WO2017170663A1

WO2017170663A1 - Savonius wind power generation device and control method therefor

Info

Publication number: WO2017170663A1
Application number: PCT/JP2017/012851
Authority: WO
Inventors: 秀一石原田; 禎史濱田; 慶一郎谷口
Original assignee: 国立大学法人鹿児島大学; 茂建設株式会社; 株式会社Ｓ－ｓｔｙｌｅ
Priority date: 2016-03-30
Filing date: 2017-03-29
Publication date: 2017-10-05
Also published as: JPWO2017170663A1

Abstract

[Problem] To provide a wind power generation device that is provided with multi-stage Savonius windmills in the front-and-rear direction, and that enables the windmills to rotate efficiently against wind from any direction and improves power generation efficiency. [Solution] Three wind power generation units 200A-200C each having two Savonius windmills 210 disposed side by side are arranged so as to form a substantially equilateral triangle. A narrow space S is provided between the windmills at the front stage with respect to a wind direction W1, wind power passing from the front to the rear is received by inner wind-receiving buckets 213 so that the windmill on one side rotates clockwise and the windmill on the other side rotates counterclockwise. At the middle stage, wind power passing from the front is received by outer wind-receiving buckets so that the windmill on one side rotates counterclockwise and the windmill on the other side rotates clockwise. At the rear stage, the wind power having passed through the space S at the front stage is received by inner wind-receiving buckets so that the windmill on one side rotates clockwise and the windmill on the other side rotates counterclockwise. Further, in a view from the front, each of the inner wind-receiving buckets at the middle stage partially overlaps the outer wind-receiving bucket on the same side at the front stage, and each of the outer wind-receiving buckets at the rear stage partially overlaps the inner wind-receiving bucket on the same side at the front stage.

Description

Savonius wind power generator and control method thereof

The present invention relates to a Savonius type wind power generator equipped with a Savonius type windmill which is one of vertical axis type windmills, and a control method thereof.

Wind turbines used in wind turbine generators include horizontal axis types such as multi-blade type, sail wing type, Dutch type, and propeller type, and vertical axis types such as crossflow type, Savonius type, Darius type, and gyromill type. . The horizontal axis type generally has the advantage of good power generation efficiency and is easy to increase in size, while the vertical axis type is easy to install and maintain, can receive wind in all directions of 360 degrees, and can install many units in a narrow installation space. There are advantages. In particular, the Savonius type has the advantage that it can rotate even in light winds and obtain a large torque.

Conventionally, as an example using a Savonius type windmill, it has a windmill (Patent Documents 1 and 2) whose rotational efficiency is improved by changing the shape of the Savonius type wing, and has Darrieus type and Savonius type wings, and it is low speed in a light wind There is known a wind power generator (Patent Document 3) that uses rotation by a Savonius type wing excellent in rotation characteristics and uses rotation by a Darius type wing excellent in high speed rotation characteristics when the wind speed exceeds a predetermined value. ing.

JP 2003-293928 A JP 2007-113512 A JP 2007-113562 A

However, in the Savonius type windmill, as shown in FIG. 10, the pair of wind receiving buckets 2 with respect to the rotating shaft 1 simultaneously receives a positive wind that generates rotation and a negative wind that tries to stop the rotation. If the efficiency is poor and the rotation efficiency is increased, the blade shape becomes complicated as in

Patent Documents

1 and 2 above. Furthermore, since the power generator of Patent Document 3 is combined with a Darius type wing having a long rotating shaft, the size of the apparatus increases, and since the Darius type wing rotates at a high speed, the apparatus must be securely and firmly installed on the ground.

In recent years, construction of large-scale wind power generation has been sluggish from the viewpoint of environmental assessment and landscape maintenance, and expectations are growing for small-scale wind power generation devices that can be installed in station squares and parks.

The present invention has been made in view of the above circumstances, and is provided with a plurality of savonium-type wind turbines at the front and rear, and can efficiently rotate each wind turbine with respect to wind from an arbitrary direction to increase power generation efficiency. An object of the present invention is to provide a wind turbine generator and a control method thereof.

