Water turbine governor control and frequency measurement method, device and system

Abstract

The invention relates to a water turbine governor control and frequency measurement method, device and system. The method comprises the steps of determining a main module, a first standby module and a second standby module for frequency measurement based on the unit frequency of a water turbine under the condition that the operation state of the speed regulator is a startup process state; when the operation state is a no-load state or a power generation state, fault modules and non-fault modules in the first fluted disc frequency measurement module, the second fluted disc frequency measurement module and the PT module are determined; determining a main module and a first standby module according to a frequency measurement deviation value between non-fault modules under the condition that the fault module exists; determining a main module, a first standby module and a second standby module according to a frequency measurement deviation value between non-fault modules under the condition that the fault module does not exist; and controlling the main module to measure the unit frequency of the water turbine. The scheme improves the accuracy of measuring the frequency of the water turbine set by the speed regulator.

Description

Technical Field

[0001] This disclosure relates to the field of governor technology, and in particular to a method, device and system for controlling and measuring the frequency of a hydro turbine governor. Background Technology

[0002] In related technologies, the turbine governor, as the core control equipment of a hydropower station, is responsible for regulating the frequency and power of the generating unit to ensure the stable operation of the power grid. Governor frequency measurement and control technology directly affects the dynamic response, regulation accuracy, and reliability of the governor system, and is one of the core technologies of the governor system.

[0003] Currently, the speed governors of large and medium-sized hydropower stations mainly use one gear disc and one voltage transformer (PT) for unit frequency measurement. During unit startup, gear disc frequency measurement is usually the primary method, with PT frequency measurement as a backup. When the unit enters no-load and generating states, PT frequency measurement becomes the primary method, with gear disc frequency measurement as a backup. The fault judgment logic for both gear disc and PT frequency measurement is basically based on the relationship between the collected voltage amplitude and the preset frequency range value to determine whether there is an abnormality. This method has a simple main / backup switching logic and poor accuracy. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a method, device and system for controlling and measuring the frequency of a water turbine governor.

[0005] According to a first aspect of the present disclosure, a method for controlling and measuring the frequency of a water turbine governor is provided, comprising:

[0006] The operating status of the speed governor is determined; the operating status includes the start-up process status, no-load status, and power generation status; the frequency measurement module of the speed governor includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a voltage transformer (PT) module.

[0007] When the operating state is the start-up process state, the main module, the first backup module and the second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module based on the turbine unit frequency;

[0008] When the operating state is either no-load or power generation, determine the faulty and non-faulty modules in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module.

[0009] In the presence of a faulty module, the primary module and the first backup module are determined based on the frequency measurement deviation between the non-faulty modules.

[0010] In the absence of faulty modules, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation values ​​between the non-faulty modules.

[0011] The main module is controlled to measure the unit frequency of the water turbine.

[0012] In some embodiments of this disclosure, when the operating state is the start-up process state, determining the primary module, the first backup module, and the second backup module from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module based on the turbine's unit frequency includes:

[0013] When the operating state is the power-on process state, the first toothed disc frequency measurement module is determined as the initial primary module, the second toothed disc frequency measurement module is determined as the initial first backup module, and the PT frequency measurement module is determined as the initial second backup module. The unit frequency is obtained using the initial primary module.

[0014] When the unit frequency is less than the first preset frequency, the initial main module is determined as the main module, the second toothed disc frequency measurement module is determined as the first backup module, and the PT frequency measurement module is determined as the second backup module.

[0015] When the unit frequency is greater than or equal to the first preset frequency, the PT frequency measurement module is determined to be the main module, the first toothed disc frequency measurement module is determined to be the first backup module, and the second toothed disc frequency measurement module is determined to be the second backup module.

[0016] In some embodiments of this disclosure, the method further includes:

[0017] If the operating state is the power-on process state and the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer PT module are all faulty modules, the speed controller will control the speed controller to stop.

[0018] In some embodiments of this disclosure, determining the primary module and the first backup module based on the frequency measurement deviation value between the non-faulty modules in the presence of a faulty module includes:

[0019] If the PT module is a faulty module and the first and second gear plate frequency measurement modules are non-faulty modules, the first gear plate frequency measurement module is determined to be the primary module and the second gear plate frequency measurement module is determined to be the first backup module.

[0020] If the PT module and the first toothed disc frequency measurement module are faulty modules, and the second toothed disc frequency measurement module is a non-faulty module, then the second toothed disc frequency measurement module is determined to be the main module.

[0021] If the first toothed disc frequency measurement module is a faulty module, and the second toothed disc frequency measurement module and the PT module are non-faulty modules, and the frequency measurement deviation between the second toothed disc frequency measurement module and the PT module is greater than the first deviation value, then the second toothed disc frequency measurement module is determined to be the main module.

