CN112523974A - Wind turbine meteorological data measuring device - Google Patents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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Abstract
一种风力机气象数据测量装置，它包括针壳、探针、压力传感器、温度计、湿度计和大气压计，通过针壳与风力机的轮毂轴承连接，位于针壳内前端设置多孔结构的探针与多个压力传感器连接，压力传感器、温度计、湿度计和大气压计与主控系统电性连接，主控系统接收压力传感器、温度计、湿度计和大气压计的信号后，通过相应信号的变化来优化风力机的控制策略。克服了原风力机气象数据测量位于机舱顶部风流受到遮挡和干扰造成测量不准确的问题。具有结构简单，有效避免风力机叶片对测量造成的遮挡效应，针壳的整体长度也能避免轮毂对来流造成的阻塞效应，准确对风速进行测量，能够得到准确的轮毂位置处的大气密度的特点。
A wind turbine meteorological data measuring device, which includes a needle shell, a probe, a pressure sensor, a thermometer, a hygrometer and an atmospheric pressure gauge, and is connected with the hub bearing of the wind turbine through the needle shell, and a probe with a porous structure is arranged at the front end of the needle shell. Connect with multiple pressure sensors. The pressure sensor, thermometer, hygrometer and barometer are electrically connected to the main control system. After the main control system receives the signals from the pressure sensor, thermometer, hygrometer and barometer, it optimizes by changing the corresponding signals. Wind turbine control strategy. It overcomes the problem of inaccurate measurement caused by the occlusion and interference of the wind flow at the top of the nacelle when the meteorological data measurement of the original wind turbine is located. It has a simple structure, can effectively avoid the blocking effect caused by the wind turbine blades on the measurement, and the overall length of the needle shell can also avoid the blocking effect caused by the hub to the incoming flow, and can accurately measure the wind speed. Features.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and relates to a wind turbine meteorological data measuring device.
Background
In the field of wind power generation, with the coming of the fair era, how to improve the operating efficiency and the power generation capacity of a wind turbine becomes a content of important attention in the research of wind power technology. The measurement of meteorological data such as wind speed and wind direction is the basis for implementing a control strategy by the wind turbine master control system, and the accurate measurement of the meteorological data can effectively improve the control effect of the wind turbine master control system, so that the overall operation efficiency of the unit is improved.
At present, the measurement of meteorological data of a wind turbine is mainly the measurement of wind speed, and a common wind measuring instrument is usually installed on the top of a cabin of the wind turbine, as shown in fig. 1, and has a cup anemometer, a wind vane and the like. However, since the nacelle is located behind the impeller of the wind turbine, in the actual operation process of the wind turbine, the rotation of the front wind turbine blade can cause certain shielding and interference on the measurement of a rear wind measuring instrument, so that the wind speed measured by using the wind measuring method has certain deviation compared with the actual situation, and the deviation can further reduce the control effect of the main control system of the wind turbine.
In order to solve the problem, chinese patents CN 109813929 a (along with the chinese patent), CN 106980030A (liuxin, etc.) respectively propose a correction method and apparatus for wind speed measurement, however, the above patents are all improved for a wind measuring system at a nacelle, and due to the fact that the randomness of incoming wind is very high and the shielding effect of a wind turbine blade on a rear flow field cannot be completely eliminated, the above method still cannot completely solve the problem of inaccuracy of wind speed measurement of a nacelle wind measuring apparatus.
Chinese patents CN 108691727 a (shu shiqiang, etc.), CN 207662596U (billow), and CN 110145444 a (dun aidong, etc.) propose to place the wind measuring instrument in front of the hub to avoid the shielding effect of the wind turbine blades on the wind measuring instrument, and do not consider the blocking effect of the hub on the incoming flow of the wind turbine.
