Shallow wind measuring device for avoiding tower shadow effect

Abstract

The utility model provides a shallow wind measuring device for avoiding a tower shadow effect, and the device comprises a wind measuring tower, a main wind measuring sensor, an auxiliary wind measuring sensor, and a data collector. The main wind measurement sensor is mounted on a first cross arm on the prevailing wind windward side of the wind measurement tower; the auxiliary wind measurement sensor is installed on a second cross arm, opposite to the prevailing wind, of the wind measurement tower. The data collector is connected with the main wind measurement sensor and the auxiliary wind measurement sensor and used for receiving and processing real-time wind direction and wind speed data from the main wind measurement sensor and the auxiliary wind measurement sensor, selecting data of one sensor according to wind direction information to record, selecting the main wind measurement sensor when the wind is blown from the main wind measurement sensor, and selecting the auxiliary wind measurement sensor when the wind is blown from the auxiliary wind measurement sensor. And when the wind is blown from the auxiliary wind measurement sensor, the auxiliary wind measurement sensor is selected. Through the innovative sensor layout and data processing mechanism, the tower shadow effect is automatically avoided, and the accuracy and reliability of wind speed measurement are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of wind measurement devices, and particularly to a shallow - layer wind measurement device for avoiding the tower shadow effect. Background Art

[0002] In wind energy resource assessment and wind farm planning and operation, accurately measuring the wind speed and direction of shallow - layer wind is crucial. As the main measurement device, the wind measurement tower plays a core role in wind resource monitoring. However, while the wind measurement tower performs its functions, it also introduces a non - negligible error source - the tower shadow effect. The tower shadow effect is a phenomenon in which the wind speed in the downstream area of the tower body decays and the turbulence intensifies due to the obstruction of the air flow by the wind measurement tower itself. This phenomenon directly affects the accuracy of wind speed measurement and may mislead the design, construction, and operation decisions of wind farms.

[0003] Currently, the industry mainly adopts an empirical correction method based on long - term observation data for the impact of the tower shadow effect. This method collects a large amount of measured data, analyzes the performance laws of the tower shadow effect under different conditions, and then constructs a correction algorithm to reduce measurement errors. Although this method improves the accuracy of wind speed measurement to a certain extent, there are still many limitations and deficiencies:

[0004] (1) Limitations of turbulence correction: The formation mechanism of turbulence in the tower shadow effect is complex and variable, and its intensity and distribution are affected by many factors, such as the shape and size of the tower body, the surrounding topography and geomorphology, and meteorological conditions. Therefore, in actual operation, it is difficult to accurately predict and correct the specific impact of turbulence on wind speed measurement, resulting in limited correction effects.

[0005] (2) Specificity of correction algorithms: The structures, sizes, and geographical locations of different wind measurement towers vary significantly, which requires the correction algorithm to be customized for specific wind measurement towers. However, due to the uniqueness of each wind measurement tower, there is almost no generally applicable correction algorithm, which increases the difficulty and cost of algorithm development and application.

[0006] (3) Sensitivity to environmental factors: Even at the same location, different meteorological conditions (such as temperature, pressure, radiation, etc.) may cause significant changes in the tower shadow effect. Therefore, the correction algorithm needs to be able to dynamically adapt to various environmental factor changes, while existing methods often fail to do so, thus limiting their application effects in complex environments. Utility Model Content

[0007] The purpose of this application is to provide a more effective, flexible, and adaptable shallow - layer wind measurement device to avoid the adverse effects of the tower shadow effect on wind speed measurement.

