Control unit and control method

Abstract

To suppress the occurrence of abnormalities in a power generator.SOLUTION: An acquisition part 522 obtains abnormality information indicating a location of an abnormality in the power generator. A change part 526 performs prescribed control to suppress abnormality in another power generator relating to the power generator based on the abnormality information.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a control device and a control method. [Background technology]

[0002] For example, Japanese Patent No. 4995134 (Patent Document 1) discloses a monitoring device that monitors the state of a wind turbine installed in a wind power generation facility. This monitoring device quantitatively evaluates the state of the wind turbine according to appropriate standards. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4995134 Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to suppress the occurrence of abnormalities in power generation devices such as wind power generation devices. The present disclosure has been made to solve the above-mentioned problems, and aims to suppress the occurrence of abnormalities in power generation devices. [Means for solving the problem]

[0005] The control device of the present disclosure includes an interface configured to acquire abnormality information of the power generation device, and a calculation device. The abnormality information is information indicating an abnormal location or a location of a possible abnormality in the power generation device, or information used by the calculation device to identify the abnormal location or the location of a possible abnormality in the power generation device. The calculation device executes a predetermined control for suppressing an abnormality in another power generation device related to the power generation device based on the abnormality information.

[0006] The control method of the present disclosure includes acquiring anomaly information that is information indicating an abnormal location or a location indicating an abnormality in a power generation device or information used by a computing device to identify the abnormal location or the location indicating an abnormality in the power generation device, and executing a predetermined control for suppressing an abnormality in another power generation device related to the power generation device based on the anomaly information. Effect of the Invention

[0007] According to the present disclosure, the occurrence of abnormalities in the power generation device can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of a configuration of a management system 10 according to the present disclosure. [Diagram 2] FIG. 2 is a functional block diagram of a control device 51 and a control device 52. [Diagram 3] 13 is a diagram for explaining change control of a monitoring parameter 530. FIG. [Figure 4] 4 is a flowchart showing the flow of main processes performed by the control device 51 and the control device 52. [Diagram 5] FIG. 4 is a diagram for explaining a first variation control. [Figure 6] FIG. 11 is a diagram for explaining a second variation control. [Figure 7] FIG. 11 is a diagram for explaining a third variation control. [Figure 8] FIG. 11 is a diagram for explaining a predetermined condition. [Figure 9] FIG. 4 is a diagram illustrating an example of a user table. [Figure 10] 1 is a diagram for explaining an example of possibility information 72 displayed on a user terminal 70. FIG. [Figure 11] 10 is a diagram for explaining an example of undetected information 114 displayed on a display device 104. FIG. [Figure 12] FIG. 11 is a diagram for explaining an example of a configuration of a management system 10A according to another embodiment. [Figure 13] FIG. 2 is a functional block diagram of a control device 52. [Figure 14] 10 is a diagram for explaining an example of a screen displayed on a worker terminal 60. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts are given the same reference numerals, and the description thereof will not be repeated. In addition, it is intended from the beginning that at least a part of the configurations in each embodiment will be used in appropriate combination.

[0010] First Embodiment FIG. 1 is a diagram showing an example of the configuration of a management system 10 according to the present disclosure. The management system 10 according to the present disclosure includes M (M is an integer equal to or greater than 2) power generation units, a management device 100, at least one user terminal 70, and a network NW. The M power generation units include a first power generation unit 61 and a second power generation unit 62. In FIG. 1, the first power generation unit 61 and the second power generation unit 62 are mainly shown. In addition, the management device 100, a control device 51 (described later), a control device 52 (described later), and the user terminal 70 are capable of communicating with each other via the network NW.

[0011] The management device 100 is a device that manages M power generation units. The management device 100 is, for example, a terminal device operated by an administrator B of the management system 10. An input device 102 and a display device 104 are connected to the management device 100. The display device 104 displays various information. Various commands are input to the input device 102 by the administrator B.

[0012] The first power generating unit 61 includes a first wind turbine power generating device 21, a first sensor group S1n (n=1,...,N) consisting of N sensors, a collecting device 31, and a control device 51. The first sensor group S1n corresponds to "at least one first sensor" in this disclosure.

[0013] The second power generating unit 62 includes a second wind power generating device 22, a second sensor group S2n consisting of N sensors, a collecting device 32, and a control device 52. The second sensor group S2n corresponds to "at least one second sensor" in the present disclosure. In this embodiment, the number of sensors constituting the first sensor group S1n is the same as the number of sensors constituting the second sensor group S2n. However, the number of sensors constituting the first sensor group S1n may be different from the number of sensors constituting the second sensor group S2n. In the following, the first power generating unit 61 and the second power generating unit 62 will be mainly described.

[0014] The M power generation units are related to each other. More specifically, the wind power generation devices of the M wind power generation units are related to each other. Here, "related" means that the M wind power generation devices have the same configuration and constitute the same wind farm WF. Therefore, the external environments (temperature, humidity, air volume, etc.) of the M power generation units are similar. Note that, as a modified example, "related" may be a concept that includes at least one of the M wind power generation devices having the same start time of operation and the M wind power generation devices being the same model.

[0015] The first wind turbine generator 21 and the second wind turbine generator 22 are related to each other. The first wind turbine generator 21 corresponds to the "power generation device" in the present disclosure, and the second wind turbine generator 22 corresponds to the "other power generation device" in the present disclosure. In the present embodiment, for the sake of simplicity, an example will be described in which the other power generation device is the second wind turbine generator 22. However, the other power generation device may be a plurality of wind turbine generators including the second wind turbine generator 22.

[0016] The first wind power generation device 21 and the second wind power generation device 22 are devices that receive wind power and generate electricity. The first wind power generation device 21 and the second wind power generation device 22 each have a wind turbine, a bearing, a gearbox, a generator, etc. The first sensor group S1n is disposed at a predetermined location (for example, a bearing, a gearbox, and a generator) of the first wind power generation device 21. The physical quantities detected by each of the first sensor group S1n are output to the collection device 31. The second sensor group S2n is disposed at a predetermined location (for example, a bearing, a gearbox, and a generator) of the second wind power generation device 22. The physical quantities detected by each of the second sensor group S2n are output to the collection device 32.

[0017] Here, the first sensor group S1n corresponds to the second sensor group S2n. That is, the first sensor group S1n and the second sensor group S2n have the same sensor type, and the types of physical quantities detected by the first sensor group S1n are the same as the types of physical quantities detected by the second sensor group S2n. Furthermore, the locations of the first sensor group S1n in the first wind turbine generator 21 are the same as the locations of the second sensor group S2n in the second wind turbine generator 22.

[0018] An ID (Identification) is assigned to each of the first sensor group S1n and the second sensor group S2n. That is, a sensor ID is assigned to each of the N sensors constituting the first sensor group S1n and the N sensors constituting the second sensor group S2n. An ID is also assigned to the user terminal 70. An ID is also assigned to each of the wind power generation devices (such as the first wind power generation device 21 and the second wind power generation device 22) of the M power generation units.

[0019] Typically, both the first sensor group S1n and the second sensor group S2n are vibration sensors. However, the sensors may be other sensors. The other sensors may be, for example, temperature sensors, sound sensors, etc.

[0020] Hereinafter, the physical quantities detected by the first sensor group S1n may be referred to as "N first physical quantities," and the physical quantities detected by the second sensor group S2n may be referred to as "N second physical quantities." Furthermore, the first wind power generation device 21 and the second wind power generation device 22 may be collectively referred to as "wind power generation devices." The first sensor group S1n and the second sensor group S2n may be collectively referred to as "N sensors." The collection device 31 and the collection device 32 may be collectively referred to as "collection devices." The control device 51 and the control device 52 may be collectively referred to as "control devices."