[0022] If the second gear plate frequency measurement module is a faulty module, and the first gear plate frequency measurement module and the PT module are non-faulty modules, and the frequency measurement deviation between the first gear plate frequency measurement module and the PT module is greater than the first deviation value, then the first gear plate frequency measurement module is determined to be the main module.

[0023] If the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer (PT) module are all faulty, the speed controller will switch from automatic operation mode to manual operation mode.

[0024] In some embodiments of this disclosure, determining the primary module, the first backup module, and the second backup module based on the frequency measurement deviation value between the non-faulty modules includes:

[0025] If the frequency measurement deviation between the PT module and the first toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is less than the second deviation value, then the first toothed disc frequency measurement module is determined to be the main module, and the deviation alarm information of the PT module is output.

[0026] If the frequency measurement deviation between the first toothed disc frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the first toothed disc frequency measurement module is output.

[0027] If the frequency measurement deviation between the second gear plate frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the second gear plate frequency measurement module and the first gear plate frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the first gear plate frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the second gear plate frequency measurement module is output.

[0028] According to a second aspect of the present disclosure, a turbine governor control and frequency measurement device is provided, comprising a frequency measurement module, a frequency signal processing module, and a controller module. The frequency measurement module of the governor includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a PT module, wherein:

[0029] The input terminals of the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the PT module are respectively connected to the turbine unit;

[0030] The first toothed disc frequency measurement module is connected to the first frequency signal processing module, and the second toothed disc frequency measurement module is connected to the second frequency signal processing module.

[0031] The PT module is connected to the main PCC controller through a third frequency signal processing module;

[0032] The PT module is connected to the backup PCC controller via the fourth frequency signal processing module;

[0033] The first frequency signal processing module, the second frequency signal processing module, the third frequency signal processing module, and the fourth frequency signal processing module are all connected to the primary PCC controller, and the first frequency signal processing module, the second frequency signal processing module, the third frequency signal processing module, and the fourth frequency signal processing module are all connected to the backup PCC controller.

[0034] According to a third aspect of the present disclosure, a turbine governor control and frequency measurement device includes:

[0035] The first determining unit is used to determine the operating status of the speed governor; the operating status includes the start-up process status, no-load status, and power generation status; the frequency measurement module includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a voltage transformer (PT) module.

[0036] The second determining unit is used to determine the main module, the first backup module, and the second backup module from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module based on the turbine's unit frequency when the operating state is the start-up process state.

[0037] The third determining unit is used to determine the faulty module and the non-faulty module in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module when the operating state is an unloaded state or a power generation state.

[0038] The fourth determining unit is used to determine the primary module and the first backup module based on the frequency measurement deviation value between the non-faulty modules when a faulty module exists.

[0039] The fifth determining unit is used to determine the primary module, the first backup module, and the second backup module based on the frequency measurement deviation value between the non-faulty modules when no faulty module exists.

[0040] The control unit is used to control the main module to measure the turbine's unit frequency.

[0041] According to a fourth aspect of the present disclosure, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described in any one of the first aspects.

[0042] According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method as described in any one of the first aspects.

[0043] According to a sixth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the method as described in any one of the first aspects.

[0044] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: By determining the operating state of the governor; the operating state includes the start-up process state, the no-load state, and the power generation state; when the operating state is the start-up process state, based on the turbine unit frequency, a primary module, a first backup module, and a second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module; when the operating state is the no-load state or the power generation state, faulty modules and non-faulty modules are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module; if a faulty module exists, the primary module and the first backup module are determined based on the frequency measurement deviation value between the non-faulty modules; if no faulty module exists, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation value between the non-faulty modules; the primary module is controlled to measure the turbine unit frequency. Thus, the primary module and the backup module are flexibly adjusted according to the operating state of the governor and the frequency measurement deviation between the non-faulty modules, improving the accuracy of the governor in measuring the turbine unit frequency.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] Figure 1 This is a flowchart illustrating a method for controlling and measuring the frequency of a water turbine governor according to an exemplary embodiment.

[0048] Figure 2 This is a block diagram illustrating a turbine governor control and frequency measurement device according to an exemplary embodiment.

[0049] Figure 3 This is a block diagram of the gear disc frequency measurement module proposed in the embodiments of this application.

[0050] Figure 4 This is a block diagram illustrating another turbine governor control and frequency measurement device according to an exemplary embodiment.

[0051] Figure 5 This is a block diagram illustrating an apparatus for a method of controlling and measuring the frequency of a water turbine governor, according to an exemplary embodiment. Detailed Implementation

[0052] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0053] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0054] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the words “if” and “suppose” as used herein may be interpreted as “when”, “when”, or “in response to a determination”.

[0055] Furthermore, various forms of processes shown in the embodiments of this disclosure can be used to reorder, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0056] In related technologies, the turbine governor, as the core control equipment of a hydropower station, is responsible for regulating the frequency and power of the generating unit to ensure the stable operation of the power grid. Governor frequency measurement and control technology directly affects the dynamic response, regulation accuracy, and reliability of the governor system, and is one of the core technologies of the governor system.