[0008] To achieve the above - mentioned purpose, this application provides the following technical solutions:

[0009] A shallow wind measurement device for avoiding the tower shadow effect, comprising an anemometry tower, a main wind measurement sensor, a secondary wind measurement sensor and a data collector, wherein;

[0010] The main wind measurement sensor is installed on the first cross arm on the windward side of the prevailing wind of the anemometry tower;

[0011] The secondary wind measurement sensor is installed on the second cross arm against the prevailing wind of the anemometry tower;

[0012] The data collector is respectively connected to the main wind measurement sensor and the secondary wind measurement sensor, and is used for receiving and processing the real-time wind direction and wind speed data from both, and selecting the data of one of the sensors for recording according to the wind direction information. When the wind direction is blowing from the main wind measurement sensor, the main wind measurement sensor is selected, and when the wind direction is blowing from the secondary wind measurement sensor, the secondary wind measurement sensor is selected.

[0013] In one embodiment, the main wind measurement sensor and the secondary wind measurement sensor are located outside the anemometry tower.

[0014] In one embodiment, the distance between the main wind measurement sensor and the secondary wind measurement sensor located outside the anemometry tower is 1 m to 2 m.

[0015] In one embodiment, the main wind measurement sensor is installed on the first cross arm through a first mounting seat, and the secondary wind measurement sensor is installed on the second cross arm through a second mounting seat.

[0016] In one embodiment, temperature and humidity sensors are respectively installed on the first cross arm and the second cross arm.

[0017] In one embodiment, junction boxes are respectively installed on the first cross arm and the second cross arm, and a protective cover is arranged outside the junction box.

[0018] In one embodiment, the main wind measurement sensor and the secondary wind measurement sensor are ultrasonic wind sensors.

[0019] In one embodiment, the first cross arm and the second cross arm are circular cross arms.

[0020] The beneficial effects of the present application are as follows:

[0021] (1) By respectively installing the main wind measurement sensor and the secondary wind measurement sensor on both sides of the anemometry tower, and automatically selecting the sensor data on the upwind side (i.e., not affected by the tower shadow effect) for recording according to the real-time wind direction, the present invention effectively avoids the negative impact of the tower shadow effect on wind speed measurement. This design enables the measurement device to obtain data as close as possible to the natural wind conditions regardless of how the wind direction changes, thereby significantly improving the accuracy and reliability of wind speed measurement.

[0022] (2) The device of the present invention does not rely on a specific correction algorithm or model, but realizes the avoidance of the tower shadow effect through the optimization of the physical layout. Therefore, it is not restricted by the specific structure, size, and geographical location of the anemometer tower, nor is it directly affected by environmental factors such as temperature, air pressure, and radiation, and has stronger environmental adaptability and broad application prospects.

[0023] (3) In traditional methods, in order to reduce the influence of the tower shadow effect, it is necessary to frequently adjust the correction algorithm or perform complex data processing. However, the present invention realizes the automatic avoidance of the tower shadow effect through a simple sensor layout and an automated data selection mechanism, greatly simplifying the operation process and reducing the requirements for the professional skills of operators. At the same time, due to the reduction of unnecessary correction steps and calculations, the cost of data processing and maintenance is also reduced. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of a shallow wind measurement device for avoiding the tower shadow effect provided by an embodiment of the present application;

[0025] Figure 2 It is a structural schematic diagram of a shallow wind measurement device for avoiding the tower shadow effect provided by an embodiment of the present application;

[0026] Figure 3 It is a partial structural schematic diagram of a shallow wind measurement device for avoiding the tower shadow effect provided by an embodiment of the present application;

[0027] Description of the Reference Numerals:

[0028] A, Prevailing wind; B, Wind against the prevailing wind;

[0029] 1, Anemometer tower; 2, Main anemometry sensor; 3, Sub - anemometry sensor; 4, Data collector; 5, First cross - arm; 6, Second cross - arm; 7, First mounting base; 8, Second mounting base; 9, Temperature and humidity sensor; 10, Louver cover; 11, Junction box; Detailed Embodiments

[0030] The terms used in the embodiments of the present application are only for explaining the specific embodiments of the present application and are not intended to limit the present application. The following will describe the embodiments of the present application in detail with reference to the drawings.

