TWI768257B - Wind power plant and wind power system - Google Patents

Abstract

The present invention provides a wind power generation device and a wind power generation system capable of early determination of an abnormality of a yaw actuator. The wind power generator 2 includes a nacelle 22 that supports an impeller that is rotated by wind, a tower 21 that rotatably supports the nacelle 22, a plurality of yaw actuators 10 that rotate the nacelle 22 relative to the tower 21, And the abnormality detection device 30 which detects the abnormality of the yaw actuator 10. The abnormality detection device 30 compares the total value of the outputs of the yaw actuators 10 with a predetermined first threshold value, and determines that the yaw actuator 10 is abnormal when the total value of the outputs exceeds the predetermined first threshold value. .

Description

Wind power plant and wind power system

The present invention relates to a wind power generation device and a wind power generation system including a wind farm including a plurality of wind power generation devices, and more particularly, to a wind power generation device and a wind power generation system with a function of detecting abnormality of a yaw actuator.

In recent years, from the viewpoint of protecting the global environment, a wind power generating apparatus that generates power using wind power has attracted attention. Generally speaking, a wind power generator has an impeller formed by attaching a plurality of blades to a hub, and the generator is driven by the rotational energy of the impeller rotated by the wind. Generally, the wind conditions to which the wind turbine generator is subjected are different depending on the influence of the terrain and the like. If the actual wind conditions are more severe than the design assumptions, the variable load on the wind turbine will increase. Therefore, it is possible that the constituent parts of the wind power plant (such as blades, nacelles, towers and auxiliary equipment, etc.) are damaged earlier than the period assumed in the design, so that the replacement period is advanced. In the event of unforeseen damage, preparation for replacement of parts or preparation for replacement work takes time, so there is a concern that downtime will occur and the loss of power generation companies or manufacturers will increase.

For example, the technology described in Patent Document 1 has been proposed as a wind power generator capable of shortening the stop time of the power generation operation by discovering the abnormality of the reduction gear and carrying out planned repairs. Patent Document 1 discloses that a plurality of speed reducers constituting a yaw drive device and a motor connected to the speed reducers are provided, and an abnormality determination unit for judging an abnormality of the speed reducer uses the values of the motors measured by the respective electricity meters. The cumulative power consumption is compared, and when the difference between the cumulative power consumption of at least two motors is greater than or equal to a predetermined value, it is determined that the reducer corresponding to the motor with the smaller cumulative power consumption is in an abnormal state. In addition, Patent Document 1 describes the following: when there are three or more motors, the difference between every two accumulated power consumption is cyclically obtained for all the motors, and only one of the differences exceeds the When the specified threshold is reached, it is judged as abnormal. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2015-74998

[Problems to be Solved by Invention]

However, in the configuration disclosed in Patent Document 1, since the abnormality of the reducer is determined based on the difference between the accumulated power consumption of the two motors, it takes time to obtain the accumulated power consumption, so it is difficult to determine the speed reducer as soon as possible. abnormal. In view of this, the present invention provides a wind power generation device and a wind power generation system capable of early determination of an abnormality of a yaw actuator. [Technical means to solve problems]

In order to solve the above-mentioned problems, the wind power generator of the present invention is characterized by comprising: a nacelle for supporting the impeller that is rotated by the wind; a tower for rotatably supporting the nacelle; and a plurality of yaw actuators for enabling The nacelle rotates relative to the tower; and an abnormality detection device detects an abnormality of the yaw actuator; and the abnormality detection device compares the sum of the outputs of the yaw actuators with a predetermined first threshold value. By comparison, if the total value of the above-mentioned outputs exceeds the above-mentioned predetermined first threshold value, it is determined that the yaw actuator is abnormal. Furthermore, the wind power generation system of the present invention is characterized by comprising a plurality of wind power generators including a nacelle for supporting an impeller that is rotated by the wind, and a tower for rotatably supporting the nacelle, and an abnormality detection device. A frame, and a plurality of yaw actuators for rotating the nacelle relative to the tower, the abnormality detection means detects the abnormality of the yaw actuator, and the abnormality detection means outputs the output of each yaw actuator The total value is compared with a predetermined first threshold value, and if the total value of the output exceeds the predetermined first threshold value, it is determined that the yaw actuator is abnormal. Further, another wind power generation system according to the present invention is characterized by comprising a plurality of wind power generators including a nacelle supporting an impeller that is rotated by wind, and supporting the nacelle in a rotatable manner, and an abnormality detection device. The tower, and a plurality of yaw actuators for rotating the nacelle relative to the tower, the abnormality detection device detects the abnormality of the yaw actuator, and the abnormality detection device at least two adjacent to the wind The total value of the output of the yaw actuators provided in the power generation device or the curves of the outputs of the yaw actuators provided by the two wind power generation devices are compared, and the above-mentioned two adjacent wind power generation devices are compared. When the total value of the output of each yaw actuator or the curve of the output of each yaw actuator described above changes, it is determined that the yaw actuator provided in one wind power generator is abnormal. [Effect of invention]

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

In this specification, the downwind type wind turbine generator is described as an example as the wind turbine generator constituting the wind turbine generator system according to the embodiment of the present invention, but the same can be applied to the downwind type wind turbine generator. Moreover, the wind power generator which comprises the wind power generation system of embodiment of this invention may be installed in any place of the ocean, a mountain part, and a plain part. Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Example 1]

＜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 generation device 2 , an electronic terminal 5 provided in the operation management center 3 , a control device 29 provided in the wind power generation device 2 described in detail below, and the electronic terminal 5 The communication network 6 is connected to the control device 29 so as to be able to communicate with each other. Here, the communication network 6 is not limited to wired or wireless.

＜Wind power generator＞ As shown in FIG. 1 , the wind power generator 2 includes blades 24 that are rotated by wind, a hub 23 that supports the blades 24 , a nacelle 22 , and a tower 21 that rotatably supports the nacelle 22 . The nacelle 22 includes: a main shaft 25 connected to the hub 23 and rotating together with the hub 23, a speed-up gear 26 connected to the main shaft 25 and increasing the rotational speed, and a rotor for increasing the rotational speed by the speed-up gear 26. A generator 27 that rotates to generate power. The part that transmits the rotational energy of the blades 24 to the generator 27 is called a power transmission part. In this embodiment, the power transmission part includes a main shaft 25 and a speed increaser 26 . In addition, the impeller is constituted by the blades 24 and the hub 23 . As shown in FIG. 1 , a power converter 28 for converting electric power frequency, a switch for switching and a transformer (not shown) for switching current, and a control device 29 are arranged at the bottom (lower part) of the tower 21 .

As the control device 29, for example, a console or SCADA (Supervisory Control And Data Acquisition) is used. In the present embodiment, an example in which the impeller is constituted by three blades 24 and the hub 23 is shown, but the impeller is not limited thereto, and the impeller may also include a hub and at least one blade 24 .