[0057] Currently, the speed governors of large and medium-sized hydropower stations mainly use one gear disc and one voltage transformer (PT) for unit frequency measurement. During unit startup, gear disc frequency measurement is usually the primary method, with PT frequency measurement as a backup. When the unit enters no-load and generating states, PT frequency measurement becomes the primary method, with gear disc frequency measurement as a backup. The fault judgment logic for both gear disc and PT frequency measurement is basically based on the relationship between the collected voltage amplitude and the preset frequency range value to determine whether there is an abnormality. This method has a simple main / backup switching logic and poor accuracy.

[0058] To address the aforementioned problems, this disclosure provides a method, apparatus, and system for controlling and measuring the frequency of a turbine governor. The method involves considering the governor's operating state, including start-up, no-load, and power generation states. In the start-up state, based on the turbine's unit frequency, a primary module, a first backup module, and a second backup module are determined from a first toothed disc frequency measurement module, a second toothed disc frequency measurement module, and a voltage transformer (PT) module. In the no-load or power generation states, faulty and non-faulty modules are identified from these modules. If a faulty module exists, the primary module and the first backup module are determined based on the frequency measurement deviation between the non-faulty modules. If no faulty module exists, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation between the non-faulty modules. The primary module is then controlled to measure the turbine's unit frequency. This allows for flexible adjustment of the main and backup modules based on the governor's operating status and frequency measurement deviations between non-faulty modules, thereby improving the governor's accuracy in measuring the turbine unit's frequency.

[0059] Figure 1 This is a flowchart illustrating a method for controlling and measuring the frequency of a water turbine governor according to an exemplary embodiment, such as... Figure 1 As shown, it should be noted that the turbine governor control and frequency measurement method of this disclosure embodiment is applied in a turbine governor control and frequency measurement device. For example... Figure 1 As shown, the method may include the following steps:

[0060] Step 101: Determine the operating status of the speed controller.

[0061] The operating status includes the start-up process status, no-load status, and power generation status.

[0062] The frequency measurement module of the speed controller includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a voltage transformer (PT) module.

[0063] It should be noted that since the speed controller needs a certain amount of time to start up, the start-up process state can be the state of the speed controller from the start of start-up to the completion of start-up.

[0064] In one embodiment, a suitable primary frequency measurement module can be determined based on the operating status of the governor to measure the frequency of the turbine unit.

[0065] Step 102: When the operating state is the start-up process state, the main module, the first backup module and the second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module based on the turbine unit frequency.

[0066] In some embodiments of this application, step 102 may specifically include the following steps:

[0067] When the operating state is the power-on process state, the first toothed disc frequency measurement module is determined as the initial primary module, the second toothed disc frequency measurement module is determined as the initial first backup module, and the PT frequency measurement module is determined as the initial second backup module. The unit frequency is obtained by using the initial primary module.

[0068] When the unit frequency is less than the first preset frequency, the initial main module is determined as the main module, the second toothed disc frequency measurement module is determined as the first backup module, and the PT frequency measurement module is determined as the second backup module.

[0069] When the unit frequency is greater than or equal to the first preset frequency, the PT frequency measurement module is determined to be the main module, the first toothed disc frequency measurement module is determined to be the first backup module, and the second toothed disc frequency measurement module is determined to be the second backup module.

[0070] In one embodiment, when the speed controller receives the start-up command, it uses the first gear plate frequency measurement module as the initial primary module, determines the second gear plate frequency measurement module as the initial first backup module, and determines the PT frequency measurement module as the initial second backup module. That is, when starting up, the initial primary module is used to obtain the unit frequency. The initial primary module, the initial first backup module, and the initial second backup module can be preset.

[0071] Furthermore, in this embodiment, if the unit frequency is less than the first preset frequency, it indicates that the power-on process has not yet been completed. Therefore, the initial main module is determined as the main module, the second gear frequency measurement module is determined as the first backup module, and the PT frequency measurement module is determined as the second backup module. If the unit frequency is greater than or equal to the first preset frequency, it indicates that the power-on process has been completed. Therefore, the PT frequency measurement module is determined as the main module, the first gear frequency measurement module is determined as the first backup module, and the second gear frequency measurement module is determined as the second backup module.

[0072] In some embodiments of this application, step 102 may further include the following steps: when the running state is the power-on process state and the first gear plate frequency measurement module, the second gear plate frequency measurement module and the voltage transformer PT module are all faulty modules, the speed controller controls the speed controller to stop.

[0073] Understandably, when the turbine is in the startup phase and all three frequency measurement modules (first gear plate, second gear plate, and voltage transformer PT) are faulty, it is impossible to measure the turbine's frequency. Therefore, the governor is controlled to shut down.

