Anomaly detection system and method for wind power generation equipment

Abstract

To provide an abnormality diagnosis system for a wind power generation device that can restrain a decrease in the operating rate of a wind power generation facility.SOLUTION: An abnormality diagnosis system for a wind power generation facility comprises: a measurement data acquisition unit constituted so as to acquire a measured wind speed, a measured output, and a measured value of a blade pitch angle of the wind power generation facility; a plan output acquisition unit constituted so as to acquire a plan output determined from a power curve and the measured wind speed of the wind power generation facility; a calculated wind speed calculation unit constituted so as to calculate a calculated wind speed on the basis of the measured output and the measured value of the blade pitch angle; and an abnormality diagnosis unit constituted so as to perform an abnormality diagnosis of the wind power generation facility on the basis of a comparison between the measured output and the plan output, and a comparison between the measured wind speed and the calculated wind speed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to an abnormality diagnosis system and an abnormality diagnosis method for a wind power generation facility.

Background Art

[0002] Patent Document 1 describes that in the case of strong winds where the wind speed value in a wind power generation facility is a predetermined value or more, cut-out control is performed to change the pitch angle of the wind turbine blade to stop power generation for device protection. Further, when the difference between the calculated calculated wind speed value based on the output of the wind power generation facility and the blade pitch angle and the measured value of the wind speed meter is a predetermined value or more, it is determined that an abnormality has occurred in the wind speed meter and cut-out control is performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a wind power generation facility, not only the wind speed meter but also the wind direction meter, the thermometer, the blade pitch mechanism, etc. may deteriorate or malfunction. Therefore, by diagnosing the state of the wind power generation facility more specifically, it becomes possible to operate in an appropriate operation mode that can suppress deterioration and failure according to the diagnosis result, and to repair appropriate parts at an appropriate timing, and it becomes possible to suppress a decrease in the operation rate of the wind power generation facility. In this regard, the abnormality diagnosis system for a wind power generation facility described in Patent Document 1 had room for improvement from the viewpoint of improving the operation rate of the wind power generation facility.

[0005] In view of the above circumstances, at least one embodiment of the present disclosure aims to provide an abnormality diagnosis system and an abnormality diagnosis method for a wind power generation device that can suppress a decrease in the operation rate of the wind power generation facility. [Means for solving the problem]

[0006] To achieve the above objectives, the abnormality diagnosis system for wind power generation equipment according to at least one embodiment of this disclosure is: A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired by the measurement data acquisition unit. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is a calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. It is equipped with.

[0007] To achieve the above objective, the method for diagnosing abnormalities in wind power generation equipment according to at least one embodiment of this disclosure is: A data acquisition step to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment. A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. It is equipped with. [Effects of the Invention]

[0008] According to at least one embodiment of this disclosure, an abnormality diagnosis system and an abnormality diagnosis method for a wind power generation system are provided that can suppress a decrease in the operating rate of the wind power generation system. [Brief explanation of the drawing]

[0009] [Figure 1] This diagram illustrates an example of the configuration of a wind power generation facility that is subject to abnormality diagnosis by the abnormality diagnosis system disclosed herein. [Figure 2] This figure shows an example of the hardware configuration of an abnormality diagnosis system 40 for performing abnormality diagnosis on the wind power generation equipment 1 shown in Figure 1. [Figure 3] Figure 2 is a block diagram illustrating the functional configuration of the anomaly diagnosis system 40. [Figure 4] Figures 2 and 3 show a portion of the abnormality diagnosis flow performed by the abnormality diagnosis system 40. [Figure 5] This figure shows a continuation of the abnormality diagnosis flow shown in Figure 4. [Figure 6] This figure shows a continuation of the abnormality diagnosis flow shown in Figure 5. [Figure 7] This figure shows a continuation of the abnormality diagnosis flow shown in Figure 6. [Figure 8] This figure shows a continuation of the abnormality diagnosis flow shown in Figure 7. [Figure 9] This figure shows an example of a power curve. [Figure 10] This figure shows an example of correlation information R1, which illustrates the relationship between generator output, blade pitch angle, and wind speed in wind power generation facility 1. [Figure 11] It is a diagram showing an example of the calculation content of the calculated wind speed calculation unit 46. [Figure 12] It is a diagram showing an example of the relationship between the average wind speed and the threshold value Itth of the turbulence intensity. [Figure 13] It is a diagram showing an example of the relationship between the wind speed and the target output for each of the normal operation mode and the output suppression mode. [Figure 14] It is a diagram showing an example of the relationship between the wind speed and the target output for each of the normal operation mode and the output optimization mode. [Figure 15] It is a diagram showing an example of the relationship between the wind speed and the target output for each of the normal operation mode and the load suppression mode. [Figure 16] It is a diagram showing an example of the relationship between the output of the generator 11 and the target blade pitch angle for each of the normal operation mode and the load suppression mode. [Figure 17] It is a diagram showing an example of the relationship between the wind speed and the target output for each of the normal operation mode and the output optimization load suppression mode. [Figure 18] It is a diagram showing an example of the relationship between the output of the generator 11 and the target blade pitch angle for each of the normal operation mode and the output optimization load suppression mode.

Embodiments for Carrying Out the Invention

[0010] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the invention thereto, but are merely illustrative examples. For example, expressions representing relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric", or "coaxial" not only strictly represent such arrangements, but also represent a state of being relatively displaced with tolerances or at an angle or distance that allows the same function to be obtained. For example, expressions such as "identical," "equal," and "homogeneous" that describe things being in an equal state not only describe a state of being strictly equal, but also describe a state in which there is a tolerance or a difference that is sufficient to achieve the same function. For example, expressions describing shapes such as squares or cylinders shall not only represent geometrically precise shapes such as squares or cylinders, but also shapes that include protrusions, chamfers, etc., to the extent that the same effect can be achieved. On the other hand, expressions such as "to possess," "to be equipped with," "to have," "to include," or "to have" a single component are not exclusive expressions that exclude the existence of other components.

[0011] Figure 1 is a diagram illustrating an example of the configuration of a wind power generation facility 1 that is the target of abnormality diagnosis by the abnormality diagnosis system 40 of this disclosure. As shown in Figure 1, the wind power generation equipment 1 comprises a support column 2 erected on a foundation or the like, a nacelle 3 installed at the upper end of the support column 2, and a wind turbine rotor 4 rotatably mounted on one end of the nacelle 3. The wind turbine rotor 4 includes a rotor head 5 and a plurality of wind turbine blades 6 radially attached to the rotor head 5. The wind power generation equipment 1 also includes a blade pitch mechanism 12 for adjusting the pitch angle of each wind turbine blade 6 (hereinafter referred to as "blade pitch angle") and a yaw rotation mechanism 14 for adjusting the yaw angle of the nacelle 3.

[0012] Inside the nacelle 3 is a generator 11 connected to the wind turbine rotor 4 via a gearbox 10. The rotation of the wind turbine rotor 4 is transmitted to the generator 11 via the gearbox 10, driving the generator 11, which in turn outputs electricity.

[0013] The wind power generation equipment 1 includes an anemometer 7 for measuring the wind speed of the wind passing through the wind power generation equipment 1, a wind direction indicator 8 for measuring the wind direction of the wind passing through the wind power generation equipment 1, a thermometer 9 for measuring the temperature, a pitch angle sensor 15 for measuring the blade pitch angle, a generator output meter 16 for measuring the output of the generator 11, and a yaw angle sensor 18 for measuring the yaw angle αz of the nacelle 3. The anemometer 7, wind direction indicator 8, and thermometer 9 are installed on the outer surface of the nacelle 3 (for example, the top of the nacelle 3). The anemometer 7 may be, for example, a cup type or a windmill type anemometer. A cup type anemometer measures wind speed by measuring the rotation speed of a cup that rotates around a rotating shaft using a rotary encoder or the like, while a windmill type anemometer measures wind speed by measuring the rotation speed of a propeller-shaped blade that rotates around a rotating shaft using a rotary encoder or the like. The wind vane 8 may be a potentiometer-type wind vane that converts changes in the direction of the vane into changes in electrical resistance, for example, by measuring the angle that the direction of the wind flow makes with a predetermined reference direction (for example, north) as the wind direction. The yaw angle sensor 18 measures the angle that the rotation axis of the wind turbine rotor 4 makes with the above predetermined reference direction as the yaw angle of the nacelle 3. Hereinafter, the output of the generator 11 will be referred to as the "generator output".

[0014] A control device 20 for performing various operational controls of the wind power generation equipment 1 is installed in a suitable location on the wind power generation equipment 1 (for example, inside the nacelle 3 or inside the support column 2). The control device 20 receives signals indicating the measured wind speed Vm, which is the wind speed measured by the anemometer 7; the wind direction αw, which is the wind direction measured by the wind vane meter 8; the measured temperature T, which is the temperature measured by the thermometer 9; the measured blade pitch angle θ, which is the blade pitch angle measured by the pitch angle sensor 15; the measured generator output Pm, which is the generator output measured by the generator output meter 16; and the yaw angle αz of the nacelle 3, which is the yaw angle measured by the yaw angle sensor 18.

[0015] The control device 20 controls the blade pitch mechanism 12 to adjust the blade pitch angle to the optimal blade pitch angle based on various conditions such as the measured wind speed Vm measured by the anemometer 7. If the measured wind speed Vm measured by the anemometer 7 exceeds a predetermined cutout wind speed, the control device 20 performs cutout control, which controls the blade pitch angle to the feather position and automatically stops the rotation of the wind turbine rotor 4.

