CN115980786B - Wind profile monitoring method and system - Google Patents
Wind profile monitoring method and system Download PDFInfo
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- CN115980786B CN115980786B CN202211639574.4A CN202211639574A CN115980786B CN 115980786 B CN115980786 B CN 115980786B CN 202211639574 A CN202211639574 A CN 202211639574A CN 115980786 B CN115980786 B CN 115980786B
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Abstract
The invention discloses a wind profile monitoring method and a system, wherein the method comprises the following steps: setting elevation angles and distance resolutions of detection beams of the laser anemometry radar and the profile radar; controlling a laser wind measuring radar and a wind profile radar to emit detection beams along a plurality of directions according to set elevation angles and distance resolutions, and extracting radial wind speed data corresponding to each detection beam according to each returned detection beam; inversion is carried out according to the obtained radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer; and synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of the plurality of height layers. According to the invention, the laser wind-finding radar is vertically layered, and the wind-finding radar is combined to perform collaborative scanning, so that the problem of limited vertical detection capability in the wind-finding monitoring process is solved, and the fine monitoring requirement on wind-finding monitoring is met.
Description
Technical Field
The invention relates to the field of high-altitude wind energy capture, in particular to a wind profile monitoring method and system.
Background
The air contains abundant high-altitude wind energy, the wind direction is stable and intermittent and small, and particularly in the field of wind power generation, the high-altitude wind energy has the potential and value of continuous development, so that the high-altitude wind energy capturing technology is also attracting more and more attention, and in the high-altitude wind energy capturing, the wind speed, the wind direction and the vertical speed change condition of the running height range of the wind energy capturing device are required to be monitored in real time, namely, a finer wind profile with the vertical wind speed is required to be obtained.
The existing wind profile monitoring technology mainly utilizes an independent wind profile radar to monitor, the wind profile radar emits beams to the air, horizontal wind speeds and wind directions on different height layers are calculated through radar echo signals (radial speeds), but because electromagnetic wavelengths adopted by the wind profile radar are in the centimeter level and limited by wavelengths, certain detection dead zones exist in a low-altitude area below 100 meters, data cannot be acquired, and a mooring device can enter the height range in the initial lift-off or emergency recovery process, so that the monitoring requirement of the full height range cannot be ensured by the independent wind profile radar, in addition, because of the limitation of the electromagnetic wavelengths of the wind profile radar, the resolution of the independent wind profile radar in the vertical direction is generally 50-100 meters, finer vertical layering data cannot be acquired, and therefore, the requirement of attitude control on a fine wind profile during the operation of a high-altitude wind power generation system is difficult to meet.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a wind profile monitoring method and a wind profile monitoring system, solves the problem that the vertical detection capability is limited in the wind profile monitoring process, and meets the requirement of fine monitoring on wind profile monitoring.
The embodiment of the invention provides a wind profile monitoring method, which comprises the following steps:
setting elevation angles and distance resolutions of detection beams of the laser anemometry radar and the profile radar;
controlling a laser wind measuring radar and a wind profile radar to emit detection beams along a plurality of directions according to set elevation angles and distance resolutions, and extracting radial wind speed data corresponding to each detection beam according to each returned detection beam;
inversion is carried out according to the obtained radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer;
and synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of the plurality of height layers.
Further, the laser wind measuring radar and the wind profile radar are controlled to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution, and each radial wind speed data corresponding to each detection beam is extracted according to each returned detection beam, and the method specifically comprises the following steps:
controlling a laser wind measuring radar and a wind profile radar to rotate according to the set non-vertical elevation angle by taking the direction of a vertical zenith as an axis, sequentially transmitting non-vertical detection beams with a fixed rotation angle in the rotating process, and extracting each first radial wind speed data corresponding to each returned non-vertical detection beam;
and controlling the laser wind measuring radar and the profile radar to emit a vertical detection beam along the direction vertical to the zenith, and extracting each second radial wind speed data according to the returned vertical detection beam.
Further, according to each returned detection beam, extracting the signal-to-noise ratio corresponding to each radial wind speed data under each detection beam;
further, the inverting according to the obtained radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each altitude layer includes:
comparing the signal-to-noise ratio corresponding to each radial wind speed data with a preset signal-to-noise ratio threshold value, and taking the radial wind speed data with the signal-to-noise ratio greater than or equal to the preset signal-to-noise ratio threshold value as effective radial wind speed data;
and carrying out inversion according to the effective radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each altitude layer.
