JP2020193605A - Method for measuring wind state for wind power generation device and wind power generation device - Google Patents

Abstract

To provide a wind power generation device that can accurately measure a wind state without an increase in cost more than necessary and is applicable to variable regions, and to provide a method for measuring a wind state.SOLUTION: A method for measuring a wind state includes the steps of: acquiring multiple wind direction data using an anemoscope; and reading yaw errors corresponding to the acquired multiple wind direction data from a data base in which relationships between the wind direction data and yaw errors are preliminarily stored.SELECTED DRAWING: Figure 6

Description

The present invention relates to the configuration and control of the wind power generation device, and more particularly to a wind condition measuring method for measuring the wind direction flowing into the wind power generation device.

As a control method for a wind power generation device that receives wind to generate power, a method is known in which when the wind direction changes, the rotor rotating surface of the wind power generation device is controlled to face the wind direction by yaw control. In order to improve the accuracy of this yaw control, it is necessary to correctly measure the yaw error, which is the deviation between the rotation axis direction and the wind direction of the rotor of the wind power generator.

As a method for measuring the yaw error, an anemometer installed in a wind power generator is generally used. However, since the anemometer is installed in the wind power generation device, there is a problem that the changed wind direction is measured under the influence of the nacelle and the rotor of the wind power generation device, and the measurement accuracy is lowered.

In order to deal with such problems, a method of measuring the wind condition on the wind side that is not affected by the wind power generator using a laser anemometer, a method of using the generated power of the wind power generator, etc. have been proposed. There is.

For example, in Patent Document 1, the wind power generator includes a laser anemometer attached to or near the wind power generator. Using a laser anemometer, observe the wind direction and speed of the wind coming toward the wind power generator in advance, and based on the observation results, predict and control the yaw angle and pitch angle of the wind power generator to control the wind power generator. Highly efficient operation control of including wind power generation systems. In addition, by equipping an output smoothing device connected to the wind power generator, the power input / output amount of the output smoothing device is predicted and controlled based on the predicted output value of the wind power generator to smooth the output of the entire wind power generation system. It is stated that.

Further, in Patent Document 2, the data storage unit indicates the power generation output P during operation of the anemometer, the inflow wind speed Ws estimated based on the wind speed measured by the anemometer, and the wind direction θw measured by the anemometer. A data set of anemometers, which is the difference between the anemometer and the anemometer, is sequentially accumulated, and the statistical analysis of the accumulated data is performed by the analysis unit to obtain a distribution curve for the anemometer of the power generation output at each inflow wind speed. The peak wind direction deviation is set as the correction value θd of the anemometer, the correction value of the anemometer for each inflow wind speed is stored in the wind direction correction table, and the operation control unit sets the wind direction Vw by the anemometer to the wind direction meter for each inflow wind speed Ws. It is described that the power generation is controlled by correcting with the correction value θd of the above and using the corrected wind direction as a control parameter.

Japanese Unexamined Patent Publication No. 2004-301116 Japanese Unexamined Patent Publication No. 2008-291786

However, in the wind condition measurement method of the wind power generation device of Patent Document 1, a laser type anemometer is used for wind condition measurement, but this laser type anemometer is expensive and all wind power generation during operation. Installation on the device is difficult from a cost standpoint.

Further, in the wind condition measurement method of the wind power generation device of Patent Document 2 above, the evaluation is made based on the power generation output of the wind power generation device, and when the power generation output changes due to a change in upwind wind or turbulent flow intensity in a mountainous area or the like. There is a problem that the measurement accuracy is lowered.

Therefore, an object of the present invention is to provide a wind power generation device and a wind condition measurement method that can measure wind conditions with high accuracy without increasing the cost more than necessary and can be applied in various regions. is there.

In order to solve the above problems, the present invention acquires a plurality of wind direction data by an anemometer, and obtains a yaw error corresponding to the plurality of acquired wind direction data from a database in which the relationship between the wind direction data and the yaw error is stored in advance. It is characterized by reading.

Further, the present invention is acquired by the wind direction meter, the measurement value acquisition unit that acquires a plurality of wind direction data from the wind direction meter, the storage unit that stores the relationship between the wind direction data and the yaw error in advance, and the measurement value acquisition unit. A yaw error calculation unit that reads yaw errors corresponding to a plurality of wind direction data from the storage unit is provided, and the yaw angle is controlled based on the yaw error read by the yaw error calculation unit.

According to the present invention, it is possible to realize highly accurate wind condition measurement without increasing the cost more than necessary, and to realize a wind power generation device and a wind condition measurement method applicable to various regions.

