Dead zone detection method and device for water turbine governor
By conducting forward and reverse dead zone tests on the turbine speed governor, calculating the dead zone value and comparing the mechanical allowable range, the control accuracy of the speed governor guide vane is solved, and the operating performance and safety of the turbine are improved.
Patent Information
- Application Number
- CN202510818912.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, the control accuracy and measurement accuracy of the guide vane control device of the turbine speed regulator are affected by the connection of mechanical components, resulting in the adjustment performance and the quality of the frequency regulation operation that does not meet the requirements, affecting the operating performance and safety of the turbine.
By determining the given control information of the first and second openings of the turbine, conducting forward and reverse dead zone tests, calculating the critical value of the guide vane opening, determining the dead zone value of the turbine speed controller, and comparing it with the allowable dead zone range of the machine to generate fault alarm information.
Accurately detect the status of the turbine, optimize the opening control of the speed regulator guide vane, improve the quality of the frequency regulation operation, inspect the installation process and maintenance quality of mechanical components, and provide important data support.
Smart Images
Figure CN120487469A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of water turbine detection, and in particular to a method and device for detecting a dead zone of a water turbine governor. Background Art
[0002] The guide vane opening is one of the key parameters of the hydropower station's speed governor system. Traditionally, the displacement of the relay is generally used as the basis for measuring the guide vane opening. However, there are mechanical components such as control rings and connecting rods between the relay and the guide vane. Therefore, the speed governor actually controls the displacement of the relay, not the actual opening of the guide vane. The connection of mechanical components will have a certain impact on the control accuracy and measurement accuracy of the guide vane. This is manifested in the fact that during the speed governor's adjustment process, the relay can move to the target value adjustment amount, but when it is transmitted to the guide vane through the water guide mechanism, there is a phenomenon that the actual movement amount is insufficient or actually does not move. This makes the speed governor system's adjustment performance and the quality of the primary frequency regulation action fail to meet the requirements, seriously affecting the operating performance and safety of the turbine. Therefore, how to accurately measure the dead zone of the turbine speed governor to improve the adjustment control accuracy is one of the problems that need to be solved in this field. Summary of the Invention
[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.
[0004] To this end, a first embodiment of the present disclosure provides a dead zone detection method for a turbine speed governor, comprising:
[0005] Determining first guide vane opening given control information and second guide vane opening given control information of the hydraulic turbine, wherein the first guide vane opening given control information takes a first given reference value as an initial value and steps the opening in a positive direction according to a preset step size, and the second guide vane opening given control information takes a second given reference value as an initial value and steps the opening in a negative direction according to a preset step size;
[0006] performing a positive dead zone test on a turbine whose guide vane opening is at a preset reference opening value according to the first opening setting control information, and determining the first opening setting control information corresponding to the first response of the guide vane opening during the positive dead zone test as a first critical value;
[0007] performing a reverse dead zone test on the turbine whose guide vane opening is at the preset reference opening value according to the second opening setting control information, and determining the second opening setting control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value;
[0008] The dead zone value of the turbine governor is determined according to the first given reference value, the first critical value, the second given reference value and the second critical value.
[0009] In some embodiments of the present disclosure, determining the dead zone value of the turbine speed governor based on the first given reference value, the first critical value, the second given reference value and the second critical value includes: determining the difference between the first given reference value and the first critical value as the forward dead zone value; determining the difference between the second given reference value and the second critical value as the reverse dead zone value; and performing a sum operation on the forward dead zone value and the reverse dead zone value to obtain the dead zone value.
[0010] In some embodiments of the present disclosure, the method further includes: comparing the dead zone value with a mechanically allowable dead zone range to obtain a state detection result of the turbine.
[0011] In some embodiments of the present disclosure, the dead zone value is compared with the mechanical allowable dead zone range to obtain a status detection result of the turbine, including: if the dead zone value exceeds the mechanical allowable dead zone range, determining that the turbine has a mechanical fault; if the dead zone value does not exceed the mechanical allowable dead zone range, comparing the dead zone value with a normal dead zone range, and the normal dead zone range includes the mechanical allowable dead zone range; if the dead zone value exceeds the normal dead zone range, determining that the turbine has a control fault; if the dead zone value does not exceed the normal dead zone range, determining that the turbine does not have a fault.