Further, the inversion is performed according to each effective radial wind speed data to obtain a horizontal wind speed and a vertical wind speed of each altitude layer, which specifically comprises:
when the second radial wind speed data and the first radial wind speed data of the same height layer are effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; taking the second radial wind speed data of the height layer as the vertical wind speed of the height layer;
when the first radial wind speed data of the same height layer are all effective radial wind speed data and the second radial wind speed data are not the effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; and carrying out mean value operation on all the first radial wind speed data, and calculating the vertical wind speed of the height layer according to the mean value operation result and the elevation angle of the non-vertical detection beam.
Further, the method for synthesizing the radial wind speed profile according to the horizontal wind speed and the vertical wind speed of the plurality of height layers specifically comprises the following steps:
when the horizontal wind speed of the height layer comprises the horizontal wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the horizontal wind speed corresponding to the laser wind measuring radar as the horizontal wind speed to be synthesized of the height layer;
when the horizontal wind speed of one height layer is the horizontal wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the horizontal wind speed of the height layer as the horizontal wind speed to be synthesized;
when the vertical wind speed of the height layer comprises the vertical wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the vertical wind speed corresponding to the laser wind measuring radar as the vertical wind speed to be synthesized of the height layer;
when the vertical wind speed of one height layer is the vertical wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the vertical wind speed of the height layer as the vertical wind speed to be synthesized;
and synthesizing a radial wind speed profile according to the horizontal wind speed to be synthesized and the vertical wind speed to be synthesized of each height layer.
Further, when the horizontal wind speed and the vertical wind speed of a height layer are absent,
taking the fixed time lengths before and after the detection time point of the height layer as a time average window, calculating the total time length of the time average window and the time sharing length of the horizontal wind speed and the vertical wind speed,
when the time sharing period is greater than half of the total time period,
carrying out average value operation on the horizontal wind speed in the time division length to obtain the average horizontal wind speed of the height layer, and taking the average horizontal wind speed as the horizontal wind speed to be synthesized;
and carrying out average value operation on the vertical wind speeds in the time division length to obtain the average vertical wind speed of the height layer, and taking the average vertical wind speed as the vertical wind speed to be synthesized.
Further, the method further comprises the following steps:
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of the upper height layer and the lower height layer exist, calculating the synthesized radial wind speed profile data of the upper height layer and the lower height layer according to a linear interpolation method to obtain the radial wind speed profile data which is not measured;
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of a plurality of height layers above or below the height layer does not exist, performing interpolation operation according to the synthesized radial wind speed profile data of the previous time average window of the height layer to obtain the radial wind speed profile data which is not measured;
and optimizing the synthetic radial wind speed profile according to the obtained missing radial wind speed profile data.
The embodiment of the invention also provides a wind profile monitoring system, which comprises: a main control server, a laser wind-finding radar industrial personal computer and a wind profile radar industrial personal computer,
the main control server is used for sending a setting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the wind profile radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the main control server is also used for sending a transmitting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is also used for controlling the laser wind-finding radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the sending instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and then transmitting each radial wind speed data to the main control server;
the wind profile radar industrial personal computer is also used for controlling the wind profile radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the transmission instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and transmitting each radial wind speed data to the main control server;
the main control server performs inversion according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer; and synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of the plurality of height layers.
Further, the wind profile monitoring system further comprises a data storage server, wherein the storage server stores radial wind speed data corresponding to each returned detection beam.
The embodiment of the invention has the following beneficial effects:
in the invention, the laser wind-finding radar and the wind-profile radar cooperatively scan, and because the laser wind-finding radar has a transmitting beam with smaller resolution compared with the wind-profile radar, the laser wind-finding radar can monitor finer vertical wind speed, further, the wind-profile condition of a low-empty area can be detected, meanwhile, the laser wind-finding radar and the wind-profile radar jointly monitor, the monitoring process is more stable, and the obtained wind-profile data is more comprehensive and accurate. Therefore, the invention solves the problems of low-altitude blind area and limited vertical detection capability when the traditional single wind profile radar measures the vertical wind speed of the wind profile, and meets the requirement of fine monitoring on wind profile monitoring.
