Valve regulation and control method and system for water supply regulating valve of marine nuclear power device
By real-time monitoring of water supply control parameters and the use of sliding film control algorithms and LSTM models to detect motor stall, the torque is automatically adjusted, solving the performance and safety problems caused by motor stall and achieving stable operation of the nuclear power plant.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-03-13
AI Technical Summary
Existing electric valve control methods are prone to motor stalling when the medium pressure fluctuates, affecting the overall performance and safety of nuclear power plants, and lack effective detection and alarm mechanisms.
By monitoring water supply control parameters in real time, adjusting torque using a sliding diaphragm control algorithm, detecting motor stall and outputting alarm information, until the water supply regulating valve reaches the target opening, and combining LSTM model prediction of stall and setting confidence threshold, automatic adjustment is achieved.
It improves the overall performance and safety of nuclear power plants, ensures the stable operation of the water supply system, and reduces the risk of human intervention and equipment damage.
Smart Images
Figure CN121657433A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ship control technology, and in particular to a valve control method and system for a feedwater regulating valve of a marine nuclear power plant. Background Technology
[0002] In marine nuclear power plants, feedwater regulating valves are valves used to control fluid flow. They automatically adjust the valve opening size according to user needs or system operating conditions, thereby controlling the output water flow. Therefore, the normal operation of feedwater regulating valves is crucial for maintaining system stability and safety.
[0003] However, existing electric valve control methods have some technical bottlenecks. On the one hand, to balance energy consumption and equipment lifespan, the electric actuator is usually set to 70% to 80% of its maximum torque. While this setting can reduce energy consumption to some extent, when the medium pressure fluctuates significantly, the default torque of the electric actuator may be insufficient to drive the feedwater regulating valve, leading to motor stall. On the other hand, existing automatic control methods lack effective detection and alarm mechanisms for motor stall, failing to promptly identify stall signals and notify operators. Once stall occurs, automatic recovery is not possible, requiring manual adjustment of torque and control targets. This not only increases the workload of operators but may also lead to prolonged deviations from normal operating conditions, affecting the overall performance and safety of the nuclear power plant. Summary of the Invention
[0004] This invention provides a valve control method and system for a feedwater regulating valve of a marine nuclear power plant, which solves the technical problem in the prior art where, in order to balance energy consumption and equipment lifespan, the electric motor is usually set to 70% to 80% of the maximum torque, which can easily lead to motor stall when the medium pressure fluctuates greatly, thus affecting the overall performance and safety of the nuclear power plant.
[0005] This invention provides a valve control method for a feedwater regulating valve of a marine nuclear power plant, comprising the following steps: Real-time monitoring of water supply control parameters; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree; If motor stall is detected based on the water supply control parameters, a corresponding alarm message is output, and the torque is adjusted through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0006] According to the present invention, a valve control method for a feedwater regulating valve of a marine nuclear power plant, wherein adjusting the torque through a sliding diaphragm control algorithm until the feedwater regulating valve reaches a target opening degree includes: Adjust the torque and determine the error between the actual state and the desired state of the adjusted water supply regulating valve; Update the sliding surface based on the error; Based on the updated sign of the sliding surface, the torque is adjusted using the control law corresponding to the sliding surface until the water supply regulating valve reaches the target opening degree.
[0007] A valve control method for a feedwater regulating valve of a marine nuclear power plant according to the present invention further includes: Dynamic modeling of the water supply regulating valve is performed to obtain the dynamic model; Determine the control objective corresponding to the water supply regulating valve; the control objective includes the opening degree of the water supply regulating valve and the corresponding opening degree regulation speed of the water supply regulating valve. Based on the error function corresponding to the control target, a sliding surface is set; Based on the sliding surface and the dynamic model, a control law corresponding to the sliding surface is set.
[0008] According to the present invention, a valve control method for a feedwater regulating valve of a marine nuclear power plant, based on the detection of motor stall based on the feedwater control parameters, includes: The water supply control parameters are input into the target LSTM model to obtain the motor stall prediction results output by the target LSTM model; Based on the motor stall prediction results, determine whether the motor is stalled; The target LSTM model is obtained by training the initial LSTM model with the control sample parameters of the water supply system carrying motor stall labels.
