Fault processing method and system for high-pressure water supply regulating valve of gas turbine unit and computer equipment

Abstract

The invention relates to a fault processing method and system for a high-pressure water supply regulating valve of a gas turbine unit and computer equipment. The fault processing method comprises the steps that the water level of a high-pressure water supply steam pocket, the high-pressure water supply flow, a high-pressure water supply regulating valve instruction and high-pressure water supply regulating valve feedback information related to a high-pressure water supply 100% regulating valve are monitored; when it is monitored that the running state data meet the abnormal working condition judgment condition, a fault alarm signal for the high-pressure water supply 100% adjusting valve is generated, the high-pressure water supply 100% adjusting valve is switched to a manual mode, the high-pressure water supply 30% adjusting valve is switched to an automatic mode, and the water level of the high-pressure water supply steam pocket is adjusted; and after the equipment fault is eliminated, responding to the operation of putting the high-pressure water supply 100% regulating valve into the automatic mode, switching the high-pressure water supply 100% regulating valve into the automatic mode, and controlling the high-pressure water supply 30% regulating valve to be closed. Therefore, the fault processing stability of the high-pressure water supply 100% regulating valve can be improved.

Description

Technical Field

[0001] This application relates to the field of automatic control technology for gas turbine power plants, and in particular to a method, system and computer equipment for handling faults in the high-pressure feedwater regulating valve of a gas turbine unit. Background Technology

[0002] In the field of industrial process control, control valves are key final control components for changing process parameters such as flow rate and pressure of media in industrial automation process control. Their failure can cause serious harm to enterprises, and preventive maintenance and automatic fault handling need to be achieved through effective monitoring and detection.

[0003] As industrial sites place increasingly higher demands on equipment reliability, especially in critical processes such as high-pressure water supply systems, valve failures can trigger chain reactions such as abnormal steam drum water levels, and even lead to unplanned shutdowns.

[0004] After in-depth research, the applicant discovered that existing high-pressure feedwater regulating valves in waste heat boilers of gas turbine units present a cumbersome and unstable problem requiring manual adjustment after malfunction. Malfunctions of high-pressure feedwater regulating valves (such as jamming, leakage, or failure to operate) can easily lead to production fluctuations or even unplanned shutdowns. For example, problems such as valve core jamming or valve stem breakage can cause abnormal water levels in the steam drum, requiring emergency shutdowns and severely impacting the safe and stable operation of the system. Therefore, there is an urgent need for a fault diagnosis and self-processing system that is simple in structure, requires low investment, is highly versatile, and easy to operate to overcome the shortcomings of existing technologies. Summary of the Invention

[0005] Based on this, the purpose of this application is to at least solve one of the above-mentioned technical defects, especially the technical defect of instability after the high-pressure water supply 100% regulating valve fails in the prior art. This application provides a method, system and computer equipment for handling high-pressure water supply regulating valve failures in gas turbine units.

[0006] Firstly, this application provides a method for handling faults in the high-pressure feedwater regulating valve of a gas turbine unit, the method comprising:

[0007] Monitor the operating status data associated with the 100% high-pressure feedwater regulating valve. The operating status data includes information such as the high-pressure feedwater drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback.

[0008] If the monitored operating status data meets the abnormal operating condition judgment conditions, a fault alarm signal is generated for the 100% high-pressure water supply regulating valve, and the 100% high-pressure water supply regulating valve is switched to manual mode, and the 30% high-pressure water supply regulating valve is switched to automatic mode to adjust the water level of the high-pressure water supply steam drum.

[0009] Once the equipment malfunction is resolved, in response to the operation of putting the 100% high-pressure water supply regulating valve into automatic mode, the 100% high-pressure water supply regulating valve will be switched to automatic mode, and the 30% high-pressure water supply regulating valve will be closed.

[0010] In one embodiment, when the operating status data is detected to meet the abnormal operating condition judgment conditions, the method further includes:

[0011] Based on the opening degree of the 30% pneumatic regulating valve, adjust the pressure setting value of the high-pressure feed water pump frequency converter to ensure the reasonable adjustment range of the 30% pneumatic regulating valve.

[0012] In one embodiment, switching the 100% high-pressure water supply regulating valve to automatic mode and controlling the 30% high-pressure water supply regulating valve to close includes:

[0013] When the water level in the high-pressure feedwater steam drum meets the preset water level range, a water level regulation signal is generated for the high-pressure feedwater 100% regulating valve to control the high-pressure feedwater 100% regulating valve to regulate the water level.

[0014] Adjust the water level setting of the 30% high-pressure water supply regulating valve to the preset water level reduction value so that the 30% high-pressure water supply regulating valve gradually closes during the regulation process.

[0015] In one embodiment, after switching the 100% high-pressure water supply regulating valve to automatic mode and controlling the 30% high-pressure water supply regulating valve to close, the method further includes:

[0016] Based on the opening degree of the 100% pneumatic regulating valve, the pressure setting value of the high-pressure feed water pump frequency converter is corrected to ensure the reasonable adjustment range of the 100% pneumatic regulating valve.

[0017] In one embodiment, the method further includes:

[0018] The fault status of the 100% high-pressure water supply regulating valve is recorded using an RS trigger.

[0019] Under the condition that the reset condition of the RS trigger is met, the fault state of the 100% high-pressure water supply regulating valve is cleared; the reset condition includes the 100% high-pressure water supply regulating valve exiting the fault self-recovery and the opening degree of the 30% high-pressure water supply regulating valve being less than the preset opening degree.

[0020] In one embodiment, when the monitored operating status data meets abnormal operating conditions, a fault alarm signal is generated for the 100% high-pressure water supply regulating valve, and the method further includes:

[0021] If the high-pressure feedwater 100% regulating valve is in automatic mode, the gas turbine unit is in operation, there is no sudden load change in the gas turbine unit, and there is no sudden pressure change in the high-pressure steam drum, then a fault alarm signal for the high-pressure feedwater 100% regulating valve will be generated if the monitored operating status data meets the abnormal operating conditions.