[0021] The N physical quantities output from the N sensors are output to a collecting device. The collecting device collects the N physical quantities and outputs them to a control device. The control device uses the N physical quantities to monitor the wind power generation device corresponding to the control device. The monitoring process is, for example, a process of collecting the N physical quantities over a predetermined period (for example, the monitoring period S in FIG. 5) and detecting the presence or absence of an abnormality based on the collected physical quantities. An abnormality is, for example, damage to the wind power generation device.

[0022] Typically, the control device generates a frequency spectrum by performing a fast Fourier transform or the like on the physical quantity detected by the vibration sensor. Then, the control device identifies the presence or absence of an abnormality and the abnormality or a location that is a sign of an abnormality based on the generated frequency spectrum and the natural frequency corresponding to the abnormality location.

[0023] That is, the type of physical quantity is a vibration level (acceleration, velocity, displacement, etc.). The first sensor group S1n and the second sensor group S2n include a vibration sensor that detects the magnitude of vibration in a low-frequency concentration band and a vibration sensor that detects the magnitude of vibration in a high-frequency concentration band.

[0024] When the control device 51 detects an abnormality in the first wind power generation device 21 as a result of monitoring, it transmits abnormality information indicating the detection of the abnormality to the management device 100. Here, the abnormality information is information indicating an abnormal location or an abnormality precursor location of the power generation device (first wind power generation device 21). In this embodiment, as shown in FIG. 2 described later, the control device 51 itself detects the abnormal location or an abnormality precursor location. Note that, although the following mainly describes a configuration in which the control device 51 detects an abnormality location, a configuration in which the control device 51 detects an abnormality precursor location may also be adopted. An abnormality precursor location is a location where no abnormality has occurred at present, but where an abnormality is expected to occur in the future.

[0025] The control device 52 monitors the second wind power generation device 22 by using the N physical quantities output from the collection device 32. When the control device 52 detects an abnormality in the second wind power generation device 22 as a result of the monitoring, the control device 52 transmits abnormality information indicating the location of the abnormality to the management device 100.

[0026] The management device 100 can recognize an abnormality in the first wind turbine generator 21 and an abnormality in the second wind turbine generator 22 based on the abnormality information from the control device 51 and the abnormality information from the control device 52 .

[0027] The control device 51 has an arithmetic unit 201, a memory 202, and an interface 203. In the example of FIG. 1, the interface is described as "I / F". The arithmetic unit 201 executes various processes and calculations. Each component is connected to each other by a data bus. The memory 202 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

[0028] The arithmetic device 201 is configured with a central processing unit (CPU), a field-programmable gate array (FPGA), a graphics processing unit (GPU), and the like. The arithmetic device 201 may be configured with at least one of the CPU, the FPGA, and the GPU. The arithmetic device 201 may also be configured with a processing circuitry. The arithmetic device 201 is also referred to as "at least one processor" or "arithmetic circuitry."

[0029] The memory 202 includes a volatile storage area (e.g., a working area) that temporarily stores program code, a work memory, and the like when the arithmetic device 201 executes an arbitrary program. For example, the memory 202 includes a random access memory (RAM) and a read only memory (ROM).

[0030] The ROM stores programs executed by the arithmetic unit 201. The RAM temporarily stores data generated by the execution of the programs in the arithmetic unit 201. The RAM can function as a temporary data memory used as a working area.

[0031] The interface 203 is configured to communicate with devices external to the control device 51 (such as a collection device, a management device 100, etc.).

[0032] Although not specifically shown, the control device 52 and the computing devices of the other power generating units also have computing devices, memories, and interfaces.

[0033] The user terminal 70 is a terminal device owned by the user A. A "user" typically refers to a person who owns a wind power generation device (such as the first wind power generation device and the second wind power generation device 22). The user terminal 70 is typically a portable terminal that the user A can carry with him or her. The user terminal 70 may also be a dedicated computer terminal.

[0034] [Functional block diagram of control device 51 and control device 52] Fig. 2 is a functional block diagram of the control device 51 and the control device 52. In Fig. 2, the block diagram of the control device 51 and the block diagram of the control device 52 are depicted as different for the sake of clarity, but in reality they are the same.

[0035] 2, the control device 51 has an acquisition unit 512 and a detection unit 514. The control device 52 has an acquisition unit 522, a detection unit 524, a change unit 526, and a storage unit 528. The acquisition unit 512 and the acquisition unit 522 correspond to the above-mentioned interface 203. The detection unit 514, the detection unit 524, and the change unit 526 correspond to the above-mentioned arithmetic device 201. The storage unit 528 corresponds to the memory 202, and at least a part of the storage area of ​​the memory 202 is applied to the storage unit 528.

[0036] The storage unit 528 stores the monitoring parameters 530. The monitoring parameters 530 are used for monitoring the second wind power generation device 22. The monitoring parameters 530 are parameters according to the type of physical quantity. The monitoring parameters 530 are also called monitoring conditions. In this embodiment, as described above, the type of physical quantity is the vibration level, so the monitoring parameters 530 are a frequency band, a threshold value corresponding to the frequency band, and the above-mentioned natural frequency. The monitoring parameters are stored in M ​​control devices such as the control device 51. As will be described later, the monitoring parameters are changed by the change unit 526, but the types and values ​​of the monitoring parameters before the change are all the same in the M control devices.

[0037] In this embodiment, an example will be described in which the control device 51 detects an abnormality in the first wind turbine generator 21, and the change unit 526 of the control device 52 updates the monitoring parameters 530 (see FIG. 2) in response to the abnormality.

[0038] Next, a control flow of the control device 51, the control device 52, etc. will be described with reference to Fig. 2. The acquisition unit 512 acquires N first physical quantities from the first sensor group S1n. The N first physical quantities are transmitted to the detection unit 514.

[0039] The detection unit 514 detects an abnormality in the first wind turbine generator 21 based on the N first physical quantities and a monitoring parameter (not shown). When the detection unit 514 detects an abnormality, the detection unit 514 generates the above-mentioned abnormality information.

[0040] The abnormality information includes information indicating the abnormal location of the first wind power generation plant 21, a frequency band of an intensity corresponding to the abnormality of the first wind power generation plant 21 (i.e., a frequency band corresponding to the natural frequency, hereinafter also referred to as "abnormal frequency band"), and the like. The information indicating the abnormal location is, for example, the sensor ID of the first sensor S1n. The location where the first sensor of that sensor ID is located is the abnormal location.

[0041] The detection unit 514 transmits the generated anomaly information to the management device 100 and the control device 52. The management device 100 notifies the administrator B of the anomaly information. For example, the management device 100 displays an image indicating the anomaly information on the display device 104. This allows the management device 100 to make the administrator B aware of the anomaly information.

[0042] Furthermore, the acquisition unit 522 of the control device 52 acquires the abnormality information. The abnormality information is output to the change unit 526. The change unit 526 executes change control to change the monitoring parameters 530 based on the abnormality information. The change control is control for improving the detection accuracy of an abnormality or an abnormality sign of the second wind power generation device 22. The change unit 526 acquires the abnormal location of the first wind power generation device 21, the abnormal frequency band of the first wind power generation device 21, etc., which are included in the abnormality information.

[0043] As described above, the first wind power generation device 21 and the second wind power generation device 22 are related to each other. Therefore, when an abnormality occurs at a given location in the first wind power generation device, there is a tendency for the same type of abnormality to occur at the same location in the second wind power generation device 22 as the given location. In view of this tendency, the control device 52 of this embodiment has a change unit 526 that changes the monitoring parameters 530 of the control device 52 in order to detect an abnormality identical to the abnormality that occurred in the first wind power generation device at an early stage. The change of the monitoring parameters 530 will be described later.

