JP4626266B2 - Wind turbine generator, wind turbine generator control method, and computer program - Google Patents

Description

  The present invention relates to a technique for avoiding a situation in which a flying object collides with a blade when there is a flying object (mainly birds) approaching the wind power generator, and a technique related thereto.

The wind speed and direction are measured at the installation site of the wind power plant in order to grasp the wind conditions.
For example, a Doppler soda (Doppler sound wave radar) oscillates a sound wave having a constant frequency of several thousand Hz at an interval of several seconds from an arbitrary point in the field toward the sky. Sound waves collide with and reflect particles such as water vapor and dust contained in the wind in the atmosphere. The reflected wave is caught by a large cylindrical body, and the wind speed is calculated based on the reflected wave modulated by the Doppler effect.
It is also possible to calculate the direction of the wind by setting the number of cylindrical bodies for receiving and transmitting sound waves to about three and varying the inclination angle and direction of each.

Laser Doppler (light wave radar) emits laser light and receives scattered light from dust floating in the atmosphere. Since the received light is subjected to the Doppler effect due to the influence of the wind, it is a technique for analyzing the frequency shift amount of the light and obtaining the wind speed and direction.
For example, there is a technique disclosed in Patent Document 1 as a technique for measuring the wind direction and wind speed at a wind turbine construction planned site for wind power generation.

JP 2004-101265 A

  The wind turbine generator is designed according to the wind conditions of the installation site, but any wind turbine generator has a limit in the durability performance against external force accompanying wind power. Therefore, the following “limit adjustment mechanism” is provided to protect against the external force exceeding the limit associated with wind power. That is, when a wind speed exceeding a predetermined level is predicted or detected by measuring wind speed or obtaining weather forecast information, the blade angle is selected to reduce the rotation efficiency for that wind, or the wind is allowed to escape. A mechanism for selecting such a blade angle is provided.

  Now, a wind power generator is installed by selecting a place where wind blows stably. Often, a large number of large wind power generators are installed in locations away from urban areas. In places with excellent wind conditions, wind farms with dozens or hundreds are also formed.

In recent years, wind power generators have become larger in order to improve the output per unit.
A typical large wind power generator is installed in a tower about 30 to 80 meters in height, and the blade of such a wind power generator is 20 to 50 meters, so the highest level reaches 130 meters from the ground. .

Although conceptually shown in FIG. 9, this height is the height of a bird that lives in the vicinity of the place where the wind power generator is installed or the height of a cruise flight of migratory birds. There is also.
On the other hand, the flying birds have an accident (bird strike) that hits the blade and kills it because it is difficult to see the blade rotating at high speed.
Furthermore, although an anemometer and an anemometer as shown in FIG. 10 are provided, these are only post-measurements, and the flying object blown off by the strong wind may collide with the blade and break the blade.

For wind turbine generators to be installed in the future, bird strikes can be avoided to some extent by information from wild bird conservation organizations and thorough environmental assessments.
However, in existing wind farms, there is no means to avoid bird strikes.
In addition, since it is impossible to fully grasp and regulate the movement of birds, which are living creatures, there is a limit to the suppression of bird strikes through thorough environmental surveys.
It should be noted that the flying object blown off by the strong wind collides with the blade to prevent the blade from being damaged.

The problem to be solved by the present invention is to provide a technology capable of reducing blade damage and bird strike caused by flying objects in a wind turbine generator.
An object of the invention described in claims 1 to 3 is to provide a wind turbine generator capable of reducing blade damage and bird strike caused by flying objects.
Another object of the invention according to claim 5 claims 4 to provide a control process of a wind turbine generator capable of reducing the damage and bird strikes blades by flying objects.

Another object of the invention according to claims 6 to claim 7 is to provide a control program of the wind power generation device capable of reducing the damage and bird strikes blades by flying objects.
An object of the invention described in claims 8 to 10 is to provide a wind turbine generator related technique capable of reducing blade damage accidents due to gusts in addition to the object of the invention described above.

First, in this application, a tower erected on the ground, a nacelle fixed to the tower, a plurality of blades fixed to the nacelle via a hub, and a flying object in front of the windward. Provided is an invention relating to a wind turbine generator including a detectable obstacle search device and blade angle control means for controlling a change in blade angle including a rotation stop position .
The present invention is characterized in that when the obstacle search device detects a flying object, the blade angle control means controls to change the blade to the rotation stop position.

