JP7146580B2 - Wind power generator and wind power generation system - Google Patents

Description

The present invention relates to a wind turbine generator and a wind turbine generator system including a wind farm composed of a plurality of wind turbine generators, and more particularly to a wind turbine generator and a wind turbine generator system having a yaw actuator abnormality detection function.

2. Description of the Related Art In recent years, from the viewpoint of protecting the global environment, attention has been focused on wind power generators that generate power using wind power. A wind power generator generally has a rotor with a plurality of blades attached to a hub, and the rotational energy of the rotor that rotates in response to the wind drives a generator.
Generally, wind conditions to which a wind turbine generator is subjected differ depending on the influence of topography and the like. If the actual wind conditions are more severe than the design assumptions, the fluctuating load that the wind power generator receives will increase. Therefore, each component of the wind power generator (for example, blades, nacelles, towers, and auxiliary equipment) may be damaged earlier than assumed at the time of design, and the time for replacement may be hastened. When unexpected damage occurs, it takes time to arrange replacement parts and replacement work, resulting in downtime.

For example, a technique described in Patent Literature 1 has been proposed as a wind turbine generator capable of shortening the stop time of power generation operation by detecting an abnormality in a speed reducer and carrying out planned repairs. In Patent Document 1, a plurality of reduction gears constituting a yaw drive device and a motor connected to the reduction gears are provided, and an abnormality determination unit that determines an abnormality of the reduction gears is provided for each motor measured by an individual watt-hour meter. are compared, and if the difference in the integrated power consumption of at least two motors is equal to or greater than a predetermined value, it is determined that the reduction gear corresponding to the motor with the smaller integrated power consumption is in an abnormal state. It is disclosed. In addition, in Patent Document 1, when there are three or more motors, the difference between two integrated power consumption amounts is taken for all motors, and even one of all the differences is a predetermined value. It is stated that when the threshold value of is exceeded, it is judged to be abnormal.

JP 2015-74998 A

However, in the configuration disclosed in Patent Literature 1, since the abnormality of the speed reducer is determined based on the difference in the accumulated power consumption of the two motors, it takes time to obtain the accumulated power consumption. It is difficult to determine the abnormality of the speed reducer.
Accordingly, the present invention provides a wind turbine generator and a wind turbine generator system capable of early determination of an abnormality in the yaw actuator.

In order to solve the above problems, a wind turbine generator according to the present invention includes a nacelle supporting a rotor that rotates in response to wind, a tower rotatably supporting the nacelle, and the nacelle rotating with respect to the tower. and an abnormality detection device for detecting an abnormality in the yaw actuators. The abnormality detection device compares the total value of the outputs of the yaw actuators with a predetermined first threshold, and determines the output of the yaw actuator. If the total value exceeds the predetermined first threshold value, it is determined that the yaw actuator is abnormal, some of the plurality of yaw actuators are stopped, and based on the total value of the outputs of the yaw actuators in operation. The present invention is characterized by comprising an abnormality determination unit that determines a yaw actuator having an abnormality .
A wind power generation system according to the present invention includes a nacelle that supports a rotor that rotates in response to wind, a tower that rotatably supports the nacelle, and a plurality of yaw actuators that rotate the nacelle with respect to the tower. A plurality of wind power generators are provided, and an abnormality detection device for detecting an abnormality in the yaw actuator is provided. The abnormality detection device compares a total output value of each yaw actuator with a predetermined first threshold value, exceeds the predetermined first threshold value, it is determined that the yaw actuator is abnormal, some of the plurality of yaw actuators are stopped, and based on the total value of the outputs of the yaw actuators in operation, and an abnormality determination unit that determines a yaw actuator having an abnormality .

Advantageous Effects of Invention According to the present invention, it is possible to provide a wind turbine generator and a wind turbine generator system capable of early determination of an abnormality in the yaw actuator.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is an overall schematic configuration diagram of a wind power generation system according to an embodiment of the present invention; FIG. 2 is a perspective view showing the vicinity of the tower top of the wind turbine generator shown in FIG. 1. FIG. FIG. 2 is a side view showing the vicinity of the tower top of the wind turbine generator shown in FIG. 1; 1 is a block diagram of a yaw actuator and an abnormality detection device according to Embodiment 1; FIG. 2 is a functional block diagram of the control device shown in FIG. 1; FIG. 5 is a partial cross-sectional view showing a yaw actuator and a power cutoff mechanism shown in FIG. 4; FIG. 7 is a schematic diagram showing a state of transmission of rotational power from the output shaft shown in FIG. 6 to a pinion gear; FIG. FIG. 7 is a schematic diagram showing a non-transmission state of rotational power from the output shaft shown in FIG. 6 to a pinion gear; 6 is a flowchart of the abnormality detection device shown in FIG. 5; FIG. 10 is a flowchart showing a detailed flow of a yaw actuator abnormal point detection sequence shown in FIG. 9; FIG. FIG. 2 is an overall schematic configuration diagram of a wind power generation system of Example 2 according to another example of the present invention; 12 is a functional block diagram of the control device shown in FIG. 11; FIG. 13 is a flowchart of the abnormality detection device shown in FIG. 12;

In this specification, a downwind-type wind power generator will be described as an example of a wind power generator that constitutes a wind power generation system according to an embodiment of the present invention, but the present invention can be similarly applied to an upwind-type wind power generator. . Moreover, the wind power generators that constitute the wind power generation system according to the embodiment of the present invention can be installed anywhere on the ocean, in the mountains, or in the plains.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Wind power generation system>
FIG. 1 is an overall schematic configuration diagram of a wind power generation system according to an embodiment of the present invention. As shown in FIG. 1, the wind power generation system 1 includes a wind power generator 2, an electronic terminal 5 installed in the operation management center 3, a controller 29 installed in the wind power generator 2, which will be described later in detail, and an electronic It is composed of a communication network 6 that connects the terminal 5 and the control device 29 so that they can communicate with each other. Here, the communication network 6 may be wired or wireless.

<Wind power generator>
As shown in FIG. 1 , the wind turbine generator 2 includes blades 24 that rotate with wind, a hub 23 that supports the blades 24 , a nacelle 22 , and a tower 21 that rotatably supports the nacelle 22 . In the nacelle 22, there are a main shaft 25 connected to the hub 23 and rotating together with the hub 23, a gearbox 26 connected to the main shaft 25 and increasing the rotational speed, and a rotor driven at the rotational speed increased by the gearbox 26. It has a generator 27 that rotates to generate power. A portion that transmits the rotational energy of the blades 24 to the generator 27 is called a power transmission section, and in this embodiment, the main shaft 25 and the gearbox 26 are included in the power transmission section. A rotor is composed of the blades 24 and the hub 23 . As shown in FIG. 1, a power converter 28 for converting the frequency of power, a switching switch and transformer (not shown) for switching current, and a control device are installed at the bottom (lower part) in the tower 21. 29 etc. are arranged.