The sensor 4 provided in the wind power generation device 2 includes, for example: a wind direction anemometer provided on the upper part of the nacelle 22, a pitch angle sensor provided at the root of the blade 24 and measuring the pitch angle of the blade 24, a measuring A yaw angle sensor for the azimuth of the nacelle 22 , and a strain sensor for measuring the stress applied to the blades 24 . Furthermore, although not shown, the sensor 4 may include, for example, a thermometer disposed on the upper part of the engine room 22 and measuring the temperature of the outside air, a thermometer measuring the temperature in the engine room 22, and a measuring engine room. 22. The composition of the hygrometer, etc. for the humidity within. In addition, it is also possible to further include a sensor that measures the number of revolutions of the generator 27, the amount of power generation, and the like, which are not shown. Furthermore, it is not limited to the configuration in which all the above-mentioned sensors are provided.

The control device 29 acquires measurement data from the above-mentioned wind direction anemometer, the pitch angle sensor, the yaw angle sensor, and the above-mentioned various sensors 4 via the signal line, and appropriately controls based on the acquired measurement data The pitch angle, the nacelle azimuth, the rotation speed of the generator, etc., and the obtained measurement data are sent to the electronic terminal 5 installed in the operation management center 3 via the communication network 6 .

FIG. 2 is a perspective view showing the vicinity of the top of the tower of the wind power generator shown in FIG. 1 , and FIG. 3 is a side view of the vicinity of the top of the tower of the wind power generator shown in FIG. 1 . In FIGS. 2 and 3 , a perspective view of the nacelle 22 is shown for easy understanding of the situation near the top of the tower 21 . A yaw bearing gear 9 and a plurality of yaw actuators 10 are arranged at the connecting part of the tower 21 and the nacelle 22 to control the position of the nacelle 22 and the impeller, that is, the hub 23 and the plurality of blades 24 relative to the tower 21 The yaw drive device (yaw angle control mechanism) functions. The yaw bearing gear 9 is arranged on the top of the tower 21 , and a plurality of yaw actuators 10 are arranged in the nacelle 22 . The installed number of the yaw actuators 10 depends on the type or scale of the wind power generator 2. For example, when the power generation (output) is about 2 MW, about 4 are provided, and when the scale is about 5 MW, around the tower About 8 are arranged on the top of the frame 21 . Hereinafter, a case where eight yaw actuators 10 are provided will be described as an example. As shown in FIG. 3 , the yaw actuator 10 is a drive motor 13 that becomes a power source for yaw drive (yaw rotation), a reducer 12 that transmits the driving force of the drive motor 13 to the pinion 11 , and The pinion gear 11 provided so as to mesh with the yaw bearing gear 9 is connected.

FIG. 4 is a block diagram of the yaw actuator and the abnormality detection device of the present embodiment. A yaw power control unit 14 and a power blocking mechanism unit 15 are connected to the eight yaw actuators 10 , respectively. The yaw power control unit 14 is a device for outputting an operation signal to the yaw actuator 10, and includes an inverter. The converter includes, for example, a full-bridge circuit not shown. The full-bridge circuit switches a DC voltage source (not shown) on and off according to a drive signal input from a PWM (Pulse Width Modulation) control unit (not shown). , and output current to the drive motor 13 constituting the yaw actuator 10 . The full-bridge circuit includes four switching elements, and constitutes a first upper and lower arm (U-phase) including two switching elements connected in series, and a second upper and lower arm (V-phase) including two switching elements. The switching element can perform switching operations according to the pulsed gate signal output from the gate driver circuit (not shown) based on the driving signal generated by the PWM control unit.

Details The power blocking mechanism portion 15 described below is a device for operating the clutch mechanism built in the yaw actuator 10, and includes a hydraulic unit. It has the function of blocking the power of the yaw actuator 10 by controlling the oil pressure with the oil pressure unit. The output measurement unit 16 measures the current value of the inverter serving as the yaw power control unit 14 . Furthermore, other parameters such as torque, vibration, strain, etc. can be measured instead of measuring the current value of the current transformer. The output calculation unit 31 inputs the current values measured by the respective output measurement units 16 , obtains a total value thereof, and outputs the result to the abnormality determination unit 32 . The abnormality determination unit 32 described in detail below outputs a control signal to the yaw power control unit 14 and the power interruption mechanism unit 15 based on the total value input from the output calculation unit 31 . An abnormality detection device is constituted by the output calculation unit 31 and the abnormality determination unit 32 .

Here, the yaw actuator 10 and the power interruption mechanism unit 15 will be described. <Yaw actuator and power blocking mechanism> FIG. 6 is a partial cross-sectional view showing the yaw actuator 10 and the power blocking mechanism portion 15 shown in FIG. 4 . As shown in FIG. 6 , the yaw actuator 10 includes a drive motor 13 having a power shaft 44 and a speed reducer 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 . 12. The power interruption mechanism unit 15 includes a clutch control unit 90 to which a control signal is input from the abnormality determination unit 32 described in detail below, and a clutch hydraulic pressure source 94 driven by a hydraulic motor 252 . The clutch control unit 90 includes a pressure regulating valve 90a and an energization controller 90b. Further, the power shut-off mechanism portion 15 includes a relief valve 98 , an accumulator 95 , and a drain valve 99 connected to the clutch hydraulic pressure source 94 via the hydraulic pressure supply passage 93 in this order. The hydraulic pressure supply path 93 connecting the clutch hydraulic pressure source 94 and the relief valve 98 is branched in the middle, the branched hydraulic pressure supply path 93 is connected to the pressure regulating valve (solenoid valve) 90a, and the branched hydraulic pressure supply path 93 passes through the branch. The clutch hydraulic pressure source 94 is connected to the pressure regulating valve 90a. A drain valve 199 is provided in the hydraulic pressure supply passage 93 on the downstream side of the pressure regulating valve 90a.

[Reducer] The 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 The actuating portion 89 is connected to the pinion 11 of the output shaft 66 . In addition, the speed reducer 12 includes a housing 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 housing 40 , and a carrier holding the external gear 45 60 , and the pinion 11 connected to the carrier 60 via the clutch actuating portion 89 and the output shaft 66 . The casing 40 is formed in a cylindrical shape, and accommodates the input gear 43 , the plurality of spur gears 53 , the plurality of crankshafts 50 (shaft body 51 ), the external gear 45 , and the carrier 60 inside. The external gear 45 holds the plurality of crankshafts 50 rotatably via bearings for external teeth (not shown), and functions as a swing gear that swings by the plurality of crankshafts 50 according to the rotation of the input gear 43 and the plurality of spur gears 53 . The carrier 60 holds each crankshaft 50 rotatably, and holds the external gear 45 via the plurality of crankshafts 50 .

In the speed reducer 12 , the rotational power input from the drive motor 13 to the input gear 43 is rotationally reduced and output from the pinion gear 11 . The 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 a yaw driving force in a state where the torque is increased.

