CN112597621B - Terrain grading method and device for wind generating set - Google Patents
Terrain grading method and device for wind generating set Download PDFInfo
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Abstract
A method and a device for grading the terrain of a wind generating set comprise the following steps: collecting parameters including a digital topographic map of an area to be analyzed, a model of a wind generating set and the like; taking a wind generating set as a center, and making a plurality of concentric circles with different radiuses; taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining 36 basic sectors; in each basic sector, dividing each concentric circle into 2n arc lines by two adjacent rays, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines; calculating absolute difference values of the representative altitude of adjacent arcs in each basic sector, and judging the terrain level of the basic sector according to the number of the difference values; the terrain level of the area to be analyzed of the wind generating set is judged according to the terrain level of each basic sector contained in the area. The method can obviously improve the accuracy of the calculation result.
Description
Technical Field
The invention relates to the technical field of terrain grading of wind generating sets, in particular to a method and a device for grading the terrain of a wind generating set.
Background
When wind resources of a wind power plant and a wind generating set are evaluated, terrain grading needs to be carried out on an area to be evaluated in advance, and if the difference between the terrain grades of the two wind generating sets or the wind generating sets and a wind measuring tower is large, the fact that the wind energy resources between the two wind generating sets are affected by different terrains indicates that the wind generating sets are not suitable for sampling the same wind transfer function.
At present, the terrain classification of the wind generating set mainly adopts a RIX index method to classify the terrain into 0-4 grades, and then the final terrain grade is determined by combining an average dip angle. However, in the calculation of the RIX index, only the influence of the altitude on the terrain on the ray centered on the fan is considered, and the farther away from the fan, the wider the area between adjacent rays, and representing the altitude of the attachment fan-shaped area by a point on the ray at this time causes a large error, so that the result of the ground rating deviates greatly from the actual situation.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a device for grading the terrain of a wind generating set, which fully consider the influence of the terrain fluctuation of the whole sector area.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for grading the terrain of a wind generating set comprises the following steps:
step S1: collecting a digital topographic map including a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting related parameter information of the wind generating set;
step S2: selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer;
step S3: in a circular digital map, a wind generating set is taken as a center, and a plurality of concentric circles with different radiuses are made;
step S4: taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining a basic sector with 36 degrees of 10 degrees;
step S5: in each basic sector, dividing each concentric circle into 2n arc lines by two adjacent rays, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines;
step S6: calculating absolute difference values of the representative altitude of adjacent arcs in each basic sector, and judging the terrain level of the basic sector according to the number of the difference values;
step S7: the terrain level of the area to be analyzed of the wind generating set is judged according to the terrain level of each basic sector contained in the area.
Preferably, the step S3 specifically includes the following steps: in a circular digital map, a wind generating set is taken as a center, the first item is 1/2H, the last item is nH, an arithmetic progression with a tolerance of 1/2H is taken as a radius, and 2n concentric circles are formed, wherein H is the height of a hub of the wind generating set, and n is a positive integer.
Preferably, the step S5 specifically includes the following steps:
step S51: in each basic sector, two adjacent rays divide each concentric circle into 2n arc lines in total;
step S52: according to the length of the arc line, taking a plurality of reference points on the arc line;
step S53: and calculating the altitude of each reference point on the same arc, averaging, and taking the average as the representative altitude of the arc where the reference point is located.
Preferably, the S6 specifically includes the following steps:
step S61: in the same basic sector, calculating the absolute difference d of the representative altitudes of adjacent arcsi＝|ei-ei-1L, |; wherein eiAnd ei-1Means the representative altitude of the adjacent arcs in the same basic sector;
step S62: the number of statistical absolute differences exceeds 0.05(D + H), the number of basic sectors is 0, the number of basic sectors is 1, the number of basic sectors is 2, the number of basic sectors is 3, and the number of basic sectors is 4; and D is the diameter of the wind wheel of the wind generating set.
Preferably, the S7 specifically includes the following steps:
step S71: determining all basic sectors contained in a region to be analyzed of the wind generating set;
step S72: counting the number of adjacent arcs in each basic sector, the absolute difference of the representative altitude exceeds 0.05(D + H), and the average value of the above numbers of all basic sectors included in the area to be analyzed, the terrain level with the average value of 0 is 0, the terrain level with the average value in the range of (0,15) is 1, the terrain level with the average value in the range of [15,30) is 2, the terrain level with the average value in the range of [30,45) is 3, and the terrain level with the average value in the range of [45, ∞) is 4.