[0022] In one embodiment, the method further includes:

[0023] If the deviation between the feedback information of the high-pressure water supply regulating valve and the command of the high-pressure water supply regulating valve is greater than the preset deviation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0024] If the fluctuation value of the high-pressure water supply flow rate within a preset time is greater than the preset flow fluctuation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0025] If the electric valve of the high-pressure evaporator's periodic drain pipe is closed and the fluctuation of the high-pressure feedwater steam drum water level is greater than the preset water level fluctuation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0026] If the high-pressure water supply regulating valve command indicates that the opening degree of the high-pressure water supply regulating valve is within the preset opening degree range, and the change in the high-pressure water supply regulating valve command is greater than the preset change threshold, then the operating status data is determined to meet the abnormal operating condition conditions.

[0027] Secondly, this application provides a fault handling system for a high-pressure feedwater regulating valve of a gas turbine unit, the device comprising:

[0028] The status monitoring module is used to monitor the operating status data associated with the high-pressure feedwater 100% regulating valve. The operating status data includes the high-pressure feedwater steam drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback information.

[0029] The mode switching module is used to generate a fault alarm signal for the 100% high-pressure feedwater regulating valve when the monitored operating status data meets the abnormal operating condition judgment conditions, and to switch the 100% high-pressure feedwater regulating valve to manual mode and the 30% high-pressure feedwater regulating valve to automatic mode to adjust the water level of the high-pressure feedwater steam drum.

[0030] The automatic mode recovery module is used to switch the 100% high-pressure water supply regulating valve to automatic mode and control the 30% high-pressure water supply regulating valve to close after the equipment fault is cleared.

[0031] Thirdly, this application provides a computer device including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0032] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0033] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0034] The high-pressure feedwater regulating valve fault handling method, system, and computer equipment provided in this application for gas turbine units monitor the operating status data associated with the 100% high-pressure feedwater regulating valve. This operating status data includes the high-pressure feedwater drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback information. This enables real-time monitoring and comprehensive evaluation of the regulating valve's operating status, providing accurate data support for fault diagnosis. When the monitored operating status data meets the abnormal operating condition judgment criteria, a fault alarm signal is generated for the 100% high-pressure feedwater regulating valve, and the valve is switched to manual mode. Additionally, the high-pressure feedwater 30... Switching the % regulating valve to automatic mode to adjust the high-pressure feedwater drum water level can quickly trigger the fault response mechanism. Seamless replacement of the regulating function is achieved through mode switching, preventing system fluctuations caused by single-valve failures. After the equipment fault is cleared, in response to the operation of putting the 100% high-pressure feedwater regulating valve into automatic mode, the 100% high-pressure feedwater regulating valve is switched to automatic mode, and the 30% high-pressure feedwater regulating valve is closed. This enables automatic system reset after fault clearance, ensuring orderly switching of the dual-valve regulating logic and stable transition of unit operating parameters. This improves the stability of handling faults in the 100% high-pressure feedwater regulating valve and reduces the tediousness of manual adjustment. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A process flow diagram of a high-pressure feedwater system for a waste heat boiler in a gas turbine unit is provided for embodiments of this application.

[0037] Figure 2 A flowchart illustrating a method for handling faults in a high-pressure feedwater regulating valve of a gas turbine unit, provided in an embodiment of this application;

[0038] Figure 3 A schematic diagram of a fault alarm signal for a high-pressure feedwater 100% regulating valve of a gas turbine unit provided in this application embodiment;

[0039] Figure 4 This application provides a schematic diagram of the fault self-handling logic for a 100% high-pressure feedwater regulating valve of a gas turbine unit.

[0040] Figure 5 This is a schematic diagram of the pressure setpoint circuit for the frequency conversion regulation of the high-pressure feedwater pump provided in an embodiment of this application;

[0041] Figure 6 A schematic diagram of a high-pressure feedwater regulating valve fault handling system for a gas turbine unit provided in this application embodiment;

[0042] Figure 7 This is a schematic diagram of the internal structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Figure 1 A process flow diagram of a high-pressure feedwater system for a waste heat boiler in a gas turbine unit, as provided in this application embodiment, is shown below. Figure 1 As shown, the high-pressure feedwater pump frequency converter controls the pumping of water from the low-pressure steam drum to the high-pressure steam drum via the high-pressure feedwater 100% regulating valve and the high-pressure feedwater 30% regulating valve. During normal load regulation of the unit, the high-pressure feedwater 30% regulating valve is closed, and the high-pressure feedwater 100% regulating valve regulates the water flow rate to control the water level in the high-pressure steam drum. The high-pressure frequency converter controls the outlet pressure of the high-pressure feedwater system.

[0045] Control valves are critical final control components in industrial automation process control, altering process parameters such as flow rate and pressure. Their malfunctions can cause serious harm to enterprises, necessitating effective monitoring and detection for preventative maintenance and automated fault handling. Existing technologies primarily employ intelligent positioners for performance and fault diagnosis, but these suffer from high investment costs and poor versatility. Furthermore, malfunctions in high-pressure feedwater control valves (such as jamming, leakage, and operational failure) can easily lead to water level fluctuations or even unplanned shutdowns. For instance, valve core jamming or valve stem breakage can cause abnormal water levels in the steam drum, requiring emergency shutdowns and severely impacting the safe and stable operation of the system. Therefore, there is an urgent need for a fault diagnosis and self-handling system that is simple in structure, requires low investment, is highly versatile, and easy to operate to overcome the shortcomings of existing technologies.

[0046] In one exemplary embodiment, Figure 2This application provides a flowchart illustrating a method for handling faults in a high-pressure feedwater regulating valve of a gas turbine unit. Figure 2 As shown, a method for handling faults in the high-pressure feedwater 100% regulating valve of a gas turbine unit is provided. This method is illustrated using a terminal as an example. It is understood that this method can also be applied to a server, and to a system including both a terminal and a server, and is implemented through interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, and tablets. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. In this embodiment, the method includes the following steps S201 to S203: Wherein:

[0047] S201. Monitor the operating status data associated with the 100% high-pressure feedwater regulating valve. The operating status data includes the high-pressure feedwater drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback information.

[0048] Among them, the high-pressure feedwater 100% regulating valve refers to the regulating valve used for main feedwater control in the waste heat boiler system of the gas turbine unit. It usually has full flow regulation capability and is responsible for maintaining the stability of the high-pressure steam drum water level. Operating status data refers to the set of physical quantities reflecting the real-time operating conditions of the feedwater system. The high-pressure feedwater steam drum water level represents the real-time measured value of the water level in the high-pressure steam drum and is a key parameter for feedwater control. The high-pressure feedwater flow rate refers to the instantaneous flow rate through the feedwater pipeline, used to assess the load status of the feedwater system. The high-pressure feedwater regulating valve command refers to the opening control signal sent by the control system to the regulating valve. The high-pressure feedwater regulating valve feedback information refers to the sensor feedback data of the actual opening of the regulating valve, used to verify the valve position execution.