As the control device 29, for example, a control panel or SCADA (Supervisory Control And Data Acquisition) is used.
In this embodiment, an example in which the rotor is composed of three blades 24 and a hub 23 is shown, but this is not restrictive, and the rotor may be composed of a hub and at least one blade 24 .

The sensors 4 installed in the wind turbine generator 2 include, for example, an anemometer installed on top of the nacelle 22, a pitch angle sensor installed at the base of the blades 24 to measure the pitch angle of the blades 24, and an azimuth angle of the nacelle 22. and a strain sensor that measures the stress applied to the blade 24 . Although not shown, the sensors 4 include, for example, a thermometer installed above the nacelle 22 to measure the outside air temperature, a thermometer to measure the temperature inside the nacelle 22, and a hygrometer to measure the humidity inside the nacelle 22. It is good also as a structure containing. Further, the configuration may include a sensor (not shown) for measuring the number of rotations of the generator 27, the amount of power generation, and the like. In addition, it is not restricted to the structure which installs all the above-mentioned sensors.

The control device 29 acquires measurement data from the wind speed and direction meter, pitch angle sensor, yaw angle sensor, and various sensors 4 described above via signal lines, and based on the acquired measurement data, adjusts the pitch angle, nacelle The azimuth angle, generator rotation speed, etc. are appropriately controlled, and the acquired measurement data is transmitted to the electronic terminal 5 installed in the operation management center 3 via the communication network 6 .

2 is a perspective view showing the vicinity of the tower top of the wind turbine generator shown in FIG. 1, and FIG. 3 is a side view showing the vicinity of the tower top of the wind turbine generator shown in FIG. In FIGS. 2 and 3, the nacelle 22 is shown in a see-through form so that the state near the top of the tower 21 can be easily understood. A yaw bearing gear 9 and a plurality of yaw actuators 10 are provided at the connecting portion of the tower 21 and the nacelle 22 to control the positions of the nacelle 22 and the rotor or hub 23 and the plurality of blades 24 with respect to the tower 21. (yaw angle control mechanism). A yaw bearing gear 9 is provided at the top of the tower 21 and a plurality of yaw actuators 10 are provided within the nacelle 22 . The number of yaw actuators 10 to be installed depends on the type and scale of the wind turbine generator 2, but for example, about 4 units are installed when the power generation amount (output) is about 2 MW, and about 8 units are installed for a scale of about 5 MW. It is installed so as to surround the top. A case where eight yaw actuators 10 are installed will be described below as an example.
As shown in FIG. 3 , the yaw actuator 10 includes a drive motor 13 that serves as a power source for yaw driving (yaw turning), a speed reducer 12 that transmits the driving force of the drive motor 13 to the pinion gear 11 , and a yaw bearing gear 9 . A pinion gear 11 provided to mesh is connected.

FIG. 4 is a block diagram of a yaw actuator and an abnormality detection device according to this embodiment. A yaw power control section 14 and a power cutoff mechanism section 15 are connected to the eight yaw actuators 10, respectively. The yaw power control unit 14 is a device that outputs an operation signal to the yaw actuator 10, and is composed of an inverter. The inverter includes, for example, a full bridge circuit (not shown), and the full bridge circuit switches a DC voltage source (not shown) in response to a drive signal input from a PWM control section (not shown) to switch the yaw actuator. A current is output to a drive motor 13 that constitutes 10 . The full bridge circuit has four switching elements, a first upper and lower arm (U phase) having two switching elements connected in series and a second upper and lower arm (V phase) having two switching elements. Configure. The switching element can perform a switching operation according to a pulse-shaped gate signal output by a gate driver circuit (not shown) based on a drive signal generated by the PWM control section.

A power cutoff mechanism 15, which will be described later in detail, is a device that operates a clutch mechanism built in the yaw actuator 10, and is composed of a hydraulic unit. It has a function of cutting off the power of the yaw actuator 10 by controlling the hydraulic pressure with the hydraulic unit. The output measurement unit 16 measures the current value of the inverter that is the yaw power control unit 14 . Instead of measuring the current value of the inverter, for example, other parameters such as torque, vibration, and strain may be measured.
The output calculation unit 31 inputs the current values measured by the output measurement units 16 , obtains the total value, and outputs it to the abnormality determination unit 32 . The abnormality determination section 32 , which will be described later in detail, outputs a control signal to the yaw power control section 14 and the power cutoff mechanism section 15 based on the total value input from the output calculation section 31 . An abnormality detection device is configured by the output calculation unit 31 and the abnormality determination unit 32 .

Here, the yaw actuator 10 and the power cutoff mechanism 15 will be described.
<Yaw Actuator and Power Cutoff Mechanism>
FIG. 6 is a partial cross-sectional view showing the yaw actuator 10 and the power cutoff mechanism 15 shown in FIG. As shown in FIG. 6 , the yaw actuator 10 is connected to a drive motor 13 having a power shaft 44 and a speed reducer 12 that is connected to each of the power shaft 44 and the pinion gear 11 and that transmits power from the power shaft 44 to the pinion gear 11 . and
The power cutoff mechanism unit 15 includes a clutch control unit 90 to which a control signal is input from an abnormality determination unit 32 described later in detail, and a clutch hydraulic pressure source 94 driven by a hydraulic motor 252 . The clutch control unit 90 has a pressure regulating valve 90a and an energization controller 90b. The power cutoff mechanism 15 also has a relief valve 98 , an accumulator 95 , and a drain valve 99 that are sequentially connected to the clutch hydraulic pressure source 94 via a hydraulic pressure supply path 93 . A hydraulic supply path 93 connecting the clutch hydraulic pressure source 94 and the relief valve 98 is branched in the middle. A clutch hydraulic pressure source 94 and a pressure regulating valve 90a are connected via 93. A drain valve 199 is provided in the hydraulic supply path 93 on the downstream side of the pressure regulating valve 90a.

[Decelerator]
The speed reducer 12 includes an input gear 43 connected to a power shaft 44 of the drive motor 13, a plurality of spur gears 53 meshing with the input gear 43, a plurality of crankshafts 50 fixed to each of the plurality of spur gears 53, and a clutch operating. It has a pinion gear 11 that is connected to the output shaft 66 via a portion 89 . Further, the speed reducer 12 includes a case 40 having internal teeth 42 on the inner peripheral side (inner peripheral surface), an external gear 45 having external teeth 46 meshing with the internal teeth 42 of the case 40, and a carrier holding the external gear 45. 60 and a pinion gear 11 connected to the carrier 60 via a clutch actuation portion 89 and an output shaft 66 . The case 40 is formed in a cylindrical shape and accommodates an input gear 43 , multiple spur gears 53 , multiple crankshafts 50 (shaft bodies 51 ), an external gear 45 and a carrier 60 inside. The external gear 45 rotatably holds a plurality of crankshafts 50 via an external tooth bearing (not shown), and rotates the crankshafts 50 according to the rotation of the input gear 43 and the spur gears 53 . Acts as an oscillating gear. The carrier 60 rotatably holds each crankshaft 50 and also holds the external gear 45 via a plurality of crankshafts 50 .