In FIG. 6 , the symbol “ L1 ” represents the central axis of the pinion gear 11 . The central axis of the inner peripheral surface of the housing 40 on which the inner teeth 42 are provided is located on the same axis as the central axis L1. In the following description, a direction only expressed as "axial" means a direction extending on the central axis L1 or a direction parallel to the central axis L1. In addition, the direction orthogonal to the central axis L1 is referred to as a "radial direction", and the direction around the central axis L1 is referred to as a "circumferential direction". The case 40 has a main case portion 41a formed in a cylindrical shape with 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). The output shaft 66 protrudes from the other end portion on the opposite side to the one end portion of the main case portion 41a to which the sub case portion 41b is attached.

The inner teeth 42 include a plurality of inner teeth pins formed in a pin shape. These internally toothed pins are fitted into pin grooves formed in plural at equal intervals in the circumferential direction across the entire area of the inner peripheral surface of the input side portion 111 of the main housing portion 41a, and the internally toothed pins The pins are arranged so that the longitudinal direction of each inner tooth pin becomes parallel to the central axis L1. The internal teeth 42 having such a configuration are arranged so as to mesh with the external teeth 46 of the external gear 45 . The drive motor 13 is attached to the sub-casing portion 41 b of the casing 40 . The power shaft 44 of the drive motor 13 extends toward the inner side of the sub-housing portion 41b, and is fixedly connected to the input gear 43 disposed in the sub-housing portion 41b, so that the rotational power generated by the drive motor 13 is passed through the power The shaft 44 is transmitted to the input gear 43 .

The carrier 60 has a first holding portion 61 that rotatably holds one end portion of the crankshaft 50 (the end portion on the input gear 43 and the spur gear 53 side), and the other end portion of the crankshaft 50 (the end on the side where the pinion gear 11 protrudes) part) a second holding part 62 rotatably held, a strut 63 connecting the first holding part 61 and the second holding part 62 , and a coupling cylinder part 64 for connecting the carrier 60 and the output shaft 66 . In addition, for convenience of description, the support|pillar 63 is shown by the two-dot chain 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 in the axial direction. The struts 63 are provided so as to straddle between the substantially central region in the radial direction of the first holding portion 61 and the substantially central region in the radial direction of the second holding portion 62 , and connect the first holding portion 61 and the second holding portion 62 . The coupling cylindrical 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 formed on the inner peripheral surface. A first end portion through hole 71 is formed in the first holding portion 61 , and one end portion of the crankshaft 50 is rotatably held in the first end portion through hole 71 via a first crankshaft bearing 73 . Further, a second end portion through hole 72 is formed in the second holding portion 62 , and the other end portion of the crankshaft 50 is rotatably held in the second end portion through hole 72 via a second crankshaft bearing 74 .

The carrier 60 of this embodiment is divided into two parts in the axial direction, including a first half body 60a disposed on the side of the auxiliary housing portion 41b and a second half body 60b disposed on the side where the pinion gear 11 protrudes. The first half body 60 a includes the above-described first holding portion 61 , a first column half portion constituting a part of the support column 63 , and a first cylindrical half portion 64 a constituting a part of the coupling cylindrical portion 64 . On the other hand, the second half body 60b includes the above-mentioned second holding portion 62 , a second column half portion constituting a part of the support column 63 , and a second cylindrical half portion 64b constituting a part of the coupling cylindrical portion 64 .

[Clutch Mechanism] As shown in FIG. 6 , the clutch mechanism includes a clutch actuating portion 89 and a clutch driving body 91 , and operates under the control of a clutch control portion 90 constituting the power interruption mechanism portion 15 . The clutch control unit 90 can drive and control the clutch actuating unit 89 and the clutch driving body 91 by any power such as an air pressure system or a hydraulic system. For example, in the yaw actuator 10 shown in FIG. 6 , the clutch actuating 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, the clutch control unit 90, etc. are provided separately from the yaw actuator 10, and the clutch hydraulic The pressure source 94 and the clutch control unit 90 are connected to the clutch driving body 91 . The clutch driving body 91 is provided so as to be movable in the axial direction by being pressed by the liquid transmission medium, and the contact state (pressing state) of the clutch driving body 91 with respect to the clutch actuating portion 89 is changed according to the axial position of the clutch driving body 91 . The clutch control part 90 can change the pressing force of the clutch driving body 91 to the clutch actuating part 89 by adjusting the pressure of the liquid transmission medium in the oil pressure supply path 93 (especially between the clutch control part 90 and the clutch driving body 91 ). , and the clutch clutch of the clutch actuating portion 89 is controlled accordingly.

The clutch actuating portion 89 includes a first friction plate 89a connected to the output shaft 66 by a spline connection, and a second friction plate 89b connected to the pinion 11 by a spline connection. The first friction plate 89a and the second friction plate 89b are provided so that their behavior in the rotational direction around the central axis L1 is constrained by the output shaft 66 and the pinion gear 11, respectively, but may not be affected by the output shaft 66 and the pinion gear 11 in the direction of the central axis L1 move within constraints. However, the movement in the direction of the central axis L1 of the first friction plate 89a and the second friction plate 89b is restricted by the clutch driving body 91 and the first connecting member 107 provided below the first friction plate 89a and the second friction plate 89b, preventing the The first friction plate 89a and the second friction plate 89b come off. The first connecting member 107 is attached to the front end portion of the output shaft 66 via the screw member 107 a, and is disposed 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 disposed below the first friction plate 89a and the second friction plate 89b. The outer peripheral portion of the first coupling member 107 is arranged at a position where the first friction plate 89a and the second friction plate 89b supported by the first coupling member 107 do not press against each other and do not overlap the first friction plate 89a and the second friction plate 89b. A position where frictional force is generated between the second friction plates 89b.

The clutch driving body 91 is provided inside the pinion 11 so as to be movable in the direction of the central axis L1 below the clutch actuating portion 89 (the first friction plate 89 a and the second friction plate 89 b ). A part of the lower part of the clutch driving body 91 is cut out, and the elastic member 92 is inserted in the cut-out part of the clutch driving body 91 . The elastic member 92 shown in FIG. 6 includes a leaf spring, and is held by the second connecting member 109 and the clutch driving body 91 attached to the lower part of the pinion 11 via the screw member 109a. The elastic member 92 applies its own elastic force to the clutch driving body 91 in the direction of the central axis L1 so as to press the clutch driving body 91 against the clutch actuating portion 89 (the first friction plate 89a and the second friction plate 89b ). push pressure. Furthermore, the elastic member 92 can also be constituted by a disc spring instead of a plate spring.

The hydraulically acting portion 93b has a liquid-tight structure by a sealing member such as an O-ring provided between the pinion 11 and the clutch driving body 91 , but communicates with the hydraulic supply passage 93 formed in the pinion 11 . The hydraulic pressure supply passage 93 formed in the pinion gear 11 communicates with the hydraulic pressure supply passage 93 formed in the second connection member 109, and the hydraulic pressure supply passage 93 formed in the second connection member 109 is adjusted by the self-pressure via the rotary joint The oil pressure supply path 93 extending from the valve 90a is communicated. Therefore, the clutch hydraulic pressure source 94 communicates with the hydraulic pressure acting portion 93 b via the hydraulic pressure supply passage 93 .

