System and method for determining guide vane angular displacement opening degree measured value of hydropower station governor

Abstract

The invention provides a system and a method for determining a guide vane angular displacement opening measured value of a hydropower station governor, and the system comprises a plurality of angular displacement sensors which are all used for collecting guide vane angular displacement opening signals of a hydroelectric generating set; the data acquisition unit is used for sending the plurality of guide vane angular displacement opening degree signals to the fault diagnosis module; the fault diagnosis module is used for judging whether each angular displacement sensor has a fault or not and judging the fault type according to the plurality of guide vane angular displacement opening degree signals; the optimization logic module is used for determining an initial guide vane angular displacement opening value or a fault level of the hydroelectric generating set according to whether each angular displacement sensor has a fault or not and the fault type; and the data analysis module is used for determining a guide vane opening measurement value and a fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and a guide vane opening given value in the governor control subsystem. According to the technical scheme provided by the invention, the accuracy of hydropower station governor guide vane opening measurement is improved.

Description

Technical Field

[0001] The present application relates to the field of hydropower station speed governor control, and in particular to a system and method for determining the guide vane angular displacement opening measurement value of a hydropower station speed governor. Background Art

[0002] The guide vane opening is one of the key parameters of the hydropower station speed governor system. The traditional measurement method is to use the servomotor displacement stroke as the basis for measuring the guide vane opening. The speed governor actually uses the servomotor stroke as feedback for closed-loop regulation. However, there are mechanical components such as control rings and connecting rods between the servomotor and the guide vane. In a sense, the speed governor actually controls the servomotor displacement rather than the actual opening of the guide vane. The connection of mechanical components will inevitably produce mechanical dead zones, which will have a certain impact on the measurement accuracy of the guide vanes, causing a deviation between the servomotor displacement and the actual opening of the guide vanes. Therefore, it is urgent to propose a solution that can accurately measure the guide vane angular displacement opening of the hydropower station speed governor. Summary of the invention

[0003] The present application provides a system and method for determining the guide vane angular displacement opening measurement value of a hydropower station speed regulator, so as to at least solve the technical problem of large guide vane angular displacement opening measurement error of a hydropower station speed regulator.

[0004] The first embodiment of the present application proposes a guide vane angular displacement opening measurement value determination system for a hydropower station governor, the guide vane opening measurement system comprising: a plurality of angular displacement sensors, a data acquisition unit, and a governor control subsystem; wherein the governor control subsystem comprises: a fault diagnosis module, an optimization logic module, and a data analysis module;

[0005] The multiple angular displacement sensors are all used to collect the guide vane angular displacement opening signals of the hydropower unit;

[0006] The data acquisition unit is used to send a plurality of guide vane angular displacement opening signals to the fault diagnosis module;

[0007] The fault diagnosis module is used to determine whether each angular displacement sensor has a fault and the fault type according to the plurality of guide vane angular displacement opening signals;

[0008] The preferred logic module is used to determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type;

[0009] The data analysis module is used to determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

[0010] Preferably, the multiple angular displacement sensors are installed on the guide vane shaft elbow end cover bolts.

[0011] Preferably, the speed regulator control subsystem comprises: a first speed regulator control subsystem and a second speed regulator control subsystem;

[0012] The first speed regulator control subsystem and the second speed regulator control subsystem both include: a fault diagnosis module, an optimization logic module and a data analysis module;

[0013] The first speed regulator control subsystem and the second speed regulator control subsystem adopt parallel redundant control, and when a secondary fault occurs, the first speed regulator control subsystem and the second speed regulator control subsystem are switched without interruption.

[0014] Wherein, there are N angular displacement sensors, An angular displacement sensor is connected to the first speed regulator control subsystem, and the remaining An angular displacement sensor is connected to the second speed regulator control subsystem.

[0015] Furthermore, the fault diagnosis module is also used for:

[0016] When the positioning parameter collected by the angular displacement sensor when the guide vane is fully closed is greater than or equal to the positioning parameter when the guide vane is fully open, it is determined that the angular displacement sensor has a positioning loss fault, and the fault code is 01;

[0017] When the guide vane angular displacement opening value collected by the angular displacement sensor is less than the preset minimum fault threshold or the guide vane angular displacement opening value is greater than the preset maximum fault threshold, and the first timing time is greater than the disconnection alarm delay threshold, it is determined that the angular displacement sensor has a disconnection fault, and the fault code is 02;

[0018] When the guide vane angular displacement opening value collected by the angular displacement sensor does not change in adjacent cycles, and the second timing time is greater than the dead value alarm delay threshold, it is determined that the angular displacement sensor has a sampling dead value fault, and the fault code is 03;

[0019] When the angular displacement sensor has no positioning loss fault and disconnection fault, within the jump threshold detection time, if the deviation of the per-unit value of the guide vane sampling of the angular displacement sensor between adjacent cycles is greater than the jump threshold amplitude, it is counted once. If the accumulated number of times within the jump threshold detection time is greater than the jump alarm threshold number, it is judged that the angular displacement sensor has a jump fault, and the fault code is 04;

[0020] Wherein, guide vane sampling per unit value = (guide vane angular displacement opening value - minimum positioning parameter) * per unit range / (maximum positioning parameter - minimum positioning parameter);

[0021] When the angular displacement sensor has a non-positioning loss fault or a disconnection fault, the guide vane sampling per unit value of the angular displacement sensor is less than the lower threshold or greater than the upper threshold, and the third timing time is greater than the over-limit alarm delay threshold, it is determined that the angular displacement sensor has an over-limit fault, and the fault code is 05;

[0022] When the angular displacement sensors connected to the first speed governor control subsystem or the second speed governor control subsystem have no positioning loss fault, line break fault, dead value fault, jump fault, or over-limit fault, compare whether there is a deviation in the guide vane angular displacement opening value of each angular displacement sensor. If there is a deviation, and the fourth timing time is greater than the deviation alarm delay threshold, it is determined that the angular displacement sensor corresponding to the deviation has a deviation fault, and the fault code is 06.

