KR100969595B1 - A Structure for Compensating Wind Velocity - Google Patents

Abstract

The present invention relates to a wind speed compensation structure, and an object of the present invention is to uniformly correct the vertical wind speed profile (vertical wind speed profile) of the wind blowing into the wind generator to maximize the lifespan and efficiency of the wind power generator, In providing.

The wind speed correction structure of the present invention is a wind speed correction structure 200 having a predetermined height formed by an artificial or natural object including a fence, a building, or a windbreak forest, and the wind speed of the wind flowing into the wind generator 100 is uniform. It is characterized in that it is provided on the ground surface of the position spaced apart from the generator 100 by a predetermined distance.

Wind power generation, wind speed compensation, wind speed compensation structure, fence, building, windbreak

Description

{A Structure for Compensating Wind Velocity}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind speed compensating structure. More specifically, the wind blown by a wind generator generally causes the vertical wind speed profile to be uneven due to the influence of wind shear occurring near the surface. Thereby, to solve the problem that the efficiency and durability of the wind generator is reduced, and relates to a wind speed compensation structure.

In general, the wind generated by the air pressure difference has a vertical structure called a boundary layer, where the wind speed is zero at the ground surface and the wind speed increases as it rises upward. Among the tropospheres where the vertical height at the surface is within about 11 km, the atmospheric layer, in particular from 1 to 2 km, is called the atmospheric boundary layer. In the atmospheric boundary layer, The change is very large.

Figure 1 (A) is a vertical cross-sectional view of the temperature in the vicinity of the atmosphere and the soil on a sunny day, Figure 1 (B) shows the vertical structure of the wind near the surface. In particular, as shown in Figure 1 (B), the wind is affected by the friction of the earth surface, the wind speed is very small near the earth surface and the tendency increases as the altitude increases. At this time, there is a difference in increasing tendency depending on the terrain. In flat terrain, the wind speed is less at the surface due to less influence of friction, while in the rough terrain such as forests and urban areas, the influence of friction increases, so it is relatively high altitude. Even the wind speed is weakened (Fig. 1 (Ba)).

In addition, even in the same region where the surface roughness is the same, the distribution of the wind speed according to the altitude varies as shown in FIGS. 1B and 1BD according to the atmospheric stability state. Figure 1 (Be) is a graph showing the log taken in altitude, it can be seen that there is a linear relationship between the wind speed and the log taken altitude when the atmospheric stability is neutral. The altitude corresponding to the point where the wind speed becomes zero when the straight line is extended (that is, z ₀ in FIG. 1 (Be)) is called the roughness length of the ground surface.

Using the above-described properties, the above-mentioned exponential law of wind speed is widely used in the study of the flow in the atmospheric boundary layer. Where U is the wind speed of the free flow, h is the altitude, and 1 and 2 are the subscripts for the two points with different heights. In addition, p is a wind speed index, which depends on the surface roughness length and atmospheric stability, and has obtained experimentally wind speed index values for various conditions.

2 shows a typical wind generator. As shown in FIG. 2 (A), the wind generator 100 includes a pillar 110, a hub 120 provided on the pillar 110, and a rotatable front end of the hub 120. A spinner 130 and at least one blade 140 connected to the spinner 130 to convert wind power into rotational force of the spinner 130, and provided in the hub 120 and the spinner 130. Is connected to and comprises a conversion system (not shown) for converting the rotational force of the spinner 130 to power.

The trend towards larger wind generators to obtain greater amounts of power at higher efficiency is a global trend. Wind turbines in the commercialization stage are designed to obtain 2MW of electricity per unit, and research and development of wind generators capable of obtaining more than 5MW of electricity are being actively conducted in Europe.

As the size of wind turbines increases, it is well known that the length of one blade 140 generally reaches several tens of meters. However, as described in the description of FIG. 1, the slope of the wind speed distribution varies greatly with the height. 2B is a side view of the wind generator 100. In FIG. 2B, H represents a height from the ground surface of the hub 120, and R represents a length of the blade 140. As shown in the drawing, the magnitudes of the wind speeds respectively accepted by the lower blade 140a located near the surface and the upper blade 140b located far from the surface show a great difference.

