Method, device and system for determining guide vane sticking of a hydraulic turbine governor

Abstract

The present disclosure relates to a guide vane sticking determination method, device and system of a water turbine governor. The method comprises: in response to an action instruction for the guide vane, obtaining a given opening degree of the guide vane and an actual opening degree of the guide vane; determining a deviation value between the given opening degree of the guide vane and the actual opening degree of the guide vane; in the case that the deviation value meets a preset condition, obtaining an opening cavity oil pressure and a closing cavity oil pressure of a guide vane servomotor chamber; and determining whether the guide vane has stuck based on the sign of the deviation value, the opening cavity oil pressure and the closing cavity oil pressure. The present scheme improves the accuracy of guide vane sticking identification.

Description

Technical Field

[0001] This disclosure relates to the field of hydropower station technology, and in particular to a method, device and system for determining guide vane jamming in a turbine governor. Background Technology

[0002] Currently, hydropower stations generally use an elimination method based on the sequential control process of guide vane movement to determine guide vane jamming. This method requires installing sensors in multiple intermediate links (such as solenoid valves and pressure regulating valves) and confirming the fault through step-by-step troubleshooting. However, this method requires a large number of sensors, is costly, and the failure of any one sensor will cause the entire judgment logic to fail. At the same time, in the complex hydraulic circuit, valve malfunctions, pipeline leaks, etc., can all lead to inaccurate process judgment, making it impossible to distinguish between mechanical guide vane jamming and hydraulic control failure. This results in low accuracy and a high risk of misjudgment, posing a hidden danger to the safe operation of the unit. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a method, device and system for determining guide vane jamming in a water turbine governor.

[0004] According to a first aspect of the present disclosure, a method for determining guide vane jamming in a water turbine governor is provided, comprising:

[0005] In response to the issuance of an action command for the guide vane, the given opening degree of the guide vane and the actual opening degree of the guide vane are obtained; Determine the deviation between the given opening of the guide vane and the actual opening of the guide vane; When the deviation value meets the preset conditions, the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained; Based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure, it is determined whether the guide vane is stuck.

[0006] According to a second aspect of the present disclosure, a device for determining guide vane jamming in a water turbine governor is provided, comprising: The first acquisition unit is used to acquire the given opening degree of the guide vane and the actual opening degree of the guide vane in response to the issuance of the action command for the guide vane; The first determining unit is used to determine the deviation value between the given opening of the guide vane and the actual opening of the guide vane; The second acquisition unit is used to acquire the opening oil pressure and closing oil pressure of the guide vane relay chamber when the deviation value meets the preset conditions. The second determining unit is used to determine whether the guide vane is stuck based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure.

[0007] According to a third aspect of the present disclosure, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described in any one of the first aspects.

[0008] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method as described in any one of the first aspects.

[0009] According to a fifth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the method as described in any one of the first aspects.

[0010] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: In response to an action command issued for the guide vane, the given opening degree and the actual opening degree of the guide vane are obtained; the deviation value between the given opening degree and the actual opening degree of the guide vane is determined; when the deviation value meets preset conditions, the opening and closing oil pressures of the guide vane relay chamber are obtained; based on the sign of the deviation value, the opening and closing oil pressures, it is determined whether the guide vane is jammed. By directly monitoring the matching relationship between the guide vane position deviation and the relay drive oil pressure state, the complex investigation of the action state of intermediate links such as solenoid valves and pressure regulating valves is skipped, fundamentally simplifying the judgment logic. Only a few key sensors are needed to achieve fast and accurate jamming judgment, significantly reducing system cost and complexity, improving the real-time performance and reliability of the judgment, and effectively avoiding misjudgments caused by intermediate sensor failures or hydraulic circuit abnormalities, providing a reliable guarantee for the safe operation and rapid fault handling of the power station.

[0011] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0013] Figure 1 This is a flowchart illustrating a method for determining guide vane jamming in a turbine governor according to an exemplary embodiment.

[0014] Figure 2 This is a schematic diagram of the operating principle of the guide vane relay proposed in the embodiments of this application.

[0015] Figure 3 This is a block diagram illustrating a guide vane jamming determination device for a turbine governor according to an exemplary embodiment.

[0016] Figure 4 This is a block diagram illustrating an apparatus for determining guide vane jamming in a turbine governor according to an exemplary embodiment.