As a result, the amount of power generated by the wind power generation device can be improved.

Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is an overall schematic block diagram which shows the wind power generation apparatus of Example 1. FIG. It is a schematic diagram which shows an example of the relationship between a wind power generation device and a wind direction. It is a schematic diagram which shows the anemometer installation position in Example 1. FIG. It is a schematic diagram which shows the relationship between the inflow wind direction to the wind power generation apparatus in Example 1 and the measurement result of an anemometer. It is a schematic diagram which shows the relationship between the inflow wind direction to the wind power generation apparatus in Example 1 and the measurement result of an anemometer. It is a functional block diagram in the wind power generation apparatus of Example 1. FIG. It is a schematic diagram which shows the anemometer installation position in Example 2. It is a schematic diagram which shows the relationship between the inflow wind direction with respect to the wind power generation apparatus in Example 2 and the measurement result of an anemometer. It is a schematic diagram which shows the relationship between the inflow wind direction with respect to the wind power generation apparatus in Example 2 and the measurement result of an anemometer. It is a functional block diagram in the wind power generation device of Example 2. It is a functional block diagram in the wind power generation device of Example 3. It is a functional block diagram in the wind power generation device of Example 4. It is a functional block diagram in the wind power generation apparatus of Example 5. It is a schematic diagram which shows the relationship between the wind power generation apparatus and the wind condition measuring apparatus in Example 6 and Example 7.

Hereinafter, examples of the present invention will be described with reference to the drawings. In each drawing, the same components are designated by the same reference numerals, and the detailed description of overlapping portions will be omitted.

In this specification, as the wind power generation device according to the embodiment of the present invention, a downwind type wind power generation device will be described as an example, but the same can be applied to an upwind type wind power generation device. Further, an example in which the rotor is composed of three blades and a hub is shown, but the present invention is not limited to this, and the rotor may be composed of a hub and at least one blade. The wind power generation device according to the embodiment of the present invention can be installed at any place on the ocean, in a mountainous area, or in a plain area.

The wind power generation device and the wind condition measurement method of the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is an overall schematic configuration diagram showing a wind power generation device of this embodiment. As shown in FIG. 1, the wind power generator 2 rotatably supports a blade 23 that rotates in response to wind, a hub 22 that supports the blade 23, a nacelle 21 that rotatably supports the hub 22, and a nacelle 21. The tower 20 is provided.

Inside the nacelle 21, a spindle 25 connected to the hub 22 and rotating together with the hub 22, a speed increasing machine 27 connected to the spindle 25 to increase the rotation speed, and a rotor at a rotation speed increased by the speed increasing machine 27. The generator 28 is provided to rotate and operate the generator.

Further, the direction of installation of the blade 23 with respect to the hub 22 is referred to as a pitch angle, and the wind power generation device 2 includes this pitch angle, that is, a pitch angle control device 34 that controls the direction of the blade 23. The portion that transmits the rotational energy of the blade 23 to the generator 28 is called a power transmission unit, and in this embodiment, the spindle 25 and the speed increaser 27 are included in the power transmission unit. The speed increaser 27 and the generator 28 are held on the main frame 29, and the generator 28 has a generator control device 35 that controls the movement thereof.

Further, the rotor 24 is composed of the blade 23 and the hub 22. As shown in FIG. 1, a power converter 30 that converts the frequency of electric power, a switch and a transformer for switching that switches and switches current (not shown), and a control device 31 are arranged inside the tower 20. Has been done. In FIG. 1, the power converter 30 and the control device 31 are installed at the bottom of the tower 20, but the installation location of these devices is not limited to the bottom of the tower, and other devices can be installed inside the wind power generator 2. It may be installed in a place.

Further, an anemometer 32 for measuring wind direction data and wind speed data is installed on the upper surface of the nacelle 21. As the control device 31, for example, a control panel or SCADA (Supervisory Control And Data Acquisition) or the like is used.

Further, the direction of the nacelle 21 is referred to as a yaw angle, and the wind power generator 2 includes a yaw angle control device 33 that controls the direction of the nacelle 21, that is, the direction of the rotating surface of the rotor 24. As shown in FIG. 1, the yaw angle control device 33 is arranged between the bottom surface of the nacelle 21 and the tip end portion of the tower 20, and is composed of, for example, at least an actuator and a motor for driving the actuator (not shown). Based on the yaw angle control command output from the control device 31 via the signal line, the nacelle 21 rotates to obtain the desired yaw angle by rotating the motor constituting the yaw angle control device 33 and shifting the actuator by a desired amount. Rotate.