Savonius type wind power generator according to the present invention,
A Savonius-type power generation device that generates power by a generator by rotating a Savonius-type windmill, wherein the Savonius-type windmill is curved in an arc shape with a vertical rotation shaft, upper and lower end plates that hold the vertical rotation shaft Two wind receiving buckets having an inner surface facing the same rotation direction across the vertical rotation shaft and held between the upper and lower end plates,
Two Savonius type wind turbines are arranged on the left and right in the front and rear stages,
The front stage has a narrow gap between the left and right windmills, each wind receiving bucket receives the wind force passing from the front to the back, one rotates clockwise and the other rotates counterclockwise,
The rear stage receives the wind force after passing through the gap in the previous stage by each wind receiving bucket, and one rotates clockwise and the other counterclockwise,
Furthermore, the first stage is characterized in that the rear stage is arranged so that the outer wind receiving bucket of the rear stage partially overlaps the inner wind receiving bucket on the same side of the front stage as viewed from the front with respect to the front stage.

Savonius type wind power generator according to the present invention,
Two Savonius type wind turbines are arranged on the left and right in the middle between the front and rear stages,
In the middle stage, each outer wind-receiving bucket receives wind power passing from the front to the back, one rotates counterclockwise and the other rotates clockwise,
Further, according to the second feature, the middle stage is arranged so that each inward wind receiving bucket of the middle stage partially overlaps with the outer wind receiving bucket on the same side of the previous stage as viewed from the front with respect to the front stage. To do.

Savonius type wind power generator according to the present invention,
Three sets of wind power generation units with two savonium-type windmills arranged in parallel are arranged in a generally triangular shape in plan view, and the two windmills in front of the wind direction are the front stage, and the two The third feature is that the windmill is the latter stage and the two middle windmills are the middle stage.

Savonius type wind power generator according to the present invention,
A fourth feature is that the three sets of wind power generation units are arranged so as to form a substantially equilateral triangle as a whole when viewed in plan so that an internal angle between adjacent wind power generation units is approximately 60 degrees. Here, approximately 60 degrees means, for example, 55 degrees or more and less than 65 degrees.

Savonius type wind power generator according to the present invention,
A wind power generation unit including a support unit, wind turbines at the front stage and the rear stage or wind turbines at the front stage, the middle stage, and the rear stage; and the wind power generation unit is interposed between the support unit and the wind power generation unit in the mainstream direction of the wind In addition, a fifth feature is that a rotating portion is provided that is rotated so as to obtain an optimal wind direction arrangement.

The control method of the Savonius type wind power generator according to the present invention,
A support unit, a wind power generation unit in which two left and right savonium-type wind turbines are arranged in the front stage, the rear stage, or the front stage, the middle stage, and the rear stage, and a rotating unit interposed between the support unit and the wind power generation unit, In the savonium-type wind power generator equipped with a control unit,
When the main wind direction is different from the optimum wind direction arrangement of the wind power generation unit, the control unit is one of information on wind direction information from an anemometer, wind distribution information from a wind map, and power generation information for each windmill. Alternatively, the direction of the main flow direction of the wind is calculated based on a combination of a plurality of information, and a rotation instruction is given to the rotation unit based on the calculated value so that the main flow direction of the wind matches the optimum wind direction arrangement of the wind power generation unit. The method for controlling a Savonius type wind power generator is characterized by rotating the wind power generator.

As described above, according to the Savonius-type wind power generator of the present invention, it is possible to efficiently receive the wind force amplified by the wind turbine in the front with respect to the wind from an arbitrary direction, thereby generating power efficiency. And an excellent effect that an optimal small wind power generator can be realized.

