the flow increase value of the test valve during the valve flow rate increase process in real time, and determining the theoretical flow offset value for each of the non-test valves based on the flow increase value and the number of non-test valves; determining the valve flow rate of the test valve in real time, determining the variable flow compensation coefficient corresponding to the valve flow rate, and determining the actual flow offset value of the non-test valves based on the variable flow compensation coefficient and the theoretical flow offset value of the non-test valves; and reducing the valve flow rate of the non-test valves based on the actual flow offset value to offset the flow increase value of the test valve during the valve flow rate increase process.

[0011] In an optional embodiment, determining the variable flow compensation coefficient corresponding to the valve flow rate includes: obtaining a preset mapping relationship between valve flow rate and variable flow compensation coefficient, and determining the variable flow compensation coefficient corresponding to the valve flow rate in the mapping relationship based on the real-time valve flow rate.

[0012] According to a second aspect of the present invention, a testing apparatus for turbine valves is provided. The apparatus comprises: an information acquisition module, configured to acquire a valve flow command value for each turbine valve, identify test valves and non-test valves among a plurality of turbine valves, and determine the number of non-test valves; a test execution module, configured to gradually reduce the valve opening of the test valves, causing the valve flow of the test valves to continuously decrease until the valve flow of the test valves drops to zero; a compensation calculation module, configured to determine in real time the flow reduction value of the test valves during the valve flow reduction process, and determine a theoretical flow compensation value for each of the non-test valves based on the flow reduction value and the number of non-test valves; a compensation adjustment module, configured to determine in real time the valve flow of the test valves, determine a variable flow compensation coefficient corresponding to the valve flow, and determine an actual flow compensation value for the non-test valves based on the variable flow compensation coefficient and the theoretical flow compensation value for the non-test valves; and an opening adjustment module, configured to increase the valve flow of the non-test valves based on the actual flow compensation value to compensate for the flow reduction value of the test valves during the valve flow reduction process.

[0013] According to a third aspect of the present invention, a storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described test method for turbine valves.

[0014] According to a fourth aspect of the present invention, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described test method for turbine valves.

[0015] This invention provides a testing method, apparatus, storage medium, and computer equipment for turbine valves. By calculating the flow reduction value of the test valve in real time, and combining this with the number of non-test valves, the theoretical flow compensation value for each non-test valve is determined. Then, using a variable flow compensation coefficient matched to the test valve's flow rate, a precise actual flow compensation value is obtained. This allows the non-test valves to increase their opening degree according to this actual flow compensation value, compensating for the flow loss during the flow reduction process of the test valve. Measurement and calculation errors are then corrected by the existing power PID controller. This technical solution achieves dynamic flow compensation by utilizing non-test valves during the test valve's closing process. It ensures stable load on the thermal power turbine unit without reducing the valve opening / closing rate or strengthening the PID controller, significantly shortening the testing time for a single valve group and greatly improving testing efficiency. Simultaneously, it effectively suppresses unit load fluctuations during the test, avoids load regulation oscillations, reduces the dwell time of the thermal power turbine unit under abnormal operating conditions, effectively reduces the risk of unit vibration and abnormal bearing temperature, and meets the needs of efficient and stable operation and maintenance of power plants.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their descriptions, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 shows a flowchart of a test method for a steam turbine valve according to an embodiment of the present invention; Figure 2 shows a structural schematic diagram of a thermal power generation steam turbine unit according to an embodiment of the present invention; Figure 3 shows a calculation flowchart of a test method for a steam turbine valve according to an embodiment of the present invention; Figure 4 shows a schematic diagram of the compensation effect of a variable flow compensation coefficient according to an embodiment of the present invention; Figure 5 shows a structural schematic diagram of a test apparatus for a steam turbine valve according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0019] Currently, conventional valve stroke tests require closing and reopening selected turbine valves. This process necessitates switching the valve mode from sequential to single-valve mode, adjusting the unit's power generation load to approximately 60%, controlling the overall turbine flow rate below 75%, and reducing the valve opening / closing rate to 0.1% / s. Simultaneously, the proportional-integral action of the power PID controller is enhanced, and a pause function is implemented. However, during valve stroke tests, some valves enter the test state, and the resulting load deviation is only corrected by the power PID controller. In some positions, the flow characteristics of the valves exhibit excessive positive deviations, and the strong power PID action at this point can easily lead to load oscillations in the unit. Furthermore, the low test rate means that a single valve test takes at least 20 minutes, resulting in extremely low valve testing efficiency. This also causes the thermal power turbine unit to operate under abnormal conditions for an extended period, increasing the risk of unit vibration and abnormal bearing temperatures, making it difficult to meet the requirements of efficient power plant operation and maintenance.