In the speed reducer 12 , the rotational power input from the drive motor 13 to the input gear 43 is reduced in rotation and output from the pinion gear 11 . A pinion gear 11 is arranged to mesh with the yaw bearing gear 9 . Therefore, the rotational power transmitted to the pinion gear 11 via the input gear 43 and the speed reducer 12 is output to the yaw bearing gear 9 as yaw driving force with increased torque.

In FIG. 6, the symbol "L1" indicates the central axis of the pinion gear 11. As shown in FIG. The central axis of the inner peripheral surface of the case 40 on which the internal teeth 42 are provided is coaxial with the central axis L1. In the following description, a direction simply expressed as "axial direction" means a direction extending along the central axis L1 or a direction parallel to the central axis L1. Further, the direction perpendicular to the central axis L1 is called "radial direction", and the direction around the central axis L1 is called "circumferential direction".
The case 40 has a main case portion 41a formed in a cylindrical shape and having both ends opened, and a sub-case portion 41b fixed to one end side of the main case portion 41a. In this embodiment, the main case portion 41a and the sub case portion 41b are connected by fixing the edge portion of the main case portion 41a and the edge portion of the sub case portion 41b with bolts (not shown). An output shaft 66 protrudes from the other end of the main case portion 41a opposite to the one end to which the sub-case portion 41b is attached.

The internal teeth 42 are composed of a plurality of pin-shaped internal teeth pins. These internal teeth pins are fitted into pin grooves formed in a plurality of circumferentially equidistant intervals over the entire inner peripheral surface of the input side portion 111 of the main case portion 41a. It is arranged so as to be parallel to the axis L1. The internal teeth 42 having such a configuration are arranged to mesh with the external teeth 46 of the external gear 45 .
A drive motor 13 is attached to the sub-case portion 41 b of the case 40 . A power shaft 44 of the drive motor 13 extends toward the inside of the sub-case portion 41b, and is fixedly connected to an input gear 43 arranged in the sub-case portion 41b. It is transmitted to the input gear 43 via the shaft 44 .

The carrier 60 includes a first holding portion 61 that rotatably holds one end of the crankshaft 50 (the end on the side of the input gear 43 and the spur gear 53), and the other end of the crankshaft 50 (on the side from which the pinion gear 11 projects). a second holding portion 62 that rotatably holds the second holding portion 62, a column 63 that connects the first holding portion 61 and the second holding portion 62, and a coupling cylinder portion 64 for connecting the carrier 60 to the output shaft 66. have For convenience of explanation, the strut 63 is indicated by a chain double-dashed line in FIG.

The first holding portion 61 and the second holding portion 62 are each formed in an annular shape, and the first holding portion 61 and the second holding portion 62 are arranged to face each other at positions spaced apart along the axial direction. The strut 63 is provided so as to straddle between a substantially radial central region of the first holding portion 61 and a substantially radial central region of the second holding portion 62, and is provided to bridge the first holding portion 61 and the second holding portion 61. 62 is connected. The coupling tubular portion 64 is provided so as to straddle between the inner peripheral edge of the first holding portion 61 and the inner peripheral edge of the second holding portion 62, has a cylindrical shape, and has a carrier-side spline portion 65 on the inner peripheral surface. is formed.
A first end through hole 71 is formed in the first holding portion 61 , and one end of the crankshaft 50 is rotatably held in the first end through hole 71 via a first crankshaft bearing 73 . It is A second end through hole 72 is formed in the second holding portion 62 , and the other end of the crankshaft 50 is rotatable to the second end through hole 72 via a second crankshaft bearing 74 . is held in

The carrier 60 of this embodiment is divided into two in the axial direction, and is composed of a first half 60a arranged on the side of the sub-case portion 41b and a second half 60b arranged on the side from which the pinion gear 11 protrudes. ing. The first half body 60 a has the above-described first holding portion 61 , a first column half portion forming a portion of the column 63 , and a first cylinder half portion 64 a forming a portion of the coupling cylinder portion 64 . On the other hand, the second half 60b has the above-described second holding portion 62, a second strut half that forms part of the strut 63, and a second cylinder half 64b that forms part of the coupling cylinder 64. .

[Clutch mechanism]
As shown in FIG. 6 , the clutch mechanism includes a clutch operating section 89 and a clutch driving body 91 and operates under the control of a clutch control section 90 that constitutes the power cutoff mechanism section 15 . The clutch control section 90 can drive and control the clutch operating section 89 and the clutch driving body 91 by any power such as pneumatic system and hydraulic system. For example, in the yaw actuator 10 shown in FIG. 6, the clutch operating portion 89 and the clutch driving body 91 are driven and controlled by hydraulic power. In the example shown in FIG. 6, the clutch hydraulic pressure source 94 and the clutch control unit 90 are installed separately from the yaw actuator 10, and the clutch hydraulic pressure source 94 and the clutch are controlled by a hydraulic supply passage 93 filled with a liquid transmission medium such as oil. A control unit 90 and a clutch driver 91 are connected. The clutch driving body 91 is provided so as to be movable in the axial direction by being pushed by a liquid transmission medium. state) is changed. The clutch control unit 90 adjusts the pressure of the liquid transmission medium in the hydraulic supply path 93 (especially between the clutch control unit 90 and the clutch drive unit 91) to adjust the pressing force of the clutch drive unit 91 against the clutch actuation unit 89. It can be varied and controls the on/off of the clutch of clutch actuator 89 .

The clutch operating portion 89 has a first friction plate 89a spline-connected to the output shaft 66 and a second friction plate 89b spline-connected to the pinion gear 11 . The first friction plate 89a and the second friction plate 89b are constrained by the output shaft 66 and the pinion gear 11, respectively, with respect to their behavior in the direction of rotation about the central axis L1. 11 is provided so as to be movable without being constrained. However, the behavior of the first friction plates 89a and the second friction plates 89b in the direction of the central axis L1 is restrained by the clutch driving body 91 and the first connecting member 107 provided below the first friction plates 89a and the second friction plates 89b. This prevents the first friction plate 89a and the second friction plate 89b from coming off.
The first connecting member 107 is attached to the tip of the output shaft 66 via a screw member 107 a and arranged inside the clutch driving body 91 . The outer peripheral portion of the first connecting member 107 slightly protrudes from the output shaft 66 in the direction perpendicular to the central axis L1 and is arranged below the first friction plate 89a and the second friction plate 89b. The outer peripheral portion of the first connecting member 107 is configured so that the first friction plates 89a and the second friction plates 89b supported by the first connecting member 107 are not pressed against each other, so that the first friction plates 89a and the second friction plates 89a and 89b are separated from each other. It is arranged at a position where no frictional force is generated between it and 89b.