[0017] Figure Labels 1-Piston rod; 2-Opening chamber; 3-Closing chamber; 4-Control oil circuit; 5-Return oil line. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0020] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the words “if” and “suppose” as used herein may be interpreted as “when”, “when”, or “in response to a determination”.

[0021] Furthermore, various forms of processes shown in the embodiments of this disclosure can be used to reorder, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and no limitation is imposed herein.

[0022] It should be noted that the collection, storage, use, processing, transmission, provision, and disclosure of user personal information involved in the technical solution disclosed herein all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0023] In related technologies, guide vanes are actuators that regulate the active power and frequency of a hydro-generator unit. The active power processing and frequency of the unit are adjusted by controlling the opening and closing of the guide vanes. The guide vane movement is achieved by injecting pressurized oil into the opening and closing chambers of the servo motor. Guide vane jamming can lead to unit overspeed, uncontrollable load, and start-up / shutdown failures, threatening the safety of the power plant and the power grid.

[0024] Currently, hydropower plants determine guide vane jamming by following the normal guide vane operation sequence, checking each step sequentially, and finally identifying the jamming through elimination. This method requires collecting data on the actions of each mechanism during the guide vane operation sequence and judging them one by one. It requires installing many sensors to collect signals, and any sensor failure will prevent the judgment from being made. Therefore, this method is not only costly but also inaccurate.

[0025] The guide vane control process in hydropower plants is complex. The guide vane action involves not only the normal sequential control process, but also the emergency shutdown process and the accident shutdown process, all of which involve different valves. Therefore, even if the guide vane's normal sequential control process is correct, other process actions may cause the guide vane to not move. Thus, the above logic cannot accurately determine guide vane jamming.

[0026] The hydraulic circuit for guide vane control in hydropower plants is complex, consisting of solenoid valves, mechanical valves, pressure regulating valves, and pipelines. If the solenoid valve malfunctions, the mechanical valve is accidentally activated, or there is a pipeline leak, the guide vane may not move even if the guide vane operates normally and the control process is correct. Therefore, the above logic cannot accurately determine if the guide vane is stuck.

[0027] To overcome the problems existing in related technologies, this disclosure provides a method, device, and system for determining guide vane jamming in a turbine governor. The method involves responding to an action command issued for the guide vane, acquiring the given opening degree and the actual opening degree of the guide vane; determining the deviation value between the given opening degree and the actual opening degree; and, if the deviation value meets preset conditions, acquiring the opening and closing oil pressures of the guide vane servo chamber; and determining whether guide vane jamming has occurred based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure. By directly monitoring the matching relationship between the guide vane position deviation and the servo drive oil pressure state, the complex investigation of the action states of intermediate links such as solenoid valves and pressure regulating valves is bypassed, fundamentally simplifying the judgment logic. Only a few key sensors are needed to achieve rapid and accurate jamming judgment, significantly reducing system cost and complexity, improving the real-time performance and reliability of the judgment, and effectively avoiding misjudgments caused by sensor failures in intermediate links or abnormal hydraulic circuits. This provides a reliable guarantee for the safe operation and rapid fault handling of power plants.

[0028] Figure 1 This is a flowchart illustrating a method for determining guide vane jamming in a turbine governor according to an exemplary embodiment, such as... Figure 1As shown, it should be noted that the method for determining guide vane jamming in the turbine governor of this disclosure is applied to the device for determining guide vane jamming in the turbine governor. Figure 1 As shown, the method may include the following steps: Step 101: In response to the issuance of the action command for the guide vane, obtain the given opening degree of the guide vane and the actual opening degree of the guide vane.

[0029] In this embodiment, when the turbine governor control system generates and issues a guide vane opening adjustment command based on power or frequency regulation requirements, it simultaneously acquires two key signals: one is the guide vane given opening signal from the controller output, i.e., the desired target opening value; the other is the guide vane actual opening signal, i.e., the current true opening value. These two signals are the basis for determining whether the execution state follows the control command. Their acquisition is typically achieved by connecting to the existing analog or digital input / output interface of the governor control system, without requiring additional complex sensing devices.

[0030] In one embodiment, the actual opening signal of the guide vane can be acquired using a displacement sensor mounted on the guide vane operating mechanism.