If the wind speed distribution slope of the wind blowing through the blades 140 is thus uneven, the following problems occur. First, the wind generator 100 is designed on the premise that uniform wind is blown in. When the wind of different winds is blown into each of the lower blade 140a and the upper blade 140b, the spinner Torque is applied to the 130, and as a result, a repeated fatigue load is applied to the rotating shaft of the spinner 130, thereby rapidly increasing the possibility of breakage. That is, there is a problem in that the lifespan of the wind generator 100 is greatly reduced because of the unevenness of the up and down wind speed. Second, as described above, the wind generator 100 is designed on the premise that uniform wind blows in, and, of course, the estimated power generation is also calculated on this premise. However, when the wind is different from the upper and lower wind speed is blown, when the spinner 130 is torqued and the rotation of the spinner 130 is not made normally, the amount of power generation does not come out as the theoretical expected value, eventually the wind generator (100) ), There is a problem that a sufficient electric output cannot be obtained.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to reduce the wind shear of the wind blowing into the wind generator (shear) by uniformly correcting the vertical wind speed distribution wind power It is to provide a wind speed compensation structure that maximizes the life and efficiency of the generator.

Wind speed correction structure of the present invention for achieving the object as described above, the wind speed correction structure 200 having a predetermined height formed of an artificial or natural object including a fence, a building or a windbreak forest, flows into the wind generator 100 It is characterized in that it is provided on the ground surface of the position spaced apart from the wind generator 100 so that the wind speed of the wind is uniform.

At this time, the wind speed compensation structure 200 is characterized in that provided in a position parallel to the wind generator 100 in a direction parallel to a predetermined distance.

At this time, the wind speed compensation structure 200 is formed in the form of a fence, having a height of 20% to 40% of the height (HR) of the lower blade 140a of the wind generator 100, the wind generator 100 in front It is characterized in that provided in a position spaced two to eight times the height of the wind speed correction structure 200 in the direction. In this case, the wind speed compensation structure 200 is preferably formed in part or the whole of the body is inclined at a predetermined angle toward the wind turbine 100 perpendicular to the ground surface.

Alternatively, the wind speed compensation structure 200 is formed in a building shape, and has a height of 20% to 40% of the height HR of the lower blade 140a of the wind generator 100, and the wind generator 100 is in a forward direction. The wind speed compensation structure 200 is characterized in that it is provided at a position spaced two to six times the height.

Alternatively, the wind speed compensation structure 200 is formed in a windbreak shape having a porosity of 50% or less, and has a height of 20% to 40% of the height HR of the lower blade 140a of the wind generator 100, and the wind generator (100) It is characterized in that provided in a position spaced two to 10 times the height of the wind speed correction structure 200 in the front direction.

In addition, the wind speed compensation structure 200 has a radius of a predetermined distance around the wind generator 100, characterized in that made of a curve comprising a circle or ellipse formed in a shape surrounding the wind generator 100. do. At this time, the wind speed compensation structure 200 is preferably provided only in a predetermined angle region is made of a curve containing a portion of an arc or an ellipse. In this case, the wind speed compensation structure 200 is preferably provided on the ± 15 ° to ± 90 ° angle region around the wind generator 100 front direction.

According to the present invention, there is an effect that the rotation of the wind generator is made stable by mitigating the wind speed shear of the wind blowing into the wind generator to uniformly correct the vertical wind speed distribution, and also uneven according to the height in the past There is an effect of eliminating the problem that the fatigue load is applied on the rotation axis of the wind generator by the wind speed.

Of course, this has the effect of greatly increasing the lifespan of the wind generator, and also has a great effect to significantly reduce the installation and repair costs. In addition, by inputting the wind close to the ideal theoretical value for the wind generator can obtain the theoretical expected power generation enough to maximize the efficiency of the wind generator.

