JP6774172B2 - Wind power generation method - Google Patents

Description

The present invention relates to a wind power generation method capable of increasing power generation efficiency even at low wind speeds.

Wind power generators generally have a large mechanical loss, and at low wind speeds, the rotor does not rotate smoothly due to the cogging torque of the generator, and the power generation efficiency is low. In order to solve this problem, the inventor of the present application has developed a vertical axis wind turbine generator including a wind turbine having a lift type blade (see, for example, Patent Documents 1 and 2).

The vertical axis wind power generator described in Patent Documents 1 and 2 includes a rotor having a pair of vertically elongated lift type blades facing each other about the vertical spindle, and the vertical spindles are attached to both upper and lower ends of each lift type blade. By forming an inwardly inclined portion toward the direction, the airflow diffused in the vertical direction along the inner side surface of the blade is received by the inwardly inclined portion to increase the rotational force and the lift (thrust). Even under low wind speed, the rotor can rotate efficiently to improve power generation efficiency.

Japanese Patent No. 4970773

Japanese Unexamined Patent Publication No. 2011-169292

The vertical axis wind turbine described in the patent document can improve the startability of the vertical axis wind turbine, can start the rotation of the rotor even at a slight wind speed of about 1 to 1.5 m / s, and has an average wind speed. For example, it has the feature that it can generate electricity efficiently even at a low wind speed of about 2 m / s.

In addition, when the peripheral speed or rotation speed of the rotor reaches a certain value, the lift generated in the blade increases due to the Coanda effect, so that the rotation of the blade is accelerated and stall due to the power generation load is less likely to occur, resulting in higher power generation efficiency. It also has the characteristic of being enhanced.

However, since the wind direction changes constantly, the wind speed suitable for the rotor does not continue for a long time, and the rotation speed of the rotor rotating under a low wind speed becomes a peripheral speed at which the rotor can rotate efficiently by itself. If it can be accelerated, the power generation efficiency can be further improved.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wind power generation method capable of significantly increasing power generation efficiency by accelerating and rotating a rotor under a low wind speed. It is a thing.

The specific contents of the present invention are as follows.

According to the wind power generation method of the present invention, the above problems are solved as follows.
(1) On the rotating shaft of a power regenerating motor that can switch between generator mode and motor mode, which is arranged on the base of a rotor support frame having a lifting blade having an inclined portion formed at the tip. An average wind speed determination unit equipped with a wind speed meter, a rotor peripheral speed determination unit equipped with a rotation speed detection sensor, and a generator / motor switching determination unit connected to a switching circuit by connecting the vertical spindle of the rotor. , The control means including the central processing device is electrically connected to the power regeneration type motor via the switching circuit, the rotation speed detection sensor is kept close to the vertical main shaft, and an inclined portion is formed at the tip portion. The vertical main shaft of the rotor is connected to the rotation shaft of the power regeneration type motor which can switch between the generator mode and the motor mode, which is arranged on the base of the support frame of the rotor equipped with the lift type blade. In the vicinity of the rotor, control means including an average wind speed determination unit equipped with a wind speed meter, a rotor peripheral speed determination unit equipped with a rotation speed detection sensor, a generator / motor switching determination unit connected to a switching circuit, and a central processing device. The rotor is electrically connected to the power regeneration type motor via the switching circuit, the rotation speed detection sensor is kept close to the vertical main shaft, and the rotor is rotating at a low wind speed. In the rotating state
When the control means such as a wind speed meter detects a predetermined reference average wind speed of 2 m / s, the generator / motor switching determination unit in the control means switches the switching circuit to set the power regeneration type motor to the motor mode. , Accelerate and rotate until the peripheral speed or rotation speed of the rotor reaches a specific upper limit value of 5 m / s, switch the power regeneration type motor to the generator mode to generate power by wind power, and control the wind speed meter and the like. When the means again detects a predetermined reference average wind speed of 2 m / s, the power regeneration type motor is switched to the motor mode again by the control means, and the peripheral speed or the rotation speed of the rotor is set to a specific upper limit value of 5 m. A wind power generation method in which the power regenerating motor is repeatedly switched to the generator mode to generate power by wind power by accelerating and rotating until it reaches / s.