[0031] Step 102: Determine the deviation between the given opening of the guide vane and the actual opening of the guide vane.

[0032] In this embodiment, the given guide vane opening value and the actual guide vane opening value can be algebraically subtracted to obtain a continuous deviation signal. This deviation value directly quantifies the difference between the control system command and the mechanical execution result: a positive deviation indicates that the actual guide vane opening is less than the command requirement, requiring action in the opening direction; a negative deviation indicates that the actual opening is greater than the command requirement, requiring action in the closing direction. This deviation value is the core input variable and judgment basis for triggering subsequent jamming judgment logic.

[0033] In some embodiments of this application, step 102 may specifically include the following steps: The difference between the given opening of the guide vane and the actual opening of the guide vane is calculated to obtain the deviation value.

[0034] Step 103: If the deviation value meets the preset conditions, obtain the opening oil pressure and closing oil pressure of the guide vane relay chamber.

[0035] like Figure 2As shown, the guide vane relay, as the core hydraulic actuator of the turbine regulating system, operates based on a double-acting cylinder drive mode. As illustrated, the cylinder body of the relay is divided into two independent chambers by a piston: an opening chamber 2 and a closing chamber 3. When the unit needs to open the guide vane (i.e., the "opening direction" shown in the diagram), pressurized oil is injected into the opening chamber 2 via control oil circuit 4, pushing the piston towards the closing chamber 3. Simultaneously, the oil in the closing chamber 3 is forced back into the return oil line 5, and the piston rod 1 drives the guide vane to rotate in the opening direction via a mechanical linkage mechanism, increasing the flow area. Conversely, when the guide vane needs to be closed, pressurized oil is injected into the closing chamber 3, the opening chamber 2 connects to the return oil line 5, and the piston moves in the opposite direction, causing the guide vane to close. This principle achieves the direct conversion of hydraulic energy into mechanical energy. By precisely controlling the oil inlet and outlet of the two chambers, the guide vane opening can be sensitively and reliably adjusted, thereby controlling the unit's output and speed.

[0036] In this embodiment, when the calculated deviation value meets preset conditions, and an abnormal state of "not moving when it should move" is confirmed in the guide vane, direct monitoring of the hydraulic driving force is triggered. Pressure sensors (or pressure transmitters) installed on the opening and closing oil lines of the guide vane servo drive simultaneously collect the opening and closing oil pressures. These two sets of pressure data directly reflect whether the hydraulic system has provided sufficient driving pressure differential to the servo drive piston as instructed, thus bypassing the tedious checks on the operating status of all intermediate valves and focusing the judgment on whether the power source of the final execution stage is properly established.

[0037] In some embodiments of this application, step 103 may specifically include the following steps: Obtain the preset opening deviation threshold; If the absolute value of the deviation is greater than the preset opening threshold, it is determined that the deviation meets the preset conditions, and the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained.

[0038] In one embodiment, a preset opening deviation threshold can be invoked first. This threshold can be a positive value set comprehensively based on the dynamic characteristics of the hydro-generator unit, control accuracy requirements, and safety margin, used to distinguish between normal regulation fluctuations and potential fault states. When the absolute value of the real-time deviation calculated in step 102 is greater than the preset threshold, it indicates that there is a significant and non-negligible difference between the actual position of the guide vane and the command requirement, thus determining that the deviation value meets the preset triggering condition. Once the condition is met, the pressure sensor signals installed on the opening and closing oil circuits of the guide vane servo are synchronously acquired to obtain the current opening and closing oil pressure values. This ensures that the check on the hydraulic drive status is initiated only when there is indeed an abnormal deviation, avoiding unnecessary occupation of system resources and effectively preventing false triggering caused by small random fluctuations, thereby improving the pertinence and reliability of jamming judgment.

[0039] In some embodiments of this application, step 103 may specifically include the following steps: If the deviation value meets the preset conditions, it is determined that the deviation value within the first preset time period meets the preset conditions, and the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained.