Drawings
FIG. 1 is a flow chart illustrating steps of a method for wind profile monitoring according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a vertical layering of a laser wind-finding radar and a wind-profile radar according to an embodiment of the present invention;
FIG. 3 is a flow chart of detection of laser wind lidar and a beam emitted by a profile radar in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of five-beam scanning in an embodiment of the present invention;
FIG. 5 is a flow chart of data inversion in an embodiment of the invention;
FIG. 6 is a flow chart of radial wind profile synthesis in an embodiment of the invention;
FIG. 7 is a plot of wind profile stain at 2 minute particle size over approximately 6 hours in an embodiment of the present invention;
FIG. 8 is a plot of average radial wind profiles 2 minutes, 5 minutes, 10 minutes prior to the current time point in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, a wind profile monitoring method according to an embodiment of the present invention includes at least the following steps:
step S1: setting elevation angles and distance resolutions of detection beams of the laser anemometry radar and the profile radar;
in a preferred embodiment, the elevation and range resolution of the probe beam of the lidar and the profile radar are set, including setting the vertical stratification of the lidar in equidistant fashion, when the range resolution of the probe beam is set to 30 meters, the probe beam elevation is set toαThe interval between the vertical height layers is 30cos alpha meters, and the lowest height is 30 meters, as shown in fig. 2 (a); likewise, the elevation angle of the detection beam of the wind profile radar is set asαSetting low, medium and high modes and low modes for distance resolution of wind profile radarThe vertical distance resolution is 50 meters, the upper detection limit is 300 meters, the vertical distance resolution in the middle mode is 50 meters, the upper detection limit is 800 meters, the vertical distance resolution in the high mode is 100 meters, the upper detection limit is 5000 meters, as shown in fig. 2 (b), it should be noted that,αthe specific value of (2) can be set according to the actual situation.
Preferably, the above process further comprises setting an observation period of the laser wind-finding radar and the profile radar, and setting the initial observation time to 0 hours a day, so that 24 hours a day is continuously observed.
Through the embodiment, the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar and the wind profile radar can be set, and meanwhile, the observation period is set, so that the radar can monitor in real time according to the set parameters.
S2, controlling a laser anemometer radar and a wind profile radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution, and extracting radial wind speed data corresponding to each detection beam according to each returned detection beam; the method specifically comprises the following steps:
controlling a laser wind measuring radar and a wind profile radar to rotate according to the set non-vertical elevation angle by taking the direction of a vertical zenith as an axis, sequentially transmitting non-vertical detection beams with a fixed rotation angle in the rotating process, and extracting each first radial wind speed data corresponding to each returned non-vertical detection beam;
controlling the laser wind measuring radar and the profile radar to emit a vertical detection beam along the direction of the vertical zenith, and extracting each second radial wind speed data according to the returned vertical detection beam;
in a preferred embodiment, when the wind profile needs to be monitored, according to the instrument setting, the laser wind-finding radar and the wind-profile radar emit probe beams simultaneously for scanning, and the exemplary scanning mode is five-beam scanning, please refer to fig. 3, namely, according to the preset non-vertical elevation angle of the instrument, a beam of non-vertical probe beams is emitted every 90 ° azimuth angle (i.e. the fixed rotation angle is 90 °), and then 4 times of scanning of specific azimuth angles are completed, according to the requirementThe returned non-vertical detection beams obtain radial wind speed data of each height layer, which are respectively recorded asU r, N 、U r, E 、U r, S 、U r, W As the first radial wind speed data, finally, a vertical detection beam is emitted to the zenith vertically to finish vertical scanning, and the radial wind speed of each height layer along the beam direction is obtained and recorded asU r, C As second radial wind speed data. Each scanning also simultaneously obtains the signal to noise ratio of the radial wind speed detection result, which is recorded asSNR。
In addition, each scan of the lidar and the profile radarU r, N 、U r, E 、U r, S 、U r, W 、U r, C And (b)SNRThe method comprises the steps of storing the latest scanning results in a file form, opening file transmission service on the laser wind-finding radar and the industrial personal computer of the profile radar, pushing the latest scanning results to a data storage server in real time for storage, and further, reserving each scanning result on a local hard disk on the laser wind-finding radar and the industrial personal computer of the profile radar as backup, wherein the backup is shown in fig. 4.
Preferably, the laser anemometer radar and the profile radar are subjected to unified time service at 0 time per day, so that the observation synchronization is ensured;
through the embodiment, the laser anemometer radar and the wind profile radar can be controlled to emit detection beams simultaneously, and first radial wind speed data, second radial wind speed data and second radial wind speed data can be obtained according to the returned detection beamsSNRData.