[0016] Furthermore, the control device 20 is configured to perform wind direction following control, which is a control that follows the wind direction so that the orientation of the wind turbine rotor 4 is directly facing the wind direction. Specifically, wind direction following control is a control that calculates the wind direction deviation Δα, which is the difference between the wind direction αw measured by the wind vane 8 and the yaw angle αz measured by the yaw angle sensor, and adjusts the yaw angle of the nacelle 3 by controlling the yaw rotation mechanism 14 to decrease the absolute value of the wind direction deviation Δα (preferably to make it 0) when the absolute value of the wind direction deviation Δα exceeds a threshold Δαth. Here, the wind direction deviation Δα is the angle that the wind direction measured by the wind vane 8 makes with respect to the rotation axis of the wind turbine rotor 4, and is calculated, for example, by subtracting the yaw angle αz from the wind direction αw.

[0017] The control device 20 is configured to communicate with the anomaly diagnosis system 40 via the communication network 21. The control device 20 transmits various measurement data measured by the wind power generation equipment 1 to the anomaly diagnosis system 40, such as the measured wind speed Vm measured by the anemometer 7, the wind direction measured by the wind vane meter 8, the measured temperature T measured by the thermometer 9, the measured blade pitch angle θ measured by the pitch angle sensor 15, the measured generator output Pm measured by the generator output meter 16, and the yaw angle αz of the nacelle 3 measured by the yaw angle sensor 18. The anomaly diagnosis system 40 stores the various measurement data transmitted from the control device 20 as time-series data and uses it for anomaly diagnosis of the wind power generation equipment 1 as described later.

[0018] Figure 2 shows an example of the hardware configuration of the anomaly diagnosis system 40 shown in Figure 1. Figure 3 is a block diagram illustrating the functional configuration of the anomaly diagnosis system 40 shown in Figure 2.

[0019] As shown in Figure 2, the anomaly diagnosis system 40 is configured using a computer that includes, for example, a processor 72, RAM (Random Access Memory) 74, ROM (Read Only Memory) 76, HDD (Hard Disk Drive) 78, input I / F 80, output I / F 82, and display 83, all of which are connected to each other via a bus 84. The hardware configuration of the anomaly diagnosis system 40 is not limited to the above and may be configured with a combination of control circuits and storage devices. Furthermore, the anomaly diagnosis system 40 is configured by a computer executing programs that realize each function of the anomaly diagnosis system 40. The functions of each part of the anomaly diagnosis system 40 described below are realized, for example, by loading a program held in ROM 76 into RAM 74 and executing it with the processor 72, as well as by reading and writing data to RAM 74 and ROM 76. The hardware constituting the anomaly diagnosis system 40 may be centralized in one location or distributed across multiple locations. The following describes an example in which the abnormality diagnosis system 40 is located away from the wind power generation equipment 1 and abnormality diagnoses of the wind power generation equipment 1 are performed remotely. However, each function of the abnormality diagnosis system 40 may be implemented, for example, by the control device 20 provided by the wind power generation equipment 1.

[0020] As shown in Figure 3, the anomaly diagnosis system 40 includes a measurement data acquisition unit 42, a plan output acquisition unit 44, a calculated wind speed calculation unit 46, an anomaly diagnosis unit 48, and a storage unit 50. The functions of each part of the anomaly diagnosis system 40 will be explained below using Figures 4 to 8, etc.

[0021] Figure 4 shows a portion of the abnormality diagnosis flow by the abnormality diagnosis system 40 shown in Figures 2 and 3. Figure 5 shows a continuation of a portion of the abnormality diagnosis flow shown in Figure 4. Figure 6 shows a continuation of a portion of the abnormality diagnosis flow shown in Figure 5. Figure 7 shows a continuation of a portion of the abnormality diagnosis flow shown in Figure 6. Figure 8 shows a continuation of a portion of the abnormality diagnosis flow shown in Figure 7.

[0022] As shown in Figure 4, in S101, the measurement data acquisition unit 42 acquires time-series data from the control device 20 via the communication network 21, including the measured wind speed Vm measured by the anemometer 7, the measured wind direction measured by the wind vane 8, the measured temperature T measured by the thermometer 9, the blade pitch angle θ measured by the pitch angle sensor 15, the measured output Pm of the generator 11 measured by the generator output meter 16, and the yaw angle αz measured by the yaw angle sensor 18.

[0023] In S102, the planned output acquisition unit 44 refers to the power curve Cp (see Figure 9) acquired from the storage unit 50 to identify the planned output Pp, which is the planned value of the generator output corresponding to the measured wind speed Vm acquired by the measurement data acquisition unit 42, from the power curve Cp and acquires the identified planned output Pp. As shown in Figure 9, the power curve Cp is correlation information that shows the relationship between wind speed and a predetermined planned value of the generator output (planned output), and is stored in the storage unit 50 in advance and read out from the storage unit 50 in S102.

[0024] In S103, the abnormality diagnosis unit 48 compares the measurement output Pm acquired in S101 with the planned output Pp acquired in S102 and calculates the difference ΔP between the measurement output Pm and the planned output Pp. Here, the difference ΔP is the value obtained by subtracting the planned output Pp from the measurement output Pm (= Pm - Pp). If the absolute value of the calculated difference ΔP is smaller than the threshold ΔPth, in S104, the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state X as described below. State X means that the wind power generation equipment 1 is in a normal state. When the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state X, it operates the wind power generation equipment 1 in normal operation mode. That is, when the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state X, it transmits a normal operation mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in normal operation mode. When the control device 20 receives a normal operation mode instruction signal, it operates the wind power generation equipment 1 in normal operation mode.

[0025] If the absolute value of the difference ΔP calculated in S103 is not less than the threshold ΔPth, the process proceeds to S105. As shown in Figure 5, in S105, the calculated wind speed calculation unit 46 obtains and refers to correlation information R1 (see Figure 10) from the storage unit 50, which shows the relationship between the generator output, blade pitch angle, and wind speed in the wind power generation equipment 1. Based on the measured output Pm obtained in S101, the measured value θ of the blade pitch angle, and the correlation information R1, the calculated wind speed Vc is calculated. For example, as shown in Figure 11, the calculated wind speed calculation unit 46 may calculate the calculated wind speed Vc by adding the value output from the function F(P) obtained by inputting the measured output Pm obtained in S101 into a predetermined function F(P), and the value output from the function F(θ) obtained by inputting the measured value θ of the blade pitch angle obtained in S101 into a predetermined function F(θ).

[0026] In S106, the abnormality diagnosis unit 48 compares the measured wind speed Vm obtained in S101 with the calculated wind speed Vc calculated in S104 and calculates the difference ΔV between the measured wind speed Vm and the calculated wind speed Vc. Here, the difference ΔV is the value obtained by subtracting the calculated wind speed Vc from the measured wind speed Vm (=Vm-Vc). If the absolute value of the calculated difference ΔV is smaller than the threshold ΔVth, the process proceeds to S107; otherwise, the process proceeds to S121.

[0027] In S107, the abnormality diagnosis unit 48 determines whether the temperature T acquired in S101 is lower than a threshold Tthl (for example, 10°C), and whether the difference ΔP calculated in S103 is greater than 0. If in S107 it is determined that the temperature T is lower than the threshold Tthl and the difference ΔP is greater than 0, then in S108 the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state H as described below. State H means that the measured output Pm deviates from the planned output Pp due to the temperature T being lower than the threshold Tthl and the air density being higher than normal.

[0028] The abnormality diagnosis unit 48, when it determines that the state of the wind power generation equipment 1 is state H, operates the wind power generation equipment 1 in output suppression mode. That is, when the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state H, it transmits an output suppression mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in output suppression mode. When the control device 20 receives the output suppression mode instruction signal, it operates the wind power generation equipment 1 in output suppression mode. The output suppression mode here refers to a mode in which the generator output is suppressed more than in the normal operation mode. The output suppression mode may also be a mode in which the blade pitch angle is controlled to the feather side more than in the normal operation mode. In output suppression mode, the control device 20 may suppress the output of the generator 11 more than in the normal operation mode by making the target output of the generator 11, which is determined according to the wind speed, smaller than in the normal operation mode, for example, as shown in Figure 13.

[0029] If, in S107, it is determined that the temperature T is not lower than the threshold Tthl and that ΔP is not greater than 0, the process proceeds to S109.

[0030] In S109, the abnormality diagnosis unit 48 determines whether the temperature T acquired in S101 is higher than the threshold Tthh (for example, 20°C), and whether the difference ΔP calculated in S103 is less than 0. If in S109 it is determined that the temperature T is higher than the threshold Tthh and the difference ΔP is less than 0, then in S110 the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state I as described below. State I means a state in which the measured output Pm deviates from the planned output Pp due to the temperature T being higher than the threshold Tthh and the air density being lower than normal. When the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state I, it operates the wind power generation equipment 1 in output optimization mode. That is, when the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state I, it transmits an output optimization mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in output optimization mode. When the control device 20 receives an output optimization mode instruction signal, it operates the wind power generation equipment 1 in output optimization mode. The output optimization mode, as defined here, is an operating mode in which the generator output is increased compared to the normal operating mode by changing the blade pitch angle. The output optimization mode may, for example, be a mode in which the blade pitch angle is controlled to a finer setting than in the normal operating mode. However, if the generator output does not increase even when the blade pitch angle is controlled to a finer setting in output optimization mode, the control device 20 may continue operating the wind power generation equipment 1 at the blade pitch angle that maximizes the generator output. In output optimization mode, the control device 20 may increase the output of the generator 11 compared to the normal operating mode by, for example, increasing the target output of the generator 11, which is determined according to the wind speed, compared to the normal operating mode, as shown in Figure 14.

