KR20110007671A - A appratus for wind tunnel testing of wind power generator with large size blade - Google Patents

Abstract

PURPOSE: An apparatus for testing a wind tunnel of a wind power generator with large blades is provided to enable a wind tunnel teat of a wind power generator with large blades since a wind force blade device corresponding to a large blade is installed. CONSTITUTION: An apparatus for testing a wind tunnel of a wind power generator with large blades comprises an object wind power generator, a wind force blade(20), a wind force blade rotation device, and a controller. The object wind power generator is tested. The wind force blade is installed inside the blade frame. The blade frame has the size corresponding to the blade(11) of the object wind power generator. The wind force blade rotation device generates wind and blows the wind to the blade of the object wind power generator. The controller controls the speed of wind of a wind generation unit(30).

Description

Wind tunnel test equipment for large blade wind turbines {A APPRATUS FOR WIND TUNNEL TESTING OF WIND POWER GENERATOR WITH LARGE SIZE BLADE}

The present invention relates to a wind tunnel test apparatus for a wind turbine, and in particular, by installing a wind generating blade unit corresponding to a large blade of a large blade wind turbine, the wind turbine is rotated by the wind generated by the wind blade generator, and The present invention relates to a wind tunnel testing device for a large blade wind turbine, which rotates the wind turbine blade device in synchronization with the rotation to follow the blades of the wind turbine so that the wind tunnel test of the wind turbine with the large blade can be performed.

Recently, as the environmental problems caused by the depletion of fossil energy and the use of fossil energy have become serious, research and attention on renewable energy have been focused, and various renewable energy is being practically used. Wind generators are the most energy-intensive energy sources with solar power generation as the renewable energy sources as described above.

Wind turbines require a lot of initial investment in installation, so they invest in facilities considering productivity and efficiency. Therefore, it is very important to install a wind turbine once and operate it for a long time.

Therefore, it is most desirable to design the wind power generator in consideration of the wind information of the installation site in consideration of the size of the blade, power transmission means, generator capacity, etc., which can effectively produce electricity. To this end, wind tunnel tests that can identify the financial resources of the wind turbine and the correlation with the wind are essential.

The wind tunnel test of wind power generators is designed to determine how much wind power the wind power generator can obtain by low speed, medium speed, high speed, typhoon, wind power, how much power capacity can be obtained, and the vibration and balance of the wind power generator. In order to test the stability of the vehicle, the efficiency of the power transmission means, the stability of the heat generation, and the like, in the case of a wind turbine having a small blade, a wind tunnel test is made of a closed space wind tunnel test.

However, in the case of a large blade having a blade diameter of 10 m or more, even if a wind tunnel test room is made, it is difficult to make a wind generator having a diameter of 10 m or more, that is, a blower fan or a turbine, and is installed using a plurality of high-performance blower fans or turbines. Even if the wind tunnel laboratory itself is too expensive to create a disadvantage.

In current wind turbines, wind generators with blades with diameters of 20 to 30 m are being studied as high capacity generators. These blades are not subjected to wind tunnel tests, but are installed on site and tested by wind generated by natural phenomena. It was just to do. Therefore, the wind speed of the rated wind could not be easily found, and the wind speed of the limit wind was not known, so it was difficult to guess the brake timing for protecting the wind power generator, or to set the brake wind speed based on the experience value, and to test the vibration and balance. .

The trend of wind turbines is getting bigger and larger. Wind turbines are required to test large wind turbines. However, if wind turbine blades reach several tens of meters, wind tunnels can be enormously expensive and technical. A problem arises.

As such, although the wind tunnel test is required in the conventional wind turbine, the large blade wind turbine does not perform the wind tunnel test, and it is difficult to design in consideration of safety and efficiency since it is only a test that depends on the natural wind after installation in the field. In order to solve this problem, the present invention is to provide a wind tunnel test apparatus for a large blade wind turbine.

Wind tunnel test apparatus of a large blade wind turbine according to the present invention is to provide a wind generating blade device corresponding to the large blade to generate the wind and to use the wind tunnel test of a large blade wind turbine.

In addition, the present invention is to enable the wind tunnel test for various wind strength by freely adjusting the strength of the wind.