[0023] Furthermore, the preferred logic module is also used for:

[0024] When the number of angular displacement sensor failures is greater than or equal to 1 and less than When the guide vane angular displacement opening value corresponding to the first angular displacement sensor is found in the angular displacement sensors that are not faulty according to the preset priority order, and the guide vane angular displacement opening value corresponding to the first angular displacement sensor found is used as the initial guide vane angular displacement opening value;

[0025] When the number of angular displacement sensor failures is equal to When , it is determined that a secondary fault occurs;

[0026] When the number of failures of the angular displacement sensor is equal to 0, compare whether there is a deviation in the guide vane angular displacement opening values ​​of each angular displacement sensor and whether the deviation is greater than a first deviation threshold; if not, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value; if so, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor that has no deviation according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value.

[0027] Furthermore, the data analysis module is also used to:

[0028] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is no deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0029] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is no deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, then the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0030] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, between the guide vane set value in the speed governor control system and the initial guide vane angular displacement opening value, and between the guide vane set value in the speed governor control system and the guide vane servomotor displacement opening value, a secondary fault is determined to have occurred.

[0031] Furthermore, the data analysis module is also used to:

[0032] When a secondary fault occurs, the second speed regulator control subsystem is switched to primary use.

[0033] The second aspect of the present application provides a method for determining a guide vane angular displacement opening measurement value of a hydropower station governor, the method comprising:

[0034] Multiple angular displacement sensors are used to collect the guide vane angular displacement opening signals of the hydropower unit;

[0035] Determining whether each angular displacement sensor is faulty and the fault type according to the collected multiple guide vane angular displacement opening signals;

[0036] Determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type;

[0037] The guide vane opening measurement value and the fault level of the hydropower station governor are determined based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

[0038] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the second aspect of the application is implemented.

[0039] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the second aspect of the present application.

[0040] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0041] The present application proposes a system and method for determining the guide vane angular displacement opening measurement value of a hydropower station governor, wherein the guide vane opening measurement system comprises: a plurality of angular displacement sensors, a data acquisition unit, and a governor control subsystem; wherein the governor control subsystem comprises: a fault diagnosis module, a preferred logic module, and a data analysis module; the plurality of angular displacement sensors are used to collect guide vane angular displacement opening signals of a hydropower unit; the data acquisition unit is used to send a plurality of guide vane angular displacement opening signals to the fault diagnosis module; the fault diagnosis module is used to determine whether each angular displacement sensor is faulty and the fault type according to the plurality of guide vane angular displacement opening signals; the preferred logic module is used to determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type; the data analysis module is used to determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value, and the guide vane opening given value in the governor control subsystem. The technical solution proposed in the present application effectively reduces the measurement deviation caused by the mechanical dead zone generated between the connecting parts of the guide vane transmission mechanism, thereby improving the accuracy of the guide vane opening measurement of the hydropower station governor.

[0042] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0044] Figure 1 A first structural diagram of a system for determining a guide vane angular displacement opening measurement value of a hydropower station governor provided according to an embodiment of the present application;

[0045] Figure 2 A structural diagram of a speed regulator control subsystem provided according to an embodiment of the present application;

[0046] Figure 3 A flowchart of fault type determination provided according to an embodiment of the present application;

[0047] Figure 4 A flowchart for optimizing the guide vane angular displacement opening value according to an embodiment of the present application;

[0048] Figure 5 A data analysis flow chart provided according to an embodiment of the present application;

[0049] Figure 6A schematic diagram of the software and hardware structure of a system for determining the guide vane angular displacement opening measurement value of a hydropower station governor provided according to an embodiment of the present application;

[0050] Figure 7 A detailed schematic diagram of the software and hardware structure of a system for determining the guide vane angular displacement opening value of a hydropower station governor provided according to an embodiment of the present application;

[0051] Figure 8 A flow chart of a method for determining a guide vane angular displacement opening measurement value of a hydropower station governor provided according to one embodiment of the present application;

[0052] Reference numerals

[0053] Angular displacement sensor 1, data acquisition unit 2, speed regulator control subsystem 3, fault diagnosis module 3-1, optimization logic module 3-2, data analysis module 3-3, first speed regulator control subsystem 3-4 and second speed regulator control subsystem 3-5. DETAILED DESCRIPTION

[0054] Embodiments of the present application are described in detail below, and examples of the embodiments 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 application, and should not be construed as limiting the present application.

[0055] The present application proposes a system and method for determining the guide vane angular displacement opening measurement value of a hydropower station governor, wherein the guide vane opening measurement system includes: multiple angular displacement sensors, a data acquisition unit, and a governor control subsystem; wherein the governor control subsystem includes: a fault diagnosis module, a preferred logic module, and a data analysis module; the multiple angular displacement sensors are all used to collect guide vane angular displacement opening signals of a hydropower unit; the data acquisition unit is used to send multiple guide vane angular displacement opening signals to the fault diagnosis module; the fault diagnosis module is used to determine whether each angular displacement sensor is faulty and the fault type according to multiple guide vane angular displacement opening signals; the preferred logic module is used to determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type; the data analysis module is used to determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value, and the guide vane opening given value in the governor control subsystem. The technical solution proposed in the present application effectively reduces the measurement deviation caused by the mechanical dead zone generated between the connecting parts of the guide vane transmission mechanism, thereby improving the accuracy of the guide vane opening measurement of the hydropower station governor.