[0031] In S109, if it is determined that the temperature T is not higher than the threshold Tthh and that ΔP is not less than 0, then in S111, the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state Z as described below. State Z means that although there is no abnormality in the anemometer 7, there is some unknown event that is preventing the proper operation of the wind power generation equipment 1. If the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state Z, it may, for example, send a stop-operation instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to automatically stop the operation of the wind power generation equipment 1, or it may send a notification indicating a request to dispatch an inspector to the wind power generation equipment 1. The abnormality diagnosis unit 48 may send the notification outside the abnormality diagnosis system 40, or it may be displayed on a display 83 (see Figure 2) provided by the abnormality diagnosis system 40. When the control device 20 receives the stop-operation instruction signal, it stops the operation of the wind power generation equipment 1. The control device 20 that stops the operation of the wind power generation equipment 1 may include, for example, control that changes the blade pitch angle to the feather position to stop the power generation of the generator 11.

[0032] As shown in Figure 6, in S121, it is determined whether the difference ΔP calculated in S103 is greater than 0. If it is determined in S121 that the difference ΔP is greater than 0, then in S122, the abnormality diagnosis unit 48 determines whether the wind speed turbulence intensity It is greater than or equal to the threshold Itth. The wind speed turbulence intensity (wind speed turbulence strength) is the ratio of the standard deviation of the wind speed to the average wind speed, and is calculated based on the measured wind speed obtained in S101. Also, as shown in Figure 12, the threshold Itth may decrease as the wind speed increases.

[0033] In S122, if it is determined that the intensity of wind turbulence It is greater than or equal to the threshold Itth, in S123, the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state G as described below. State G means that the measured output Pm is excessive compared to the planned output Pp due to the intensity of wind turbulence (over-performance). When the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state G, it operates the wind power generation equipment 1 in load suppression mode. That is, when the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state G, it transmits a load suppression mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in load suppression mode. When the control device 20 receives the load suppression mode instruction signal, it operates the wind power generation equipment 1 in load suppression mode. The load suppression mode here refers to a mode in which the wind load acting on the wind turbine blades 6 is suppressed more than in the normal operation mode. The load suppression mode may be, for example, a mode in which the blade pitch angle is controlled to the feather side more than in the normal operation mode. Specifically, in the load suppression mode, the control device 20 may suppress the wind load caused by the intensity of wind speed turbulence more than in the normal operation mode by independently controlling the blade pitch angle of each of the multiple wind turbine blades 6. In the load suppression mode, the control device 20 may, for example as shown in Figure 15, reduce the target output of the generator 11, which is determined according to the wind speed, compared to the normal operation mode, and, for example as shown in Figure 16, close the target blade pitch angle, which is determined according to the output of the generator 11, to the feather side more than in the normal operation mode, thereby suppressing the wind load acting on the wind turbine blades 6 more than in the normal operation mode.

[0034] In S122, if it is determined that the wind speed turbulence intensity It is not equal to or greater than the threshold Itth, then in S124, the abnormality diagnosis unit 48 determines whether the temperature T obtained in S101 is less than or equal to the threshold Tth0. Here, the threshold Tth0 is the temperature that indicates the freezing point of water, and may be, for example, 0°C or a temperature near 0°C. Note that the threshold Tth0 is a lower temperature than the threshold Tthl.

[0035] In S124, if it is determined that the temperature T is below the threshold Tth0, then in S125, the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state A as described below. State A means that the anemometer 7 is covered in ice (including the state in which the anemometer 7 is covered in snow due to snowfall), and in this state, the rotational resistance of the anemometer 7 is increased, and there is a possibility that the rotating part is stuck and unable to rotate. If the wind power generation equipment 1 continues to operate based on the measured value of the anemometer 7 while the anemometer 7 is covered in ice and cannot accurately measure the wind speed, safety stop control such as stopping operation due to high wind speed (for example, cutout control that stops the operation of the wind power generation equipment 1 when the wind speed exceeds the cutout wind speed) will not be possible, so there is a concern that the machine may fail or the safety function may deteriorate.

[0036] Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state A, it may send a notification to indicate that the anemometer 7 is in an icing state. The abnormality diagnosis unit 48 may send this notification outside the abnormality diagnosis system 40, or it may be displayed on, for example, a display unit 83 (see Figure 2) provided by the abnormality diagnosis system 40. In addition, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state A, it may operate the wind power generation equipment 1 in calculated wind speed operation mode. That is, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state A, it may send a calculated wind speed operation mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in calculated wind speed operation mode. When the control device 20 receives the calculated wind speed operation mode instruction signal, it operates the wind power generation equipment 1 in calculated wind speed operation mode. In this case, the control device 20 stops the operation of the wind power generation equipment 1 if the calculated wind speed Vc exceeds the cutout wind speed.

[0037] In this context, the calculated wind speed operation mode is a mode in which the calculated wind speed Vc is used as the wind speed for controlling the blade pitch angle, instead of the measured wind speed Vm measured by the anemometer 7. That is, in the calculated wind speed operation mode, the control device 20 controls the blade pitch mechanism 12 to adjust the blade pitch angle to what is considered the optimal blade pitch angle based on the calculated wind speed Vc. Furthermore, in the calculated wind speed operation mode, if the calculated wind speed Vc exceeds a predetermined cutout wind speed, the control device 20 performs cutout control, which controls the blade pitch angle to the feather position and stops the generator 11 from generating power.

[0038] In S124, if it is determined that the temperature T is not below the threshold Tth0, then in S126, the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state B as described below. State B means that there are signs of malfunction in the anemometer 7 or thermometer 9. In state B, if the operation of the wind power generation equipment 1 continues in a state where accurate wind speed cannot be measured, safety stop control such as stopping operation due to high wind speed (for example, cutout control that stops the operation of the wind power generation equipment 1 when the wind speed exceeds the cutout wind speed) will not be possible, so there is a concern that the machine may fail or the safety function may deteriorate.

[0039] Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state B, it will send a notification to inform the system that there are signs of a malfunction in the anemometer 7 or thermometer 9, and will recommend maintenance of the anemometer 7 and thermometer 9. The notification recommending maintenance here may be a notification recommending planned replacement or repair of parts of the wind vane 8 and thermometer 9 within a predetermined period (for example, within one month). The abnormality diagnosis unit 48 may send the notification outside the abnormality diagnosis system 40, or it may be displayed on a display unit 83 (see Figure 2) provided in the abnormality diagnosis system 40. Also, if the difference ΔV is small, the wind power generation equipment 1 may be operated in the calculated wind speed operation mode, similar to the case of state A. In this case, the control device 20 will stop the operation of the wind power generation equipment 1 if the calculated wind speed Vc exceeds the cutout wind speed.

[0040] As shown in Figure 7, in S131, the abnormality diagnosis unit 48 determines whether or not there is an abnormality in the wind direction tracking control described above. Specifically, for example, if the absolute value of the wind direction deviation Δα does not fall below the threshold αth even after performing the wind direction tracking control for a predetermined time t1 (for example, a fixed time such as 10 minutes) or more, that is, if the state in which the absolute value of the wind direction deviation Δα exceeds the threshold αth continues for a predetermined time t1 or more even after performing the wind direction tracking control, the abnormality diagnosis unit 48 determines that there is an abnormality in the wind direction tracking control. On the other hand, for example, if the absolute value of the wind direction deviation Δα falls below the threshold αth within a predetermined time by performing the wind direction tracking control, the abnormality diagnosis unit 48 determines that there is no abnormality in the wind direction tracking control.

[0041] If an abnormality is detected in the wind direction tracking control in S131, the abnormality diagnosis unit 48 determines in S132 whether the absolute value of the wind direction deviation Δα does not change for a predetermined time t2 (for example, a fixed time such as 10 minutes) or more even when wind direction tracking control is performed. If an abnormality is detected in the wind direction tracking control in S131, the procedure proceeds to S141. If it is determined in S132 that the absolute value of the wind direction deviation Δα does not change for a predetermined time t2 or more, the abnormality diagnosis unit 48 determines in S133 whether the temperature T measured by the thermometer 9 is less than or equal to the threshold Tth0.

[0042] In S133, if the temperature T measured by the thermometer 9 is determined to be below the threshold Tth0, then in S134, the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state C as described below. State C means that the wind vane 8 is covered in ice (including the state in which the wind vane 8 is covered in snow due to snowfall), and in this state, the rotational resistance of the wind vane 8 is increased, and there is a possibility that the rotating part is stuck and unable to rotate. If the rotating part of the wind vane 8 is stuck while there is a deviation in the direction of the wind vane 8's vane relative to the rotation axis of the wind turbine rotor 4, the deviation will not decrease even if the nacelle 3 is rotated by wind direction following control, and the wind direction following control will continue indefinitely. Note that the yaw angle of the nacelle 3 has limit angles in both clockwise and counterclockwise directions around a predetermined reference direction, so in wind direction following control, when the yaw angle of the nacelle 3 reaches the limit angle, the rotation direction of the nacelle is changed to the opposite direction to continue wind direction following.

[0043] In state C, if the wind power generation equipment 1 continues to operate in a state where accurate wind direction cannot be measured, it will become impossible to operate the wind turbine rotor 4 directly facing the wind direction (operation that makes the wind direction deviation Δα 0 or near 0), raising concerns about machine failure and a decrease in safety functions. For this reason, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state C, it may send a notification to indicate that the wind vane 8 is in an icing state. The abnormality diagnosis unit 48 may send this notification outside the abnormality diagnosis system 40, or it may be displayed on a display unit 83 (see Figure 2) provided in the abnormality diagnosis system 40. Furthermore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state C, it may automatically stop the operation of the wind power generation equipment 1. That is, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state C, it may send an operation stop instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to stop the operation of the wind power generation equipment 1. When the control device 20 receives a stop signal, it stops the operation of the wind power generation equipment 1. The control by the control device 20 to stop the operation of the wind power generation equipment 1 may include, for example, a control that changes the blade pitch angle to the feather position to stop the power generation of the generator 11.