In addition, the present invention is to be able to test the output capacity, such as the efficiency of the wind strength, as well as the vibration or stability test of the wind power generator.

The object of the present invention as such,

A test wind turbine generator to be a wind tunnel test target;

A wind generation blade installed in the blade frame having a size corresponding to the blade of the wind generator to be tested, and generating wind and blowing air to the blade of the wind generator to be tested;

A wind turbine blade rotating device for rotating the wind turbine blade by a motor at the same height as the wind turbine to be tested;

The wind speed is generated by detecting the blade rotation phase angle of the wind turbine under test by detecting the rotational speed of the wind turbine under test by controlling the wind turbine blade rotating device to be rotated at the same speed as the wind speed of the wind turbine under test. It is characterized in that it comprises a control device to follow the rotation phase angle of the blade to match, and detect the wind speed to control the wind speed of the wind generating means of the wind generating blade.

Here, the test on the vibration / balance, output efficiency and other test target items of the test wind turbine further comprises a test device for directly monitoring or installing various sensors and testing and extracting using their information.

In addition, the present invention is installed by facing the wind turbine blades and the wind turbine generator to face each other, the front of the wind turbine blades is configured to further install an air filter for changing the vortex to a straight wind.

The wind turbine blade according to the present invention,

A blade frame which forms an edge edge of the blade in a size and a shape corresponding to the blade of the wind turbine to be tested, and is fixed to one shaft at the center; It includes a wind generating means installed in the blade frame in multiple stages, wherein the wind generating means is configured by installing a blowing fan or a blowing turbine.

The wind turbine blade rotating device,

A tower for installing the wind turbine blade at the same height as the wind turbine; Installed in the tower is configured to include a motor for rotating the shaft of the wind turbine blade.

The air filter is fixed to the end portion of the shaft protruding toward the front of the wind turbine blades, is fixed to be spaced apart from the wind turbine blades at regular intervals, and has an area equal to or larger than the blade frame of the wind turbine blades It is characterized in that the branch is a multi-stage slit plate structure of the blade type.

 The control device,

Rotational speed detection means for detecting a rotational speed of the rotational shaft of the test wind turbine;

Wind speed detecting means for detecting wind speed at the front end of the wind turbine blade;

Blade position tracking detecting means for detecting position tracking information of the blade of the wind turbine under test in the wind generating blade;

Based on the test wind speed input information for the wind tunnel test and the detection signal of the wind speed detecting means, the wind generating means of the wind generating blade is controlled to be the corresponding wind speed, thereby maintaining the wind speed, and maintaining the wind speed. A controller for automatically controlling the wind turbine generator to follow the rotational position of the wind turbine blade with respect to the blade rotation position of the wind turbine to be detected by the position tracking detecting means in response to the rotational speed;

And an input means for operating the wind tunnel test and inputting the test wind speed, and a display means for displaying the rotational speed, the wind speed, and the operation state information according to the wind tunnel test.

Such a present invention is to install a wind generating blade using a blower fan or a blower turbine in response to a large blade wind turbine, and by using the wind blowing wind to the wind turbine generator by allowing the wind tunnel test, large wind tunnel Wind tunnel testing of large blade wind turbines is possible without the need for a laboratory. In addition, by synchronizing the rotation of the blades of the wind turbine and the wind turbine to be matched with each other, and rotating the wind turbine blade to match the rotational speed of the wind turbine to be tested, the wind power of the large blade only with the wind turbine blade using a plurality of small blower fan The wind tunnel test can be performed by rotating the generator, and the wind speed for the test can be adjusted, so that the test can be performed according to various wind conditions. In addition, by installing an air filter in front of the wind generating blades to prevent vortex generation, and by allowing the straight wind to be blown to the wind turbine to be tested, effective blowing is possible. In addition, it is possible to test effectively by controlling the rotation of the wind turbine and the wind turbine blade under test through blade tracking and rotation speed tracking.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic front view of a wind generating blade according to the present invention, Figure 2 is an exemplary view showing a test state of a large blade wind tunnel test apparatus according to the present invention, Figure 3 is an enlarged view of the main portion of the large blade wind tunnel test apparatus according to the present invention. 4 and 5 are block diagrams of a large blade wind tunnel test apparatus according to the present invention.

