Hydraulic turbine governor guide vane displacement signal processing method and electronic device

Abstract

This invention discloses a method and electronic device for processing guide vane displacement signals of a hydro turbine governor, relating to the field of hydro-generator technology. The method includes: acquiring signals collected by primary and backup guide vane displacement sensors in the governor system; calculating pairwise differences between signals from each primary sensor based on the signals from the primary sensor participating in a 3-to-2 selection algorithm; comparing each pairwise difference with a preset deviation value to obtain a comparison result; if the comparison result indicates the presence of a target faulty sensor, removing the signal from the 3-to-2 selection algorithm; and introducing a backup signal into the 3-to-2 selection algorithm to replace the signal from the target faulty sensor and recalculating the difference. This invention, by introducing a fourth backup signal for dynamic compensation, ensures the continuous operation of the 3-to-2 selection logic when a single sensor fails, thereby improving system fault tolerance and avoiding huge power generation losses caused by unplanned unit shutdowns.

Description

Technical Field

[0001] This invention relates to the field of hydro-generator technology, and more specifically, to a method and electronic device for processing the displacement signal of the guide vane of a hydro-turbine governor. Background Technology

[0002] In the operation and control systems of modern hydropower stations, the turbine governor, as one of the most crucial control devices of the turbine-generator unit, plays a vital role. The governor's main function is to precisely control the opening of the guide vane servo, thereby regulating the flow of water entering the turbine and ultimately achieving stable control of the turbine speed and flexible adjustment of the system power. In this process, the guide vane displacement sensor plays a key role in measuring the opening of the guide vane servo, accurately reflecting the mechanical travel of the servo. The displacement signal collected and generated by the guide vane displacement sensor is the fundamental and core control variable that fully participates in the governor's PID regulation calculations and closed-loop control. Therefore, the accuracy and transmission reliability of the guide vane displacement signal directly determine whether the governor system can maintain stable operation. To ensure the absolute reliability of the measurement signals, the mainstream medium and large-sized hydropower unit governor systems in the industry are usually equipped with three independent guide vane displacement sensors. The real-time signals collected by the three guide vane displacement sensors are synchronously sent to the central controller of the governor and processed at the software level using a conventional three-to-two logic algorithm. This algorithm compares the measurement signals of the three sensors in real time pairwise, forming a voting mechanism to continuously monitor and output guide vane displacement control data that reflects the actual operating status of the unit.

[0003] Currently, while the conventional 3-to-2 selection algorithm provides initial safety, it is unable to self-heal when faced with sudden single-point sensor failures, and is highly susceptible to serious derivative risks. Specifically, if any one of the guide vane displacement sensors malfunctions or misjudges and is identified and removed by the system, the original 3-to-2 selection algorithm cannot continue, causing the voting mechanism, upon which the system relies for reliability, to completely fail. The remaining two sensors then face a logic blind spot; if one of them experiences data drift again, it will directly lead to abnormal governor regulation or even unplanned unit shutdowns. To ensure unit safety and the personal safety of troubleshooting personnel, existing methods often force shutdowns. However, this passive approach significantly disrupts the grid's dispatch schedule, especially during the critical flood season when medium and large hydropower units have virtually no opportunity for maintenance shutdowns. Furthermore, the hardware vulnerability exacerbates the deadlock between the urgent need for sensor repair and the absolute necessity of unit shutdown, inevitably leading to increased unplanned maintenance frequency and substantial economic losses in power generation. Summary of the Invention

[0004] The purpose of this invention is to provide a method and electronic device for processing the displacement signal of the guide vane of a turbine governor. It not only ensures the continuous operation of the three-to-two logic when a single sensor fails by introducing a fourth backup signal for dynamic compensation, thereby improving the system's fault tolerance, but also allows for delayed maintenance of faulty equipment, thus completely avoiding the huge power generation losses caused by unplanned unit shutdowns.