[0012] In some embodiments of the present disclosure, after determining that the turbine has a mechanical fault or a control fault, the method further includes: generating a fault alarm message, and sending the mechanical fault alarm message to a terminal device held by a staff member.
[0013] A second embodiment of the present disclosure provides a dead zone detection device for a turbine speed governor, comprising:
[0014] a first determining module, configured to determine first guide vane opening given control information and second guide vane opening given control information of the hydraulic turbine, wherein the first guide vane opening given control information uses a first given reference value as an initial value and steps the opening in a positive direction according to a preset step length; and the second guide vane opening given control information uses a second given reference value as an initial value and steps the opening in a negative direction according to a preset step length;
[0015] a forward test module, configured to perform a forward dead zone test on a turbine having a guide vane opening at a preset reference opening value according to the first opening given control information, and determine the first opening given control information corresponding to the first response of the guide vane opening during the forward dead zone test as a first critical value;
[0016] a reverse test module, configured to perform a reverse dead zone test on the turbine when the guide vane opening is at the preset reference opening value according to the second opening given control information, and determine the second opening given control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value;
[0017] The second determining module is configured to determine the dead zone value of the turbine governor according to the first given reference value, the first critical value, the second given reference value, and the second critical value.
[0018] In some embodiments of the present disclosure, the second determination module is specifically used to: determine the difference between the first given reference value and the first critical value as the forward dead zone value; determine the difference between the second given reference value and the second critical value as the reverse dead zone value; and perform a sum operation on the forward dead zone value and the reverse dead zone value to obtain the dead zone value.
[0019] In some embodiments of the present disclosure, the device further includes a third determination module; wherein the third determination module is used to compare the dead zone value with the mechanical allowable dead zone range to obtain a state detection result of the turbine.
[0020] In some embodiments of the present disclosure, the third determination module is specifically used to: if the dead zone value exceeds the mechanical allowable dead zone range, determine that the turbine has a mechanical fault; if the dead zone value does not exceed the mechanical allowable dead zone range, compare the dead zone value with a normal dead zone range, and the normal dead zone range includes the mechanical allowable dead zone range; if the dead zone value exceeds the normal dead zone range, determine that the turbine has a control fault; if the dead zone value does not exceed the normal dead zone range, determine that the turbine does not have a fault.
[0021] In some embodiments of the present disclosure, an alarm module is further included; wherein, the alarm module is used to: after determining that there is a mechanical fault or a control fault in the turbine, generate a fault alarm message, and send the mechanical fault alarm message to a terminal device held by a staff member.
[0022] A third embodiment of the present disclosure provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;
[0023] The memory stores computer-executable instructions;
[0024] The processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect.
[0025] The fourth aspect of the present disclosure provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, which are used to implement the method described in the first aspect when executed by a processor.
[0026] The dead zone detection method for a turbine governor provided by the present invention obtains the dead zone value of the turbine governor through a dead zone test of the turbine, and accurately detects the turbine status based on the dead zone value, providing important data support and research auxiliary basis for optimizing the precise control of the guide vane opening of the hydropower station governor, improving the quality of the primary frequency regulation action of the turbine governor, and inspecting the installation process and maintenance quality of mechanical components.
[0027] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0029] Figure 1 A schematic flow chart of a dead zone detection method for a turbine speed governor provided by an embodiment of the present disclosure;
[0030] Figure 2 A schematic diagram of an angular displacement sensor bracket and supporting tooling provided in an embodiment of the present disclosure;
[0031] Figure 3 A schematic diagram of a dead zone detection device for a turbine speed governor provided in an embodiment of the present disclosure. DETAILED DESCRIPTION
[0032] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.
[0033] Specifically, the dead zone detection method and device of a turbine speed governor according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings.
[0034] Figure 1 This is a flow chart of a dead zone detection method for a turbine speed governor provided by an embodiment of the present disclosure. Figure 1 As shown, the dead zone detection method of the turbine speed governor may include the following steps:
[0035] Step 101, determine the first opening given control information and the second opening given control information of the turbine, the first guide vane opening given control information takes the first given reference value as the initial value, and the opening steps in the positive direction according to the preset step size, and the second opening given control information takes the second given reference value as the initial value, and the opening steps in the reverse direction according to the preset step size.
