JP4690776B2 - Horizontal axis windmill - Google Patents

Horizontal axis windmill Download PDF

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Publication number
JP4690776B2
JP4690776B2 JP2005159848A JP2005159848A JP4690776B2 JP 4690776 B2 JP4690776 B2 JP 4690776B2 JP 2005159848 A JP2005159848 A JP 2005159848A JP 2005159848 A JP2005159848 A JP 2005159848A JP 4690776 B2 JP4690776 B2 JP 4690776B2
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Prior art keywords
yaw
rotor
control device
nacelle
step
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JP2006336505A (en
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茂雄 吉田
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富士重工業株式会社
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Priority claimed from CN201210020023.XA external-priority patent/CN102518557B/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • Y02E10/721Blades or rotors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • Y02E10/723Control of turbines

Description

  The present invention relates to standby in a storm in an upwind type horizontal axis wind turbine.

As is well known, so-called horizontal axis wind turbines are widely used for commercial purposes. A general horizontal axis wind turbine supports the rotor via a rotor in which at least two blades are attached radially from a hub, and a main shaft that is connected to the hub and extends in a substantially horizontal direction. It has a nacelle and a tower that is installed in a substantially vertical direction and supports the nacelle in a yaw-rotatable manner.
In addition, it has also been conventionally performed to provide control means such as a yaw driving means that can freely control yaw rotation of the nacelle, a yaw brake that brakes the yaw rotation, and a main shaft brake that brakes the rotation of the rotor in the horizontal axis wind turbine. ing.
Many of today's commercial wind turbines have an upwind horizontal axis wind turbine configuration. The upwind type horizontal axis wind turbine is a horizontal axis wind turbine configured to generate electricity by rotating a rotor disposed on the windward side of the tower.

  Usually, the design strength of a windmill is greatly influenced by the load received during a standby state during a storm. It is necessary to set the windmill load during a storm assuming that a power outage will also occur. Hereinafter, typical prior arts 1 to 5 relating to a standby method for a horizontal axis wind turbine will be described.

[Prior art 1]
Prior art 1 is a general upwind / stall control wind turbine, which is configured to wait for a storm by fixing a main shaft with a brake. Basically, the yaw is fixed during standby. Some yaw control makes the rotor parallel to the wind direction to reduce the load. Even if yaw control is possible, if the power necessary for yaw control is cut off or if any device related to yaw control breaks down, there is a possibility of receiving a storm from all directions. Therefore, it is necessary to design the storm from all directions. In general, in the case of a stall controller, a large load is generated during a storm from the front and back.

[Prior art 2]
Prior art 2 is a general upwind pitch controller, which idles the rotor, fixes the yaw, and waits in a storm. Some pitch controllers use yaw control to direct the rotor to the windward to reduce the load, but this has a power supply necessary for yaw control and each device functions without failure. This is a prerequisite. In general, in the case of a pitch controller, a large load is generated during a side wind and a storm from the front / back. Model A shown in FIG. 3 corresponds to the standby mode of Conventional Technique 2.

[Prior art 3]
Prior art 3 is an upwind pitch controller that secures the feathers of all wings, then reverses the nacelle azimuth by about 180 [deg] by yaw control, holds it with a weak yaw brake, and waits in a storm. It is. Thereby, at the time of a storm, a rotor can go downwind and the load to a tower can be reduced. The standby mode of the prior art 3 is similar to the prior art 5 in appearance. The model B shown in FIG. 3 corresponds to the standby mode of the prior arts 3 and 5.

[Prior Art 4]
Prior art 4 is a downwind windmill / pitch controller, which secures the feathers of all the blades, idles the rotor, and stands by during a storm as free yaw. Thereby, at the time of a storm, a rotor can wind downwind and the load which acts on a tower top part can be reduced. The standby mode of the prior art 4 is similar in appearance to the embodiment of the present invention. The model C shown in FIG. 3 is a standby mode of the embodiment of the present invention, and the standby mode of the prior art 4 also corresponds to this.