[0056] The following describes, with reference to the accompanying drawings, a system and method for determining the guide vane angular displacement opening measurement value of a hydropower station governor according to an embodiment of the present application.

[0057] Embodiment 1

[0058] Figure 1 The structure diagram of a system for determining the guide vane angular displacement opening value of a hydropower station governor according to one embodiment of the present application is shown in FIG. Figure 1 As shown, the guide vane opening measurement system includes: a plurality of angular displacement sensors 1, a data acquisition unit 2, and a speed governor control subsystem 3; wherein, the speed governor control subsystem 3 includes: a fault diagnosis module 3-1, a preferred logic module 3-2, and a data analysis module 3-3;

[0059] The multiple angular displacement sensors 1 are all used to collect the guide vane angular displacement opening signals of the hydropower unit;

[0060] It should be noted that the multiple angular displacement sensors 1 are installed on the guide vane shaft elbow end cover bolts.

[0061] Among them, the angular displacement sensor is arranged on the guide vane shaft according to the principle of symmetric installation, and then the sensor is installed on the guide vane shaft arm end cover bolt using customized tooling. The angular displacement sensor 1 adopts MEMS technology, magneto-electric induction technology, uses differential array magnetic sensitive elements, and non-contact measurement of the rotating shaft. By sensing the parallel magnetic field strength of the permanent magnet installed at one end of the rotating shaft, the linearity is corrected after MCU processing, and the absolute angular position of the sensor is output within the range of 0 to 360° to simulate the linear displacement of the linear variable differential sensor (LVDT). The non-contact electromagnetic coupling of the rotor gives the sensor infinite resolution, that is, the absolute measurement accuracy reaches near zero degrees, and the multiple angular displacement sensors 1 can be six.

[0062] The data acquisition unit 2 is used to send a plurality of guide vane angular displacement opening signals to the fault diagnosis module;

[0063] It should be noted that the six angular displacement sensors 1 are arranged on the six guide vane shafts according to the principle of symmetry of installation, and are installed on the bolts of the guide vane shaft crank arm end cover by using customized tooling. The data acquisition unit 2 sends the guide vane rotation angle, i.e., the guide vane angular displacement opening, to the governor control subsystem 3 in real time through analog quantity. The governor control system A and B machine controllers, i.e., the first governor control subsystem 3-4 and the second governor control subsystem 3-5, respectively collect three angular displacement analog signals through analog quantity input modules. The sent signals are hard wired, and then equipped with functions such as on-site display of human-computer interaction equipment to complete the configuration of the acquisition unit.

[0064] The fault diagnosis module 3-1 is used to determine whether each angular displacement sensor is faulty and the fault type according to the plurality of guide vane angular displacement opening signals;

[0065] The preferred logic module 3-2 is used to determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type;

[0066] The data analysis module 3-3 is used to determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

[0067] It should be noted that the guide vane rotation angle (hereinafter referred to as angular displacement) sampling data, i.e., the guide vane angular displacement opening, is pre-processed. The fault diagnosis module 3-1 is used to perform a logical judgment on whether the guide vane angular displacement opening sent to the speed governor controller has a fault. The optimal logic module 3-2 then performs a logical judgment on the signal, calculates and optimizes the guide vane opening and fault information for the guide vane control of the speed governor system, and combines the data analysis module 3-3 to perform a logical judgment on the relay displacement guide vane opening under the traditional method, as one of the redundant switching conditions for the guide vane opening sampling, to increase system reliability.

[0068] In the embodiments of the present disclosure, Figure 2 As shown, the speed regulator control subsystem 3 includes: a first speed regulator control subsystem 3-4 and a second speed regulator control subsystem 3-5;

[0069] The first speed regulator control subsystem 3-4 and the second speed regulator control subsystem 3-5 both include: a fault diagnosis module 3-1, a preferred logic module 3-2 and a data analysis module 3-3;

[0070] The first speed regulator control subsystem 3-4 and the second speed regulator control subsystem 3-5 adopt parallel redundant control, and when a secondary fault occurs, the first speed regulator control subsystem 3-4 and the second speed regulator control subsystem 3-5 are switched without interference.

[0071] Wherein, there are N angular displacement sensors, An angular displacement sensor 1 is connected to the first speed regulator control subsystem 3-4, and the remaining An angular displacement sensor 1 is connected to the second speed regulator control subsystem 3-5.

[0072] In the embodiment of the present disclosure, the fault diagnosis module 3-1 is specifically used for:

[0073] When the positioning parameter collected by the angular displacement sensor when the guide vane is fully closed is greater than or equal to the positioning parameter when the guide vane is fully open, it is determined that the angular displacement sensor has a positioning loss fault, and the fault code is 01;

[0074] When the guide vane angular displacement opening value collected by the angular displacement sensor is less than the preset minimum fault threshold or the guide vane angular displacement opening value is greater than the preset maximum fault threshold, and the first timing time is greater than the disconnection alarm delay threshold, it is determined that the angular displacement sensor has a disconnection fault, and the fault code is 02;

[0075] When the guide vane angular displacement opening value collected by the angular displacement sensor does not change in adjacent cycles, and the second timing time is greater than the dead value alarm delay threshold, it is determined that the angular displacement sensor has a sampling dead value fault, and the fault code is 03;

[0076] When the angular displacement sensor has no positioning loss fault and disconnection fault, within the jump threshold detection time, if the deviation of the per-unit value of the guide vane sampling of the angular displacement sensor between adjacent cycles is greater than the jump threshold amplitude, it is counted once. If the accumulated number of times within the jump threshold detection time is greater than the jump alarm threshold number, it is judged that the angular displacement sensor has a jump fault, and the fault code is 04;