[0044] The acquisition unit 522 acquires N second physical quantities from the second sensor group S2n. The N second physical quantities from the second sensor group S2n are output to the detection unit 524. The detection unit 524 detects an abnormality in the second wind turbine generator 22 based on the N second physical quantities and the monitoring parameters 530.

[0045] Here, when the monitoring parameters 530 are changed by the variation control, the detection unit 524 detects an abnormality in the second wind power generation device 22 based on the N physical quantities and the changed monitoring parameters 530. On the other hand, when the monitoring parameters 530 are not changed, the detection unit 524 detects an abnormality in the second wind power generation device 22 based on the N physical quantities and the default monitoring parameters 530.

[0046] When the detection unit 524 detects an abnormality, the detection unit 524 generates abnormality information indicating the abnormality. Then, the detection unit 524 transmits the abnormality information to the management device 100.

[0047] [Change monitoring parameters] Fig. 3 is a diagram for explaining a change in the monitoring parameters 530. Fig. 3(A) is a diagram showing the monitoring parameters 530 before the change, and Fig. 3(B) is a diagram showing the monitoring parameters 530 after the change.

[0048] In this embodiment, the control device 51 starts monitoring the first wind turbine generator 21 when the amount of power generated by the first wind turbine generator 21 in a predetermined period (first predetermined period) exceeds a first threshold value Th1. The control device 52 starts monitoring the second wind turbine generator 22 when the amount of power generated by the second wind turbine generator 22 in the above-mentioned first predetermined period exceeds a second threshold value Th2. The monitoring parameter 530 is the second threshold value Th2. As shown in Fig. 3(A), the second threshold value Th2 before the variation control is the same value as the first threshold value Th1.

[0049] Next, the reason for starting monitoring of the wind turbine generator when the amount of power generation exceeds the thresholds (first threshold Th1, second threshold Th2) will be described. For example, a configuration may be considered in which the state of the wind turbine generator is monitored even when the amount of power generation is low. However, with such a configuration, even if there is an abnormality in a component of the wind turbine generator (such as a bearing), the detection value by the sensor corresponding to the component may not be accurate. In such a case, the control device may not be able to detect the abnormality.

[0050] Therefore, in this embodiment, the control device does not monitor the state of the wind turbine generator when the amount of power generation is small, and starts monitoring the state of the wind turbine generator when the amount of power generation exceeds a threshold value, so that the control device can appropriately detect an abnormality in the wind turbine generator.

[0051] Then, as shown in Fig. 3(B), the change unit 526 changes the second threshold Th2 to a value smaller than the first threshold Th1. Thus, in this embodiment, the monitoring parameter to be changed is the second threshold Th2 used by the control device 52. By the change unit 526 changing the second threshold Th2, it is possible to start monitoring the second wind power generation device 22 at an earlier timing compared to before the change of the second threshold Th2. Therefore, the control device 52 can detect an abnormality in the second wind power generation device 22 at an earlier timing.

[0052] [Processing flow of the control device 51 and the control device 52] Fig. 4 is a flowchart showing the flow of main processes of the control device 51 of the first wind turbine generator 21 and the control device 52 of the second wind turbine generator 22. The control device 51 and the control device 52 execute the process of Fig. 4 at specific intervals (for example, every second).

[0053] First, in step S2, the control device 51 determines whether or not an abnormality has occurred in the first wind turbine generator 21 by monitoring the first wind turbine generator 21. If an abnormality has not occurred in the first wind turbine generator 21 (NO in step S2), the process ends. On the other hand, if an abnormality has occurred in the first wind turbine generator 21 (YES in step S2), the control device 51 generates abnormality information regarding the abnormality and transmits it to the control device 52 in step S4.

[0054] In step S12, the control device 52 judges whether or not abnormality information has been acquired. If the control device 52 has acquired abnormality information (YES in step S12), in step S14, the control device 52 executes a predetermined control for suppressing the abnormality of the second wind turbine generator 22.

[0055] As described above, the first wind turbine generator 21 and the second wind turbine generator 22 are associated with each other. Therefore, there is a tendency for the same abnormality that occurs in the first wind turbine generator to also occur in the second wind turbine generator 22. In view of this tendency, the control device 52 of this embodiment executes a predetermined control for suppressing the abnormality in the second wind turbine generator 22 based on the abnormality information related to the abnormality in the first wind turbine generator 21. Therefore, the control device 52 can suppress the occurrence of an abnormality in the second wind turbine generator 22.

[0056] The above-mentioned predetermined control includes variation control. The variation control is control for varying the monitoring parameters 530 (see FIG. 2) used for monitoring the second wind power generation device 22 so as to suppress the occurrence of an abnormality in the second wind power generation device 22. In this way, the control device 51 changes the monitoring parameters 530 (see FIG. 2) used for monitoring the second wind power generation device 22 based on the abnormality information of the first wind power generation device 21. Therefore, the control device 51 can appropriately suppress the occurrence of an abnormality in the second wind power generation device 22.

[0057] 3, the change control in this embodiment is a control for changing the second threshold value Th2 used by the control device 52 to a value smaller than the first threshold value Th1. Therefore, the control device 52 can advance the timing for monitoring the second wind turbine generator 22. Therefore, the control device 52 can advance the timing for starting monitoring the second wind turbine generator 22, and therefore can detect an abnormality in the second wind turbine generator 22 at an early stage.

[0058] <Second embodiment> The change control in the above-described first embodiment has been described as a configuration in which the second threshold value Th2 as the monitoring parameter 530 is made smaller than the first threshold value Th1. In the second embodiment, change controls (first change control to third change control) in which other monitoring parameters 530 are changed will be described.

[0059] [First change control] 5 is a diagram for explaining the first variation control. In an embodiment in which this first variation control is adopted, the control device 51 executes a monitoring process of the first wind power generation device 21 over a predetermined monitoring period S. Furthermore, the control device 51 executes this monitoring process for each first period T1. The monitoring period S is, for example, 40 seconds, and the first period T1 is a monitoring process interval of the first wind power generation device 21, for example, 2 hours.

[0060] The control device 52 also executes a monitoring process of the second wind power generation device 22 over a predetermined monitoring period S. Furthermore, the control device 52 executes this monitoring process for each second period T2. The monitoring period S is, for example, 40 seconds. The second period T2 is a monitoring process interval for the second wind power generation device 22. As shown in FIG. 5(A), the second period T2 before the variation control is the same value as the first period T1, which is 2 hours.

[0061] As the variation control, the change unit 526 changes the second period T2 to a value shorter than the first period T1, as shown in Fig. 5(B) In this manner, in the embodiment in which the first variation control is adopted, the monitoring parameter 530 to be changed is the second period T2 used by the control device 52.

[0062] By the change unit 526 changing the second period T2, it is possible to increase the frequency of execution of the monitoring process of the second wind power generation device 22 compared to before the change of the second period T2. Therefore, the control device 52 can improve the accuracy of detecting an abnormality in the second wind power generation device 22, and can detect an abnormality in the second wind power generation device 22 at an early stage.

[0063] [Secondary Change Control] 6 is a diagram for explaining the second variation control. In an embodiment in which the second variation control is adopted, the abnormality information includes an abnormal physical quantity that is a cause of an abnormal location in the wind power generation device. Here, a temperature sensor that detects the temperature at a predetermined temperature detection location of the first wind power generation device 21 is installed as a sensor S1n. Also, a temperature sensor that detects the temperature at the temperature detection location is installed as a sensor S2n at the same temperature detection location as the above-mentioned temperature detection location of the second wind power generation device 22.