That is, according to the present invention, by making the actual environmental conditions similar to the ideal environmental conditions by the theoretical design, it is possible to achieve the expected life and efficiency when designing the wind generator as it is. This effect involves the following effects. In the case of the conventional wind power generator, the life expectancy and efficiency cannot be obtained under ideal environmental conditions. However, the additional cost is generated, such as by increasing the number of wind power generators in order to produce as much output as desired. The use of a calibrated structure can almost achieve the expected life and efficiency, resulting in very little additional cost, which also saves significant installation budgets. In addition, wind power generator development is often a national project, and according to the effects described above, a more systematic budget execution can be obtained.

In particular, according to the present invention, it is not necessary to separately manufacture the wind speed compensation structure, and in most cases, the monitoring and management building installed together with the wind power generator may be used as the wind speed compensation structure, thereby reducing additional installation costs. The economic effect is very large.

Hereinafter, with reference to the accompanying drawings a structure for adjusting the wind speed according to the present invention having the configuration as described above in detail.

Figure 3 briefly shows the installation state diagram of the structure for the wind speed correction of the present invention. As shown, the wind speed compensation structure 200 of the present invention is provided at a position spaced a predetermined distance (x) toward the front of the wind generator (100).

As described above, in general, the wind blowing in the atmosphere has a vertical wind speed distribution in the form of a velocity of zero on the ground surface and increasing gradually with height, then converging at a constant speed. When the wind traveling with the slope as shown in FIG. 3 (A) encounters the wind speed compensating structure 200 located in front of the wind generator 100, the wind may be reconstructed by the wind speed compensating structure 200. Since the traveling direction is blocked, as shown in FIG. 3B, the wind is pushed upward in the region S near the wind speed compensation structure 200.

As described above, the vertical wind speed distribution near the surface generally increases gradually as the height increases and then converges at a constant speed, so that the lower wind speed is usually much smaller than the upper wind speed. By the way, when the wind speed correction structure 200 of the present invention is provided, an additional portion is generated in the lower wind speed by the wind is pushed up in the area (S) near the wind speed correction structure 200, the wind speed correction structure 200 If the size, material, and shape are properly designed, as shown in FIG. 3C, the wind in the region flowing into the blade of the wind generator 100 may have a constant wind speed.

As such, the wind in the region flowing into the blades of the wind generator 100 has a constant wind speed, thereby reducing the lifespan and efficiency reduction caused by the nonuniformity of the vertical wind speed distribution of the wind flowing into the conventional wind generator. Will be removed.

4A to 4L are graphs of results of various embodiments of the wind speed compensation structure according to the present invention. Through each graph will be described in more detail for the wind speed compensation structure of the present invention.

4A is a side cross-sectional view and a result graph of the wind speed compensation structure 200a according to the first embodiment. The wind speed compensation structure 200a of the present invention according to the first embodiment has a straight side surface shape perpendicular to the horizontal plane with a height of 10 m as shown in FIG. 4A (A). When the wind speed correction structure 200a is not installed, and the wind speed correction structure 200a is located at the 20m, 40m, 60m, and 80m points in front of the wind generator 100, the calculation result of each wind speed distribution is shown in FIG. 4a (B). In the calculation of the graph, it is assumed that the height (H) of the hub 120 of the wind generator 100 is 80m, the length (R) of one blade 140 is 40m, in Figure 4a (B) to increase the convenience Only the calculation result of the wind speed distribution in the region where the wind generator 100 blade 140 exists (that is, the region between 40 m and 120 m in height) is shown. In the calculation of the other embodiments below, the calculation was performed for the wind generator 100 of the same standard, and when the wind turbines 100 were located at the 20m, 40m, 60m, and 80m points in front of the wind generator 100, the respective wind speed distributions were calculated. .

As shown, when the wind speed compensating structure 200a is not provided (*), the wind speed at the bottom of the region where the blade 140 is present is about 3.75 m / s, and the wind speed at the top of the region is about It appears that it is 4.39m / s, and the wind speed difference is about 0.64m / s, which is very large.