The clutch driving body 91 is provided inside the pinion gear 11 and below the clutch operating portion 89 (the first friction plate 89a and the second friction plate 89b) so as to be movable in the direction of the central axis L1. A part of the lower portion of the clutch driving body 91 is notched, and an elastic member 92 is inserted into the notched portion of the clutch driving body 91 . The elastic member 92 shown in FIG. 6 is composed of a plate spring and held by the second connecting member 109 and the clutch driver 91 attached to the lower portion of the pinion gear 11 via a screw member 109a. The elastic member 92 utilizes its own elastic force to push the clutch driving body 91 against the clutch operating portion 89 (the first friction plate 89a and the second friction plate 89b). A pressing force is applied to the body 91 . It should be noted that the elastic member 92 may be configured by a disc spring instead of the leaf spring.

The hydraulic action portion 93 b has a liquid-tight structure by a sealing member such as an O-ring provided between the pinion gear 11 and the clutch driving body 91 , and communicates with the hydraulic supply passage 93 formed inside the pinion gear 11 . A hydraulic supply passage 93 formed in the pinion gear 11 communicates with a hydraulic supply passage 93 formed in the second connecting member 109, and the hydraulic supply passage 93 formed in the second connecting member 109 functions as a pressure regulating valve. It communicates with a hydraulic supply path 93 extending from 90a via a swivel joint. Therefore, the clutch hydraulic pressure source 94 and the hydraulic pressure application portion 93b are communicated via the hydraulic pressure supply passage 93. As shown in FIG.

7 is a schematic diagram showing a transmission state of rotational power from the output shaft to the pinion gear shown in FIG. 6, and FIG. 8 is a schematic diagram showing a non-transmission state of rotational power from the output shaft to the pinion gear shown in FIG. is. In addition, in FIGS. 7 and 8, in order to facilitate understanding of the operation mechanism, the display of each element is simplified, and the illustration of some elements is omitted.
When transmitting rotational power from the output shaft 66 to the pinion gear 11, the pressure regulating valve 90a shown in FIG. The pressure inside the hydraulic supply path 93 leading to the inside of the gear 11 is kept low. In this case, as shown in FIG. 7, the clutch driving body 91 is pushed up by the elastic member 92, and the first friction plate 89a and the second friction plate 89b are sandwiched between the clutch driving body 91 and the pinion gear 11. They are pressed against each other in the central axis L1 direction. As a result, the first friction plates 89a and the second friction plates 89b are frictionally engaged with each other to transmit the rotational power from the output shaft 66 to the pinion gear 11, and the pinion gear 11 moves the first friction plates 89a and the second friction plates 89b. , integrally rotates with the output shaft 66 .

On the other hand, when the rotational power is not transmitted from the output shaft 66 to the pinion gear 11, the pressure regulating valve 90a is opened to allow the liquid transmission medium to flow through the hydraulic supply passage 93, and the high-pressure liquid transmission medium is allowed to flow. It is sent from the clutch hydraulic pressure source 94 to the hydraulic pressure supply path 93 inside the pinion gear 11 . Then, a high-pressure liquid transmission medium flows into the hydraulic action portion 93b from the hydraulic supply passage 93 in the pinion gear 11, and is separated from the first friction plate 89a and the second friction plate 89b against the elastic force of the elastic member 92. The clutch driving body 91 moves in the direction to move. As a result, the mutual pressing force between the first friction plates 89a and the second friction plates 89b is reduced, the frictional engagement between the first friction plates 89a and the second friction plates 89b is released, and the output shaft 66 rotates. Power is no longer transmitted to the pinion gear 11 . Therefore, even if the output shaft 66 and the first friction plate 89a rotate around the central axis L1, the second friction plate 89b and the pinion gear 11 basically do not rotate.

<Control device>
Next, the control device 29 shown in FIG. 1 will be described. FIG. 5 is a functional block diagram of the control device 29 shown in FIG. As shown in FIG. 5, the control device 29 includes an output calculation unit 31, an abnormality determination unit 32, a storage unit 33, a device control unit 34, a communication I/F 36, an input I/F 37, and an output I/F 38. are connected to each other via an internal bus 39 so as to be accessible. The output calculation unit 31, the abnormality determination unit 32, and the device control unit 34 include, for example, a processor such as a CPU (Central Processing Unit) (not shown), a ROM for storing various programs, a RAM for temporarily storing data in the calculation process, It is realized by a storage device such as an external storage device, and a processor such as a CPU reads and executes various programs stored in a ROM, and stores the calculation results, which are the execution results, in a RAM or an external storage device.

The device control unit 34 acquires measurement data from sensors 4 such as an anemometer, a pitch angle sensor, a yaw angle sensor, and a strain sensor via the input I/F 37 and the internal bus 39 . The device control unit 34 controls the operation of the wind turbine generator 2 based on the acquired measurement data. For example, operation is continued while controlling parameters such as the orientation and rotation speed of the blades 24 based on wind speed data. Specifically, based on wind direction data measured by an anemometer, output I to the yaw power control unit 14 that constitutes the yaw angle control mechanism so that the rotor composed of the blades 24 and the hub 23 faces the wind direction. /F38 to output a yaw angle control signal and/or output a pitch angle control signal, which is the inclination angle of the blades 24, to the pitch angle control mechanism 17 based on the wind speed data measured by the anemometer. Output via I/F38. In addition, based on the amount of power generated by the generator 27 measured by the sensor 4 , the device control unit 34 outputs a rotation speed control signal for controlling the rotation speed of the generator to the speed increaser 26 via the output I/F 38 .

The output calculation unit 31 acquires the current value of the inverter, which is the yaw power control unit 14 , measured by the output measurement unit 16 corresponding to each yaw actuator 10 via the input I/F 37 and the internal bus 39 . The output calculation unit 31 adds the obtained current values of the inverters corresponding to the respective yaw actuators 10 and transfers the total output value to the abnormality determination unit 32 via the internal bus 39 .
The abnormality determination unit 32 compares the sum of the outputs transferred from the output calculation unit 31 with a predetermined first threshold to determine whether the yaw actuator 10 is abnormal. Further, when an abnormality of the yaw actuator 10 is detected in a process to be described in detail later, the abnormality determination section 32 stops a specific yaw actuator 10, so that the power cutoff mechanism section 15 corresponding to the yaw actuator 10 to be stopped is activated. A control signal is output to the output I/F 38 . In this case, as described above, the power cutoff mechanism 15 opens the pressure regulating valve 90a by the energization controller 90b constituting the power cutoff mechanism 15 to allow the liquid transmission medium to flow through the hydraulic supply passage 93. A high pressure liquid transmission medium is sent from the clutch hydraulic source 94 to the hydraulic supply passage 93 in the pinion gear 11 . Then, as shown in FIG. 8, the clutch mechanism operates, the friction engagement between the first friction plate 89a and the second friction plate 89b is released, and the rotational power of the output shaft 66 is no longer transmitted to the pinion gear 11. . In other words, the power cutoff mechanism 15 cuts off the power of the yaw actuator 10 to be stopped. The abnormality determination unit 32 transmits the result of the abnormality determination of the yaw actuator 10 to the electronic terminal 5 installed in the operation management center 3 via the communication I/F 36 and the communication network 6 .
An abnormality detection device 30 is configured by the output calculation unit 31 and the abnormality determination unit 32 .