(Glossary)
The "flying object", other creatures, such as birds, including an object coming blown in the wind.
An “obstacle detection device” is a device that confirms the presence of flying objects by oscillating sound waves or electromagnetic waves and capturing the reflected waves, or a device that checks the presence of flying objects based on imaging and image analysis, A device that senses creatures such as birds by sensing. It is used in combination with an anemometer to catch flying objects in front of the windward. In addition, since the wind power generator is directed toward the windward, it is preferable that the wind power generator moves in synchronization with the wind power generator, such as being installed in a hub of the wind power generator.

“Rotation stop position” refers to a position where the blade does not rotate even if it receives wind. Typically, it is a feathering position or a sufficient deceleration of the rotation speed, but assists the brake to stop the blade rotation. In the case of use, the case where the rotation of the blade is stopped with the brake as the main is also included. As a rotation deceleration control means, a pitch controller that changes the pitch angle of the entire blade, and a blade shape and a pitch angle that loses lift, are selected, and the blade tip changes its direction by 90 degrees when stopped to serve as a brake. There is a stall controller.
In addition to the feathering position, the wind power generator is often formed so that a position that reduces the rotational efficiency according to the strong wind can be selected. This is because, if the rotation is completely stopped, it takes time to restart the operation. However, in the case of sufficient deceleration, it is easy to restart the operation, so that the power generation loss can be reduced.

(Function)
The wind power generator according to the above-described invention generates power by receiving wind and rotating the blade. Here, it is assumed that the obstacle search device detects a flying object on the windward. Then, the blade angle control means controls to change the blade to the rotation stop position. As a result, the rotation of the blade stops or slows down sufficiently.
If the blade is stopped or sufficiently slowed down, the flying bird is easy to see, so the possibility of avoiding it increases. Further, since many blades are formed in a thin shape fixed about three radially from the hub, even if the flying object is a simple object other than a bird, the probability of colliding with the blade can be reduced.

(Claim 1)
The invention according to claim 1 is a tower erected on the ground, a nacelle fixed to the tower, a plurality of blades fixed to the nacelle via a hub, and a windward front The present invention relates to a wind turbine generator including an obstacle search device capable of detecting a flying object and blade angle control means for controlling a change in blade angle including a rotation stop position.
The obstacle searching device continuously searches for flying objects, and when it is determined that the flying objects are approaching based on the continuous searching, the blade angle control means causes the blade to rotate to a rotation stop position. It is characterized in that it is controlled to change to

(Glossary)
Since the “obstacle search device” “searches continuously for flying objects”, it has a function of storing data relating to flying objects for a predetermined time or performing a comparison operation with the immediately preceding data. If the flying object is a bird, it may be faster than the wind speed.

(Function)
The invention according to claim 1 controls the change to the rotation stop position only when a flying object approaches . Since it is determined whether or not the approaching object has been detected, once a flying object is detected but it is determined that the approaching object is not approaching, there is little possibility of a collision and it is not necessary to stop power generation wastefully.
The wind power generator described above is effective when the movement of flying objects is extremely fast, or when it is impossible to predict whether the object has approached even after continuous exploration or whether the possibility of collision is high.

( Claim 2 )
The invention according to claim 2 limits the wind power generator according to claim 1 .
That is, it has an arrival time calculation means for calculating the expected arrival time of the flying object detected by the obstacle exploration device, and the blade angle control means changes the blade angle to the rotation stop position before reaching the expected arrival time. It relates to a wind turbine generator that is to be controlled.

(Glossary)
"Arrival time calculation means" means that when the obstacle exploration device uses sound waves or electromagnetic waves, it continuously explores flying objects and predicts the arrival time of flying objects from the speed of sound and distance It is.
In other words, when the approach of the flying object is detected and the rotation is judged to be stopped, the blade angle control means secures the time necessary for changing the blade angle and stopping the rotation of the blade (for example, around 5 seconds). It is necessary to search for flying objects as far away as possible.

(Function)
The arrival time calculation means calculates the expected arrival time of the flying object detected by the obstacle search device. Then, the blade angle control means controls to change the blade angle to the rotation stop position before reaching the expected arrival time. As a result, it is possible to increase the probability of preventing blade breakage and bird strike due to flying objects.

( Claim 3 )
The invention according to claim 3 limits the wind power generator according to claim 1 or claim 2 .
In other words, the obstacle exploration device can perform a wide-angle exploration and a narrow-angle exploration, and performs a wide-angle exploration until it detects a flying object, and if it detects a flying object, it aims at the flying object. It is related to the wind power generation apparatus that has been changed to the narrow-angle exploration and decided to determine whether or not the flying object approaches.

