CN219570261U - Device for accurately positioning cross rod of anemoscope on wind measuring tower of wind turbine generator - Google Patents

Abstract

The utility model discloses a device for accurately positioning a cross rod of a anemoscope on a wind measuring tower of a wind turbine generator, which comprises three Beidou antennas A, B, C, a signal processor and a display; the big dipper antenna A sets up in the tower base central point department of anemometer tower, big dipper antenna B sets up in the outer extreme point department of main anemoscope horizontal pole of anemometer tower, big dipper antenna C sets up in the outer extreme point department of the reference anemoscope horizontal pole of anemometer tower, big dipper antenna B, C's horizontal projection is unanimous with tower base central point tie direction and horizontal pole direction, the positioning signal of big dipper satellite is received to three big dipper antenna A, B, C, and carry out radio communication with signal processor respectively, give signal processor with the longitude and latitude coordinate transmission of each, signal processor is connected with the display, the result after the signal processor processing is shown through the display, main anemoscope horizontal pole promptly, reference anemoscope horizontal pole and the contained angle of north direction. The utility model has the characteristics of quick measurement time, high precision, small volume, light weight, portability, convenient use and the like.

Description

Device for accurately positioning cross rod of anemoscope on wind measuring tower of wind turbine generator

Technical Field

The utility model relates to the technical field of wind measuring towers of wind turbines, in particular to a device for accurately positioning a cross rod of an anemoscope on the wind measuring tower of a wind turbine.

Background

The wind measuring tower is an important component of load and power characteristic test in model identification of the wind turbine generator, and is set up for a prototype to accurately reflect wind resource conditions in the range of the prototype, so that powerful data support is provided for model test and identification of the prototype. According to statistical analysis, an error of about 30% of annual capacity of the wind turbine may be caused by an error of 10% of wind measurement data, and because wind resource data is not accurate enough, judgment errors such as turbulence, maximum wind speed, wind direction and the like are caused, even load calculation and judgment of the wind turbine are fundamentally affected, and great hidden hazards are buried for authentication matters and safe operation of subsequent wind turbines.

At present, wind measuring towers of wind turbines are all installed in main wind directions of measuring sectors within a range from 2D to 4D (D is the diameter of a wind wheel of the wind turbine), and the heights of the wind measuring towers are generally consistent with the heights of the centers of hubs of the wind turbines (most of the wind measuring towers are more than 100 meters). The wind measuring tower tested in the model is usually a stay wire type wind measuring tower, the stress is reasonable, the reliability is high, the section of the tower body is small, the consumption of tower materials is small, the wind measuring tower is generally a triangular truss structure, the shape is stable, the wind load effect of the tower is small, the wind resistance is strong, and the wind measuring tower is most economical.

The wind speed meter, the wind vane and the monitoring equipment such as humiture, air pressure and the like are arranged at different heights of the tower body. The main anemoscope is arranged at the position 3m below the main anemoscope and is positioned opposite to the reference anemoscope, the reference anemoscope is positioned at the position 3m below the main anemoscope and is on the same side as the main anemoscope, the transverse rod installation directions of the two anemoscopes are vertical to the main wind direction, and when the anemoscope is fastened to the transverse rod, the N point of the anemoscope is aligned with the inner measurement of the transverse rod. After the anemoscope is installed, the included angle between the cross bar and the north direction needs to be measured.

At present, the method for measuring the included angle between the wind vane cross bar and the north direction is as follows: the observer walks around the direction of the cross rod of the anemoscope, is generally about 200m away from the center of the tower foundation, the observer uses a telescope to observe whether the cross rod is on the same straight line with the observer, if not, the observer continues to observe around the tower until the observer determines that the observer is on the same straight line with the cross rod, the position point of the observer at the moment is recorded, and the two-point connecting line measures the included angle between the cross rod of the anemoscope and the north direction due to the known center point of the tower foundation.