[0064] The control device 51 executes a monitoring process for the first wind power generation device 21 by comparing the physical quantity from the sensor S1n with a third threshold value Th3 corresponding to the physical quantity. One of a range larger than the third threshold value Th3 (in this embodiment, a range equal to or larger than the third threshold value Th3) and a range smaller than the third threshold value Th3 is an undetected range in which an abnormality in the first wind power generation device 21 is not detected, and the other is a detection range in which an abnormality in the first wind power generation device 21 is detected. In this embodiment, the range larger than the third threshold value Th3 is the detection range, and the range smaller than the third threshold value Th3 is the undetected range. In the example of FIG. 6, the third threshold value Th3 is the temperature threshold value of the first wind power generation device 21, and the fourth threshold value Th4 is the temperature threshold value of the second wind power generation device 22.

[0065] That is, when the temperature is equal to or higher than the third threshold value Th3, the control device 51 determines that the location corresponding to the temperature sensor that detected the temperature is abnormal. On the other hand, when the temperature is lower than the third threshold value Th3, the control device 51 determines that the location corresponding to the temperature sensor that detected the temperature is normal.

[0066] The control device 52 also performs monitoring processing of the second wind power generation device 22 by comparing the physical quantity from the sensor S2n with a fourth threshold value Th4 corresponding to the physical quantity. One of the range greater than the fourth threshold value Th4 (in this embodiment, the range equal to or greater than the fourth threshold value Th4) and the range smaller than the fourth threshold value Th4 is an undetected range in which no abnormality of the second wind power generation device 22 is detected, and the other is a detection range in which an abnormality of the second wind power generation device 22 is detected. In this embodiment, the range greater than the fourth threshold value Th4 is the detection range, and the range smaller than the fourth threshold value Th4 is the undetected range. That is, when the temperature is equal to or greater than the fourth threshold value Th4, the control device 52 determines that the location corresponding to the temperature sensor that detected the temperature is abnormal. On the other hand, when the temperature is smaller than the fourth threshold value Th4, the control device 52 determines that the location corresponding to the temperature sensor that detected the temperature is normal.

[0067] As shown in FIG. 6, the detection range is also called an abnormal range, and the undetected range is also called a normal range.

[0068] 6(A), the fourth threshold value Th4 before the variation control is the same as the third threshold value Th3. When the control device 51 determines that the temperature from the temperature sensor is equal to or higher than the third threshold value Th3, it outputs the sensor ID of the temperature sensor as abnormality information to the control device 52. The control device 52 can identify the temperature abnormality location of the first wind power generation device 21 by this sensor ID.

[0069] 6(B), the change unit 526 of the control device 52 changes the fourth threshold value Th4 corresponding to the physical quantity (temperature) detected by the sensor ID so that it falls within the undetected range of the third threshold value Th3. In this manner, in the embodiment in which the second change control is adopted, the monitoring parameter 530 to be changed is the fourth threshold value Th4 used by the control device 52.

[0070] By changing the fourth threshold value Th4 by the change unit 526, it is possible to detect an abnormality in the second wind power generation device 22 in advance, as compared to before the fourth threshold value Th4 was changed. In other words, by changing the fourth threshold value Th4 by the change unit 526, it is possible to detect a sign of an abnormality in the second wind power generation device 22. Therefore, the control device 52 can detect an abnormality in the second wind power generation device 22 at an early stage.

[0071] [Third Change Control] 7 is a diagram for explaining the third variation control. In an embodiment in which the third variation control is adopted, the abnormality information includes an abnormal frequency band that is a cause of an abnormal location in the first wind power generation device 21. The abnormal frequency band is a frequency band in the first frequency spectrum whose intensity is abnormal (whose intensity exceeds a threshold value). Hereinafter, the frequency spectrum generated by the control device 51 is also referred to as the "first frequency spectrum," and the frequency spectrum generated by the control device 52 is also referred to as the "second frequency spectrum."

[0072] Here, s (where 1≦s≦N) vibration sensors that detect the vibration frequency of at least one vibration detection location are installed as sensors S1n at at least one vibration detection location of the first wind turbine generator 21. Also, s vibration sensors are installed as sensors S2n at the same location as the at least one vibration detection location of the second wind turbine generator 22. Note that the s vibration sensors detect vibrations in different frequency bands at the same vibration detection location, for example.

[0073] The control device 51 generates a first frequency spectrum for each component of the first wind turbine generator 21 based on vibration values ​​(physical quantities) from s vibration sensors among the first sensors S1n. This first frequency spectrum indicates the intensity of each first frequency band F1. The control device 51 executes a monitoring process for the first wind turbine generator 21 using the first frequency spectrum.

[0074] When the intensity in each frequency band of the first frequency spectrum exceeds a threshold (peaks), the control device 51 identifies the frequency band corresponding to the intensity (abnormal frequency band) and the part corresponding to the above-mentioned natural frequency band as being abnormal.

[0075] Furthermore, the control device 52 generates a second frequency spectrum for each component of the second wind power generation device 22 based on vibration values ​​(physical quantities) from the s vibration sensors of the second sensor group S2n. This second frequency spectrum indicates the intensity of each second frequency band F2. The control device 52 executes a monitoring process for the second wind power generation device 22 using the second frequency spectrum.

[0076] When the intensity in each frequency band of the second frequency spectrum exceeds a threshold (peaks), the control device 52 identifies the frequency band corresponding to the intensity (abnormal frequency band) and the part corresponding to the above-mentioned natural frequency band as being abnormal.

[0077] As shown in Fig. 7(A), the second frequency band F2 before the variation control is the same value as the first frequency band F1. When the control device 51 determines that an abnormal frequency band exists in the first frequency spectrum of the first wind power generation device 21, the control device 51 outputs the abnormal frequency band and the sensor ID of the vibration sensor corresponding to the abnormal frequency band as abnormality information to the control device 52. In the example of Fig. 7(A), the frequency band with the peak Pa is the abnormal frequency band Fa.

[0078] As shown in Fig. 7(B), the change unit 526 of the control device 52 changes the second frequency band F2 in the band Fx including the abnormal frequency band transmitted from the control device 51 to a band narrower than the first frequency band F1. In this manner, in an embodiment in which the third change control is adopted, the monitoring parameter to be changed is the second frequency band F2 included in the band Fx used by the control device 52. On the other hand, the change unit 526 does not change the second frequency band F2 in bands other than the band Fx. In the example of Fig. 7(B), the frequency band with the peak Pb becomes the abnormal frequency band Fb.

[0079] In this way, the control device 52 can improve the resolution in the frequency spectrum by changing the second frequency band F2 to a band narrower than the first frequency band F1.

[0080] Also, as shown in FIG. 7(A), before the second frequency band F2 is changed, the abnormal frequency band is Fa. However, as shown in FIG. 7(B), after the second frequency band F2 is changed, Fb (≠Fa) is detected as an abnormal frequency band more accurate than the abnormal frequency band in FIG. 7(A). Therefore, the control device 52 can detect a more accurate abnormal frequency band by changing the second frequency band F2. Therefore, the control device 52 can detect an abnormality in the second wind power generation device 22 early. Furthermore, although the amount of calculation increases by narrowing the second frequency band F2, the control device 52 does not change the second frequency band F2 in a band other than the band Fx. Therefore, the control device 52 can suppress an excessive increase in the amount of calculation.

[0081] In the example of FIG. 7, a configuration has been described in which an abnormality in the first wind power generation device 21 and the second wind power generation device 22 is detected based on the "frequency band (abnormal frequency band). However, a configuration may be adopted in which an abnormality in the first wind power generation device 21 and the second wind power generation device 22 is detected based on the "frequency (abnormal frequency)" which is a pinpoint value.

[0082] <Third embodiment> The first and second embodiments have been described mainly in terms of the configuration in which the control device 52 changes the monitoring parameters 530. The control device 52 of the third embodiment returns the monitoring parameters 530, which have been changed by the change control of the first and second embodiments, to the state before the change when a predetermined condition is met.