FIG. 7 is a schematic diagram showing the transmission state of the rotational power from the output shaft pinion shown in FIG. 6 , and FIG. 8 is a schematic diagram showing the non-transmission state of the rotational power from the output shaft pinion shown in FIG. 6 . In addition, in FIG. 7 and FIG. 8 , in order to facilitate the understanding of the operation mechanism, the display of each element is simplified, and the illustration of some elements is omitted. When the rotational power is transmitted from the output shaft 66 to the pinion gear 11, the pressure regulating valve 90a shown in FIG. 6 is closed to block the flow of the liquid transmission medium in the oil pressure supply path 93, and the pressure regulating valve 90a to the pinion gear is closed. The pressure in the oil pressure supply passage 93 in 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, the first friction plate 89a and the second friction plate 89b are sandwiched between the clutch driving body 91 and the pinion 11, and the center shaft Push each other in the L1 direction. Thereby, the first friction plate 89a and the second friction plate 89b are frictionally engaged with each other, and the rotational power from the output shaft 66 is transmitted to the pinion gear 11, and the pinion gear 11 is connected to the pinion gear 11 via the first friction plate 89a and the second friction plate 89b. The output shaft 66 integrally rotates.

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 circulation of the liquid transmission medium in the hydraulic pressure supply passage 93, and the high pressure liquid transmission medium is released from the clutch oil. The pressure source 94 is sent to the oil pressure supply passage 93 in the pinion 11 . Then, the high-pressure liquid transmission medium flows from the hydraulic supply passage 93 in the pinion 11 to the hydraulically acting portion 93b, and the clutch driving body 91 resists the elastic force of the elastic member 92, and moves toward the first friction plate 89a and the second friction plate 89a. The plate 89b moves in the direction away from it. As a result, the pressing force between the first friction plate 89a and the second friction plate 89b is reduced, and the frictional engagement between the first friction plate 89a and the second friction plate 89b is released, and the rotation of the output shaft 66 is stopped. The power is 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 11 basically do not rotate.

<Control device> Next, the control apparatus 29 shown in FIG. 1 is demonstrated. FIG. 5 is a functional block diagram of the control device 29 shown in FIG. 1 . As shown in FIG. 5 , the control device 29 includes an output calculation unit 31 , an abnormality determination unit 32 , a memory unit 33 , a device control unit 34 , a communication I/F 36 , an input I/F 37 , and an output I/F 38 , which are mutually compatible. The connection is made by means of the internal bus bar 39 for access. The output calculation unit 31 , the abnormality determination unit 32 , and the machine control unit 34 use a processor such as a CPU (Central Processing Unit), not shown, and a ROM (read only memory) for storing various programs, for example. ), RAM (Random Access Memory), an external memory device and other memory devices that temporarily store the data of the operation process, and the CPU and other processors read out various programs stored in the ROM and execute them, which will be used as The operation result of the execution result is stored in RAM or an external memory device.

The machine control unit 34 acquires the measurement data of the sensors 4 such as the wind direction anemometer, the pitch angle sensor, the yaw angle sensor, and the strain sensor through the input I/F 37 and the internal bus bar 39 . The equipment control unit 34 controls the operation of the wind power generator 2 based on the acquired measurement data. For example, while controlling parameters such as the orientation of the blade 24 or the number of revolutions based on the wind speed data, the operation is continued. Specifically, based on the wind direction data measured by the wind direction anemometer, the yaw angle control signal is output to the yaw power control unit 14 constituting the yaw angle control mechanism through the output I/F 38, so that the blades 24 and the hub 23 are included. The impeller is directly opposite to the wind direction, and/or, based on the wind speed data measured by the wind direction anemometer, the pitch angle control signal as the pitch angle of the blade 24 is output to the pitch angle control mechanism 17 via the output I/F 38. Furthermore, the device control unit 34 outputs a rotational speed control signal for controlling the rotational speed of the generator to the gearbox 26 via the output I/F 38 based on the power generation amount of the generator 27 measured by the sensor 4 .

The output computing unit 31 acquires the current value of the inverter serving as the yaw power control unit 14 measured by the output measuring unit 16 corresponding to each yaw actuator 10 through the input I/F 37 and the internal bus bar 39 . The output calculation unit 31 adds the acquired current values of the current transformers corresponding to the yaw actuators 10 , and transmits the output sum to the abnormality determination unit 32 via the internal bus 39 . The abnormality determination unit 32 compares the total value of the outputs transmitted from the output calculation unit 31 with a predetermined first threshold value, and determines the presence or absence of an abnormality in the yaw actuator 10 . In addition, the abnormality determination unit 32 detects the abnormality of the yaw actuator 10 in the processing described in detail below, and sends the output I/F 38 to the corresponding response in order to stop the specific yaw actuator 10 . The power blocking mechanism 15 corresponding to the stopped yaw actuator 10 outputs a control signal. In this case, as described above, the power shut-off mechanism portion 15 allows the liquid state in the hydraulic pressure supply passage 93 to be allowed to open by the energization controller 90b constituting the power shut-off mechanism portion 15 to open the pressure regulating valve 90a. The circulation of the transmission medium sends the high-pressure liquid transmission medium from the clutch oil pressure source 94 to the oil pressure supply passage 93 in the pinion 11 . Then, as shown in FIG. 8 , the clutch mechanism operates to release the frictional engagement between the first friction plate 89 a and the second friction plate 89 b , and the rotational power of the output shaft 66 is no longer transmitted to the pinion 11 . In other words, the power blocking mechanism portion 15 blocks the power of the yaw actuator 10 to be stopped. Furthermore, the abnormality determination unit 32 transmits the abnormality determination result 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 . The abnormality detection device 30 is constituted by the output calculation unit 31 and the abnormality determination unit 32 .

The memory section 33 will obtain the measurement data of the sensor 4, such as the wind direction anemometer, the pitch angle sensor, the yaw angle sensor, and the strain sensor, which are obtained through the input I/F 37 and the internal bus bar 39. Stored in the specified memory area. Moreover, the memory|storage part 33 memorize|stores the predetermined 1st threshold value and the predetermined 2nd threshold value which are used in the abnormality detection apparatus 30 in the predetermined memory area|region which are mentioned later in detail.

Measurement data such as wind direction anemometer, pitch angle sensor, yaw angle sensor, and strain sensor as sensor 4 obtained through input I/F 37 and internal bus bar 39, as needed It is transmitted to the electronic terminal 5 installed in the operation management center 3 via the communication I/F 36 and the communication network 6 .

Furthermore, in this embodiment, the control device 29 shown in FIG. 5 is arranged at the bottom (lower part) of the tower 21, but it is not limited to this. For example, a configuration may be adopted in which a console is arranged in the nacelle 22, and a yaw angle command calculation unit and a pitch angle command calculation unit, and/or abnormality detection, which are part of the functions of the above-mentioned machine control unit 34 are installed. device 30.

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

[Operation of the abnormality detection device] FIG. 9 is a flowchart of the abnormality detection device 30 shown in FIG. 5 . In step S11, when the abnormality detection device 30 detects an abnormality in the yaw rotation, the process proceeds to step S12. Here, the "abnormal yaw rotation" refers to, for example, a tracking error of the yaw angle with respect to the yaw angle control command, or the yaw power control unit 14 that drives the drive motor 13 constituting the yaw actuator. The abnormality of the converter, etc.