[0074] Step 103: When the operating state is either no-load or generating state, identify the faulty and non-faulty modules in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module.

[0075] It should be noted that the specific implementation method for determining whether the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module have failed can be implemented using existing technologies, and will not be elaborated in this application.

[0076] In one embodiment, when the operating state is either no-load or power generation, it can be determined whether any of the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module are faulty. The faulty module is identified as the aforementioned faulty module, and the non-faulty module is identified as the aforementioned non-faulty module.

[0077] Step 104: In the case of a faulty module, determine the primary module and the first backup module based on the frequency measurement deviation value between the non-faulty modules.

[0078] In one embodiment, the frequency measurement deviation is the difference between the frequency measurement value of one non-faulty module and the frequency measurement value of another non-faulty module.

[0079] Understandably, in the presence of a faulty module, since the faulty module cannot be used as the primary module to measure the turbine's frequency, it is necessary to re-determine the primary and backup modules among the non-faulty modules. Furthermore, if there are two non-faulty modules, the frequency measurement deviation between the two modules can be determined. A large deviation indicates that at least one non-faulty module is malfunctioning.

[0080] Therefore, in one embodiment, in the presence of a faulty module, the primary module and the first backup module are determined based on the frequency measurement deviation value between the non-faulty modules.

[0081] In some embodiments of this application, step 104 may specifically include the following steps:

[0082] If the PT module is a faulty module and the first and second gear frequency measurement modules are non-faulty modules, the first gear frequency measurement module is determined to be the primary module and the second gear frequency measurement module is determined to be the first backup module.

[0083] If the PT module and the first toothed disc frequency measurement module are faulty modules, and the second toothed disc frequency measurement module is a non-faulty module, then the second toothed disc frequency measurement module is determined to be the main module.

[0084] If the first gear plate frequency measurement module is a faulty module, and the second gear plate frequency measurement module and PT module are non-faulty modules, and the frequency measurement deviation between the second gear plate frequency measurement module and PT module is greater than the first deviation value, then the second gear plate frequency measurement module is determined to be the main module.

[0085] If the second gear plate frequency measurement module is a faulty module, and the first gear plate frequency measurement module and PT module are non-faulty modules, and the frequency measurement deviation between the first gear plate frequency measurement module and PT module is greater than the first deviation value, then the first gear plate frequency measurement module is determined to be the main module.

[0086] If the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer (PT) module are all faulty, the speed controller will switch from automatic operation mode to manual operation mode.

[0087] In one embodiment, if the PT module is a faulty module and the first toothed disc frequency measurement module and the second toothed disc frequency measurement module are non-faulty modules, the first toothed disc frequency measurement module is determined to be the primary module and the second toothed disc frequency measurement module is determined to be the first backup module. In addition, PT module frequency measurement fault information can also be output.

[0088] In another embodiment, if the PT module and the first toothed disc frequency measurement module are faulty modules, and the second toothed disc frequency measurement module is a non-faulty module, the second toothed disc frequency measurement module is determined to be the main module. In addition, frequency measurement fault information of the PT module and the first toothed disc frequency measurement module can also be output.

[0089] In another embodiment, if the first toothed disc frequency measurement module is a faulty module, and the second toothed disc frequency measurement module and the PT module are non-faulty modules, and the frequency measurement deviation between the second toothed disc frequency measurement module and the PT module is greater than the first deviation value, the second toothed disc frequency measurement module is determined to be the main module. In addition, the frequency measurement fault information of the first toothed disc frequency measurement module and the PT module can also be output.

[0090] In another embodiment, if the second gear plate frequency measurement module is a faulty module, and the first gear plate frequency measurement module and PT module are non-faulty modules, and the frequency measurement deviation between the first gear plate frequency measurement module and PT module is greater than a first deviation value, the first gear plate frequency measurement module is determined to be the main module. In addition, frequency measurement fault information of the second gear plate frequency measurement module and PT module can also be output.

[0091] It should be noted that an abnormal operating state during generator set operation is not allowed, called asynchronous networking. In asynchronous networking, the generator and the power grid are connected, and the frequency detected by the PT module is the frequency of the power grid, which cannot represent the frequency of the generator set. The frequency measured by the gear plate module is the true frequency of the generator set. Therefore, if one of the driver's gear plate frequency measurement modules or the second gear plate frequency measurement module fails, and the frequency measurement deviation between the fault-free gear plate frequency measurement module and the PT module is greater than the first deviation value, the fault-free gear plate frequency measurement module will be used as the primary module. It will be assumed that the PT module has a frequency measurement fault, and the frequency measurement fault information of the PT module will be output.

[0092] In some embodiments of this application, when at least one of the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer PT module is a non-faulty module, the tachometer is in automatic operation mode. When all three modules are faulty, the speed controller switches from automatic operation mode to manual operation mode, that is, it is switched to manual control.