[0044] In S132, if the system determines that the wind direction deviation Δα has changed within a predetermined time by performing wind direction tracking control, the abnormality diagnosis unit 48 determines in S135 that the state of the wind power generation equipment 1 is state Y as described below. State Y means that the wind vane 8 is deteriorating, and although it is possible to continue operating the wind power generation equipment 1, it is desirable to replace the wind vane 8. Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state Y, it sends a notification recommending a planned replacement of the wind vane 8 within a predetermined period (for example, within one month). The abnormality diagnosis unit 48 may send this notification outside the abnormality diagnosis system 40, or it may be displayed on a display 83 provided in the abnormality diagnosis system 40, for example.

[0045] In S133, if the temperature T measured by the thermometer 9 is determined to be not below the threshold Tth0, then in S136, the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state D as described below. State D is a state in which signs of malfunction have appeared in the wind vane 8. If the operation of the wind power generation equipment 1 continues, the signal indicating the wind direction deviation Δα will not stabilize, causing the yaw rotation of the nacelle 3 to continue, and there is a concern that the equipment for controlling the yaw rotation of the nacelle 3 will fail. In addition, it will become impossible to operate the wind turbine rotor 4 facing the wind direction (operation with the wind direction deviation Δα at or near zero), raising concerns about machine failure and a decrease in safety functions.

[0046] Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state D, it will send a notification to inform the system that there are signs of a malfunction in the wind vane 8 and recommend maintenance of the wind vane 8. The notification recommending maintenance here may be a notification recommending planned replacement or planned repair, such as replacing or repairing parts of the wind vane 8 within a predetermined period (for example, within one month). The abnormality diagnosis unit 48 may send the notification outside the abnormality diagnosis system 40, or it may be displayed on a display unit 83 provided in the abnormality diagnosis system 40, for example. If it is difficult to continue operating the wind power generation equipment 1 due to a malfunction of the wind vane 8, the operation of the wind power generation equipment 1 may be automatically stopped, for example. That is, an operation stop instruction signal may be sent to the control device 20 via the communication network 21 to instruct the control device 20 to stop the operation of the wind power generation equipment 1. When the control device 20 receives the operation stop instruction signal, it stops the operation of the wind power generation equipment 1. The control device 20 that stops the operation of the wind power generation equipment 1 may include, for example, control that changes the blade pitch angle to the feather position to stop the power generation of the generator 11.

[0047] As shown in Figure 8, in S141, it is determined whether or not there is an abnormality in the pitch control. For example, the abnormality diagnosis unit 48 classifies the data consisting of combinations of wind speed and the output of the generator 11, which change moment by moment, into wind speed intervals. If the peak-to-peak value of the generator output in the time-series data of the generator output classified into wind speed intervals is greater than the threshold value defined for each wind speed interval, it is determined that there is an abnormality in the pitch control. Conversely, if the peak-to-peak value of the generator output in the time-series data of the generator output classified into wind speed intervals is not greater than the threshold value defined for each wind speed interval, the abnormality diagnosis unit 48 is determined that there is no abnormality in the pitch control.

[0048] If an abnormality in pitch control is detected in S141, the abnormality diagnosis unit 48 determines in S142 that the state of the wind power generation equipment 1 is state E as described below. State E means that the blade pitch mechanism 12 is worn and deteriorated, and the output performance is reduced because the blade pitch angle cannot be controlled to the optimal blade pitch angle according to the wind speed. If the deterioration of the blade pitch mechanism 12 is left unattended, there is a concern that the degree of damage to the equipment will progress and become severe.

[0049] Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state E, it will send a notification to inform the system that the blade pitch mechanism 12 is worn and deteriorated, and will send a notification recommending maintenance of the worn part of the blade pitch mechanism 12. The notification recommending maintenance here may be a notification recommending planned replacement or planned repair, such as replacing or repairing the worn part of the blade pitch mechanism 12 within a predetermined period (for example, within one month). The abnormality diagnosis unit 48 may send the notification outside the abnormality diagnosis system 40, or it may be displayed on a display unit 83 (see Figure 2) provided in the abnormality diagnosis system 40. If the deterioration of the blade pitch mechanism 12 progresses to an unacceptable level, the operation of the wind power generation equipment 1 may be stopped (a stop-operation instruction signal may be sent to the control device 20 via the communication network 21 to instruct the control device 20 to stop the operation of the wind power generation equipment 1). Furthermore, if the deterioration of the blade pitch mechanism 12 is minor, the wind power generation equipment 1 may be operated in the load suppression mode described above in order to suppress the progression of deterioration of the blade pitch mechanism 12. That is, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state E, it may transmit a load suppression mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in the load suppression mode described above. When the control device 20 receives the load suppression mode instruction signal, it operates the wind power generation equipment 1 in load suppression mode.

[0050] If it is determined in S141 that there is no abnormality in the pitch control, then in S143 the abnormality diagnosis unit 48 determines whether the intensity of the wind speed disturbance It is greater than or equal to the threshold Itth. The determination method in S143 is the same as the determination method in S122, so the explanation is omitted.

[0051] If, in S143, the wind speed turbulence intensity It is determined to be greater than or equal to the threshold Itth, then in S144, the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state F as described below. State F means a state in which the measured output Pm is less than the planned output Pp due to a large wind speed turbulence intensity (performance degradation). If the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state F, it may operate the wind power generation equipment 1 in output optimization load suppression mode. That is, if the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state F, it may transmit an output optimization load suppression mode instruction signal to the control device 20 via the communication network 21 to instruct the control device 20 to operate the wind power generation equipment 1 in output optimization load suppression mode. If the control device 20 receives the output optimization load suppression mode instruction signal, it operates the wind power generation equipment 1 in output optimization load suppression mode. The output optimization load suppression mode described here may be a mode in which, for example, the wind load acting on the wind turbine blades 6 is suppressed compared to the normal operation mode by controlling the blade pitch angle to the finer side than in the normal operation mode, while increasing the generator output, and independently controlling the blade pitch angle of each of the multiple wind turbine blades 6. In the output optimization load suppression mode, the control device 20 may, for example as shown in Figure 17, increase the target output of the generator 11, which is determined according to the wind speed, compared to the normal operation mode, and, for example as shown in Figure 18, open the target blade pitch angle, which is determined according to the output of the generator 11, to the finer side than in the normal operation mode, thereby increasing the output of the generator 11 while suppressing the wind load acting on the wind turbine blades 6.

[0052] In S122, if it is determined that the intensity of the wind speed disturbance It is not equal to or greater than the threshold Itth, then in S145, the abnormality diagnosis unit 48 determines the state of the wind power generation equipment 1 to be state J. State J means that there are signs of a malfunction in the anemometer. In state J, if the operation of the wind power generation equipment 1 continues in a state where accurate wind speed cannot be measured, safety stop control such as stopping operation due to high wind speed (for example, cutout control that stops the operation of the wind power generation equipment 1 when the wind speed exceeds the cutout wind speed) will not be possible, raising concerns about machine failure and a decrease in safety functions.

[0053] Therefore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state J, it will issue a notification to inform the system that there are signs of a malfunction in the anemometer 7 and recommend maintenance of the anemometer 7. The notification recommending maintenance here may be a notification recommending planned replacement or planned repair, such as replacing or repairing parts of the anemometer 7 within a predetermined period (e.g., within one month). Furthermore, if the abnormality diagnosis unit 48 determines that the state of the wind power generation equipment 1 is state J, it may operate the wind power generation equipment 1 in the output optimization mode or normal operation mode described above based on the calculated wind speed.

[0054] This disclosure is not limited to the embodiments described above, but also includes modified forms of the embodiments described above, as well as forms that combine these forms as appropriate. In some embodiments, the accuracy of each threshold may be improved by performing supervised learning machine learning on the thresholds (Itth, Pth, Tth0, Tthh, Tthl) stored in the memory unit 50. That is, after an abnormality diagnosis by the abnormality diagnosis system 40, a human may input the relationship between each value to be compared with the threshold and whether or not a change in the operating mode (normal operating mode, output suppression mode, output optimization mode, or calculated wind speed operating mode), and the threshold may be repeatedly corrected.

[0055] The contents described in each of the above embodiments can be understood, for example, as follows:

[0056] [1] An anomaly diagnosis system for wind power generation equipment according to at least one embodiment of the present disclosure (e.g., the anomaly diagnosis system 40 described above) A measurement data acquisition unit (e.g., the measurement data acquisition unit 42 described above) is configured to acquire the measured wind speed (e.g., the measured wind speed Vm described above), which is the measured wind speed of the wind power generation equipment, the measured output (e.g., the measured output Pm described above), which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle (e.g., the measured blade pitch angle θ described above), A planned output acquisition unit (for example, the planned output Pp described above) is configured to acquire a planned output (for example, the planned output Pp described above) which is a planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment (for example, the power curve Cp described above) and the measured wind speed acquired by the measurement data acquisition unit, A calculated wind speed calculation unit (for example, the calculated wind speed Vc described above) is configured to calculate the calculated wind speed (for example, the calculated wind speed Vc described above) which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle, An abnormality diagnosis unit (for example, the abnormality diagnosis unit 48 described above) is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit, It is equipped with.