[0020] To address the aforementioned issues, in one embodiment, as shown in Figure 1, a testing method for turbine valves is provided. Taking the application of this method to computer equipment as an example, the method includes the following steps: 101. Obtain the valve flow command value for each turbine valve, identify the test valves and non-test valves among multiple turbine valves, and determine the number of non-test valves among the non-test valves.

[0021] Here, the valve flow command value of each turbine valve can be the same; as an example, as shown in Figure 2, a thermal power generation turbine unit can include multiple regulating valves and main valves. Specifically, the main steam can flow through the first main valve 100 to the first regulating valve 110, the second regulating valve 120, and the third regulating valve 130; the main steam can also flow through the second main valve 200 to the fourth regulating valve 210, the fifth regulating valve 220, and the sixth regulating valve 230 to output steam to the turbine 300.

[0022] In actual valve testing, one of the aforementioned regulating valves can be controlled to undergo a full-stroke test and designated as the test valve, while the other regulating valves are designated as non-test valves. When testing the main valve, the regulating valve connected to the main valve is considered as the test valve.

[0023] Furthermore, the valve flow command value is the steam flow rate set for each valve during normal operation of a thermal power turbine unit without considering testing; that is, the steam flow rate value set for each valve during actual operation.

[0024] 102. Gradually reduce the valve opening of the test valve to continuously reduce the valve flow rate until the valve flow rate drops to zero.

[0025] Specifically, a preset flow adjustment rate can be obtained, which is the preset rate at which the flow rate decreases or increases when the valve is being tested.

[0026] Furthermore, the valve opening of the test valve is gradually reduced, so that the valve flow rate of the test valve continues to decrease at a decreasing rate of flow adjustment until the valve flow rate of the test valve drops to zero.

[0027] Here, the real-time flow command value of the test valve during the flow reduction process can be calculated in real time based on the flow adjustment rate and the valve flow command value. Specifically, the flow adjustment amount is set to zero in the initial state, and the flow adjustment amount is gradually increased from zero at the flow adjustment rate, and the flow adjustment amount is calculated in real time during this process. At a specific moment, the real-time flow command value is the valve flow command value minus the flow adjustment amount at that moment, so that the real-time flow command value at each moment can be calculated in real time during the valve test.

[0028] Furthermore, based on a preset correlation between valve opening and valve flow rate, a target valve opening value corresponding to the real-time flow command value is obtained by matching the real-time flow command value. Here, the aforementioned correlation can exist as a valve flow characteristic curve, where the horizontal axis of the curve represents the real-time flow command value, and the vertical axis represents the target valve opening value. The corresponding target valve opening value can be determined on the curve based on the real-time flow command value. Further, the valve opening of the test valve is adjusted to the target valve opening value to reduce the valve flow rate of the test valve. Here, during the valve closing process, the above calculations can be performed in real time, and the opening of the test valve can be adjusted based on the real-time calculated target valve opening value to control the test valve to close at a specific flow rate reduction rate.