As shown therein,

A test target wind generator 10 to be a wind tunnel test target;

The wind generating means 30 is installed in a blade frame 21 having a size corresponding to the blade 11 of the wind turbine generator 10, and generates wind to generate the blade 11 of the wind turbine generator 20. Wind-generating blade 20 for blowing in);

A wind turbine blade rotating device (50) for rotating the wind turbine blade (20) by a motor (52) at the same height as the wind turbine (10) to be tested;

By detecting the rotational speed of the test wind turbine 10, while controlling the wind generating blade rotating device 50 is rotated at the same speed as the rotation speed of the wind turbine test target 10, the wind turbine test target 10 A control device for tracking the rotational position of the wind turbine blade 20 by tracking the rotational position of the blade 11, and detecting the wind speed to control the wind speed of the wind generating means 30 of the wind turbine blade 20 It consists of 60.

Here, a test monitoring device for directly testing or installing various sensors and testing and extracting using the information of the vibration / balance, output efficiency and other test target items of the test wind turbine 10 (see FIG. Not shown) may be further included and implemented through the control device 60 of the present invention.

In addition, the present invention, as shown in Figure 2, install the wind turbine blades 20 and the wind turbine generator 10 to face each other, the front of the wind turbine blades 20 to the vortex in a straight wind It is configured by further installing an air filter 40 for changing.

The wind turbine blade 20,

A blade frame 21 which forms an edge edge of the blade in a size and a shape corresponding to the blade 11 of the wind turbine 10 to be tested, and is fixed to one shaft 22 at a central portion thereof; It includes a wind generating means 30 is installed in the blade frame 21 in multiple stages, the wind generating means 30 is configured by installing a blowing fan or a blowing turbine.

The wind turbine blade rotating device 50,

A tower (51) for installing the wind turbine blade (20) at the same height as the test wind turbine (10); Installed in the tower 51 is configured to include a motor 52 for rotating the shaft 22 of the wind turbine blades (20).

The air filter 40 has a central portion fixed to an end portion of the shaft 22 protruding toward the front of the wind turbine blades 20, and spaced apart from the wind turbine blades 20 at regular intervals. It is fixed to be maintained in the interval, characterized in that the blade type multi-stage slit plate structure having the same or wider area than the blade frame 21 of the wind turbine blade (20).

 The control device 60,

Rotational speed detection means (61) for detecting a rotational speed of the rotational shaft of the test wind turbine (10);

Wind speed detecting means (63) for detecting wind speed at the front end of the wind turbine blade (20);

Position tracking detecting means (62) for detecting position tracking information of the blade of the wind turbine (10) to be tested at the wind turbine (20);

Based on the test wind speed input information for the wind tunnel test and the detection signal of the wind speed detecting means 63, the wind generating means 30 of the wind generating blade 20 is controlled to be the corresponding wind speed to maintain the wind speed, and the rotation On the basis of the signal detected by the position tracking detection means 62 corresponding to the rotational speed of the test wind turbine 10 of the speed detecting means 61 and the blade rotation position of the test wind turbine 10 and the A controller 64 for automatically controlling the wind turbine generator 50 so that the rotational position of the wind turbine blade 20 is matched;

And an input means 65 for operating the wind tunnel test and inputting the test wind speed, and a display means 66 for displaying the rotational speed, the wind speed, and the operation state information according to the wind tunnel test.

The present invention configured as described above is for the wind tunnel test of a wind power generator having a large blade, and constitutes a wind turbine blade 20 in a large blade shape. The wind turbine blade 20 is configured as a blade of the wind turbine 10 under test, that is, as a horizontal blade having three blades, and a frame is made of the blade frame 21, a plurality of wind generation in the border The means 30 are installed. The wind generating means may install a small blower fan or a blower turbine, and in the normal test, small blower fans, which are relatively inexpensive, are installed in the blade frame 21.

As such, the wind turbine blade 20 is configured and rotatably installed by the wind turbine blade rotating device 50, which installs the motor 52 in the tower 51, and the motor 52 allows the It is configured to rotate the shaft 22 of the wind turbine blade 20.