According to this method, when the wind speed detecting means detects a predetermined reference average wind speed, the power regeneration type motor is switched to the motor mode, and the rotor is accelerated and rotated until the peripheral speed or the rotation speed of the rotor reaches a specific upper limit value. After that, the motor is switched to the generator mode to rotate, so that the power generation efficiency can be significantly improved even under the condition that the amount of power generation is small under the low wind speed where the rotation speed of the rotor is low.

When the power regeneration type motor is switched to the motor mode, the cogging torque by the generator does not act on the vertical spindle, and the rotor continues to rotate due to inertia, so that the motor can quickly accelerate and rotate the rotor, and When the rotor is accelerated and rotated until the peripheral speed or rotation speed reaches a specific value, the rotor is accelerated and rotated by the lifting force even without the assistance of the motor, so the operating time in the motor mode is short. The power consumption required to operate in the motor mode is small.
Further, a vertical axis wind turbine or a horizontal axis wind turbine having a rotor having a plurality of lift-type blades having an inclined portion formed at the tip portion receives a rotational force at the inclined portion by receiving an air flow that hits the blades and diffuses toward the tip end. Since the lift (thrust) can be increased to increase the lift (thrust), the rotor rotates from low wind speed, and the faster the wind speed, the more lift (thrust) generated on the blade due to the Coanda effect, and the rotor is accelerated and efficiently. Rotate. Therefore, the power generation efficiency can be maintained high by setting the peripheral speed or the rotation speed of the rotor to a value that accelerates and rotates by the lift of the blade.

Assuming that the predetermined standard average wind speed is 2 m / s and the specific upper limit is 5 m / s, the amount of power generated by the rotor rotating at a wind speed of 2 m / s or less is small. However, when the rotor is already rotating, when the wind speed reaches the standard average wind speed of 2 m / s, it is possible to generate a predetermined amount of power. Here, the power regeneration type motor is switched to the motor mode and the power is generated from the second storage battery. When the rotor is rotated until the peripheral rotation speed of the rotor reaches a specific upper limit value of 5 m / s, the rotor rotates at a wind speed of about 5 m / s even in a wind speed of an average wind speed of 2 m / s due to the lifting force of the blade. It is possible to maintain such a state.

According to the wind power generation method of the present invention, when the wind speed detecting means detects a predetermined reference average wind speed, the power regeneration type motor is switched to the motor mode until the peripheral speed or the rotation speed of the rotor reaches a specific upper limit value. Since the motor is switched to the generator mode and rotated after the acceleration rotation, the power generation efficiency can be significantly improved even when the amount of power generation is small under a low wind speed where the rotation speed of the rotor is low.

It is a front view of the wind power generation apparatus used for carrying out the method of this invention. It is an enlarged plan view of a rotor and an arm. FIG. 3 is an enlarged cross-sectional plan view taken along line III-III of FIG. It is a flowchart for carrying out the method of this invention.

Embodiments of the present invention will be described with reference to the drawings. In the following embodiment, a case where a rotor having a blade turning radius of 1 m and a blade length of 1.2 m is provided will be described, but it is needless to say that the present invention is not limited to this.

FIG. 1 shows a wind turbine generator including a vertical axis wind turbine, which is designed to carry out the method of the present invention. The wind turbine generator 1 includes a vertical axis rotor 2, a power regeneration type motor 3, and a wind turbine. It is provided with a control means 4 for controlling the rotation speed of the above.

A plurality of upper and lower positions of the vertical spindle 5 of the rotor 2 are rotatably supported by a central portion of a support frame body 6 erected on the upper surface of the foundation G via a bearing 6A. The inner ends of two horizontal arms 7A and 7B are fixed at symmetrical positions in the upper part of the vertical spindle 5, and the outer ends of the upper and lower arms 7A and 7B are vertically connected. A pair of left and right lifting blades (hereinafter abbreviated as blades) 8 and 8 facing each other are fixed to the inner side surfaces of the upper and lower ends. The arms 7A and 7B and the blade 8 are formed of, for example, a fiber reinforced synthetic resin. The arms 7A and 7B and the blade 8 can be integrally molded.