[Prior art 5]
Prior art 5 is a downwind windmill / pitch controller described in Patent Document 1, and after securing the feathers of all the blades, the pitch angle is changed by about 180 [deg] for each blade, and a storm with free yaw It is something that waits sometimes. When receiving wind from the trailing edge of the blade, the maximum lift coefficient is greatly reduced when receiving wind from the trailing edge, and the yaw holding torque is also small, so the load generated at other parts is also small. . The standby mode of the prior art 5 is the same as that of the prior art 3 in appearance. The model B shown in FIG. 3 corresponds to the standby mode of the prior arts 3 and 5.
Japanese Patent Application No. 2004-193271

Even with a 2 MW class wind turbine, the strength problem can be avoided if it is well designed according to the scale of the wind turbine by the above-described conventional technology. However, as the size of the blade further increases in the future, the rigidity of the blade will further decrease, and the natural frequency will decrease. The problem of becoming is expected.
In conventional upwind horizontal axis wind turbines (Prior Art 1 to 3), windstorms from the vicinity of the trailing edge of the blade cannot be avoided and flutter occurs regardless of the standby mode during windstorms. There are two types of flutter modes that are expected to occur:
Stall flutter: The lift gradient with respect to the angle of attack becomes negative in the stall region of the wing, and the aerodynamic term gives a negative damping effect in this region, increasing the instability tendency. This occurs even on wings with high torsional rigidity.
Bending / twisting flutter: Since a wing is an asymmetrical and long structure, twisting occurs in bending. In particular, when a storm from the vicinity of the trailing edge of the blade is received, the blade is bent under a load. However, since the torsion is coupled to this, the angle of attack flowing into the blade is changed, and it tends to be unstable. This rarely occurs on wings with high torsional rigidity.

  The present invention has been made in view of the above problems in the prior art, and in an upwind type horizontal axis wind turbine, a standby mode in which the rotor and blade trailing edge are leeward even if the yaw driving means is not functioning during a storm. It is an object of this standby mode to reduce the occurrence of flutter by avoiding storms from the trailing edge of the blade, and consequently to reduce the design load during storms such as blades.

The invention according to claim 1 for solving the above-described problems includes a rotor having a hub and at least two blades;
A nacelle that pivotally supports the rotor via a main shaft connected to the hub;
A tower that supports the nacelle in a yaw-rotating manner;
An independent pitch control device for independently controlling the pitch angle of the blade;
A yaw control device for controlling the yaw rotation of the nacelle,
When the wind speed is less than or equal to a predetermined value, the rotor is placed upwind from the tower under the control of the yaw control device, and wind power is used through rotation of the rotor, and the operation mode is entered when the wind speed exceeds the predetermined value. In an upwind type horizontal axis wind turbine having a standby mode for preparing and waiting,
(1) The independent pitch control device includes a first step in which all the blades are feathered when the wind speed exceeds the predetermined value, and a second step in which the blades are sequentially turned one by one after the first step. And a third step of holding all the blades in a reverse feather state until the return to the operation mode after the second step,
(2) The yaw control device has a control operation of controlling the yaw brake to a braking value that allows yaw rotation by a torque around a yaw axis loaded on the nacelle by wind force at a wind speed exceeding the predetermined value,
A horizontal axis wind turbine characterized in that, as the standby mode, the rotor is moved downwind from the tower by executing the control operations (1) and (2).

  The invention according to claim 2 is characterized in that the yaw control device executes the control operation of (2) before the independent pitch control device executes the second step. It is an axial windmill.

  The invention according to claim 3 is characterized in that the yaw control device executes the control operation (2) before or simultaneously with the independent pitch control device executing the first step. It is a horizontal axis windmill.