The invention also discloses a terrain grading device of the wind generating set, which comprises a data acquisition module, a terrain selection module, a concentric circle manufacturing module, a basic sector division module, an altitude calculation module, a basic sector terrain grading module and a regional terrain grading module; the output result of the data acquisition module is used as the input data of the terrain selection module, the output result of the terrain selection module is used as the input data of the concentric circle manufacturing module, the output result of the concentric circle manufacturing module is used as the input data of the basic sector dividing module, the output result of the basic sector dividing module is used as the input data of the altitude calculation module, the output result of the altitude calculation module is used as the input data of the basic sector terrain grading module, and the output result of the basic sector terrain grading module is used as the input data of the regional terrain grading module;
the data acquisition module is used for collecting a digital topographic map including a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting the model of the wind generating set and other parameters;
the terrain selection module is used for selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer;
the concentric circle manufacturing module is used for manufacturing a plurality of concentric circles with different radiuses by taking the wind generating set as the center in the circular digital map;
the basic sector division module is used for taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining a basic sector with 36 angles of 10 degrees;
the altitude calculation module is used for dividing each concentric circle into 2n arc lines by two adjacent rays in each basic sector, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines;
the basic sector terrain grading module is used for calculating an absolute difference value of the representative altitude of the adjacent arcs in each basic sector and judging the terrain grade of the basic sector according to the number of the difference values;
the regional terrain grading module is used for judging the terrain grade of a region to be analyzed of the wind generating set according to the terrain grade of each basic sector contained in the region.
The invention provides a method and a device for grading the terrain of a wind generating set. The method has the following beneficial effects: the purpose of comprehensively considering the influence of the topographic relief of the whole sector area is realized by adopting the difference between the representative altitude of the arc line in the sector area and the representative altitude of the adjacent arc line. Compared with the traditional terrain grading method, the method can obviously improve the accuracy of the calculation result.
Drawings
In order to more clearly illustrate the present invention or the prior art solutions, the drawings that are needed in the description of the prior art will be briefly described below.
FIG. 1 is a schematic flow chart illustrating an embodiment of the present invention;
FIG. 2 is a schematic diagram of map division in step 3 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the altitude represented on the arc line of step 5 in the embodiment of the present invention.
Fig. 4 is a block diagram of the terrain grading apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings.
Example one
As shown in fig. 1, a method and apparatus for grading a terrain of a wind turbine generator system includes the steps of:
step S1: collecting a digital topographic map including a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting relevant parameter information such as the type of the wind generating set; the center of the digital topographic map is a wind generating set to be analyzed, the periphery of the digital topographic map can be rectangular, circular or other shapes meeting the calculation requirement, the digital topographic map can be from measured data and public data, and the digital topographic map further comprises altitude data.
Step S2: selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer; wherein the selected digital map is further selected based on the digital topographic map in step S1.
Step S3: in a circular digital map, a wind generating set is taken as a center, and a plurality of concentric circles with different radiuses are made;
specifically, as shown in fig. 2, in this step, the number of concentric circles is not limited, and may be 2n concentric circles. If 2n concentric circles are formed, 2n concentric circles 202 are formed by taking the wind turbine generator set 201 as the center, with the first term being 1/2H and the last term being nH, and the arithmetic series with the tolerance being 1/2H as the radius.
Step S4: taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining a basic sector with 36 degrees of 10 degrees;
step S5: in each basic sector, dividing each concentric circle into 2n arc lines by two adjacent rays, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines;
specifically, as shown in fig. 3, the step S5 specifically includes the following steps:
step S51: in each basic sector, two adjacent rays divide each concentric circle into 2n arcs 302;
step S52: taking a plurality of reference points 307 on the arc according to the length of the arc; in this embodiment, the number of reference points on the same arc is not limited, and the number of reference points is determined according to the length of the arc;
step S53: and calculating the altitude of each reference point on the same arc, averaging, and taking the average as the representative altitude of the arc where the reference point is located.
Step S6: calculating absolute difference values of the representative altitude of adjacent arcs in each basic sector, and judging the terrain level of the basic sector according to the number of the difference values;
specifically, the step S6 specifically includes the following steps:
step S61: in the same basic sector, calculating the absolute difference d of the representative altitudes of adjacent arcsi＝|ei-ei-1L, |; wherein eiAnd ei-1Means the representative altitude of the adjacent arcs in the same basic sector;
step S62: the number of statistical absolute differences exceeds 0.05(D + H), the number of basic sectors is 0, the number of basic sectors is 1, the number of basic sectors is 2, the number of basic sectors is 3, and the number of basic sectors is 4; and D is the diameter of the wind wheel of the wind generating set.