The manual observation method has a plurality of limitations on the positioning of the cross bars on the anemometer tower. For example, the method has strong subjectivity, mainly depends on the observation direction of human eyes, and can cause larger errors of observation points of different people, so that inaccurate calculation results and larger error lines can finally influence the correct measurement of a wind direction interval, and the result and authentication of the pattern test are also not strict enough, so that a certain risk exists in the later stage.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings of the prior art, and provides a device for accurately positioning a cross rod of an anemoscope on a wind measuring tower of a wind turbine, which has the characteristics of quick measurement time, high precision, small volume, light weight, convenience in carrying and use and the like.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: the device for accurately positioning the cross rod of the anemoscope on the anemometer tower of the wind turbine generator comprises three Beidou antennas A, B, C, a signal processor and a display; the big Dipper antenna A is arranged at the tower base center point of the anemometer tower, the big Dipper antenna B is arranged at the outer end point of the main anemoscope cross rod of the anemometer tower, the big Dipper antenna C is arranged at the outer end point of the reference anemoscope cross rod of the anemometer tower, the horizontal projection of the big Dipper antenna B, C is consistent with the connecting line direction of the tower base center point and the cross rod direction, the three big Dipper antennas A, B, C receive positioning signals of big Dipper satellites and respectively carry out wireless communication with a signal processor, longitude and latitude coordinates of each big Dipper satellite are transmitted to the signal processor, the signal processor is connected with a display, and the processed results of the signal processor are displayed through the display, namely the main anemoscope cross rod, the reference anemoscope cross rod and the included angle in the north direction.

Further, the anemometer tower is of a triangular truss structure.

Further, the lengths of the main anemoscope cross bar and the reference anemoscope cross bar are 2-4 m.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the wind direction measuring device has the characteristics of quick measuring time, high precision, small volume, light weight, portability, convenient use and the like, can quickly and accurately detect the real direction of the cross rod of the wind direction instrument (the cross rod of the main wind direction instrument and the cross rod of the reference wind direction instrument) installed on the tower under the condition of no shutdown in the construction process of installing the wind measuring tower of the wind turbine, and provides accurate data basis for measuring wind direction and pattern test of technicians, thereby ensuring that the measured data of the wind turbine is more accurate, avoiding human errors and ensuring that the pattern test authentication of the wind turbine is more rigorous.

Drawings

Fig. 1 is a schematic structural view of the device of the present utility model.

Fig. 2 is a schematic view of a horizontal projection of a anemometer tower.

Detailed Description

The present utility model will be described in further detail with reference to examples and drawings, but embodiments of the present utility model are not limited thereto.

As shown in fig. 1 and 2, this embodiment discloses a device for accurately positioning a cross bar of a anemometer on a wind turbine generator set anemometer tower, the wind meter tower 3 is generally in a triangular truss structure, the device includes three Beidou antennas A, B, C, a signal processor 4 and a display 5, the Beidou antenna a is arranged at a tower base center point of the wind meter tower 3, the Beidou antenna B is arranged at an outer end point of a main anemometer cross bar 1 of the wind meter tower 3, the Beidou antenna C is arranged at an outer end point of a reference anemometer cross bar 2 of the wind meter tower 3, a horizontal projection of the Beidou antenna B, C is consistent with a tower base center point connecting line direction and a cross bar direction, three Beidou antennas A, B, C respectively receive positioning signals of Beidou satellites to obtain longitude and latitude coordinates of the Beidou satellites, the three Beidou antennas A, B, C respectively communicate with the signal processor 4 in a wireless mode, the longitude and latitude coordinates of the Beidou satellites are transmitted to the signal processor 4, the signal processor 4 is connected with the display 5, and the display 5 displays processed results of the signal processor 4, namely, the horizontal angles between the main anemometer 1, the reference anemometer 2 and the north direction and the positive cross bar.