[0077] Wherein, guide vane sampling per unit value = (guide vane angular displacement opening value - minimum positioning parameter) * per unit range / (maximum positioning parameter - minimum positioning parameter);

[0078] When the angular displacement sensor 1 has a non-positioning loss fault and a disconnection fault, the guide vane sampling per unit value of the angular displacement sensor is less than the lower threshold or greater than the upper threshold, and the third timing time is greater than the over-limit alarm delay threshold, it is determined that the angular displacement sensor 1 has an over-limit fault, and the fault code is 05; the timing time is the timing when the fault is detected;

[0079] When the angular displacement sensors 1 connected to the first speed governor control subsystem 3-4 or the second speed governor control subsystem 3-5 have no positioning loss fault, line break fault, dead value fault, jump fault, or over-limit fault, compare whether there is a deviation in the guide vane angular displacement opening values ​​of each angular displacement sensor. If there is a deviation, and the fourth timing time is greater than the deviation alarm delay threshold, it is determined that the angular displacement sensor 1 corresponding to the deviation has a deviation fault, and the fault code is 06. The timing time is the timing when the fault is detected.

[0080] It should be noted that the fault diagnosis module 3-1 sets intelligent fault logic judgment for each guide vane angular displacement sensor in the data preprocessing stage, and configures the fault code display so that the maintenance personnel can see the fault alarm category at a glance. These include positioning loss fault, disconnection fault, dead value fault, jump fault, over-limit fault, and deviation fault. The speed governor control system A, B machine, that is, the first speed governor control subsystem 3-4 and the second speed governor control subsystem 3-5 adopt parallel redundant control and serve as backup for each other. The logic configuration is exactly the same. Here, the A machine controller, that is, the first speed governor control subsystem 3-4, is taken as an example, and the B machine, that is, the second speed governor control subsystem 3-5, is the same. The guide vane opening sampling value of the angular displacement sensor No. 1 is A1, the guide vane opening sampling value of the angular displacement sensor No. 2 is A2, and the guide vane opening sampling value of the angular displacement sensor No. 3 is A3.

[0081] For the positioning loss fault, when the minimum positioning parameter is greater than or equal to the maximum positioning parameter, it is judged as the angular displacement sensor positioning loss fault, and the fault code is 01, wherein the minimum positioning parameter is the positioning parameter collected by the angular displacement sensor when the guide vane is fully closed, and the maximum positioning parameter is the positioning parameter collected by the angular displacement sensor when the guide vane is fully open.

[0082] The disconnection fault is that when the sampling value of the angular displacement sensor, i.e., the guide vane angular displacement opening value, is less than the preset minimum fault threshold or the sampling value is greater than the preset maximum fault threshold, and the duration exceeds the disconnection alarm delay threshold, it is determined that the angular displacement sensor is disconnected, and the fault code is 02;

[0083] In the case of the dead value fault, if the sampling value of the angular displacement sensor does not change in adjacent cycles and the duration exceeds the dead value alarm delay threshold, it is judged as the angular displacement sensor sampling dead value fault, and the fault code is 03;

[0084] For the jump fault, when the angular displacement sensor has no positioning loss fault and disconnection fault, within the jump threshold detection time, when the deviation of the angular displacement sensor guide vane sampling per unit value between adjacent cycles is greater than the jump threshold amplitude, it is counted once, and the accumulated number of times within the jump threshold detection time is greater than the jump alarm threshold number, it is judged as the angular displacement sensor jump fault, and the fault code is 04;

[0085] For the above-mentioned over-limit fault, when the angular displacement sensor has no positioning loss fault and disconnection fault, the sampling per unit value of the guide vane of the angular displacement sensor is less than the lower threshold or greater than the upper threshold, and the duration exceeds the over-limit alarm delay threshold, it is judged as the angular displacement sensor over-limit fault, and the fault code is 05;

[0086] The guide vane sampling per unit value is calculated by calculating the analog code value of the angular displacement opening signal sampled by the governor system controller according to the first formula (1) through the positioning parameter, and finally converted into a guide vane opening percentage value;

[0087] Among them, the first formula is:

[0088] Guide vane sampling per unit value = (sampling value - minimum positioning parameter) * per unit range / (maximum positioning parameter - minimum positioning parameter) (1)

[0089] For the deviation fault, when there is no fault code 01-05 for the guide vane angular displacement openings of A1, A2, and A3, A12=|A1-A2| indicates the difference between the guide vane angular displacement opening 1 and the guide vane angular displacement opening 2; A13=|A1-A3| indicates the difference between the guide vane angular displacement opening 1 and the guide vane angular displacement opening 3; A23=|A2-A3| indicates the difference between the guide vane angular displacement opening 2 and the guide vane angular displacement opening 3, and Y is the guide vane angular displacement guide vane opening deviation threshold:

[0090] If A12>Y and A13>Y and A23≤Y, it means there is a deviation between the guide vane angular displacement openings 1 and 2, there is a deviation between the guide vane angular displacement openings 1 and 3, and there is no deviation between the guide vane angular displacement openings 2 and 3. When the duration exceeds the deviation alarm delay threshold, it is judged as a deviation fault of the angular displacement sensor A1, and the fault code is 06;

[0091] If A12>Y and A13≤Y and A23>Y, it means there is a deviation between the guide vane angular displacement openings 1 and 2, there is no deviation between the guide vane angular displacement openings 1 and 3, there is a deviation between the guide vane angular displacement openings 2 and 3, and after the duration exceeds the deviation alarm delay threshold, it is judged as a deviation fault of the angular displacement sensor A2, and the fault code is 06;

[0092] If A12≤Y and A13>Y and A23>Y, it means there is no deviation between guide vane angular displacement openings 1 and 2, there is a deviation between guide vane angular displacement openings 1 and 3, and there is a deviation between guide vane angular displacement openings 2 and 3. When the duration exceeds the deviation alarm delay threshold, it is judged as an angular displacement sensor A3 deviation fault, and the fault code is 06.