According to the present invention, when the wind speed exceeds a predetermined value and when waiting for the operation of the wind turbine for power generation or the like, the load load due to the storm is reduced by making all the blades feather in the first step. Can do. In this first step, the trailing edge of all blades faces the tower side, and in the subsequent second step, the blades are turned in reverse feathers one by one so that the leading edge of the blade faces the tower side. It becomes. If all the blades are reversed at the same time, the rotor reaches overspeed and causes a serious accident. However, in the second step, the feathers are reversed one by one in sequence, so the load caused by the storm should be kept at a level where there is no problem. Can do. In the second step, the torque around the yaw axis loaded on the nacelle by the wind force can be increased in the process in which the blade moves from the feather to the inverted feather state one by one in the second step. Thereafter, in the third step, all the blades are held in a reverse feather state until the operation mode is restored.
On the other hand, since the yaw brake is controlled to a braking value that allows yaw rotation by the torque around the yaw axis loaded on the nacelle by the wind force, the nacelle is yawed by the wind force so that the rotor is arranged from the windward side of the tower to the leeward side Rotate the nacelle to make the rotor go downwind from the tower.
When the rotor is placed leeward from the tower, the leading edge of all the blades is facing the tower side by the completion of the second step, and this is held by the third step. Since the wind is received, the load applied to the blade can be reduced while avoiding the generation of flutter.
As described above, the nacelle yaw-rotates by wind power and causes the rotor to go downwind from the tower. Therefore, even if the yaw driving means is not functioning, it is possible to secure a standby mode in which the rotor and blade trailing edge go downwind. There is an effect that the generation of flutter can be reduced by avoiding the storm from the trailing edge, and the design load during the storm can be reduced.

  Even when the control operation (2) is executed after the completion of the second step, a torque around the yaw axis sufficient to rotate the nacelle is generated by the wind condition, so that the rotor is arranged leeward of the tower. The nacelle can be rotated to the standby posture.

  Preferably, the control operation (2) is executed before the execution of the second step. In the process of shifting the blade from the feather to the state of inverted feather one by one in the second step, the torque around the yaw axis loaded on the nacelle by the wind force becomes relatively large. Thus, the nacelle can be rotated so that the rotor is more surely arranged on the lee of the tower, and the standby posture can be shifted.

  More preferably, the control operation (2) is executed before or simultaneously with the execution of the first step. As a result, the nacelle is rotated by the torque around the yaw axis that is applied to the nacelle by the wind force generated in any of the first step to the third step, so that the rotor is more surely placed leeward of the tower, and waiting. It is possible to shift to a posture.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention. FIG. 1 is a plan view of an upwind horizontal axis wind turbine according to this embodiment as viewed from above. FIG. 2 is a block diagram showing a portion related to the present case in the configuration of the control unit mounted on the upwind type horizontal axis wind turbine of the present embodiment.

As shown in FIG. 1, the horizontal axis windmill of this embodiment is provided with the tower 1, the nacelle 2, the hub 3, and the three blades 4a-4c.
The nacelle 2 pivotally supports a rotor composed of the hub 3 and blades 4a to 4c via a main shaft (not shown) connected to the hub 3. The tower 1 supports the nacelle 2 so that it can rotate freely.
An anemometer and an anemometer (not shown) are attached to the outer surface of the nacelle 2.

  Inside the nacelle 2 are housed power transmission devices such as a speed increaser, a generator, and a main shaft brake (not shown), and a main shaft is coupled to each of these power transmission devices.

  The main shaft has a tip protruding outside the nacelle 2, and a rotor is attached to the tip of the main shaft so as to rotate together with the main shaft.

  The rotor has a hub 3 connected to the main shaft at the center, and three blades 4 a to 4 c are radially attached to the circumferential surface of the hub 3 in the rotation direction. The blades 4a to 4c are formed in a wing shape having an asymmetric cross-sectional shape.

  As shown in FIG. 2, the control unit of the horizontal axis wind turbine according to the present embodiment includes an anemometer 10, an anemometer 13, a control device 16, a pitch driving device 11, and a yaw driving device 14. The control device 16 includes an independent pitch control device 12 and a yaw control device 15.

  The yaw driving device 14 includes a yaw brake (not shown) that detects the yaw angle of the nacelle 2 and drives the yaw rotation and brakes the yaw rotation. The yaw control device 15 gives a control signal to the yaw drive device 14 to control the yaw angle of the nacelle 2.

The pitch driving device 11 rotates the pitch angles of the blades 4a to 4c independently. The independent pitch control device 12 gives a control signal to the pitch driving device 11 and controls the pitch angles of the blades 4a to 4c independently. Each blade 4a-4c is independently controlled at least 180 degrees freely.
Note that the pitch angle is the angle at which the blade is attached to the hub. In this paper, the angle at which the efficiency is maximized is 0 deg.