The front view which shows the example of whole structure of the Savonius type | mold wind power generator which concerns on this invention, The top view which shows the wind power generation part of the wind power generator of FIG. The top view which shows the effect | action of the wind force with respect to the wind power generation part of FIG. A model diagram showing how the wind passing between two Savonius type windmills increases in speed, A diagram showing the relationship between wind speed and power in a savonium type windmill A plan view showing a type in which a large number of windmills are arranged in a horizontal row as a comparative example, The figure which shows the structural example of a control part, The top view which shows the wind direction from three directions with respect to the wind power generation part of FIG. A diagram showing a wind chart model, It is a figure which shows the effect | action of the wind force with respect to a Savonius type | mold windmill.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

As shown in FIG. 1, a Savonius type wind power generator S (hereinafter referred to as a wind power generator S) is installed on a flat land G such as a park or a station square as an example. The land G may be a plateau, a slope, or a mountain where wind passes. The wind power generator S includes a support unit 100, a wind power generation unit 200, a control unit 300, and a power conditioner 400.

The support unit 100 includes a fixed column 110 fixed vertically on the land G, and a rotation support unit 130 supported rotatably at the upper end of the fixed column 110 via the rotation unit 120. The rotation unit 120 includes a drive motor (not shown), and rotates the drive motor forward and backward by control from the control unit 300 to rotate the wind power generation unit 200 supported by the rotation support unit 130 according to the wind direction. Yes.

The wind power generation unit 200 includes a base 201 and three sets of power generation units 200A to 200C arranged on the base 201. The power generation units 200A to 200C include a plurality (2 to n, two in the illustrated example) of savonium-type windmills 210 connected in a row in the horizontal direction, and a plurality of generators 220 connected to each windmill 210. ing.

The savonium type windmill 210 is a vertical axis type windmill, that is, an omnidirectional type windmill that does not depend on the wind direction, and includes a vertical rotating shaft 211, upper and lower end plates 212 that hold the vertical rotating shaft 211, and a curved inner surface that curves in an arc shape. 213a includes two wind receiving buckets 213 that face the same rotation direction with the vertical rotation shaft 211 therebetween and are held between the upper and lower end plates 212. The wind receiving bucket 213 receives wind energy from all directions, and rotates the vertical rotation shaft 211. The savonium type windmill 210 of the present embodiment starts rotating with low speed (1.0 to 1.5 m / S) wind power.

The generator 220 generates power by the rotation of the vertical rotation shaft 211 of the savonium type windmill 210 (hereinafter referred to as the windmill 210). As the generator 220, an AC generator (induction generator, synchronous generator) is usually used. The electric power generated by the generator 220 is transmitted to the power conditioner 400 via the transmission line 160. In addition, when the wind is strong, the output of the generated power is suppressed by the control from the control unit 300.

The control unit 300 controls the entire wind power generator S, collects wind direction information from the anemometer 140 through the line 150, and also distributes wind direction information (wind speed, appearance frequency) based on the annual wind map of the installation area from the outside. , Direction), and further, power generation information (power generation amount, rotation speed) for each wind turbine is collected from the generated power acquisition unit 221 of the wind power generation unit 200 through the line 150. Then, based on any one of the collected wind direction information, wind distribution information, and power generation information for each wind turbine, or a combination of a plurality of information, the direction of the main wind direction of the wind is calculated, and a rotation instruction is given to the rotating unit 120. The wind power generator 200 is rotated in a direction (optimal wind direction arrangement) that provides maximum power generation efficiency.

The power conditioner 400 converts the power generated by the wind power generation unit 200 from direct current to alternating current. The electric power converted into alternating current is transmitted to the electric power company and others through the transmission line 160.

FIG. 2 shows a layout of three power generation units 200A to 200C in the wind power generation unit 200. As shown in FIG. 2, the three sets of power generation units 200A to 200C are arranged on the upper surface of the base 201 so that the inner space formed by each unit in a plan view is a substantially equilateral triangle. Specifically, each unit is arranged so that an angle formed by an extension line of a line connecting the vertical rotation shafts 211 of the two wind turbines 210 in each unit is approximately 60 degrees.

Each wind turbine 210 of each of the power generation units 200A to 200C is restricted in the positional relationship between the rotation direction and the regular triangle arrangement so as to maximize the effects of the present invention.