[0029] 103. Determine the flow reduction value of the test valve during the valve flow reduction process in real time, and determine the theoretical flow compensation value for each of the non-test valves based on the flow reduction value and the number of non-test valves.

[0030] Specifically, the valve flow rate during the valve flow rate reduction process can be determined in real time, and the difference between the valve flow rate command value and the valve flow rate can be calculated to obtain the flow rate reduction value.

[0031] Furthermore, the flow reduction value can be divided by the number of non-test valves to determine the theoretical flow compensation value for each non-test valve.

[0032] 104. Determine the valve flow rate of the test valve in real time, determine the variable flow compensation coefficient corresponding to the valve flow rate, and determine the actual flow compensation value of the non-test valve based on the variable flow compensation coefficient and the theoretical flow compensation value of the non-test valve.

[0033] Specifically, the valve flow rate of the test valve can be monitored, and a preset mapping relationship between the valve flow rate and the variable flow compensation coefficient can be obtained. In this mapping relationship, each valve flow rate corresponds to a preset variable flow compensation coefficient. Based on the real-time valve flow rate, the variable flow compensation coefficient corresponding to the valve flow rate is determined in the mapping relationship. Here, as the valve flow rate command of the test valve decreases, the variable flow compensation coefficient gradually decreases.

[0034] Furthermore, at a specific moment, the actual flow compensation value of the non-test valve can be the product of the theoretical flow compensation value of the non-test valve at that moment and the variable flow compensation coefficient at that moment. Here, the above calculation process can be performed in real time to calculate the real-time actual flow compensation value of each non-test valve.

[0035] 105. Based on the actual flow compensation value, increase the valve flow rate of the non-test valve to compensate for the flow reduction value of the test valve during the valve flow rate reduction process.

[0036] Specifically, for each non-test valve, the actual flow compensation value and the valve flow command value can be summed to obtain the actual flow command value for the non-test valve. Then, based on a preset correlation between valve opening and valve flow, the target valve opening value corresponding to the actual flow command value is obtained. This correlation can also exist as a valve flow characteristic curve, where the horizontal axis represents the actual flow command value and the vertical axis represents the target valve opening value. The corresponding target valve opening value can be determined on the curve based on the actual flow command value. Further, the valve opening of the non-test valve is adjusted to the target valve opening value. Here, during valve closing, the above calculations can be performed in real time to obtain the real-time target valve opening value. The non-test valve is then controlled to open based on this real-time target valve opening value, controlling it to open at a specific flow rate reduction speed.

[0037] The turbine valve testing method provided in this embodiment can calculate the flow reduction value of the test valve in real time, determine the theoretical flow compensation value corresponding to each non-test valve by combining the number of non-test valves, and then obtain the accurate actual flow compensation value by using a variable flow compensation coefficient matched with the flow of the test valve. This allows the non-test valves to increase their opening degree according to the actual flow compensation value to compensate for the flow loss during the flow reduction process of the test valve. Measurement and calculation errors are then corrected by the original power PID controller. The technical solution of this application achieves dynamic flow compensation by using non-test valves during the closing process of the test valve, without reducing the valve opening and closing rate or strengthening the PID controller, thus ensuring the load stability of the thermal power turbine unit, significantly shortening the test time for a single valve group, and significantly improving testing efficiency. Simultaneously, it can effectively suppress unit load fluctuations during the test process, avoid load regulation oscillations, reduce the dwell time of the thermal power turbine unit under abnormal operating conditions, reduce the risk of unit vibration and abnormal bearing temperature, and meet the needs of efficient and stable operation and maintenance of power plants.