FIG. 2 is a schematic diagram showing an example of the relationship between the wind power generator and the wind direction. The deviation between the nacelle direction 51 and the wind direction 53 corresponding to the direction of the wind power generator 2 is called a yaw error 55. Generally, the nacelle direction 51 is controlled by the yaw angle control device 33 so that the yaw error 55 is reduced.

In the present invention, an anemometer installed outside the nacelle is used as a method for measuring this yaw error. As the anemometer used at this time, an arrow vane type anemometer based on the weathercock effect may be used, or an ultrasonic anemometer may be used.

FIG. 3 shows the installation location of the anemometer in this embodiment. In this embodiment, a right anemometer 32a and a left anemometer 32b are installed above the nacelle. At this time, the right anemometer 32a and the left anemometer 32b measure the anemometer at the position where the anemometer is installed, and may show a measurement result different from the wind direction before the inflow of the wind power generator due to the influence of the nacelle and the rotor.

FIG. 4 shows the relationship between the wind direction when the yaw error is very small and the wind direction at the anemometer position in FIG. The right anemometer 56a measured by the right anemometer 32a and the left anemometer 56b measured by the left anemometer 32b show different measurement results from the wind direction 53 before the inflow of the wind turbine due to the influence of the nacelle and rotor of the wind turbine. Specifically, since the nacelle or rotor acts as a resistor that dams the wind against the wind, it becomes a wind flow field that avoids the nacelle or rotor.

FIG. 5 shows a relationship diagram between the wind direction 53 when a yaw error occurs and the wind direction at the anemometer position in FIG. The right anemometer 56a measured by the right anemometer 32a and the left anemometer 56b measured by the left anemometer 32b are the same as the wind direction 53 before the inflow of the wind power generator due to the influence of the nacelle and rotor of the wind power generator as in the case of FIG. Shows different measurement results. Specifically, the right wind direction 56a is a wind direction along the nacelle due to the influence of the nacelle, while the left wind direction 56b is a wind direction having a larger yaw error in order to avoid the rotor.

As shown in FIGS. 4 and 5, the wind direction 53 and the wind directions 56a and 56b measured by the anemometer on the nacelle are considered to indicate different wind directions. Therefore, it is necessary to calculate the correct wind direction from the measurement result of the anemometer and derive the yaw error. Since the relationship between the wind direction 53 and the wind directions 56a and 56b measured by the anemometer on the nacelle changes depending on the shape of the nacelle and the like, the relationship may be different from those in FIGS. 4 and 5.

FIG. 6 shows a functional block diagram of a wind condition measuring (observation) device that executes the wind condition measuring method of this embodiment. The measuring device 37 includes a storage unit 311, a measured value acquisition unit 313, and a yaw error calculation unit 315, which are connected to each other so as to be accessible by an internal bus 319.

The yaw error calculation unit 315 is realized by, for example, a processor such as a CPU (Central Processing Unit) (not shown), a ROM for storing various programs, a RAM for temporarily storing data in the calculation process, and a storage device such as an external storage device. At the same time, a processor such as a CPU reads and executes various programs stored in the ROM, and stores the calculation result, which is the execution result, in the RAM or an external storage device. Although the explanation is divided into each functional block for easy understanding, a configuration in which a desired functional block is integrated may be used.

The measured value acquisition unit 313 acquires the wind direction data measured by the right anemometer 32a and the left anemometer 32b via the input I / F317a, the input I / F317b, and the internal bus 319, and obtains, for example, A / D conversion processing. , Smoothing process (noise removal), normalization process, etc.

At least, the relationship between the yaw error in the wind power generation device 2 and the right wind direction 56a measured by the right anemometer 32a and the left wind direction 56b measured by the left anemometer 32b is stored in the storage unit 311 in advance.

The yaw error calculation unit 315 accesses the storage unit 311 via the internal bus 319, and reads out the yaw error based on the wind direction flowing into the wind power generation device 2 from the storage unit 311. The obtained yaw error is output to the yaw angle control device 33 through the output I / F 318.

As described above, in the wind condition measurement method of the wind power generator of the present embodiment, a plurality of wind direction data are acquired from the anemometer, and the relationship between the wind direction data and the yaw error is stored in advance from the database (storage unit 311). Read the yaw error corresponding to the acquired multiple wind direction data.

According to this embodiment, it is possible to measure the wind condition with high accuracy without increasing the cost more than necessary, and it is possible to provide a wind condition measurement method for a wind power generator that can be applied in various regions. It becomes.