[0093] Step 105: In the absence of a faulty module, determine the primary module, the first backup module, and the second backup module based on the frequency measurement deviation values ​​between the non-faulty modules.

[0094] In one embodiment, the frequency measurement deviation is the difference between the frequency measurement value of one non-faulty module and the frequency measurement value of another non-faulty module.

[0095] Understandably, the frequency deviation values ​​that have not experienced faults can be compared with the frequency values ​​measured by the primary module, the first backup module, and the second backup module. The frequency measurement modules with large differences in frequency measurement results are identified as modules with abnormalities, and the primary module and backup module are identified from the modules without abnormalities, thereby further improving the rationality of the primary and backup module configuration.

[0096] In some embodiments of this application, step 105 may specifically include the following steps:

[0097] If the frequency measurement deviation between the PT module and the first toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is less than the second deviation value, then the first toothed disc frequency measurement module is determined to be the main module, and the deviation alarm information of the PT module is output.

[0098] If the frequency measurement deviation between the first toothed disc frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the first toothed disc frequency measurement module is output.

[0099] If the frequency measurement deviation between the second gear plate frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the second gear plate frequency measurement module and the first gear plate frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the first gear plate frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the second gear plate frequency measurement module is output.

[0100] In one embodiment, the first deviation value is greater than the second deviation value. It is understood that a large deviation between the two frequency measurement modules indicates that at least one of them is faulty, while a small deviation suggests that both modules are likely functioning correctly. Therefore, the frequency deviation can be calculated pairwise between the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the PT module. Based on this deviation, the faulty module can be identified, and the module that is functioning correctly can be used as the primary or backup module, thus improving the accuracy of measuring the turbine's unit frequency.

[0101] Furthermore, compared to existing technologies that merely compare the frequency measurement results with a preset range value and only determine the frequency measurement module as abnormal if it does not fall within the preset range, this disclosure employs two toothed disc frequency measurement modules. By comparing the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the PT module, the abnormal frequency measurement module is accurately identified. This avoids the problem in existing technologies where the set range is too large, leading to the inability to detect abnormalities, and further improves the accuracy of measuring the unit frequency of the water turbine.

[0102] Step 106: Control the main module to measure the turbine unit frequency.

[0103] In one embodiment, the main module and the backup module can be dynamically adjusted according to the operating status of the governor and the frequency measurement deviation between non-faulty modules. The currently selected main module is controlled to measure the turbine unit frequency, thereby enabling the use of the frequency measurement module most suitable for the current situation to measure the unit frequency, thus improving the accuracy of frequency measurement.

[0104] According to the turbine governor control and frequency measurement method proposed in this disclosure, the operating state of the governor is determined. The operating state includes start-up, no-load, and power generation states. When the operating state is start-up, a primary module, a first backup module, and a second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer (PT) module based on the turbine's unit frequency. When the operating state is no-load or power generation, faulty modules and non-faulty modules are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer (PT) module. If a faulty module exists, the primary module and the first backup module are determined based on the frequency measurement deviation between the non-faulty modules. If no faulty module exists, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation between the non-faulty modules. The primary module is controlled to measure the turbine's unit frequency. Therefore, the primary and backup modules are flexibly adjusted according to the governor's operating state and the frequency measurement deviation between the non-faulty modules, improving the accuracy of the governor in measuring the turbine's unit frequency.

[0105] Figure 2 This is a block diagram illustrating a turbine governor control and frequency measurement device according to an exemplary embodiment. (Refer to...) Figure 2 The device includes a frequency measurement module, a frequency signal processing module, and a controller module. The frequency measurement module includes a first toothed disc frequency measurement module, a second toothed disc frequency measurement module, and a PT module, wherein:

[0106] The input terminals of the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the PT module are respectively connected to the turbine unit; the first toothed disc frequency measurement module is connected to the first frequency signal processing module, and the second toothed disc frequency measurement module is connected to the second frequency signal processing module; the PT module is connected to the main PCC controller through the third frequency signal processing module; the PT module is connected to the backup PCC controller through the fourth frequency signal processing module; the first, second, third, and fourth frequency signal processing modules are all connected to the main PCC controller, and the first, second, third, and fourth frequency signal processing modules are all connected to the backup PCC controller.

[0107] In this embodiment, the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the PT module can measure the real-time frequency of the unit in different ways, and after processing by the frequency processing module, the frequency is sent to the PCC controller in the form of a square wave. The PCC controller automatically selects and switches between primary and backup frequency measurement sources based on its own operating status and the detected and judged frequency signal.

[0108] Furthermore, in this embodiment of the application, in order to ensure the normal operation of the turbine governor control and frequency measurement device, a frequency signal processing module is configured for each of the first gear plate frequency measurement module, the second gear plate frequency measurement module and the PT module. Compared with multiple frequency measurement modules sharing the same frequency signal processing module, this avoids the situation where all frequency measurement modules cannot be used normally if the frequency signal processing module has a problem, thus improving the stability of the governor frequency measurement.