At this time, looking at the result graph when the wind speed correction structure 200a of the present invention having a linear side shape having a height of 10 m is provided at each position, it can be seen that this problem is greatly improved. That is, when the wind speed correction structure 200a is provided at a position of 20 m in front of the wind generator 100 (◆), the wind speed at the bottom end is about 4.12 m / s, the wind speed at the top end is about 4.55 m / s, and the wind speed difference is At about 0.43 m / s, it can be seen that the wind speed difference can be greatly reduced to about 68% when compared with the case where the wind speed compensation structure 200a is not provided (*). At the 40m forward position (●), the wind speed difference is approximately 0.25m / s at 40% level, and at the forward 60m position (▲) wind speed difference is approximately 0.21m / s at 32% level and forward 80m position (■) It is shown that the wind speed difference can be reduced to 43% at about 0.28m / s. According to the calculation result, in the case of the wind speed compensation structure 200a having a linear side shape having a height of 10 m, it can be seen that installing the wind power generator 100 at a position 60 m in front can maximize the wind speed correction effect.

4B is a side sectional view and a result graph of the wind speed compensation structure 200b according to the second embodiment. The wind speed compensation structure 200b of the present invention according to the second embodiment has a straight line of 2m inclined at an angle of 45 ° toward the wind generator 100 at a straight end of 8m in height as shown in FIG. 4B (A). It has a more lateral shape. As described in the description of FIG. 3, the wind speed compensating structure 200b is installed to make the wind speed distribution in the blade region of the wind generator 100 uniform by pushing up the lower air. The wind speed compensation structure 200b of the second embodiment has a shape for guiding the air flow direction so that the air can be pushed up better.

When the wind speed compensating structure 200b is not provided (*), as in the first embodiment of FIG. 4A, the wind speed at the bottom of the region where the blade is present is about 3.75 m / s, The wind speed is about 4.39 m / s, and the wind speed is very large, about 0.64 m / s. In all the embodiments below, the calculated values when the wind speed compensation structure is not provided are the same.

When the wind speed compensation structure 200b is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.40m / s at 62% level, and when the wind speed difference is at the front 40m position (●), the wind speed difference is about 0.27m / If the wind speed difference is 42% at s and 60m ahead (▲), the wind speed difference is about 0.27m / s at 42% level and the front 80m position (■) .The wind speed difference is approximately 0.52m / s at 81%. It can be seen that there is an effect to reduce the wind speed difference.

4C is a side cross-sectional view and a result graph of the wind speed correction structure 200c according to the third embodiment. The wind speed compensation structure 200c of the present invention according to the third embodiment is inclined toward the wind generator 100 in a straight line having a length of 10 m as shown in FIG. 4C (A), and has an angle of 75 ° with respect to the horizontal plane. It has a side shape. Similar to the wind speed compensation structure 200b of the second embodiment, the wind speed correction structure 200c of the third embodiment also has a shape of guiding the air flow direction so that air can be pushed up better.

When the wind speed compensation structure 200c is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.45m / s at 70% level, and the wind speed difference is about 0.28m / If the wind speed difference is about 0.21m / s at 43% level and forward 60m position (▲), the wind speed difference is about 0.33m / s at 51% level when it is at 32% level and forward 80m position (■). It can be seen that there is an effect to reduce the wind speed difference.

4D is a side sectional view and a result graph of the wind speed correction structure 200d according to the fourth embodiment. The wind speed compensation structure 200d of the present invention according to the fourth embodiment has a straight side surface shape perpendicular to the horizontal plane with a height of 5 m as shown in FIG. 4D (A). The wind speed correction structure 200d of the fourth embodiment has the same shape as the wind speed correction structure 200a of the first embodiment, but has only a different standard.

When the wind speed compensation structure 200d is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.45m / s at a 70% level, and the wind speed difference is about 0.52m / The wind speed difference is about 0.63m / s at 81% level and 60m forward (▲) at s, and the wind speed difference is about 0.69m / s at 108% level at about 98% level and (80) forward 80m. In the first to third embodiments, although the wind speed compensation structures 200a to 200c are located at any position, the wind speed difference always appears less than the case where there is no wind speed correction structure. However, in the fourth embodiment, the wind speed correction structure 200d. Depending on the location of the wind speed difference is found to have a uniform effect, and the wind speed difference is found to be a rather large position. That is, it can be seen that there is a close relationship between the height and shape of the wind speed compensation structure and the installation position of the present invention.