[0009] According to the present invention, a valve control method for a feedwater regulating valve of a marine nuclear power plant, based on the motor stall prediction result, determines whether the motor is stalled, including: Determine the stall confidence level corresponding to the motor stall prediction result; If the stall confidence level is greater than the confidence threshold, the motor is determined to be stalled.
[0010] A valve control method for a feedwater regulating valve of a marine nuclear power plant according to the present invention further includes: If the water supply regulating valve reaches the target opening degree, the process will continue to return to real-time monitoring of the water supply control parameters; If motor stall is detected based on the water supply control parameters, the corresponding alarm information will continue to be output, and the torque will be adjusted through the sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0011] The present invention also provides a valve control system for a feedwater regulating valve of a marine nuclear power plant, comprising: The first valve control module is used to monitor water supply control parameters in real time; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree. The second valve control module is used to output corresponding alarm information when motor stall is detected based on the water supply control parameters, and to adjust the torque through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0012] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the program to implement the valve control method for the feedwater regulating valve of a marine nuclear power plant as described in any of the above embodiments.
[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a valve control method for a feedwater regulating valve of a marine nuclear power plant as described in any of the above embodiments.
[0014] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements a valve control method for a feedwater regulating valve of a marine nuclear power plant as described above.
[0015] The valve control method and system for feedwater regulating valves in marine nuclear power plants provided by this invention detects motor stall by real-time monitoring of feedwater control parameters. Upon detecting motor stall based on these parameters, the system promptly outputs corresponding alarm information and adjusts the torque using a sliding diaphragm control algorithm until the feedwater regulating valve reaches the target opening. This real-time detection of motor stall and automatic torque adjustment improves the overall performance and safety of the nuclear power plant. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic flowchart of the valve control method for the feedwater regulating valve of a marine nuclear power plant provided by the present invention.
[0018] Figure 2 This is a schematic diagram of the valve control system of the feedwater regulating valve for a marine nuclear power plant provided by the present invention.
[0019] Figure 3This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0021] It should be noted that in the description of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0022] The terms "first," "second," etc., used in this invention are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0023] The following is combined with Figures 1-3 This invention describes a valve control method and system for a feedwater regulating valve in a marine nuclear power plant.
[0024] The valve control method for the feedwater regulating valve of a marine nuclear power plant according to an embodiment of the present invention, such as... Figure 1 As shown, it includes steps 110 and 120.
[0025] Step 110: Monitor water supply control parameters in real time; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree.
[0026] Evaporator water level refers to the height of the water level inside the evaporator, and it is an important parameter to ensure the normal operation of the evaporator. If the water level is too high, it may cause water to overflow or affect the quality of steam; if the water level is too low, it may cause the evaporator to dry out and damage the equipment.
[0027] A feedwater regulating valve is used to control the amount of water entering the evaporator. The control opening of the feedwater regulating valve refers to the theoretical opening that the valve should achieve, calculated by the controller based on the set target water level or steam demand. For example, if the water flow needs to be increased, the control opening will increase; if the water flow needs to be decreased, the control opening will decrease. The feedback opening of the feedwater regulating valve refers to the actual measured opening of the valve.
[0028] In this embodiment, the above three key parameters are set to ensure the normal operation of the water supply system. Specifically, the evaporator water level, the control opening of the water supply regulating valve, and the feedback opening of the water supply regulating valve are monitored in real time by sensors or other measuring devices to perform subsequent valve regulation of the water supply regulating valve.
[0029] Step 120: If motor stall is detected based on the water supply control parameters, output the corresponding alarm information and adjust the torque through the sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0030] Here, "motor stall" refers to a situation where the motor cannot rotate normally during operation due to some reason (such as excessive load), but current still flows through it.
[0031] In this embodiment, when a motor stall is detected, an alarm message is output to prompt relevant personnel to take timely measures. Here, the alarm message can be an audible and visual alarm, a screen notification, or a message sent to the relevant personnel's terminal via a network; there are no limitations on this.