  In general, in wind power generation for commercial use, there is a wind speed band suitable for power generation in consideration of mechanical strength, power generation efficiency, and safety, and power generation is not performed in a wind speed region exceeding the upper limit cut-out wind speed. In order to avoid the storm, the vehicle is controlled to stand by in a posture that can reduce the wind load as much as possible. Hereinafter, the operation mode and standby mode of the horizontal axis windmill of this embodiment will be described.

[Operation mode]
In the wind speed zone suitable for power generation, the yaw control device 15 controls the rotor based on the wind direction detected by the anemometer 10 and places the rotor on the windward side from the tower 1, and independently based on the wind speed detected by the anemometer 13, the rotor rotational speed, and the like. The pitch control device 12 controls the blades 4a to 4c to an appropriate pitch angle, and the rotor receives wind to rotate. The rotational force of the rotor is transmitted to the main shaft connected to the hub 3, coupled to the main shaft and transmitted to the generator housed in the nacelle 2, so that the kinetic energy due to the rotational motion is converted into electric energy. Converted. When the yaw driving device 14 receives the control signal from the yaw control device 15 and rotates the nacelle 2, the yaw brake is released or lightened, and when the nacelle 2 is held in a certain direction, the yaw brake torque is maximized. To.

(Standby mode)
When the anemometer 13 detects that the wind speed has exceeded the cut-out wind speed during a storm such as a typhoon, the yaw control device 15 causes the yaw rotation of the nacelle 2 due to the torque around the yaw axis loaded on the nacelle 2 by the wind power. In addition, the yaw brake is controlled to a predetermined braking value that permits the control, and the independent pitch control device 12 makes all the blades 4a to 4c feather (first step). The rotor stops and power generation is interrupted.
Thereby, the wind load acting on the blades 4a to 4c and the tower 1 is reduced. The predetermined braking value is set lower than the braking value when the nacelle 2 is held in a certain direction. When the predetermined braking value is a constant value, it is set to a high value so that the nacelle 2 does not rotate yaw vigorously when a wind exceeding the cutout wind speed is assumed. Further, the predetermined braking value may vary according to the yaw rotation of the nacelle 2. For example, even if the torque around the yaw axis applied to the nacelle 2 by the wind force is small, the nacelle 2 is reduced to allow yaw rotation, while it is large to limit the angular velocity of the nacelle 2 yaw rotation below a certain level. It may vary depending on what is done.

Next, the independent pitch control device 12 sequentially turns the blades 4a to 4c one by one into reverse feathers (second step).
Next, the independent pitch control device 12 holds all the blades 4a to 4c in a reverse feather state until the operation mode is restored (third step).

Here, referring to FIG. 1 again, the execution of the above control operation and the wind turbine operation associated therewith will be described.
First, by executing the first step, as shown in FIG. 1 (a), all the blades 4a to 4c become feathers, the rotation of the rotor is stopped, and the yaw brake is a predetermined one that allows the yaw rotation described above. It becomes a braking value.
At this time, if the torque around the yaw axis loaded on the nacelle 2 by the wind force is larger than the yaw brake torque, the nacelle 2 starts to move, and if it is smaller, the nacelle 2 stops at a constant angle.

  Next, the second step is entered. First, as shown in FIG. 1B, the blade 4a is activated to reverse the pitch angle. The torque around the yaw axis increases at the point when the pitch angle of the blade 4a passes a flat angle. The rotational force of the rotor also increases due to the lift generated in the blade 4a during the turning process of the blade 4a, but the other two blades 4b and 4c that maintain the feather state exhibit braking force against the rotation of the rotor. Even when other spindle brake means are not used, the rotor does not rotate vigorously.

Further, the blade 4a is changed to a reverse feather as shown in FIG. 1C, and thereafter the blade 4a is held in the reverse feather state until the operation mode is restored.
If the yasel rotation of the nacelle 2 starts in the process of changing the angle of the blade 4a, for example, the nacelle 2 rotates yaw as shown in FIG. Be placed.

Next, in the same manner as the first blade 4a, the second blade 4b is turned from the feather to the reverse feather, and thereafter the state of the reverse feather is maintained until the operation mode is restored (FIG. 1 (d)). .
Next, in the same manner as the first and second blades 4a and 4b, the third blade 4c is turned from the feather to the reverse feather, and thereafter the state of the reverse feather is maintained until the operation mode is restored ( FIG. 1 (e)).