(Function)
The angle that the obstacle search device can search is preferably as large as possible. However, when the wind speed is high and the speed of the flying object is high, a wide-angle exploration causes a large error in capturing the continuous movement of the flying object and calculating the estimated arrival time.
Therefore, when a flying object is detected, the configuration is changed to a narrow-angle exploration aiming at the flying object, and a configuration is adopted in which it can be determined whether or not the flying object is approaching.

(Delete)

( Claim 4 )
According to a fourth aspect of the present invention, there is provided a wind turbine comprising a tower erected on the ground, a nacelle fixed to the tower, and a plurality of blades rotatably fixed to the nacelle via a hub. The present invention relates to a method for controlling a power generator.
That is, a flying object detection procedure for continuously exploring flying objects, a flying object approach detection procedure for determining whether a flying object has approached when a flying object is detected in the flying object detection procedure, and A rotation stop procedure for changing the blade to a rotation stop position when it is determined in the projectile approach detection procedure that a flying object has approached.

( Claim 5 )
The invention described in claim 5 limits the control method of the wind turbine generator described in claim 4 .
In other words, when a flying object is detected in the flying object detection procedure, it has an arrival time calculation procedure that calculates the expected arrival time of the flying object. The rotation stopping procedure stops the rotation of the blade before reaching the expected arrival time. It is characterized by changing to a position.

(Delete)

( Claim 6 )
According to a sixth aspect of the present invention, there is provided a wind turbine comprising a tower erected on the ground, a nacelle fixed to the tower, and a plurality of blades rotatably fixed to the nacelle via a hub. The present invention relates to a power generator control program.
The control program includes a flying object detection procedure for continuously exploring flying objects, and a flying object approach detection procedure for determining whether or not a flying object has approached when a flying object is detected in the flying object detection procedure. And a computer program for causing the control computer of the wind power generator to execute a rotation stop procedure for changing the blade to the rotation stop position when it is determined that the projectile approached in the projectile approach detection procedure. It is.

( Claim 7 )
The invention of claim 7 is obtained by limiting the computer program of claim 6.
In other words, when a flying object is detected in the flying object detection procedure, it has an arrival time calculation procedure that calculates the expected arrival time of the flying object, and the rotation stopping procedure stops the rotation of the blade before reaching the expected arrival time. It is characterized by changing to a position.

( Claim 8 )
The invention according to claim 8 limits the wind power generator according to any one of claims 1 to 3 .
In other words, the nacelle or hub is provided with a Doppler anemometer capable of measuring the wind speed in front by receiving and oscillating sound waves or electromagnetic waves. When the Doppler anemometer detects a wind speed exceeding a predetermined level, the blade angle control means The present invention relates to a wind turbine generator in which the blade angle is changed so that the blade is not damaged by the wind speed.

(Glossary)
A “Doppler anemometer” oscillates a sound wave or electromagnetic wave, and measures the speed difference based on the Doppler effect of the sound wave or electromagnetic wave reflected and reflected by a reflector such as dust contained in the wind. An anemometer to calculate. The mounting position may be the inside of the hub, the top of the nacelle, or the left and right.

(Function)
The wind speed on the windward side of the wind power generator is measured by a Doppler anemometer using the Doppler effect by receiving and oscillating sound waves or electromagnetic waves. When the Doppler anemometer detects a wind speed exceeding a predetermined level, the blade angle control means changes the angle of the blade. For example, when a wind speed exceeding the limit is detected, feathering is used to escape the wind and reduce damage to blades and towers.
With the operation described above, it is possible to take measures against gusts such as changing the blade angle by detecting gusts in advance without using an observation tower.

( Claim 9 )
The invention according to claim 9 limits the method for controlling the wind turbine generator according to claim 4 or claim 5 .
That is, the wind turbine generator includes a Doppler anemometer capable of measuring the wind speed in front by receiving and oscillating sound waves or electromagnetic waves,
A flying object detection procedure for detecting a flying object in front of the windward and a rotation stopping procedure for controlling the blade to change to the rotation stop position when the flying object is detected in the flying object detection procedure. The present invention relates to a method for controlling a wind turbine generator.