[0032] In this step, it is possible to determine whether the motor is stalled by monitoring water supply control parameters (such as evaporator water level and the opening of the water supply regulating valve) and combining them with the motor's operating status (such as current and speed). Alternatively, it is possible to predict and assess whether the motor is stalled by monitoring water supply control parameters (such as evaporator water level and the opening of the water supply regulating valve) and combining them with a deep learning model.
[0033] After detecting motor stall based on water supply control parameters, a sliding diaphragm control algorithm is used to adjust the motor torque. This algorithm can quickly calculate the magnitude and direction of the required torque adjustment based on the motor's current and target states. By adjusting the torque, the motor stall is relieved, allowing it to resume normal rotation.
[0034] Here, sliding mode control is a nonlinear control method. Its principle is to design a sliding surface, allowing the system state to slide along this surface, thereby achieving rapid and accurate control of the system. Torque refers to the control input acting on the feedwater regulating valve. The target opening degree is preset according to system requirements (such as evaporator water level, steam demand, etc.). By adjusting the opening degree of the feedwater regulating valve, the normal operation of the feedwater system can be ensured, meeting the system's water demand.
[0035] The valve control method for the feedwater regulating valve of the marine nuclear power plant in this embodiment detects motor stall by real-time monitoring of feedwater control parameters. If motor stall is detected based on the feedwater control parameters, a corresponding alarm message is output promptly, and the torque is adjusted using a sliding diaphragm control algorithm until the feedwater regulating valve reaches the target opening. This real-time detection of motor stall and automatic torque adjustment improves the overall performance and safety of the nuclear power plant.
[0036] It should be noted that each implementation method of this application can be freely combined, rearranged, or executed individually, and does not need to rely on or depend on a fixed execution order.
[0037] In some embodiments, adjusting the torque via a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening includes: Adjust the torque and determine the error between the actual state and the desired state of the adjusted water supply regulating valve; Update the sliding surface based on the error; Based on the updated sign of the sliding surface, the torque is adjusted using the control law corresponding to the sliding surface until the water supply regulating valve reaches the target opening degree.
[0038] In this step, based on the initial control strategy or feedforward control, a torque is first applied to the feedwater regulating valve. Then, the actual state of the adjusted feedwater regulating valve is measured and compared with the desired state, calculating the error between the actual and desired states. For example, the actual opening degree of the feedwater regulating valve is measured, and the error between this and the desired opening degree is calculated. The magnitude and direction of the error reflect the degree to which the actual state deviates from the desired state.
[0039] In one example, the state of the water supply regulating valve includes the valve's opening degree and the valve's opening adjustment speed. Therefore, the error between the actual state and the desired state of the water supply regulating valve includes the error e1(t) between the actual opening degree and the desired opening degree and the error e2(t) between the actual opening adjustment speed and the desired opening adjustment speed.
[0040] It should be understood that the sliding surface is the core component of the sliding mode control algorithm, defining the desired trajectory of the system state. Based on the calculated error, the sliding surface is updated. The purpose of this update is to ensure that the sliding surface better reflects the current state of the system and guides the system state to converge to the desired value more quickly.
[0041] Typically, the sliding surface is a linear or nonlinear function, such as the sliding surface... Here, These are pre-set standard parameters. The sliding surface is determined by errors e1(t) and e2(t). It can be dynamically adjusted to adapt to real-time changes in the system.
[0042] The sign (positive or negative) of the sliding surface is used to determine whether the actual state has approached or reached the desired trajectory. For example, if the sliding surface... This indicates that the actual state is greater than the expected state; if the sliding surface... This indicates that the actual state is less than the desired state. If the sliding surface... This indicates that the actual state is the same as the expected state.
[0043] Depending on the sign of the sliding surface, the sliding mode control algorithm adjusts the torque through a control law. The control law is typically designed to include a switching term to quickly switch the system state along the sliding surface.
[0044] In one example, the control law can be expressed as ,in, For feedforward control input based on sliding diaphragm control, This is the feedback control input based on sliding diaphragm control. Therefore, the control law can be expressed as .in, is the sign function, and k is the preset switching gain.