In a preferred embodiment, the above data may also be stored in a data storage server.
S3, inverting according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer;
inversion is carried out according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer, and the inversion method comprises the following steps:
comparing the signal-to-noise ratio corresponding to each radial wind speed data with a preset signal-to-noise ratio threshold value, and taking the radial wind speed data with the signal-to-noise ratio greater than or equal to the preset signal-to-noise ratio threshold value as effective radial wind speed data;
preferably, inversion is performed according to each effective radial wind speed data to obtain a horizontal wind speed and a vertical wind speed of each altitude layer, specifically:
when the second radial wind speed data and the first radial wind speed data of the same height layer are effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; taking the second radial wind speed data of the height layer as the vertical wind speed of the height layer;
when the first radial wind speed data of the same height layer are all effective radial wind speed data and the second radial wind speed data are not the effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; and carrying out mean value operation on all the first radial wind speed data, and calculating the vertical wind speed of the height layer according to the mean value operation result and the elevation angle of the non-vertical detection beam.
In a preferred embodiment, the threshold value is based on the instrument signal-to-noise ratio provided by the lidar manufacturer and the profile radar manufacturerSNRcJudging the signal-to-noise ratio in each scanning result, when the scanning is performedSNRGreater than or equal toSNRcWhen the radial wind speed scanning result is regarded as effective radial wind speed data, the method can be used for subsequent data inversion; otherwise, the result is regarded as invalid, and is marked as missing measurement, and is not used for the subsequent data inversion, please refer to fig. 5.
An illustrative example of inversion from each effective radial wind speed data is as follows:
using effective radial wind speed dataU r, N 、U r, E 、U r, S 、U r, W 、U r, C Estimating horizontal wind speed of each altitude layeruVertical velocityw。
When (when)U r, N 、U r, E 、U r, S 、U r, W 、U r, C And when the wind speed data are effective radial wind speed data, the calculation formula is as follows:
w = U
r, C
when (when)U r, N 、U r, E 、U r, S 、U r, W Is the effective radial wind speed data,U r, C in the absence, the calculation formula is as follows:
in the method, in the process of the invention,αthe beam elevation angle is detected for a laser anemometer radar or a wind profile radar.
By the embodiment, the acquired first radial wind speed data, second radial wind speed data and the acquired second radial wind speed data can be processedSNRAnd calculating to obtain the horizontal wind speed and the vertical wind speed of each height layer, wherein the method comprises the step of calculating second radial wind speed data through the first radial wind speed data when the second radial wind speed data are invalid.
And S4, synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of the plurality of height layers.
In a preferred embodiment, when the horizontal wind speed of a height layer includes the horizontal wind speeds corresponding to the laser anemometry radar and the wind profile radar, the horizontal wind speed corresponding to the laser anemometry radar is used as the horizontal wind speed to be synthesized of the height layer;
when the horizontal wind speed of one height layer is the horizontal wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the horizontal wind speed of the height layer as the horizontal wind speed to be synthesized;
when the vertical wind speed of the height layer comprises the vertical wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the vertical wind speed corresponding to the laser wind measuring radar as the vertical wind speed to be synthesized of the height layer;
when the vertical wind speed of one height layer is the vertical wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the vertical wind speed of the height layer as the vertical wind speed to be synthesized;
and synthesizing a radial wind speed profile according to the horizontal wind speed to be synthesized and the vertical wind speed to be synthesized of each height layer.
Preferably, when the horizontal wind speed and the vertical wind speed of a height layer are absent,
taking the fixed time lengths before and after the detection time point of the height layer as a time average window, calculating the total time length of the time average window and the time sharing length of the horizontal wind speed and the vertical wind speed,
when the time sharing period is greater than half of the total time period,
carrying out average value operation on the horizontal wind speed in the time division length to obtain the average horizontal wind speed of the height layer, and taking the average horizontal wind speed as the horizontal wind speed to be synthesized;
and carrying out average value operation on the vertical wind speeds in the time division length to obtain the average vertical wind speed of the height layer, and taking the average vertical wind speed as the vertical wind speed to be synthesized.