[0005] This invention is achieved through the following technical solution: A method for processing the displacement signal of the guide vane of a water turbine governor, characterized in that the method includes the following steps: The signals collected by the four guide vane displacement sensors in the speed governor system are acquired. Among them, three of the guide vane displacement sensors are used as the main sensors to participate in the three-to-two logic algorithm, and the remaining one guide vane displacement sensor is used as the backup sensor to provide backup signals. Based on the signals of the primary sensors participating in the three-to-two logic algorithm, calculate the pairwise differences between the signals of each primary sensor; The pairwise differences are compared with preset deviation values ​​to obtain comparison results; If the comparison result indicates the presence of a target fault sensor, then the signal of the target fault sensor is removed from the three-to-two logic algorithm; The backup signal is introduced into the three-to-two logic algorithm to replace the signal of the target fault sensor and recalculate the difference, and output the target displacement signal for governor regulation and control, so as to realize the safe and continuous operation of the hydro-generator unit without shutting down.

[0006] Optionally, comparing the pairwise differences with preset deviation values ​​further includes: If the pairwise differences are all less than the preset deviation value, then it is determined that the three main sensors participating in the three-to-two logic algorithm are all in normal condition. Select the signal from any one of the main sensors under normal conditions as the main signal for participating in the speed controller's regulation and control.

[0007] Optionally, the three primary sensors include a first sensor, a second sensor, and a third sensor. Based on the signals from the primary sensors participating in the three-to-two logic algorithm, the pairwise differences between the signals of each primary sensor are calculated, including: Calculate the first difference between the signal from the first sensor and the signal from the second sensor; Calculate the second difference between the signal from the first sensor and the signal from the third sensor; Calculate the third difference between the signal from the second sensor and the signal from the third sensor.

[0008] Optionally, if the comparison result indicates the presence of a target fault sensor, including: If the first difference is greater than the preset deviation value and the second difference is greater than the preset deviation value, then the first sensor is determined to be the target fault sensor.

[0009] Optionally, if the comparison result indicates the presence of a target fault sensor, the method further includes: If the first difference is greater than the preset deviation value and the third difference is greater than the preset deviation value, then the second sensor is determined to be the target fault sensor.

[0010] Optionally, if the comparison result indicates the presence of a target fault sensor, the method further includes: If the second difference is greater than the preset deviation value and the third difference is greater than the preset deviation value, then the third sensor is determined to be the target fault sensor.

[0011] Optionally, removing the signal from the target fault sensor from the three-to-two logic algorithm further includes: The quality of the primary sensor participating in the three-to-two logic algorithm is assessed. If the signal from the primary sensor exhibits any one or more of the following characteristics: open circuit, dead value, jump, or exceeding limit, then the corresponding primary sensor is determined to be the target faulty sensor.

[0012] Optionally, acquire signals collected by four guide vane displacement sensors in the governor system, including: The signals collected by the four guide vane displacement sensors are obtained by an analog one-to-two isolator. The four acquired signals are respectively sent to the main controller and the backup controller of the speed controller system.

[0013] Optionally, the method of introducing the backup signal into the three-to-two logic algorithm to replace the signal of the target fault sensor and recalculate the difference further includes: Each pairwise difference obtained from the recalculation is compared twice with the preset deviation value; If the result of the second comparison indicates that the pairwise differences between the three replaced sensors are all less than the preset deviation value, then the three replaced sensors will be used as the new set of primary sensors, and the three-to-two logic algorithm will continue to be executed.

[0014] An electronic device, comprising: Memory, used to store computer programs; A processor is used to execute the computer program to implement the steps of a method for processing the displacement signal of the guide vane of a water turbine governor.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: On the one hand, this invention fundamentally breaks through the fragile technical bottleneck of traditional technology, where single-point failures can easily induce system degradation or even lead to a complete shutdown, ensuring the continuous and stable operation of hydro-generator units even when core sensors are faulty. On the other hand, this invention perfectly resolves the severe contradiction of medium and large-sized hydro-generator units encountering sensor damage during the flood season's high power generation but lacking the conditions for shutdown and troubleshooting, allowing faulty sensors to be postponed until after the flood season or during regular maintenance, completely avoiding the huge power generation losses caused by forced shutdowns for maintenance. Attached Figure Description

[0016] Figure 1 A flowchart illustrating the method for processing the guide vane displacement signal of a water turbine governor provided by the present invention; Figure 2 A schematic diagram of the electronic device provided by the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Example 1 This embodiment provides a method for processing the displacement signal of the guide vane of a hydro turbine governor. This method can be applied to the automatic control system of a hydro turbine generator set, especially integrated into the programmable logic controller or dedicated controller of the hydro turbine governor.