[0093] Among them, the flow chart for judging the positioning loss fault, disconnection fault, dead value fault, jump fault, over-limit fault and deviation fault can be as follows: Figure 3 shown.

[0094] In the embodiment of the present disclosure, the preferred logic module 3-2 is also used for:

[0095] When the number of faults of angular displacement sensor 1 is greater than or equal to 1 and less than When the guide vane angular displacement opening value corresponding to the first angular displacement sensor is found in the angular displacement sensors that are not faulty according to the preset priority order, and the guide vane angular displacement opening value corresponding to the first angular displacement sensor found is used as the initial guide vane angular displacement opening value;

[0096] When the number of faults of angular displacement sensor 1 is equal to When , it is determined that a secondary fault occurs;

[0097] When the number of failures of angular displacement sensor 1 is equal to 0, compare whether there is a deviation in the guide vane angular displacement opening values ​​of each angular displacement sensor and whether the deviation is greater than a first deviation threshold; if not, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value; if so, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor that has no deviation according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value.

[0098] It should be noted that if Figure 4 As shown, when the angular displacement sensor fails:

[0099] If the guide vane angular displacement opening of the No. 1 angular displacement sensor has a fault, the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor have no fault, A23≤Y, indicating that there is no deviation between the guide vane angular displacement openings of the No. 2 angular displacement sensor and the No. 3 angular displacement sensor, and A2 is output in the order of priority, otherwise the angular displacement feedback total fault, severe fault, i.e., secondary fault, is reported;

[0100] If the guide vane angular displacement opening of the angular displacement sensor No. 2 fails, the guide vane angular displacement opening of the angular displacement sensor No. 1 and the guide vane angular displacement opening of the angular displacement sensor No. 3 have no faults, A13≤Y, and A1 is output in the order of priority, otherwise a total angular displacement feedback fault, a serious fault, or a secondary fault is reported;

[0101] If the guide vane angular displacement opening of the angular displacement sensor No. 3 is faulty, the guide vane angular displacement opening of the angular displacement sensor No. 1 and the guide vane angular displacement opening of the angular displacement sensor No. 2 are not faulty, A12≤Y, and A1 is output in the order of priority, otherwise a total fault of angular displacement feedback, a serious fault, i.e., a secondary fault, is reported;

[0102] If the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 2 angular displacement sensor are faulty, but the guide vane angular displacement opening of the No. 3 angular displacement sensor is faulty, output A3, otherwise the total angular displacement feedback fault, serious fault, i.e., secondary fault, is reported;

[0103] If the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor are faulty, but the guide vane angular displacement opening of the No. 2 angular displacement sensor is not faulty, output A2, otherwise the total angular displacement feedback fault, i.e., the secondary fault, is reported;

[0104] If the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor are faulty, but the guide vane angular displacement opening of the No. 1 angular displacement sensor is not faulty, output A1, otherwise report the total angular displacement feedback fault, serious fault and;

[0105] If the guide vane angular displacement opening of angular displacement sensor No. 1, the guide vane angular displacement opening of angular displacement sensor No. 2, and the guide vane angular displacement opening of angular displacement sensor No. 3 are all faulty, then a total angular displacement feedback fault, a serious fault, or a secondary fault will be reported.

[0106] like Figure 4 As shown, when the angular displacement sensor has no faults:

[0107] If A12≤Y and A13≤Y and A23≤Y, it means that there is no deviation in the angular displacement openings of the three guide vanes, and A1, A2, and A3 are output, and A1 is output in the order of priority;

[0108] If A12>Y and A13>Y and A23≤Y, it means that there is a deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 2 angular displacement sensor, there is a deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor, and there is no deviation between the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor. It is judged that the deviation of the guide vane angular displacement opening of the No. 1 angular displacement sensor is too large, and A2 is output in the order of priority, reporting a general fault, that is, a first-level fault;

[0109] If A12>Y and A23>Y and A13≤Y, it means that there is a deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 2 angular displacement sensor, there is a deviation between the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor, and there is no deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor. It is judged that the deviation of the guide vane angular displacement opening of the No. 2 angular displacement sensor is too large, and A1 is output in the order of priority, reporting a general fault, that is, a first-level fault;

[0110] If A13>Y and A23>Y and A12≤Y, it means that there is a deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor, there is a deviation between the guide vane angular displacement opening of the No. 2 angular displacement sensor and the guide vane angular displacement opening of the No. 3 angular displacement sensor, and there is no deviation between the guide vane angular displacement opening of the No. 1 angular displacement sensor and the guide vane angular displacement opening of the No. 2 angular displacement sensor. It is judged that the deviation of the guide vane angular displacement opening of the No. 3 angular displacement sensor is too large, and A1 is output in the priority order, reporting a general fault, that is, a first-level fault;

[0111] If A12>Y and A13>Y and A23>Y, it means that there is a deviation between the guide vane angular displacement opening of angular displacement sensor No. 1 and the guide vane angular displacement opening of angular displacement sensor No. 2, there is a deviation between the guide vane angular displacement opening of angular displacement sensor No. 1 and the guide vane angular displacement opening of angular displacement sensor No. 3, and there is a deviation between the guide vane angular displacement opening of angular displacement sensor No. 2 and the guide vane angular displacement opening of angular displacement sensor No. 3. It is judged that the deviations of the guide vane angular displacement opening of angular displacement sensor No. 1, the guide vane angular displacement opening of angular displacement sensor No. 2, and the guide vane angular displacement opening of angular displacement sensor No. 3 are too large, and a total angular displacement feedback fault, a serious fault, that is, a secondary fault, is reported.