In the first to fourth embodiments of FIGS. 4A to 4D, the basic shape of the wind speed compensation structure is a fence shape. In the fifth to ninth embodiments of FIGS. 4E to 4I, the basic shape of the wind speed compensation structure is a building. Show the case of shape. In particular, when the wind speed correction structure of the present invention is a building, the building for monitoring and management, which is built together in most cases when installing a wind generator, can be utilized as the wind speed correction structure. That is, if the building is constructed in accordance with the design range (position, size, etc.) of the wind speed compensation structure proposed by the present invention, there is no need to install a separate wind speed compensation structure, so that no additional cost is incurred.

4E is a side sectional view and a result graph of the wind speed correction structure 200e according to the fifth embodiment. The wind speed compensation structure 200e of the present invention according to the fifth embodiment has a side shape of 10m in height and 5m in thickness as shown in FIG. 4E (A).

When the wind speed compensation structure 200e is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.36m / s at 57% level, and the wind speed difference is about 0.22m / If the wind speed difference is about 0.21m / s at 34% level and forward 60m position (▲), the wind speed difference is about 0.21m / s at 32% level and 80m position forward (■) .The wind speed difference is about 0.45m / s at 70% level. It can be seen that the effect is to reduce the difference.

4F is a side sectional view and a result graph of the wind speed compensation structure 200f according to the sixth embodiment. The wind speed compensation structure 200f of the present invention according to the sixth embodiment has a side shape of 5m in height and 5m in thickness, as shown in FIG. 4F (A).

When the wind speed compensation structure 200f is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.45m / s at 70% level, and the wind speed difference is about 0.56m / If the speed difference is about 87% at s and 60m ahead (▲), the wind speed difference is about 0.64 m / s at 100% level and when it is at 80m position (■) .The wind speed difference is about 0.69 m / s at 108% level. When the height of the wind speed compensation structure is low, as in the shape of the wind velocity compensation structure, the wind speed may be uniform depending on the position, or the wind speed difference may increase depending on the position. Shows.

4G is a side cross-sectional view and a result graph of the wind speed correction structure 200g according to the seventh embodiment. The wind speed compensation structure 200g of the present invention according to the seventh embodiment has an isosceles triangular roof having a height of 2.5m on a side surface shape of 5m in height and 5m in thickness, as shown in FIG. 4G (A).

When the wind speed compensation structure 200g is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.40m / s at 62% level, and the wind speed difference is about 0.39m / The wind speed difference is about 0.53 m / s at the 60% level forward s (▲) at 83% level and the forward wind speed difference is about 0.69 m / s at 108% level (83). The results show that the wind speed may be uniform depending on the location, or the wind speed difference may increase depending on the location.

4H is a side sectional view and a result graph of the wind speed correction structure 200h according to the eighth embodiment. The wind speed correction structure 200h of the present invention according to the eighth embodiment has a semicircular roof having a height of 2.5m on a side surface of 5m in height and 5m in thickness, as shown in FIG. 4H (A).

When the wind speed compensation structure 200h is located at the front 20 m position of the wind generator 100 (◆), the wind speed difference is about 0.46 m / s at 72% level, and the front wind speed difference is about 0.50 m (●). If the wind speed difference is about 0.60m / s at 77% level and forward 60m position (▲), it is 94% level at about 80% position (■) and the wind speed difference is about 0.68m / s at 106% level. Also, the result may show that the wind speed becomes uniform depending on the position, or the wind speed difference may increase depending on the position.

4I is a side sectional view and a result graph of the wind speed compensation structure 200i according to the ninth embodiment. The wind speed compensation structure 200i of the present invention according to the ninth embodiment has a height of 5 m and a thickness of 5 m on the side shape as shown in FIG. It has a triangular roof.