[0036] The first guide vane opening control information and the second guide vane opening control information serve as control instructions for controlling the turbine opening. For example, the first guide vane opening control information may have an initial value of A1% of the first given reference value and may step in a positive direction at a preset step size of +0.01%. The second guide vane opening control information may have an initial value of A3% of the second given reference value and may step in a negative direction at a preset step size of -0.01%.
[0037] Step 102: Perform a positive dead zone test on the turbine with the guide vane opening at a preset reference opening value according to the first opening given control information, and determine the first opening given control information corresponding to the first response of the guide vane opening during the positive dead zone test as a first critical value.
[0038] In the disclosed embodiments, to improve the accuracy of the deadband test, the forward and reverse deadband tests use the same reference opening value and are performed at the same initial opening. As an example, the preset reference opening value can be 50%. The guide vane opening response is the actual change in guide vane opening under the control of the given opening control information. For the forward deadband test, for example, |Y2% - Y1%| > 0, where Y1% is the preset reference opening value and Y2% is the guide vane opening value at the initial response.
[0039] During the positive dead band test, the guide vane opening is controlled with the first opening given control information as input, with the first given reference value A1% as the initial value, and the opening is stepped in the positive direction according to the preset step size. During the control process, the turbine guide vane opening is detected in real time. When the first opening given control information is gradually accumulated from the first given reference value A1% to A2%, the guide vane opening responds for the first time. The first opening given control information A2% corresponding to the first response of the guide vane opening during the positive dead band test is determined as the first critical value.
[0040] Step 103: Perform a reverse dead zone test on the turbine with the guide vane opening at a preset reference opening value according to the second opening given control information, and determine the second opening given control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value.
[0041] During the reverse dead zone test, the guide vane opening is controlled with the second opening given control information as input, the second given reference value A3% is used as the initial value, and the opening is stepped in the reverse direction according to the preset step size. During the control process, the turbine guide vane opening is detected in real time. When the second opening given control information is gradually reduced from the first given reference value A3% to A4%, the guide vane opening responds for the first time. The second opening given control information A4% corresponding to the first response of the guide vane opening during the reverse dead zone test is determined as the second critical value.
[0042] It should be noted that the present disclosure does not limit the execution order of step 102 and step 103. After executing the forward dead band test in step 102, the guide vane opening can be restored to a preset reference opening value before executing the reverse dead band test in step 103. Alternatively, after executing the reverse dead band test in step 103, the guide vane opening can be restored to a preset reference opening value before executing the forward dead band test in step 102.
[0043] Step 104 : determining a dead zone value of the turbine governor according to the first given reference value, the first critical value, the second given reference value, and the second critical value.
[0044] In some embodiments of the present disclosure, the difference between the first given reference value A1% and the first critical value A2% may be determined as the positive dead zone value D + %=|A2%-A1%|, the difference between the second given reference value A3% and the second critical value A4% is determined as the reverse dead zone value D - %=|A4%-A3%|. Sum the forward dead zone value and the reverse dead zone value to get the dead zone value D total =D + %+D - %.
[0045] Optionally, in order to reduce random errors, in the embodiment of the present disclosure, multiple forward dead zone tests and reverse dead zone tests may be performed on the turbine to obtain multiple reference dead zone values. The average value of the reference dead zone values obtained by the multiple measurements is used as the dead zone value of the turbine governor:
[0046]
[0047] Among them, D avg is the dead zone value, D total i is the reference dead zone value obtained from the i-th measurement, and n is the number of measurements.
[0048] By implementing the embodiments of the present disclosure, the dead zone test of the turbine is performed to obtain an accurate dead zone value of the turbine governor, which provides important data support and research auxiliary basis for optimizing the precise control of the guide vane opening of the hydropower station governor, improving the quality of the primary frequency regulation action of the turbine governor, and inspecting the installation process of mechanical components and the maintenance quality.