[0083] In this way, the control device 52 returns the changed monitoring parameters 530, and can monitor the second wind turbine generator 22 using the monitoring parameters 530 before the change (i.e., the default monitoring parameters 530). That is, the control device 52 can monitor the second wind turbine generator 22 using, for example, the same monitoring parameters as those of the first wind turbine generator 21.

[0084] Fig. 8 is a diagram for explaining the predetermined conditions. In the example of Fig. 8, a first condition to a fourth condition are shown as the predetermined conditions.

[0085] The first condition is that, as a result of monitoring the second wind power generation device 22 by the control device 52 for a predetermined period after changing the monitoring parameters 530, no abnormality or abnormality sign is detected in the second wind power generation device 22. The predetermined period corresponds to the "second predetermined period" in the present disclosure, and is, for example, six months.

[0086] According to such a configuration, if no abnormality or abnormality sign of the second wind power generating device 22 is detected within a predetermined period from when the monitoring parameters 530 of the second wind power generating device 22 are changed, it is assumed that there is no particular problem even if the changed monitoring parameters 530 are returned. Therefore, the control device 52 can appropriately return the monitoring parameters 530.

[0087] The second condition is that after the monitoring parameters are changed, the control device 52 receives an end signal indicating that maintenance of the second wind power generation device 22 has been completed. Here, for example, a worker performing maintenance on the second wind power generation device 22 has a maintenance terminal (not shown). When the maintenance is completed, the worker performs an end operation on the maintenance terminal to indicate that maintenance has been completed.

[0088] When the end operation is input, the maintenance terminal transmits an end signal directly or via another device to the control device 52. When the control device 52 receives the end signal, the above-mentioned second condition is satisfied.

[0089] According to such a configuration, when the maintenance of the other power generation device is completed, it is assumed that there is no particular problem even if the changed monitoring parameters 530 are returned to their original state. Therefore, the control device 52 can appropriately return the monitoring parameters to their original state.

[0090] The third condition is that the control device 52 receives a signal indicating that a predetermined operation has been performed by a user. Here, the predetermined operation may be performed on any device, and the devices include, for example, at least one of the management device 100, the control device 51, the control device 52, and the user terminal 70. The device on which the predetermined operation has been performed transmits an operation signal indicating that the predetermined operation has been performed to the control device 52 via another device or directly. When the control device 52 receives the operation signal, the above-mentioned third condition is satisfied.

[0091] According to such a configuration, the control device 52 returns the changed monitoring parameters 530 when a predetermined operation is performed by the user, so that the monitoring parameters can be returned at a timing desired by the user.

[0092] The fourth condition is that the amount of power generated by the second wind power generation device 22 for a predetermined period (for example, the above-mentioned second predetermined period) is lower than the amount of power generated in the predetermined period before the variation control is executed. In general, even if an abnormality or a sign of an abnormality is expected in the second wind power generation device 22, if the amount of power generated by the second wind power generation device 22 for a predetermined period is lower than before the variation control is executed, an abnormality in the second wind power generation device 22 is less likely to occur. Thus, if the amount of power generated by the second wind power generation device 22 for a predetermined period after the monitoring parameters of the second wind power generation device 22 are changed is lower than before the variation control is executed, the above-mentioned fourth condition is met.

[0093] According to such a configuration, it is assumed that there will be no particular problem even if the control device 52 returns the changed monitoring parameters 530 when the amount of power generated by the second wind power generation device 22 for a predetermined period of time becomes lower than before the variation control was executed. Therefore, the control device 52 can appropriately return the monitoring parameters 530.

[0094] <Fourth embodiment> In the above-described first to third embodiments, the predetermined control is the variation control, whereas in the fourth embodiment, the predetermined control is another type of control.

[0095] The predetermined control may include, for example, control to stop the operation of the second wind power generation device 22. As shown in Fig. 2, when the detection unit 514 of the control device 51 detects an abnormality, it outputs a stop signal (in parentheses in Fig. 2) to the control device 52. The stop signal is a signal for stopping the operation of the second wind power generation device 22.

[0096] When the control device 52 receives the stop signal, it stops the operation of the second wind power generation device 22. With this configuration, the control device 52 can stop the operation of the second wind power generation device 22 where there is a high possibility of an abnormality occurring. Therefore, it is possible to prevent a fatal abnormality from occurring in the second wind power generation device 22 where there is a high possibility of an abnormality occurring.

[0097] The stop signal may be replaced by a suppression signal. The suppression signal is a signal for suppressing the operation of the second wind power generation device 22. The suppression of the operation of the second wind power generation device 22 is, for example, a control to change the direction of the wind turbine of the second wind power generation device 22. With this configuration, the control device 52 can suppress the operation of the second wind power generation device 22 that is highly likely to have an abnormality. Therefore, the control device 52 can extend the life of the second wind power generation device 22 that is highly likely to have an abnormality.

[0098] The predetermined control also includes control for notifying the owner (user) of the second wind power generation device 22 of possibility information indicating that an abnormality or an abnormality symptom may occur in the second wind power generation device 22. When the detection unit 514 of the control device 51 detects an abnormality in the first wind power generation device 21, it outputs the abnormality information to the control device 52. The control device 52 identifies the abnormal location of the first wind power generation device 21 indicated by the abnormality information. It generates possibility information indicating that there is a high possibility that an abnormality will occur in the same location of the second wind power generation device 22 as the abnormal location of the first wind power generation device 21. The control device 52 also generates a maintenance method capable of repairing the abnormal location.

[0099] Furthermore, the control device 52 and the other control device (control device 51) hold a user table. The user table is a table in which wind power generation device IDs are associated with user terminal IDs. FIG. 9 is an example of a user table. In the example of FIG. 9, the reference symbols (21, 22, etc.) of the wind power generation devices are defined as wind power generation device IDs. In the example of FIG. 9, the first wind power generation device 21 is associated with the user terminal 70A, and the second wind power generation device 22 is associated with the user terminal 70B.

[0100] When the control device 52 generates the possibility information, it transmits the possibility information to the user terminal 70B corresponding to the second wind turbine power generation device 22. Then, the control device 52 causes the user terminal 70 of the user of the second wind turbine power generation device 22 to display the possibility information.

[0101] Fig. 10 is an example of a screen displaying possibility information 72 on the user terminal 70. The possibility information 72 in the example of Fig. 10 is a text image saying "An abnormality is predicted to occur in the bearing of the second wind power generation device. Please carry out maintenance called 'AA'."

[0102] According to such a configuration, the control device 52 can make the user of the second wind power generation device 22 aware of the possibility of an abnormality or a sign of an abnormality occurring in the second wind power generation device 22. Therefore, the user of the second wind power generation device 22 can prevent the occurrence of an abnormality in the second wind power generation device 22 by performing simple maintenance on the second wind power generation device 22.

[0103] <Fifth embodiment> In the fifth embodiment, even if the control device 52 changes the monitoring parameters 530 of the second wind power generation device 22, if no abnormality or signs of abnormality are detected in the second wind power generation device 22 for a certain period of time, the control device 52 may be configured to output non-detection information indicating that no abnormality or signs of abnormality have been detected in the second wind power generation device 22.

[0104] For example, the display device 104 of the management device 100 displays the undetected information. Fig. 11 is a diagram showing an example of the undetected information 114 displayed on the display device 104. In the example of Fig. 11, the undetected information 114 is a text image stating "The monitoring parameters of the second wind power generation device have been changed, but no abnormality has been detected in the second wind power generation device."