[0049] For example, a terminal or server can collect operating parameters of a high-pressure feedwater system in real time by connecting sensors (such as level transmitters, flow meters, and valve position feedback devices), and use a data acquisition module to filter and standardize the signals to form a structured operating status dataset. For instance, during the operation of a gas turbine unit, the terminal can periodically read the high-pressure steam drum water level, feedwater flow rate, and commands and feedback signals from the regulating valves, and store this data in a cache for subsequent analysis.

[0050] In this way, by monitoring multi-dimensional operating status data in real time, potential fault signs of the high-pressure water supply 100% regulating valve can be identified in the early stage, providing a data basis for subsequent anomaly judgment, thereby reducing system fluctuations caused by valve failure and enhancing the stability of water supply regulation.

[0051] S202. When the monitored operating status data meets the abnormal operating condition judgment conditions, generate a fault alarm signal for the 100% high-pressure feedwater regulating valve, switch the 100% high-pressure feedwater regulating valve to manual mode, and switch the 30% high-pressure feedwater regulating valve to automatic mode to adjust the water level of the high-pressure feedwater steam drum.

[0052] Among these, the abnormal operating condition judgment conditions refer to the preset abnormal judgment criteria of the water supply system, which are usually set based on the threshold or rate of change of operating parameters. The fault alarm signal refers to the warning information generated by the system to notify operators of valve malfunction events. The high-pressure water supply 30% regulating valve refers to a backup small-flow regulating valve, which usually intervenes when the main valve fails to maintain partial water supply function. Manual mode means that the regulating valve is directly controlled by the operator, rather than driven by the automatic control system; automatic mode means that the regulating valve is automatically adjusted by the control system according to the set value.

[0053] For example, the terminal or server can analyze the operating status data in real time through built-in logic modules (such as comparators or state machines). When it detects that a parameter exceeds the safe range (such as excessive deviation between valve command and feedback), it immediately triggers an alarm and executes valve mode switching. For instance, during the operation of a gas turbine unit, if the high-pressure feedwater flow fluctuation exceeds the threshold, the system will generate an audible and visual alarm. At the same time, it will force the 100% regulating valve to switch to manual mode through control commands and activate the automatic control of the 30% regulating valve, causing it to open at a preset opening degree to smoothly take over the feedwater task.

[0054] Thus, through automatic fault detection and rapid valve switching mechanism, the backup valve can be activated in time when the 100% regulating valve of high pressure water supply fails, avoiding water supply interruption or pressure change, maintaining the stability of the high pressure steam drum water level, thereby effectively mitigating the risk of system shutdown caused by the instability of regulation after the main valve fails in the existing technology.

[0055] S203. After the equipment fault is cleared, in response to the operation of putting the 100% high-pressure water supply regulating valve into automatic mode, the 100% high-pressure water supply regulating valve is switched to automatic mode, and the 30% high-pressure water supply regulating valve is closed.

[0056] The operation of activating automatic mode refers to the instruction issued by the operator or the system to restore the automatic control of the main valve. Closing the 30% high-pressure water supply regulating valve means completely closing the standby valve to stop its water supply function and ensure that the main valve regains control of regulation.

[0057] For example, the terminal or server can receive an activation command from a human-machine interface (HMI) or automated program, verify the status of the 100% high-pressure feedwater regulating valve, and then send a control signal to switch it back to automatic mode, while gradually reducing the valve opening by 30% until it is completely closed. For instance, after the gas turbine unit has stabilized and the 100% high-pressure feedwater regulating valve malfunction has resolved and the high-pressure steam drum water level is normal, the operator can click the "Automatic Activation" button on the control panel to put the 100% high-pressure feedwater regulating valve into automatic mode. In this way, by orderly restoring the main valve's automatic control and closing the backup valve, seamless switching of the feedwater system is achieved, reducing interference during mode transitions and thus improving the overall reliability of the system.

[0058] In this embodiment, by monitoring the operating status data associated with the 100% high-pressure feedwater regulating valve, including the high-pressure feedwater drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback information, real-time monitoring and comprehensive evaluation of the regulating valve's operating status can be achieved, providing accurate data support for fault diagnosis. When the monitored operating status data meets the abnormal operating condition judgment criteria, a fault alarm signal is generated for the 100% high-pressure feedwater regulating valve, and the 100% high-pressure feedwater regulating valve is switched to manual mode, while the 30% high-pressure feedwater regulating valve is switched to automatic mode, controlling the 30% high-pressure feedwater... When the % regulating valve is opened, the fault response mechanism can be quickly triggered. Seamless replacement of the regulating function can be achieved through mode switching, preventing system fluctuations caused by single valve failure. When the fault of the 100% high-pressure feedwater regulating valve is eliminated, in response to the operation of putting the 100% high-pressure feedwater regulating valve into automatic mode, the 100% high-pressure feedwater regulating valve is switched to automatic mode, and the 30% high-pressure feedwater regulating valve is closed. This can realize automatic system reset after fault elimination, ensure orderly switching of dual-valve regulating logic and stable transition of unit operating parameters, thereby improving the stability of fault handling of the 100% high-pressure feedwater regulating valve and reducing the cumbersome manual adjustment.

[0059] In an exemplary embodiment, when the monitored operating status data meets the abnormal operating condition judgment conditions, the method further includes:

[0060] Based on the opening degree of the 30% pneumatic regulating valve, adjust the pressure setting value of the high-pressure feed water pump frequency converter to ensure the reasonable adjustment range of the 30% pneumatic regulating valve.

[0061] Among them, high-pressure feedwater pump frequency conversion regulation refers to the method of controlling feedwater pressure by adjusting the feedwater pump speed through a frequency converter. The pressure setpoint refers to the target pressure value for maintaining stable operation of the feedwater system, usually calculated based on load demand. A 30% pneumatic regulating valve refers to a small-flow regulating valve driven pneumatically, used for precise control of feedwater flow.