The shape of the blade 8 is substantially the same as the blade described in Japanese Patent No. 4970773 and Japanese Patent Application Laid-Open No. 2011-169292 developed by the inventor of the present application.
That is, the chord length of the blade 8 is set to 20% to 50% of the radius of gyration of the blade 8, and the blade area is set large.

As shown in an enlarged view of FIG. 3, the shape of the cross section of the main portion 8A excluding the upper and lower ends of the blade 8 is symmetrical with respect to the inner and outer blade thicknesses of the blade thickness center line C of the main portion 8A. The blade thickness center line C is set so as to be substantially the same size and substantially overlap with the rotation locus O of the blade thickness center of the blade 8.

As shown in FIG. 2, the planar shape of the entire main portion 8A is curved in an arc shape along the rotation locus O at the center of the blade thickness, and the inner surface thereof is in the centrifugal direction from the bulging portion of the leading edge to the trailing edge. It is inclined to, and when the wind hits the inner surface from the rear, it is pushed forward.

The shape of the cross section of the main portion 8A is similar to a standard airfoil in which the blade thickness on the front side in the rotation direction is thick and the blade thickness gradually decreases toward the rear.

When the blade 8 rotates, the peripheral velocity of the outer surface becomes larger than that of the inner surface due to the difference in the radius of gyration inside and outside the blade 8, and the airflow passing backward along the outer surface is that of the inner surface. Will be faster than.

Therefore, at the trailing edge of the blade 8, the pressure of the airflow passing through the outer surface is smaller than that of the airflow passing through the inner surface, and the Coanda effect on the outer surface causes the outer surface of the trailing edge of the blade 8 to become smaller. , Pushed from the rear toward the leading edge, a thrust in the rotational direction acts on the blade 8, and the blade 8 rotates.

As shown in FIGS. 1 and 2, inwardly inclined portions 8B and 8B are formed at both upper and lower ends of the blade 8 so as to be inclined inward, that is, in the direction of the vertical spindle 5 in an arc shape. Since the inwardly inclined portion 8B is formed at the upper and lower ends of the blade 8, the airflow that tends to flow in the vertical direction along the inner and outer side surfaces of the main portion 8A due to the rotation of the blade 8 is due to the Coanda effect. Along the inner and outer surfaces of the upper and lower inward inclined portions 8B and 8B, the rotor 2 passes backward, that is, toward the W direction in FIG. 2, and the rotor 2 rotates with high rotational efficiency even at a low wind speed. ..

The power regeneration type motor 3 described above is installed on the foundation G, and the lower end portion of the vertical spindle 5 is connected to the rotor shaft thereof.
As the electric power regeneration type motor 3, for example, a known permanent magnet field type DC motor is used, and a detailed description will be described later, but with a generator that generates electricity by rotation of the vertical main shaft 5 of the rotor 2. It is possible to switch between the motor that rotates the vertical main shaft 5 and the switching circuit 9 connected to the power regeneration type motor 3. It is also possible to use a permanent magnet type AC synchronous motor as the power regeneration type motor 3.

The switching circuit 9 is connected to the first storage battery 11 via the controller 10 and is connected to the second storage battery 13 that stores the electric power generated by the photovoltaic power generation panel 12. The switching circuit 9 has a power generation circuit when the power regeneration type motor 3 is used as a generator and a motor circuit when the power regeneration type motor 3 is also used as a motor (both are not shown), and power is supplied through these circuits. By switching the direction of the current flowing through the regenerative motor 3 (see the arrow in FIG. 1), the power regenerative motor 3 can be switched to the generator mode to store the generated power in the first storage battery 11 or to regenerate the power. The motor 3 is switched to the motor mode, and the motor is operated by the electric power of the second storage battery 13.

The switching circuit 9 is electrically connected to the generator / motor switching determination unit 16 described later in the control means 4, and is connected to the power generation circuit and the motor circuit based on the determination signal output from the generator / motor switching determination unit 16. It is designed to be selectively switched to.