[0112] In the embodiment of the present disclosure, the data analysis module 3-3 is further used to:

[0113] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is no deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0114] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is no deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, then the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0115] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, between the guide vane set value in the speed governor control system and the initial guide vane angular displacement opening value, and between the guide vane set value in the speed governor control system and the guide vane servomotor displacement opening value, a secondary fault is determined to have occurred.

[0116] Furthermore, the data analysis module 3-3 is also used for:

[0117] When a secondary fault occurs, the second speed regulator control subsystem 3-5 is switched to be the main one.

[0118] It should be noted that the data analysis module 3-3 performs data analysis and intelligent comparison on the angular displacement guide vane opening output by the optimal logic according to the preset logical relationship and the displacement guide vane opening of the traditional relay. According to the preset logical relationship of the intelligent data analysis system, an intelligent data analysis system is constructed to comprehensively judge the authenticity of the guide vane angular displacement opening, thereby further improving the fault tolerance and reliability of the guide vane feedback signal of the speed regulator system. Wherein, A is the guide vane angular displacement opening value; B is the guide vane opening value of the traditional relay displacement; C is the guide vane set value in the speed governor control system; X1 is the deviation threshold between the guide vane angular displacement opening value and the guide vane relay displacement opening value; X2 is the deviation threshold between the guide vane set value and the guide vane feedback value of the speed governor control system; △F1=|AB|, which represents the difference between the guide vane angular displacement opening value and the guide vane relay displacement opening value; △F2=|CA|, which represents the difference between the guide vane set value of the speed governor control system and the guide vane angular displacement opening value; △F3=|CB|, which represents the difference between the guide vane set value of the speed governor control system and the guide vane servomotor displacement opening value.

[0119] like Figure 5 As shown, if △F1>X1, △F2≤X2 and △F3>X2, it means that there is a deviation between the guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is no deviation between the system guide vane set value and the guide vane angular displacement opening value, and there is a deviation between the system guide vane set value and the guide vane servomotor displacement opening value, then the system reports a general fault, i.e., a first-level fault, and outputs A;

[0120] If △F1>X1,△F2>X2 and △F3≤X2, it means there is a deviation between the guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is a deviation between the system guide vane set value and the guide vane angular displacement opening value, and there is no deviation between the system guide vane set value and the guide vane servomotor displacement opening value, then the system reports a general fault, i.e., a first-level fault, and outputs A;

[0121] If △F1>X1, △F2>X2 and △F3>X2, it means there are deviations between the guide vane angular displacement opening value and the guide vane servomotor displacement opening value, between the system guide vane set value and the guide vane angular displacement opening value, and between the system guide vane set value and the guide vane servomotor displacement opening value. Then a total angular displacement feedback fault and a serious fault, i.e. a secondary fault, will be reported, and the speed governor will cut off the B machine, i.e. the second speed governor control subsystem 3-5 will be used as the main one.

[0122] It should be noted that if Figure 6 As shown, the angular displacement sensor 1 and the data acquisition unit 2 in the guide vane angular displacement opening measurement value determination system of the hydropower station governor belong to the hardware configuration, and the fault diagnosis module 3-1, the optimization logic module 3-2, and the data analysis module 3-3 belong to the software configuration.

[0123] Further, such as Figure 7As shown, the number of the angular displacement sensors 1 can be 6, 1-3 angular displacement sensors 1 are connected to the first speed regulator control subsystem 3-4, i.e., the A machine controller, the first speed regulator control subsystem 3-4 is connected to its corresponding fault diagnosis module 3-1, preferred logic module 3-2, and data analysis module 3-3, 4-6 angular displacement sensors 1 are connected to the second speed regulator control subsystem 3-5, i.e., the B machine controller, the second speed regulator control subsystem 3-5 is connected to its corresponding fault diagnosis module 3-1, preferred logic module 3-2, and data analysis module 3-3, A and B machines are configured with parallel redundancy, and the main and standby machines are switched without interference through serious faults, i.e., secondary faults, so that the fault tolerance and reliability are guaranteed.

[0124] In summary, the guide vane angular displacement opening measurement value determination system of a hydropower station governor proposed in this embodiment has the following advantages: 1. The sensor is used as governor opening feedback during the primary frequency modulation action process, which can eliminate the opening adjustment deviation caused by the mechanical dead zone, making the guide vane adjustment more accurate, so that the primary frequency modulation action amount, i.e., the integral power regulation, can more easily meet the grid requirements; 2. By improving the accuracy of measuring the guide vane opening, the purpose of optimizing the governor performance is achieved, making the governor control more accurate. It also provides more redundant conditions for the guide vane opening feedback, improving the reliability of the governor system operation; 3. The guide vane opening actually measured by the sensor and the relay stroke feedback can fit the corresponding relationship curve. By comparing the corresponding data at the beginning of the main engine factory design, it can be used as the basis for the inspection of the water guide mechanism after the unit overhaul, and problems can be discovered and eliminated in time.