Specifically, the signal processor 4 calculates, according to the longitude and latitude coordinates of the three beidou antennas A, B, C, an included angle between a line between the horizontal projection of the two beidou antennas B, C and the beidou antenna a and the north direction (indicated by an arrow in fig. 2), as follows:

at the time of calculation, it is assumed that the north direction is 0 °;

setting: the longitude and latitude coordinates of the Beidou antenna A are as follows: alpha ₁ 、β ₁ ；

The longitude and latitude coordinates of the Beidou antenna B are as follows: alpha ₂ 、β ₂ ；

The longitude and latitude coordinates of the Beidou antenna C are as follows: alpha ₃ 、β ₃ ；

On the anemometer tower, the distance between the horizontal projection point of the outer end point of the cross rod and the central point of the tower foundation is only a few meters (generally 2-4 m), and the longitude and latitude coordinates of the outer end point of the cross rod can be completely horizontally projected and then are regarded as being on the same horizontal plane with the central point of the tower foundation, so that the included angle between the connecting line of the two points (namely the cross rod) and the north direction (0 degree) can be calculated by utilizing the longitude and latitude coordinates of the two points, and the calculation formula is as follows:

wherein a is an included angle between a transverse rod of the main anemoscope and the north direction, and b is an included angle between a transverse rod of the reference anemoscope and the north direction;

because the longitude and latitude measured by Beidou positioning appear in the form of degree, minute and second, and the calculation needs to be degree, the measured longitude and latitude need to be converted, namely the measured alpha needs to be converted ₁ 、β ₁ 、α ₂ 、β ₂ 、α ₃ 、β ₃ After being converted into degrees, the degrees are substituted into the formulas (1) and (2), so that the included angles between the transverse rod of the main anemoscope and the transverse rod of the reference anemoscope and the north direction can be calculated, and the accurate positioning of the transverse rod of the anemoscope is realized.

For example: longitude and latitude coordinates alpha of Beidou antenna A ₁ 、β ₁ The method comprises the following steps: 87 DEG 57 '2.81882' E, 43 DEG 27 '58.91048' N, converted to a degree format of 87.9507830056 DEG E, 43.4663640222 DEG N;

the longitude and latitude coordinates of the Beidou antenna B are as follows: alpha ₂ 、β ₂ The method comprises the following steps: 87 DEG 57 '2.86564' E, 43 DEG 27 '58.99685' N, converted to a degree format of 87.9507960111 DEG E, 43.4663880139 DEG N;

the longitude and latitude coordinates of the Beidou antenna C are as follows: alpha ₃ 、β ₃ The method comprises the following steps: 87 DEG 57 '2.85941' E, 43 DEG 27 '58.97863' N, converted to a degree format of 87.9507942806 DEG E, 43.4663829528 DEG N;

according to the formula, the included angle between the cross bar of the main anemoscope and the north direction is calculated as follows:

the included angle between the cross rod of the reference anemoscope and the north direction is as follows:

the above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

Claims (3)

1. The device for accurately positioning the cross rod of the anemoscope on the anemometer tower of the wind turbine generator is characterized by comprising three Beidou antennas A, B, C, a signal processor and a display; the big Dipper antenna A is arranged at the tower base center point of the anemometer tower, the big Dipper antenna B is arranged at the outer end point of the main anemoscope cross rod of the anemometer tower, the big Dipper antenna C is arranged at the outer end point of the reference anemoscope cross rod of the anemometer tower, the horizontal projection of the big Dipper antenna B, C is consistent with the connecting line direction of the tower base center point and the cross rod direction, the three big Dipper antennas A, B, C receive positioning signals of big Dipper satellites and respectively carry out wireless communication with a signal processor, longitude and latitude coordinates of each big Dipper satellite are transmitted to the signal processor, the signal processor is connected with a display, and the processed results of the signal processor are displayed through the display, namely the main anemoscope cross rod, the reference anemoscope cross rod and the included angle in the north direction.

2. The device for accurately positioning a cross rod of a anemometer on a wind tower of a wind turbine generator set according to claim 1, wherein the device is characterized in that: the wind measuring tower is of a triangular truss structure.

3. The device for accurately positioning a cross rod of a anemometer on a wind tower of a wind turbine generator set according to claim 1, wherein the device is characterized in that: the length of the main anemoscope cross bar and the reference anemoscope cross bar is 2-4 m.