[0049] In some embodiments of the present disclosure, after determining the dead zone value of the speed regulator, the dead zone value may be compared with the allowable dead zone range of the machinery to obtain a state detection result of the turbine.
[0050] In the embodiment of the present disclosure, if the dead zone value D total If the dead zone value D1 is exceeded, it can be determined that the turbine has a mechanical fault, and a mechanical fault alarm message is generated based on the fault type, and the mechanical fault alarm message is sent to the terminal device held by the staff to accurately locate the current mechanical problem of the turbine. total If the dead zone value D1 is greater than the maximum value of the mechanical allowable dead zone range, it means that the current dead zone is too large, which affects the speed governor's control accuracy on the guide vanes and the quality of the primary frequency regulation. total If the value is less than the minimum allowable mechanical deadband range D1, it indicates that the current deadband is too small, possibly due to tight mechanical connections and high friction, causing mechanical wear and affecting the life of turbine components. Therefore, the deadband value can provide a reliable auxiliary basis for turbine status detection.
[0051] If the dead zone value D total If the dead zone value D1 is not exceeded, it can be ruled out that the turbine has a mechanical fault. The dead zone value is further compared with the normal dead zone value D2 to confirm whether a non-mechanical fault has occurred. Among them, the normal dead zone value includes the mechanical allowable dead zone value. If the dead zone value D total If the dead zone range D1 is not exceeded but the normal dead zone range D2 is exceeded, it is determined that a control fault exists in the turbine. A control fault alarm message is generated based on the fault type, and the mechanical fault alarm message is sent to the terminal device held by the staff to optimize the control of the turbine from the perspective of improving the control accuracy.
[0052] If the dead zone value D total If the normal dead zone range D2 is not exceeded, it can be determined that there is no fault in the turbine.
[0053] In some embodiments, the method provided by the present disclosure can be applied to various scenarios such as primary frequency regulation testing, disassembly and assembly quality inspection, fault troubleshooting, guide vane opening control optimization, etc. For example, the dead zone value of the turbine speed governor is used as an auxiliary basis to evaluate the quality of primary frequency regulation and determine whether the guide vane opening can respond to the control instruction in time. Alternatively, in a scenario where the equipment needs to be disassembled and reassembled, the reinstallation quality is evaluated by the dead zone value. Alternatively, when a device fails, mechanical problems or control problems are checked by the dead zone value to help maintenance personnel quickly locate the cause of the failure. Alternatively, when the guide vane control accuracy cannot meet the control requirements, an optimization plan is determined based on the dead zone value, and a quick decision is made on the optimization direction, either in terms of turbine electromechanical installation or control optimization.
[0054] By implementing the embodiments of the present disclosure, the dead zone value of the turbine governor is obtained by performing a dead zone test on the turbine, and the turbine status is accurately detected based on the dead zone value, providing important data support and research auxiliary basis for optimizing the precise control of the guide vane opening of the hydropower station governor, improving the quality of the primary frequency regulation action of the turbine governor, and inspecting the installation process and maintenance quality of mechanical components.
[0055] In order to improve the accuracy of the turbine dead zone value and accurately detect the moment when the turbine opening first responds, in some embodiments of the present disclosure, an angular displacement sensor can be used to measure the actual guide vane opening. Among them, the hardware configuration for detection includes an angular displacement sensor bracket and supporting tooling, an angular displacement sensor, and a data acquisition unit. According to the size of the on-site guide vane transmission component, a customized and installed angular displacement sensor bracket is used. The angular displacement sensor is installed on the guide vane shaft arm end cover bolt using the bracket supporting tooling. The collected guide vane rotation angle analog value is then sent to the data acquisition unit through the sensor. The data acquisition unit is an oscilloscope, which can be used for data recording, analysis, and storage.
[0056] Figure 2 This is a schematic diagram of an angular displacement sensor bracket and supporting tooling provided by an embodiment of the present disclosure. Figure 2 As shown, the angular displacement sensor bracket and supporting tooling include [1] a fixed base, [2] a horizontal adjustment plate, [3] a vertical adjustment plate, [4] a customized coupling, [5] a guide vane end retainer, and [6] an angular displacement sensor.