[0125] Embodiment 2

[0126] Figure 8 The flowchart of a method for determining the guide vane angular displacement opening measurement value of a hydropower station governor provided according to one embodiment of the present application is as follows: Figure 8 As shown, the method includes:

[0127] Step 1: Use multiple angular displacement sensors to collect the guide vane angular displacement opening signal of the hydropower unit;

[0128] Step 2: judging whether each angular displacement sensor is faulty and the fault type according to the collected multiple guide vane angular displacement opening signals;

[0129] In the embodiment of the present disclosure, step 2 specifically includes:

[0130] When the positioning parameter collected by the angular displacement sensor when the guide vane is fully closed is greater than or equal to the positioning parameter when the guide vane is fully open, it is determined that the angular displacement sensor has a positioning loss fault, and the fault code is 01;

[0131] When the guide vane angular displacement opening value collected by the angular displacement sensor is less than the preset minimum fault threshold or the guide vane angular displacement opening value is greater than the preset maximum fault threshold, and the first timing time is greater than the disconnection alarm delay threshold, it is determined that the angular displacement sensor has a disconnection fault, and the fault code is 02;

[0132] When the guide vane angular displacement opening value collected by the angular displacement sensor does not change in adjacent cycles, and the second timing time is greater than the dead value alarm delay threshold, it is determined that the angular displacement sensor has a sampling dead value fault, and the fault code is 03;

[0133] When the angular displacement sensor has no positioning loss fault and disconnection fault, within the jump threshold detection time, if the deviation of the per-unit value of the guide vane sampling of the angular displacement sensor between adjacent cycles is greater than the jump threshold amplitude, it is counted once. If the accumulated number of times within the jump threshold detection time is greater than the jump alarm threshold number, it is judged that the angular displacement sensor has a jump fault, and the fault code is 04;

[0134] Wherein, guide vane sampling per unit value = (guide vane angular displacement opening value - minimum positioning parameter) * per unit range / (maximum positioning parameter - minimum positioning parameter);

[0135] When the angular displacement sensor has a non-positioning loss fault or a disconnection fault, the guide vane sampling per unit value of the angular displacement sensor is less than the lower threshold or greater than the upper threshold, and the third timing time is greater than the over-limit alarm delay threshold, it is determined that the angular displacement sensor has an over-limit fault, and the fault code is 05;

[0136] When the angular displacement sensors connected to the first speed governor control subsystem or the second speed governor control subsystem have no positioning loss fault, line break fault, dead value fault, jump fault, or over-limit fault, compare whether there is a deviation in the guide vane angular displacement opening value of each angular displacement sensor. If there is a deviation, and the fourth timing time is greater than the deviation alarm delay threshold, it is determined that the angular displacement sensor corresponding to the deviation has a deviation fault, and the fault code is 06.

[0137] Step 3: Determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type;

[0138] In the embodiment of the present disclosure, step 3 specifically includes:

[0139] When the number of angular displacement sensor failures is greater than or equal to 1 and less than When the guide vane angular displacement opening value corresponding to the first angular displacement sensor is found in the angular displacement sensors that are not faulty according to the preset priority order, and the guide vane angular displacement opening value corresponding to the first angular displacement sensor found is used as the initial guide vane angular displacement opening value;

[0140] When the number of angular displacement sensor failures is equal to When , it is determined that a secondary fault occurs;

[0141] When the number of failures of the angular displacement sensor is equal to 0, compare whether there is a deviation in the guide vane angular displacement opening values ​​of each angular displacement sensor and whether the deviation is greater than a first deviation threshold; if not, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value; if so, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor that has no deviation according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value.

[0142] Step 4: Determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

[0143] In the embodiment of the present disclosure, step 4 specifically includes:

[0144] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is no deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0145] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is no deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, then the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs;

[0146] If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, between the guide vane set value in the speed governor control system and the initial guide vane angular displacement opening value, and between the guide vane set value in the speed governor control system and the guide vane servomotor displacement opening value, a secondary fault is determined to have occurred.

[0147] Furthermore, when a secondary fault occurs, the second speed regulator control subsystem is switched to be the primary control subsystem.

[0148] In summary, the method for determining the guide vane angular displacement opening measurement value of a hydropower station speed governor proposed in this embodiment improves the accuracy of the guide vane opening measurement of the hydropower station speed governor.

[0149] Embodiment 3

[0150] In order to implement the above embodiments, the present disclosure further proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in Embodiment 2 is implemented.

[0151] Embodiment 4

[0152] In order to implement the above embodiment, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the second embodiment is implemented.

[0153] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 application. In this specification, the schematic representations 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, without contradiction.

[0154] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment 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 application includes alternative implementations in which functions may not be performed in 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 technicians in the technical field to which the embodiments of the present application belong.

[0155] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A system for determining the guide vane angular displacement opening measurement value of a hydropower station governor, characterized in that: The guide vane opening measurement system includes: a plurality of angular displacement sensors, a data acquisition unit, and a speed governor control subsystem; wherein the speed governor control subsystem includes: a fault diagnosis module, an optimization logic module, and a data analysis module; The multiple angular displacement sensors are all used to collect the guide vane angular displacement opening signals of the hydropower unit; The data acquisition unit is used to send a plurality of guide vane angular displacement opening signals to the fault diagnosis module; The fault diagnosis module is used to determine whether each angular displacement sensor has a fault and the fault type according to the plurality of guide vane angular displacement opening signals; The preferred logic module is used to determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type; The data analysis module is used to determine the guide vane opening measurement value and fault level of the hydropower station governor based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

2. The guide vane opening measurement value determination system according to claim 1, characterized in that: The multiple angular displacement sensors are installed on the guide vane shaft elbow end cover bolts.