[0062] For example, the terminal or server can generate an initial pressure setpoint for the high-pressure feedwater pump frequency converter based on unit load data, and correct this pressure setpoint by adjusting the opening of the 30% pneumatic regulating valve to ensure the regulating margin of the 30% pneumatic regulating valve. For instance, after detecting an abnormal operating condition, the system will read the valve position information of the 30% pneumatic regulating valve and dynamically correct the feedwater pressure setpoint of the high-pressure feedwater pump frequency converter to match the feedwater demand.

[0063] Optionally, the self-handling method after a failure of the high-pressure water supply 100% regulating valve may include:

[0064] The 30% pneumatic regulating valve for high-pressure feedwater is set to automatic operation to regulate the water level in the high-pressure steam drum. Simultaneously, to ensure the regulating margin of the 30% pneumatic regulating valve, the pressure setpoint of the high-pressure feedwater pump is adjusted in conjunction with the valve to guarantee normal operation.

[0065] In this embodiment, by dynamically adjusting the pressure setpoint and precisely controlling the valve opening, the water supply pressure is kept stable when the backup valve is engaged, avoiding the impact of pressure fluctuations on the high-pressure steam drum. This enhances the stability of regulation during the fault transition period and solves the system instability problem caused by inaccurate adjustment of the backup valve in the prior art.

[0066] In an exemplary embodiment, after the fault of the 100% high-pressure water supply regulating valve is cleared, the operator manually switches the 100% high-pressure water supply regulating valve to automatic mode and controls the 30% high-pressure water supply regulating valve to close, including:

[0067] When the water level in the high-pressure feedwater steam drum meets the preset water level range, a water level regulation signal is generated for the high-pressure feedwater 100% regulating valve to control the high-pressure feedwater 100% regulating valve to regulate the water level.

[0068] Adjust the water level setting of the 30% high-pressure water supply regulating valve to the preset water level reduction value so that the 30% high-pressure water supply regulating valve gradually closes during the regulation process.

[0069] The preset water level range refers to the safe operating range of the high-pressure steam drum water level, usually defined by the system design specifications. The water level adjustment signal refers to the command sent by the control system to adjust the valve opening to maintain the water level. The water level reduction value refers to the threshold value for gradually lowering the standby valve water level setpoint, aiming to smoothly transfer control.

[0070] For example, the terminal or server can continuously monitor the water level in the high-pressure steam drum. When the water level enters a stable range, a PID control signal is generated for the 100% high-pressure feedwater regulating valve. At the same time, the water level setting value of the 30% high-pressure feedwater regulating valve is gradually reduced at a certain rate (60mm / min) (for example, from the normal value of 0mm to -50mm). Under the regulation of the PID, the valve is slowly closed during the regulation process.

[0071] Optionally, the self-handling method after a failure of the high-pressure water supply 100% regulating valve may include:

[0072] After the maintenance of the 100% pneumatic control valve for high-pressure feedwater is completed, the operator will put the 100% pneumatic control valve for high-pressure feedwater into automatic mode. If there is no fault alarm signal for the 100% pneumatic control valve for high-pressure feedwater, and the steam drum water level is within ±50mm of the normal set value, a normal water level adjustment signal for the 100% pneumatic control valve for high-pressure feedwater will be generated. Subsequently, the water level set value of the 30% pneumatic control valve for high-pressure feedwater will be reduced by -50mm compared to the normal water level set value. The 30% pneumatic control valve for high-pressure feedwater will gradually close during the subsequent adjustment process.

[0073] In this embodiment, by verifying the water level conditions and gradually closing the backup valve, the seamless switching between the main and backup valves is achieved, preventing sudden changes in water level and pressure surges. This improves the system's regulation stability during the fault recovery phase and solves the problem of unstable water supply caused by instantaneous valve switching in the prior art.

[0074] In an exemplary embodiment, after switching the 100% high-pressure water supply regulating valve to automatic mode and controlling the 30% high-pressure water supply regulating valve to close, the method further includes:

[0075] Based on the opening degree of the 100% pneumatic regulating valve, adjust the frequency conversion regulating pressure setting value of the high-pressure feed water pump to ensure the reasonable adjustment range of the 100% pneumatic regulating valve.

[0076] When the opening of the 100% pneumatic control valve is too large and the regulation capacity is insufficient, increase the frequency converter regulation pressure setting value; when the opening of the control valve is too small, the water level is normal, and there is throttling loss, decrease the frequency converter regulation pressure setting value to achieve energy saving and ensure that the 100% pneumatic control valve is within a reasonable regulation range (40%-80%).

[0077] For example, after the main valve returns to automatic mode, the terminal or server can adjust the opening of the 100% pneumatic regulating valve via a pneumatic actuator to correct the pressure setpoint of the high-pressure feedwater frequency converter control. For instance, the system determines the pressure setpoint reference value for the high-pressure feedwater frequency converter control based on the load, corrects the pressure setpoint by adjusting the opening of the 100% pneumatic regulating valve, obtains the frequency converter control pressure setpoint, and uses a closed-loop control algorithm to output a valve position signal to ensure that the feedwater pressure is consistent with the setpoint.

[0078] Optionally, the self-handling method after a failure of the high-pressure water supply 100% regulating valve may include:

[0079] To ensure the adjustment margin and energy-saving effect of the 100% pneumatic control valve, after the 30% high-pressure water supply control valve is fully closed, the 100% pneumatic control valve is linked to the high-pressure water supply pump frequency converter to adjust the pressure set value, ensuring that the 100% pneumatic control valve is adjusted normally.

[0080] In some examples, the high-pressure water supply 30% regulating valve is switched to manual mode after it is fully closed.

[0081] In this embodiment, by recalibrating the pressure setpoint and precisely adjusting the main valve opening, the pressure stability of the water supply system after the fault is recovered is ensured, and equipment wear caused by pressure fluctuations is reduced, thereby solving the instability problem of delayed adjustment response after the main valve restarts in the prior art.

[0082] Figure 4 This application provides a schematic diagram of a fault self-handling circuit for a 100% high-pressure feedwater regulating valve in a gas turbine unit. In this fault self-handling circuit, the active terminal of the fault self-handling function activation / deactivation button 6 is directly connected to the set (S) terminal of the RS trigger 8. The digital signal 1 (unit trip signal) is connected to the input terminal of the OR gate 7. The deactivation terminal of the fault self-handling function activation / deactivation button 6 is directly connected to the OR gate 7, and the output terminal of the OR gate 7 is connected to the reset terminal of the RS trigger 8. A value of 1 on the RS trigger 8 indicates that the fault self-handling function is activated. The 100% high-pressure feedwater regulating valve fault self-handling function is only effective when the fault self-handling function is activated.