[0040] In this embodiment, a duration-based conditional judgment is further introduced to enhance the reliability of triggering: when the deviation value meets a preset condition (e.g., the absolute value exceeds a threshold), the oil pressure is not immediately acquired, but a timing window (i.e., a first preset duration) is initiated. The deviation value is continuously monitored, and the triggering event is only confirmed as valid when the deviation value continuously and uninterruptedly meets the preset condition within the preset duration. This delayed confirmation mechanism effectively filters out occasional, non-continuous deviations caused by instantaneous signal interference, brief fluctuations in the control system, or brief lags during normal unit adjustment, thus strictly limiting the triggering condition to reflect a true and continuous "not activated" fault state. Only after passing this time continuity test will the system execute the crucial step of acquiring the opening and closing oil pressure of the relay chamber, ensuring that subsequent jamming judgments are based on stable and reliable abnormal operating conditions, significantly improving the anti-interference capability and accuracy of the guide vane jamming judgment logic.

[0041] Step 104: Based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure, determine whether the guide vane is stuck.

[0042] In this embodiment, the theoretical direction of the guide vane's movement can be determined based on the sign (positive or negative) of the deviation value; a positive deviation indicates that it needs to be opened, and a negative deviation indicates that it needs to be closed. Next, the real-time collected opening and closing hydraulic pressures are compared with preset pressure thresholds: if the deviation is positive, it is checked whether the opening hydraulic pressure reaches the high-pressure threshold (e.g., >5.5MPa) and whether the closing hydraulic pressure is in a low-pressure state (e.g., <2.0MPa); if the deviation is negative, it is checked whether the closing hydraulic pressure reaches the high-pressure threshold and whether the opening hydraulic pressure is in a low-pressure state. When the hydraulic pressure state perfectly matches the drive logic corresponding to the deviation direction, it indicates that the hydraulic system has normally output driving force, but the guide vane still does not move, thus determining that the guide vane is mechanically stuck. This step, by directly associating the "electrical command direction" with the "hydraulic drive state," achieves accurate and direct determination of actuator sticking faults, skipping all unreliable reliance on intermediate links.

[0043] In some embodiments of this application, step 104 may specifically include the following steps: If the deviation value is positive, it is determined that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold, thus indicating that the guide vane is stuck.

[0044] In one embodiment, the specific judgment logic for positive deviation (i.e., a positive sign indicating that the guide vane needs to be opened) is as follows: When a positive deviation value is detected, meaning the actual opening degree of the guide vane is lower than the commanded opening degree, the jamming check process in the opening direction is initiated. At this time, two key hydraulic pressure conditions are checked simultaneously: First, check whether the hydraulic pressure in the opening chamber of the relay is greater than the preset first pressure threshold (e.g., 5.5 MPa). This threshold corresponds to the effective driving pressure that the hydraulic system should establish, and its compliance indicates that the pressure oil has been normally supplied to the opening side chamber. Second, check whether the hydraulic pressure in the closing chamber of the relay is less than the preset second pressure threshold (e.g., 2.0 MPa). This threshold indicates a low-pressure state with unobstructed return oil lines and normal resistance. Only when both conditions of "high pressure establishment in the opening chamber" and "low pressure relief in the closing chamber" are met simultaneously can the hydraulic drive perspective confirm that the command to "open the guide vane" has been correctly executed. If the actual opening degree of the guide vane still does not respond at this time, the possibility of insufficient hydraulic power can be ruled out, and the cause of the fault can be accurately determined to be mechanical jamming of the guide vane mechanism itself. This logic achieves deterministic and efficient judgment of jamming faults under starting conditions by directly verifying the existence of the driving force and the absence of the action result.

[0045] Furthermore, in some embodiments of this application, step 104 may specifically include the following steps: If it is determined that the opening chamber oil pressure is greater than the first pressure threshold and the closing chamber oil pressure is less than the second pressure threshold, and it is determined that the opening chamber oil pressure is greater than the first pressure threshold and the closing chamber oil pressure is less than the second pressure threshold within a second preset time period, then it is determined that the guide vane is stuck.