3. The guide vane opening measurement value determination system according to claim 1, characterized in that: The speed regulator control subsystem comprises: a first speed regulator control subsystem and a second speed regulator control subsystem; The first speed regulator control subsystem and the second speed regulator control subsystem both include: a fault diagnosis module, an optimization logic module and a data analysis module; The first speed regulator control subsystem and the second speed regulator control subsystem adopt parallel redundant control, and when a secondary fault occurs, the first speed regulator control subsystem and the second speed regulator control subsystem are switched without interruption. Wherein, there are N angular displacement sensors, An angular displacement sensor is connected to the first speed regulator control subsystem, and the remaining An angular displacement sensor is connected to the second speed regulator control subsystem.

4. The guide vane opening measurement value determination system according to claim 3, characterized in that: The fault diagnosis module is also used for: When the positioning parameter collected by the angular displacement sensor when the guide vane is fully closed is greater than or equal to the positioning parameter when the guide vane is fully open, it is determined that the angular displacement sensor has a positioning loss fault, and the fault code is 01; When the guide vane angular displacement opening value collected by the angular displacement sensor is less than the preset minimum fault threshold or the guide vane angular displacement opening value is greater than the preset maximum fault threshold, and the first timing time is greater than the disconnection alarm delay threshold, it is determined that the angular displacement sensor has a disconnection fault, and the fault code is 02; When the guide vane angular displacement opening value collected by the angular displacement sensor does not change in adjacent cycles, and the second timing time is greater than the dead value alarm delay threshold, it is determined that the angular displacement sensor has a sampling dead value fault, and the fault code is 03; When the angular displacement sensor has no positioning loss fault and disconnection fault, within the jump threshold detection time, if the deviation of the per-unit value of the guide vane sampling of the angular displacement sensor between adjacent cycles is greater than the jump threshold amplitude, it is counted once. If the accumulated number of times within the jump threshold detection time is greater than the jump alarm threshold number, it is judged that the angular displacement sensor has a jump fault, and the fault code is 04; Wherein, guide vane sampling per unit value = (guide vane angular displacement opening value - minimum positioning parameter) * per unit range / (maximum positioning parameter - minimum positioning parameter); When the angular displacement sensor has no positioning loss fault and disconnection fault, the guide vane sampling per unit value of the angular displacement sensor is less than the lower threshold or greater than the upper threshold, and the third timing time is greater than the over-limit alarm delay threshold, it is determined that the angular displacement sensor has an over-limit fault, and the fault code is 05; When the angular displacement sensors connected to the first speed governor control subsystem or the second speed governor control subsystem have no positioning loss fault, line break fault, dead value fault, jump fault, or over-limit fault, compare whether there is a deviation in the guide vane angular displacement opening value of each angular displacement sensor. If there is a deviation, and the fourth timing time is greater than the deviation alarm delay threshold, it is determined that the angular displacement sensor corresponding to the deviation has a deviation fault, and the fault code is 06.

5. The guide vane opening measurement value determination system according to claim 4, characterized in that: The preferred logic module is also used for: When the number of angular displacement sensor failures is greater than or equal to 1 and less than When the guide vane angular displacement opening value corresponding to the first angular displacement sensor is found in the angular displacement sensors that are not faulty according to the preset priority order, and the guide vane angular displacement opening value corresponding to the first angular displacement sensor found is used as the initial guide vane angular displacement opening value; When the number of angular displacement sensor failures is equal to When , it is determined that a secondary fault occurs; When the number of failures of the angular displacement sensor is equal to 0, compare whether there is a deviation in the guide vane angular displacement opening values ​​of each angular displacement sensor and whether the deviation is greater than a first deviation threshold; if not, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value; if so, find out the guide vane angular displacement opening value corresponding to the first angular displacement sensor in each angular displacement sensor that has no deviation according to a preset priority order, and use the guide vane angular displacement opening value corresponding to the first angular displacement sensor found out as the initial guide vane angular displacement opening value.

6. The guide vane opening measurement value determination system according to claim 5, characterized in that: The data analysis module is also used for: If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, there is no deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs; If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, and there is a deviation between the guide vane set value in the governor control system and the initial guide vane angular displacement opening value, and there is no deviation between the guide vane set value in the governor control system and the guide vane servomotor displacement opening value, then the initial guide vane angular displacement opening value is used as the guide vane opening measurement value of the hydropower station governor, and it is determined that a primary fault occurs; If there is a deviation between the initial guide vane angular displacement opening value and the guide vane servomotor displacement opening value, between the guide vane set value in the speed governor control system and the initial guide vane angular displacement opening value, and between the guide vane set value in the speed governor control system and the guide vane servomotor displacement opening value, a secondary fault is determined to have occurred.

7. The guide vane opening measurement value determination system according to claim 6, characterized in that: The data analysis module is also used for: When a secondary fault occurs, the second speed regulator control subsystem is switched to primary use.

8. A method for determining the guide vane angular displacement opening measurement value of a hydropower station speed governor based on the guide vane angular displacement opening measurement value determination system of a hydropower station speed governor according to any one of claims 1 to 7, characterized in that: The method comprises: Multiple angular displacement sensors are used to collect the guide vane angular displacement opening signals of the hydropower unit; Determining whether each angular displacement sensor is faulty and the fault type according to the collected multiple guide vane angular displacement opening signals; Determine the initial guide vane angular displacement opening value or fault level of the hydropower unit according to whether each angular displacement sensor is faulty and the fault type; The guide vane opening measurement value and the fault level of the hydropower station governor are determined based on the initial guide vane angular displacement opening value, the guide vane servomotor displacement opening value and the guide vane opening given value in the governor control subsystem.

9. 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 when the processor executes the program, the method according to claim 8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to claim 8 is implemented.

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