[0057] The abnormality diagnosis system for wind power generation equipment described in [1] above performs abnormality diagnosis of the wind power generation equipment not only based on a comparison between the measured wind speed and the calculated wind speed, but also based on a comparison between the measured output and the planned output. Compared to Patent Document 1, which performs abnormality diagnosis of wind power generation equipment based only on a comparison between the measured output and the planned output, this makes it possible to diagnose abnormalities in the wind power generation equipment more specifically. For example, if the difference between the measured output and the planned output is sufficiently small, it is considered that an appropriate generator output corresponding to the wind speed is being obtained. Therefore, even if the difference between the measured wind speed and the calculated wind speed is somewhat large, it is considered that no abnormality has occurred that would hinder the safe continuation of operation of the wind power generation equipment, and it is possible to continue operating the wind power generation equipment. As a result, it is possible to suppress a decrease in the operating rate of the wind power generation equipment based on the diagnosis results of the abnormality diagnosis unit.

[0058] [2] In some embodiments, the abnormality diagnosis system for wind power generation equipment described in [1] above, The abnormality diagnosis unit is configured to determine that there is no abnormality in the wind power generation equipment when the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is smaller than a threshold.

[0059] According to the abnormality diagnosis system for wind power generation equipment described in [2] above, if the absolute value of the difference between the measured output and the planned output is smaller than a threshold, it is considered that an appropriate generator output corresponding to the wind speed is being obtained. Therefore, even if the difference between the measured wind speed and the calculated wind speed is somewhat large, it is possible to determine that there is no abnormality in the wind power generation equipment and continue operating the wind power generation equipment. As a result, it is possible to suppress a decrease in the operating rate of the wind power generation equipment based on the diagnosis results of the abnormality diagnosis unit.

[0060] [3] In some embodiments, the abnormality diagnosis system for wind power generation equipment described in [1] or [2] above, The aforementioned measurement data acquisition unit is configured to acquire measured values ​​of temperature (for example, the temperature T mentioned above), The abnormality diagnosis unit is configured to operate the wind power generation equipment in normal operation mode when the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP mentioned above) is smaller than a first threshold (for example, the threshold Pth mentioned above). The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode that suppresses the generator output more than the normal operating mode when all of the following conditions (a), (b), and (c) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is smaller than the second threshold (for example, the threshold ΔVth mentioned above). (c) The temperature measurement value obtained by the measurement data acquisition unit is lower than the third threshold (for example, the threshold Tthl mentioned above), and the difference (for example, the difference ΔP mentioned above) between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than 0.

[0061] In the above-mentioned wind power generation facility, if condition (a) is met, it means that the measured output is in a state where it deviates from the normal range based on the planned output (the absolute value of the difference between the measured output and the planned output is not less than the first threshold). Furthermore, if conditions (b) and (c) are met, it is considered that although no malfunctions or other issues that would hinder the continued operation of the wind power generation facility have occurred, the measured output is deviating from the planned output due to the temperature being lower than the third threshold and the air density being higher than normal. For this reason, as described in [3] above, when all of conditions (a), (b), and (c) are met, operating the wind power generation facility in an operating mode that suppresses the wind load acting on the wind turbine blades can suppress the occurrence of damage caused by fatigue loads and suppress the decrease in the operating rate of the wind power generation facility. In addition, it is possible to suppress the occurrence of serious accidents caused by damage to the wind power generation facility and ensure public safety.

[0062] [4] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to [3] above, The aforementioned measurement data acquisition unit is configured to acquire measured values ​​of temperature (for example, the temperature T mentioned above), The abnormality diagnosis unit operates the wind power generation equipment in normal operation mode if the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit (for example, the absolute value of the difference ΔP mentioned above) is smaller than the first threshold (for example, the threshold ΔPth mentioned above). The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle, when all of the following conditions (a), (b), and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is smaller than the second threshold (for example, the difference ΔVth mentioned above). (d) The temperature measurement value obtained by the measurement data acquisition unit is higher than the fourth threshold (for example, the threshold ΔTthh mentioned above), and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit (for example, the difference ΔP mentioned above) is less than 0.

[0063] In the above-mentioned wind power generation facility, if condition (a) is met, it means that the measured output has deviated from the normal range based on the planned output (the absolute value of the difference between the measured output and the planned output is not less than the first threshold). Furthermore, if conditions (b) and (d) are met, it is considered that although no malfunctions or other issues that would hinder the continued operation of the wind power generation facility have occurred, the measured output has deviated from the planned output due to the temperature being above the fourth threshold and the air density being lower than normal. For this reason, as described in [4] above, when all conditions (a), (b), and (d) are met, operating the wind power generation facility in an operating mode in which the generator output is greater than the normal operating mode by changing the blade pitch angle can suppress the decrease in generator output caused by high temperature and low air density, while also suppressing the decrease in the operating rate of the wind power generation facility.

[0064] [5] In some embodiments, the abnormality diagnosis system for wind power generation equipment described in [3] above, The aforementioned measurement data acquisition unit is configured to acquire measured values ​​of temperature (for example, the temperature T mentioned above), The abnormality diagnosis unit operates the wind power generation equipment in normal operation mode if the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit (for example, the absolute value of ΔP as described above) is smaller than the first threshold (for example, ΔPth as described above). The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle, when all of the following conditions (a), (b), and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of ΔP as described above) is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is smaller than the second threshold (for example, the threshold ΔVth mentioned above). (d) The temperature measurement value obtained by the measurement data acquisition unit is higher than the fourth threshold (e.g., the threshold Tthh mentioned above) which is higher than the third threshold, and the difference (e.g., the difference ΔP mentioned above) between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is less than 0.

[0065] In the above-mentioned wind power generation facility, if condition (a) is met, it means that the measured output has deviated from the normal range based on the planned output (the absolute value of the difference between the measured output and the planned output is not less than the first threshold). Furthermore, if conditions (b) and (d) are met, it is considered that although no malfunctions or other issues that would hinder the continued operation of the wind power generation facility have occurred, the measured output has deviated from the planned output due to the temperature being above the fourth threshold and the air density being lower than normal. For this reason, as described in [4] above, when all conditions (a), (b), and (d) are met, operating the wind power generation facility in an operating mode in which the generator output is greater than the normal operating mode by changing the blade pitch angle can suppress the decrease in generator output caused by high temperature and low air density, while also suppressing the decrease in the operating rate of the wind power generation facility.

[0066] [6] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to [5] above, The abnormality diagnosis unit is configured to issue a notification requesting that the operation of the wind power generation facility be stopped and / or that an inspector be dispatched to the wind power generation facility if both of the following conditions (a) and (b) are met and neither of the following conditions (c) and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the difference ΔV mentioned above) is smaller than the second threshold (for example, the threshold ΔVth mentioned above). (c) The temperature measurement value obtained by the measurement data acquisition unit is lower than the third threshold (for example, the threshold Tthl mentioned above), and the difference (for example, the difference ΔP mentioned above) between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than 0. (d) The temperature measurement value obtained by the measurement data acquisition unit is equal to or greater than the fourth threshold (for example, the threshold Tthh mentioned above), and the difference (for example, the difference ΔP mentioned above) between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is less than 0.

[0067] In the above-mentioned wind power generation facility, if conditions (a) and (b) are met, it means that the measured output deviates from the normal range based on the planned output, even though the difference between the measured wind speed and the calculated wind speed is relatively small. Furthermore, in this case, if neither conditions (c) nor (d) are met, it is considered that the state in which conditions (a) and (b) are met is not caused by the temperature deviating from the normal range (the range between the third threshold and the fourth threshold). For this reason, if both conditions (a) and (b) are met, and neither conditions (c) nor (d) are met, it is considered that some unknown event is occurring that is hindering the proper operation of the wind power generation facility. In this case, as described in [6] above, damage to the wind power generation facility can be suppressed and / or a detailed inspection of the wind power generation facility can be carried out by issuing a notice requesting that the operation of the wind power generation facility be stopped and / or that inspectors be dispatched to the wind power generation facility.

[0068] [7] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to [6] above, The aforementioned measurement data acquisition unit is configured to acquire measured values ​​of temperature (for example, the temperature T mentioned above), The abnormality diagnosis unit is configured to operate the wind power generation equipment in normal operation mode when the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit (for example, the absolute value of the difference ΔP mentioned above) is smaller than a first threshold (for example, the threshold ΔPth mentioned above). The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode that suppresses the wind load acting on the wind turbine blades of the wind power generation equipment more than the normal operating mode when all of the following conditions (a), (e), (f), and (g) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (f) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is greater than 0. (g) The intensity of wind speed turbulence calculated based on the measured wind speed acquired by the measurement data acquisition unit (for example, the intensity of turbulence It described above) is equal to or greater than the fifth threshold (for example, the threshold Itth described above).

[0069] In the above-mentioned wind power generation facility, if all conditions (a), (e), (f), and (g) are met, it is considered that the measured output is excessive compared to the planned output due to the large intensity of wind speed turbulence (over-performance). Therefore, as described in [7] above, when all conditions (a), (e), (f), and (g) are met, operating the wind power generation facility in an operating mode that suppresses the wind load acting on the wind turbine blades more than the normal operating mode can suppress the occurrence of damage caused by fatigue loads while suppressing a decrease in the operating rate of the wind power generation facility. In addition, it is possible to suppress the occurrence of serious accidents caused by damage to the wind power generation facility and ensure public safety.

[0070] [8] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to [7] above, The aforementioned measurement data acquisition unit is configured to acquire measured values ​​of temperature (for example, the temperature T mentioned above), The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode that adjusts the blade pitch angle based on the calculated wind speed when all of the following conditions (a), (e), (f), (h), and (i) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (f) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is greater than 0. (h) The intensity of wind speed turbulence calculated based on the measured wind speed acquired by the measurement data acquisition unit (for example, the intensity of turbulence It described above) is not equal to or greater than the fifth threshold (for example, the threshold Itth described above). (i) The measured temperature obtained by the measurement data acquisition unit is less than or equal to the temperature that indicates the freezing point of water (for example, the threshold Tth0 mentioned above).