[0057] Among them, [1] the fixed base adopts an "I"-shaped structure to enhance the overall stability. The bottom surface is fixed to the non-moving part (top cover) near the crank arm measurement position by welding. [2] The horizontal adjustment plate adopts an "L"-shaped structure and is provided with a reinforcing rib plate and an adjustment waist-shaped hole. It is installed on the [1] fixed base through the waist hole. The waist hole can adjust the horizontal position back and forth within a certain range, which is convenient for fine-tuning the horizontality of the angular displacement sensor after the base is fixed. [3] The vertical adjustment plate also adopts an "L"-shaped structure and is provided with a reinforcing rib plate and an adjustment waist-shaped hole. It is installed on the [2] horizontal adjustment plate through the waist hole, which is convenient for fine-tuning the verticality of the angular displacement sensor. [4] A customized coupling connects the [5] guide vane end holder and the [6] angular displacement sensor. The customized coupling adopts a flexible design to eliminate manual installation errors to the greatest extent. Finally, the [6] angular displacement sensor is fixed on the [3] vertical adjustment plate.
[0058] The supporting tooling includes the following steps: [5] The guide vane end retainer adopts a hexagonal sleeve design, the size of which matches the size of the guide vane arm end cover bolt, and a screw reinforcement hole is provided on the vertical surface of the sleeve to reinforce the contact surface between the retainer and the end cover bolt to eliminate installation tolerance.
[0059] Figure 3Schematic diagram of a dead zone detection device for a turbine speed governor provided by an embodiment of the present disclosure. Figure 3 As shown, the dead zone detection device for a turbine speed governor includes: a first determination module 301 , a forward test module 302 , a reverse test module 303 , a second determination module 304 and a third determination module 305 .
[0060] The first determining module 301 is configured to determine first and second guide vane opening given control information of the turbine, wherein the first guide vane opening given control information is initialized by a first given reference value and the opening is stepped in a positive direction according to a preset step size, and the second guide vane opening given control information is initialized by a second given reference value and the opening is stepped in a negative direction according to a preset step size.
[0061] a forward test module 302 configured to perform a forward deadband test on a turbine having a guide vane opening at a preset reference opening value according to the first opening given control information, and to determine the first opening given control information corresponding to the first response of the guide vane opening during the forward deadband test as a first critical value;
[0062] a reverse test module 303 configured to perform a reverse dead zone test on a turbine having a guide vane opening at a preset reference opening value according to the second opening setting control information, and determine the second opening setting control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value;
[0063] A second determining module 304 is configured to determine a dead zone value of a turbine governor according to the first given reference value, the first critical value, the second given reference value, and the second critical value;
[0064] In some embodiments of the present disclosure, the second determination module 304 is specifically used to: determine the difference between the first given reference value and the first critical value as the forward dead zone value; determine the difference between the second given reference value and the second critical value as the reverse dead zone value; and perform a sum operation on the forward dead zone value and the reverse dead zone value to obtain a dead zone value.
[0065] In some embodiments of the present disclosure, Figure 3 On the basis of the illustrated embodiment, the dead zone detection device of the turbine speed governor further includes a third determination module; wherein the third determination module is used to compare the dead zone value with the mechanical allowable dead zone range to obtain a state detection result of the turbine.
[0066] In some embodiments of the present disclosure, the third determination module is specifically used to: if the dead zone value exceeds the mechanical allowable dead zone range, determine that the turbine has a mechanical fault; if the dead zone value does not exceed the mechanical allowable dead zone range, compare the dead zone value with a normal dead zone range, and the normal dead zone range includes the mechanical allowable dead zone range; if the dead zone value exceeds the normal dead zone range, determine that the turbine has a control fault; if the dead zone value does not exceed the normal dead zone range, determine that the turbine does not have a fault.
[0067] In some embodiments of the present disclosure, Figure 3 Based on the illustrated embodiment, the dead zone detection device for a turbine speed governor further includes an alarm module, wherein the alarm module is configured to generate a fault alarm message upon determining that a mechanical fault or a control fault exists in the turbine, and transmit the mechanical fault alarm message to a terminal device held by a staff member.
[0068] In order to implement the above embodiments, the present disclosure also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.
[0069] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.