In addition, along with the gradual increase of the installed capacity of the wind turbine, the height of the wind turbine is gradually increased, so that the atmospheric density at the hub height of the wind turbine is obviously changed compared with the ground, and the atmospheric density is an important parameter of the incoming wind energy, so that the more accurate atmospheric density is another important guarantee for the efficient operation of the wind turbine.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wind turbine meteorological data measuring device which is simple in structure, a needle shell is connected with a hub bearing of a wind turbine, a probe with a porous structure is arranged at the front end in the needle shell and is connected with a plurality of pressure sensors, the pressure sensors, a thermometer, a hygrometer and an atmospheric pressure gauge are electrically connected with a main control system, the main control system receives signals of the pressure sensors, the thermometer, the hygrometer and the atmospheric pressure gauge and optimizes a control strategy of the wind turbine through the change of corresponding signals, the shielding effect of blades of the wind turbine on measurement is effectively avoided, the whole length of the needle shell can also avoid the blocking effect of a hub on incoming flow, the wind speed is accurately measured, and the accurate atmospheric density at the position of the hub can be obtained.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a wind turbine meteorological data measuring device comprises a needle shell, a probe, a pressure sensor, a thermometer, a hygrometer and an atmospheric pressure gauge; the probe, the pressure sensor, the thermometer, the hygrometer and the atmospheric pressure gauge are positioned in the needle shell, a pressure hole in the front end of the probe penetrates through the needle shell, and a sensing end of the pressure sensor is positioned in the pressure hole; and the pressure sensor, the thermometer, the hygrometer and the atmospheric pressure meter are electrically connected with a master control system of the wind turbine.
The needle shell is of a hollow cavity structure, the front end of the needle shell is of a streamline conical structure, and the probe is located at the front end of the needle shell.
The tail end of the needle shell is connected with a hub bearing of the wind turbine, and the needle shell is static when the hub rotates.
The length h of the needle shell is more than 0.6D, and D is the diameter of a blade root section of a blade of the wind turbine.
The probe is a rod-shaped body, five penetrating pressure holes are axially distributed and arranged, and the five pressure holes correspond to the five pressure sensors respectively.
One of the pressure holes is coaxial with the center of the probe, and the rest pressure holes are uniformly distributed around the axial line in an annular shape.
And the included angle between the pressure hole in the center of the probe and the pressure hole in the vertical direction is a pitch angle alpha, and the included angle between the pressure hole in the center of the probe and the pressure hole in the horizontal direction is a deflection angle beta.
The pressure corresponding to the five pressure sensors is p1,p2,p3,p4,p5Pitch coefficient of air flow
Coefficient of deflection angle
Coefficient of dynamic pressure
Wherein rho is the atmospheric density; u is the wind speed, p1,p2,p3,p4,p5Respectively corresponding to the upper vertical hole, the central hole, the lower vertical hole, the horizontal left hole and the horizontal right hole of the probe.
The thermometer, the hygrometer and the barometer are used for measuring the temperature, the water vapor pressure and the atmospheric pressure of the atmosphere respectively, and the density rho at the height of the hub of the wind turbine is f (p, t, e), wherein: f is the corresponding functional relationship; p is atmospheric pressure; e is atmospheric water vapor pressure; t is the atmospheric temperature.
And after the main control system receives signals of the pressure sensor, the thermometer, the hygrometer and the barometer, the control strategy of the wind turbine is optimized through the change of corresponding signals.
The utility model provides a wind energy conversion system meteorological data measuring device, it includes the needle shell, the probe, pressure sensor, the thermometer, the hygrometer and the barometer, be connected through the hub bearing of needle shell and wind energy conversion system, the probe that is located the needle shell inner front end and sets up porous structure is connected with a plurality of pressure sensor, the thermometer, the hygrometer and the barometer are connected with master control system electric connection, master control system receives pressure sensor, the thermometer, the hygrometer's signal back, optimize the control strategy of wind energy conversion system through the change of corresponding signal. The problem of inaccurate measurement caused by shielding and interference of wind current at the top of an engine room in the measurement of meteorological data of the original wind turbine is solved. The wind turbine blade shielding device has the characteristics of being simple in structure, effectively avoiding the shielding effect of the wind turbine blade on measurement, avoiding the blocking effect of the hub on incoming flow due to the whole length of the needle shell, accurately measuring the wind speed, and obtaining the accurate atmospheric density at the hub position.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of a prior art structure.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic view of the internal structure of the present invention.
FIG. 4 is a schematic structural diagram of a probe of the present invention.
Fig. 5 is a schematic cross-sectional view at a-a of fig. 4.