[0038] In an optional embodiment, the method further includes: first, with the test valve closed, gradually increasing the valve opening of the test valve so that the valve flow rate of the test valve continuously increases at a flow adjustment rate until the valve flow rate of the test valve reaches the valve flow command value; then, determining in real time the flow increase value of the test valve during the valve flow rate increase process, and determining the theoretical value of flow offset for each non-test valve based on the flow increase value and the number of non-test valves; next, determining in real time the valve flow rate of the test valve, determining the variable flow compensation coefficient corresponding to the valve flow rate, and determining the actual value of flow offset for the non-test valves based on the variable flow compensation coefficient and the theoretical value of flow offset for the non-test valves; finally, based on the actual value of flow offset, reducing the valve flow rate of the non-test valves to offset the flow increase value of the test valve during the valve flow rate increase process.

[0039] The embodiments provided in this application, when restoring the test valve after it has been closed, can calculate the increase in flow rate of the test valve in real time, determine the theoretical value of flow offset by combining the number of non-test valves, and then accurately obtain the actual value of flow offset by using a variable flow compensation coefficient. This allows the non-test valves to synchronously reduce their flow rate to offset the flow increase of the test valve, achieving dynamic flow balance throughout the entire test process. Without adjusting the valve opening / closing rate and PID controller parameters, load fluctuations during the test valve recovery phase can be avoided, further shortening the overall test time and improving testing efficiency. Simultaneously, it reduces the duration of the unit's stay under abnormal operating conditions, lowers the risk of vibration and abnormal bearing temperature, and ensures the stability of the turbine during the entire test.

[0040] Furthermore, referring to Figure 3, the test procedure for the turbine valves is explained. The figure shows the control paths for the first and second regulating valves; the control paths for other regulating valves are not shown. Here, GV1 represents the first regulating valve, GV2 represents the second regulating valve, TV1 represents the first main valve, and TV2 represents the second main valve.

[0041] Further, taking the first regulating valve as the test valve and the second regulating valve as the non-test valve as an example: First, the flow adjustment rate is set to 0.5% / s, and the signals for "TV Test", "GV Hold", "TV1 Full-range Test", "GV2 Full-range Test", "TV2 Full-range Test" and "GV Hold" are 0, while the signals for "GV1 Full-range Test" and "GV Test Off" are 1. This allows the flow adjustment amount to gradually approach the specified valve flow value starting from 0 at the flow adjustment rate. In Figure 3, when the analog signal switching algorithm module receives signal 1 at its command value interface P, it obtains a signal from its first input terminal Y; when it receives signal 0 at its command value interface P, it obtains a signal from its second input terminal N. Further, n represents the number of non-test valves. Further, when the signal received at the first port P1 of the output speed controller algorithm module changes, the module will gradually adjust the original value of the port signal at the first port P1 before the change, using the flow adjustment rate received at the second port P2, and then output the adjusted signal through the third port P3 until the output signal reaches the target value of the signal at the first port P1 after the port change.

[0042] Furthermore, the real-time flow adjustment is subtracted from the specified valve flow rate to obtain the real-time flow command value of the test valve. Further, based on a preset valve flow characteristic curve, the target valve opening value corresponding to the real-time flow command value is determined, and the opening of the first regulating valve is controlled based on the target valve opening value to gradually reduce its valve flow rate until it drops to zero.

[0043] Furthermore, the difference between the specified valve flow rate and the valve flow rate of the first regulating valve is calculated in real time to obtain the flow reduction value. The flow reduction value is then divided by the number of non-test valves to obtain the corresponding theoretical flow compensation value for each non-test valve.

[0044] Furthermore, a preset mapping relationship between valve flow rate and variable flow compensation coefficient is obtained. Based on the real-time valve flow rate, the variable flow compensation coefficient F(x) corresponding to the valve flow rate is determined in the mapping relationship. The theoretical flow compensation value corresponding to the non-test valve is multiplied by this variable flow compensation coefficient F(x) to correct the theoretical flow compensation value, thus obtaining the actual flow compensation value for the non-test valve. Here, the actual flow compensation value obtained after correcting the theoretical flow compensation value is shown in Figure 4. Furthermore, as shown in Figure 3, the variable flow compensation coefficient F(x) can also be input based on a reserved interface.