[0083] Digital signal 2, indicating a 100% high-pressure water supply regulating valve fault, is connected to the input of AND gate 9. The set output of RS flip-flop 8 is connected to the input of AND gate 9, and the output of AND gate 9 is "100% high-pressure water supply regulating valve fault 25". Simultaneously, the output of AND gate 9 is also connected to the set output of RS flip-flop 18. The reset output of RS flip-flop 8 is connected to the input of OR gate 17. The output of AND gate 23 is also connected to the input of OR gate 17, and the output of OR gate 17 is connected to the reset output of RS flip-flop 18. The output of RS flip-flop 18 is connected to module 19 with a 2s inverse delay. The output of the anti-delay module 19 is connected to the input of the AND gate 20. The digital signal 2, the fault signal of the 100% high-pressure water supply regulating valve, is connected to the input of the AND gate 20 through the NOT module 14. The digital signal 4, the automatic connection of the 100% high-pressure water supply regulating valve, is connected to the input of the AND gate 20. The analog signal 3, the steam drum water level, is connected to the positive terminal of the subtractor 11 and simultaneously to the input of the inertial module 10. The time of the inertial module 10 is 60 seconds. The output of the inertial module 10 is connected to the negative terminal of the subtractor 11. The output of the subtractor 11 is connected to the input of the high and low limit module 12. The output of the high and low limit module 12 is connected to the input of the AND gate 20 through the NOT module 13. The output of AND gate 20 is connected to the input of AND gate 21. Digital signal 5, the high-pressure water supply 30% regulating valve, is automatically connected to the input of AND gate 21. The output of AND gate 21 is output to digital signal 26, the high-pressure water supply 100% regulating valve, after a 3-second pulse module. The water level is adjusted to be normal, and the water level set value of the high-pressure water supply 30% regulating valve is reduced, so that the high-pressure water supply 30% regulating valve can be automatically and gradually closed in the subsequent adjustment process.

[0084] Analog signal 28 is the feedback input from the 30% high-pressure water supply regulating valve to the low-limit module 15, with a low-limit value of 3%. The output of the low-limit module 15 is sent to the delay module 16, with a delay of 30 seconds. The input of the delay module 16 is sent to AND gate 23. The output of AND gate 21 is connected to AND gate 23. The output of AND gate 23 is sent to pulse module 24, with a pulse duration of 3 seconds. The output of pulse module 24 is sent to digital signal 27, indicating that the 100% high-pressure water supply regulating valve is normal and 100% closed. Digital signal 27 then manually activates the 30% high-pressure water supply regulating valve. This completes the entire fault self-handling process, with the 100% high-pressure water supply regulating valve operating normally and the 30% high-pressure water supply regulating valve disengaging from operation.

[0085] In one exemplary embodiment, the method further includes:

[0086] The fault status of the 100% high-pressure water supply regulating valve is recorded using an RS trigger.

[0087] Under the condition that the reset conditions of the RS trigger are met, the fault state of the 100% high-pressure water supply regulating valve is cleared; the reset conditions include the 100% high-pressure water supply regulating valve exiting the fault self-recovery mode and the opening degree of the 30% high-pressure water supply regulating valve being less than the preset opening degree.

[0088] Here, the RS trigger refers to a logic circuit or software module used to store binary states (such as fault / normal), which in this application is used to persistently record valve fault events. The reset condition refers to the criteria required to clear the fault state, and the preset opening degree refers to the closing threshold of the 30% control valve, which is usually set to a small value close to zero.

[0089] For example, the terminal or server can implement RS trigger logic to set a fault state (Set) when an abnormal operating condition is detected, and reset (Reset) when the valve switching is completed and the valve opening is below a threshold (e.g., 5%). For instance, the system continuously monitors the valve status and opening, and automatically clears the fault flag once the conditions are met, allowing the system to resume normal monitoring.

[0090] Optionally, the self-handling method after a failure of the high-pressure water supply 100% regulating valve may include:

[0091] Use an RS trigger to record fault information of the 100% high-pressure feedwater control valve. Reset conditions (the following conditions are OR relationships): ① The 100% high-pressure feedwater control valve fault self-processing function exits. ② The opening of the 30% high-pressure feedwater control valve is <30%, with a delay of 30 seconds.

[0092] In this embodiment, the state management of the RS trigger ensures the accuracy of fault records and the strict verification of reset conditions, avoiding false resets or repeated alarms, thereby improving the reliability and maintainability of the system and solving the problem of adjustment chaos caused by improper fault state handling in the prior art.

[0093] In one exemplary embodiment, when the monitored operating status data meets abnormal operating conditions, a fault alarm signal is generated for the 100% high-pressure water supply regulating valve, further comprising:

[0094] If the high-pressure feedwater 100% regulating valve is in automatic mode, the gas turbine unit is running, there are no sudden load changes in the gas turbine unit, and there are no sudden pressure changes in the high-pressure steam drum, then a fault alarm signal for the high-pressure feedwater 100% regulating valve will be generated if the monitored operating data meets the abnormal operating conditions.

[0095] Among these, the operating status of the gas turbine unit refers to the gas turbine and its auxiliary systems being in normal operating mode. Load mutation refers to a rapid change in the unit's output power, which may affect the balance of the feedwater system. High-pressure drum pressure mutation refers to a sharp fluctuation in pressure within the drum, usually caused by thermal imbalance.

[0096] For example, the terminal or server can first verify that the high-pressure feedwater 100% regulating valve is in automatic mode, the gas turbine is operating smoothly and without external interference (such as sudden load or pressure changes) by integrating data from the unit control system, and then judge abnormalities by combining the operating status data. For example, the system will check the unit power curve and historical data of the steam drum pressure, and only after ruling out external factors will it trigger a fault alarm for the valve itself.

[0097] In this embodiment, by introducing a multi-condition verification mechanism, the probability of false alarms is reduced, ensuring that fault alarms are triggered only under abnormalities directly related to the valve, thereby improving alarm accuracy and system response efficiency, and solving the problem of regulation instability caused by false alarms due to external interference in the prior art.