( Claim 10 )
The invention according to claim 10 limits the computer program according to claim 6 or claim 7 .
In other words, the wind turbine generator is equipped with a Doppler anemometer capable of measuring the wind speed ahead by receiving and oscillating sound waves or electromagnetic waves, and the flying object detection procedure for detecting the flying object forward and the flying object detection procedure. When a flying object is detected, a computer program that causes a control computer of the wind power generator to execute a rotation stop procedure for controlling the blade to change to a rotation stop position.

The computer program according to claims 6 to 7 and claim 10 may be formed into a chip to be a blade control device of a wind power generator. It can also be stored in a recording medium and provided. Here, the “recording medium” is a medium that can carry a program that cannot occupy space by itself, such as a flexible disk, a hard disk, a CD-R, an MO (magneto-optical disk), a DVD- R and the like.

According to the invention described in claims 1 to 3 , it is possible to provide a wind power generator capable of reducing blade damage and bird strike caused by flying objects.
Moreover, according to the invention of Claim 4 or Claim 5 , the control process of the wind power generator which can reduce the damage of the blade by a flying object and a bird strike was able to be provided.

Moreover, according to the invention of Claim 6 or Claim 7 , the control program of the wind power generator which can reduce the damage of the blade by a flying object and a bird strike was able to be provided.
Furthermore, according to the invention described in claims 8 to 10 , in addition to the object of the invention described above, it is possible to provide a wind turbine generator related technique capable of reducing blade damage accidents due to gusts.

Embodiments of the present invention will be described with reference to the drawings.
The drawings used here are FIGS. 1 to 7. FIG. 1 is a conceptual diagram showing the first embodiment, and FIG. 2 is a flowchart showing a control process. FIG. 3 is a graph showing wind speed and power generation amount. FIG. 4 is a conceptual diagram of the second embodiment. FIG. 5 is a conceptual diagram showing imaging and image analysis. FIG. 6 is an image diagram of the emitted wave and the reflected wave when there are flying objects. FIG. 7 is an image diagram of the emitted wave and the reflected wave when there is no flying object. FIG. 8 is a conceptual diagram showing the third embodiment.

(First embodiment)
A first embodiment shown in FIG. 1 includes a tower erected on the ground, a nacelle fixed to the tower, a plurality of blades fixed to the nacelle via a hub, and a wind The present invention relates to a wind turbine generator that includes an obstacle search device that can detect flying objects in front and above, and blade angle control means that controls a change in blade angle including a rotation stop position.

As the obstacle exploration device, a device that confirms the presence of a flying object by oscillating a sound wave or electromagnetic wave and capturing the reflected wave is adopted instead of a device that confirms the presence of a flying object based on imaging and image analysis. .
If a heat sensing device is used, it can only detect flying objects that are higher in temperature than the surroundings, such as birds and other creatures. There is an advantage that the flying object can be detected accurately.

The nacelle is equipped with an anemometer, and the wind power generator is turned upwind by obtaining the output from the anemometer. The obstacle exploration device is a device that confirms the presence of a flying object by oscillating sound waves or electromagnetic waves (emitted wave f1) and capturing the reflected wave (f2). It is installed in the wind turbine generator hub and moves in synchronization with the wind turbine generator.
When the obstacle search device confirms the presence of a flying object, the obstacle control device is controlled as shown in the flowchart of FIG.

(Figure 2)
FIG. 2 shows an example of control. The wind power generator generates electricity by receiving wind and rotating the blades. Here, if the obstacle search device does not detect a flying object on the windward, the operation is continued.
Assume that a flying object is detected. Then, by continuously searching for flying objects, data relating to flying objects is stored for a predetermined time or compared with the immediately preceding data. When the flying object approaches, the predicted arrival time of the flying object is calculated from the flight speed V and the distance X, and the blade angle control means controls the blade to change to the rotation stop position (feathering). To do. Then, the rotation of the blade is stopped before the predicted arrival time of the flying object.
The control program as described above is incorporated in the blade control device.

  If the blade is stopped, it is easy to see the flying bird, so the possibility of avoiding it increases. Further, since many blades are formed in a thin shape fixed about three radially from the hub, even if the flying object is a simple object other than a bird, the probability of colliding with the blade can be reduced. Since it is determined whether or not the approaching object has been detected, once a flying object is detected but it is determined that the approaching object is not approaching, there is little possibility of a collision and it is not necessary to stop power generation wastefully.

(Figure 3)
FIG. 3 shows the relationship between the wind speed and the amount of power generation. The blade is adjusted so that it can be operated at the rated wind speed. When the wind speed exceeds a predetermined level (cutout wind speed), power generation is stopped by feathering. In the present embodiment, the change to feathering is executed even when a flying object approaches.