[0031] As Figure 1 shown, first conduct a field investigation of historical anemometry data to find the local prevailing wind. The prevailing wind is related to local geographical location, topography, etc., and the prevailing wind direction can be statistically analyzed from the local historical anemometry data.

[0032] As Figure 2As shown in the figure, a shallow wind measurement device for avoiding the tower shadow effect includes a wind measurement tower 1, a main wind measurement sensor 2, a secondary wind measurement sensor 3, and a data collector 4, where;

[0033] Wind measurement tower 1: As the basic support structure of the entire measurement device, the wind measurement tower 1 is firmly installed on the ground and has a certain height to ensure that the sensor can be in a suitable wind field.

[0034] Main wind measurement sensor 2: In order to accurately capture the wind speed and wind direction information of the prevailing wind direction, we install the main wind measurement sensor 2 on the first cross-arm 5 on the windward side of the prevailing wind of the wind measurement tower 1, and specifically install it at the end position of the first cross-arm 5. Such a layout can minimize the interference of the tower body itself on the measurement results of the sensor and ensure the accuracy of the measurement data.

[0035] Secondary wind measurement sensor 3: In order to cope with the tower shadow effect that may occur when the wind direction changes, we also install a secondary wind measurement sensor 3 on the second cross-arm 6 against the prevailing wind of the wind measurement tower 1, and also install it at the end position of the second cross-arm 6. In this way, when the wind direction does not directly face the main wind measurement sensor 2, the secondary wind measurement sensor 3 can take over the work of the main wind measurement sensor 2 and continue to provide accurate wind speed and wind direction data.

[0036] Data collector 4: The data collector 4 is one of the core components of the entire measurement device. It is connected to the main wind measurement sensor 2 and the secondary wind measurement sensor 3 by wired or wireless means respectively. The data collector 4 is responsible for receiving the wind speed and wind direction data from the two sensors in real time and automatically selecting the data of one of the sensors for recording according to the wind direction information. Specifically, when the wind direction is blowing from the main wind measurement sensor 2, the data collector 4 selects the data of the main wind measurement sensor 2 for recording; when the wind direction is blowing from the secondary wind measurement sensor 3, the data of the secondary wind measurement sensor 3 is selected for recording.

[0037] Working principle

[0038] During the operation of the device, the main wind measurement sensor 2 and the secondary wind measurement sensor 3 continuously monitor and transmit real-time wind speed and wind direction data to the data collector 4. The data collector 4 intelligently judges the current wind direction according to the received wind direction information and automatically selects the corresponding sensor data for recording. In this way, we have successfully avoided the influence of the tower shadow effect on the wind speed measurement and improved the accuracy and reliability of the measurement.

[0039] Such as Figure 3As shown, in this embodiment, we further refined the specific installation positions and their spacing outside the anemometer tower 1 for the main anemometer sensor 2 and the secondary anemometer sensor 3. To ensure that the sensors can fully capture the natural wind conditions without being disturbed by the tower body and to avoid mutual influence between the two, we installed the main anemometer sensor 2 and the secondary anemometer sensor 3 at two different positions outside the anemometer tower 1, and the distance H between them and the anemometer tower 1 is set between 1 m and 2 m. Such a spacing design not only ensures the independence of measurement but also facilitates the signal reception and processing of the data collector 4.

[0040] As Figure 2 shown, to enhance the installation stability of the main anemometer sensor 2 and the secondary anemometer sensor 3 on the cross arms of the anemometer tower 1, this embodiment introduces the concept of the first mounting base 7 and the second mounting base 8. The main anemometer sensor 2 is firmly installed on the first cross arm 5 through the specially designed first mounting base 7, while the secondary anemometer sensor 3 is installed on the second cross arm 6 through the second mounting base 8. These mounting bases not only provide stable support but also facilitate the maintenance and replacement of the sensors.