[0071] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (f), (h), and (i) are met, it means that the anemometer is iced (including the anemometer is iced due to snowfall). If the wind power generation facility continues to operate based on the anemometer's measurement when the anemometer is iced and cannot accurately measure the wind speed, safety shutdown control such as stopping operation due to high wind speed (for example, cutout control that stops the operation of the wind power generation facility when the wind speed exceeds the cutout wind speed) will not be possible, raising concerns about machine failure and a decrease in safety functions. For this reason, as described in [8] above, if all of conditions (a), (e), (f), (h), and (i) are met, the wind power generation facility can be operated in an operating mode that adjusts the blade pitch angle based on the calculated wind speed, thereby suppressing damage to the wind power generation facility and suppressing a decrease in the operating rate of the wind power generation facility. In addition, the occurrence of serious accidents caused by damage to the wind power generation facility can be suppressed and public safety can be ensured.

[0072] [9] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to [8] above, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to issue a notification recommending maintenance of the anemometer and thermometer of the wind power generation equipment if all of the following conditions (a), (e), (f), (h), and (j) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (f) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is greater than 0. (h) The intensity of wind speed turbulence calculated based on the measured wind speed acquired by the measurement data acquisition unit (for example, the intensity of turbulence It described above) is not equal to or greater than the fifth threshold (for example, the threshold Itth described above). (j) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water.

[0073] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (f), (h), and (j) are met, it means that signs of malfunction have appeared in the anemometer or thermometer. In this case, if the operation of wind power generation facility 1 continues while accurate wind speed cannot be measured, safety shutdown control such as stopping operation due to high wind speed (for example, cutout control that stops the operation of the wind power generation facility when the wind speed exceeds the cutout wind speed) will not be possible, raising concerns about machine failure and a decrease in safety functions. For this reason, as described in [9] above, if all of conditions (a), (e), (f), (h), and (j) are met, issuing a notice recommending maintenance of the anemometer and thermometer of the wind power generation facility can suppress damage to the wind power generation facility and suppress a decrease in the operating rate of the wind power generation facility. In addition, it is possible to suppress the occurrence of serious accidents caused by damage to the wind power generation facility and ensure public safety. Furthermore, it is possible to reduce the workload on workers by avoiding sudden construction work.

[0074]

[10] In some embodiments, in an abnormality diagnosis system for wind power generation equipment described in any of [1] to [9] above, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to shut down the operation of the wind power generation equipment when all of the following conditions (a), (e), (k), (i), (l), and (m) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (i) The temperature measurement obtained by the measurement data acquisition unit is less than or equal to the temperature that indicates the freezing point of water (for example, Tth0 as described above). (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα described above), then the absolute value of the wind direction deviation (for example, the wind direction deviation Δα described above) exceeds the sixth threshold (for example, the threshold αth described above) for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

[0075] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (k), (i), (l), and (m) are met, it means that the wind vane is in a state of ice formation. In this case, if the wind power generation facility continues to operate in a state where accurate wind direction cannot be measured, it will become impossible to operate the wind turbine rotor in a way that is directly aligned with the wind direction (operation that makes the wind direction deviation 0 or close to 0), which raises concerns about machine failure and a decrease in safety functions. For this reason, as described in

[10] above, if all of conditions (a), (e), (k), (i), (l), and (m) are met, the operation of the wind power generation facility can be stopped to suppress damage to the wind power generation facility. In addition, the occurrence of serious accidents caused by damage to the wind power generation facility can be suppressed and public safety can be ensured.

[0076]

[11] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[10] above, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to send a notification indicating that the wind vane of the wind turbine is icy when all of the following conditions (a), (e), (k), (i), (l), and (m) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (i) The measured temperature obtained by the measurement data acquisition unit is less than or equal to the temperature that indicates the freezing point of water (for example, the temperature ΔTth0 mentioned above). (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα described above), then the absolute value of the wind direction deviation (for example, the wind direction deviation Δα described above) exceeds the sixth threshold (for example, the threshold αth described above) for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

[0077] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (k), (i), (l), and (m) are met, it means that the wind vane is in an icing state. In this case, as described in

[11] above, by issuing a notification to indicate that the wind vane of the wind power generation facility is icing, it is possible to recognize that the wind vane is icing and take appropriate action.

[0078]

[12] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[11] above, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to issue a notification recommending maintenance of the wind vane of the wind power generation equipment when all of the following conditions (a), (e), (k), (l), (m), and (n) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα described above), then the absolute value of the wind direction deviation (for example, the wind direction deviation Δα described above) exceeds the sixth threshold (for example, the threshold αth described above) for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water.

[0079] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (k), (l), (m), and (n) are met, it indicates that there are signs of a malfunction in the wind vane. If the operation of the wind power generation facility continues, the signal indicating the wind direction deviation will not stabilize, causing the nacelle to continue yaw-turning, and there is a concern that the equipment for controlling the nacelle's yaw-turning will fail. In addition, it will become impossible to operate the wind turbine rotor facing the wind direction, raising concerns about mechanical failure and a decrease in safety functions. For this reason, as described in

[12] above, if all of conditions (a), (e), (k), (l), (m), and (n) are met, a notice recommending maintenance of the wind vane of the wind power generation facility can be issued, allowing the wind vane to be replaced and damage to the wind power generation facility to be suppressed. In addition, the occurrence of serious accidents caused by damage to the wind power generation facility can be suppressed and public safety can be ensured.

[0080]

[13] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[12] above, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to shut down the operation of the wind power generation equipment when all of the following conditions (a), (e), (k), (l), (m), and (n) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα described above), then the absolute value of the wind direction deviation (for example, the wind direction deviation Δα described above) exceeds the sixth threshold (for example, the threshold αth described above) for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water (for example, the threshold Tth0 mentioned above).

[0081] In the above-mentioned wind power generation facility, if all conditions (a), (e), (k), (l), (m), and (n) are met, it indicates that there are signs of a malfunction in the wind vane. If the operation of the wind power generation facility is continued, the wind direction deviation signal will remain unstable, causing the nacelle to continue yaw-turning, and there is a concern that the equipment for controlling the nacelle's yaw-turning may fail. In addition, it will become impossible to operate the wind turbine rotor facing the wind direction, raising concerns about mechanical failure and a decrease in safety functions. For this reason, as described in

[13] above, if all conditions (a), (e), (k), (l), (m), and (n) are met, the operation of the wind power generation facility can be stopped to suppress damage to the wind power generation facility. Furthermore, the occurrence of serious accidents caused by damage to the wind power generation facility can be suppressed, and public safety can be ensured.

[0082]

[14] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[13] above, The abnormality diagnosis unit is configured to issue a notification recommending maintenance of the wind vane of the wind power generation equipment when all of the following conditions (a), (e), (k), (l), and (o) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα described above), then the absolute value of the wind direction deviation (for example, the wind direction deviation Δα described above) exceeds the sixth threshold (for example, the threshold αth described above) for a predetermined period of time or longer. (o) The wind direction deviation changes within a predetermined time.

[0083] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (k), (l), and (o) are met, it means that the wind vane is in a deteriorated state, and although it is possible to continue operating the wind power generation facility, it is desirable to replace the wind vane. Therefore, as described in

[14] above, if all of conditions (a), (e), (k), (l), and (o) are met, a notice recommending maintenance of the wind vane can be issued, allowing the facility to recognize that the wind vane is deteriorated and take appropriate action.

[0084]

[15] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[14] above, The abnormality diagnosis unit is configured to issue a notification recommending the replacement of worn parts of the blade pitch mechanism (e.g., the blade pitch mechanism 12 described above) of the wind power generation equipment if all of the following conditions (a), (e), (k), (p), and (q) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (p) If the angle formed by the wind direction measured by the wind vane with respect to the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα mentioned above), then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold (for example, the threshold αth mentioned above) does not continue for a predetermined time or longer. (q) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is greater than the threshold value defined for each wind speed interval.

[0085] In the above-mentioned wind power generation equipment, if all of conditions (a), (e), (k), (p), and (q) are met, it means that the blade pitch mechanism is worn and deteriorated, and the output performance is reduced because the pitch angle cannot be controlled to the optimal pitch angle according to the wind speed. If the deterioration of the blade pitch mechanism is left unattended, there is a concern that the degree of damage to the equipment will progress and become severe. For this reason, as described in

[15] above, if all of conditions (a), (e), (k), (p), and (q) are met, a notice recommending the replacement of the worn part of the blade pitch mechanism can be issued, thereby reducing damage to the wind power generation equipment. Furthermore, it is possible to reduce the occurrence of serious accidents caused by damage to wind power generation equipment and ensure public safety.

[0086]

[16] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[15] above, The abnormality diagnosis unit operates the wind power generation equipment in normal operation mode if the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP mentioned above) is smaller than the first threshold (for example, the threshold ΔPth mentioned above). The abnormality diagnosis unit is configured to operate the wind power generation equipment in an operating mode that increases the generator output compared to the normal operating mode and suppresses the wind load acting on the wind turbine blades of the wind power generation equipment compared to the normal operating mode, when all of the following conditions (a), (e), (g), (k), (p), and (r) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (g) The intensity of wind speed turbulence calculated based on the measured wind speed acquired by the measurement data acquisition unit (for example, the intensity of turbulence It described above) is equal to or greater than the fifth threshold (for example, the threshold Itth described above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (p) If the angle formed by the wind direction measured by the wind vane with respect to the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα mentioned above), then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold (for example, the threshold αth mentioned above) does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

[0087] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (g), (k), (p), and (r) are met, it means that the measured output is less than the planned output due to the large intensity of wind speed turbulence (performance degradation). Therefore, as described in

[16] above, if all of conditions (a), (e), (g), (k), (p), and (r) are met, the wind power generation facility can be operated in an operating mode that suppresses the wind load acting on the wind turbine blades more than the normal operating mode, thereby suppressing the occurrence of damage caused by fatigue loads and preventing a decrease in the operating rate of the wind power generation facility. In addition, it is possible to suppress the occurrence of serious accidents caused by damage to the wind power generation facility and ensure public safety.