[0046] In one embodiment, after initially determining that the open-chamber oil pressure is greater than the first pressure threshold and the closed-chamber oil pressure is less than the second pressure threshold (i.e., the hydraulic drive state matches the opening command), a jamming conclusion is not immediately output. Instead, a continuous monitoring window of a second preset duration is initiated. Within this window, the oil pressure conditions are continuously verified to ensure they are maintained. Specifically, the states of "high pressure in the open chamber" and "low pressure in the closed chamber" must remain stable and continuous throughout the entire second preset duration. This effectively filters out transient "pseudo-normal" drive states caused by brief fluctuations in the hydraulic system, pressure transients during valve switching, or occasional interference from measurement signals, ensuring that the judgment is based on a stable and reliable abnormal operating condition. Only after the oil pressure conditions are consistently confirmed within the set duration is the guide vane jammed. This mechanism, based on spatial state (high / low oil pressure) judgment, superimposes a stability check in the time dimension, significantly enhancing the certainty and robustness of fault diagnosis conclusions and avoiding false alarms triggered by misjudgments of transient operating conditions.

[0047] In some embodiments of this application, step 104 may specifically include the following steps: If the deviation value is negative, it is determined that the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold, thus indicating that the guide vane is stuck.

[0048] In one embodiment, the specific judgment logic for negative deviation (i.e., a negative sign indicating that the guide vane needs to be closed) is as follows: When a negative deviation value is detected, meaning the actual opening of the guide vane is higher than the commanded opening, the jamming check process in the closing direction is initiated. At this time, two hydraulic pressure conditions symmetrical but opposite to the opening condition are simultaneously verified: First, check whether the hydraulic pressure in the servo motor's closing chamber is greater than a preset first pressure threshold (e.g., 5.5 MPa). Meeting this threshold indicates that the pressure oil has been normally supplied to the closing chamber to push the guide vane to close. Second, check whether the hydraulic pressure in the servo motor's opening chamber is less than a preset second pressure threshold (e.g., 2.0 MPa). This threshold indicates that the return oil in the opening chamber is unobstructed and the resistance is in a normal low-pressure state. When both the "high pressure establishment in the closing chamber" and "low pressure relief in the opening chamber" conditions are met simultaneously, the "close the guide vane" command is confirmed to have been correctly executed from the hydraulic drive perspective. If the actual opening of the guide vane still does not respond at this time, the possibility of insufficient hydraulic power can be ruled out, and the cause of the fault can be accurately determined to be mechanical jamming of the guide vane mechanism itself. By directly verifying the driving force under the closed operating condition, efficient and accurate jamming judgment consistent with the open operating condition was achieved, improving the applicability of the method under all operating conditions.

[0049] Furthermore, in some embodiments of this application, step 104 may specifically include the following steps: If the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold, and the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold for a second preset time period, then the guide vane is determined to be stuck.

[0050] In one embodiment, the jamming determination logic for negative deviation (closed condition) also introduces a crucial time-based verification step to form a complete and robust judgment loop. When the negative deviation initially determines that the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold (i.e., the hydraulic system has established the driving force in the closing direction as instructed), a second preset duration stability monitoring window is further initiated. Within this window, it is continuously verified whether the above oil pressure conditions are maintained consistently and stably, requiring that the states of "continuous high pressure in the closed chamber" and "continuous low pressure in the open chamber" are maintained without interruption throughout the entire duration. This strictly eliminates transient artifacts caused by valve switching transients, brief pressure pulsations, or occasional signal interference, ensuring that the captured abnormal driving state is a real and persistent fault representation. After the oil pressure conditions are confirmed throughout the entire second preset duration, the guide vane is finally determined to be jammed. By adding a "stability filter" in the time dimension, the jam diagnosis for the shutdown condition has the same strong anti-interference and certainty of conclusion as the startup condition, thus comprehensively improving the reliability and engineering applicability of the method in different action directions.

[0051] The method for determining guide vane jamming in a turbine governor according to the embodiments of this disclosure obtains the given opening degree and the actual opening degree of the guide vane in response to the issuance of an action command for the guide vane; determines the deviation value between the given opening degree and the actual opening degree; and, if the deviation value meets preset conditions, obtains the opening and closing oil pressures of the guide vane servo chamber; and determines whether the guide vane is jammed based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure. By directly monitoring the matching relationship between the guide vane position deviation and the servo drive oil pressure state, the complex investigation of the action state of intermediate links such as solenoid valves and pressure regulating valves is skipped, fundamentally simplifying the judgment logic. Only a few key sensors are needed to achieve fast and accurate jamming judgment, significantly reducing system cost and complexity, improving the real-time performance and reliability of the judgment, and effectively avoiding misjudgments caused by sensor failures in intermediate links or abnormal hydraulic circuits, providing a reliable guarantee for the safe operation and rapid fault handling of the power station.