[0045] Furthermore, the actual flow compensation value is added to the valve flow command value to obtain the actual flow command value for the non-test valves. Based on the valve flow characteristic curve, the target valve opening value corresponding to the actual flow command value is obtained. Then, based on the target valve opening value, the valve opening of each non-test valve is adjusted to gradually increase or decrease its valve flow rate for flow compensation. The process of gradually opening the test valves is similar to the above procedure and will not be elaborated here.

[0046] The turbine valve testing method provided in this embodiment introduces a flow balance mechanism to generate a test flow compensation mechanism during the full-stroke valve test. Then, the compensation flow of the regulating valve for the test is determined by a variable coefficient, thereby achieving precise optimization of the flow compensation effect. This results in faster valve regulation speed and smaller load deviation from the set value during the test, thus maintaining stable unit operation. At the same time, it allows for setting a faster valve test rate, so that the valve test rate is no longer limited by traditional rate constraints, improving valve testing efficiency.

[0047] Furthermore, as a specific implementation of the method shown in Figure 1, this embodiment provides a test device for a steam turbine valve, as shown in Figure 5. The device includes: an information acquisition module 51, a test execution module 52, a compensation calculation module 53, a compensation adjustment module 54, and an opening adjustment module 55.

[0048] The information acquisition module 51 can be used to acquire the valve flow command value for each turbine valve, identify the test valve and non-test valves among multiple turbine valves, and determine the number of non-test valves. The test execution module 52 can be used to gradually reduce the valve opening of the test valve, so that the valve flow of the test valve continuously decreases until the valve flow of the test valve drops to zero. The compensation calculation module 53 can be used to determine the flow reduction value of the test valve during the valve flow reduction process in real time, and determine the theoretical flow compensation value of each non-test valve based on the flow reduction value and the number of non-test valves. The compensation adjustment module 54 can be used to determine the valve flow of the test valve in real time, determine the variable flow compensation coefficient corresponding to the valve flow, and determine the actual flow compensation value of the non-test valve based on the variable flow compensation coefficient and the theoretical flow compensation value of the non-test valve. The opening adjustment module 55 can be used to increase the valve flow of the non-test valve based on the actual flow compensation value to compensate for the flow reduction value of the test valve during the valve flow reduction process.

[0049] In a specific application scenario, the test execution module 52 can be used to obtain a preset flow adjustment rate, gradually reduce the valve opening of the test valve, so that the valve flow of the test valve continues to decrease at the flow adjustment rate until the valve flow of the test valve drops to zero.

[0050] In specific application scenarios, the compensation calculation module 53 can be used to determine the valve flow rate of the test valve in real time during the valve flow rate reduction process; calculate the difference between the valve flow rate command value and the valve flow rate to obtain the flow rate reduction value.

[0051] In specific application scenarios, the test execution module 52 can be used to calculate the real-time flow command value of the test valve during the flow reduction process based on the flow adjustment rate and the valve flow command value; based on the preset valve opening and valve flow correspondence, match the target valve opening value corresponding to the real-time flow command value according to the real-time flow command value; and control the valve opening of the test valve to adjust to the target valve opening value.

[0052] In a specific application scenario, the opening adjustment module 55 can be used to sum the actual value of the flow compensation and the valve flow command value to obtain the actual value of the flow command; based on a preset correspondence between valve opening and valve flow, a target valve opening value corresponding to the actual value of the flow command is obtained by matching the actual value of the flow command; and the valve opening of the non-test valve is adjusted to the target valve opening value.