In step S12, the abnormality determination unit 32 constituting the abnormality detection device 30 calculates the total value of the outputs (converted currents corresponding to the yaw actuators 10a to 10h) calculated by the output calculation unit 31 constituting the abnormality detection device 30. The total value of the current value of the device) is compared with the predetermined first threshold value stored in the memory unit 33 . When the result of the comparison is that the total value of the outputs is equal to or less than the predetermined first threshold value, the process proceeds to step S18, and the abnormality determination unit 32 determines that an abnormality other than the yaw actuator has occurred. Then, in step S19, the windmill, that is, the wind turbine generator 2 is stopped, and the process is terminated. On the other hand, when the result of the comparison is that the total value of the outputs 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 (current values of the converters) of the yaw actuators 10a to 10h during the trial operation in the factory is set, or the wind power generator 2 is installed. The total value of the outputs of the yaw actuators 10a to 10h during the trial operation. Furthermore, it is not limited to this, and the actual data stored in the database (not shown), that is, the maintenance records such as the replacement of the yaw actuator, can also be used to make each yaw cause earlier than the maintenance time. The average of the total value of the output of the actuator is changed to the predetermined first threshold value, and further, the first threshold value previously set as described above may be corrected based on actual data.

In step S13, the abnormality determination unit 32 determines that at least one of the yaw actuators 10a to 10h is abnormal. In step S14, the abnormality determination unit 32 executes the yaw actuator abnormality part detection sequence. Furthermore, the details of the abnormal part detection sequence of the yaw actuator will be described below.

In step S15, the abnormality determination unit 32 determines whether or not an abnormal part of the yaw actuator has been detected in step S14. When the determination result is that the abnormal part of the yaw actuator is not detected, the process proceeds to the above-mentioned step S18. On the other hand, when the determination result is that the abnormal part of the yaw actuator is detected, the process proceeds to step S16.

In step S16, the abnormality determination unit 32 blocks the power of the abnormal yaw actuator. Specifically, as described above, the abnormality determination unit 32 outputs the control signal to the power blocking mechanism unit 15 corresponding to the abnormal yaw actuator via the output I/F 38 . The power shut-off mechanism portion 15 opens the pressure regulating valve 90a by the energization controller 90b constituting the power shut-off mechanism portion 15 to allow the flow of the liquid transmission medium in the hydraulic pressure supply passage 93, thereby reducing the high-pressure The liquid transmission medium is sent from the clutch oil pressure source 94 to the oil pressure supply path 93 in the pinion 11 . Then, as shown in FIG. 8 , the clutch mechanism operates to release the frictional engagement between the first friction plate 89 a and the second friction plate 89 b , and the rotational power of the output shaft 66 is not output to the pinion gear 11 . Thereby, the power blocking mechanism part 15 blocks the power of the abnormal yaw actuator. Furthermore, the abnormality determination unit 32 transmits the detected information of the 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 operator (operator) can quickly check whether the maintenance of the abnormal yaw actuator is necessary or not, or use the To prepare for the purchase of maintenance parts, etc.

In step S17, the abnormality determination unit 32 continues the operation of the yaw actuators other than the power cut off, and ends the process. In other words, the abnormality determination unit 32 performs the degraded operation using the yaw actuator other than the abnormal yaw actuator.

FIG. 10 is a flowchart showing a detailed flow of the abnormal part detection sequence of the yaw actuator shown in FIG. 9 . In step S141, the abnormality determination unit 32 selects m yaw actuators from the n (total) yaw actuators. Here, as an example, m yaw actuators are selected from n=8, that is, eight yaw actuators 10a to 10h. In this case, it is preferable to set it as 1≦m≦3. In addition, the total number n is not limited to 8, and may be appropriately set, and the obtainable range of m in this case may be, for example, (1/8×n)≦m≦(3/8×n). Hereinafter, the case where m=3 is set as an example will be described.

In step S142, the abnormality determination unit 32 stops m yaw actuators, and performs yaw rotation with (n-m) yaw actuators. That is, the yaw actuators 10a to 10c, which are the three yaw actuators, are stopped by interrupting the power of the three yaw actuators. The yaw rotation is performed by correspondingly outputting a control signal of the inverter as the yaw power control unit 14 .

In step S143 , the output computing unit 31 obtains, through the input I/F 37 and the internal bus bar 39 , the variables measured by the output measuring units 16 corresponding to the yaw actuators 10 d to 10 h as the variation of the yaw power control unit 14 . The current value of the current transformer. Then, the output calculation unit 31 adds the acquired current values of the current transformers corresponding to the yaw actuators 10d to 10h, and transmits the output sum to the abnormality determination unit 32 via the internal bus 39 .

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

In step S145, the abnormality determination part 32 selects m different yaw actuators, and returns to step S142. Specifically, the yaw actuators 10d to 10f are selected as three different yaw actuators. In step S142 , the abnormality determination unit 32 stops the yaw actuators 10d to 10f by blocking the power of the yaw actuators 10d to 10f. The yaw actuators 10g to 10h corresponding to the yaw power control unit 14 output a control signal to the inverter to perform yaw rotation. By repeating the processing of steps S142 to S145 in this manner, the yaw actuator abnormality part detection sequence is executed. Furthermore, in this embodiment, the case where m=3 is set when the total number n=8 is shown, so it may occur that the yaw actuators 10g-10h are selected as one of the two actuators in step S145. situation. In this case, the yaw rotation is performed by the yaw actuators 10a to 10f as the remaining six yaw actuators, and the predetermined second threshold value to be compared with the total value of the outputs in step S144 is set, for example, as (6/8)×(prescribed first threshold value).

By setting m=3 as in the present embodiment, the group (group) including the yaw actuator in the abnormal state can be determined as soon as possible, and when the situation of the yaw actuator in the abnormal state is specified, the By sequentially stopping the m yaw actuators constituting the group (group) judged to be abnormal, and performing the same judgment, the yaw actuator in the abnormal state can be identified. It is also possible to have a configuration in which, among the yaw actuators arranged at predetermined intervals, the actuators arranged at symmetrical positions in the circumferential direction of the yaw bearing gear 9 are selected instead of continuous as described above. Adjacent 3 yaw actuators and stop them. Furthermore, in the case of m=1, by repeating the above-mentioned steps S142 to S145 at most 8 times, the yaw actuator in the abnormal state can be identified.

Strictly speaking, the load applied to a plurality of yaw actuators provided at predetermined intervals in the circumferential direction on the outer peripheral side of the yaw bearing gear 9 varies depending on the wind conditions (wind direction and wind speed). Each yaw actuator is different. However, as shown in FIGS. 9 and 10 , by using the total value of the outputs of the yaw actuators in the yaw rotation (the total value of the current values of the current transformers corresponding to the yaw actuators), it is possible to Absorbs the influence of wind conditions and determines the abnormality of the yaw actuator. In other words, by using the total value of the outputs of the yaw actuators for abnormality determination, even when different loads are applied to the respective yaw actuators, the determination can be made without considering the influence.