[0052] Figure 3 This is a block diagram illustrating a guide vane jamming determination device for a water turbine governor according to an exemplary embodiment. (Refer to...) Figure 3 The device includes a first acquisition unit 301, a first determination unit 302, a second acquisition unit 303, and a second determination unit 304.

[0053] The first acquisition unit 301 is used to acquire the given opening degree of the guide vane and the actual opening degree of the guide vane in response to the issuance of the action command for the guide vane. The first determining unit 302 is used to determine the deviation value between the given opening degree of the guide vane and the actual opening degree of the guide vane; The second acquisition unit 303 is used to acquire the opening oil pressure and closing oil pressure of the guide vane relay chamber when the deviation value meets the preset conditions. The second determining unit 304 is used to determine whether the guide vane is stuck based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure.

[0054] In some embodiments of this application, the first determining unit 302 may be specifically used to: calculate the difference between the given opening degree of the guide vane and the actual opening degree of the guide vane to obtain the deviation value.

[0055] In some embodiments of this application, the second acquisition unit 303 may specifically be used for: Obtain the preset opening deviation threshold; If the absolute value of the deviation is greater than the preset opening threshold, it is determined that the deviation meets the preset conditions, and the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained.

[0056] In some embodiments of this application, the second determining unit 304 may be specifically used to: determine that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold when the sign of the deviation value is positive, and determine that the guide vane is stuck.

[0057] In some embodiments of this application, the second determining unit 304 may be specifically used to: determine that the closed chamber oil pressure is greater than the first pressure threshold and the open chamber oil pressure is less than the second pressure threshold when the deviation value is negative, and determine that the guide vane is stuck.

[0058] In some embodiments of this application, the second acquisition unit 303 may be specifically used to: determine that the deviation values ​​within a first preset time period all meet the preset conditions when the deviation values ​​meet the preset conditions, and acquire the opening oil pressure and closing oil pressure of the guide vane relay chamber.

[0059] In some embodiments of this application, the second determining unit 304 may be specifically used to: determine that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold within a second preset time period, and determine that the guide vane is stuck.

[0060] In some embodiments of this application, the second determining unit 304 may be specifically used to: determine that the closing chamber oil pressure is greater than the first pressure threshold and the opening chamber oil pressure is less than the second pressure threshold within a second preset time period, and determine that the guide vane is stuck.

[0061] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0062] The guide vane jamming determination device for a turbine governor proposed in this disclosure, in response to an action command issued for the guide vane, acquires the given opening degree and the actual opening degree of the guide vane; determines the deviation value between the given opening degree and the actual opening degree; and, if the deviation value meets preset conditions, acquires the opening and closing oil pressures of the guide vane servo chamber; and, based on the sign of the deviation value, the opening and closing oil pressures, determines whether the guide vane is jammed. By directly monitoring the matching relationship between the guide vane position deviation and the servo drive oil pressure state, the complex investigation of the action states of intermediate links such as solenoid valves and pressure regulating valves is skipped, fundamentally simplifying the judgment logic. Only a few key sensors are needed to achieve fast and accurate jamming judgment, significantly reducing system cost and complexity, improving the real-time performance and reliability of the judgment, and effectively avoiding misjudgments caused by sensor failures in intermediate links or abnormal hydraulic circuits, providing a reliable guarantee for the safe operation and rapid fault handling of the power station.

[0063] Figure 4 This is a block diagram illustrating an apparatus for determining guide vane jamming in a turbine governor according to an exemplary embodiment. For example, apparatus 400 may be an electronic device, such as a mobile phone, computer, digital broadcasting terminal, messaging device, tablet device, personal digital assistant, etc.

[0064] Reference Figure 4 The device 400 may include one or more of the following components: a processing component 402, a memory 404, a power component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416.

[0065] Processing component 402 typically controls the overall operation of device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0066] Memory 404 is configured to store various types of data to support the operation of device 400. Examples of this data include instructions for any application or method operating on device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0067] The power supply component 406 provides power to the various components of the device 400. The power supply component 406 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 400.