The storage unit 33 stores measurement data obtained by the sensor 4, such as an anemometer, a pitch angle sensor, a yaw angle sensor, and a strain sensor, in a predetermined storage area. store in In addition, the storage unit 33 stores a predetermined first threshold value and a predetermined second threshold value used by the abnormality detection device 30, which will be described later in detail, in a predetermined storage area.

The measurement data obtained by the sensors 4 such as an anemometer, a pitch angle sensor, a yaw angle sensor, and a strain sensor, which are acquired via the input I/F 37 and the internal bus 39, are sent to the operation management center as necessary. 3 via the communication I/F 36 and the communication network 6 to the electronic terminal 5 installed therein.

In this embodiment, the control device 29 shown in FIG. 5 is arranged at the bottom (lower part) of the tower 21, but the present invention is not limited to this. For example, a configuration in which a control panel is arranged in the nacelle 22 and a yaw angle command calculation section and a pitch angle command calculation section, which are part of the functions provided in the device control section 34, and/or the abnormality detection device 30 are mounted. Also good.

Next, operation of the abnormality detection device 30 will be described. A case will be described below in which eight yaw actuators 10 are installed on the outer peripheral side of the yaw bearing gear 9 at predetermined intervals in the circumferential direction. In other words, the actuators are spaced 45° from the center of the yaw bearing gear 9 in its circumferential direction. Although not shown, the yaw actuator 10a, the yaw actuator 10b, the yaw actuator 10c, the yaw actuator 10d, the yaw actuator 10e, the yaw actuator 10f, the yaw actuator 10g, and the yaw actuator 10h are arranged in sequence clockwise, for example. .

[Operation of abnormality detection device]
FIG. 9 is a flow chart of the abnormality detection device 30 shown in FIG.
In step S11, when the abnormality detection device 30 detects a yaw turning abnormality, the process proceeds to step S12. Here, the "yaw turning abnormality" is, for example, a yaw angle follow-up error with respect to a yaw angle control command, or an abnormality of the inverter as the yaw power control unit 14 that drives the drive motor 13 constituting the yaw actuator. .

In step S12, the abnormality determination unit 32 constituting the abnormality detection device 30 determines the sum of the outputs obtained by the output calculation unit 31 constituting the abnormality detection device 30 (current values of the inverters corresponding to the yaw actuators 10a to 10h). total value) and a predetermined first threshold value stored in the storage unit 33 are compared. As a result of the comparison, if the total output value is equal to or less than the predetermined first threshold value, the process proceeds to step S18, and the abnormality determination section 32 determines that an abnormality other than the yaw actuator has occurred. Then, in step S19, the wind turbine, that is, the wind turbine generator 2 is stopped, and the process ends. On the other hand, as a result of the comparison, if the total output value exceeds the predetermined first threshold value, the process proceeds to step S13.
Here, as the predetermined first threshold value, for example, the total value of the outputs (inverter current values) of the yaw actuators 10a to 10h during test operation in the factory, or is set to the sum of the outputs of the yaw actuators 10a to 10h. However, the present invention is not limited to this, and based on actual data stored in a database (not shown), that is, records of maintenance such as replacement of yaw actuators, the total output value of each yaw actuator during a predetermined period prior to maintenance is calculated. The average may be changed as the predetermined first threshold, and the first threshold set in advance as described above may be corrected based on the performance data.

In step S13, the abnormality determination unit 32 determines that at least one of the yaw actuators 10a to 10h has an abnormality.
In step S14, the abnormality determination unit 32 executes a yaw actuator abnormality location detection sequence. Details of the yaw actuator abnormal point detection sequence will be described later.

In step S15, the abnormality determination unit 32 determines whether or not the yaw actuator abnormality location has been detected in step S14. As a result of the determination, if the yaw actuator failure location could not be detected, the process proceeds to step S18 described above. On the other hand, as a result of the determination, if the yaw actuator abnormal location can be detected, the process proceeds to step S16.

In step S16, the abnormality determination unit 32 cuts off the power of the abnormal yaw actuator. Specifically, as described above, the abnormality determination section 32 outputs a control signal via the output I/F 38 to the power cutoff mechanism section 15 corresponding to the abnormal yaw actuator. The power cutoff mechanism 15 opens a pressure regulating valve 90a by an energization controller 90b constituting the power cutoff mechanism 15 to allow the liquid transmission medium to flow through the hydraulic supply passage 93. It is sent from the source 94 to the hydraulic supply passage 93 inside the pinion gear 11 . Then, as shown in FIG. 8, the clutch mechanism operates, the friction engagement between the first friction plate 89a and the second friction plate 89b is released, and the rotational power of the output shaft 66 is no longer transmitted to the pinion gear 11. . As a result, the power cutoff mechanism 15 cuts off the power of the abnormal yaw actuator. The abnormality determination unit 32 transmits information on the detected abnormal yaw actuator to the electronic terminal 5 installed in the operation management center 3 via the communication I/F 36 and the communication network 6 . Since the information of the abnormal yaw actuator is displayed on the display screen (not shown) of the electronic terminal 5, the worker (operator) can determine whether maintenance of the abnormal yaw actuator is required or whether parts for maintenance are required. Procurement and other arrangements can be made quickly.

In step S17, the abnormality determination unit 32 continues the operation with the yaw actuators other than the yaw actuator whose power is cut off, and ends the process. In other words, the abnormality determination unit 32 performs retraction operation with the yaw actuators except for the abnormal yaw actuator.

FIG. 10 is a flow chart showing the detailed flow of the yaw actuator abnormal point detection sequence shown in FIG.
In step S141, the abnormality determination unit 32 selects m yaw actuators from n (total number) yaw actuators. Here, as an example, n=8, that is, m yaw actuators are selected from the eight yaw actuators 10a to 10h. In this case, it is desirable that 1≦m≦3. Note that the total number n is not limited to eight, and may be set as appropriate, and the possible range of m in that case may be (1/8×n)≦m≦(3/8×n), for example. A case where m=3 will be described below as an example.

In step S142, the abnormality determination unit 32 stops m yaw actuators and performs yaw operation with (nm) yaw actuators. That is, the yaw actuators 10a to 10c, which are the three yaw actuators, are stopped by cutting off the power, and the inverters, which are the yaw power control units 14 corresponding to the remaining five yaw actuators 10d to 10h, are sent to the abnormality determination unit 32. Yaw operation is performed by outputting more control signals.

In step S143, the output calculation unit 31 outputs the current values of the inverter, which is the yaw power control unit 14, measured by the output measurement units 16 corresponding to the yaw actuators 10d to 10h via the input I/F 37 and the internal bus 39. to get. Then, the output calculation unit 31 adds the acquired current values of the inverters corresponding to the yaw actuators 10d to 10h, and transfers the total output value to the abnormality determination unit 32 via the internal bus 39. FIG.