[0045] By continuously adjusting the torque, the system state will gradually approach the sliding surface and eventually slide on it. When the error between the actual opening degree and the target opening degree of the water supply regulating valve is small enough or the preset convergence condition is met, the system considers that the regulating valve has reached the target opening degree, and the control process ends.
[0046] In some embodiments, it also includes: Dynamic modeling of the water supply regulating valve is performed to obtain the dynamic model; Determine the control objective corresponding to the water supply regulating valve; the control objective includes the opening degree of the water supply regulating valve and the corresponding opening degree regulation speed of the water supply regulating valve. Based on the error function corresponding to the control target, a sliding surface is set; Based on the sliding surface and the dynamic model, a control law corresponding to the sliding surface is set.
[0047] It should be understood that dynamic modeling describes the dynamic behavior of a water supply regulating valve through mathematical methods, that is, how it responds to external inputs (such as control signals) and changes in its internal state.
[0048] In this embodiment, the dynamic model is based on the following formula: ; in, The acceleration for adjusting the opening of the water supply regulating valve, The inertia matrix, The Cocteau force matrix, For gravitational torque, To control the input torque. In addition, To adjust the opening of the water supply regulating valve, The opening speed of the water supply regulating valve is adjusted.
[0049] Next, the control target is determined to be the opening degree of the water supply regulating valve. Adjustment speed of water supply regulating valve opening Therefore, the error function corresponding to the control objective is defined as follows: ; Furthermore, a sliding surface is set. Here, These are the pre-set standard parameters.
[0050] Based on this, the control law can be expressed as: ,in, For feedforward control input based on sliding diaphragm control, This is the feedback control input based on sliding diaphragm control. Therefore, the control law can be expressed as .in, For symbolic functions, It is a pre-set switching gain.
[0051] Furthermore, to ensure the stability of the system, this embodiment also verifies the accessibility of the sliding surface and the stability of the synovial motion.
[0052] Specifically, the accessibility of the sliding surface can be guaranteed by the following conditions: ; By designing control laws, ensure symbols and The signs are opposite, thus making It approaches zero within a finite amount of time.
[0053] Once the system reaches the sliding surface The system will slide along the sliding surface. At this time, the stability of the synovial motion can be improved by selecting appropriate parameters. To guarantee.
[0054] Based on this, this embodiment assumes that the system has unknown disturbances, therefore the control law... It can be designed as follows: By choosing an appropriate value for k, it can be ensured that the system remains stable even in the presence of disturbances.
[0055] The valve control method for the feedwater regulating valve of the marine nuclear power plant in this embodiment, by calculating errors, updating the sliding surface, and adjusting the torque according to the sign change of the sliding surface, the sliding mode control algorithm can quickly and accurately guide the actual state of the feedwater regulating valve to the desired state.
[0056] In some embodiments, detecting motor stall based on the water supply control parameters includes: The water supply control parameters are input into the target LSTM model to obtain the motor stall prediction results output by the target LSTM model; Based on the motor stall prediction results, determine whether the motor is stalled; The target LSTM model is obtained by training the initial LSTM model with the control sample parameters of the water supply system carrying motor stall labels.
[0057] In this embodiment, the target LSTM model is trained using the control sample parameters of the water supply system carrying motor stall tags. Then, the target LSTM model is used to predict motor stall based on the water supply control parameters.
[0058] In practical applications, actual water level data from the steam generator, control opening of the feedwater regulating valve, and feedback opening of the feedwater regulating valve are collected, and the data are labeled according to the corresponding conditions (whether stalling has occurred). Then, the data on steam generator water level and whether stalling has occurred are normalized. For a test dataset with a duration of n seconds, the data can be sequentially organized into n-4 data samples of length 5. These data are assigned n-4 labels. The data are randomly divided into training and validation sets in a 7:3 ratio. An initial LSTM model is trained using the training set, and the trained LSTM model is validated using the validation set. Finally, the validated LSTM model is used as the target LSTM model.
[0059] In some embodiments, determining whether the motor is stalled based on the motor stall prediction result includes: Determine the stall confidence level corresponding to the motor stall prediction result; If the stall confidence level is greater than the confidence threshold, the motor is determined to be stalled.