[0098] In one exemplary embodiment, the method further includes:

[0099] If the deviation between the feedback information of the high-pressure water supply regulating valve and the command of the high-pressure water supply regulating valve is greater than the preset deviation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0100] If the fluctuation value of the high-pressure water supply flow rate within a preset time is greater than the preset flow fluctuation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0101] If the electric valve of the high-pressure evaporator's periodic drain pipe is closed and the fluctuation of the high-pressure feedwater steam drum water level is greater than the preset water level fluctuation threshold, then the operating status data is determined to meet the abnormal operating conditions.

[0102] If the high-pressure water supply regulating valve command indicates that the opening degree of the high-pressure water supply regulating valve is within the preset opening degree range, and the change in the high-pressure water supply regulating valve command is greater than the preset change threshold but the water supply flow rate does not change, then the operating status data is determined to meet the abnormal operating condition conditions.

[0103] Among these, the preset deviation threshold refers to the maximum allowable difference between the valve command and the feedback, which is usually set according to the valve accuracy. The preset flow fluctuation threshold refers to the maximum allowable change in feedwater flow rate within a specific time period (e.g., a few seconds). The preset water level fluctuation threshold refers to the allowable fluctuation range of the high-pressure steam drum water level during non-blowout operations. The preset opening range and change threshold refer to the range within which the valve command changes within the normal operating range, but the feedwater flow rate remains unchanged.

[0104] For example, the terminal or server can calculate the comparison results of these parameters with thresholds in real time. For instance, it can periodically detect valve deviation, flow fluctuation, water level change, and command change, and determine an abnormal operating condition if any condition exceeds the limit. For example, the system may sample data every 250 milliseconds and use a sliding window to calculate the fluctuation value to quickly trigger anomaly detection.

[0105] In this embodiment, abnormal operating conditions are determined by a combination of multiple indicators, which improves the comprehensiveness and timeliness of fault detection. It can identify various potential faults of the 100% high-pressure water supply regulating valve at an early stage, thereby intervening in the handling in advance, avoiding the escalation of the fault, and effectively solving the problem of regulation instability caused by the failure to report due to a single detection standard in the prior art.

[0106] In some exemplary embodiments, under the conditions that the 100% pneumatic control valve for high-pressure feedwater is in automatic operation, the gas turbine is running, and there are no sudden changes in gas turbine load or high-pressure steam drum pressure, the changes in the 100% control valve for high-pressure feedwater and the high-pressure feedwater flow are monitored. When abnormal conditions such as large deviation between the feedback and command of the 100% control valve for high-pressure feedwater, large fluctuations in high-pressure feedwater flow, abnormal fluctuations in high-pressure steam drum water level, or valve stem detachment are detected, a fault alarm signal for the 100% control valve for high-pressure feedwater is generated. This prompts the operators to pay attention to and repair the 100% control valve for high-pressure feedwater, and lays the foundation for subsequent self-handling of faults in the 100% control valve for high-pressure feedwater.

[0107] When the fault self-recovery function is enabled, if there is a fault alarm signal for the 100% high-pressure water supply regulating valve, a fault signal for the 100% high-pressure water supply regulating valve will be generated. The system will automatically handle the abnormality, switch the 100% high-pressure water supply regulating valve to manual mode, switch the 30% high-pressure water supply regulating valve to automatic mode, and set the water level to the normal water level setting value.

[0108] After the defect of the 100% high-pressure feedwater regulating valve is resolved, the operators will put the 100% high-pressure feedwater regulating valve into automatic mode. Once the high-pressure steam drum water level is normal, the set value of the 30% high-pressure feedwater regulating valve will be automatically lowered. While ensuring the high-pressure steam drum water level is stable, the 30% high-pressure feedwater regulating valve will gradually close, and the system will return to its state before the abnormality.

[0109] In this embodiment, after a failure of the 100% high-pressure feedwater regulating valve, the valve is switched to manual mode, while the 30% high-pressure feedwater regulating valve is put into automatic mode to regulate the high-pressure steam drum water level, ensuring the normal steam drum water level. After maintenance personnel have addressed the relevant defects, the 100% high-pressure feedwater regulating valve is put back into automatic mode, and the 30% high-pressure feedwater regulating valve automatically closes, restoring the system to its pre-fault state. This achieves automatic, stable, and safe control of the high-pressure steam drum water level in the waste heat boiler, avoiding the cumbersome and unstable manual adjustment, and improving the power plant's operating efficiency and safety.

[0110] In some exemplary embodiments, such as Figure 3 As shown, Figure 3 A schematic diagram illustrating the principle of a fault alarm signal for a 100% high-pressure water supply regulating valve provided in this application embodiment includes:

[0111] Under the conditions of automatic operation, gas turbine operation, no sudden changes in gas turbine load, and no sudden changes in high-pressure steam drum pressure, the high-pressure feedwater 100% pneumatic regulating valve will trigger an alarm signal if any of the following conditions are met:

[0112] 1) The feedback and command deviation of the 100% high-pressure water supply regulating valve are large, exceeding 15%, with a delay of 3 seconds;

[0113] 2) The high-pressure water supply flow rate fluctuates greatly, with more than 6 fluctuations (±35t / h / 5s) within 300s.

[0114] 3) When the electric valve of the high-pressure evaporator's periodic drain pipe is closed, the water level in the high-pressure steam drum fluctuates abnormally, with more than 6 fluctuations (±15mm / 5s) within 300s.

[0115] 4) The opening command of the 100% high-pressure water supply regulating valve is between 30% and 80% and the opening command changes greatly (±6% / min) with a delay of 5 seconds, but the high-pressure water supply flow rate does not change significantly (less than ±10t / h / min).

[0116] like Figure 5 As shown, Figure 5 The schematic diagram of the pressure setpoint circuit for the frequency converter regulation of the high-pressure feedwater pump provided in this application embodiment includes: the 30% high-pressure feedwater regulating valve is put into automatic mode to regulate the water level in the high-pressure steam drum. Simultaneously, to ensure the adjustment margin of the 30% pneumatic regulating valve, the 30% pneumatic regulating valve is linked to the frequency converter regulation of the high-pressure feedwater pump pressure setpoint to ensure normal regulation of the 30% pneumatic regulating valve, such as... Figure 5 As shown.

[0117] Use an RS trigger to record information about a fault in the 100% high-pressure feedwater control valve. Reset conditions (OR relationship): ① The 100% high-pressure feedwater control valve fault self-processing function exits. ② The 30% high-pressure feedwater control valve opening is <3%, with a 30s delay.