In this embodiment, in the flowchart shown in FIG. 9 , it is assumed that the step S12 is entered when the abnormal yaw rotation is detected in the step S11, but the step of “detecting the abnormal yaw rotation” is not necessarily required, Instead, it may be set as the structure which performs the process of step S12 - step S19 in predetermined cycle.

In addition, the wind power generation apparatus and the wind power generation system of the present embodiment can be similarly applied to a wind farm including a plurality of wind power generation apparatuses.

As described above, according to the present embodiment, it is possible to provide a wind power generation device and a wind power generation system capable of early determination of the abnormality of the yaw actuator. Furthermore, according to the present embodiment, even when different loads are applied to the yaw actuators due to wind conditions (wind direction and wind speed), the determination can be made without considering the influence. [Example 2]

FIG. 11 is an overall schematic configuration diagram of the wind power generation system according to the second embodiment of the present invention. In the first embodiment, the total value of the outputs of the plurality of yaw actuators installed in one wind turbine generator 2 is compared with the predetermined first threshold value to determine the abnormality. In contrast to this, this The difference between Example 1 and Example 1 is that a wind farm where a plurality of wind power generators are installed is taken as an object, and the difference between the plurality of yaw actuators installed in each of the two adjacent wind power generators in the wind farm is compared. The outputs are compared relative to each other, thereby determining the abnormality. The same reference numerals are assigned to the same components as those of the first embodiment, and the descriptions overlapping those of the first embodiment will be omitted below.

As shown in FIG. 11, the wind power generation system 1a of this embodiment includes: a plurality of wind power generation devices (2a, 2b, . . . 2n), an electronic terminal 5 installed in the operation management center 3, and each wind power generation device (2a , 2b, . . . 2n) within the control device 29a, and the communication network 6 that connects the electronic terminal 5 and the control device 29a in a communicable manner. Here, the communication network 6 is not limited to wired or wireless. Sensors 4 installed in each wind power generator (2a, 2b, . . . 2n), yaw bearing gears 9 and a plurality of yaw actuators 10 not shown in the connecting portion of tower 21 and nacelle 22 It is the same as the above-mentioned Embodiment 1, so the description is omitted. In addition, the configuration of the yaw power control unit 14 and the power cutoff mechanism unit 15 is also the same as that of the first embodiment, so the description is omitted. Generally speaking, in a wind farm, the wind passing through the wind power generation device on the windward side is affected by the rotation of the impeller constituting the wind power generation device on the windward side, and the wind direction, wind speed and other wind conditions change, and the wind direction, wind speed and other wind conditions change, and the wind direction, wind speed, etc. Wind power transmission on the wind side. In this way, the flow of the wind with the changed wind condition transmitted to the wind power generating device on the leeward side is called a windmill backflow (also called a wake). Furthermore, the wind condition that changes when passing through the wind turbine generator on the windward side is not limited to the wind direction and wind speed, but also includes the turbulent flow characteristics and the shape of the vortex as the turbulent flow of the wind. After passing through the wind turbine on the windward side, the back flow (wake) of the windmill expands and flows on the leeward side. That is, while the windmill rear flow spreads, a vortex flow (turbulent flow) is generated, and it is transmitted to the leeward side.

FIG. 12 is a functional block diagram of the control device 29a shown in FIG. 11 . Here, it is assumed that the control device 29a shown in FIG. 12 is a control device provided in the wind power generator 2a. As shown in FIG. 12, the control device 29a includes an output calculation unit 31, an abnormality determination unit 32, a memory 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 F38, these are connected in such a way that they are accessible to each other by means of the internal bus bar 39. The output calculation unit 31 , the abnormality determination unit 32 , the machine control unit 34 , and the normalization processing unit 35 use a processor such as a CPU (Central Processing Unit), not shown, for example, a ROM for storing various programs, and temporarily store the data of the calculation process. It is realized by a memory device such as RAM and an external memory device, and a processor such as a CPU reads out various programs stored in the ROM and executes it, and stores the operation result as the execution result in the RAM or the external memory device.

The machine control unit 34 acquires measurement data such as anemometers, pitch angle sensors, yaw angle sensors, and strain sensors as the sensors 4 through the input I/F 37 and the internal bus bar 39 . The equipment control unit 34 controls the operation of the wind power generator 2 based on the acquired measurement data. For example, while controlling parameters such as the orientation of the blade 24 or the number of revolutions based on the wind speed data, the operation is continued. Specifically, based on the wind direction data measured by the wind direction anemometer, the yaw angle control signal is output to the yaw power control unit 14 constituting the yaw angle control mechanism through the output I/F 38, so that the blades 24 and the hub 23 are included. The impeller is directly opposite to the wind direction, and/or, based on the wind speed data measured by the wind direction anemometer, the pitch angle control signal as the pitch angle of the blade 24 is output to the pitch angle control mechanism 17 via the output I/F 38. Furthermore, the device control unit 34 outputs a rotational speed control signal for controlling the rotational speed of the generator to the gearbox 26 via the output I/F 38 based on the power generation amount of the generator 27 measured by the sensor 4 .

The normalization processing unit 35 obtains, through the input I/F 37 and the internal bus bar 39, the measurement results obtained by the output measurement unit 16 corresponding to each yaw actuator 10 provided in the wind turbine generator 2a (first wind turbine generator). It is used as the current value of the current transformer of the yaw power control unit 14 . Further, the normalization processing unit 35 acquires the data of each offset from the wind turbine generator 2b (second wind turbine generator) installed adjacent to the wind turbine generator 2a via the communication network 6, the input I/F 37, and the internal busbar 39, for example. The current value of the current transformer of the yaw power control unit 14 is measured by the output measuring unit 16 corresponding to the yaw actuator 10 . As described above, in the adjacent wind power generators 2a (first wind power generators) and wind power generators 2b (second wind power generators), the wind conditions change, and the wind power generator 2b (second wind power generator) on the leeward side power generation units) are also affected by windmill backflow. Therefore, the load applied to each yaw actuator 10 installed in the wind power generator 2a (first wind power generator) and the yaw actuators 10 installed on the leeward side of the wind power generator 2b (second wind power generator) The loads applied to the aviation actuator 10 are different. It appears that the larger the applied load, the higher the amplitude of the current of the current transformer corresponding to the yaw actuator 10 becomes. Therefore, the normalization processing unit 35 compares the acquired current values of the converters corresponding to the yaw actuators 10 of the wind turbine generator 2a (first wind turbine generator) and the current values of the inverters provided in the adjacent wind turbine generator 2b ( The current value of the converter corresponding to each yaw actuator 10 of the second wind power generator) is, for example, normalized based on the peak level of the amplitude of the current value. The normalization processing unit 35 transmits the normalized current value of the inverter of the wind power generator 2a (first wind power generator) and the normalized value of the normalized value to the output calculation unit 31 and the abnormality determination unit 32 via the internal bus bar 39 . The current value of the converter of the adjacent wind turbine generator 2b (second wind turbine generator).