[0019] like Figure 1 As shown in this embodiment, the method for processing the guide vane displacement signal of a turbine governor specifically includes the following steps: Step 1: Obtain the displacement signals collected by the four guide vane displacement sensors in the speed governor system. Among them, three of the guide vane displacement sensors are used as primary sensors to participate in the three-to-two logic algorithm, and the remaining guide vane displacement sensor is used as a backup sensor to provide backup signals.

[0020] Specifically, in the governor control system of modern medium and large-sized hydro-generator units, redundant sensor systems are typically configured to ensure the absolute reliability and safety of core control variables. In the hardware architecture of this embodiment, the governor system is equipped with a total of four physically independent guide vane displacement sensors, which are labeled as sensor 1, sensor 2, sensor 3, and sensor 4 in this embodiment. These four sensors are installed at appropriate locations on the turbine guide vane servo unit to measure the mechanical travel of the servo unit in real time and synchronously, and convert this travel into standardized electrical signals, typically a 4-20mA DC current signal or a 0-10V DC voltage signal. These signals directly characterize the actual opening percentage of the guide vanes.

[0021] At the software logic level, these four sensors are assigned different initial roles. During the initialization phase or normal operation, the controller program designates the first, second, and third sensors as the primary sensor set. The displacement signals of these three primary sensors directly participate in the core three-to-two voting logic algorithm. The fourth sensor, on the other hand, is designated as a backup sensor. Its collected displacement signal, i.e., the backup signal, does not participate in the real-time calculation of the three-to-two logic algorithm in the initial state. Instead, it serves as a hot standby redundancy, providing immediate data source support for sensor failure switching.

[0022] Step 2: Based on the displacement signals of the primary sensors participating in the three-to-two logic algorithm, calculate the pairwise differences between the displacement signals of each primary sensor.

[0023] Specifically, once the controller receives real-time displacement signals from the first, second, and third primary sensors, the core operation of the three-to-two selection algorithm begins. The purpose of this step is to determine the consistency of the three primary signals through quantization comparison. The processing unit within the controller performs pairwise subtraction to obtain the absolute deviation between them.

[0024] Let the signal value of the first sensor be YA, the signal value of the second sensor be YB, and the signal value of the third sensor be YC. The processing unit will calculate the three differences: The first difference, Yab, is the absolute difference between the first sensor signal YA and the second sensor signal YB, i.e., |YA - YB|. The second difference, Yac, is the absolute difference between the first sensor signal YA and the third sensor signal YC, i.e., |YA - YC|. The third difference, Ybc, is the absolute difference between the second sensor signal YB and the third sensor signal YC, i.e., |YB - YC|.

[0025] Yab, Yac, and Ybc are the direct mathematical basis for determining whether the sensor is operating normally and whether there is measurement inaccuracy or drift. This calculation is repeated in each controller scan cycle, thereby achieving high-frequency dynamic monitoring of sensor signal consistency.

[0026] Step 3: Compare the pairwise differences with the preset deviation values ​​to obtain the comparison results.

[0027] Specifically, after calculating three pairwise differences, the controller compares each of these differences with a preset deviation value set within the system. The magnitude of the preset deviation value is determined based on the inherent accuracy level of the sensor, the stability requirements of the measurement and control system, and empirical data from the field conditions.

[0028] More specifically, the comparison process is a logical judgment process. The controller checks one by one whether Yab, Yac, and Ybc are greater than the preset deviation value. The comparison result directly maps the current consistency status of the three main sensors. If a certain difference is greater than the preset deviation value, it indicates that there is a non-negligible deviation between the two sensor signals corresponding to that difference, and there is a possibility that at least one sensor has failed.

[0029] Step 4: If the comparison result indicates the presence of a target fault sensor, then the displacement signal of the target fault sensor is removed from the three-to-two logic algorithm.

[0030] Specifically, based on the comparison results generated in the previous step, the controller executes a set of preset fault diagnosis logic to accurately locate the target faulty sensor. This diagnostic logic is based on the following criterion: if a sensor deviates significantly from two other sensors simultaneously, then the probability that the sensor itself is the source of the fault is extremely high.

[0031] The diagnostic logic is specifically manifested as follows: If the first difference Yab is greater than the preset deviation value, and the second difference Yac is also greater than the preset deviation value, the system determines that the first sensor is the target faulty sensor. This is because the signal of the first sensor deviates from the signals of the second and third sensors simultaneously, and the consistency between the signals of the second and third sensors is guaranteed by the third difference Ybc (which should be less than the preset deviation value at this time).