(Fig. 4)
The embodiment shown in FIG. 4 differs from the embodiment shown in FIG. 1 in that the obstacle searching device is not built in the hub but fixed on the nacelle. If the blade is rotating, it will be an obstacle to the obstacle search device, but the oscillation timing of the sound wave or electromagnetic wave may be controlled so as to avoid the rotating blade.

  According to the wind turbine generator according to the embodiment described above, it is possible to provide a wind turbine generator capable of reducing the collision of flying objects with the blade and the bird strike.

When installing the obstacle exploration device described above in a wind farm, it is desirable to provide an obstacle exploration device for all wind power generators.
However, when not all of them are provided, when the obstacle search device detects an obstacle, the blade angle control in the wind turbine generator that is not provided can be performed. Then, it contributes to reducing the collision of the flying object with the blade and the bird strike.

In the above-described embodiment, the wind power generation apparatus considering only the bird strike from the windward has been described, but it is naturally possible to provide a plurality of obstacle exploration apparatuses around the wind power generation apparatus or the wind farm. This is because flying objects need only consider the windward, but birds may fly regardless of the direction of the wind.
If any obstacle search device of multiple obstacle search devices detects an obstacle, the wind power generation device or all wind power generation devices that are expected to collide will be feathered or sufficiently slowed down. It is to be controlled.

(Fig. 5)
The obstacle search apparatus using imaging and image analysis will be described in more detail with reference to FIG.
When the obstacle exploration device catches a flying object, the vertical length in which the flying object is accommodated is Y. Also, θ is half of the search angle at which the obstacle search device stores the flying object. The time when the flying object was first captured was T2, the search angle at this time was θ2, the arrival time to the wind turbine generator was T1, and the search angle at this time was θ1, and the arrival distance of the flying object at T1 was X, Let V be the flying speed of the flying object (the flying speed including the wind speed).

Then
tanθ1 = Y / 2X
tanθ2 = Y / 2 (X + V × T)
V = X (tan θ1−tan θ2) / T / tan θ2
The arrival time T1 to the wind turbine generator is
T1 = X / V
Can be predicted.

(Fig. 6)
It shows how the emission wave (f1) and the reflected wave (f2) are captured in the relationship between the signal and the frequency when there is a flying object. In this example, the reflected wave (f2) is larger in both signal and frequency than the emitted wave (f1).

(Fig. 7)
This shows how the emission wave (f1) and the reflected wave (f3) are captured in the relationship between the signal and the frequency when there is no flying object (that is, only the wind blows). Although the frequency of the reflected wave (f2) was higher than that of the emitted wave (f1), it did not change as much as when there was a flying object.

  It is possible to provide a control algorithm for accumulating data based on the examples shown in FIGS. 6 and 7 and comparing the accumulated data instantaneously to determine whether or not a flying object is approaching. .

(Fig. 8)
The embodiment shown in FIG. 8 is not a device for detecting the presence of a flying object by detecting a reflected wave by oscillating a sound wave or electromagnetic wave as an apparatus for detecting a flying object, but based on imaging and image analysis. A device that confirms the presence of flying objects is adopted.
That is, irradiate minute particles (tracer) mixed in the fluid with laser light, etc., and continuously acquire the scattered light as an image. The approach is detected.

This flying object detection device has a laser oscillation device built in the hub, a ring-shaped camera moving body fixed around the tower near the ground, and a tower that can circulate around the upper surface of the camera moving body. And a fixed camera.
The camera is a CCD or C-MOS sensor, and photographs sheet-like laser light oscillated by a laser oscillation device from below. Moreover, it is formed so that it can move on the camera moving body so as to face the windward in synchronism with the nacelle based on the wind direction detected by the anemometer.

First, a laser oscillation device irradiates a sheet-like laser beam toward the windward side of a wind power generator. Subsequently, the camera continuously acquires the tracer captured by the laser light applied to the flow field as captured image data. At this time, the timing of photographing by the camera is synchronized with the laser beam by the control means.
The captured image data obtained continuously is processed for wind condition analysis by an image processing means by a computer. That is, even when the approach of a flying object is detected by image analysis, the blade angle and the like are controlled to prevent the blade from being damaged due to a gust of wind.

  It is also possible to acquire the wind speed and wind direction on the wind using a plurality of acquired captured image data. When the wind speed is higher than a predetermined value, it is possible to prevent the blade from being damaged due to the gust by controlling the angle of the blade.