Specifically, by using the measurement results of the two left and right anemometers (right anemometer 32a, left anemometer 32b) installed on the upper part of the nacelle 21 and the data stored in the storage unit 311, a new measuring device is used. It is possible to measure the yaw error with higher accuracy without installing.

Further, the wind power generation device 2 of the present embodiment includes a wind direction meter (32a, 32b), a measurement value acquisition unit 313 that acquires a plurality of wind direction data (56a, 56b) from the wind direction meter (32a, 32b), and wind direction data. It is provided with a storage unit 311 that stores the relationship between the and yaw error in advance, and a yaw error calculation unit 315 that reads the yaw error corresponding to a plurality of wind direction data (56a, 56b) acquired by the measurement value acquisition unit 313 from the storage unit 311. The yaw angle control device 33 is controlled (corrected) based on the yaw error read by the yaw error calculation unit 315.

Further, a plurality of anemometers (32a, 32b) are arranged outside the nacelle 21 of the wind power generation device 2.

Further, at least two anemometers (32a, 32b) are arranged on the left and right sides of the nacelle 21 with respect to the wind direction at the upper part of the nacelle 21 of the wind power generation device 2, and at substantially the same height from the upper part of the nacelle 21. Have been placed.

As a result, the yaw angle control device 33 enables highly accurate yaw angle control (correction), and the amount of power generated by the wind power generation device can be improved.

The wind power generation device and the wind condition measurement method of the second embodiment will be described with reference to FIGS. 7 to 10. A detailed description of the points overlapping with the first embodiment will be omitted.

A feature of this embodiment is that the anemometers installed on the nacelle are installed at different heights from the upper surface of the nacelle.

FIG. 7 shows the installation position of the anemometer in this embodiment. In this embodiment, a lower anemometer 32c and an upper anemometer 32d are installed above the nacelle. At this time, the lower anemometer 32c and the upper anemometer 32d installed on the nacelle measure the anemometer at the position where the anemometer is installed, and it is considered that the measurement result is different from the wind direction 53 before the inflow of the wind power generator.

FIG. 8 shows the relationship between the wind direction 53 when the yaw error is very small and the wind direction at the anemometer position in FIG. 7. Since the lower wind direction 56c measured by the lower anemometer 32c and the upper wind direction 56d measured by the upper anemometer 32d are located at the center of the left and right sides of the rotor 24 (on the extension line of the center of the nacelle 21), the wind power generator 2 Even when affected by the nacelle 21 and the rotor 24, the wind direction is often the same.

Next, FIG. 9 shows a relationship diagram of the wind direction 53 when a yaw error occurs and the wind direction at the anemometer position in FIG. 7. The lower wind direction 56c measured by the lower anemometer 32c and the upper wind direction 56d measured by the upper anemometer 32d are different from the wind direction 53 before the inflow of the wind power generator 2 due to the influence of the nacelle 21 and the rotor 24 of the wind power generator 2. The measurement result is shown.

Specifically, the lower wind direction 56c is more strongly influenced by the nacelle 21 and the rotor 24, so that the wind direction is largely curved, while the upper wind direction 56d is less affected by the nacelle 21 and the rotor 24, and the wind direction 53 is more. The wind direction is close to.

As shown in FIGS. 8 and 9, the wind direction 53 and the wind directions 56c and 56d measured by the anemometer on the nacelle are considered to indicate different wind directions. Therefore, it is necessary to calculate the correct wind direction from the measurement result of the anemometer and derive the yaw error. Since the relationship between the wind direction 53 and the wind directions 56c and 56d measured by the anemometer on the nacelle changes depending on the shape of the nacelle and the like, the relationship may be different from those in FIGS. 8 and 9.

FIG. 10 shows a functional block diagram of a wind condition measuring (observation) device that executes the wind condition measuring method of this embodiment. The measuring device 37 includes a storage unit 311, a measured value acquisition unit 313, and a yaw error calculation unit 315, which are connected to each other so as to be accessible by an internal bus 319.

Although the explanation is divided into each functional block for easy understanding, a configuration in which a desired functional block is integrated may be used.

The measured value acquisition unit 313 acquires the wind direction data measured by the lower anemometer 32c and the upper anemometer 32d via the input I / F317c, the input I / F317d, and the internal bus 319, and obtains, for example, A / D conversion. Perform processing, smoothing processing (noise removal), normalization processing, and the like.

At least, the yaw error in the wind power generator 2 and the relationship between the lower wind direction 56c measured by the lower anemometer 32c and the upper wind direction 56d measured by the upper anemometer 32d are stored in the storage unit 311 in advance. ..