[0060] Here, the stall confidence level is a value between 0 and 1, representing the reliability of the motor stall prediction result. For example, if the confidence level is 0.9, it means that the system is 90% confident that the motor has stalled; if the confidence level is 0.1, it means that the system is only 10% confident that the motor has stalled.
[0061] In this step, the predicted stall confidence level is compared with a pre-set confidence threshold. If the stall confidence level is greater than the threshold, the system considers stall to have occurred and triggers corresponding alarms or protective measures. If the stall confidence level is less than or equal to the threshold, the system considers that the motor has not stalled, or that the probability of stalling is insufficient to take action. The system may continue to monitor the motor's operating status or record data for subsequent analysis.
[0062] The valve control method for the feedwater regulating valve of the marine nuclear power plant in this embodiment effectively improves the accuracy and reliability of stall detection by using confidence level and threshold, and avoids false alarms and missed alarms.
[0063] In some embodiments, it also includes: If the water supply regulating valve reaches the target opening degree, the process will continue to return to real-time monitoring of the water supply control parameters; If motor stall is detected based on the water supply control parameters, the corresponding alarm information will continue to be output, and the torque will be adjusted through the sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0064] In the control system of the feedwater regulating valve, the system monitors the feedwater control parameters (such as the evaporator water level and the opening degree of the feedwater regulating valve) in real time. When the feedwater regulating valve successfully reaches the set target opening degree, the system does not stop running, but continues to perform the operation of monitoring the feedwater control parameters in real time.
[0065] Meanwhile, the system continuously monitors for motor stall during the monitoring process. If motor stall is detected based on water supply control parameters (such as abnormal increase in motor current, decrease in speed, etc.), the system will immediately execute the corresponding alarm operation, remind relevant personnel, and adjust the motor torque through the sliding mode control algorithm.
[0066] The valve control method for the feedwater regulating valve of the marine nuclear power plant in this embodiment involves continuous monitoring, real-time feedback, and dynamic adjustment. Monitoring does not stop after the feedwater regulating valve reaches the target opening; instead, the system status continues to be monitored to ensure stable operation. If any abnormalities such as motor stall are detected, the system will quickly take measures, adjusting the torque through a sliding mode control algorithm until the regulating valve reaches the target opening again, thereby ensuring the safe, stable, and efficient operation of the entire feedwater system.
[0067] The valve control system of the feedwater regulating valve for a marine nuclear power plant provided by the present invention will be described below. The valve control system of the feedwater regulating valve for a marine nuclear power plant described below can be referred to in correspondence with the valve control method of the feedwater regulating valve for a marine nuclear power plant described above.
[0068] The valve control system of the feedwater regulating valve for a marine nuclear power plant according to an embodiment of the present invention, such as... Figure 2 As shown, it includes the following modules: a first valve control module 210 and a second valve control module 220.
[0069] The first valve control module 210 is used to monitor water supply control parameters in real time; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree and water supply regulating valve feedback opening degree. The second valve control module 220, when detecting motor stall based on the water supply control parameters, outputs corresponding alarm information and adjusts the torque through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0070] The valve control system of the feedwater regulating valve of the marine nuclear power plant in this embodiment detects whether the motor is stalled by monitoring the feedwater control parameters in real time. When motor stall is detected based on the feedwater control parameters, the system promptly outputs corresponding alarm information and adjusts the torque through a sliding diaphragm control algorithm until the feedwater regulating valve reaches the target opening. This real-time detection of motor stall and automatic torque adjustment improves the overall performance and safety of the nuclear power plant.
[0071] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3 As shown, the electronic device may include: a processor 310, a communications interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communications interface 320, and the memory 330 communicate with each other via the communication bus 340. The processor 310 can call logical instructions from the memory 330 to execute a valve control method for the feedwater regulating valve of a marine nuclear power plant, the method including: Real-time monitoring of water supply control parameters; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree; If motor stall is detected based on the water supply control parameters, a corresponding alarm message is output, and the torque is adjusted through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0072] Furthermore, the logical instructions in the aforementioned memory 330 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, etc., media capable of storing program code.