Preferably, the method further comprises:
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of the upper height layer and the lower height layer exist, calculating the synthesized radial wind speed profile data of the upper height layer and the lower height layer according to a linear interpolation method to obtain the radial wind speed profile data which is not measured;
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of a plurality of height layers above or below the height layer does not exist, performing interpolation operation according to the synthesized radial wind speed profile data of the previous time average window of the height layer to obtain the radial wind speed profile data which is not measured;
and optimizing the synthetic radial wind speed profile according to the obtained missing radial wind speed profile data.
In a preferred embodimentIn an embodiment, a horizontal wind profile obtained by each inversion of a laser anemometer radar and a profile radaru lidar (z)、u profiler (z)Vertical wind velocity profile w lidar (z)、w profiler (z)Combining to form a single scan full height layer horizontal wind profile u (z) and a vertical wind profile w (z). The combination rule specifically comprises: for the same height layerz i If the horizontal wind speed and the vertical speed of the laser wind measuring radar and the profile radar are available, respectively recorded asu lidar (z i ) Andu profiler (z i ) And (b)w lidar (z i ) Andw profiler (z i ) Then the inversion result of the laser wind-finding radar is preferentially used, namelyu(z i )=u lidar (z i )，w(z i )=w lidar (z i ). If only one instrument of the laser wind measuring radar and the wind profile radar is available for measuring the horizontal wind speed and the vertical speed, the laser wind measuring radar is recorded asu aviable (z i ) Andu aviable (z i ) Thenu(z i )=u aviable (z i )，w(z i )=w aviable (z i ). If no data is available, the test is marked as a missing test. Further, time-averaging is performed for missing heights, specifically: take 2 minutes, 5 minutes, 10 minutes as time average window, record asTAt a corresponding time windowTIn this, the average horizontal wind speed and the average vertical speed of each height layer are calculated in turn and recorded asu m (z) Andw m (z) Exemplary average horizontal wind speed and vertical wind speed calculations are as follows:
in the method, in the process of the invention,z i is the firstiA plurality of height layers, each of which has a height,jindicating the first time windowjThe time of each time is equal to the time,Nrepresenting the effective sample number in a time window, the judging process can be equivalent to the time sharing length of the horizontal wind speed and the vertical wind speed,N≤N T ，N T for the total number of samples of a time window, the calculation process can be equivalent to the total duration of the time average window. Number of valid samplesNLess thanN T The time-sharing length of the horizontal wind speed and the vertical wind speed is less than the total time length of the time average window, and the average value of the time average window is regarded as invalid and is recorded as lack of measurement.
From the following componentsu m (z) Andw m (z) Further synthesizing radial wind velocity profilev r (z) The formula is as follows:
v r (z i ) =u m (z i )cosθ i +w m (z i )sinθ i
in the method, in the process of the invention,z i is the firstiA plurality of height layers, each of which has a height,θ i is the firstiThe optimal attitude angle of the tethered capture device on each height layer is given a suggested value by system control software on the master control server according to the umbrella shape, the number of umbrella groups and the arrangement scheme of the system and the current running state of the system.
Referring to FIG. 6, when the radial wind velocity profilev r (z) When the missing measured value appears, the contour interpolation is carried out, and the calculation of the schematic contour interpolation is as follows:
when the lack of measured value is distributed in the height layer which is not adjacent up and down, interpolation is carried out by utilizing a linear interpolation method, and the calculation formula is as follows;
in the method, in the process of the invention,z i in order for a high level of missing measurements to occur,z i+1 andz i-1 respectively is withz i And two adjacent upper and lower height layers.
When the lack of measurement value is found in the height layer with a plurality of continuous heights, the time average window corresponding to the lack of measurement value is obtainedT t Using the previous time-averaged windowT t-1 A kind of electronic devicev r (z) Interpolation is performed, and the calculation formula is as follows:
in the method, in the process of the invention,irepresent the firstiThe height layer is not needed to be measured,i=s, …e；z s to have the lowest level of successive missing measurements,z e to have the highest level of successive missing measurements,z s-1 is in combination withz s Adjacent next level.
According to the embodiment, the radial wind speed profile can be synthesized according to the inversion result, and meanwhile, the synthesized radial wind speed profile is further optimized by carrying out complementary calculation on the missing measurement value of the radial wind speed profile.
In a preferred embodiment, the method further comprises data visualization, in particular:
the average v of 2 minute particle size over nearly 6 hours was read r (z) plotting a graph like the color patch graph of FIG. 7, showing the continuously evolving characteristics of radial wind speed;
the last 2 min average, 5 min average, 10 min average v was read r And (z) drawing a line diagram as shown in fig. 8, marking the height range of the radial wind speed to be 3-30 m/s, and sending the data visualization result to a main control server to be used together with control software of the whole system.