First, the rotation direction of the wind turbine at each stage will be described. In the layout of FIG. 2, the wind turbine 210 _1L of the left power generation unit 200A among the wind turbines at the front stage is clockwise with respect to the wind direction W1 (from the top to the bottom of the figure). The direction of the curved inner surface 213a of each wind receiving bucket 213 is set so that the windmill 210 _1R of the right power generation unit 200B is counterclockwise.

Similarly, among the wind turbines in the middle stage with respect to the wind direction W1, each wind-receiving bucket is set such that the wind turbine 210 _2L of the left power generation unit 200A is counterclockwise and the wind turbine 210 _2R of the right power generation unit 200B is clockwise. The direction of the curved inner surface 213a of 213 is set. Further, among the wind turbines at the subsequent stage with respect to the wind direction W1, the wind turbine 210 _3L of the power generation unit 200C facing the wind turbine W3 is clockwise and the wind turbine 210 _3R is counterclockwise so that the right wind turbine 210 _3R is counterclockwise. The direction of the curved inner surface 213a is set.

Next, the mutual positional relationship will be described. In the layout of FIG. 2, the front windmill, that is, the front inward of the power generation unit 200A inclined to the left side with respect to the wind direction W1 (main flow direction: from the top to the bottom). The gap S between the wind turbine 210 _1L and the wind turbine 210 _1R inward of the power generation unit 200B inclined to the right is set to be narrow (a width narrower than the diameter of the wind turbine on the left).

Further, the middle stage wind turbine, that is, the wind turbine 210 _2L outside the rear of the power generation unit 200A inclined on the left side and the wind turbine 210 _2R outside the rear of the power generation unit 200B inclined on the right side are arranged on the same unit side in the previous stage. More specifically, when the wind turbine 210 _{2L in the} middle stage and the wind-receiving buckets 213 of the wind turbine 210 _2R are positioned inward so as to partially overlap the wind turbine in the wind direction W1, the wind turbine 210 _1L in the front stage The wind receiving buckets 213 located on the outer sides of the windmill 210 _1R are arranged so as to overlap with each other by 1/2 or more (in the example shown, about 2/3) when viewed in the wind direction W1.

Similarly, the rear wind turbine, that is, the left wind turbine 210 _3L and the right wind turbine 210 _3R of the power generation unit 200C facing the wind direction W1, are viewed in the wind direction W1 with respect to the same wind turbine in the front and the same wind turbine in the middle. More specifically, when the wind-receiving buckets 213 of the rear wind turbine 210 _3L and the wind turbine 210 _3R are located outward, the positions of the wind turbine 210 _1L and the wind turbine 210 _1R are located inward of the wind turbine 210 _1L. The wind receiving bucket 213 overlaps with the wind receiving bucket 213 in the wind direction W1 by more than 1/2 (in the illustrated example, about 100%), and is located inward of each of the middle wind turbine 210 _2L and the wind turbine 210 _2R. They are arranged so as to partially overlap (about ¼ in the illustrated example) when viewed in the wind direction W1.

As a result, the wind power generation unit 200 first controls the

wind turbines

210 _1L and 210 _{1R in the} preceding stage with reference to FIGS. 2 and 3 according to the regulation of the rotation direction of each wind turbine and the layout of the power generation units 200A to 200C. Is received by the inward wind receiving bucket 213, and the left windmill 210 _1L rotates clockwise, the right windmill 210 _1R rotates counterclockwise, respectively. Generate electricity.

Next, for the

wind turbines

210 _2L and 210 _2R in the middle stage, the wind turbine W ₂ in the outside receives wind of the wind direction W1 (for example, wind speed 4 m / second), and the left wind turbine 210 _2L rotates counterclockwise, The right windmill 210 _2R rotates clockwise to generate electricity. At this time, the

wind turbines

210 _2L and 210 _2R in the middle stage are in a positional relationship in which the inner wind receiving bucket 213 overlaps with the outer wind receiving buckets 213 of the

front wind turbines

210 _1L and 210 _1R when viewed in the wind direction W1. The negative wind that stops the rotation is blocked (see ellipse A in FIG. 3 and FIG. 10). As a result, in the middle

stage wind turbines

210 _2L and 210 _2R , the rotation speed increases and the generated power increases.