[0109] In addition, in this embodiment of the application, in order to further improve the stability of the speed controller frequency measurement, a third frequency signal processing module and a main PCC controller, a fourth frequency signal processing module and a backup PCC controller are configured for the PT module, so that in the event of a failure of the third frequency signal processing module and / or the main PCC controller, the system can switch to the fourth frequency signal processing module and the backup PCC controller in a timely manner.

[0110] In one example, such as Figure 3 As shown, the gear plate frequency measurement module (i.e., the speed measuring probe measures the speed of the gear plate and generates a rectangular signal) in the signal generation unit sends the rectangular signal to the signal measurement and processing unit (i.e., the frequency signal processing module). The signal measurement and processing unit performs comprehensive processing such as shaping and filtering on the rectangular signal to obtain the processed signal, and sends the processed signal to the PCC controller of the speed controller.

[0111] According to the turbine governor control and frequency measurement device proposed in this disclosure, the input terminals of the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the PT module are respectively connected to the turbine unit. The first gear plate frequency measurement module is connected to the first frequency signal processing module, and the second gear plate frequency measurement module is connected to the second frequency signal processing module. The PT module is connected to the main PCC controller through the third frequency signal processing module, and the PT module is connected to the backup PCC controller through the fourth frequency signal processing module. The first, second, third, and fourth frequency signal processing modules are all connected to the main PCC controller, and the first, second, third, and fourth frequency signal processing modules are all connected to the backup PCC controller. This allows for flexible adjustment of the main and backup modules based on the governor's operating status and the frequency measurement deviation between non-faulty modules, thereby improving the accuracy of the governor in measuring the turbine unit's frequency.

[0112] Figure 4 This is a block diagram illustrating another turbine governor control and frequency measurement device according to an exemplary embodiment. (Refer to...) Figure 4 The device includes a first determining unit 401, a second determining unit 402, a third determining unit 403, a fourth determining unit 404, a fifth determining unit 405, and a control unit 406.

[0113] The first determining unit 401 is used to determine the operating status of the speed governor; the operating status includes the start-up process status, no-load status and power generation status; the frequency measurement module of the speed governor includes the first gear plate frequency measurement module, the second gear plate frequency measurement module and the voltage transformer PT module.

[0114] The second determining unit 402 is used to determine the main module, the first backup module and the second backup module from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module based on the turbine unit frequency when the operating state is the start-up process state.

[0115] The third determining unit 403 is used to determine the faulty module and the non-faulty module in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module when the operating state is no-load state or power generation state.

[0116] The fourth determining unit 404 is used to determine the primary module and the first backup module based on the frequency measurement deviation value between the non-faulty modules when a faulty module exists.

[0117] The fifth determining unit 405 is used to determine the primary module, the first backup module, and the second backup module based on the frequency measurement deviation value between the non-faulty modules when there is no faulty module.

[0118] Control unit 406 is used to control the main module to measure the turbine unit frequency.

[0119] In some embodiments of this application, the second determining unit 402 may specifically be used for:

[0120] When the operating state is the power-on process state, the first toothed disc frequency measurement module is determined as the initial primary module, the second toothed disc frequency measurement module is determined as the initial first backup module, and the PT frequency measurement module is determined as the initial second backup module. The unit frequency is obtained by using the initial primary module.

[0121] When the unit frequency is less than the first preset frequency, the initial main module is determined as the main module, the second toothed disc frequency measurement module is determined as the first backup module, and the PT frequency measurement module is determined as the second backup module.

[0122] When the unit frequency is greater than or equal to the first preset frequency, the PT frequency measurement module is determined to be the main module, the first toothed disc frequency measurement module is determined to be the first backup module, and the second toothed disc frequency measurement module is determined to be the second backup module.

[0123] In some embodiments of this application, the second determining unit 402 may also be used to: control the speed controller to stop the speed controller when the running state is the power-on process state and the first gear plate frequency measurement module, the second gear plate frequency measurement module and the voltage transformer PT module are all faulty modules.

[0124] In some embodiments of this application, the fourth determining unit 404 may specifically be used for:

[0125] If the PT module is a faulty module and the first and second gear frequency measurement modules are non-faulty modules, the first gear frequency measurement module is determined to be the primary module and the second gear frequency measurement module is determined to be the first backup module.

[0126] If the PT module and the first toothed disc frequency measurement module are faulty modules, and the second toothed disc frequency measurement module is a non-faulty module, then the second toothed disc frequency measurement module is determined to be the main module.

[0127] If the first gear plate frequency measurement module is a faulty module, and the second gear plate frequency measurement module and PT module are non-faulty modules, and the frequency measurement deviation between the second gear plate frequency measurement module and PT module is greater than the first deviation value, then the second gear plate frequency measurement module is determined to be the main module.