[0118] When the maintenance of the 100% high-pressure feedwater regulating valve is completed, and the 100% high-pressure feedwater regulating valve is put into automatic mode, there is no fault alarm signal for the 100% high-pressure feedwater regulating valve. When the steam drum water level is within ±50mm of the normal set value, a normal water level regulation signal for the 100% high-pressure feedwater regulating valve is generated. Subsequently, the water level set value of the 30% high-pressure feedwater regulating valve is reduced by -50mm compared to the normal water level set value. The 30% high-pressure feedwater regulating valve will gradually close during the subsequent regulation process.

[0119] Depending on the habits of each power plant, some plants will switch the 30% high-pressure feedwater pneumatic regulating valve to manual mode after the 30% high-pressure feedwater regulating valve is fully closed, while other plants will keep the 30% high-pressure feedwater regulating valve in automatic mode.

[0120] Since the 100% pneumatic control valve and the 30% pneumatic control valve have different adjustment capabilities, in order to ensure the adjustment margin of the 100% pneumatic control valve, after the 30% high-pressure water supply control valve is fully closed, the 100% pneumatic control valve is linked to the high-pressure water supply pump frequency converter to adjust the pressure set value, so as to ensure the normal adjustment of the 100% pneumatic control valve.

[0121] In this embodiment, automatic, stable, and safe control of the high-pressure steam drum water level is achieved after the failure of the 100% regulating valve of the high-pressure feedwater in the waste heat boiler of the gas turbine unit. This avoids the cumbersome and unstable manual adjustment and improves the operating efficiency and safety of the power plant.

[0122] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0123] The following describes the high-pressure feedwater 100% regulating valve fault handling system for gas turbine units provided in the embodiments of this application. The high-pressure feedwater 100% regulating valve fault handling system for gas turbine units has the same inventive concept as the above-described high-pressure feedwater 100% regulating valve fault handling method for gas turbine units. The solution provided by this system is similar to the solution described in the above-described method. Therefore, the specific limitations of one or more embodiments of the high-pressure feedwater 100% regulating valve fault handling system for gas turbine units provided below can be referred to the limitations of the high-pressure feedwater 100% regulating valve fault handling method for gas turbine units described above. The high-pressure feedwater 100% regulating valve fault handling system for gas turbine units described below can be referred to in correspondence with the high-pressure feedwater 100% regulating valve fault handling method for gas turbine units described above, and will not be repeated here.

[0124] In one exemplary embodiment, Figure 6 This application provides a schematic diagram of the structure of a high-pressure feedwater regulating valve fault handling system for a gas turbine unit, as shown in the embodiments of this application. Figure 6 As shown, the high-pressure feedwater regulating valve fault handling system 50 of the gas turbine unit includes: a status monitoring module 510, a mode switching module 520, and an automatic mode recovery module 530, wherein:

[0125] The status monitoring module 510 is used to monitor the operating status data associated with the high-pressure feedwater 100% regulating valve. The operating status data includes the high-pressure feedwater steam drum water level, high-pressure feedwater flow rate, high-pressure feedwater regulating valve commands, and high-pressure feedwater regulating valve feedback information.

[0126] The mode switching module 520 is used to generate a fault alarm signal for the 100% high-pressure feedwater regulating valve when the monitored operating status data meets the abnormal operating condition judgment conditions, and to switch the 100% high-pressure feedwater regulating valve to manual mode and the 30% high-pressure feedwater regulating valve to automatic mode to adjust the water level of the high-pressure feedwater steam drum.

[0127] The automatic mode recovery module 530 is used to switch the high-pressure water supply 100% regulating valve to automatic mode and control the high-pressure water supply 30% regulating valve to close after the equipment fault is cleared.

[0128] In an exemplary embodiment, the mode switching module 520 is used to determine the pressure setting value of the high-pressure feedwater pump frequency conversion regulation. The 30% pneumatic regulating valve is linked to the high-pressure feedwater pump frequency conversion regulation to correct the high-pressure feedwater pump frequency conversion pressure setting value, ensuring that the 30% pneumatic regulating valve is adjusted normally.

[0129] In an exemplary embodiment, the automatic mode recovery module 530 is used to generate a water level adjustment signal for the high-pressure feedwater 100% regulating valve when the water level in the high-pressure feedwater steam drum meets the preset water level range, so as to control the high-pressure feedwater 100% regulating valve to perform water level adjustment; adjust the water level set value of the high-pressure feedwater 30% regulating valve to the preset water level reduction value, and control the high-pressure feedwater 30% regulating valve to gradually close during the adjustment process according to the water level reduction value.

[0130] In one exemplary embodiment, the automatic mode recovery module 530 is used to correct the frequency conversion pressure setting value of the high-pressure water pump in conjunction with the 100% pneumatic regulating valve, thereby ensuring the normal adjustment of the 100% pneumatic regulating valve.

[0131] In an exemplary embodiment, the automatic mode recovery module 530 is used to record the fault state of the 100% high-pressure water supply regulating valve via an RS trigger; and to release the fault state of the 100% high-pressure water supply regulating valve when the reset conditions of the RS trigger are met; the reset conditions include the 100% high-pressure water supply regulating valve exiting the fault self-recovery mode and the opening degree of the 30% high-pressure water supply regulating valve being less than a preset opening degree.

[0132] In an exemplary embodiment, the mode switching module 520 is used to generate a fault alarm signal for the high-pressure feedwater 100% regulating valve if the high-pressure feedwater 100% regulating valve is in automatic mode, the gas turbine unit is in operation, there is no load change in the gas turbine unit, and there is no pressure change in the high-pressure steam drum, and the monitored operating status data meets the abnormal operating conditions.

[0133] In an exemplary embodiment, the mode switching module 520 is configured to determine that the operating status data meets abnormal operating conditions if the deviation between the feedback information and the command of the high-pressure feedwater regulating valve is greater than a preset deviation threshold; if the fluctuation value of the high-pressure feedwater flow rate within a preset time is greater than a preset flow fluctuation threshold; if the fluctuation of the high-pressure feedwater steam drum water level is greater than a preset water level fluctuation threshold when the electric valve of the high-pressure evaporator periodic drain pipe is closed; and if the high-pressure feedwater regulating valve command indicates that the opening degree of the high-pressure feedwater regulating valve is within a preset opening degree range, and the change in the high-pressure feedwater regulating valve command is greater than a preset change amount threshold, but the change in the high-pressure feedwater flow rate is less than a preset threshold.