Next, with respect to the

rear wind turbines

210 _3L and 210 _3R , the wind passing through the gap S between the

front wind turbines

210 _1L and 210 _1R is received by the inner wind receiving bucket 213, and the left wind turbine 210 _3L is operated as a clock. Around, the right windmill 210 _3R rotates counterclockwise to generate electricity. At this time, the wind toward the

rear wind turbines

210 _3L and 210 _3R is increased in speed (wind speed of 8 m / sec) by the venturi effect when passing through the narrow gap S between the

front wind turbines

210 _1L and 210 _1R. Increases, the rotational speed of the

wind turbines

210 _3L and 210 _{3R in} the _subsequent stage is increased, and the generated power greatly increases.

FIG. 4 shows a wind flow model when wind of 4 m / s is input to two Savonius type wind turbines. When a wind having a constant width (S1) having a wind speed of 4 m / s passes through the gap (S2) between the two wind turbines, the wind speed increases to about 8 m / s due to the venturi effect. The wind power generator S of the present invention uses the venturi effect to increase the rotational speed of the wind turbine at the subsequent stage.

FIG. 5 shows the relationship between wind speed (m / s) and electric power (W) in a savonium type windmill. As shown in the figure, the power when the wind speed is 4 m / s is about 100 W, but when it reaches 5 m / s, it reaches about 250 W, when it reaches 8 m / s, it reaches about 750 W, and when it reaches 10 m / s, it reaches about 1450 W.

In the wind turbine generator S according to the present invention, referring to FIG. 3 and FIG. 5, the wind turbine at the front stage receives positive and negative winds of 4 m / s to generate about 100 W respectively, and the wind turbine at the middle stage is positive at 4 m / s. In response to the wind (and blocking the negative wind), the speed is substantially increased to 5 m / s, generating about 250 W each, and the subsequent wind turbine is a positive wind (speed increased to 8 m / s by the Venturi effect) And negative winds) to substantially increase the speed to 10 m / s, generating about 1450 W each. The system as a whole can generate a total of 3600W. Also, the operating rate is 20% (3.6 kW / 18 kW = 0.2).

FIG. 6 shows a layout in which the same number (six) of wind turbines are arranged in parallel with respect to the wind direction W1 as a comparative example, but 100 × 6 = 600 W of power generation and operation rate of 3% (0.6 kW) with respect to 4 m / s of wind power. / 18 kW = 0.03). Compared with the example of FIG. 6 in which the same number of wind turbines are arranged in parallel, the wind power generator S according to the present invention can generate power generation efficiency of about seven times at the maximum.

The main wind direction of the wind may not be the optimal wind direction arrangement (the arrangement shown in FIG. 2) of the wind power generation unit 200. In this case, the optimal wind direction arrangement of the wind power generation unit 200 is made to coincide with the main wind direction in the range of maximum ± 60 degrees by the operation of the control unit 300 and the rotation unit 120. That is, the control unit 300 collects the wind direction information from the anemometer 140, collects the wind distribution information based on the wind map of the installation area, and collects the wind direction information from the generated power acquisition unit 221 of the wind power generation unit 200 for each windmill. Collect power generation information (power generation amount, number of revolutions) and determine the direction of the mainstream direction of the wind based on any one of the collected wind direction information, wind distribution information, power generation information for each windmill, or a combination of multiple information. Calculation is performed (every hour / every hour / day / night / day / month / season), a rotation instruction is given to the rotation unit 120, and the rotation support unit 130 is rotated (maximum ± 60 degrees). Thereby, the mainstream direction of a wind and the optimal wind direction arrangement | positioning of the wind power generation part 200 can be matched, and electric power generation efficiency can be maximized.