[0105] According to this configuration, the control device 52 can make the administrator B of the management device 100 or the user of the second wind power generation device 22, etc., aware that no abnormality or signs of abnormality have been detected in the second wind power generation device 22 after the change control has been executed.

[0106] Sixth embodiment 1, a configuration has been described in which each power generating unit includes a control device (such as the control device 51 and the control device 52). However, the management device 100 may also be configured to include a control device.

[0107] FIG. 12 is a diagram showing a configuration example of a management system 10A in which such a configuration is adopted. In the example of FIG. 12, the management device 100 includes a control device 50. Here, in this embodiment, the abnormality information is information used by the control device 50 of the management device 100 to identify an abnormal location or an abnormality sign location of the first wind power generation device 21. That is, M wind power generation devices such as the first wind power generation device 21 transmit physical quantities detected by sensors (such as the first sensor group S1n) installed in the wind power generation devices as abnormality information to the control device 50 of the management device 100. That is, "information used by the management device 100 to identify an abnormal location or an abnormality sign location of the first wind power generation device 21" is the physical quantity detected by the sensor.

[0108] The control device 50 monitors each wind power generation device based on the physical quantity (anomaly information) acquired from each collection device. Then, when the control device 50 detects an abnormality in the first wind power generation device 21, for example, it executes the above-mentioned predetermined control. For example, the control device 50 executes a change control for changing a monitoring parameter of another wind power generation device (for example, the second wind power generation device 22) as the predetermined control. Specifically, the control device 50 transmits a command signal for causing the other wind power generation device to execute the change control. When the other wind power generation device acquires the command signal, it changes the monitoring parameter of the other wind power generation device itself.

[0109] As a modification of the sixth embodiment, monitoring of each wind turbine generator may be performed by a control device installed in each wind turbine generator. When the control device detects an abnormality in a wind turbine generator, it transmits abnormality information indicating the abnormality location or abnormality sign location to the control device 50. The control device 50 executes a predetermined control based on the abnormality information.

[0110] Seventh embodiment In the seventh embodiment, an example in which change control of monitoring parameters is executed using AI (Artificial Intelligence) is described. FIG. 13 is a functional block diagram of a control device 52 according to this embodiment. As shown in FIG. 13, the control device 52 has an estimation unit 1102 in addition to an acquisition unit 522 and a change unit 526. In addition to the monitoring parameters 530, the storage unit 528 stores a trained model 121. The trained model 121 includes a neural network 1211 and parameters 1212. The parameters 1212 are composed of weighting coefficients and judgment values. The trained model 121 is trained by supervised learning or unsupervised learning, etc.

[0111] The acquisition unit 522 acquires the abnormality information and the maintenance result. The abnormality information is acquired, for example, from the control device 51. The maintenance result is acquired from the operator terminal 60, which will be described later.

[0112] The estimation unit 1102 estimates monitoring parameters based on the input data input from the acquisition unit 522 and the trained model 121 including the neural network 1211. The estimated monitoring parameters correspond to the monitoring parameters changed by the above-mentioned change control. The estimated monitoring parameters are output to the change unit 526. The change unit 526 changes the monitoring parameters 530 stored in the storage unit 528 to the estimated monitoring parameters.

[0113] 13, the control device 52 acquires anomaly information from the control device 51. Then, the control device 52 estimates monitoring parameters by applying the anomaly information to the trained model 121. In other words, the control device 52 executes the above-mentioned change control by applying the anomaly information to the trained model 121.

[0114] Next, the maintenance result will be described. The maintenance result is information input by the worker C to the worker terminal 60. The worker C is the person who performed maintenance on the wind power generation device in which an abnormality occurred (here, the first wind power generation device 21). The maintenance includes inspection of the wind power generation device and repair of the wind power generation device. The worker terminal 60 is a terminal (for example, a mobile terminal) held by the worker C.

[0115] Fig. 14 shows an example of a screen displayed on the worker terminal 60. Fig. 14(A) shows an example of an input screen 401, and Fig. 14(B) shows an example of a sent screen 402. For example, worker C or the like performs a predetermined operation on the worker terminal 60, which causes the worker terminal 60 to display the input screen 401. In this embodiment, the display control of the input screen 401 is executed under the control of the management device 100. However, as a modified example, the worker terminal 60 may execute the display control of the input screen 401 under the control of the worker terminal 60 itself.

[0116] An image without abnormality 411, an image with abnormality 412, an input area 414, and a send button 415 are displayed on the input screen 401. The image without abnormality 411, the image with abnormality 412, and the input area 414 are images for inputting the maintenance results by the worker C. In the example of Fig. 14, the worker C can specify either the image without abnormality 411 or the image with abnormality 412 by using a radio button.

[0117] For example, a worker C is dispatched to the first wind power generation device 21 for maintenance and inspects a portion of the first wind power generation device 21 that is determined to be abnormal. However, when the worker C inspects the portion determined to be abnormal, there are cases where no abnormality actually occurs in the portion. In this case, the worker C designates an image 411 showing no abnormality and operates the send button 415.

[0118] Furthermore, if operator C inspects the portion of the first wind power generation device 21 that is determined to be abnormal and determines that an abnormality has occurred, operator C designates an abnormality image 412. Furthermore, operator C inputs the details of the emergency maintenance (such as replacing a bearing) in an input area 414. Then operator C operates a send button 415.

[0119] When the send button 415 is operated, the worker terminal 60 sends the ID of the wind power generation device to be maintained and the maintenance results entered on the input screen 401 to the management device 100. At the same time, the worker terminal 60 displays the sent screen of Fig. 14(B). By displaying this sent screen, the worker terminal 60 can recognize that the maintenance results have been sent to the management device 100.

[0120] 14, the management device 100 causes the worker terminal 60 to maintain the display of the input screen 401 until the maintenance result is input on the input screen 401. In other words, the worker terminal 60 displays the transmitted screen 402 only when the maintenance result is input on the input screen 401.

[0121] There is a case where the worker C inspects a portion of the first wind power generating device 21 that is determined to be abnormal, and finds that no abnormality has occurred at that portion. In this case, if the monitoring parameters 530 have not been changed, even if an abnormality has been identified in the second wind power generating device 22, there is a high possibility that the result of the maintenance (inspection) for the abnormality will be that no abnormality has actually occurred.

[0122] Therefore, when the maintenance result shows that no abnormality has occurred in the first wind power generating device 21 (when the image without abnormality 411 is specified) or when the maintenance content is small-scale maintenance, the estimation unit 1102 estimates a monitoring parameter that reduces the accuracy of abnormality detection. Then, the change unit 526 changes the monitoring parameter 530 to the estimated monitoring parameter (the monitoring parameter with reduced accuracy of abnormality detection). The process of changing the monitoring parameter 530 to the estimated monitoring parameter includes, for example, a process of increasing the second threshold value Th2 in FIG. 3, a process of lengthening the second period T2 in FIG. 5, a process of making the fourth threshold value Th4 in FIG. 6 belong to the abnormality range, and a process of widening the second frequency band in FIG. 7. By such control, the amount of calculation for abnormality detection can be reduced.

[0123] Generally, even if the result of maintenance (inspection) of a portion of the first wind power generating device 21 where an abnormality is identified indicates that an abnormality has occurred and the abnormality is repaired by maintenance (repair), there is a high possibility that an abnormality will occur in the same portion of the second wind power generating device 22. Therefore, when the result of maintenance indicates that an abnormality has occurred in the first wind power generating device 21 (when the image with abnormality 412 is specified) or when the maintenance content is large-scale maintenance, the estimation unit 1102 estimates monitoring parameters that improve the accuracy of abnormality detection. Then, the change unit 526 changes the monitoring parameters 530 to the estimated monitoring parameters (monitoring parameters with improved accuracy of abnormality detection). The process of changing the monitoring parameters 530 to the estimated monitoring parameters includes, for example, a process of decreasing the second threshold value Th2 in FIG. 3, a process of shortening the second period T2 in FIG. 5, a process of making the fourth threshold value Th4 in FIG. 6 belong to the normal range, and a process of narrowing the second frequency band in FIG. 7. By such control, early detection of an abnormality in the second wind power generating device 22 can be realized.