In step S144, the abnormality determination unit 32 determines the total value of the outputs obtained by the output calculation unit 31 (the total value of the current values of the inverters corresponding to the yaw actuators 10d to 10h) and the predetermined value stored in the storage unit 33. A second threshold is compared. As a result of the comparison, if the total value of the outputs exceeds the predetermined second threshold, the process is terminated. That is, the process proceeds to step S15 in FIG. 9 described above.
On the other hand, as a result of the comparison, if the total value of the outputs is equal to or less than the predetermined second threshold, the process proceeds to step S145. Here, for example, (5/8)×(predetermined first threshold) is set as the predetermined second threshold.

In step S145, the abnormality determination unit 32 selects m different yaw actuators, and returns to step S142. Specifically, yaw actuators 10d to 10f are selected as three different yaw actuators. In step S142, the abnormality determination unit 32 cuts off the power to the yaw actuators 10d to 10f to stop them, and the yaw power control units 14 corresponding to the remaining five yaw actuators 10a to 10c and the yaw actuators 10g to 10h. Yaw operation is performed by outputting a control signal from the abnormality determination unit 32 to a certain inverter. By repeatedly executing the processing from steps S142 to S145 in this manner, the yaw actuator abnormal point detection sequence is executed.
In this embodiment, the total number of actuators is set to n=8 and m=3, so the yaw actuators 10g to 10h may be selected as the two actuators in step S145. In this case, the yaw actuators 10a to 10f, which are the remaining six yaw actuators, are yaw-operated, and the predetermined second threshold value compared with the total output value in step S144 is, for example, (6/8). x (predetermined first threshold).

By setting m=3 as in the present embodiment, the group (group) including the yaw actuator in the abnormal state is determined early, and when the yaw actuator in the abnormal state is identified, it is determined to be abnormal. By sequentially stopping the m yaw actuators forming the set (group) one by one and performing the same determination, the yaw actuator in the abnormal state can be identified. Of the yaw actuators spaced apart at a predetermined interval, instead of the three yaw actuators that are continuously adjacent as described above, they are installed at symmetrical positions in the circumferential direction of the yaw bearing gear 9. An actuator may be selected and stopped.
When m=1, the yaw actuator in the abnormal state can be identified by repeating the above-described steps S142 to S145 at most eight times.

Strictly speaking, the load applied to the plurality of yaw actuators, which are installed on the outer peripheral side of the yaw bearing gear 9 at predetermined intervals in the circumferential direction, depends on the wind conditions (wind direction and wind speed). different. However, as shown in FIGS. 9 and 10, by using the total value of the outputs of the yaw actuators during yaw operation (the total value of the current values of the inverters corresponding to the yaw actuators), the influence of wind conditions can be Actuator failure can be determined. In other words, by using the total output value of the yaw actuators to make an abnormality determination, even if different loads are applied to the yaw actuators, it is possible to make a determination without considering the effects of the load. Become.

In this embodiment, in the flow chart shown in FIG. 9, when the yaw turning abnormality is detected in step S11, the process proceeds to step S12. The configuration may be such that the processes from step S12 to step S19 are executed at a predetermined cycle.

Moreover, the wind turbine generator and the wind turbine generator system according to the present embodiment can be similarly applied to a wind farm having a plurality of wind turbine generators.

As described above, according to this embodiment, it is possible to provide a wind turbine generator and a wind turbine generator system that can quickly determine an abnormality in the yaw actuator.
Further, according to the present embodiment, even if different loads are applied to the yaw actuators depending on the wind conditions (wind direction and wind speed), it is possible to make a determination without considering the influence thereof.

FIG. 11 is an overall schematic configuration diagram of a wind power generation system of Example 2 according to another example of the present invention. In the first embodiment, the total value of the outputs of a plurality of yaw actuators installed in one wind turbine generator 2 is compared with a predetermined first threshold value to determine an abnormality. Targeting a wind farm where multiple wind turbines are installed, abnormalities are determined by relatively comparing the output of multiple yaw actuators installed in each of two adjacent wind turbines in the wind farm. It differs from the first embodiment in that Components similar to those of the first embodiment are denoted by the same reference numerals, and descriptions overlapping those of the first embodiment are omitted below.

As shown in FIG. 11, the wind power generation system 1a according to the present embodiment includes a plurality of wind power generators (2a, 2b, . . . 2n), an electronic terminal 5 installed in the operation management center 3, and It is composed of a control device 29a installed in the wind turbine generator (2a, 2b, . . . 2n), and a communication network 6 connecting the electronic terminal 5 and the control device 29a so as to be able to communicate with each other. Here, the communication network 6 may be wired or wireless. Sensors 4 installed in each of the wind turbine generators (2a, 2b, . Since it is the same as Example 1, the description is omitted. Further, the configurations of the yaw power control unit 14 and the power cutoff mechanism unit 15 are also the same as those of the first embodiment, and thus description thereof is omitted.
Generally, in a wind farm, the wind passing through the wind power generator located on the windward side changes in wind conditions such as wind direction and wind speed due to the rotation of the rotor that constitutes the wind power generator located on the windward side. It is propagated to the wind turbine generator located on the leeward side. In this way, the flow of the wind propagated to the wind power generator located on the leeward side and whose wind conditions have changed is called a wind turbine wake (also referred to as a wake). Note that the wind conditions that change when passing the wind power generator located on the windward side are not limited to the wind direction and wind speed, and include turbulence characteristics, eddy shapes, and the like, which are how the wind is turbulent. The wind turbine wake (wake) flows to the leeward side while spreading after passing through the wind turbine generator located on the windward side. That is, the wind turbine wake propagates to the leeward side while diffusing and generating a vortex (turbulent flow).

FIG. 12 is a functional block diagram of the control device 29a shown in FIG. Here, it is assumed that the control device 29a shown in FIG. 12 is a control device installed in the wind turbine generator 2a. As shown in FIG. 12, the control device 29a includes an output calculation unit 31, an abnormality determination unit 32, a storage unit 33, a device control unit 34, a normalization processing unit 35, a communication I/F 36, an input I/F 37, and an output I/F. /F 38 , which are connected to each other via an internal bus 39 so as to be accessible. The output calculation unit 31, the abnormality determination unit 32, the device control unit 34, and the normalization processing unit 35 store, for example, a processor such as a CPU (Central Processing Unit) (not shown), a ROM that stores various programs, and temporarily store data in the calculation process. A processor such as a CPU reads out and executes various programs stored in ROM, and the result of execution is stored in RAM or an external storage device. Store.