[0070] In order to implement the above embodiments, the present disclosure further provides a computer program product, including a computer program, which implements the methods provided in the above embodiments when executed by a processor.
[0071] In the descriptions of the aforementioned embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.
[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0073] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.
[0074] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.
[0075] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.
[0076] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.
[0077] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.
[0078] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. A person of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.
Claims
1. A dead zone detection method for a turbine speed governor, characterized in that: The following steps are involved: Determining first guide vane opening given control information and second guide vane opening given control information of the hydraulic turbine, wherein the first guide vane opening given control information takes a first given reference value as an initial value and steps the opening in a positive direction according to a preset step size, and the second guide vane opening given control information takes a second given reference value as an initial value and steps the opening in a negative direction according to a preset step size; performing a positive dead zone test on a turbine whose guide vane opening is at a preset reference opening value according to the first opening setting control information, and determining the first opening setting control information corresponding to the first response of the guide vane opening during the positive dead zone test as a first critical value; performing a reverse dead zone test on the turbine whose guide vane opening is at the preset reference opening value according to the second opening setting control information, and determining the second opening setting control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value; The dead zone value of the turbine governor is determined according to the first given reference value, the first critical value, the second given reference value and the second critical value.
2. The method according to claim 1, characterized in that Determining the dead zone value of the turbine governor according to the first given reference value, the first critical value, the second given reference value and the second critical value includes: determining a difference between the first given reference value and the first critical value as a positive dead zone value; determining a difference between the second given reference value and the second critical value as a reverse dead zone value; A sum operation is performed on the forward dead zone value and the reverse dead zone value to obtain the dead zone value.
3. The method according to claim 1, characterized in that Also includes: The dead zone value is compared with the mechanical allowable dead zone range to obtain the state detection result of the turbine.
4. The method according to claim 3, characterized in that The step of comparing the dead zone value with the allowable dead zone range of the machine to obtain a state detection result of the turbine includes: If the dead zone value exceeds the mechanical allowable dead zone range, it is determined that a mechanical fault exists in the turbine; If the dead zone value does not exceed the mechanical allowable dead zone range, comparing the dead zone value with a normal dead zone range, wherein the normal dead zone range includes the mechanical allowable dead zone range; If the dead zone value exceeds the normal dead zone range, it is determined that a control fault exists in the turbine; If the dead band value does not exceed the normal dead band range, it is determined that there is no fault in the water turbine.
5. The method according to claim 4, characterized in that After determining that the turbine has a mechanical fault or a control fault, the method further includes: Generate fault alarm information and send the mechanical fault alarm information to the terminal device held by the staff.
6. A dead zone detection device for a turbine speed governor, characterized in that: include: a first determining module, configured to determine first guide vane opening given control information and second guide vane opening given control information of the hydraulic turbine, wherein the first guide vane opening given control information uses a first given reference value as an initial value and steps the opening in a positive direction according to a preset step length; and the second guide vane opening given control information uses a second given reference value as an initial value and steps the opening in a negative direction according to a preset step length; a forward test module, configured to perform a forward dead zone test on a turbine having a guide vane opening at a preset reference opening value according to the first opening given control information, and determine the first opening given control information corresponding to the first response of the guide vane opening during the forward dead zone test as a first critical value; a reverse test module, configured to perform a reverse dead zone test on the turbine when the guide vane opening is at the preset reference opening value according to the second opening given control information, and determine the second opening given control information corresponding to the first response of the guide vane opening during the reverse dead zone test as a second critical value; The second determining module is configured to determine the dead zone value of the turbine governor according to the first given reference value, the first critical value, the second given reference value, and the second critical value.
7. The device according to claim 6, characterized in that The second determining module is specifically configured to: determining a difference between the first given reference value and the first critical value as a positive dead zone value; determining a difference between the second given reference value and the second critical value as a reverse dead zone value; A sum operation is performed on the forward dead zone value and the reverse dead zone value to obtain the dead zone value.
8. The device according to claim 6, characterized in that It also includes a third determination module; wherein, the third determination module is used to compare the dead zone value with the mechanical allowable dead zone range to obtain a state detection result of the turbine.
9. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 5.
10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 5 when executed by a processor.