[0124] [Variations] (1) In the above embodiment, an example has been described in which M wind turbine generators constitute the same wind farm. However, a wind farm may be formed by wind turbine generators excluding at least one of the M wind turbine generators. For example, the first wind turbine generator 21 and the second wind turbine generator 22 may constitute different wind farms.

[0125] (2) In the above embodiment, the power generation device is a wind power generation device. However, the power generation device may be another type of power generation device. The other power generation device may be, for example, a hydroelectric power generation device, a solar power generation device, or the like.

[0126] [Note] (Supplementary Note 1) A control device comprising a calculation device and an interface configured to acquire anomaly information which is information indicating an abnormal location or anomaly warning location of a power generation device or information used by the calculation device to identify an abnormal location or anomaly warning location of the power generation device, and the calculation device executes a predetermined control for suppressing anomalies in other power generation devices related to the power generation device based on the anomaly information.

[0127] According to this configuration, it is possible to execute a predetermined control for suppressing an abnormality in the other power generating units based on the abnormality information of the power generating unit, and therefore it is possible to suppress an abnormality in the other power generating units.

[0128] (Supplementary Note 2) The control device described in Supplementary Note 1, wherein the power generation device is provided with at least one first sensor that detects a physical quantity related to the operation of the power generation device, and the other power generation devices are provided with at least one second sensor that detects a physical quantity related to the operation of the other power generation devices, the types of physical quantities detected by the at least one first sensor are the same as the types of physical quantities detected by the at least one second sensor, the locations of the at least one first sensor in the power generation device are the same as the locations of the at least one second sensor in the other power generation devices, the specified control includes change control that changes monitoring parameters used to monitor the other power generation devices, and the calculation device detects abnormalities or signs of abnormality in the other power generation devices based on the physical quantity detected by the at least one second sensor and the monitoring parameters changed by the change control.

[0129] According to this configuration, the monitoring parameters used for monitoring the other power generating units are changed so as to suppress abnormalities in the other power generating units, so that abnormalities in the other power generating units can be detected at an early stage.

[0130] (Appendix 3) The control device described in Appendix 2, wherein the control device starts monitoring a power generation device when the amount of power generation by the power generation device in a first predetermined period is greater than a first threshold, and starts monitoring the other power generation devices when the amount of power generation by the other power generation devices in the first predetermined period is greater than a second threshold, the monitoring parameters include a second threshold, and the change control includes control to change the second threshold to a value smaller than the first threshold.

[0131] According to this configuration, the timing for starting monitoring of the other power generating units can be advanced, so that abnormalities in the other power generating units can be detected early, thereby improving the accuracy of detecting abnormalities in the other power generating units.

[0132] (Supplementary Note 4) A control device as described in Supplementary Note 2 or Supplementary Note 3, wherein the control device performs monitoring of a power generation device for every first period and monitors other power generation devices for every second period, the monitoring parameters include the second period, and the change control includes control to change the second period to a period shorter than the first period.

[0133] According to this configuration, the frequency of monitoring the other power generating units is increased, so that abnormalities in the other power generating units can be found early, and therefore the accuracy of detecting abnormalities in the other power generating units can be improved.

[0134] (Supplementary Note 5) The control device monitors the power generation device using an intensity of each first frequency band in a first frequency spectrum of the power generation device, generated based on a physical quantity detected by at least one first sensor, and monitors the other power generation devices using an intensity of each second frequency band in a second frequency spectrum of the other power generation device, generated based on a physical quantity detected by at least one second sensor, the abnormality information includes an abnormal frequency band in the first frequency spectrum that is a cause of an abnormal location or an abnormality precursor location, the monitoring parameters include a second frequency band, and the change control includes control to change the second frequency band in a band including the abnormal frequency band to a band narrower than the first frequency band.

[0135] According to such a configuration, it is possible to improve the resolution of the intensity in the frequency spectrum used for monitoring the other power generating units, so that an abnormality in the other power generating units can be found at an early stage.

[0136] (Supplementary Note 6) A control device described in any one of Supplementary Notes 2 to 5, wherein the control device monitors the power generation device based on a physical quantity detected by at least one first sensor and a third threshold value, and monitors other power generation devices based on a physical quantity detected by at least one second sensor and a fourth threshold value, wherein either a range greater than the third threshold value or a range smaller than the third threshold value is an undetected range in which no abnormality in the power generation device is detected, the monitoring parameters include a fourth threshold value, and the change control includes control to change the fourth threshold value corresponding to the abnormal location or the abnormality precursor location so that it falls within the undetected range.

[0137] According to this configuration, the threshold value used for monitoring the other power generating devices is changed to the undetectable range of the third threshold value, so that an abnormality in the other power generating devices can be found early, thereby improving the accuracy of detecting an abnormality in the other power generating devices.

[0138] (Supplementary Note 7) A control device as described in any one of Supplementary Notes 2 to 6, wherein the calculation device outputs information indicating that no abnormality or abnormality signs have been detected in the other power generation devices if no abnormality or abnormality signs have been detected in the other power generation devices after the variation control has been executed.

[0139] With this configuration, it is possible to make the manager or owner of the power generation equipment aware that no abnormalities or signs of abnormality have been detected in other power generation equipment after variation control has been executed.

[0140] (Supplementary Note 8) The control device according to any one of Supplementary Notes 2 to 7, wherein the calculation device restores the monitoring parameters changed by the variation control to their pre-change state when a predetermined condition is met after the variation control is executed.

[0141] According to such a configuration, since the changed monitoring parameters are restored, it is possible to monitor other power generating units using the monitoring parameters before the change.

[0142] (Supplementary Note 9) The control device according to Supplementary Note 8, wherein the predetermined condition includes a condition that, as a result of monitoring the other power generation device for a second predetermined period, no abnormality or a sign of abnormality is detected in the other power generation device.

[0143] According to this configuration, if no abnormality or abnormality sign is detected in the other power generation device as a result of monitoring the other power generation device over the second predetermined period, it is assumed that there is no particular problem even if the changed monitoring parameters are restored. Therefore, since the changed monitoring parameters are restored, the other power generation device can be monitored using the monitoring parameters before the change.

[0144] (Supplementary Note 10) The control device according to Supplementary Note 8 or Supplementary Note 9, wherein the predetermined condition includes a condition that the computing device receives a signal indicating that maintenance of another power generation device has been completed.

[0145] According to this configuration, when the maintenance of the other power generation device is completed, it is assumed that there is no particular problem even if the changed monitoring parameters are restored. Therefore, since the changed monitoring parameters are restored, the other power generation device can be monitored using the monitoring parameters before the change.

[0146] (Supplementary Note 11) The control device according to any one of Supplementary Note 8 to Supplementary Note 10, wherein the predetermined condition includes a condition that the arithmetic device receives a signal indicating that a predetermined operation has been executed by a user.

[0147] According to this configuration, the changed monitoring parameters are restored when a specified operation is performed by the user, so that monitoring of other power generation devices can be started using the monitoring parameters before the change at a timing desired by the user.

[0148] (Supplementary Note 12) The control device according to any one of Supplementary Note 8 to Supplementary Note 11, wherein the predetermined condition includes a condition that the amount of power generated by the other power generation device is lower than that before the variation control is executed.