The output calculation unit 31 adds the current values of the converters corresponding to the yaw actuators 10 of the wind turbine generator 2a (first wind turbine generator) after the normalization process transmitted from the normalization processing unit 35, The sum of the outputs of the yaw actuators 10 of the wind turbine generator 2a (first wind turbine generator) is transmitted to the abnormality determination unit 32 via the internal bus bar 39 . In addition, the output calculation unit 31 outputs the current value of the converter corresponding to each yaw actuator 10 of the adjacent wind turbine generator 2b (second wind turbine generator) after the normalization process transmitted from the normalization processing unit 35. The addition is performed, and the sum of the outputs of the yaw actuators 10 of the wind turbine generator 2b (second wind turbine generator) is sent to the abnormality determination unit 32 via the internal bus bar 39 . The abnormality determination unit 32 uses a curve (normalized) of the current value of the converter corresponding to each yaw actuator 10 of the wind turbine generator 2a (first wind turbine generator) after the normalization process transmitted from the normalization processing unit 35. The curve of the output of each yaw actuator of the wind power generator 2a (first wind power generator) after the normalization process), and the normalization process transmitted from the normalization processing unit 35 and the adjacent wind power generator 2b ( Curve of the current value of the converter corresponding to each yaw actuator 10 of the second wind turbine The output curves) are compared, and when the comparison results are substantially consistent, it is determined that the wind power generator 2a (first wind power generator) and the adjacent wind power generator 2b (the second wind power generator) are both yaw-induced Actuator 10 is normal. On the other hand, in the case where the comparison result varies, the wind power generation device having the abnormal yaw actuator is specified.

Alternatively, the abnormality determination unit 32 compares the total value of the outputs of the respective yaw actuators 10 of the wind turbine generator 2 a (first wind turbine generator) transmitted from the output calculation unit 31 to the wind turbine generator transmitted from the output calculation unit 31 . 2b (2nd wind power generator) The total value of the output of each yaw actuator 10 is compared, and when the comparison results are substantially the same, it is determined that the wind power generator 2a (1st wind power generator) and the adjacent wind power Each of the yaw actuators 10 was normal in the power generator 2b (second wind power generator). On the other hand, in the case where the comparison result varies, the wind power generation device having the abnormal yaw actuator is specified. Furthermore, the abnormality detection device 30 a includes a normalization processing unit 35 , an output calculation unit 31 , and an abnormality determination unit 32 .

FIG. 13 is a flowchart of the abnormality detection device 30a shown in FIG. 12 . Hereinafter, the operation|movement of the abnormality detection apparatus 30a which comprises the control apparatus 29a provided in the wind turbine generator 2a is demonstrated as an example. In step S21, the abnormality detection device 30a sets two wind turbines (a first wind turbine and a second wind turbine) adjacent to each other in the wind farm. Here, it is assumed that the selected first wind power generator is the wind power generator 2a, and the second wind power generator is the wind power generator 2b.

In step S22, the normalization processing unit 35 constituting the abnormality detection device 30a acquires the yaw correlation with each of the selected first wind power generator (wind power generator 2a) and the second wind power generator (wind power generator 2b). The output measurement unit 16 corresponding to the actuator 10 measures the current value of the converter.

In step S23, the normalization processing unit 35 compares the acquired current value of the converter corresponding to each yaw actuator 10 of the first wind power generator (wind power generator 2a) and the current value of the converter corresponding to the second wind power generator (wind power generator 2a). The current value of the converter corresponding to each yaw actuator 10 of the wind power generation device 2b) is, for example, normalized based on the peak level of the amplitude of the current value. The normalization processing unit 35 normalizes the current value of the inverter of the first wind power generator (wind power generator 2a) after the normalization process and the normalized second wind power generator (wind power generator 2b) through the internal bus bar 39 ), the current value of the current transformer is sent to the abnormality determination unit 32 .

In step S24, the abnormality determination unit 32 compares the normalized output curves of the yaw actuators between the first wind power generator (wind power generator 2a) and the second wind power generator (wind power generator 2b). When the comparison result shows that there is a change, the process proceeds to step S25, and the wind power generator with the abnormal yaw actuator is specified, and the process ends. On the other hand, when the comparison result is substantially the same, the process proceeds to step S26.

In step S26, two adjacent wind power generators are selected, and the process returns to step S22, and the processes of steps S22 to S26 are performed on all the wind power generators 2n in the wind farm.

In addition, instead of step S24, the output calculation unit 31 performs the normalization process transmitted from the normalization processing unit 35 to the variable current corresponding to each yaw actuator 10 of the first wind power generator (wind power generator 2a). The current values of the generators are added, and the sum of the outputs of the yaw actuators 10 of the first wind power generator (wind power generator 2 a ) is sent to the abnormality determination unit 32 via the internal bus bar 39 . Further, the current of the converter corresponding to each yaw actuator 10 of the adjacent second wind power generator (wind power generator 2b) after the normalization process transmitted from the normalization processing unit 35 is carried out by the output calculation unit 31 The values are added, and the sum of the outputs of the yaw actuators 10 of the second wind turbine generator (wind turbine generator 2 b ) is transmitted to the abnormality determination unit 32 via the internal bus bar 39 . Then, a configuration may be adopted in which the abnormality determination unit 32 transmits the sum of the outputs of the respective yaw actuators 10 of the first wind power generator (wind power generator 2a) and the second wind power generator (wind power generator 2a). The sum of the outputs of the yaw actuators 10 of the device 2b) is compared.

In addition, it can also be configured as follows: for the wind power generation device with the abnormal yaw actuator specified in the above step S25, the abnormal part detection sequence of the yaw actuator shown in FIG. 10 in the above-mentioned embodiment 1 is executed. Detailed process.

Furthermore, in this embodiment, the abnormality detection device 30a constituting the control device 29a of one of the two wind turbine generators installed adjacent to each other executes the flow shown in FIG. 13, but It is not limited to this. For example, the following configuration may be employed: the abnormality detection device 30a is installed in the electronic terminal 5 installed in the operation management center 3, and the flow shown in FIG. 13 is executed.

As described above, according to the present embodiment, in addition to the effect of the first embodiment, even in a wind farm in which a plurality of wind turbines are installed, a wind turbine having a yaw actuator in which an abnormality has occurred can be identified as soon as possible . Furthermore, according to the present embodiment, the abnormality can be determined by relatively comparing the outputs of the plurality of yaw actuators installed in each of the two adjacent wind turbine generators in the wind farm. Relatively simple processing realizes abnormal judgment.

Furthermore, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-mentioned embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, but the present invention is not necessarily limited to having all the structures described. In addition, a part of the configuration of a certain embodiment may be replaced with the configuration of another embodiment, and the configuration of another embodiment may be added to the configuration of a certain embodiment.