The yaw error calculation unit 315 accesses the storage unit 311 via the internal bus 319, and reads out the yaw error based on the wind direction flowing into the wind power generation device 2 from the storage unit 311. The obtained yaw error is output to the yaw angle control device 33 through the output I / F 318.

As described above, in the wind power generation device 2 of the present embodiment, at least two anemometers (32c, 32d) are arranged in front of and behind the nacelle 21 with respect to the wind direction in the upper part of the nacelle 21 of the wind power generation device 2. Moreover, the anemometer (32c) on the wind side is arranged at a position lower than the anemometer (32d) on the wind side.

According to this embodiment, it is possible to provide highly accurate wind condition measurement without increasing the cost more than necessary, and to provide a wind power generation device and a wind condition measurement method applicable to various regions. It becomes.

Specifically, new measurement is performed by using the measurement results of the two upper and lower anemometers (lower anemometer 32c and upper anemometer 32d) installed on the upper part of the nacelle 21 and the data stored in the storage unit 311. It is possible to measure the yaw error with higher accuracy without installing any equipment. As a result, the yaw angle control device 33 enables highly accurate yaw angle control (correction), and the amount of power generated by the wind power generation device can be improved.

The wind power generation device and the wind condition measurement method of the third embodiment will be described with reference to FIG. A detailed description of the points that overlap with those of the first and second embodiments will be omitted.

The feature of this embodiment is that a plurality of wind direction data are acquired from a single (one) anemometer installed on the nacelle. Therefore, the anemometer may be installed at any of the positions shown in FIGS. 3 and 7.

FIG. 11 shows a functional block diagram of a wind condition measuring (observation) device that executes the wind condition measuring method of this embodiment. The measuring device 37 includes a storage unit 311, a storage unit 312, a measured value acquisition unit 313, and a yaw error calculation unit 315, which are connected to each other so as to be accessible by an internal bus 319.

Although the explanation is divided into each functional block for easy understanding, a configuration in which a desired functional block is integrated may be used.

The measured value acquisition unit 313 acquires the wind direction data measured by the wind direction (wind speed) meter 32 via the input I / F 317 and the internal bus 319, and for example, A / D conversion processing and smoothing processing (noise removal). Or, perform normalization processing and the like.

The obtained wind direction data is once stored in the storage unit 312. At this time, the storage unit 311 stores the relationship between the wind direction data in at least two or more different time stamps and the yaw error at the time of data processing.

The yaw error calculation unit 315 accesses the storage unit 311 and the storage unit 312 via the internal bus 319, and reads out the yaw error based on the wind direction flowing into the wind power generation device 2 from the storage unit 311. The obtained yaw error is output to the yaw angle control device 33 through the output I / F 318.

As described above, in the wind power generation device 2 of the present embodiment, the anemometer 32 is a single anemometer 32 arranged outside the nacelle 21 of the wind power generation device 2, and a plurality of wind direction data at different times. To get.

According to this embodiment, it is possible to provide a wind power generation device and a wind condition measurement method that can measure the wind condition with high accuracy and can be applied in various regions with only one anemometer 32. It becomes.

Specifically, a plurality of measurement results of one anemometer 32 are stored in the storage unit 312, and the data stored in the storage unit 311 is used based on the change in the wind direction with time (time). It is possible to measure the yaw error with higher accuracy without installing a new measuring device.

The wind power generation device and the wind condition measurement method of the fourth embodiment will be described with reference to FIG. It should be noted that detailed description of the points overlapping with Examples 1 to 3 will be omitted.

A feature of this embodiment is that wind speed data is acquired in addition to a plurality of wind direction data. Therefore, the anemometer 32 may be installed at any of the positions shown in FIGS. 3 and 7. Further, the anemometer 39 may be installed at any point as long as it is around the nacelle of the wind power generator 2.

FIG. 12 shows a functional block diagram of a wind condition measuring (observation) device that executes the wind condition measuring method of this embodiment. The measuring device 37 includes a storage unit 311, a measured value acquisition unit 313, and a yaw error calculation unit 315, which are connected to each other so as to be accessible by an internal bus 319.

Although the explanation is divided into each functional block for easy understanding, a configuration in which a desired functional block is integrated may be used.

The measured value acquisition unit 313 acquires the wind direction data and the wind speed data measured by the anemometer 32 and the anemometer 39 via the input I / F317 and the input I / F317e and the internal bus 319, for example, A / D conversion. Perform processing, smoothing processing (noise removal), normalization processing, and the like.