FIG. 7 shows a configuration example of the control unit 300. As shown in the figure, the control unit 300 includes a wind direction information collection unit 310, a wind distribution information collection unit 320, a power generation information collection unit 330, and a wind direction calculation unit 340 in order to realize the rotation control with respect to the rotation unit 120 described above. A rotation instruction unit 350 is provided. The control unit 300 may rotate the rotation support unit 130 at a maximum of 60 degrees, and stop at a position where the total power generation amount becomes maximum on the way.

When the main wind directions are three directions that form approximately 120 degrees with each other, the three wind power generation units 200A to 200C are arranged so as to form an equilateral triangle, so that the wind power generation unit 200 is not rotated. It is possible to match the optimum wind direction position. That is, among the three different wind directions shown in FIG. 8 (W1 to W3: interval 120 degrees), the wind turbine 210 _2R of the power generation unit 200B and the power generation unit for the wind of the wind direction W2 (lower right to upper left). The windmill 210 _{3R of the} 200C is the front stage, the windmill 210 _1R of the power generation unit 200B and the windmill 210 _3L of the power generation unit 200C are the middle stage, and the windmill 210 _1L and the windmill 210 _{2L of the} power generation unit 200A correspond to the rear stage. The direction of the rotation direction of each wind turbine with respect to the wind of the wind direction W2 is the same as that with respect to the wind of the wind direction W1.

Similarly, the wind turbine 210 _3L of the power generation unit 200C and the wind turbine 210 _2L of the power generation unit 200A are in front of the wind of the wind direction W3 (lower left to upper right), and the wind turbine 210 _3R of the power generation unit 200C and the power generation unit 200A The windmill 210 _{1L corresponds} to the middle stage, and the windmill 210 _2R and the windmill 210 _{1R of the} power generation unit 200B correspond to the latter stage. The direction of the rotation direction of each wind turbine with respect to the wind of the wind direction W3 is the same as that with respect to the wind of the wind direction W1. Therefore, the generated power similar to the wind of the wind direction W1 is obtained for both the wind direction W2 and the wind direction W3.

Fig. 9 shows the wind map of a certain region in Japan. The wind power generation unit is designed to maximize power generation efficiency based on annual wind data (wind speed, frequency of occurrence, direction) obtained from the wind map. The orientation of 200 may be optimally arranged. In the example of Fig. 9, the direction of high wind frequency of 7m / s throughout the year is north-northwest, east, south-southwest. The wind power generator 200 may be optimally arranged (the wind power generator 200 is oriented so that the wind direction W1 in FIG. 2 is north-northwest). Thereby, power generation efficiency can be increased as much as possible.

As described above, according to the wind turbine generator S according to the present invention, the rotation rate can be increased by increasing the rotation speed of the middle wind turbine as compared with the previous wind turbine, and the subsequent wind turbine can increase the rotation speed. Further, it is possible to increase the rotation rate by increasing the speed, thereby increasing the power generation amount of the entire system and improving the power generation efficiency. In particular, the power generation efficiency is about seven times that of a layout (FIG. 6) in which the same number of wind turbines are arranged in parallel.

In the wind power generator S, three sets of wind power generation units 200A to 200C that are horizontally deployed may be stacked in the vertical direction in a plurality or in multiple stages. Alternatively, only the wind turbines 212 in each of the wind power generation units 200A to 200C may be stacked in the vertical direction in a plurality or in multiple stages.

The wind turbine generator S has been described as an example of a savonium type windmill, but can also be applied to other vertical axis type windmills. A plurality of vertical axis type windmills are arranged in a plurality of stages at the front and rear, and the latter windmill is a venturi. By speeding up due to the effect, a small-sized wind power generator with high power generation efficiency can be realized. Furthermore, the present invention can be applied to a combination of a savonium type windmill and another vertical axis type windmill.

Thus, according to the wind turbine generator according to the present invention, a plurality of savonium-type wind turbines are optimally arranged in a plurality of stages at the front and rear, and the rotation direction of each wind turbine is optimized, so that a small wind turbine generator with high power generation efficiency can be obtained. Could be realized.