Fig. 6 is a schematic sectional view at B-B of fig. 4.
In the figure: the wind power generation device comprises a tower barrel 1, a cabin wind speed measuring instrument 2, a cabin 3, blades 4, a hub 5, a needle shell 6, a probe 7, a pressure sensor 8, a thermometer 9, a hygrometer 10, an atmospheric pressure gauge 11, a hub bearing 12 and a main control system 13.
Detailed Description
As shown in fig. 1 to 6, a wind turbine meteorological data measuring device comprises a needle housing 6, a probe 7, a pressure sensor 8, a thermometer 9, a hygrometer 10 and an atmospheric pressure gauge 11; the probe 7, the pressure sensor 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11 are positioned in the needle shell 6, a pressure hole in the front end of the probe 7 penetrates through the needle shell 6, and the sensing end of the pressure sensor 8 is positioned in the pressure hole; the pressure sensor 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure meter 11 are electrically connected with a main control system 13 of the wind turbine. Be connected through needle shell 6 and wind energy conversion system's wheel hub bearing 12, the probe 7 that is located needle shell 6 inner front end and sets up porous structure is connected with a plurality of pressure sensor 8, thermometer 9, hygrometer 10 and atmospheric pressure meter 11 and main control system 13 electric connection, main control system 13 receives pressure sensor 8, thermometer 9, behind hygrometer 10 and atmospheric pressure meter 11's the signal, the control strategy of wind energy conversion system is optimized through the change of corresponding signal, effectively avoid the sheltering from the effect that wind energy conversion system blade 4 caused to measuring, the whole length of needle shell 6 also can avoid the blocking effect that wheel hub 5 caused to the incoming flow, the accuracy is measured the wind speed, can obtain the atmospheric density of accurate wheel hub 5 position department.
In a preferred scheme, the needle shell 6 is a hollow cavity structure, the front end is a streamline conical structure, and the probe 7 is positioned at the front end in the needle shell 6. The structure is simple, when in use, the pressure sensor 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11 are positioned in the hollow needle shell 6, so that the direct exposure to the air is avoided, the service life is prolonged, and the measurement precision is improved; the needle shell 6 is of a streamline conical structure, and is beneficial to reducing the resistance of the incoming wind.
In a preferred scheme, the tail end of the needle shell 6 is connected with a hub bearing 12 of a wind turbine, and the needle shell 6 is static when the hub 5 rotates. Simple structure, during the use, needle shell 6 is connected with wheel hub bearing 12, and needle shell 6 is static when wheel hub 5 is rotatory, is favorable to the accurate wind current of measuring the incoming wind.
In a preferred embodiment, the length h of the needle casing 6 is greater than 0.6D, and D is the diameter of the root section of the wind turbine blade 4. Simple structure, during the use, the length of needle shell 6 is greater than 0.6 times 4 blade root section diameters of blade, is favorable to the probe 7 pressure port of needle shell 6 front end to avoid the disturbance of blade 4 surrounding wind current, avoids the choking effect of wheel hub 5 to the incoming flow.
In a preferred embodiment, the probe 7 is a rod-shaped body, and five pressure holes are axially distributed and provided to correspond to the five pressure sensors 8. Simple structure, during the use, the pressure hole that is located probe 7 front end is connected with pressure sensor 8 for measure incoming flow wind speed size and wind direction.
In a preferred scheme, one of the pressure holes is coaxial with the center of the probe 7, and the rest pressure holes are uniformly distributed around the axial line in an annular shape. Simple structure, during the use, one of five pressure ports on the probe 7 is located the axis of probe 7, and other four evenly distributed are around central pressure port, are favorable to accurate measurement incoming air parameter.
In a preferred scheme, an air flow included angle between the pressure hole in the center of the probe 7 and the pressure hole in the vertical direction is a pitch angle α, and an air flow included angle between the pressure hole in the center of the probe 7 and the pressure hole in the horizontal direction is a skew angle β. By setting the deflection angle and the pitch angle of the incoming airflow, parameter correction is facilitated through a formula.