It is a conceptual diagram which shows 1st embodiment. It is a flowchart which shows an example of control. It is a graph which shows a wind speed and electric power generation amount. It is a conceptual diagram which shows 2nd embodiment. It is a conceptual diagram which shows an imaging and image analysis. It is an image figure of the emitted wave and reflected wave in the case of a flying object. It is an image figure of the emitted wave and reflected wave when there are no flying objects. It is a conceptual diagram which shows 3rd embodiment. It is a conceptual diagram which shows the conventional wind power generator. It is a figure which shows a general anemometer and an anemometer.

Claims (10)

A tower erected on the ground, a nacelle fixed to the tower, a plurality of blades fixed to the nacelle via a hub, and obstacles capable of detecting flying objects in front of the windward A wind turbine generator comprising a survey device and blade angle control means for controlling the angle change of the blade including the rotation stop position,
The obstacle exploration device continuously explores flying objects,
A wind turbine generator in which the blade angle control means controls to change the blade to the rotation stop position when it is determined that the flying object has approached based on the continuous exploration. It has an arrival time calculation means for calculating the expected arrival time of the flying object detected by the obstacle exploration device,
The wind power generator according to claim 1, wherein the blade angle control means performs control so as to change the angle of the blade to the rotation stop position before reaching the expected arrival time. Obstacle exploration devices are capable of wide-angle exploration and narrow-angle exploration,
A wide-angle exploration is performed until a flying object is detected, and if a flying object is detected, it is changed to a narrow-angle exploration aiming at the flying object to determine whether or not the flying object approaches. The wind power generator according to any one of claims 1 and 2 . A wind turbine generator control method comprising a tower erected on the ground, a nacelle fixed to the tower, and a plurality of blades fixed to the nacelle via a hub so as to be rotatable,
Projectile detection procedure for continuously exploring projectiles,
A flying object approach detection procedure for determining whether or not a flying object has approached when a flying object is detected in the flying object detection procedure;
A method for controlling a wind turbine generator, comprising: a rotation stopping procedure for changing the blade to a rotation stop position when it is determined that the flying object has approached in the flying object approach detection procedure. It has an arrival time calculation procedure that calculates the expected arrival time of a flying object when a flying object is detected in the flying object detection procedure,
The method of controlling a wind turbine generator according to claim 4, wherein the rotation stopping procedure is such that the blade is changed to a rotation stopping position before reaching the expected arrival time. A control program for a wind turbine generator comprising a tower erected on the ground, a nacelle fixed to the tower, and a plurality of blades fixed to the nacelle via a hub so as to be rotatable,
The control program includes projectile detection procedures for continuously exploring projectiles,
A flying object approach detection procedure for determining whether or not a flying object has approached when a flying object is detected in the flying object detection procedure;
A computer program for causing a control computer of a wind power generator to execute a rotation stopping procedure for changing the blade to a rotation stopping position when it is determined that the flying object approaches in the flying object approach detection procedure. It has an arrival time calculation procedure that calculates the expected arrival time of a flying object when a flying object is detected in the flying object detection procedure,
The computer program according to claim 6 , wherein the rotation stop procedure changes the blade to a rotation stop position before reaching the expected arrival time. The nacelle or hub is equipped with a Doppler anemometer that can measure the wind speed in front by receiving and oscillating sound waves or electromagnetic waves,
In that case the Doppler anemometer detects a predetermined or more wind speed, from claim 1 blade angle control means has decided to change the angle of the blade as the blade by the wind speed is not damaged in any of claims 3 The wind power generator described. In the control method of the wind power generator in any one of Claim 4 or Claim 5 ,
The wind turbine generator is equipped with a Doppler anemometer that can measure the wind speed ahead by receiving and oscillating sound waves or electromagnetic waves,
A flying object detection procedure for detecting flying objects in front of the windward;
And a rotation stopping procedure for controlling the blade to change to a rotation stop position when a flying object is detected by the flying object detection procedure. In the computer program in any one of Claim 6 or Claim 7 ,
The wind turbine generator is equipped with a Doppler anemometer that can measure the wind speed ahead by receiving and oscillating sound waves or electromagnetic waves,
A flying object detection procedure for detecting flying objects in front of the windward;
A computer program for causing a control computer of a wind power generator to execute a rotation stopping procedure for controlling the blade to change to a rotation stopping position when a flying object is detected by the flying object detection procedure.

Images