And the air filter 40 is installed on the front surface of the wind turbine blade 20, the air filter 40 is to blow the wind blowing the front by changing the vortex to a straight wind, to install a blowing fan in the wind turbine blade 20 When the fan of the fan is rotated, the wind is generated, so the vortex is generated, so that it is blown by converting it into a straight wind in front.

As such, when the wind is generated by driving the blower fan, which is the wind generating means 30, and the air is blown to the wind turbine 10 under test through the air filter 40, the wind is blown onto the blade of the wind turbine 10 under test. The wind turbine 10 under test starts to rotate as it is blown.

At this time, when the user sets the test wind speed through the input means 65, the wind generating means 30 is controlled and driven by the control of the controller 65, and the wind speed detected by the wind speed detection means 63 is set. By controlling the drive output of the wind generating means 30 to be the wind speed is controlled to the desired set wind speed. Of course, it is possible to selectively use a method of adjusting the drive output of the blower fan to reach the desired wind speed, and a method of generating the wind at the desired wind speed by adjusting the number of the blower fan, that is, the number of the driving fan to drive. When excessive wind speed such as typhoon is required, the wind generating blade may be replaced with a wind generating blade having a blow turbine installed as a wind generating means 30 in the wind generating blade 20 to generate the wind of the overwind speed.

When the wind of the wind speed to be tested by controlling the wind generating means as described above, the test wind turbine (10) is rotated by the wind, the rotation speed detection means 61 of the rotation of the test wind turbine (10) Detect speed.

The controller 64 receives the rotational speed information of the wind turbine 10 under test from the rotational speed detecting means 61 and controls the wind turbine blade rotating device 50 in accordance with the rotational speed information to generate the wind turbine blades 20. Rotate). This controls the motor 52 to match the rotational speed.

On the other hand, when the blades of the wind turbine blades 20 and the wind turbine generator 10 are not matched with each other, the wind is wasted and not properly received, so they must match. To this end, by installing the position tracking detection means 62 in the wind turbine blade 20 to track the blade position of the wind turbine generator 10 to be tested.

For example, a sensor (eg, an infrared sensor) capable of remotely detecting a blade of the wind turbine 10 under test is installed at both ends with respect to the width of one blade of the wind turbine blade 20. Accordingly, when two sensors simultaneously detect a state in which the blades coincide with each other, only one of them senses the rotational phase of the wind-generating blade 20 in a direction that cannot be detected, and repeats sensing and non-sensing. In this case, the rotation speed of each other is different.

Therefore, when the sensing / non-sensing is repeated, the rotation speed is matched by controlling the wind turbine blade rotating means 50 in synchronization with the rotation speed detected by the rotation speed detecting means 61. Then, if the rotational speed is matched, only one of the two sensors detects, the other does not detect, neither detects both, or both. By analyzing this state and finely adjusting the driving speed of the motor 52 by matching the rotational position of the blade 11 of the wind turbine blade 20 and the wind turbine generator 10 to be tested, the wind turbine blade 20 The generated wind can be blown to the blade 11 of the wind turbine under test. This rotation position tracking method can be achieved by precisely controlling the speed of the motor 52 in a PWM method by automatically calculating and processing by a program through several experiments.

According to the present invention, even in a wind turbine having a large blade having a diameter of 20-50m, it is possible to install a test apparatus at low cost without having to install a separate tunnel type large wind tunnel test apparatus. The wind speed can be tested while the wind speed is controlled by the test wind speed, the vibration and balance of the large blade can be sufficiently monitored, and the wind speed characteristics and specifications can be tested.

1 is a front schematic view of a wind turbine blade according to the present invention;

Figure 2 is an illustration of a test state of a large blade wind tunnel test apparatus according to the present invention.

Figure 3 is an enlarged view of the main portion of the large blade wind tunnel test apparatus according to the present invention.