[0088]

[17] In some embodiments, in the abnormality diagnosis system for wind power generation equipment described in any of [1] to

[16] above, The abnormality diagnosis unit is configured to issue a notification recommending maintenance of the anemometer of the wind power generation equipment when all of the following conditions (a), (e), (h), (k), (p), and (r) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the absolute value of the difference ΔP described above) is not less than the first threshold (for example, the threshold ΔPth described above). (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit (for example, the absolute value of the difference ΔV mentioned above) is not less than the second threshold (for example, the threshold ΔVth mentioned above). (h) The intensity of wind speed turbulence calculated based on the measured wind speed acquired by the measurement data acquisition unit (for example, the intensity of turbulence It described above) is not equal to or greater than the fifth threshold (for example, the threshold Itth described above). (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit (for example, the difference ΔP described above) is less than 0. (p) If the angle formed by the wind direction measured by the wind vane with respect to the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation (for example, the wind direction deviation Δα mentioned above), then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold (for example, the threshold αth mentioned above) does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

[0089] In the above-mentioned wind power generation facility, if all of conditions (a), (e), (h), (k), (p), and (r) are met, it means that the measured output is excessive compared to the planned output due to the intensity of wind speed turbulence (over-performance). Therefore, as described in

[17] above, if all of conditions (a), (e), (h), (k), (p), and (r) are met, issuing a notice recommending maintenance of the anemometer and thermometer of the wind power generation facility can suppress damage to the wind power generation facility and suppress a decrease in the operating rate of the wind power generation facility. In addition, it is possible to suppress the occurrence of serious accidents caused by damage to the wind power generation facility and ensure public safety. Furthermore, it is possible to reduce the workload on workers by avoiding sudden construction work.

[0090]

[18] The method for diagnosing abnormalities in a wind power generation facility according to at least one embodiment of the present disclosure is: A data acquisition step to acquire the measured wind speed (e.g., the measured wind speed Vm mentioned above), which is the measured wind speed of the wind power generation equipment, the measured output (e.g., the measured output Pm mentioned above), which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle (e.g., the measured blade pitch angle θ mentioned above), A planned output acquisition step to acquire a planned output (for example, the planned output Pp described above), which is a planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates a calculated wind speed (for example, the calculated wind speed Vc described above) which is a calculated value of the wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle, An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. It is equipped with.

[0091] The abnormality diagnosis method for wind power generation equipment described in

[18] above performs abnormality diagnosis of the wind power generation equipment not only based on a comparison between the measured wind speed and the calculated wind speed, but also based on a comparison between the measured output and the planned output. Compared to Patent Document 1, which performs abnormality diagnosis of wind power generation equipment based only on a comparison between the measured output and the planned output, it is possible to diagnose abnormalities in wind power generation equipment more specifically. For example, if the difference between the measured output and the planned output is sufficiently small, it is considered that an appropriate generator output corresponding to the wind speed is being obtained. Therefore, even if the difference between the measured wind speed and the calculated wind speed is somewhat large, it is considered that no abnormality has occurred that would hinder the safe continuation of operation of the wind power generation equipment, and it is possible to continue operating the wind power generation equipment. As a result, it is possible to suppress a decrease in the operating rate of the wind power generation equipment based on the diagnosis results of the abnormality diagnosis unit. [Explanation of Symbols]

[0092] 1. Wind power generation facilities 2 pillars 3 Nasser 4 Wind turbine rotors 5 rotorheads 6 windmill blade 7 Anemometer 8 Wind vane 9 Thermometer 10 Speed ​​increaser 11 Generators 12. Wing pitch mechanism 14. Swivel mechanism 15 Pitch Angle Sensor 16. Generator output meter 18 Yaw angle sensor 20 Control device 21 Communication Networks 40 Anomaly Diagnosis System 42 Measurement data acquisition unit 44. Planned Output Acquisition Unit 46 Calculation wind speed calculation section 48. Department of Abnormal Diagnosis 50 Storage section 72 processors 74 RAM 76 ROM 78 HDD 80 Input Interfaces 82 Output Interfaces 83 Display 84 Bus

Claims

1. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to operate the wind power generation equipment in normal operation mode when the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is smaller than a first threshold. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode that suppresses the generator output more than the normal operating mode when all of the following conditions (a), (b), and (c) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is smaller than the second threshold. (c) The temperature measurement value obtained by the measurement data acquisition unit is lower than the third threshold, and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than zero.

2. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit operates the wind power generation equipment in normal operation mode if the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit is smaller than the first threshold. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle when all of the following conditions (a), (b), and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is smaller than the second threshold. (d) The temperature measurement value obtained by the measurement data acquisition unit is higher than the fourth threshold, and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is less than 0.

3. The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to operate the wind power generation equipment in normal operation mode when the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit is smaller than a first threshold. The abnormality diagnosis system for a wind power generation facility according to claim 1, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle when all of the following conditions (a), (b), and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is smaller than the second threshold. (d) The temperature measurement value obtained by the measurement data acquisition unit is higher than the fourth threshold which is higher than the third threshold, and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is less than 0.

4. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to issue a notification indicating a request to shut down the operation of the wind power generation facility and / or to dispatch an inspector to the wind power generation facility when both of the following conditions (a) and (b) are met and neither of the following conditions (c) and (d) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is smaller than the second threshold. (c) The temperature measurement value obtained by the measurement data acquisition unit is lower than the third threshold, and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than zero. (d) The temperature measurement value obtained by the measurement data acquisition unit is equal to or greater than the fourth threshold, and the difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is less than 0.

5. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. The abnormality diagnosis unit is configured to operate the wind power generation equipment in normal operation mode when the absolute value of the difference between the plan output acquired by the plan output acquisition unit and the measurement output acquired by the measurement data acquisition unit is smaller than a first threshold. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode that suppresses the wind load acting on the wind turbine blades of the wind power generation facility more than the normal operating mode when all of the following conditions (a), (e), (f), and (g) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (f) The difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than 0. (g) The intensity of wind speed disturbance calculated based on the measured wind speed acquired by the measurement data acquisition unit is equal to or greater than the fifth threshold.

6. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode that adjusts the blade pitch angle based on the calculated wind speed when all of the following conditions (a), (e), (f), (h), and (i) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (f) The difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than 0. (h) The intensity of wind speed disturbance calculated based on the measured wind speed acquired by the measurement data acquisition unit is not equal to or greater than the fifth threshold. (i) The temperature measurement obtained by the measurement data acquisition unit is below the temperature that indicates the freezing point of water.

7. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An anomaly diagnosis system for wind power generation equipment, wherein the anomaly diagnosis unit is configured to issue a notification recommending maintenance of the anemometer and thermometer of the wind power generation equipment when all of the following conditions (a), (e), (f), (h), and (j) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (f) The difference between the measurement output obtained by the measurement data acquisition unit and the plan output obtained by the plan output acquisition unit is greater than 0. (h) The intensity of wind speed disturbance calculated based on the measured wind speed acquired by the measurement data acquisition unit is not equal to or greater than the fifth threshold. (j) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water.

8. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An abnormality diagnosis system for wind power generation equipment, wherein the abnormality diagnosis unit is configured to shut down the operation of the wind power generation equipment when all of the following conditions (a), (e), (k), (i), (l), and (m) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (i) The temperature measurement obtained by the measurement data acquisition unit is below the temperature that indicates the freezing point of water. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

9. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An anomaly diagnosis system for a wind power generation facility, wherein the anomaly diagnosis unit is configured to send a notification indicating that the wind vane of the wind power generation facility is in an icing state when all of the following conditions (a), (e), (k), (i), (l), and (m) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (i) The temperature measurement obtained by the measurement data acquisition unit is below the temperature that indicates the freezing point of water. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

10. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An anomaly diagnosis system for wind power generation equipment, wherein the anomaly diagnosis unit is configured to issue a notification recommending maintenance of the wind vane of the wind power generation equipment when all of the following conditions (a), (e), (k), (l), (m), and (n) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water.

11. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The aforementioned measurement data acquisition unit is configured to acquire temperature measurement values. An abnormality diagnosis system for wind power generation equipment, wherein the abnormality diagnosis unit is configured to shut down the operation of the wind power generation equipment when all of the following conditions (a), (e), (k), (l), (m), and (n) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The temperature measurement obtained by the measurement data acquisition unit is not below the temperature indicating the freezing point of water.

12. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, An anomaly diagnosis system for a wind power generation facility, wherein the anomaly diagnosis unit is configured to issue a notification recommending maintenance of the wind vane of the wind power generation facility when all of the following conditions (a), (e), (k), (l), and (o) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (o) The wind direction deviation changes within a predetermined time.

13. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, An anomaly diagnosis system for a wind turbine, wherein the anomaly diagnosis unit is configured to issue a notification recommending the replacement of a worn portion of the blade pitch mechanism of the wind turbine when all of the following conditions (a), (e), (k), (p), and (q) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (q) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is greater than the threshold value defined for each wind speed interval.

14. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, The abnormality diagnosis unit operates the wind power generation equipment in normal operation mode if the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is smaller than a first threshold. An abnormality diagnosis system for a wind power generation facility, wherein the abnormality diagnosis unit is configured to operate the wind power generation facility in an operating mode that increases the generator output compared to the normal operating mode and suppresses the wind load acting on the wind turbine blades of the wind power generation facility compared to the normal operating mode when all of the following conditions (a), (e), (g), (k), (p), and (r) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (g) The intensity of wind speed disturbance calculated based on the measured wind speed acquired by the measurement data acquisition unit is equal to or greater than the fifth threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

15. A measurement data acquisition unit configured to acquire the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition unit is configured to acquire a planned output, which is a planned value of the generator output of the wind power generation equipment corresponding to the measured wind speed acquired by the measurement data acquisition unit, by referring to the power curve of the wind power generation equipment. A calculated wind speed calculation unit is configured to calculate the calculated wind speed, which is the calculated value of the wind speed of the wind power generation equipment, based on the measurement output acquired by the measurement data acquisition unit and the measured value of the blade pitch angle. An abnormality diagnosis unit is configured to perform an abnormality diagnosis of the wind power generation equipment based on a comparison between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit, and a comparison between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit. Equipped with, An anomaly diagnosis system for a wind power generation facility, wherein the anomaly diagnosis unit is configured to issue a notification recommending maintenance of the anemometer of the wind power generation facility when all of the following conditions (a), (e), (h), (k), (p), and (r) are met. (a) The absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed acquired by the measurement data acquisition unit and the calculated wind speed calculated by the calculated wind speed calculation unit is not less than the second threshold. (h) The intensity of wind speed disturbance calculated based on the measured wind speed acquired by the measurement data acquisition unit is not equal to or greater than the fifth threshold. (k) The difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

16. The abnormality diagnosis unit is configured to determine that there is no abnormality in the wind power generation equipment when the absolute value of the difference between the measurement output acquired by the measurement data acquisition unit and the plan output acquired by the plan output acquisition unit is smaller than a threshold, as described in any one of claims 1 to 15.

17. A data acquisition step involves acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment. A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. The abnormality diagnosis step involves operating the wind power generation equipment in normal operation mode if the absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is smaller than a first threshold. The abnormality diagnosis step is an abnormality diagnosis method for a wind power generation facility, which operates the wind power generation facility in an operating mode that suppresses the generator output more than the normal operating mode when all of the following conditions (a), (b), and (c) are met. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is smaller than the second threshold. (c) The temperature measurement obtained by the data acquisition step is lower than the third threshold, and the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is greater than zero.

18. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. The abnormality diagnosis step involves operating the wind power generation equipment in normal operation mode if the absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is smaller than a first threshold. The abnormality diagnosis step is an abnormality diagnosis method for a wind power generation facility, wherein the wind power generation facility is operated in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle, when all of the following conditions (a), (b), and (d) are met. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is smaller than the second threshold. (d) The temperature measurement obtained by the data acquisition step is higher than the fourth threshold, and the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0.

19. The method for diagnosing an abnormality in a wind power generation facility according to claim 17, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (b), and (d) are met, the wind power generation facility is operated in an operating mode in which the generator output is greater than that of the normal operating mode by changing the blade pitch angle. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is smaller than the second threshold. (d) The measured temperature obtained by the data acquisition step is higher than the fourth threshold which is higher than the third threshold, and the difference between the measured output obtained by the data acquisition step and the planned output obtained by the planned output acquisition step is less than 0.

20. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if both of the following conditions (a) and (b) are met and neither of the following conditions (c) and (d) are met, a notification is issued requesting that the operation of the wind power generation facility be stopped and / or that an inspector be dispatched to the wind power generation facility. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (b) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is smaller than the second threshold. (c) The temperature measurement obtained by the data acquisition step is lower than the third threshold, and the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is greater than zero. (d) The measured temperature value obtained by the data acquisition step is equal to or greater than the fourth threshold, and the difference between the measured output obtained by the data acquisition step and the planned output obtained by the planned output acquisition step is less than 0.

21. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. In the abnormality diagnosis step, if the absolute value of the difference between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step is smaller than the first threshold, the wind power generation equipment is operated in normal operation mode. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (f), and (g) are met, the wind power generation facility is operated in an operating mode that suppresses the wind load acting on the wind turbine blades of the wind power generation facility more than the normal operating mode. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (f) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is greater than 0. (g) The intensity of wind speed disturbance calculated based on the measured wind speed obtained in the data acquisition step is equal to or greater than the fifth threshold.

22. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein in the abnormality diagnosis step, the wind power generation facility is operated in an operating mode that adjusts the blade pitch angle based on the calculated wind speed when all of the following conditions (a), (e), (f), (h), and (i) are met. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (f) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is greater than 0. (h) The intensity of wind speed disturbance calculated based on the measured wind speed obtained in the data acquisition step is not equal to or greater than the fifth threshold. (i) The measured temperature obtained by the data acquisition step is below the temperature at which water freezes.

23. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (f), (h), and (j) are met, a notification is issued recommending maintenance of the anemometer and thermometer of the wind power generation facility. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (f) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is greater than 0. (h) The intensity of wind speed disturbance calculated based on the measured wind speed obtained in the data acquisition step is not equal to or greater than the fifth threshold. (j) The measured temperature obtained by the data acquisition step is not below the temperature indicating the freezing point of water.

24. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein in the abnormality diagnosis step, if all of the following conditions (a), (e), (k), (i), (l), and (m) are met, the operation of the wind power generation facility is stopped. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (i) The measured temperature obtained by the data acquisition step is below the temperature at which water freezes. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

25. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (k), (i), (l), and (m) are met, a notification is issued to indicate that the wind vane of the wind power generation facility is in an icing state. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (i) The measured temperature obtained by the data acquisition step is below the temperature at which water freezes. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer.

26. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (k), (l), (m), and (n) are met, a notification recommending maintenance of the wind vane of the wind power generation facility is issued. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The measured temperature obtained by the data acquisition step is not below the temperature indicating the freezing point of water.

27. ​​A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the data acquisition step described above, temperature measurements are obtained. A method for diagnosing abnormalities in a wind power generation facility, wherein in the abnormality diagnosis step, if all of the following conditions (a), (e), (k), (l), (m), and (n) are met, the operation of the wind power generation facility is stopped. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (m) The wind direction deviation does not change for a predetermined period of time or longer. (n) The measured temperature obtained by the data acquisition step is not below the temperature indicating the freezing point of water.

28. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, a notification is issued recommending maintenance of the wind vane of the wind power generation facility if all of the following conditions (a), (e), (k), (l), and (o) are met. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (l) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the absolute value of the wind direction deviation exceeds the sixth threshold for a predetermined period of time or longer. (o) The wind direction deviation changes within a predetermined time.

29. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (k), (p), and (q) are met, a notification is issued recommending the replacement of the worn portion of the blade pitch mechanism of the wind power generation facility. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (q) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is greater than the threshold value defined for each wind speed interval.

30. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, In the abnormality diagnosis step, if the absolute value of the difference between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step is smaller than the first threshold, the wind power generation equipment is operated in normal operation mode. A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (g), (k), (p), and (r) are met, the wind power generation facility is operated in an operating mode that increases the generator output compared to the normal operating mode and suppresses the wind load acting on the wind turbine blades of the wind power generation facility compared to the normal operating mode. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (g) The intensity of wind speed disturbance calculated based on the measured wind speed obtained in the data acquisition step is equal to or greater than the fifth threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

31. A data acquisition step of acquiring the measured wind speed, which is the measured wind speed of the wind power generation equipment, the measured output, which is the measured generator output of the wind power generation equipment, and the measured blade pitch angle of the wind power generation equipment, A planned output acquisition step, which acquires the planned output, which is the planned value of the generator output of the wind power generation equipment determined from the power curve of the wind power generation equipment and the measured wind speed acquired in the data acquisition step, A calculated wind speed calculation step calculates the calculated wind speed, which is the calculated wind speed of the wind power generation equipment, based on the measurement output obtained in the data acquisition step and the measured value of the blade pitch angle. An abnormality diagnosis step is performed to diagnose an abnormality in the wind power generation equipment based on a comparison between the measurement output obtained in the data acquisition step and the plan output obtained in the plan output acquisition step, and a comparison between the measured wind speed obtained in the data acquisition step and the calculated wind speed calculated in the calculated wind speed calculation step. Equipped with, A method for diagnosing abnormalities in a wind power generation facility, wherein, in the abnormality diagnosis step, if all of the following conditions (a), (e), (h), (k), (p), and (r) are met, a notification recommending maintenance of the anemometer of the wind power generation facility is issued. (a) The absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is not less than the first threshold. (e) The absolute value of the difference between the measured wind speed obtained by the data acquisition step and the calculated wind speed calculated by the calculated wind speed calculation step is not less than the second threshold. (h) The intensity of wind speed disturbance calculated based on the measured wind speed obtained in the data acquisition step is not equal to or greater than the fifth threshold. (k) The difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is less than 0. (p) If the angle between the wind direction measured by the wind vane and the rotation axis of the wind turbine rotor in the wind power generation facility is defined as the wind direction deviation, then the state in which the absolute value of the wind direction deviation exceeds the sixth threshold does not continue for a predetermined time or longer. (r) The peak-to-peak value of the generator output in the time-series data of generator output classified by wind speed interval is not greater than the threshold value defined for each wind speed interval.

32. The method for diagnosing an abnormality in a wind power generation facility according to any one of claims 17 to 31, wherein in the abnormality diagnosis step, if the absolute value of the difference between the measurement output obtained by the data acquisition step and the plan output obtained by the plan output acquisition step is smaller than a threshold, it is determined that there is no abnormality in the wind power generation facility.

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