[0032] Similarly, if the first difference Yab is greater than the preset deviation value, and the third difference Ybc is also greater than the preset deviation value, then the system determines that the second sensor is the target fault sensor.

[0033] If the second difference Yac is greater than the preset deviation value, and the third difference Ybc is also greater than the preset deviation value, then the system determines that the third sensor is the target fault sensor.

[0034] Once the target faulty sensor is accurately identified, the controller immediately performs a removal operation at the software level. Removal here means shielding or isolating the signal from the target faulty sensor in the current and subsequent operation cycles, preventing it from participating in any control calculations as valid data. Simultaneously, the system generates a corresponding fault flag. This flag serves two purposes: firstly, it triggers the subsequent backup signal introduction process; secondly, it can be recorded as alarm information in the event log for maintenance personnel to review.

[0035] Step 5: Introduce the backup signal into the three-to-two logic algorithm to replace the displacement signal of the target fault sensor and recalculate the difference. This ensures that the three-to-two logic algorithm continues to operate even in the presence of a single-point sensor fault, and outputs the target displacement signal for governor regulation and control, thereby enabling the safe and continuous operation of the hydro-generator unit without shutting down.

[0036] Specifically, after the target faulty sensor is removed, in order to prevent the 3-to-2 multiplexer logic from degrading or failing due to a lack of valid input, the system will automatically perform a replacement operation. The controller will activate the displacement signal of the fourth sensor, which has been in standby mode, i.e., the backup signal, and introduce it into the input of the 3-to-2 multiplexer algorithm.

[0037] Assuming the first sensor is removed, the effective sensor set within the system dynamically switches from {first sensor, second sensor, third sensor} to {second sensor, third sensor, fourth sensor}. The controller then uses this new set of primary sensors to return to step 2 and recalculate the new pairwise differences, specifically the differences between the signals of the second and third, second and fourth, and third and fourth sensors.

[0038] Through seamless dynamic compensation, the integrity of the core three-to-two voting mechanism is maintained even after a single-point sensor failure. Three healthy signal sources are always involved in the calculation, ensuring that the controller can always obtain the most reliable target displacement signal through comparison and stably output it to the governor's PID control module. Because the control system always receives highly reliable feedback signals, the speed and power regulation of the hydro-generator unit are smoothly carried out. This solves the problem of system regulation anomalies or unplanned shutdowns that could be caused by single-point sensor failures. Especially during critical periods such as the flood season when large-scale power generation is not feasible for shutdown and maintenance, this greatly ensures the safe and continuous operation of the unit and mitigates potential economic losses in power generation.

[0039] Example 2 Based on Example 1, this embodiment further limits and optimizes the processing method of the guide vane displacement signal of the turbine governor.

[0040] In some optional embodiments, the comparison results of step 3 are refined. Following step 3, this embodiment further includes determining the normal operating status of the sensors. If the controller determines that each pairwise difference, i.e., Yab, Yac, and Ybc, is less than the preset deviation value, the controller will determine that all three primary sensors currently participating in the three-to-two selection algorithm are in normal operating condition. Under this ideal condition, the signals from the three sensors are highly consistent and are all considered valid. At this point, the controller will select the displacement signal of any one of the primary sensors, or calculate the average of these three signals, as the final target displacement signal used for speed controller adjustment and control, and output it to the PID control loop.

[0041] In some optional embodiments, to further improve the robustness of fault diagnosis, the method further includes a quality assessment step before performing the difference comparison diagnosis in step 4. The controller performs real-time quality monitoring on the raw signals of each primary sensor participating in the 3-to-2 logic algorithm. This quality assessment is primarily used to detect hard faults that are not measurement drift. Specific monitored features include: Disconnection characteristics: Determine whether the sensor signal is below the lower limit of its effective range. A typical example is a 4-20mA current sensor. If the signal value is below 3.5mA for a long time, it can be determined that the signal is disconnected.

[0042] Dead value characteristics: Under normal circumstances, the sensor signal detected by the controller will have a certain slight fluctuation. If the detection signal remains constant for a long time, it indicates that there are problems such as internal circuit failure or logic configuration error in the sensor.

[0043] Jump characteristics: Determine whether the sensor signal undergoes a step change that is far beyond physical possibility within an extremely short period of time.