4 and 5 is a block diagram of a large blade wind tunnel test apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: Wind turbine under test 11: Blade of wind turbine under test

20: wind turbine blade 21: blade frame

22: shaft 30: wind generating means

40: air filter 50: wind turbine blade rotating means

51: tower 52: motor

60: control device 61: rotational speed detection means

62: position tracking detection means 63: wind speed detection means

64: controller 65: input means

66: display means

Claims (7)

In the wind tunnel test apparatus of the wind power generator, A test target wind generator 10 to be a wind tunnel test target; The wind generating means 30 is installed in a blade frame 21 having a size corresponding to the blade 11 of the wind turbine generator 10, and generates wind to generate the blade 11 of the wind turbine generator 20. Wind-generating blade 20 for blowing in); A wind turbine blade rotating device (50) for rotating the wind turbine blade (20) by a motor (52) at the same height as the wind turbine (10) to be tested; By detecting the rotational speed of the test wind turbine 10, while controlling the wind generating blade rotating device 50 is rotated at the same speed as the rotation speed of the wind turbine test target 10, the wind turbine test target 10 A control device for tracking the rotational position of the wind turbine blade 20 by tracking the rotational position of the blade 11, and detecting the wind speed to control the wind speed of the wind generating means 30 of the wind turbine blade 20 Wind tunnel test device for a large blade wind turbine, characterized in that configured to include (60). The method of claim 1, wherein the vibration / balance, output efficiency, and other test subjects of the test wind turbine 10 are directly monitored or various sensors are installed, and the test and test result information is obtained using the information. Wind tunnel test device for a large blade wind turbine, characterized in that further comprises a test monitoring device to extract. The method of claim 1, wherein the wind turbine blades 20, A blade frame 21 which forms an edge edge of the blade in a size and a shape corresponding to the blade 11 of the wind turbine 10 to be tested, and is fixed to one shaft 22 at a central portion thereof; Wind generating means 30 including the wind generating means 30 is installed in multiple stages on the blade frame 21, the wind generating means 30 is a wind tunnel test of a large blade wind turbine, characterized in that installed by installing a blowing fan or a blow turbine Device. According to claim 1, The wind generating blade rotating device 50, A tower (51) for installing the wind turbine blade (20) at the same height as the test wind turbine (10); The wind tunnel test apparatus of the large blade wind turbine generator, characterized in that it comprises a motor (52) installed in the tower (51) for rotating the shaft (22) of the wind turbine blade (20). The method according to any one of claims 1 to 4, The wind turbine blades 20 and the test wind turbine 10 are installed to face each other, and an air filter 40 is further installed on the front surface of the wind turbine blades 20 to change vortices into straight wind. Wind tunnel test device of a large blade wind turbine, characterized in that configured. The method of claim 5, wherein the air filter 40, A central portion is fixed to an end portion of the shaft 22 protruding toward the front of the wind turbine blades 20, and fixedly spaced apart from the wind turbine blades 20 at regular intervals to maintain a gap in the blade frame 21. And a wind blade testing apparatus for a large blade wind turbine generator, characterized in that it is composed of a blade type multi-stage slit plate structure having the same or wider area as the blade frame 21 of the wind turbine blades 20. The method of claim 1, wherein the control device 60, Rotational speed detection means (61) for detecting a rotational speed of the rotational shaft of the test wind turbine (10); Wind speed detecting means (63) for detecting wind speed at the front end of the wind turbine blade (20); Position tracking detecting means (62) for detecting position tracking information of the blade of the wind turbine (10) to be tested at the wind turbine (20); Based on the test wind speed input information for the wind tunnel test and the detection signal of the wind speed detecting means 63, the wind generating means 30 of the wind generating blade 20 is controlled to be the corresponding wind speed to maintain the wind speed, and the rotation On the basis of the signal detected by the position tracking detection means 62 corresponding to the rotational speed of the test wind turbine 10 of the speed detecting means 61 and the blade rotation position of the test wind turbine 10 and the A controller 64 for automatically controlling the wind turbine generator 50 so that the rotational position of the wind turbine blade 20 is matched; A large blade wind turbine comprising an input means 65 for operating the wind tunnel test and inputting the test wind speed, and a display means 66 for displaying the rotational speed, the wind speed, and the operation state information according to the wind tunnel test. Wind tunnel test equipment.

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