On the basis of the method item embodiment of the invention, a system item embodiment is correspondingly provided;
another embodiment of the present invention provides a wind profile monitoring system comprising: a main control server, a laser wind-finding radar industrial personal computer and a wind profile radar industrial personal computer,
the main control server is used for sending a setting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the wind profile radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the main control server is also used for sending a transmitting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is also used for controlling the laser wind-finding radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the sending instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and then transmitting each radial wind speed data to the main control server;
the wind profile radar industrial personal computer is also used for controlling the wind profile radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the transmission instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and transmitting each radial wind speed data to the main control server;
the main control server performs inversion according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer; and synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of the plurality of height layers.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a wind profile monitoring method and a system, wherein a laser wind-finding radar and a wind profile radar cooperatively scan, and as the laser wind-finding radar has a transmitting beam with smaller resolution compared with the wind profile radar, finer vertical wind speed can be monitored, and further, the wind profile condition of a low-altitude area can be detected; in addition, the whole monitoring process has the characteristic of real-time through the setting of the observation period and the unified time service of the radar clock. Meanwhile, when the laser wind measuring radar and the wind profile radar are monitored together, the monitoring process is more stable, and the obtained wind profile data is more comprehensive and accurate. Therefore, the invention solves the problems of low-altitude blind area and limited detection resolution when the traditional single wind profile radar measures the vertical wind speed of the wind profile, and meets the requirement of fine monitoring of the wind profile.
The foregoing is a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A method of wind profile monitoring, comprising:
setting elevation angles and distance resolutions of detection beams of the laser anemometry radar and the profile radar;
controlling a laser wind measuring radar and a wind profile radar to emit detection beams along a plurality of directions according to set elevation angles and distance resolutions, and extracting radial wind speed data corresponding to each detection beam according to each returned detection beam;
inversion is carried out according to the obtained radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer;
synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of a plurality of height layers; the radial wind speed profile is synthesized according to the horizontal wind speed and the vertical wind speed of a plurality of height layers, and specifically comprises the following steps: when the horizontal wind speed of the height layer comprises the horizontal wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the horizontal wind speed corresponding to the laser wind measuring radar as the horizontal wind speed to be synthesized of the height layer; when the horizontal wind speed of one height layer is the horizontal wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the horizontal wind speed of the height layer as the horizontal wind speed to be synthesized; when the vertical wind speed of the height layer comprises the vertical wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the vertical wind speed corresponding to the laser wind measuring radar as the vertical wind speed to be synthesized of the height layer; when the vertical wind speed of one height layer is the vertical wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the vertical wind speed of the height layer as the vertical wind speed to be synthesized; and synthesizing a radial wind speed profile according to the horizontal wind speed to be synthesized and the vertical wind speed to be synthesized of each height layer.
2. The wind profile monitoring method according to claim 1, wherein the laser wind measuring radar and the wind profile radar are controlled to emit probe beams in a plurality of directions according to the set elevation angle and the set distance resolution, and each radial wind speed data corresponding to each probe beam is extracted according to each returned probe beam, and the method specifically comprises the steps of:
controlling a laser wind measuring radar and a wind profile radar to rotate according to the set non-vertical elevation angle by taking the direction of a vertical zenith as an axis, sequentially transmitting non-vertical detection beams with a fixed rotation angle in the rotating process, and extracting each first radial wind speed data corresponding to each returned non-vertical detection beam;
and controlling the laser wind measuring radar and the profile radar to emit a vertical detection beam along the direction vertical to the zenith, and extracting each second radial wind speed data according to the returned vertical detection beam.
3. A wind profile monitoring method as in claim 2, further comprising:
extracting the signal-to-noise ratio corresponding to each radial wind speed data under each detection beam according to each returned detection beam;
inversion is carried out according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer, and the inversion method comprises the following steps:
comparing the signal-to-noise ratio corresponding to each radial wind speed data with a preset signal-to-noise ratio threshold value, and taking the radial wind speed data with the signal-to-noise ratio greater than or equal to the preset signal-to-noise ratio threshold value as effective radial wind speed data;
and carrying out inversion according to the effective radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each altitude layer.