At least, the relationship between the yaw error in the wind power generator 2 and the wind direction measured by the anemometer 32 and the wind speed measured by the anemometer 39 is stored in the storage unit 311 in advance.

The yaw error calculation unit 315 accesses the storage unit 311 via the internal bus 319, and reads out the yaw error based on the wind direction and the wind speed flowing into the wind power generator 2 from the storage unit 311. The obtained yaw error is output to the yaw angle control device 33 through the output I / F 318.

As described above, in the wind condition measurement method of the wind power generator of this embodiment, the wind speed data is acquired from the anemometer 39, and the relationship between the wind speed data and the yaw error is acquired from the database (storage unit 311) stored in advance. Read the yaw error corresponding to the wind speed data.

According to this embodiment, it is possible to provide a wind power generation device and a wind condition measurement method that can measure wind conditions with high accuracy and can be applied in various regions.

The main factor that the wind direction measured by the anemometer 32 installed in the wind power generator 2 differs from the actual wind direction 53 is largely influenced by the structure such as the nacelle and the rotor. At this time, the changes in the flow field due to these structures change depending on the features of the fluid such as the Reynolds number, and these features are a function of the wind speed. Therefore, by creating data including the wind speed and storing it in the storage unit, it is possible to measure the yaw error with higher accuracy.

The wind power generation device and the wind condition measurement method of the fifth embodiment will be described with reference to FIG. It should be noted that detailed description of the points overlapping with Examples 1 to 4 will be omitted.

The feature of this embodiment is that the operation data of the wind power generation device 2 is acquired in addition to the plurality of wind direction data. Therefore, the anemometer 32 may be installed at any of the positions shown in FIGS. 3 and 7.

FIG. 13 shows a functional block diagram of a wind condition measuring (observation) device that executes the wind condition measuring method of this embodiment. The measuring device 37 includes a storage unit 311, a measured value acquisition unit 313, and a yaw error calculation unit 315, which are connected to each other so as to be accessible by an internal bus 319.

Although the explanation is divided into each functional block for easy understanding, a configuration in which a desired functional block is integrated may be used.

The measured value acquisition unit 313 acquires the wind direction data measured by the anemometer 32 through the input I / F 317 and the internal bus 319, and the operating state such as the generator torque and the rotor rotation speed of the wind power generator 2 from the control device 31. Get information about.

The storage unit 311 has at least a relationship between the yaw error in the wind power generator 2 and the wind direction measured by the anemometer 32 and the operating state of the wind power generator 2 such as the generator torque, the rotor rotation speed, and the command value of the pitch angle. It is stored in advance.

The yaw error calculation unit 315 accesses the storage unit 311 via the internal bus 319, and reads out the yaw error based on the wind direction flowing into the wind power generation device 2 from the storage unit 311 and the operating state of the wind power generation device 2. The obtained yaw error is output to the yaw angle control device 33 through the output I / F 318.

As described above, in the wind condition measurement method of the wind power generation device of this embodiment, the data on the operating state of the wind power generation device 2 is acquired, and the relationship between the data on the operating state of the wind power generation device and the yaw error is stored in advance. From the database (storage unit 311), the yaw error corresponding to the acquired data on the operating state of the wind power generation device 2 is read.

According to this embodiment, it is possible to provide a wind power generation device and a wind condition measurement method that can measure wind conditions with high accuracy and can be applied in various regions.

The main factor that the wind direction measured by the anemometer 32 installed in the wind power generator 2 differs from the actual wind direction 53 is largely influenced by the structure such as the nacelle and the rotor. At this time, the influence of the rotor 24 of the wind power generation device 2 changes depending on the amount of wind kinetic energy converted into rotational energy by the wind power generation device 2, so that the rotor 24 affects the wind conditions depending on the operating state of the wind power generation device 2. The impact also changes.

Therefore, by storing the operating state of the wind power generation device 2 such as the rotor rotation speed in the storage unit 311, it is possible to measure the yaw error with higher accuracy.

The wind power generation device and the wind condition measurement method of the sixth embodiment will be described with reference to FIG. A detailed description of the points that overlap with those of Examples 1 to 5 will be omitted.

The present embodiment relates to the method of creating the storage unit 311 in the present invention. FIG. 14 shows a schematic image of a local site when creating data to be stored in the storage unit 311.