1: Wind power generation system 1a: Wind Power Systems 2: Wind power plant 2a: Wind Power Plants 2b: Wind Power Plants 2n: wind power plant 3: Operation Management Center 4: Sensor 5: Electronic terminal 6: Communication network 9: Yaw bearing gear 10: Yaw actuator 11: pinion gear 12: Reducer 13: drive motor 14: Yaw power control section 15: Power Blocking Mechanism Department 16: Output measurement section 17: Pitch angle control mechanism 21: Tower 22: Cabin 23: Wheels 24: Blades 25: Spindle 26: Speed up machine 27: Generator 28: Power Converter 29: Controls 29a: Controls 30: Abnormal detection device 30a: Abnormal detection device 31: Output operation part 32: Abnormal Determination Department 33: Memory Department 34: Machine Control Department 35: Normalization Processing Department 36: Communication I/F 37: Input I/F 38: Output I/F 39: Internal busbar 40: Shell 41a: main housing part 41b: Auxiliary housing part 42: Internal teeth 43: Input gear 44: Power shaft 45: External gear 46: External teeth 50: Crankshaft 51: Rod body 53: Spur Gear 60: Carrier 60a: 1st half body 60b: 2nd half body 61: 1st Retention Department 62: 2nd Retention Division 63: Pillar 64: Combined barrel 64a: 1st cylinder half 64b: 2nd barrel half 65: Spline part on carrier side 66: Output shaft 71: Through hole for the first end 72: Through hole for second end 73: Bearing for the first crankshaft 74: Bearing for the second crankshaft 89: Clutch Actuator 89a: 1st friction plate 89b: 2nd friction plate 90: Clutch control unit 90a: Pressure regulating valve 90b: Power On Controller 91: Clutch drive body 92: Elastic member 93: Hydraulic supply path 93b: Hydraulic action part 94: Clutch oil pressure source 95: Accumulator 98: Relief valve 99: Drain valve 107: 1st connecting member 107a: Screw components 109: Second link member 109a: Screw components 111: Input side part 199: Drain valve 252: hydraulic motor

FIG. 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 top of the tower of the wind power generator shown in FIG. 1 . FIG. 3 is a side view showing the vicinity of the top of the tower of the wind power plant shown in FIG. 1 . 4 is a block diagram of the yaw actuator and the abnormality detection device of the first embodiment. FIG. 5 is a functional block diagram of the control device shown in FIG. 1 . FIG. 6 is a partial cross-sectional view showing the yaw actuator and the power blocking mechanism shown in FIG. 4 . FIG. 7 is a schematic view showing the transmission state of the rotational power of the pinion gear from the output shaft shown in FIG. 6 . FIG. 8 is a schematic view showing a non-transmission state of the rotational power from the output shaft shown in FIG. 6 to the pinion. FIG. 9 is a flowchart of the abnormality detection apparatus shown in FIG. 5 . FIG. 10 is a flowchart showing a detailed flow of the abnormal part detection sequence of the yaw actuator shown in FIG. 9 . FIG. 11 is an overall schematic configuration diagram of the wind power generation system according to the second embodiment of the present invention. FIG. 12 is a functional block diagram of the control device shown in FIG. 11 . FIG. 13 is a flowchart of the abnormality detection apparatus shown in FIG. 12 .

4: Sensor

6: Communication network

14: Yaw power control section

15: Power Blocking Mechanism Department

16: Output measurement section

17: Pitch angle control mechanism

29: Controls

30: Abnormal detection device

31: Output operation part

32: Abnormal Determination Department

33: Memory Department

34: Machine Control Department

36: Communication I/F

37: Input I/F

38: Output I/F

39: Internal busbar

Claims (11)

A wind power generator is characterized by comprising: a nacelle for supporting an impeller that is rotated by wind; a tower for rotatably supporting the nacelle; and a plurality of yaw actuators for making the nacelle relative to the tower Frame rotation; and abnormality detection means for detecting abnormality of said yaw actuator; said abnormality detection means compares the sum of the outputs of the respective yaw actuators with a prescribed first threshold value, and if the sum of said outputs is If the value exceeds the first threshold value specified above, it is determined that the yaw actuator is abnormal, and the abnormality detection device includes an abnormality determination unit that, when the total value of the outputs exceeds the first threshold value specified above, , a part of the yaw actuators among the plurality of yaw actuators is stopped, and the abnormal yaw actuator is determined based on the total value of the outputs of the yaw actuators in operation. The wind power generator according to claim 1, wherein the abnormality determination unit stops a part of the yaw actuators among the plurality of yaw actuators, and the total value of the outputs of the yaw actuators in operation exceeds a predetermined value In the case of the second threshold value, the operating yaw actuator is determined to be abnormal. The wind power generator according to claim 2, wherein the abnormality determination unit stops each of a part of the yaw actuators in sequence among the plurality of yaw actuators, and sets the output of the yaw actuator in operation to The total value and the 2nd of the above provisions Thresholds are compared to identify the abnormal yaw actuator. The wind power generator according to claim 2 or 3, wherein the second threshold specified above is smaller than the first threshold specified above. The wind power generator according to claim 4, wherein the second threshold specified above is obtained by multiplying the ratio of the number of partial yaw actuators to be stopped in the total number of the plurality of yaw actuators by the above A predetermined first threshold value is set. The wind power generator according to claim 5, wherein the first threshold specified above is at least the total value of each yaw actuator during trial operation in the factory, and each yaw value during trial operation when the wind power generator is installed Either the total value of the outputs of the actuators, and the average of the total values of the outputs of the respective yaw actuators within a specified period earlier than when maintenance was performed based on the maintenance record including the replacement of the yaw actuator By. A wind power generation system comprising: a plurality of wind power generation devices including a nacelle for supporting an impeller that is rotated by wind, a tower for rotatably supporting the nacelle, and an abnormality detection device; A plurality of yaw actuators for rotating the nacelle relative to the tower, the abnormality detection device detects the abnormality of the yaw actuator, and the abnormality detection device compares the sum of the outputs of the yaw actuators with the sum of the outputs of the yaw actuators. If the total value of the above-mentioned outputs exceeds the above-mentioned predetermined first threshold value, it is determined that the yaw actuator is abnormal, and The abnormality detection device includes an abnormality determination unit that stops a part of the yaw actuators among the plurality of yaw actuators when the total value of the outputs exceeds the predetermined first threshold value, and stops the yaw actuators. An abnormal yaw actuator is determined based on the total value of the outputs of the yaw actuators in operation. The wind power generation system according to claim 7, wherein the abnormality determination unit stops a part of the yaw actuators among the plurality of yaw actuators, and the total value of the outputs of the yaw actuators in operation exceeds a predetermined value In the case of the second threshold value, the operating yaw actuator is determined to be abnormal. The wind power generation system of claim 8, wherein the abnormality determination unit stops each of a part of the yaw actuators in sequence among the plurality of yaw actuators, and changes the output of the yaw actuators in operation The total value is compared with the predetermined second threshold value, and the abnormal yaw actuator is identified. The wind power generation system of claim 8 or 9, wherein the second threshold specified above is smaller than the first threshold specified above. The wind power generation system of claim 10, wherein the second threshold specified above is obtained by multiplying the ratio of the number of partial yaw actuators to be stopped in the total number of the plurality of yaw actuators by the above A predetermined first threshold value is set.

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