[0053] In a specific application scenario, the opening adjustment module 55 can be used to gradually increase the valve opening of the test valve when the test valve is closed, so that the valve flow rate of the test valve continuously increases at the flow rate adjustment rate until the valve flow rate of the test valve reaches the valve flow command value; determine the flow increase value of the test valve during the valve flow rate increase process in real time, and determine the theoretical value of flow offset for each non-test valve based on the flow increase value and the number of non-test valves; determine the valve flow rate of the test valve in real time, determine the variable flow compensation coefficient corresponding to the valve flow rate, and determine the actual value of flow offset for the non-test valves based on the variable flow compensation coefficient and the theoretical value of flow offset for the non-test valves; and reduce the valve flow rate of the non-test valves based on the actual value of flow offset to offset the flow increase value of the test valve during the valve flow rate increase process.

[0054] In specific application scenarios, the compensation adjustment module 54 can be used to obtain a preset mapping relationship between valve flow rate and variable flow rate compensation coefficient, and determine the variable flow rate compensation coefficient corresponding to the valve flow rate in the mapping relationship based on the real-time valve flow rate.

[0055] It should be noted that other corresponding descriptions of the functional units involved in the test device for a steam turbine valve provided in this embodiment can be found in the corresponding descriptions in Figure 1, and will not be repeated here.

[0056] Based on the method shown in Figure 1, this embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the test method for the turbine valve shown in Figure 1.

[0057] Based on this understanding, the technical solution of this application can be embodied in the form of a software product. The software product to be identified can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as an industrial controller, personal computer, server, or network device, etc.) to execute the methods described in the various implementation scenarios of this application.

[0058] Based on the method shown in Figure 1 and the turbine valve testing device embodiment shown in Figure 5, in order to achieve the above objectives, this embodiment also provides a computer device for testing turbine valves. Specifically, it can be an industrial controller, personal computer, server, smartphone, tablet computer, smartwatch, or other network device, etc. The computer device includes a storage medium and a processor; the storage medium is used to store computer programs and operating systems; the processor is used to execute computer programs to implement the methods shown in Figures 1 to 4.

[0059] Optionally, the computer device may also include internal memory, a communication interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, a display screen, and input devices such as a keyboard. The communication interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0060] Those skilled in the art will understand that the computer device structure for recognizing operational actions provided in this embodiment does not constitute a limitation on the computer device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0061] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the aforementioned computer hardware and the software resources to be identified, supporting the operation of information processing programs and other software and / or programs to be identified. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing computer device.

[0062] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware. By applying the technical solution of this application, firstly, the valve flow command value for each turbine valve is obtained, and test valves and non-test valves are identified among multiple turbine valves, and the number of non-test valves is determined; then, the valve opening of the test valve is gradually reduced, so that the valve flow of the test valve continues to decrease until the valve flow of the test valve drops to zero; then, the flow reduction value of the test valve during the valve flow reduction process is determined in real time, and based on the flow reduction value and the number of non-test valves, the theoretical value of flow compensation for each non-test valve is determined; further, the valve flow of the test valve is determined in real time, and the variable flow compensation coefficient corresponding to the valve flow is determined, and the actual value of flow compensation for the non-test valve is determined based on the variable flow compensation coefficient and the theoretical value of flow compensation for the non-test valve; finally, based on the actual value of flow compensation, the valve flow of the non-test valve is increased to compensate for the flow reduction value of the test valve during the valve flow reduction process. Compared with existing technologies, this may improve the efficiency of detecting turbine valves.

[0063] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0064] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A test method for a steam turbine valve, characterized in that, The method includes: acquiring a valve flow command value for each turbine valve, identifying test valves and non-test valves among multiple turbine valves, and determining the number of non-test valves; gradually reducing the valve opening of the test valves to continuously reduce the valve flow rate until the valve flow rate of the test valves drops to zero; determining the flow reduction value of the test valves during the flow reduction process in real time, and determining a theoretical flow compensation value for each non-test valve based on the flow reduction value and the number of non-test valves; determining the valve flow rate of the test valves in real time, determining a variable flow compensation coefficient corresponding to the valve flow rate, and determining an actual flow compensation value for the non-test valves based on the variable flow compensation coefficient and the theoretical flow compensation value of the non-test valves; and increasing the valve flow rate of the non-test valves based on the actual flow compensation value to compensate for the flow reduction value of the test valves during the flow reduction process.