The electric power regeneration type motor 3 is switched to the generator mode to generate electric power, and the electric power stored in the first storage battery 11 is supplied to an external DC load power source or an external AC load via a DC-AC inverter. Power is supplied to the power system.

The controller 10 has a function of switching the power regeneration type motor 3 to the generator mode, adjusting the amount of output current generated, and controlling the current and voltage output to the first storage battery 11 or an external load power source. For example, the power generation load applied to the generator can be reduced by controlling the output current amount to be small immediately after the rotor 2 is started or when the rotation speed of the rotor 2 is low and the wind speed is low. It is possible to prevent the stall of 2.

The control means 4 includes an average wind speed determination unit 14, a wind turbine peripheral speed determination unit 15, and a generator / motor switching determination unit 16.
The average wind speed determination unit 14 is connected to a wind speed meter 17 which is a wind speed detecting means for detecting the average wind speed of the wind toward the rotor 2 at regular intervals, and the average wind speed detected by the wind speed meter 17 is the average wind speed. When it is input to the determination unit 14 and arithmetically processed by the central processing device (CPU) 18 of the control means 4 to determine that the wind speed has reached a predetermined reference average wind speed, the generator / motor switching determination unit 16 is used. Output the judgment signal. The average wind speed detection time by the anemometer 17 is preferably set at a relatively short interval of, for example, 10 seconds or less so that the amount of power generation does not fluctuate significantly even at low wind speeds.

Although detailed description will be described later, the generator / motor switching determination unit 16 outputs a determination signal to the switching circuit 9 when the wind speed meter 17 detects a predetermined reference average wind speed, for example, 2 m / s. The switching circuit 9 is switched from the power generation circuit to the motor circuit, and the power regeneration type motor 3 is operated in the motor mode.
Further, a determination signal is output to the generator / motor switching determination unit 16 based on the data input from the rotation speed detection sensor 20 described later to the wind turbine peripheral speed determination unit 15.

A gear 19 for measuring the rotation speed of the rotor 2 is attached to an appropriate position in the middle portion of the vertical spindle 5, and the rotation speed of the gear 19 is detected by the rotation speed detection sensor 20 to detect the rotation speed of the rotor 2. The rotation speed of the rotor 2 can be detected via the 5. In addition, instead of the gear 19, for example, one or a plurality of convex portions may be provided on the outer peripheral surface of the vertical spindle 5.
For the rotation speed detection sensor 20, for example, a non-contact type sensor such as a magnetic rotation speed detection sensor, an ultrasonic rotation speed detection sensor, or a rotary encoder is used.

The rotation speed of the vertical spindle 5 detected by the rotation speed detection sensor 20 is input to the wind turbine peripheral speed determination unit 15 of the control means 4, and based on the input rotation speed, the central processing device 18 of the control means 4 rotates the rotor. Calculate the average peripheral speed of 2. That is, since the length (2πr) of the outer circumference of the rotor 2 is determined from the radius of rotation (r) of the blade 8 of the rotor 2, the rotation speed (rpm) of the vertical spindle 5 is determined by the length of the outer circumference (2πr). By multiplying by, the peripheral speed (m / s) can be obtained. The rotation speed detection sensor 20 and the rotor peripheral speed determination unit 15 correspond to the rotation speed detection means according to the present invention.

The peripheral speed of the rotor 2 can also be obtained by detecting the angular velocity of the blade 8 with a sensor. That is, the value obtained by multiplying the angular velocity (rad / s) of the blade 8 by the radius of gyration (r) is the peripheral velocity of the rotor 2.

When the wind turbine peripheral speed determination unit 15 determines that the average peripheral speed of the rotor 2 has reached a specific upper limit value, for example, 5 m / s, the generator / motor switching determination unit 16 outputs the power to the switching circuit 9. The switching circuit 9 is switched from the motor circuit to the power generation circuit based on the determination signal, and the power regeneration type motor 3 is operated in the generator mode.