[0073] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program that can be stored on a non-transitory computer-readable storage medium, wherein when the computer program is executed by a processor, the computer is capable of executing the valve control method for the feedwater regulating valve of a marine nuclear power plant provided by each of the above methods, the method comprising: Real-time monitoring of water supply control parameters; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree; If motor stall is detected based on the water supply control parameters, a corresponding alarm message is output, and the torque is adjusted through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0074] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a valve control method for a feedwater regulating valve of a marine nuclear power plant provided by each of the above methods, the method comprising: Real-time monitoring of water supply control parameters; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree; If motor stall is detected based on the water supply control parameters, a corresponding alarm message is output, and the torque is adjusted through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
[0075] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. 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. Those skilled in the art can understand and implement this without any creative effort.
[0076] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.
[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in each of the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.
Claims
1. A valve control method for a feedwater regulating valve of a marine nuclear power plant, characterized in that, include: Real-time monitoring of water supply control parameters; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree; If motor stall is detected based on the water supply control parameters, a corresponding alarm message is output, and the torque is adjusted through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
2. The valve control method for the feedwater regulating valve of a marine nuclear power plant according to claim 1, characterized in that, The process of adjusting the torque through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening includes: Adjust the torque and determine the error between the actual state and the desired state of the adjusted water supply regulating valve; Update the sliding surface based on the error; Based on the updated sign of the sliding surface, the torque is adjusted using the control law corresponding to the sliding surface until the water supply regulating valve reaches the target opening degree.
3. The valve control method for the feedwater regulating valve of a marine nuclear power plant according to claim 2, characterized in that, Also includes: Dynamic modeling of the water supply regulating valve is performed to obtain the dynamic model; Determine the control objective corresponding to the water supply regulating valve; the control objective includes the opening degree of the water supply regulating valve and the corresponding opening degree regulation speed of the water supply regulating valve. Based on the error function corresponding to the control target, a sliding surface is set; Based on the sliding surface and the dynamic model, a control law corresponding to the sliding surface is set.
4. The valve control method for the feedwater regulating valve of a marine nuclear power plant according to claim 1, characterized in that, Based on the detection of motor stall based on the aforementioned water supply control parameters, the following is included: The water supply control parameters are input into the target LSTM model to obtain the motor stall prediction results output by the target LSTM model; Based on the motor stall prediction results, determine whether the motor is stalled; The target LSTM model is obtained by training the initial LSTM model with the control sample parameters of the water supply system carrying motor stall labels.
5. The valve control method for the feedwater regulating valve of a marine nuclear power plant according to claim 4, characterized in that, Based on the motor stall prediction results, determining whether the motor is stalled includes: Determine the stall confidence level corresponding to the motor stall prediction result; If the stall confidence level is greater than the confidence threshold, the motor is determined to be stalled.
6. The valve control method for the feedwater regulating valve of a marine nuclear power plant according to any one of claims 1 to 5, characterized in that, Also includes: If the water supply regulating valve reaches the target opening degree, the process will continue to return to real-time monitoring of the water supply control parameters; If motor stall is detected based on the water supply control parameters, the corresponding alarm information will continue to be output, and the torque will be adjusted through the sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
7. A valve control system for a feedwater regulating valve of a marine nuclear power plant, characterized in that, include: The first valve control module is used to monitor water supply control parameters in real time; the water supply control parameters include evaporator water level, water supply regulating valve control opening degree, and water supply regulating valve feedback opening degree. The second valve control module is used to output corresponding alarm information when motor stall is detected based on the water supply control parameters, and adjust the torque through a sliding diaphragm control algorithm until the water supply regulating valve reaches the target opening degree.
8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the valve control method for the feedwater regulating valve of a marine nuclear power plant as described in any one of claims 1 to 6.
9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the valve control method for the feedwater regulating valve of a marine nuclear power plant as described in any one of claims 1 to 6.
10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the valve control method for the feedwater regulating valve of a marine nuclear power plant as described in any one of claims 1 to 6.