[0068] Multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera and / or a rear-facing camera. When the device 400 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0069] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

[0070] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0071] Sensor assembly 414 includes one or more sensors for providing status assessments of various aspects of device 400. For example, sensor assembly 414 may detect the on / off state of device 400, the relative positioning of components such as the display and keypad of device 400, changes in the position of device 400 or a component of device 400, the presence or absence of user contact with device 400, the orientation or acceleration / deceleration of device 400, and temperature changes of device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0072] Communication component 416 is configured to facilitate wired or wireless communication between device 400 and other devices. Device 400 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0073] In an exemplary embodiment, the apparatus 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0074] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by a processor 420 of the device 400 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0075] In an exemplary embodiment, a computer program product is also provided, including a computer program that implements the above-described method when executed by a processor 420 of the device 400.

[0076] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0077] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for determining guide vane jamming in a water turbine governor, characterized in that, include: In response to the issuance of an action command for the guide vane, the given opening degree of the guide vane and the actual opening degree of the guide vane are obtained; Determine the deviation between the given opening of the guide vane and the actual opening of the guide vane; When the deviation value meets the preset conditions, the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained; Based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure, it is determined whether the guide vane is stuck.

2. The method for determining guide vane jamming in a turbine governor according to claim 1, characterized in that, Determining the deviation between the given opening of the guide vane and the actual opening of the guide vane includes: The difference between the given opening of the guide vane and the actual opening of the guide vane is calculated to obtain the deviation value.

3. The method for determining guide vane jamming in a turbine governor according to claim 1, characterized in that, The step of obtaining the opening and closing oil pressures of the guide vane relay chamber when the deviation value meets the preset conditions includes: Obtain the preset opening deviation threshold; If the absolute value of the deviation is greater than the preset opening threshold, it is determined that the deviation meets the preset condition, and the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained.

4. The method for determining guide vane jamming in a turbine governor according to claim 1, characterized in that, Determining whether the guide vane is stuck based on the sign of the deviation value, the opening hydraulic pressure, and the closing hydraulic pressure includes: If the sign of the deviation value is positive, it is determined that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold, thus determining that the guide vane is stuck.

5. The method for determining guide vane jamming in a turbine governor according to claim 1, characterized in that, Determining whether the guide vane is stuck based on the sign of the deviation value, the opening hydraulic pressure, and the closing hydraulic pressure includes: If the deviation value is negative, it is determined that the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold, thus determining that the guide vane is stuck.

6. The method for determining guide vane jamming in a turbine governor according to claim 1, characterized in that, The step of obtaining the opening and closing oil pressures of the guide vane relay chamber when the deviation value meets the preset conditions includes: If the deviation value meets the preset conditions, it is determined that the deviation value within the first preset time period meets the preset conditions, and the opening oil pressure and closing oil pressure of the guide vane relay chamber are obtained.

7. The method for determining guide vane jamming in a turbine governor according to claim 4, characterized in that, The step of determining that the guide vane is stuck includes determining that the opening oil pressure is greater than a first pressure threshold and the closing oil pressure is less than a second pressure threshold. If it is determined that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold, and it is determined that the opening oil pressure is greater than the first pressure threshold and the closing oil pressure is less than the second pressure threshold within a second preset time period, then it is determined that the guide vane is stuck.

8. The method for determining guide vane jamming in a turbine governor according to claim 5, characterized in that, The step of determining that the guide vane is stuck includes determining that the closed-chamber oil pressure is greater than a first pressure threshold and the open-chamber oil pressure is less than a second pressure threshold. If it is determined that the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold, and it is determined that the closed-chamber oil pressure is greater than the first pressure threshold and the open-chamber oil pressure is less than the second pressure threshold within a second preset time period, then it is determined that the guide vane is stuck.

9. A device for determining guide vane jamming in a water turbine governor, characterized in that, include: The first acquisition unit is used to acquire the given opening degree of the guide vane and the actual opening degree of the guide vane in response to the issuance of the action command for the guide vane; The first determining unit is used to determine the deviation value between the given opening of the guide vane and the actual opening of the guide vane; The second acquisition unit is used to acquire the opening oil pressure and closing oil pressure of the guide vane relay chamber when the deviation value meets the preset conditions. The second determining unit is used to determine whether the guide vane is stuck based on the sign of the deviation value, the opening oil pressure, and the closing oil pressure.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described in any one of claims 1 to 8.

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