The device control unit 34 acquires measurement data from sensors 4 such as an anemometer, a pitch angle sensor, a yaw angle sensor, and a strain sensor via the input I/F 37 and the internal bus 39 . The device control unit 34 controls the operation of the wind turbine generator 2 based on the acquired measurement data. For example, operation is continued while controlling parameters such as the orientation and rotation speed of the blades 24 based on wind speed data. Specifically, based on wind direction data measured by an anemometer, output I to the yaw power control unit 14 that constitutes the yaw angle control mechanism so that the rotor composed of the blades 24 and the hub 23 faces the wind direction. /F38 to output a yaw angle control signal and/or output a pitch angle control signal, which is the inclination angle of the blades 24, to the pitch angle control mechanism 17 based on the wind speed data measured by the anemometer. Output via I/F38. In addition, based on the amount of power generated by the generator 27 measured by the sensor 4 , the device control unit 34 outputs a rotation speed control signal for controlling the rotation speed of the generator to the speed increaser 26 via the output I/F 38 .

The normalization processing unit 35 calculates the current value of the inverter, which is the yaw power control unit 14, measured by the output measurement unit 16 corresponding to each yaw actuator 10 installed in the wind turbine generator 2a (first wind turbine generator). is acquired via the input I/F 37 and the internal bus 39 . Furthermore, the normalization processing unit 35 measures the yaw power measured by the output measuring unit 16 corresponding to each yaw actuator 10 installed in, for example, the wind power generator 2b (second wind power generator) adjacent to the wind power generator 2a. A current value of the inverter, which is the power control unit 14, is obtained via the communication network 6, the input I/F 37 and the internal bus 39.
As described above, the wind power generator 2a (first wind power generator) and the wind power generator 2b (second wind power generator) adjacent to each other have different wind conditions, and the wind power generator located on the leeward side changes. 2b (second wind turbine generator) is also affected by the wake of the wind turbine. Therefore, the load applied to each yaw actuator 10 installed in the wind turbine generator 2a (first wind turbine generator) and the load applied to the wind turbine generator 2b (second wind turbine generator) positioned on the leeward side It is different from the load applied to each yaw actuator 10 . The amplitude of the current of the inverter corresponding to the yaw actuator 10 tends to increase as the applied load increases. Therefore, the normalization processing unit 35 calculates the obtained current value of the inverter corresponding to each yaw actuator 10 of the wind turbine generator 2a (first wind turbine generator) and the adjacent wind turbine generator 2b (second wind turbine generator). ), the current value of the inverter corresponding to each yaw actuator 10 is normalized based on, for example, the peak level of the amplitude of the current value. The normalization processing unit 35 calculates the current value of the inverter of the wind turbine generator 2a (first wind turbine generator) after the normalization process and the current value of the adjacent wind turbine generator 2b (second wind turbine generator) after the normalization process. The current value of the inverter is transferred to the output calculation section 31 and the abnormality determination section 32 via the internal bus 39 .

The output calculation unit 31 adds the current values of the inverters corresponding to the yaw actuators 10 of the wind turbine generator 2a (first wind turbine generator) after the normalization process transferred from the normalization processor 35, and calculates wind power generation. The total value of the outputs of the yaw actuators 10 of the device 2a (first wind turbine generator) is transferred to the abnormality determination section 32 via the internal bus 39 . Further, the output calculation unit 31 adds the current values of the inverters corresponding to the yaw actuators 10 of the adjacent wind turbine generator 2b (second wind turbine generator) after normalization transferred from the normalization processor 35. Then, the sum of the outputs of the yaw actuators 10 of the wind power generator 2b (second wind power generator) is transferred to the abnormality determination unit 32 via the internal bus 39. FIG.
The abnormality determination unit 32 determines the current value profile (normalization process Output profile of each yaw actuator of the wind turbine generator 2a (first wind turbine generator) after normalization) and adjacent wind turbine generator 2b (second wind turbine generator) after normalization processing transferred from the normalization processing unit 35 power generator) of the inverter corresponding to each yaw actuator 10 (profile of each yaw actuator output of the adjacent wind power generator 2b (second wind power generator) after normalization). If the comparison results substantially match, it is determined that the yaw actuators 10 of both the wind turbine generator 2a (first wind turbine generator) and the adjacent wind turbine generator 2b (second wind turbine generator) are normal. On the other hand, if the comparison result shows variation, the wind turbine generator having the abnormal yaw actuator is specified.

Alternatively, the abnormality determination unit 32 determines the sum of the outputs of the yaw actuators 10 of the wind turbine generator 2a (first wind turbine generator) transferred from the output calculation unit 31 and the wind power generation transferred from the output calculation unit 31. is compared with the total value of the output of each yaw actuator 10 of the device 2b (second wind power generator), and if the comparison results substantially match, the wind power generator 2a (first wind power generator) and the adjacent The yaw actuators 10 of both the wind power generator 2b (second wind power generator) are determined to be normal. On the other hand, if the comparison result shows variation, the wind turbine generator having the abnormal yaw actuator is identified.
The abnormality detection device 30 a is composed of a normalization processing section 35 , an output calculation section 31 and an abnormality determination section 32 .

FIG. 13 is a flow chart of the abnormality detection device 30a shown in FIG. The operation of the abnormality detection device 30a that constitutes the control device 29a installed in the wind turbine generator 2a will be described below as an example.
In step S21, the abnormality detection device 30a sets two mutually adjacent wind power generators (a first wind power generator and a second wind power generator) in the wind farm. Here, it is assumed that the first wind turbine generator to be selected is the wind turbine generator 2a and the second wind turbine generator is the wind turbine generator 2b.

In step S22, the normalization processing unit 35 constituting the abnormality detection device 30a selects the yaw actuators of the selected first wind power generator (wind power generator 2a) and second wind power generator (wind power generator 2b). The current value of the inverter measured by the output measuring unit 16 corresponding to 10 is acquired.

In step S23, the normalization processing unit 35 calculates the current value of the inverter corresponding to each yaw actuator 10 of the first wind power generator (wind power generator 2a) and the acquired current value of the second wind power generator (wind power generator 2b). ), the current value of the inverter corresponding to each yaw actuator 10 is normalized based on, for example, the peak level of the amplitude of the current value. The normalization processing unit 35 calculates the current value of the inverter of the first wind power generator (wind power generator 2a) after the normalization process and the current value of the inverter of the second wind power generator (wind power generator 2b) after the normalization process. The current value is transferred to the abnormality determination section 32 via the internal bus 39 .

In step S24, the abnormality determination unit 32 determines the output profile of each yaw actuator after normalization between the first wind power generator (wind power generator 2a) and the second wind power generator (wind power generator 2b). compare. As a result of the comparison, if there is a change, the process proceeds to step S25 to identify the wind turbine generator having the abnormal yaw actuator and terminate the process.
On the other hand, as a result of the comparison, if they substantially match, the process proceeds to step S26.

In step S26, two wind power generators adjacent to each other are selected, the process returns to step S22, and the processes from steps S22 to S26 are executed for all wind power generators 2n in the wind farm.