[0041] As Figure 2 shown, to improve the comprehensive performance of the measuring device, this embodiment installs temperature and humidity sensors 9 on the first cross arm 5 and the second cross arm 6 respectively. These temperature and humidity sensors 9 can monitor and record the temperature and humidity data of the environment around the anemometer tower 1 in real time, providing more comprehensive environmental parameter support for the operation of the wind farm. At the same time, these data can also be used for subsequent wind speed data correction to further improve the measurement accuracy.

[0042] As Figure 3 shown, in this embodiment, we further optimized the installation of the temperature and humidity sensors 9, especially by adding a louver cover 10 outside them. The design of the louver cover 10 can not only effectively prevent external environmental factors such as rain and dust from directly contacting the temperature and humidity sensors 9, reducing measurement errors caused by pollution, but also avoid direct sunlight from damaging the internal components of the sensors while ensuring air circulation. In addition, the material and structure design of the louver cover 10 also fully consider the wind resistance factor to ensure that its impact on wind speed measurement is minimized.

[0043] As Figure 3 shown, to ensure the safety and stability of the internal lines of the measuring device, this embodiment installs junction boxes 11 on the first cross arm 5 and the second cross arm 6 respectively, and protective covers are set outside the junction boxes 11. These protective covers can effectively prevent external factors such as rain and dust from damaging the lines, ensuring the continuity and reliability of data transmission. At the same time, the design of the junction boxes 11 also facilitates technicians to carry out line inspection and maintenance work.

[0044] In this embodiment, the main wind sensor 2 and the auxiliary wind sensor 3 are ultrasonic wind sensors. Ultrasonic wind sensors have been widely used in the field of wind speed measurement due to their advantages such as high precision, high stability, and strong anti-interference ability. Using an ultrasonic wind sensor as the measuring element of the present invention can further improve the overall performance of the measuring device.

[0045] As Figure 3 shown, in order to reduce wind resistance and improve measurement accuracy, in this embodiment, the first cross arm 5 and the second cross arm 6 are designed to be circular cross arm shapes. The circular cross arm not only has a better streamline design, which can reduce the influence of wind resistance on the measurement results, but also can reduce the interference of the tower shadow effect on wind speed measurement to a certain extent. Such a design enables the measuring device to maintain a high measurement accuracy under complex wind conditions.

[0046] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0047] The device or element referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise precisely and specifically defined.

[0048] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than limiting them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A shallow wind measurement device for avoiding the tower shadow effect, characterized in that: It includes an anemometer tower, a main anemometry sensor, a secondary anemometry sensor and a data collector, wherein; The main anemometry sensor is installed on the first cross arm on the windward side of the prevailing wind of the anemometer tower; The secondary anemometry sensor is installed on the second cross arm against the prevailing wind of the anemometer tower; The data collector is respectively connected to the main anemometry sensor and the secondary anemometry sensor, and is used to receive and process the real-time wind direction and wind speed data from both, and select the data of one of the sensors for recording according to the wind direction information. When the wind direction blows from the main anemometry sensor, the main anemometry sensor is selected, and when the wind direction blows from the secondary anemometry sensor, the secondary anemometry sensor is selected.

2. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, wherein: The main anemometry sensor and the secondary anemometry sensor are located outside the anemometer tower.

3. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, characterized in that: The distance between the main anemometry sensor and the secondary anemometry sensor outside the anemometer tower is 1m to 2m.

4. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, wherein: The main anemometry sensor is installed on the first cross arm through the first mounting seat, and the secondary anemometry sensor is installed on the second cross arm through the second mounting seat.

5. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, characterized in that: Temperature and humidity sensors are respectively installed on the first cross arm and the second cross arm.

6. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, characterized in that: Terminal boxes are respectively installed on the first cross arm and the second cross arm, and a protective cover is arranged outside the terminal box.

7. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, characterized in that: The main anemometry sensor and the secondary anemometry sensor are ultrasonic anemometry sensors.

8. The shallow wind measurement device for avoiding the tower shadow effect according to claim 1, characterized in that: The first cross arm and the second cross arm are circular cross arms.

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