When the wind speed compensation structure 200i is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.34m / s at 53% level, and when the wind speed difference is at the front 40m position (●), the wind speed difference is about 0.30m / If the wind speed difference is about 0.52m / s at 47% level and forward 60m position (▲), the wind speed difference is about 0.72m / s at 109% level when it is 81% level and about 80m position forward (■). The results show that the wind speed may be uniform depending on the location, or the wind speed difference may increase depending on the location.

Although the materials of the wind speed compensation structure are not considered in the first to ninth embodiments of FIGS. 4A to 4I, the materials of the wind speed compensation structure are porous in the tenth to eleventh embodiments of FIGS. 4J to 4K. That is, the wind speed compensating structure does not necessarily have to be an artifact, and for example, a natural material such as a tree may serve as the wind speed compensating structure. However, in the case of trees, the wind is not completely blocked, but partially escapes. Therefore, when the trees are located, it can be thought that they are theoretically the same condition as the fence made of porous material.

4J is a side sectional view and a result graph of the wind speed compensation structure 200j according to the tenth embodiment. The wind speed compensation structure 200j of the present invention according to the tenth embodiment has a straight side surface shape perpendicular to the horizontal plane with a height of 10m as shown in FIG. 4J (A), having a porosity of 50% and a thickness of 4m. Assume that

When the wind speed compensation structure 200j is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.58m / s at 91% level, and the wind speed difference is about 0.56m / If the wind speed difference is about 0.54m / s at 87% level and the forward 60m position (▲), the wind speed difference is about 0.54m / s at 85% level and the wind speed difference is about 0.56m / s (87%). It can be seen that there is an effect to reduce the wind speed difference.

4K is a side cross-sectional view and a result graph of the wind speed correction structure 200k according to the eleventh embodiment. The wind speed compensation structure 200k of the present invention according to the eleventh embodiment has a straight side surface shape perpendicular to the horizontal plane with a height of 10m as shown in Fig. 4k (A), having a porosity of 30% and a thickness of 4m. Assume that

When the wind speed compensation structure 200k is located at the front 20m position of the wind generator 100 (◆), the wind speed difference is about 0.54m / s at 85% level, and the wind speed difference is about 0.48m / The wind speed difference is about 0.48m / s at 75% level and the forward 60m position (▲), and the wind speed difference is about 0.51m / s at 79% level when it is 75% level and about 80m position (■). It can be seen that there is an effect to reduce the wind speed difference.

The following table is a comparison table of the top-bottom wind speed difference in each of the wind speed correction structures of the first to eleventh embodiments shown in FIGS. 4A to 4K, and FIG. 5 is a graph showing the following table by type.

Figure 5 (A) is a graph showing the effect of the wind speed distribution correction of the structure for the wind speed correction in the form of a fence. As shown, except for the fourth embodiment (5 m in height), it can be seen that there is an effect that the wind speed difference between the uppermost and the lowermost at all positions is corrected to about 70% or less. In particular, in the first to third embodiments, there is an effect of reducing the wind speed difference by more than 50% when the wind speed compensation structure is in the vicinity of a 60m position in front of the wind power generator, thereby showing an excellent wind speed correction effect.

Figure 5 (B) is a graph showing the effect of the wind speed distribution correction of the structure for the wind speed correction structure in the form of a building. In FIG. 5 (A), it was found that the lower the height, the more the wind speed distribution correction effect tends to decrease. In FIG. 5 (B), the lower the height is (the wind speed correction structure of the sixth embodiment has the lowest height of 5 m). It can be seen that the correction effect is reduced. Referring to FIG. 5 (B), in the case of the fifth embodiment, that is, a simple rectangular parallelepiped structure having a height of 10m, the wind speed correction effect is most excellent, and in particular, the wind speed correction structure is near the 40m position in front of the wind generator. It can be seen that there is an effect of reducing the wind speed difference by more than 50%.

Figure 5 (C) is a graph showing the effect of the wind speed distribution correction of the porous structure for the correction of wind speed. In the case of the porous wind speed compensation structure, the wind speed compensation effect is considerably small, with the minimum value of the wind speed difference being 75%, but the variation of the wind speed compensation effect according to the position is much smaller.