[0134] In one exemplary embodiment, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a microprocessor, implements the steps of the high-pressure feedwater 100% regulating valve fault handling method for any of the gas turbine units described in the above embodiments.

[0135] In one exemplary embodiment, this application also provides a computer device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the high-pressure feedwater regulating valve fault handling method for any of the gas turbine units described in the above embodiments.

[0136] In one exemplary embodiment, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the high-pressure feedwater regulating valve fault handling method for any of the gas turbine units described in the above embodiments.

[0137] Indicatively, such as Figure 7 As shown, Figure 7 This is a schematic diagram of the internal structure of a computer device 600 provided in an embodiment of this application. The computer device 600 can be provided as a server. (Refer to...) Figure 7The computer device 600 includes a processing component 602, which further includes one or more processors, and memory resources represented by memory 601 for storing instructions, such as application programs, that can be executed by the processing component 602. The application programs stored in memory 601 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 602 is configured to execute instructions to perform a high-pressure feedwater regulating valve fault handling method for a gas turbine unit according to any of the above embodiments.

[0138] The computer device 600 may also include a power supply component 603 configured to perform power management of the computer device 600, a wired or wireless network interface 604 configured to connect the computer device 600 to a network, and an input / output (I / O) interface 605. The computer device 600 may operate on an operating system stored in memory 601, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™, or similar.

[0139] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0140] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0141] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover 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.

[0142] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0143] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure feedwater regulating valve fault handling method for a gas turbine unit, characterized by, The method comprises: monitoring operation state data associated with the high-pressure feed water 100% regulating valve, the operation state data comprising high-pressure feed water drum water level, high-pressure feed water flow, high-pressure feed water regulating valve instruction, high-pressure feed water regulating valve feedback information; in the case where it is monitored that the operation state data satisfies abnormal condition judgment condition, generating a fault alarm signal for the high-pressure feed water 100% regulating valve, switching the high-pressure feed water 100% regulating valve to manual mode, and switching the high-pressure feed water 30% regulating valve to automatic mode, and adjusting the high-pressure feed water drum water level; after the equipment fault is eliminated, in response to the operation of putting the high-pressure feed water 100% regulating valve into automatic mode, switching the high-pressure feed water 100% regulating valve to automatic mode, and controlling the high-pressure feed water 30% regulating valve to close.

2. The method of claim 1, wherein, when it is monitored that the operation state data satisfies abnormal condition judgment condition, the method further comprises: correcting the pressure set value of the high-pressure feed water pump frequency conversion regulation according to the opening of the 30% pneumatic regulating valve.

3. The method of claim 1, wherein, the switching of the high-pressure feed water 100% regulating valve to automatic mode and the controlling of the high-pressure feed water 30% regulating valve to close comprises: in the case where the high-pressure feed water drum water level satisfies a preset water level range, generating a water level regulating signal of the high-pressure feed water 100% regulating valve to control the high-pressure feed water 100% regulating valve to carry out water level regulation; adjusting the water level set value of the high-pressure feed water 30% regulating valve to a preset water level reduction value, so that the high-pressure feed water 30% regulating valve is gradually closed in the regulating process.

4. The method of claim 1, wherein, after the switching of the high-pressure feed water 100% regulating valve to automatic mode and the controlling of the high-pressure feed water 30% regulating valve to close, the method further comprises: correcting the pressure set value of the high-pressure feed water pump frequency conversion regulation according to the opening of the 100% pneumatic regulating valve.

5. The method of claim 1, wherein, the method further comprises: recording the fault state of the high-pressure feed water 100% regulating valve through an RS trigger; in the case where a reset condition of the RS trigger is satisfied, canceling the fault state of the high-pressure feed water 100% regulating valve; the reset condition comprises that the high-pressure feed water 100% regulating valve exits the fault self-recovery mode, and the opening of the high-pressure feed water 30% regulating valve is less than a preset opening.

6. The method of claim 1, wherein, the generating of the fault alarm signal for the high-pressure feed water 100% regulating valve in the case where it is monitored that the operation state data satisfies abnormal condition condition further comprises: if the high-pressure feed water 100% regulating valve is in automatic mode, the gas turbine unit is in running state, there is no load mutation of the gas turbine unit, and there is no high-pressure drum pressure mutation, then in the case where it is monitored that the operation state data satisfies abnormal condition condition, the fault alarm signal for the high-pressure feed water 100% regulating valve is generated.

7. The method according to any one of claims 1 to 6, characterized in that, the method further comprises: if the deviation between the high-pressure feed water regulating valve feedback information and the high-pressure feed water regulating valve instruction is greater than a preset deviation threshold, it is determined that the operation state data satisfies abnormal condition condition; if the fluctuation value of the high-pressure feed water flow within a preset time is greater than a preset flow fluctuation threshold, it is determined that the operation state data satisfies abnormal condition condition; If the high-pressure evaporator regularly drains the pipe mother electric door to the position, the high-pressure feed water boiler water level fluctuation is greater than the preset water level fluctuation threshold, the running state data is determined to meet the abnormal condition condition; If the high-pressure feed water regulating valve instruction represents the opening of the high-pressure feed water regulating valve in the preset opening range, and the change amount of the high-pressure feed water regulating valve instruction is greater than the preset change amount threshold, it is determined that the running state data meets the abnormal condition condition.

8. A high pressure feedwater regulating valve fault handling system for a gas turbine unit, characterized by, The device comprises: A state monitoring module for monitoring the running state data associated with the high-pressure feed water 100% regulating valve, the running state data comprising high-pressure feed water boiler water level, high-pressure feed water flow, high-pressure feed water regulating valve instruction, high-pressure feed water regulating valve feedback information; A mode switching module for generating a fault alarm signal for the high-pressure feed water 100% regulating valve and switching the high-pressure feed water 100% regulating valve to manual mode and the high-pressure feed water 30% regulating valve to automatic mode to adjust the high-pressure feed water boiler water level when the running state data meets the abnormal condition condition; An automatic mode recovery module for switching the high-pressure feed water 100% regulating valve to automatic mode and controlling the high-pressure feed water 30% regulating valve to close when the equipment fault is eliminated in response to the operation of the high-pressure feed water 100% regulating valve in automatic mode. 9.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-8 when the computer program is executed by the processor. The processor executes the computer program to realize the steps of the method of any one of claims 1 to 7.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method of any one of claims 1 to 7.

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