The wind power generator according to the present invention can be widely used by being installed on land such as flat ground, upland, slopes, and mountains where wind passes.

DESCRIPTION OF SYMBOLS 100 Support part 110 Fixed support | pillar 120 Rotation part 130 Rotation support part 140 Anemometer 150 Line 160 Transmission line 200 Wind

power generation part

200A, 200B, 200C Power generation unit 201 Base 210 Savonium type windmill (windmill)
211 vertical rotation shaft 212 end plate 213 wind receiving bucket 213a curved inner surface 220 generator 221 generated power acquisition unit 300 control unit 310 wind direction information collection unit 320 wind distribution information collection unit 330 power generation information collection unit 340 wind direction calculation unit 350 rotation instruction unit 400 Power conditioner G Land S Wind power generator

Claims

A Savonius-type power generator that generates power by rotating a Savonius-type windmill, wherein the Savonius-type windmill has a vertical axis, upper and lower end plates that hold the vertical axis, and an arc-shaped curved inner surface that Two wind-receiving buckets sandwiched in the same rotational direction and held between the upper and lower end plates;
Two Savonius type wind turbines are arranged on the left and right in the front and rear stages,
The front stage has a narrow gap between the left and right windmills, each wind receiving bucket receives the wind force passing from the front to the back, one rotates clockwise and the other rotates counterclockwise,
The rear stage receives the wind force after passing through the gap in the previous stage by each wind receiving bucket, and one rotates clockwise and the other counterclockwise,
Further, the rear stage is arranged so that the outer wind-receiving bucket of the rear stage partially overlaps with the inner wind-receiving bucket on the same side of the front stage as viewed from the front with respect to the front stage. Power generation device.
Two Savonius type wind turbines are arranged on the left and right in the middle between the front and rear stages,
In the middle stage, each outer wind-receiving bucket receives wind power passing from the front to the back, one rotates counterclockwise and the other rotates clockwise,
Furthermore, the middle stage is arranged so that each inward wind receiving bucket of the middle stage partially overlaps with the outer wind receiving bucket on the same side of the previous stage as viewed from the front with respect to the front stage. The Savonius type wind power generator according to 1.
Three sets of wind power generation units with two savonium-type windmills arranged in parallel are arranged in a generally triangular shape in plan view, and the two windmills in front of the wind direction are the front stage, and the two 3. A Savonius type wind power generator according to claim 2, wherein the wind turbine is a rear stage and two wind turbines in the middle are middle stages.
The three sets of wind power generation units are arranged so as to form a substantially equilateral triangle as a whole when viewed in plan so that an internal angle between adjacent wind power generation units is approximately 60 degrees. The Savonius type wind power generator described.
A wind power generation unit including a support unit, wind turbines at the front stage and the rear stage or wind turbines at the front stage, the middle stage, and the rear stage; and the wind power generation unit is interposed between the support unit and the wind power generation unit in the mainstream direction of the wind The Savonius type wind power generator according to any one of claims 1 to 4, further comprising: a rotating unit that rotates so as to obtain an optimal wind direction arrangement.
A support unit, a wind power generation unit in which two left and right savonium-type wind turbines are arranged in the front stage, the rear stage, or the front stage, the middle stage, and the rear stage, and a rotating unit interposed between the support unit and the wind power generation unit, In the savonium-type wind power generator equipped with a control unit,
When the main wind direction is different from the optimum wind direction arrangement of the wind power generation unit, the control unit is one of information on wind direction information from an anemometer, wind distribution information from a wind map, and power generation information for each windmill. Alternatively, the direction of the main flow direction of the wind is calculated based on a combination of a plurality of information, and a rotation instruction is given to the rotation unit based on the calculated value so that the main flow direction of the wind matches the optimum wind direction arrangement of the wind power generation unit. The method for controlling a Savonius type wind power generator is characterized by rotating the wind power generator.