Even if the yasel rotation of the nacelle 2 does not start in the process of changing the angle of the first blade 4a, similarly, in the process of changing the angle of the second and third blades 4b and 4c from the feather to the inverted feather, There is a chance to yaw the nacelle 2 and therefore with high certainty, finally the state shown in FIG. 1 (e), ie the rotor is located leeward from the tower 1, and the leading edges of all the blades 4a-4c are It is possible to ensure a standby posture facing the windward.
Since the yaw brake has a predetermined braking value that allows the yaw rotation described above, the nacelle 2 slides around the yaw axis in accordance with the change in the wind direction, and the rotor winds down from the tower.

During the standby mode in which a storm is generated, all the blades 4a to 4c receive wind from the front edge, and the load applied to the blades 4a to 4c can be reduced by avoiding the generation of flutter.
As described above, according to the horizontal axis wind turbine of the present embodiment, the nacelle 2 is yaw-rotated by the wind force and causes the rotor to wind down from the tower 1, so that the rotor and blade trailing edge are leeward even if the yaw driving means is not functioning. In this standby mode, it is possible to avoid windstorms from the trailing edge of the blade and reduce the occurrence of flutter, thereby reducing the blade and other design loads during windstorms.

  Since the rotor is in a standby mode to wind down, the nacelle 2 is yaw-rotated so that the rotor is always located on the leeward side even when the wind direction changes, so the load acting on the blades 4a to 4c and the tower 1 The load can be reduced while letting go. Therefore, for example, even during a storm such as a typhoon, the rotor is always arranged on the leeward side of the tower 1 without any special control means for maintaining the attitude of the horizontal axis wind turbine, and the load received by the wind is minimized. be able to. In addition, the design strength of the horizontal axis wind turbine can be greatly relaxed, the degree of freedom in design can be increased, and the cost can be reduced.

  Further, according to the horizontal axis wind turbine of the present embodiment, for example, in the case of a storm such as a typhoon, first, the wind acting on each blade 4a to 4c is set by setting the pitch angle of all the blades 4a to 4c to a feather state. The drag due to can be reduced. As a result, the load acting on the blades 4a to 4c and the tower 1 can be reduced.

  Moreover, since the pitch angle of each blade 4a-4c made into a feather by the independent pitch control device 12 is made into a reversal feather one by one, the blades 4a-4c and the tower 1 are compared with the case where all the blades are reversed at the same time. An increase in the applied load can be minimized. As a result, it is possible to prevent excessive drag and lift from being generated in the blades 4a to 4c, and to effectively prevent the rotor from over-rotating.

In order to verify the occurrence of flutter due to standby mode on the assumption of larger blades, models A, B, and C with significantly reduced blade rigidity are typically used for wind turbines with a diameter of 80 m (equivalent to 2 MW) where flutter does not occur. Created. The conditions and standby postures of models A, B, and C are shown in the table shown in FIG.
For each of models A, B, and C, the nacelle azimuth angle (FIG. 5), rotor rotational speed (FIG. 6), blade twist displacement (FIG. 7), and blade root flap bending (FIG. 4) shown in FIG. 8) Blade root torque (FIG. 9), yaw torque (FIG. 10), and yaw horizontal force (FIG. 11) were analyzed and output as a graph. Moreover, the main points of the analysis results, the distribution range, and the evaluation are described in the table shown in FIG.

  As described in the table shown in FIG. 3, the model A corresponds to the standby mode of the related art 2. Model B corresponds to the standby mode of the prior arts 3 and 5. Model C is the standby mode of the embodiment of the present invention, and the standby mode of the prior art 4 also corresponds to this.

  The model C, which is the standby mode of the embodiment of the present invention, has a good load reducing effect with respect to the wing flap bending / twisting and the yaw horizontal force. Further, the yaw torque is greatly improved as compared with a normal upwind machine (model A). The following items are evaluated one by one.

(1) Nacelle azimuth (see Fig. 5)
The models B and C that basically slide the yaw follow the wind direction. In the model B in which the trailing edge faces upwind, the blades vibrate in the first half (0 to 150 [sec]), and the yaw is also swung.