Next, a wind power generation method using the wind power generation device 1 according to the above embodiment will be described with reference to the flowchart shown in FIG.
First, the average wind speed when the rotor 2 rotates and the generator / motor switching determination unit 16 is operating in the generator mode is measured by the anemometer 17 (S1), and the central processing device 18 of the control means 4 Based on the calculation processing result, the average wind speed determination unit 14 determines whether or not the predetermined average wind speed is, for example, 2 m / s or more (S2).

When the average wind speed determination unit 14 determines that the average wind speed is 2 m / s or more, which is the reference average wind speed, the generator / motor switching determination unit 16 of the control means 4 outputs a determination signal to the switching circuit 9. The switching circuit 9 is switched to the motor circuit according to the determination signal (S3).

As a result, the power regeneration type motor 3 that had been operating in the generator mode until then is switched to the motor mode and automatically started with the power supplied from the second storage battery 13 (S4), and the vertical spindle 5 is forced. The wind turbine, that is, the rotor 2 is accelerated and rotated (S5). If it is determined that the average wind speed has not reached the reference average wind speed of 2 m / s, the process returns to step S1 and the average wind speed is continuously measured.

When the power regeneration type motor 3 is switched from the generator mode to the motor mode, the cogging torque by the generator does not act on the vertical spindle 5, and the rotor 2 continues to rotate due to inertia, so that the motor accelerates the rotor 2 quickly. Can be rotated. Therefore, the operation time in the motor mode is short, and the power consumption of the second storage battery 13 operated in the motor mode can be small.

The reason for determining whether or not the average wind speed is 2 m / s or more is that, in the vertical axis type rotor 2 provided with the lift type blade 8 having the shape described above, for example, the turning radius of the blade 8 is 1 m and the blade length of the blade 8 is 1. This is because, in the case of 2 m, when the average wind speed is 2 m / s or more, the rotation of the rotor 2 is accelerated by the lift generated in the blade, and the generated power from the generator rotates at a speed at which it can be output.

Therefore, when the rotor 2 is rotating at a low wind speed of about 2 m / s, if the power regeneration type motor 3 is switched to the motor mode and the rotation of the rotor 2 is rapidly accelerated, the blade will be lifted. It occurs and is further accelerated, and then the power generation efficiency when switching from the motor mode to the generator mode to generate power is increased.

After accelerating the rotation of the rotor 2 in the motor mode, the rotation speed detection sensor 20 detects the average rotation speed of the vertical spindle 5, and the central processing device 18 converts it into the peripheral speed of the wind turbine, that is, the rotor 2 based on the rotation speed. Then, the result is output to the rotor peripheral speed determination unit 15 (S6), and the rotor peripheral speed determination unit 15 determines a specific upper limit value in which the peripheral speed of the rotor 2 exceeds the reference average wind speed of 2 m / s, for example, 5 m / s. Is determined (S7).

The reason for determining whether or not the peripheral speed of the rotor 2 has reached 5 m / s is that the peripheral speed of the rotor 2 is 5 m / s in the vertical axis type rotor 2 provided with the lift type blade 8 having the above-mentioned shape. When it reaches, the lift (thrust) generated in the blade 8 increases due to the action of the inwardly inclined portions 8B at both the upper and lower ends of the blade 8 and the Coanda effect, and the rotor 2 has a circumference that exceeds the wind speed even without the assistance of the motor. This is because it rotates efficiently while accelerating to speed to generate power, and stall due to the power generation load is less likely to occur.

To exemplify the rotation speed of the rotor 2 when the peripheral speed is 5 m / s, the peripheral speed, the rotation speed, and the length of the outer circumference have the above-mentioned relationships. Therefore, for example, the rotation radius (r) of the blade 8 ) Is 1 m, the outer peripheral length (2πr) of the rotor 2 is 6.28 m. Therefore, if the peripheral speed of 5 m / s is divided by the outer peripheral length of 6.28 m and multiplied by 60 to convert to a minute speed, the rotation speed of the rotor 2 is about 48 rpm.