In order to create the data to be stored in the storage unit 311, it is necessary to correctly measure the wind direction 53 flowing into the wind power generator 2 and store it in the storage unit 311 in addition to the result measured by the anemometer 32. Therefore, a wind condition measurement (observation) device 500 is installed around the target wind power generation device 2 (on the windward side of the main wind direction or on the side perpendicular to the main wind direction), and the measurement result is stored in the storage unit as the wind direction 53. To do. At this time, as the wind condition measurement (observation) device 500, for example, an anemometer installed in the wind condition observation tower, a Doppler Lidar, which is a wireless wind condition measurement device based on the Doppler law, or the like is used. May be good.

It is desirable that the installation location of the wind condition measurement (observation) device 500 is a location where the same wind conditions as the wind conditions flowing into the wind power generation device 2 are observed, but they are completely equal due to the influence of the surrounding topography and buildings. It is possible that the wind conditions cannot be measured. In this case, the result obtained by the wind condition measurement (observation) device 500 may be corrected by a physical model, numerical analysis, or the like and stored in the storage unit as the wind direction 53.

As described above, in the wind condition measurement method of the wind power generation device of this embodiment, a database (the wind direction data measured by the wind condition measurement (observation) device 500 installed around (near) the wind power generation device 2) is used. The storage unit 311) is created (configured).

According to this embodiment, it is possible to create a storage unit for providing a wind condition measurement method for a wind power generator applicable in various regions. The advantage of using the method of this embodiment is that it is possible to construct a storage unit that takes into account the wind condition characteristics at the site where the wind power generation device 2 is installed. Wind conditions change depending on the terrain and climate around the wind farm. Therefore, the relationship between the wind direction measurement result and the wind direction 53 flowing into the wind power generation device 2 may change depending on the installation location of the wind power generation device 2. Therefore, it is desirable that the data stored in the storage unit 311 considers the characteristics of the installation location of the wind power generation device 2.

According to the method of this embodiment, it is possible to create a storage unit including the characteristics of the place where the wind power generation device is installed and estimate the yaw error with higher accuracy.

Following the sixth embodiment, the wind power generation device and the wind condition measurement method of the seventh embodiment will be described with reference to FIG. It should be noted that detailed description of the points overlapping with Examples 1 to 6 will be omitted.

The present embodiment relates to the method of creating the storage unit 311 in the present invention, and is characterized in that the data stored in the storage unit 311 is created in advance by a model test or a numerical fluid analysis.

In order to create the storage unit 311, it is necessary to measure the relationship between the wind direction measurement result and the wind direction 53 flowing into the wind power generation device 2 under all yaw error conditions that can flow into the wind power generation device 2. Therefore, in the case of the method described in the sixth embodiment, long-term measurement may be required to acquire all the data to be stored in the storage unit 311.

Therefore, in the wind condition measurement method of the wind power generation device in this embodiment, the storage unit 311 is created in advance by a model test such as a wind tunnel experiment or a numerical fluid analysis.

When the wind tunnel experiment is used in the creation of the storage unit 311, the wind condition measurement (observation) device 500 in FIG. 14 becomes unnecessary, and the wind direction 53 can be evaluated as the setting condition of the experiment.

Further, even when the storage unit 311 is created by the numerical fluid analysis, the wind direction 53 can be evaluated by setting the boundary conditions in the analysis. Therefore, since the creator of the storage unit 311 can artificially prepare the conditions, it is possible to shorten the creation time of the storage unit 311.

Further, since the data to be stored in the storage unit 311 is created under ideal conditions with less disturbance, the effect of each wind condition factor can be clearly evaluated.

As described above, in the wind condition measurement method of the wind power generator of this embodiment, a database (storage unit 311) is created (configured) by a model test or numerical fluid analysis of the wind direction data measured by the anemometer 32.

According to this embodiment, it is possible to create a storage unit for providing a wind condition measurement method for a wind power generator applicable in various regions. In particular, according to the method described in this embodiment, it is possible to prepare this wind condition measurement method in a short period of time and apply it to an actual wind power generation device.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. It is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

2 ... Anemometer 20 ... Tower 21 ... Nasser 22 ... Hub 23 ... Blade 24 ... Rotor 25 ... Main shaft 27 ... Anemometer 28 ... Generator 29 ... Main frame 30 ... Power converter 31 ... Control device 32 ... Wind direction (wind speed) ) Total 32a ... Right anemometer 32b ... Left side anemometer 32c ... Lower anemometer 32d ... Upper anemometer 33 ... Yaw angle control device 34 ... Pitch angle control device 35 ... Generator control device 37 ... Measuring device 39 ... Anemometer 51 ... Nacelle direction 53 ... Wind direction 55 ... Yaw error 56a ... Right side wind direction 56b ... Left side wind direction 56c ... Lower wind direction 56d ... Upper wind direction 311 ... Storage unit 312 ... Storage unit 313 ... Measured value acquisition unit 315 ... Yaw error calculation unit 317 ... Input I / F
317a ... Input I / F
317b ... Input I / F
317c ... Input I / F
317d ... Input I / F
317e ... Input I / F
318 ... Output I / F
319 ... Internal bus 500 ... Wind condition measurement (observation) device