4. A wind profile monitoring method according to claim 3, wherein the inversion is performed according to each effective radial wind speed data to obtain a horizontal wind speed and a vertical wind speed of each altitude layer, and the method specifically comprises:
when the second radial wind speed data and the first radial wind speed data of the same height layer are effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; taking the second radial wind speed data of the height layer as the vertical wind speed of the height layer;
when the first radial wind speed data of the same height layer are all effective radial wind speed data and the second radial wind speed data are not the effective radial wind speed data, vector synthesis operation of horizontal wind speed is carried out on all the first radial wind speed data of the height layer, so that the horizontal wind speed of the height layer is obtained; and carrying out mean value operation on all the first radial wind speed data, and calculating the vertical wind speed of the height layer according to the mean value operation result and the elevation angle of the non-vertical detection beam.
5. The wind profile monitoring method of claim 4, further comprising:
when the horizontal wind speed and the vertical wind speed of a height layer are absent,
taking the fixed time lengths before and after the detection time point of the height layer as a time average window, and calculating the total time length of the time average window and the time division length of the horizontal wind speed and the vertical wind speed;
when the time sharing period is greater than half of the total time period,
carrying out average value operation on the horizontal wind speed in the time division length to obtain the average horizontal wind speed of the height layer, and taking the average horizontal wind speed as the horizontal wind speed to be synthesized;
and carrying out average value operation on the vertical wind speeds in the time division length to obtain the average vertical wind speed of the height layer, and taking the average vertical wind speed as the vertical wind speed to be synthesized.
6. A wind profile monitoring method as in claim 5, further comprising:
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of the upper height layer and the lower height layer exist, calculating the synthesized radial wind speed profile data of the upper height layer and the lower height layer according to a linear interpolation method to obtain the radial wind speed profile data which is not measured;
when the radial wind speed profile data of one height layer is not measured, and the synthesized radial wind speed profile data of a plurality of height layers above or below the height layer does not exist, performing interpolation operation according to the synthesized radial wind speed profile data of the previous time average window of the height layer to obtain the radial wind speed profile data which is not measured;
and optimizing the synthetic radial wind speed profile according to the obtained missing radial wind speed profile data.
7. A wind profile monitoring system, comprising: a main control server, a laser wind-finding radar industrial personal computer and a wind profile radar industrial personal computer,
the main control server is used for sending a setting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the wind profile radar industrial personal computer is used for setting the elevation angle and the distance resolution of the detection beam of the laser wind-finding radar according to the setting instruction after receiving the setting instruction;
the main control server is also used for sending a transmitting instruction to the laser wind finding radar industrial personal computer and the profile radar industrial personal computer;
the laser wind-finding radar industrial personal computer is also used for controlling the laser wind-finding radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the sending instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and then transmitting each radial wind speed data to the main control server;
the wind profile radar industrial personal computer is also used for controlling the wind profile radar to emit detection beams along a plurality of directions according to the set elevation angle and the set distance resolution after receiving the transmission instruction, extracting each radial wind speed data corresponding to each detection beam according to each returned detection beam, and transmitting each radial wind speed data to the main control server;
the main control server performs inversion according to the acquired radial wind speed data to obtain the horizontal wind speed and the vertical wind speed of each height layer; synthesizing a radial wind speed profile according to the horizontal wind speeds and the vertical wind speeds of a plurality of height layers; the radial wind speed profile is synthesized according to the horizontal wind speed and the vertical wind speed of a plurality of height layers, and specifically comprises the following steps: when the horizontal wind speed of the height layer comprises the horizontal wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the horizontal wind speed corresponding to the laser wind measuring radar as the horizontal wind speed to be synthesized of the height layer; when the horizontal wind speed of one height layer is the horizontal wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the horizontal wind speed of the height layer as the horizontal wind speed to be synthesized; when the vertical wind speed of the height layer comprises the vertical wind speed corresponding to the laser wind measuring radar and the wind profile radar, taking the vertical wind speed corresponding to the laser wind measuring radar as the vertical wind speed to be synthesized of the height layer; when the vertical wind speed of one height layer is the vertical wind speed corresponding to any one of the laser anemometer radar or the wind profile radar, taking the vertical wind speed of the height layer as the vertical wind speed to be synthesized; and synthesizing a radial wind speed profile according to the horizontal wind speed to be synthesized and the vertical wind speed to be synthesized of each height layer.
8. The wind profile monitoring system of claim 7, further comprising a data storage server that stores radial wind speed data corresponding to each returned probe beam.
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