When the rotor peripheral speed determination unit 15 determines that the peripheral speed of the rotor 2 has reached a specific upper limit value of 5 m / s, the generator / motor switching determination unit 16 of the control means 4 determines the switching circuit 9. A signal is transmitted, and the switching circuit 9 is switched to the power generation circuit according to the determination signal (S8). As a result, the electric power regeneration type motor 3 is switched from the motor mode to the generator mode and started (S9), and the generated electric power is stored in the first storage battery 11.

When the rotor peripheral speed determination unit 15 determines that the peripheral speed of the rotor 2 has not reached a specific upper limit value of 5 m / s, the process returns to step S5, and the power regeneration type motor 3 is switched to the motor mode while the power regeneration type motor 3 is switched to the motor mode. Continue accelerating until the peripheral speed of the rotor 2 reaches a specific upper limit of 5 m / s.

After switching the power regeneration type motor 3 to the generator mode, the average wind speed is measured again by the wind speed meter 17 (S10), and when the average wind speed determination unit 14 detects the reference average wind speed of 2 m / s or less (S11), , Returning to step S3, the switching circuit 9 is switched to the motor circuit, the power regeneration type motor 3 is switched to the motor mode again, and the rotor 2 is accelerated and rotated in the same manner as described above. By repeating steps S3 to S11 in a loop to control the rotation speed of the rotor 2, the power generation efficiency can be significantly improved.

As described above, in the wind power generation method according to the above embodiment, the power regeneration type motor 3 capable of switching between the generator mode and the motor mode is connected to the vertical main shaft 5 of the rotor 2, and the rotor 2 is connected. when rotating at a low wind speed of about average wind speed 2m / s, so that the rotor 2 reaches a certain upper limit value 5 m / s is a peripheral speed for rotation efficiently while accelerating on its own, the power regenerative The motor 3 is switched to the motor mode to accelerate quickly, and when the peripheral speed of the rotor 2 reaches a specific upper limit value of 5 m / s, the power regeneration type motor 3 can be switched to the generator mode to generate electricity. Since the rotation speed of the rotor 2 is repeatedly controlled, the power generation efficiency can be improved without significantly fluctuating the generated power even under a low wind speed where the rotation speed of the rotor 2 is low and the amount of power generation is small. Can be done.

Further, the average peripheral speed of the rotor 2 when the power regeneration type motor 3 is switched from the motor mode to the generator mode is set to 5 m / s, which is a value at which the rotor 2 can rotate efficiently while accelerating by itself, for example. Then, when the average peripheral speed reaches a specific upper limit value of 5 m / s, even if the motor is stopped, stall due to the power generation load is less likely to occur, and it is necessary to frequently switch the power regeneration type motor 3 to the motor mode. Therefore, the power consumption of the second storage battery 13, which is the power source for driving the motor, can be reduced.

Further, since the power regeneration type motor 3 is connected to the vertical spindle 5 and the motor 3 is switched to the motor mode by the switching circuit 9 to accelerate the rotation of the rotor 2, the rotor 2 is accelerated and rotated. There is no need to separately install a dedicated motor for this purpose and control it, which is economical.

The present invention is not limited to the above embodiment, and various modifications and modifications as follows can be made without departing from the gist of the present invention.

In the above embodiment, when it is detected that the average wind speed reaches the reference average wind speed of 2 m / s, the power regeneration type motor 3 is switched to the motor mode and started to accelerate the rotation of the rotor 2, but the average When the average rotation speed of the vertical spindle 5 when the wind speed is 2 m / s is detected, or the peripheral speed of the rotor 2 when the average wind speed is 2 m / s is detected, the power regeneration type motor 3 is put into the motor mode. It may be switched to accelerate the rotor 2.

Further, in the above embodiment, the rotor 2 is accelerated by the motor mode until the peripheral speed of the rotor 2 reaches a specific upper limit value of 5 m / s, and the motor mode is switched to the generator mode. However, as described above, the rotor 2 Since the peripheral speed can be converted into the rotation speed, the motor mode is switched to the generator mode when the rotation speed sensor 20 detects the rotation speed of the rotor 2 when the peripheral speed reaches a specific upper limit value of 5 m / s. It can also be.