In a preferred embodiment, the pressure corresponding to the five pressure sensors 8 is p1,p2,p3,p4,p5Pitch coefficient of air flow
Coefficient of deflection angle
Coefficient of dynamic pressure
Wherein rho is the atmospheric density; u is the wind speed, p1,p2,p3,p4,p5Respectively corresponding to the upper vertical hole, the central hole, the lower vertical hole, the horizontal left hole and the horizontal right hole of the probe 7. Such as well 1, well 2, well 3, well 4, well 5 in the figures. And the control strategy parameters of the wind turbine are provided by calculating the pitch angle, the deflection angle and the dynamic pressure coefficient of the airflow.
In a preferred embodiment, the thermometer 9, the hygrometer 10 and the barometric pressure gauge 11 respectively measure the temperature, the water vapor pressure and the atmospheric pressure of the atmosphere, and the density ρ ═ f (p, t, e) at the height of the hub 5 of the wind turbine is as follows: f is the corresponding functional relationship; p is atmospheric pressure; e is atmospheric water vapor pressure; t is the atmospheric temperature. The temperature of the atmosphere, the water vapor pressure and the atmospheric pressure are measured by the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11, and the density at the height of the hub 5 is calculated.
In a preferred scheme, after the main control system 13 receives signals of the pressure sensor 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11, the control strategy of the wind turbine is optimized through changes of the corresponding signals. When the wind turbine control system is used, the overall operation efficiency of the wind turbine is improved after the control strategy of the wind turbine is optimized.
The wind turbine meteorological data measuring device comprises a needle shell 6, a hub bearing 12 of a wind turbine, a probe 7 with a porous structure arranged at the front end in the needle shell 6 and connected with a plurality of pressure sensors 8, the pressure sensors 8, a thermometer 9, a hygrometer 10 and an atmospheric pressure gauge 11 are electrically connected with a main control system 13, the main control system 13 receives signals of the pressure sensors 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11, a control strategy of the wind turbine is optimized through changes of corresponding signals, a shielding effect of blades 4 of the wind turbine on measurement is effectively avoided, the whole length of the needle shell 6 can also avoid a blocking effect of the hub 5 on incoming current, wind speed is accurately measured, and accurate atmospheric density at the position of the hub 5 can be obtained.
When the pressure gauge is used, the pressure sensor 8, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11 are positioned in the hollow needle shell 6, so that the pressure sensor, the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11 are prevented from being directly exposed in the air, the service life is prolonged, and the measurement accuracy is improved; the needle shell 6 is of a streamline conical structure, and is beneficial to reducing the resistance of the incoming wind.
During the use, needle shell 6 is connected with wheel hub bearing 12, and needle shell 6 is static when wheel hub 5 is rotatory, is favorable to the accurate wind current of measuring the incoming wind.
When the probe shell is used, the length of the needle shell 6 is larger than 0.6 time of the diameter of the blade root section of the blade 4, so that the pressure hole of the probe 7 at the front end of the needle shell 6 is beneficial to avoiding the disturbance of the wind flow around the blade 4, and the blocking effect of the hub 5 on the incoming flow is avoided.
When the device is used, the pressure hole at the front end of the probe 7 is connected with the pressure sensor 8 and used for measuring the incoming flow speed and the incoming flow direction.
When the wind sensor is used, one of the five pressure holes in the probe 7 is located on the axis of the probe 7, and the other four pressure holes are uniformly distributed around the central pressure hole, so that the wind sensor is favorable for accurately measuring the wind parameters.
By setting the deflection angle and the pitch angle of the incoming airflow, parameter correction is facilitated through a formula.
And the control strategy parameters of the wind turbine are provided by calculating the pitch angle, the deflection angle and the dynamic pressure coefficient of the airflow.
The temperature of the atmosphere, the water vapor pressure and the atmospheric pressure are measured by the thermometer 9, the hygrometer 10 and the atmospheric pressure gauge 11, and the density at the height of the hub 5 is calculated.