[0128] If the second gear plate frequency measurement module is a faulty module, and the first gear plate frequency measurement module and PT module are non-faulty modules, and the frequency measurement deviation between the first gear plate frequency measurement module and PT module is greater than the first deviation value, then the first gear plate frequency measurement module is determined to be the main module.

[0129] If the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer (PT) module are all faulty, the speed controller will switch from automatic operation mode to manual operation mode.

[0130] In some embodiments of this application, the fifth determining unit 405 may specifically be used for:

[0131] If the frequency measurement deviation between the PT module and the first toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is less than the second deviation value, then the first toothed disc frequency measurement module is determined to be the main module, and the deviation alarm information of the PT module is output.

[0132] If the frequency measurement deviation between the first toothed disc frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the first toothed disc frequency measurement module is output.

[0133] If the frequency measurement deviation between the second gear plate frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the second gear plate frequency measurement module and the first gear plate frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the first gear plate frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the second gear plate frequency measurement module is output.

[0134] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0135] According to the turbine governor control and frequency measurement device proposed in this embodiment, the operating state of the governor is determined. The operating state includes start-up state, no-load state, and power generation state. When the operating state is the start-up state, a primary module, a first backup module, and a second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer (PT) module based on the turbine's unit frequency. When the operating state is either no-load or power generation state, faulty modules and non-faulty modules are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer (PT) module. If a faulty module exists, the primary module and the first backup module are determined based on the frequency measurement deviation between the non-faulty modules. If no faulty module exists, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation between the non-faulty modules. The primary module is controlled to measure the turbine's unit frequency. Therefore, the primary and backup modules are flexibly adjusted according to the governor's operating state and the frequency measurement deviation between the non-faulty modules, improving the accuracy of the governor in measuring the turbine's unit frequency.

[0136] Figure 5 This is a block diagram illustrating an apparatus for a method of controlling and measuring the frequency of a water turbine governor, according to an exemplary embodiment. For example, apparatus 500 may be an electronic device, such as a mobile phone, computer, digital broadcasting terminal, messaging device, tablet device, personal digital assistant, etc.

[0137] Reference Figure 5 The device 500 may include one or more of the following components: a processing component 502, a memory 504, a power component 506, a multimedia component 508, an audio component 510, an input / output (I / O) interface 512, a sensor component 514, and a communication component 516.

[0138] Processing component 502 typically controls the overall operation of device 500, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0139] Memory 504 is configured to store various types of data to support the operation of device 500. Examples of this data include instructions for any application or method operating on device 500, contact data, phonebook data, messages, pictures, videos, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0140] The power supply component 506 provides power to the various components of the device 500. The power supply component 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 500.

[0141] Multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0142] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0143] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0144] Sensor assembly 514 includes one or more sensors for providing status assessments of various aspects of device 500. For example, sensor assembly 514 can detect the on / off state of device 500, the relative positioning of components such as the display and keypad of device 500, changes in position of device 500 or a component of device 500, the presence or absence of user contact with device 500, and the orientation or acceleration / deceleration of device 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact.

[0145] Communication component 516 is configured to facilitate wired or wireless communication between device 500 and other devices. Device 500 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0146] In an exemplary embodiment, the apparatus 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0147] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, which can be executed by a processor 520 of the device 500 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0148] In an exemplary embodiment, a computer program product is also provided, including a computer program that implements the above-described method when executed by the processor 520 of the device 500.

[0149] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0150] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for controlling and measuring the frequency of a water turbine governor, characterized in that, include: The operating status of the speed governor is determined; the operating status includes the start-up process status, no-load status, and power generation status; the frequency measurement module of the speed governor includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a voltage transformer (PT) module. When the operating state is the start-up process state, the main module, the first backup module and the second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module based on the turbine unit frequency; When the operating state is either no-load or power generation, determine the faulty and non-faulty modules in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module. In the presence of a faulty module, the primary module and the first backup module are determined based on the frequency measurement deviation between the non-faulty modules. In the absence of faulty modules, the primary module, the first backup module, and the second backup module are determined based on the frequency measurement deviation values ​​between the non-faulty modules. The main module is controlled to measure the unit frequency of the water turbine.

2. The method for controlling and measuring the frequency of a turbine governor according to claim 1, characterized in that, When the operating state is the start-up process state, based on the turbine unit frequency, the primary module, the first backup module, and the second backup module are determined from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module, including: When the operating state is the power-on process state, the first toothed disc frequency measurement module is determined as the initial primary module, the second toothed disc frequency measurement module is determined as the initial first backup module, and the PT frequency measurement module is determined as the initial second backup module. The unit frequency is obtained using the initial primary module. When the unit frequency is less than the first preset frequency, the initial main module is determined as the main module, the second toothed disc frequency measurement module is determined as the first backup module, and the PT frequency measurement module is determined as the second backup module. When the unit frequency is greater than or equal to the first preset frequency, the PT frequency measurement module is determined to be the main module, the first toothed disc frequency measurement module is determined to be the first backup module, and the second toothed disc frequency measurement module is determined to be the second backup module.