In the above embodiment, the power regeneration type motor 3 is switched to the motor mode, and the reference average wind speed for accelerating and rotating the rotor 2 is set to 2 m / s. However, the average wind speed at this time corresponds to the magnitude of the turning radius of the blade 8. And set appropriately.
That is, for example, when the turning radius of the blade 8 is smaller than 1 m in the above embodiment, the rotating torque of the rotor 2 becomes small and the rotor 2 is likely to stall due to the power generation load. Therefore, the reference average wind speed is set to 2 m / s or more. Then, when the rotation speed of the rotor 2 is high, the mode may be switched to the motor mode to accelerate the rotation of the rotor 2.

The rotation radius of the blade 8 is greater than 1m, even low rotational speed of the rotor 2, the rotation torque is rotatable electrical becomes large, and set to the following criteria average wind speed 2m / s When the rotation speed of the rotor 2 is low, the mode may be switched to the motor mode to accelerate the rotation of the rotor 2.

Further, in the above embodiment, when the rotational peripheral speed of the rotor 2 reaches 5 m / s, the power regeneration type motor 3 is switched from the motor mode to the generator mode, but when switching from the motor mode to the generator mode. The rotational peripheral speed of the rotor 2 is appropriately set according to the magnitude of the rotational radius of the blade 8.

In the above embodiment, the second storage battery 13 stored by the photovoltaic power generation panel 12 is used as the power source to be operated in the motor mode, but the photovoltaic power generation panel 12 and the second storage battery 13 are omitted, and the first storage battery is omitted. The motor may be operated by using the electric power of 11. At this time, as described above, since the operating time in the motor mode is short, the power consumption of the first storage battery 11 can be minimized.

As described in FIG. 4 of Japanese Patent No. 4907073, the wind power generation method of the present invention includes a wind power generation device in which a lifting blade 8 is fixed to a vertical spindle 5 in a multi-stage manner, and Japanese Patent No. 4740580, that is, a blade. It can also be applied to a wind power generator equipped with a horizontal axis wind turbine whose tip is inclined in the main axis direction (wind receiving direction).

1 Wind power generator 2 Rotor
3 Power regeneration type motor 4 Control means 5 Vertical spindle 6 Support frame 6A Bearing 7A, 7B Arm 8 Lifting blade 8A Main part 8B Inwardly inclined part 9 Switching circuit 10 Controller 11 1st storage battery 12 Solar power generation panel 13 2nd storage battery 14 Average wind speed determination unit 15 Rotor peripheral speed determination unit 16 Generator / motor switching determination unit 17 Wind speed meter (wind speed detection means)
18 Central processing unit 19 Gear 20 Rotation speed detection sensor C Tsubasa center line G Foundation O Rotational locus

Claims (1)

The rotor is vertically mounted on the rotation shaft of a power regeneration type motor that can be switched between generator mode and motor mode, which is arranged on the base of the support frame of the rotor equipped with a lift-type blade having an inclined portion formed at the tip. An average wind speed determination unit equipped with a wind speed meter, a rotor peripheral speed determination unit equipped with a rotation speed detection sensor, a generator / motor switching determination unit connected to a switching circuit, and central processing in the vicinity of the rotor connected to the main shaft. A state in which a control means including the device is electrically connected to the power regeneration type motor via the switching circuit, the rotation speed detection sensor is kept close to the vertical main shaft, and the rotor is rotating at a low wind speed. In
When the control means such as a wind speed meter detects a predetermined reference average wind speed of 2 m / s, the generator / motor switching determination unit in the control means switches the switching circuit to set the power regeneration type motor to the motor mode. , Accelerate rotation until the peripheral speed or rotation speed of the rotor reaches a specific upper limit value of 5 m / s, switch the power regeneration type motor to the generator mode to generate power with wind power, and control the wind speed meter and the like. When the means again detects a predetermined reference average wind speed of 2 m / s, the power regeneration type motor is switched to the motor mode again by the control means, and the peripheral speed or rotation speed of the rotor is set to a specific upper limit value of 5 m. A wind power generation method characterized in that the power regenerating motor is repeatedly switched to a generator mode to generate power with wind power by accelerating and rotating until it reaches / s.

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