4A to 4K and 5, it can be clearly seen that the wind speed correction structure erected in front of the wind power generator has a difference in wind speed correction depending on the height, location, and material. In the present invention, the above results were determined to determine the height, location, and material range of the wind speed compensation structure to maximize the wind speed correction effect.

In the case of a fence-shaped wind speed compensation structure, when the height is about 10 m (first embodiment, second embodiment, and third embodiment), the wind speed correction effect is very large. However, when the height is 5m (fourth embodiment), it can be seen that the wind speed correction effect is insignificant. Therefore, in the case of a fence-shaped wind speed compensation structure, it can be seen that it is most appropriate that the height is about 10 m, and that the wind speed correction effect is most high when the position is 40 m to 60 m. Based on the position where the wind speed difference is 50% or less, the position range is about 35m to about 65m. The numerical range is a value obtained according to the specification of the wind generator 100 used in the calculation of the present invention, and the wind speed correction is a ratio based on the height HR of the lower blade 140a of the wind generator 100. Since the height of the structure 200 is determined and the position of the wind speed correction structure 200 has a strong correlation, it is preferable to determine the position based on the height of the wind speed correction structure 200.

In the embodiment of Figure 5 (A), the height of the wind speed compensation structure 200 is 25% (10m) of the height (HR: 40m) of the lower blade (140a) of the wind generator 100, the wind speed compensation structure ( The position range of 200 is calculated to be 3.5 times to 6.5 times the height 10m. Of course, if the height of the wind speed compensation structure 200 is changed, the position range is also changed.

In summary, in the case of a fence-shaped wind speed compensation structure, the wind turbine 100 has a height of 20% to 40% of the height HR of the lower blade 140a of the wind generator 100, and the wind generator 100 is in front of the wind generator 100. It is most preferably provided at a position spaced 2 to 8 times the height of the wind speed compensation structure 200 in the direction.

In the case of a wind speed compensation structure having a building shape, when referring to FIG. 5 (B), if the height is 7.5m to 10m (Fifth Embodiment, Seventh Embodiment, and Eighth Embodiment), Although the wind speed correction effect appeared relatively large, it can be seen that when the height is 5m (sixth embodiment), the wind speed correction effect is negligible in almost the entire position region. Therefore, it is appropriate that the height is about 10m even in the case of a building-shaped wind speed compensation structure. In addition, the location where the wind speed difference is minimized is generally about 40m, but there is no roof, that is, a building having a rectangular parallelepiped shape (5th embodiment) / a building having a right triangle shape roof (ninth embodiment) / In case of a building with an isosceles triangle roof (Example 7) / In case of a building with a semicircular roof (Example 8), the wind speed difference effect was shown to be higher in order. In the case of having a shape, the wind speed difference correction effect tends to decrease rapidly when the position is 40m away. Therefore, it is preferable to determine the position of the wind speed compensation structure at about 30m to about 50m, which is a location range where the influence of the roof shape is minimized. In this case, of course, it is preferable to arrange the wind turbine generator based on the hub height H of the wind generator as in the fence-shaped wind speed compensation structure.

In the embodiment of Figure 5 (B), the height of the wind speed compensation structure 200 is 25% (10m) of the height (HR: 40m) of the lower blade (140a) of the wind generator 100, the wind speed correction structure ( The position range of 200 is calculated to be three to five times the height 10m. Of course, if the height of the wind speed compensation structure 200 is also changed, the position range is also changed.

Summarizing these results, in the case of a wind speed compensation structure having a building shape, the wind turbine 100 has a height of 20% to 40% of the height HR of the lower blade 140a, and the wind generator 100 is in a forward direction. It is most preferably provided at a position spaced 2 to 6 times the height of the wind speed compensation structure 200.

In the case of the windbreak compensation structure of the windbreak forest shape, referring to FIG. 5 (C), the lower the porosity, the larger the wind speed correction effect, and in this case, the influence of the position is different from that of the wind speed correction structure of the other shape. Very few in comparison.

That is, in the case of a windbreak compensation structure having a windbreak shape, the porosity is 50% or less, and has a height of 20% to 40% of the height HR of the lower blade 140a of the wind generator 100, and the wind generator 100 is in front of the wind generator 100. It is preferably provided at a position spaced 2 to 10 times the height of the wind speed compensation structure 200 in the direction.