Note that instead of step S24, the output calculation unit 31 performs the normalization processing of the inverters corresponding to the yaw actuators 10 of the first wind power generator (wind power generator 2a) transferred from the normalization processing unit 35. The current values are added, and the sum of the outputs of the yaw actuators 10 of the first wind power generator (wind power generator 2a) is transferred to the abnormality determination unit 32 via the internal bus 39 . In addition, the output calculation unit 31 adds the current values of the inverters corresponding to the yaw actuators 10 of the adjacent second wind power generator (wind power generator 2b) after the normalization processing transferred from the normalization processing unit 35. and transferred to the abnormality determination unit 32 via the internal bus 39 as the sum of the outputs of the yaw actuators 10 of the second wind power generator (wind power generator 2b). Then, the abnormality determination unit 32 determines the sum of the transferred outputs of the yaw actuators 10 of the first wind power generator (wind power generator 2a) and the yaw actuators of the second wind power generator (wind power generator 2b). A configuration may be used in which the total value of ten outputs is compared.

Further, the detailed flow of the yaw actuator abnormal point detection sequence shown in FIG. 10 in the first embodiment may be executed for the wind turbine generator having the abnormal yaw actuator identified in step S25.

In this embodiment, the abnormality detection device 30a constituting the control device 29a installed in one of the two wind power generators adjacent to each other executes the flow shown in FIG. However, it is not limited to this. For example, an abnormality detection device 30a may be mounted on the electronic terminal 5 installed in the operation management center 3, and the flow shown in FIG. 13 may be executed.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, even in a wind farm where a plurality of wind power generators are installed, it is possible to quickly identify a wind power generator having a yaw actuator in which an abnormality has occurred. It becomes possible.
Further, according to this embodiment, since the configuration is such that an abnormality is determined by relatively comparing the outputs of the plurality of yaw actuators installed in each of the two adjacent wind power generators in the wind farm, , it becomes possible to realize abnormality determination by relatively simple processing.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment.

DESCRIPTION OF SYMBOLS 1, 1a... Wind power generation system 2, 2a, 2b, 2n... Wind power generator 3... Operation management center 4... Sensor 5... Electronic terminal 6... Communication network 9... Yaw bearing gear 10... Yaw actuator 11... Pinion gear 12... Deceleration Machine 13 Drive motor 14 Yaw power control unit 15 Power cutoff mechanism 16 Output measurement unit 17 Pitch angle control mechanism 21 Tower 22 Nacelle 23 Hub 24 Blade 25 Main shaft 26 Gearbox 27 Generator 28 Power converters 29, 29a Control devices 30, 30a Abnormality detection device 31 Output calculation unit 32 Abnormality determination unit 33 Storage unit 34 Device control unit 35 Normalization processing unit 36 Communication I/ F.
37 Input I/F
38... Output I/F
39... Internal bus 40... Case 41a... Main case portion 41b... Sub case portion 42... Internal teeth 43... Input gear 44... Power shaft 45... External gear 46... External teeth 50... Crankshaft 51... Shaft body 53... Spur gear 60 Carrier 60a First half body 60b Second half body 61 First holding part 62 Second holding part 63 Column 64 Coupling cylinder part 64a First cylinder half part 64b Second cylinder half part 65 Carrier-side spline portion 66 Output shaft 71 First end through hole 72 Second end through hole 73 First crankshaft bearing 74 Second crankshaft bearing 89 Clutch operating portion 89a 1 friction plate 89b...second friction plate 90...clutch control section 90a...pressure regulating valve 90b...energization controller 91...clutch driver 92...elastic member 93...hydraulic supply path 93b...hydraulic action section 94...clutch hydraulic pressure source 95...accumulator 98... Relief valve 99... Drain valve 107... First connecting member 107a... Threaded member 109... Second connecting member 109a... Threaded member 111... Input side portion 199... Drain valve 252... Hydraulic motor

Claims (11)

a nacelle that supports a rotor rotating in the wind;
a tower that rotatably supports the nacelle;
a plurality of yaw actuators that rotate the nacelle with respect to the tower;
an abnormality detection device that detects an abnormality of the yaw actuator;
The abnormality detection device compares the total output value of each yaw actuator with a predetermined first threshold value, and determines that the yaw actuator is abnormal when the total output value exceeds the predetermined first threshold value. and an abnormality determination unit that stops some of the plurality of yaw actuators and determines which yaw actuator has an abnormality based on the total output value of the yaw actuators in operation . Wind power generator. In the wind turbine generator according to claim 1,
The abnormality determination unit stops some of the yaw actuators among the plurality of yaw actuators, and if a total output value of the yaw actuators in operation exceeds a predetermined second threshold value, the yaw actuator in operation is abnormal. A wind power generator characterized by determining that. In the wind turbine generator according to claim 2,
The abnormality determination unit sequentially stops some of the yaw actuators among the plurality of yaw actuators, compares a total value of outputs of the yaw actuators in operation with the predetermined second threshold value, and determines that there is an abnormality. A wind turbine generator characterized by specifying a yaw actuator . In the wind turbine generator according to claim 2 or claim 3,
The wind turbine generator , wherein the predetermined second threshold is smaller than the predetermined first threshold . In the wind turbine generator according to claim 4,
The predetermined second threshold is set by multiplying the predetermined first threshold by a ratio of the number of the partial yaw actuators to be stopped to the total number of the plurality of yaw actuators. Device. In the wind turbine generator according to claim 5,
The predetermined first threshold includes at least the total value of each yaw actuator during test operation in a factory, the total value of output of each yaw actuator during test operation when installing the wind turbine generator, and the replacement of the yaw actuator. A wind power generator characterized in that it is one of the averages of the total values of outputs of each yaw actuator during a predetermined period prior to maintenance based on a maintenance record including: a plurality of wind turbine generators each having a nacelle for supporting a rotor that rotates under wind, a tower for rotatably supporting the nacelle, and a plurality of yaw actuators for rotating the nacelle with respect to the tower; Equipped with an anomaly detection device that detects anomalies in
The abnormality detection device compares a total output value of each yaw actuator with a predetermined first threshold value, and determines that the yaw actuator is abnormal when the total output value exceeds the predetermined first threshold value, The wind power generator, further comprising : an abnormality determination unit that stops some of the plurality of yaw actuators and determines an abnormal yaw actuator based on a total value of outputs of the yaw actuators in operation. system. In the wind power generation system according to claim 7,
The abnormality determination unit stops some of the yaw actuators among the plurality of yaw actuators, and if a total output value of the yaw actuators in operation exceeds a predetermined second threshold value, the yaw actuator in operation is abnormal. A wind power generation system characterized by determining that In the wind power generation system according to claim 8,
The abnormality determination unit sequentially stops some of the yaw actuators among the plurality of yaw actuators, compares a total output value of the yaw actuators in operation with the predetermined second threshold value, and determines whether an abnormality has occurred. A wind power generation system characterized by identifying a certain yaw actuator. In the wind power generation system according to claim 8 or claim 9,
The wind power generation system, wherein the predetermined second threshold is smaller than the predetermined first threshold . In the wind power generation system according to claim 10,
The predetermined second threshold is set by multiplying the predetermined first threshold by a ratio of the number of the partial yaw actuators to be stopped to the total number of the plurality of yaw actuators. power generation system.

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