2. The method according to claim 1, characterized in that, The step of gradually reducing the valve opening of the test valve to continuously reduce the valve flow rate includes: obtaining a preset flow adjustment rate, gradually reducing the valve opening of the test valve to continuously reduce the valve flow rate of the test valve at the flow adjustment rate until the valve flow rate of the test valve drops to zero.

3. The method according to claim 2, characterized in that, The real-time determination of the flow reduction value of the test valve during the valve flow reduction process includes: real-time determination of the valve flow rate of the test valve during the valve flow reduction process; and calculation of the difference between the valve flow command value and the valve flow rate to obtain the flow reduction value.

4. The method according to claim 2, characterized in that, The step of gradually reducing the valve opening of the test valve, causing the valve flow rate of the test valve to continuously decrease at the flow rate adjustment rate until the valve flow rate of the test valve drops to zero, includes: calculating the real-time flow command value of the test valve during the flow reduction process based on the flow rate adjustment rate and the valve flow command value; matching the real-time flow command value to obtain a target valve opening value corresponding to the real-time flow command value based on a preset valve opening and valve flow rate correspondence; and controlling the valve opening of the test valve to adjust to the target valve opening value.

5. The method according to claim 1, characterized in that, The step of increasing the valve flow rate of the non-test valve based on the actual flow compensation value includes: summing the actual flow compensation value and the valve flow command value to obtain the actual flow command value; matching the actual flow command value to obtain a target valve opening value corresponding to the actual flow command value based on a preset valve opening and valve flow rate relationship; and controlling the valve opening of the non-test valve to adjust to the target valve opening value.

6. The method according to any one of claims 2 to 5, characterized in that, The method further includes: with the test valve closed, gradually increasing the valve opening of the test valve, so that the valve flow rate of the test valve continuously increases at the flow rate adjustment rate until the valve flow rate of the test valve reaches the valve flow command value; determining the flow increase value of the test valve during the valve flow rate increase process in real time, and determining the theoretical flow offset value for each of the non-test valves based on the flow increase value and the number of non-test valves; determining the valve flow rate of the test valve in real time, determining the variable flow compensation coefficient corresponding to the valve flow rate, and determining the actual flow offset value of the non-test valves based on the variable flow compensation coefficient and the theoretical flow offset value of the non-test valves; and reducing the valve flow rate of the non-test valves based on the actual flow offset value to offset the flow increase value of the test valve during the valve flow rate increase process.

7. The method according to claim 1, characterized in that, The step of determining the variable flow compensation coefficient corresponding to the valve flow rate includes: obtaining a preset mapping relationship between valve flow rate and variable flow compensation coefficient, and determining the variable flow compensation coefficient corresponding to the valve flow rate in the mapping relationship based on the real-time valve flow rate.

8. A test apparatus for steam turbine valves, characterized in that, The device includes: an information acquisition module for acquiring valve flow command values ​​for each turbine valve, identifying test valves and non-test valves among multiple turbine valves, and determining the number of non-test valves; a test execution module for gradually reducing the valve opening of the test valve, causing the valve flow of the test valve to continuously decrease until the valve flow of the test valve drops to zero; a compensation calculation module for determining the flow reduction value of the test valve during the valve flow reduction process in real time, and determining the theoretical flow compensation value for each non-test valve based on the flow reduction value and the number of non-test valves; a compensation adjustment module for determining the valve flow of the test valve in real time, determining the variable flow compensation coefficient corresponding to the valve flow, and determining the actual flow compensation value of the non-test valve based on the variable flow compensation coefficient and the theoretical flow compensation value of the non-test valve; and an opening adjustment module for increasing the valve flow of the non-test valve based on the actual flow compensation value to compensate for the flow reduction value of the test valve during the valve flow reduction process.

9. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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