[0149] In general, even if an abnormality is expected in another power generating unit, if the amount of power generated by the other power generating unit is low, the abnormality is unlikely to occur in the other power generating unit. Therefore, if the amount of power generated by the other power generating unit is low, the changed monitoring parameters are restored, so that the other power generating unit can be monitored using the monitoring parameters before the change.

[0150] (Supplementary Note 13) The control device according to any one of Supplementary Note 1 to Supplementary Note 12, wherein the predetermined control includes control for stopping or suppressing operation of another power generation device.

[0151] According to such a configuration, the operation of the other power generation units can be stopped or suppressed, and therefore abnormalities in the other power generation units can be suppressed.

[0152] (Supplementary Note 14) A control device as described in any one of Supplementary Note 1 to Supplementary Note 13, wherein the specified control includes control for notifying an owner of another power generation device that an abnormality or an abnormality precursor may occur in the other power generation device.

[0153] According to this configuration, the owner of the other power generation device can be made aware of the possibility of an abnormality or a sign of an abnormality occurring in the other power generation device, and the control device can therefore suppress abnormalities in the other power generation device by having the owner perform early maintenance.

[0154] (Supplementary Note 15) The control device according to any one of Supplementary Notes 1 to 14, wherein the power generation device and the other power generation device are wind power generation devices.

[0155] With this configuration, abnormalities in other wind turbine generators can be discovered early on.

[0156] (Supplementary Note 16) The control device according to Supplementary Note 15, wherein the power generation device and the other power generation device constitute a same wind farm.

[0157] According to such a configuration, since there is a high possibility that the same abnormality that has occurred in the power generation device will occur in the other wind turbine power generation device, the abnormality in the other power generation device can be found at an early stage.

[0158] (Supplementary Note 17) The control device according to Supplementary Note 1 to Supplementary Note 16, further comprising a memory for storing a trained model generated by machine learning, the interface for acquiring maintenance results of the power generation device from a predetermined terminal, and the calculation device for executing the change control by applying the abnormality information or the maintenance results to the trained model.

[0159] With this configuration, there is no need for an administrator or the like to change the monitoring parameters; the monitoring parameters are changed using a machine-learned model, allowing change control to be performed appropriately.

[0160] (Supplementary Note 18) A power generating unit comprising a power generating device and the control device according to any one of Supplementary Notes 1 to 17.

[0161] (Supplementary Note 19) A management system comprising: a power generation device; another power generation device; and a management device comprising the control device according to any one of Supplementary Notes 1 to 17.

[0162] (Supplementary Note 20) A control method comprising: acquiring anomaly information, which is information indicating an abnormal location or a location at which an abnormality is likely to occur in a power generation device or information used by a computing device to identify an abnormal location or a location at which an abnormality is likely to occur in the power generation device; and executing a predetermined control for suppressing an abnormality in another power generation device related to the power generation device based on the anomaly information.

[0163] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present disclosure is defined by the claims, not by the description of the embodiments described above, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0164] 10 Management system, 21 First wind power generation device, 22 Second wind power generation device, 31, 32 Collection device, 51, 52 Control device, 61 First power generation unit, 62 Second power generation unit, 70 User terminal, 72 Possible information, 100 Management device, 102 Input device, 104 Display device, 114 Undetected information, 201 Arithmetic device, 202 Memory, 203 Interface, 512, 522 Acquisition unit, 514, 524 Detection unit, 526 Change unit, 528 Storage unit, 530 Monitoring parameters.

Claims

1. an interface configured to obtain anomaly information of the power generation equipment; A computing device, the anomaly information is information indicating an anomaly location or an abnormality sign location of the power generation device, or information used by the computing device to identify an anomaly location or an abnormality sign location of the power generation device, The control device is configured to execute a predetermined control for suppressing an abnormality in another power generation device related to the power generation device based on the abnormality information.

2. At least one first sensor is disposed in the power generation device, each of the first sensors detecting a physical quantity related to the operation of the power generation device; At least one second sensor is disposed in each of the other power generation apparatuses, the second sensor detecting a physical quantity related to the operation of the other power generation apparatus; a type of a physical quantity detected by the at least one first sensor is the same as a type of a physical quantity detected by the at least one second sensor; an arrangement location of the at least one first sensor in the power generation device is the same as an arrangement location of the at least one second sensor in the other power generation device; the predetermined control includes a change control for changing a monitoring parameter used for monitoring the other power generation device, The control device according to claim 1 , wherein the calculation device detects an abnormality or a sign of an abnormality in the other power generation device based on a physical quantity detected by the at least one second sensor and a monitoring parameter changed by the variation control.

3. The control device includes: When an amount of power generated by the power generation device for a first predetermined period is greater than a first threshold, monitoring of the power generation device is started; when the amount of power generated by the other power generation device during the first predetermined period is greater than a second threshold, monitoring of the other power generation device is started; The monitoring parameters include the second threshold value; The control device according to claim 2 , wherein the change control includes control of changing the second threshold value to a value smaller than the first threshold value.

4. The control device includes: monitoring the power generation device for each first period; monitoring the other power generation device for each second period; the monitoring parameters include the second time period; The control device according to claim 2 or 3, wherein the change control includes control of changing the second period to a period shorter than the first period.

5. The control device includes: monitoring the power generation device using intensities of first frequency bands in a first frequency spectrum of the power generation device generated based on the physical quantities detected by the at least one first sensor; monitoring the other power generation device using an intensity of each second frequency band in a second frequency spectrum of the other power generation device, the intensity being generated based on the physical quantity detected by the at least one second sensor; The abnormality information includes an abnormal frequency band in the first frequency spectrum that is a cause of the abnormal location or the abnormality precursor location, the monitored parameters include the second frequency band; The control device according to claim 2 or 3, wherein the change control includes control of changing the second frequency band in a band including the abnormal frequency band to a band narrower than the first frequency band.

6. The control device includes: monitoring the power generation device based on a physical quantity detected by the at least one first sensor and a third threshold value; monitoring the other power generation device based on the physical quantity detected by the at least one second sensor and a fourth threshold value; any one of the range greater than the third threshold value and the range smaller than the third threshold value is an undetected range in which no abnormality is detected in the power generation device, The monitoring parameters include a fourth threshold value; The control device according to claim 2 or 3, wherein the change control includes control of changing a fourth threshold value corresponding to the abnormal portion or the abnormality precursor portion so that the fourth threshold value falls within the undetected range.

7. The control device according to claim 2 or claim 3, wherein the calculation device outputs information indicating that no abnormality or abnormality precursor has been detected in the other power generation device if no abnormality or abnormality precursor has been detected in the other power generation device after the variation control is executed.

8. 4. The control device according to claim 2, wherein the arithmetic device restores the monitoring parameters changed by the variation control to their pre-change states when a predetermined condition is met after the variation control is executed.

9. The control device according to any one of claims 1 to 3, wherein the predetermined control includes control for stopping or suppressing operation of the other power generation device.

10. The control device according to any one of claims 1 to 3, wherein the specified control includes control for notifying an owner of the other power generation device that there is a possibility of an abnormality or an abnormality precursor occurring in the other power generation device.

11. The control device according to any one of claims 1 to 3, wherein the power generation device and the other power generation device are wind power generation devices and constitute a same wind farm.

12. The control device further includes a memory that stores a learned model obtained by machine learning, The interface acquires a maintenance result of the power generation device from a predetermined terminal, The control device according to claim 2 or 3, wherein the arithmetic device executes the variation control by applying the abnormality information or the maintenance result to the trained model.

13. acquiring abnormality information which is information indicating an abnormal location or a location indicating an abnormality in a power generation device or information used by a computing device to identify an abnormal location or a location indicating an abnormality in the power generation device; and executing a predetermined control for suppressing an abnormality in another power generation device related to the power generation device based on the abnormality information.

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