When the wind turbine control system is used, the overall operation efficiency of the wind turbine is improved after the control strategy of the wind turbine is optimized.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. A wind turbine meteorological data measuring device is characterized in that: the device comprises a needle shell (6), a probe (7), a pressure sensor (8), a thermometer (9), a hygrometer (10) and an atmospheric pressure meter (11); the probe (7), the pressure sensor (8), the thermometer (9), the hygrometer (10) and the barometer (11) are positioned in the needle shell (6), a pressure hole in the front end of the probe (7) penetrates through the needle shell (6), and the sensing end of the pressure sensor (8) is positioned in the pressure hole; the pressure sensor (8), the thermometer (9), the hygrometer (10) and the atmospheric pressure meter (11) are electrically connected with a main control system (13) of the wind turbine.
2. The wind turbine meteorological data measuring device of claim 1, wherein: the needle shell (6) is of a hollow cavity structure, the front end of the needle shell is of a streamline conical structure, and the probe (7) is located at the front end of the needle shell (6).
3. The wind turbine meteorological data measuring device of claim 2, wherein: the tail end of the needle shell (6) is connected with a hub bearing (12) of the wind turbine, and the needle shell (6) is static when the hub (5) rotates.
4. The wind turbine meteorological data measuring device of claim 1, wherein: the length h of the needle shell (6) is more than 0.6D, and D is the diameter of a blade root section of a blade (4) of the wind turbine.
5. The wind turbine meteorological data measuring device of claim 1, wherein: the probe (7) is a rod-shaped body, five penetrating pressure holes are axially distributed and arranged, and the five pressure holes correspond to the five pressure sensors (8) respectively.
6. The wind turbine meteorological data measuring device of claim 5, wherein: one of the pressure holes and the center of the probe (7) are on the same axis, and the rest pressure holes are uniformly distributed around the axis in an annular shape.
7. The wind turbine meteorological data measuring device of claim 6, wherein: and the included angle between the pressure hole in the center of the probe (7) and the air flow of the pressure hole in the vertical direction is a pitch angle alpha, and the included angle between the pressure hole in the center of the probe (7) and the air flow of the pressure hole in the horizontal direction is a deflection angle beta.
8. The wind turbine meteorological data measuring device of claim 5, wherein: the pressure corresponding to the five pressure sensors (8) is p1,p2,p3,p4,p5Pitch coefficient of air flow
Coefficient of deflection angle
Coefficient of dynamic pressure
Wherein rho is the atmospheric density; u is the wind speed, p1,p2,p3,p4,p5Respectively corresponding to an upper vertical hole, a central hole, a lower vertical hole, a horizontal left hole and a horizontal right hole of the probe (7).
9. The wind turbine meteorological data measuring device of claim 1, wherein: the thermometer (9), the hygrometer (10) and the barometer (11) respectively measure the temperature, the water vapor pressure and the atmospheric pressure of the atmosphere, and the density rho at the height of the hub (5) of the wind turbine is f (p, t, e), wherein: f is the corresponding functional relationship; p is atmospheric pressure; e is atmospheric water vapor pressure; t is the atmospheric temperature.
10. The wind turbine meteorological data measuring device of any one of claims 1 to 9, wherein: and after the master control system (13) receives signals of the pressure sensor (8), the thermometer (9), the hygrometer (10) and the barometer (11), the control strategy of the wind turbine is optimized through the change of corresponding signals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011505820.8A CN112523974A (en) | 2020-12-18 | 2020-12-18 | Wind turbine meteorological data measuring device |
| PCT/CN2021/117082 WO2022127209A1 (en) | 2020-12-18 | 2021-09-08 | Wind turbine meteorological data measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011505820.8A CN112523974A (en) | 2020-12-18 | 2020-12-18 | Wind turbine meteorological data measuring device |
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| CN112523974A true CN112523974A (en) | 2021-03-19 |
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| CN202011505820.8A Pending CN112523974A (en) | 2020-12-18 | 2020-12-18 | Wind turbine meteorological data measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022127209A1 (en) * | 2020-12-18 | 2022-06-23 | 中国长江三峡集团有限公司 | Wind turbine meteorological data measuring device |
| CN115220065A (en) * | 2022-07-15 | 2022-10-21 | 华能通渭风电有限责任公司 | A method, device, equipment and storage medium for obtaining wind speed of wind turbine incoming flow |
| CN118346535A (en) * | 2024-04-22 | 2024-07-16 | 华能(浙江)能源开发有限公司清洁能源分公司 | A barometer for monitoring the cabin of a wind turbine generator set |
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