(2) Rotational speed (see Fig. 6)
In the models B and C that slide the yaw, the rotor basically swings slowly, but in the model B with the trailing edge facing the windward, there is blade vibration in the first half (0 to 150 [sec]). The rotor is also swung to this.

(3) Blade torsional displacement (see Fig. 7)
The same evaluation as the blade root torque applies.
(4) Blade root flap bending (see Fig. 8)
In general, there is a swing of a load accompanying rotor rotation. The first half (0 to 150 [sec]) of model B vibrates with a short period.

(5) Blade root torque (see Fig. 9)
In general, there is a swing of a load accompanying rotor rotation. A large torque is generated when storms are received from the trailing edge of the rotor, such as the first half of model B (0 to 150 [sec]) and the vicinity of 200 seconds of model A. Usually, since it is unacceptable for the pitch mechanism to be twisted back, the structure of the pitch mechanism and the blade needs to withstand this.

(6) Yaw torque (see Fig. 10)
In the models B and C that slide the yaw, the amplitude of the yaw torque is limited to a small value, and when it deviates from this, the load is released by the yaw slipping. In the models B and C, the load is significantly reduced as compared with the case of the model A with yaw holding.

(7) Yaw horizontal force (see Fig. 11)
Yaw horizontal force greatly contributes to the design of towers and foundations. In the models B and C that slide the yaw, there is a tendency to reduce the load basically, but in the model B that receives the wind from the trailing edge, a large vibration is generated and the load is increased. This tendency to reverse is seen when the blade stiffness is significantly low.

It is the top view which looked at the upwind type horizontal axis windmill of one embodiment of the present invention from the top. It is a block diagram which shows the structure of the control part mounted in the upwind type horizontal axis windmill of one Embodiment of this invention. It is the table | surface which described the conditions and analysis result of model A, B, C which concern on this invention or the standby form of a prior art. It is a graph which shows the wind condition which concerns on the conditions of analysis. It is a graph which shows the analysis result of a nacelle azimuth. It is a graph which shows the analysis result of a rotor rotational speed. It is a graph which shows the analysis result of blade torsion displacement. It is a graph which shows the analysis result of a blade root flap bending. It is a graph which shows the analysis result of a blade root torque. It is a graph which shows the analysis result of yaw torque. It is a graph which shows the analysis result of a yaw horizontal force.

Explanation of symbols

1 Tower 2 Nacelle 3 Hub 4a, 4b, 4c Blade

Claims (3)

  1. A rotor having a hub and at least two or more blades;
    A nacelle that pivotally supports the rotor via a main shaft connected to the hub;
    A tower that supports the nacelle in a yaw-rotating manner;
    An independent pitch control device for independently controlling the pitch angle of the blade;
    A yaw control device for controlling the yaw rotation of the nacelle,
    When the wind speed is less than or equal to a predetermined value, the rotor is placed upwind from the tower under the control of the yaw control device, and wind power is used through rotation of the rotor, and the operation mode is entered when the wind speed exceeds the predetermined value. In an upwind type horizontal axis wind turbine having a standby mode for preparing and waiting,
    (1) The independent pitch control device includes a first step in which all the blades are feathered when the wind speed exceeds the predetermined value, and a second step in which the blades are sequentially turned one by one after the first step. And a third step of holding all the blades in a reverse feather state until the return to the operation mode after the second step,
    (2) The yaw control device has a control operation of controlling the yaw brake to a braking value that allows yaw rotation by a torque around a yaw axis loaded on the nacelle by wind force at a wind speed exceeding the predetermined value,
    A horizontal axis wind turbine characterized in that, as the standby mode, (1) and (2) control operations are executed to cause the rotor to move downwind from the tower.
  2.   The horizontal axis wind turbine according to claim 1, wherein the yaw control device executes the control operation of (2) before the independent pitch control device executes the second step.
  3.   2. The horizontal axis wind turbine according to claim 1, wherein the yaw control device executes the control operation of (2) before or simultaneously with the execution of the first step by the independent pitch control device.
JP2005159848A 2005-05-31 2005-05-31 Horizontal axis windmill Expired - Fee Related JP4690776B2 (en)