6 is another embodiment of the structure for adjusting the wind speed of the present invention. 4A to 4K, the width of the wind speed compensating structure 200 was not specified. However, when viewed from above, the embodiment of FIGS. 4A to 4K has the same shape as that of FIG. 6A. Is formed.

However, since the wind blowing into the wind generator 100 does not always blow in only one direction, the wind speed compensation structure 200 has a shape surrounding the wind generator 100 as shown in FIG. 6 (B). It can also be installed. In this case, the wind speed compensation structure 200 is made of a curve including a circle or an ellipse formed in a shape surrounding the wind generator 100 with a radius of a predetermined distance around the wind generator 100. .

Or the wind speed compensation structure 200 of the present invention, may be installed so as to surround only a part of the wind generator 100, not the entire circumference. 6 (C) illustrates this case. As illustrated, the wind speed compensating structure 200 is provided only in a predetermined angular region and is formed in a curve including a portion of an arc or an ellipse. Of course, the angle (α) region may be appropriately determined theoretically or experimentally, and is preferably provided on an angle region of ± 15 ° to ± 90 ° with respect to the front direction of the wind generator 100.

The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

1 is a boundary layer generation principle.

2 is a typical wind generator.

3 is a wind speed distribution correction principle of the wind speed compensation structure of the present invention.

4a to 4f are several embodiments of the wind speed compensation structure of the present invention.

5 is a graph comparing the results of correction according to various embodiments of the structure for adjusting the wind speed of the present invention.

Figure 6 is another embodiment of the wind speed compensation structure of the present invention.

** Description of the symbols for the main parts of the drawings **

100: wind power generator

110: pillar

120: hub

130: spinner

140: blade

200: wind speed compensation structure (of the present invention)

Claims (9)

As a wind speed compensation structure 200 formed of an artificial or natural object including a fence, a building, or a windbreak forest, and having a predetermined height, On the ground surface of the position spaced apart from the wind generator 100 by a predetermined distance from the wind generator 100 so that the wind speed of the wind flowing into the wind generator 100 is provided at a predetermined distance spaced apart from the front direction, It is formed in a fence shape, has a height of 20% to 40% of the height (HR) of the lower blade (140a) of the wind generator 100, the height of the wind speed compensation structure 200 in the wind generator 100 forward direction Wind speed compensation structure, characterized in that provided in a position 2 to 8 times spaced apart. delete delete According to claim 1, wherein the wind speed compensation structure 200 Part or whole of the body is a wind speed compensation structure, characterized in that formed to be inclined at a predetermined angle toward the wind generator (100) perpendicular to the ground surface. According to claim 1, wherein the wind speed compensation structure 200 It is formed in the form of a building, Has a height of 20% to 40% of the height (H-R) of the lower blade 140a of the wind generator 100, The wind speed generator 100 is a wind speed compensation structure, characterized in that provided in a position spaced two to six times the height of the wind speed correction structure 200 in the forward direction. According to claim 1, wherein the wind speed compensation structure 200 It is formed in the shape of a windbreak with a porosity of 50% or less. Has a height of 20% to 40% of the height (H-R) of the lower blade 140a of the wind generator 100, The wind speed generator 100, the wind speed compensation structure characterized in that it is provided at a position spaced 2 to 10 times the height of the wind speed correction structure 200 in the forward direction. According to claim 1, wherein the wind speed compensation structure 200 The wind speed compensation structure, characterized in that made of a curve including a circle or an ellipse formed in a shape surrounding the wind generator (100) having a radius of a predetermined distance around the wind generator (100). The method of claim 7, wherein the wind speed compensation structure 200 The wind speed compensation structure, characterized in that it is provided only in a predetermined angle region consisting of a curve including a portion of an arc or an ellipse. The method of claim 8, wherein the wind speed compensation structure 200 The wind power generator 100 is a wind speed compensation structure, characterized in that provided on the angle region of ± 15 ° to ± 90 ° around the front direction.

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