Claims (15)

Obtain multiple wind direction data from the anemometer and
A method for measuring wind conditions of a wind power generator, which comprises reading the yaw error corresponding to a plurality of acquired wind direction data from a database in which the relationship between the wind direction data and the yaw error is stored in advance. The method for measuring wind conditions of a wind power generator according to claim 1.
A method for measuring wind conditions in a wind power generation device, wherein a plurality of the anemometers are arranged outside the nacelle of the wind power generation device. The method for measuring wind conditions of a wind power generator according to claim 1.
The anemometer is characterized in that at least two anemometers are arranged on the left and right sides of the nacelle with respect to the wind direction in the upper part of the nacelle of the wind power generator, and are arranged at substantially the same height from the upper part of the nacelle. Wind condition measurement method for wind power generators. The method for measuring wind conditions of a wind power generator according to claim 1.
At least two anemometers are arranged in front of and behind the nacelle with respect to the wind direction in the upper part of the nacelle of the wind power generator, and the anemometer on the wind side is arranged at a position lower than the anemometer on the leeward side. A method of measuring the wind condition of a wind power generator, which is characterized by the fact that it is used. The method for measuring wind conditions of a wind power generator according to claim 1.
The anemometer is a single anemometer arranged outside the nacelle of the wind power generator, and is a method for measuring wind conditions of the wind power generator, characterized in that a plurality of wind direction data at different times are acquired. The method for measuring wind conditions of a wind power generator according to claim 1.
Obtain wind speed data from the anemometer and
A method for measuring wind conditions of a wind power generator, which comprises reading the yaw error corresponding to the acquired wind speed data from a database in which the relationship between the wind speed data and the yaw error is stored in advance. The method for measuring wind conditions of a wind power generator according to claim 1.
Obtain data on the operating status of the wind power generator
Wind condition measurement of a wind turbine generator, which is characterized by reading the yaw error corresponding to the acquired data on the operating condition of the wind turbine generator from a database that stores the relationship between the data on the operating condition of the wind turbine generator and the yaw error in advance. Method. The method for measuring wind conditions of a wind power generator according to claim 1.
A method for measuring wind conditions of a wind power generator, which comprises creating the database based on wind direction data measured by a wind condition measuring device installed in the vicinity of the wind power generator. The method for measuring wind conditions of a wind power generator according to claim 1.
A method for measuring wind conditions of a wind power generator, which comprises creating the database by a model test of wind direction data measured by the anemometer or numerical fluid analysis. Anemometer and
A measurement value acquisition unit that acquires a plurality of wind direction data from the anemometer,
A storage unit that stores the relationship between wind direction data and yaw error in advance,
A yaw error calculation unit that reads a yaw error corresponding to a plurality of wind direction data acquired by the measurement value acquisition unit from the storage unit is provided.
A wind power generator characterized in that the yaw angle is controlled based on the yaw error read by the yaw error calculation unit. The wind power generator according to claim 10.
A plurality of the anemometers are arranged outside the nacelle of the wind power generation device. The wind power generator according to claim 10.
The anemometer is a single anemometer arranged outside the nacelle of the wind power generator, and is a wind power generator characterized by acquiring a plurality of wind direction data at different times. The wind power generator according to claim 10.
Equipped with an anemometer
The storage unit stores in advance the relationship between the wind speed data and the yaw error.
The yaw error calculation unit is a wind power generation device characterized in that the yaw error corresponding to the wind speed data acquired by the measured value acquisition unit is read from the storage unit. The wind power generator according to claim 10.
The measured value acquisition unit acquires data on the operating state of the wind power generator, and obtains data.
The storage unit stores in advance the relationship between the data relating to the operating state of the wind power generator and the yaw error.
The wind power generation device is characterized in that the yaw error calculation unit reads from the storage unit the yaw error corresponding to the data related to the operating state of the wind power generation device acquired by the measurement value acquisition unit. The wind power generator according to claim 10.
A wind power generator characterized in that the relationship between the wind direction data of the storage unit and the yaw error is created by a model test of the wind direction data measured by the anemometer or numerical fluid analysis.

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