3. The turbine governor control and frequency measurement method according to claim 2, characterized in that, The method also includes: If the operating state is the power-on process state and the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer PT module are all faulty modules, the speed controller will be stopped.

4. The method for controlling and measuring the frequency of a turbine governor according to claim 1, characterized in that, In the event of a faulty module, determining the primary module and the first backup module based on the frequency measurement deviation between the non-faulty modules includes: If the PT module is a faulty module and the first and second gear plate frequency measurement modules are non-faulty modules, the first gear plate frequency measurement module is determined to be the primary module and the second gear plate frequency measurement module is determined to be the first backup module. If the PT module and the first toothed disc frequency measurement module are faulty modules, and the second toothed disc frequency measurement module is a non-faulty module, then the second toothed disc frequency measurement module is determined to be the main module. If the first toothed disc frequency measurement module is a faulty module, and the second toothed disc frequency measurement module and the PT module are non-faulty modules, and the frequency measurement deviation between the second toothed disc frequency measurement module and the PT module is greater than the first deviation value, then the second toothed disc frequency measurement module is determined to be the main module. If the second gear plate frequency measurement module is a faulty module, and the first gear plate frequency measurement module and the PT module are non-faulty modules, and the frequency measurement deviation between the first gear plate frequency measurement module and the PT module is greater than the first deviation value, then the first gear plate frequency measurement module is determined to be the main module. If the first gear plate frequency measurement module, the second gear plate frequency measurement module, and the voltage transformer (PT) module are all faulty, the speed controller will switch from automatic operation mode to manual operation mode.

5. The method for controlling and measuring the frequency of a turbine governor according to claim 1, characterized in that, The step of determining the primary module, the first backup module, and the second backup module based on the frequency measurement deviation value between the non-faulty modules includes: If the frequency measurement deviation between the PT module and the first toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is less than the second deviation value, then the first toothed disc frequency measurement module is determined to be the main module, and the deviation alarm information of the PT module is output. If the frequency measurement deviation between the first toothed disc frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the first toothed disc frequency measurement module and the second toothed disc frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the second toothed disc frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the first toothed disc frequency measurement module is output. If the frequency measurement deviation between the second gear plate frequency measurement module and the PT module is greater than the first deviation value, and the frequency measurement deviation between the second gear plate frequency measurement module and the first gear plate frequency measurement module is greater than the first deviation value, and the frequency measurement deviation between the PT module and the first gear plate frequency measurement module is less than the second deviation value, then the PT module is determined to be the main module, and the deviation alarm information of the second gear plate frequency measurement module is output.

6. A turbine governor control and frequency measurement device, characterized in that, It includes a frequency measurement module, a frequency signal processing module, and a controller module. The frequency measurement module includes a first toothed disc frequency measurement module, a second toothed disc frequency measurement module, and a PT module, wherein: The input terminals of the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the PT module are respectively connected to the turbine unit; The first toothed disc frequency measurement module is connected to the first frequency signal processing module, and the second toothed disc frequency measurement module is connected to the second frequency signal processing module. The PT module is connected to the main PCC controller through a third frequency signal processing module; The PT module is connected to the backup PCC controller via the fourth frequency signal processing module; The first frequency signal processing module, the second frequency signal processing module, the third frequency signal processing module, and the fourth frequency signal processing module are all connected to the primary PCC controller, and the first frequency signal processing module, the second frequency signal processing module, the third frequency signal processing module, and the fourth frequency signal processing module are all connected to the backup PCC controller.

7. A turbine governor control and frequency measurement device, characterized in that, include: The first determining unit is used to determine the operating status of the speed governor; the operating status includes the start-up process status, no-load status, and power generation status; the frequency measurement module of the speed governor includes a first gear plate frequency measurement module, a second gear plate frequency measurement module, and a voltage transformer (PT) module. The second determining unit is used to determine the main module, the first backup module, and the second backup module from the first toothed disc frequency measurement module, the second toothed disc frequency measurement module, and the voltage transformer PT module based on the turbine's unit frequency when the operating state is the start-up process state. The third determining unit is used to determine the faulty module and the non-faulty module in the first toothed disc frequency measurement module, the second toothed disc frequency measurement module and the voltage transformer PT module when the operating state is an unloaded state or a power generation state. The fourth determining unit is used to determine the primary module and the first backup module based on the frequency measurement deviation value between the non-faulty modules when a faulty module exists. The fifth determining unit is used to determine the primary module, the first backup module, and the second backup module based on the frequency measurement deviation value between the non-faulty modules when no faulty module exists. The control unit is used to control the main module to measure the turbine's unit frequency.

8. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described in any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, The computer program, when executed by a processor, implements the method as described in any one of claims 1 to 5.

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