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Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP2005159848A JP4690776B2 (en) 2005-05-31 2005-05-31 Horizontal axis windmill
CN201210020023.XA CN102518557B (en) 2005-05-31 2006-05-22 Horizontal axis windmill
EP06756444.3A EP1890034B1 (en) 2005-05-31 2006-05-22 Horizontal axis windmill
EP12152253.6A EP2450567A3 (en) 2005-05-31 2006-05-22 Horizontal axis wind turbine
US11/920,861 US8167555B2 (en) 2005-05-31 2006-05-22 Horizontal axis wind turbine
PCT/JP2006/310138 WO2006129509A1 (en) 2005-05-31 2006-05-22 Horizontal axis windmill
CN2006800193510A CN101189430B (en) 2005-05-31 2006-05-22 Horizontal axis windmill
CN201210019304.3A CN102536658B (en) 2005-05-31 2006-05-22 Horizontal axis wind turbine
EP12152285.8A EP2450568B1 (en) 2005-05-31 2006-05-22 Horizontal axis wind turbine

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JP4690776B2 true JP4690776B2 (en) 2011-06-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5329128B2 (en) * 2008-06-06 2013-10-30 学校法人明治大学 Wind power generator
KR101295260B1 (en) 2008-10-14 2013-08-09 현대중공업 주식회사 Aerogenerator that establish aileron
SE535044C2 (en) * 2009-03-05 2012-03-27 Ge Wind Energy Norway As Yaw system for a wind turbine
SE535202C2 (en) * 2009-05-05 2012-05-22 Xemc Xiangtan Electric Mfg Group Corp Lt A method and a control system for controlling an upstream wind turbines
JP5284872B2 (en) * 2009-05-22 2013-09-11 株式会社日立製作所 Horizontal axis windmill
CN103857904B (en) * 2011-05-06 2017-06-13 康道尔风能有限公司 System for making to be minimized by the torque needed for control power of going off course in the wind turbine that two vane type bands wave hinge
WO2013182201A1 (en) * 2012-06-08 2013-12-12 Vestas Wind Systems A/S Wind turbine control
JP5557937B2 (en) * 2013-02-15 2014-07-23 株式会社日立製作所 Horizontal axis windmill
CN103644074B (en) * 2013-12-09 2016-09-14 北京科诺伟业科技股份有限公司 The Anti-Typhoon control method of wind power generating set and hardware platform thereof
JP6227490B2 (en) 2014-07-03 2017-11-08 株式会社日立製作所 Downwind type windmill and its stopping method
JP6282187B2 (en) 2014-07-03 2018-02-21 株式会社日立製作所 Windmill and its stopping method
JP6248006B2 (en) 2014-07-07 2017-12-13 株式会社日立製作所 Wind power generation system
CN104405585B (en) * 2014-10-24 2017-12-15 任孝忠 4 tradition of a family mechanism of car
CN110094296B (en) * 2018-01-29 2020-06-09 江苏金风科技有限公司 Yaw control method and device of wind generating set under typhoon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003058062A1 (en) * 2001-12-28 2003-07-17 Mitsubishi Heavy Industries, Ltd. Up-wind type windmill and operating method therefor
JP2004011543A (en) * 2002-06-07 2004-01-15 Fuji Heavy Ind Ltd Horizontal axis type windmill
JP2004536247A (en) * 2000-11-23 2004-12-02 アロイス・ヴォベン Wind turbine control method
JP2006016984A (en) * 2004-06-30 2006-01-19 Fuji Heavy Ind Ltd Horizontal shaft windmill and its standby method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004536247A (en) * 2000-11-23 2004-12-02 アロイス・ヴォベン Wind turbine control method
WO2003058062A1 (en) * 2001-12-28 2003-07-17 Mitsubishi Heavy Industries, Ltd. Up-wind type windmill and operating method therefor
JP2004011543A (en) * 2002-06-07 2004-01-15 Fuji Heavy Ind Ltd Horizontal axis type windmill
JP2006016984A (en) * 2004-06-30 2006-01-19 Fuji Heavy Ind Ltd Horizontal shaft windmill and its standby method

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