[0044] Exceeding limits characteristic: Determine whether the sensor signal exceeds the upper limit of its physical or electrical range. A typical example is a 4-20mA sensor whose signal value is higher than 21mA for an extended period of time.

[0045] If the displacement signal of any primary sensor is detected to have any one or more of the above-mentioned characteristics such as disconnection, dead value, jump or over-limit, the controller will bypass the difference comparison logic, directly determine the sensor as the target faulty sensor, and immediately trigger the elimination and replacement process.

[0046] In some optional embodiments, after introducing the backup signal into the 3-to-2 logic algorithm to replace the displacement signal of the target faulty sensor and recalculating the difference, the method also includes a verification step. The controller recalculates the pairwise differences of the new set (a set consisting of the original two healthy sensors and one backup sensor) and compares them a second time with the preset deviation value. If the result of this second comparison shows that the pairwise differences corresponding to the three replaced sensors are all less than the preset deviation value, it indicates that the backup sensor is working normally and is well compatible with the original healthy sensors. At this time, the controller confirms this new sensor set as the current primary sensor set and continues to execute the 3-to-2 logic algorithm based on this new set during the control cycle until a new fault occurs or the system is reset.

[0047] In some alternative examples of energy application, such as Figure 1 As shown, to achieve the highest level of system reliability, the speed controller system in this embodiment adopts a dual-redundant controller architecture, namely, a first set of controllers (primary PLC) and a second set of controllers (backup PLC). The specific implementation of obtaining the displacement signals collected by the four guide vane displacement sensors in step 1 is as follows: the output signal of each guide vane displacement sensor is connected to a configured analog-to-digital isolator. This isolator can accurately convert one input analog signal into two electrically isolated output signals. The two isolated signals are transmitted to the analog input modules of the first and second sets of controllers, respectively. Based on the above, the two sets of controllers can obtain four sensor signals that are completely synchronous but electrically independent, and synchronously and independently execute all the processing methods described in this invention. One set serves as the main control output, and the other serves as a hot standby, enabling seamless switching when the main control fails.

[0048] In some optional embodiments, the specific implementation of removing the displacement signal of the target faulty sensor from the 3-to-2 logic algorithm is as follows: After the controller determines the target faulty sensor through diagnostic logic, it sets a specific status word or Boolean variable associated with the sensor's input channel, i.e., a fault flag, to a fault state in its internal storage area. At the beginning of each operation cycle of the 3-to-2 logic algorithm, the program checks the fault flags of the four sensors. Based on this flag set to a fault state, the algorithm program will actively shield or skip the reading and use of the displacement signal of the target faulty sensor in the current and all subsequent operation cycles, even if the sensor's physical signal is still connected to the input module. The shielding mechanism based on software flags makes fault isolation accurate and efficient, and it allows the faulty physical sensor to remain in a maintenance-ready state without shutting down the unit until the next planned shutdown maintenance window. Then, maintenance personnel can replace or repair the sensor based on the fault flag information recorded in the controller, thereby maximizing maintenance convenience and unit operating efficiency.

[0049] Example 3 like Figure 2 As shown in the figure, this embodiment of the invention also provides an electronic device, which can be a programmable logic controller (PLC), a dedicated controller, or an embedded system for a water turbine governor. The electronic device includes, in its hardware structure, a processor, a memory, and input / output interfaces for connecting to external sensors and actuators.

[0050] The memory is used to store computer programs. The memory can be any form of non-transitory computer-readable storage medium, such as read-only memory, random access memory, magnetic disk, or optical disk. Instruction code for implementing the method of the present invention is embedded or loaded in the memory.

[0051] When the processor executes a computer program stored in the memory, it implements all or part of the steps of the method for processing the guide vane displacement signal of the turbine governor described in any of the foregoing embodiments. By executing instructions, the processor can control the input / output interface to acquire displacement signals from the four guide vane displacement sensors, internally perform difference calculations, logical comparisons, fault diagnosis, signal elimination and backup, and finally output a stable and reliable target displacement signal to the control actuator.

[0052] Example 4 This invention also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it can implement all or part of the steps of the method for processing the displacement signal of the turbine governor guide vane described in any of the foregoing embodiments. The computer-readable storage medium can be any electronic, magnetic, optical, or other physical device capable of storing program code, such as a USB flash drive, portable hard drive, optical disc, or read-only memory embedded in a chip.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of processing guide vane displacement signals of a hydro-turbine governor, characterized by, The steps of this method include: The signals collected by the four guide vane displacement sensors in the speed governor system are acquired. Among them, three of the guide vane displacement sensors are used as the main sensors to participate in the three-to-two logic algorithm, and the remaining one guide vane displacement sensor is used as the backup sensor to provide backup signals. Based on the signals of the primary sensors participating in the three-to-two logic algorithm, calculate the pairwise differences between the signals of each primary sensor; The pairwise differences are compared with preset deviation values ​​to obtain comparison results; If the comparison result indicates the presence of a target fault sensor, then the signal of the target fault sensor is removed from the three-to-two logic algorithm; The backup signal is introduced into the three-to-two logic algorithm to replace the signal of the target fault sensor and recalculate the difference, and output the target displacement signal for governor regulation and control, so as to realize the safe and continuous operation of the hydro-generator unit without shutting down.

2. The method of processing guide vane displacement signals of a hydro-turbine governor according to claim 1, characterized in that, The comparison of each pairwise difference with a preset deviation value further includes: If the pairwise differences are all less than the preset deviation value, then it is determined that the three main sensors participating in the three-to-two logic algorithm are all in normal condition. Select the signal from any one of the main sensors under normal conditions as the main signal for participating in the speed controller's regulation and control.

3. The method of claim 1, wherein the step of determining the displacement of the guide vane is performed by using a method of calculating the displacement of the guide vane based on the displacement of the guide vane at the time of the last calibration and the displacement of the guide vane at the time of the current calibration. The three primary sensors include a first sensor, a second sensor, and a third sensor. Based on the signals from the primary sensors participating in the three-to-two logic algorithm, the pairwise differences between the signals of each primary sensor are calculated, including: Calculate the first difference between the signal from the first sensor and the signal from the second sensor; Calculate the second difference between the signal from the first sensor and the signal from the third sensor; Calculate the third difference between the signal from the second sensor and the signal from the third sensor.

4. The method of claim 3, wherein the step of determining the displacement of the guide vane is performed by the steps of: determining a first displacement of the guide vane; determining a second displacement of the guide vane; and determining the displacement of the guide vane based on the first displacement and the second displacement. If the comparison result indicates the presence of a target fault sensor, including: If the first difference is greater than the preset deviation value and the second difference is greater than the preset deviation value, then the first sensor is determined to be the target fault sensor.

5. The method for processing the guide vane displacement signal of a turbine governor according to claim 4, characterized in that, If the comparison result indicates the presence of a target fault sensor, the method further includes: If the first difference is greater than the preset deviation value and the third difference is greater than the preset deviation value, then the second sensor is determined to be the target fault sensor.

6. The method for processing the guide vane displacement signal of a turbine governor according to claim 5, characterized in that, If the comparison result indicates the presence of a target fault sensor, the method further includes: If the second difference is greater than the preset deviation value and the third difference is greater than the preset deviation value, then the third sensor is determined to be the target fault sensor.

7. The method for processing the guide vane displacement signal of a turbine governor according to claim 1, characterized in that, Removing the signal from the target fault sensor from the three-to-two logic algorithm further includes: The quality of the primary sensor participating in the three-to-two logic algorithm is assessed. If the signal from the primary sensor exhibits any one or more of the following characteristics: open circuit, dead value, jump, or exceeding limit, then the corresponding primary sensor is determined to be the target faulty sensor.

8. The method for processing the guide vane displacement signal of a turbine governor according to claim 1, characterized in that, Acquire signals from the four guide vane displacement sensors in the governor system, including: The signals collected by the four guide vane displacement sensors are obtained by an analog one-to-two isolator. The four acquired signals are respectively sent to the main controller and the backup controller of the speed controller system.

9. The method for processing the guide vane displacement signal of a turbine governor according to claim 1, characterized in that, Introducing the backup signal into the three-to-two logic algorithm to replace the signal of the target fault sensor and recalculate the difference further includes: Each pairwise difference obtained from the recalculation is compared twice with the preset deviation value; If the result of the second comparison indicates that the pairwise differences between the three replaced sensors are all less than the preset deviation value, then the three replaced sensors will be used as the new set of primary sensors, and the three-to-two logic algorithm will continue to be executed.

10. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the method for processing the guide vane displacement signal of a turbine governor as described in any one of claims 1 to 9.

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