Step S7: the terrain level of the area to be analyzed of the wind generating set is judged according to the terrain level of each basic sector contained in the area.
Specifically, the step S7 specifically includes the following steps:
step S71: determining all basic sectors contained in a region to be analyzed of the wind generating set;
step S72: counting the number of adjacent arcs in each basic sector, the absolute difference of the representative altitude exceeds 0.05(D + H), and the average value of the above numbers of all basic sectors included in the area to be analyzed, the terrain level with the average value of 0 is 0, the terrain level with the average value in the range of (0,15) is 1, the terrain level with the average value in the range of [15,30) is 2, the terrain level with the average value in the range of [30,45) is 3, and the terrain level with the average value in the range of [45, ∞) is 4.
Example two
As shown in fig. 4, the invention also discloses a terrain grading device for a wind generating set, which comprises a data acquisition module 401, a terrain selection module 402, a concentric circle making module 403, a basic sector division module 404, an altitude calculation module 405, a basic sector terrain grading module 406 and an area terrain grading module 407; the output result of the data acquisition module 401 is used as the input data of the terrain selection module 402, the output result of the terrain selection module 402 is used as the input data of the concentric circle making module 403, the output result of the concentric circle making module 403 is used as the input data of the basic sector division module 404, the output result of the basic sector division module 404 is used as the input data of the altitude calculation module 405, the output result of the altitude calculation module 405 is used as the input data of the basic sector terrain classification module 406, and the output result of the basic sector terrain classification module 406 is used as the input data of the regional terrain classification module 407;
the data acquisition module 401 is used for collecting a digital topographic map including a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting the model number and other parameters of the wind generating set;
the terrain selecting module 402 is used for selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer;
the concentric circle making module 403 is configured to make a plurality of concentric circles with different radiuses in the circular digital map, with the wind turbine generator set as the center;
the basic sector division module 404 is configured to take a ray every 10 degrees with the wind turbine generator set as a center, intersect each concentric circle, and obtain a basic sector with an angle of 36 degrees of 10 degrees;
the altitude calculation module 405 is configured to segment each concentric circle into 2n arc lines by two adjacent rays in each basic sector, and calculate an average value of the altitudes of areas where the arc lines are located, where the average value is used as a representative altitude of the arc lines;
the basic sector terrain grading module 406 is configured to calculate an absolute difference value of the representative altitude of adjacent arcs in each basic sector, and determine a terrain grade of the basic sector according to the number of the difference values;
the region terrain grading module 407 is used for judging the terrain grade of the region to be analyzed of the wind generating set according to the terrain grade of each basic sector contained in the region.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for grading the terrain of a wind turbine, characterized in that it comprises the following steps:
step S1: collecting a digital topographic map comprising a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting related parameter information of the wind generating set;
step S2: selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer;
step S3: in a circular digital map, a wind generating set is taken as a center, and a plurality of concentric circles with different radiuses are made;
step S4: taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining a basic sector with 36 degrees of 10 degrees;
step S5: in each basic sector, dividing each concentric circle into 2n arc lines by two adjacent rays, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines;
step S6: calculating absolute difference values of the representative altitude of adjacent arcs in each basic sector, and judging the terrain level of the basic sector according to the number of the difference values;
step S7: the terrain level of the area to be analyzed of the wind generating set is judged according to the terrain level of each basic sector contained in the area.
2. The method for terrain classification of a wind turbine generator system of claim 1, wherein said step S3 specifically includes the steps of: in a circular digital map, a wind generating set is taken as a center, the first item is 1/2H, the last item is nH, an arithmetic progression with a tolerance of 1/2H is taken as a radius, and 2n concentric circles are formed, wherein H is the height of a hub of the wind generating set, and n is a positive integer.
3. A method of terrain grading of a wind park according to claim 1, characterized in that: the step S5 specifically includes the following steps:
step S51: in each basic sector, two adjacent rays divide each concentric circle into 2n arc lines in total;
step S52: according to the length of the arc line, taking a plurality of reference points on the arc line;
step S53: and calculating the altitude of each reference point on the same arc, averaging, and taking the average as the representative altitude of the arc where the reference point is located.
4. A method of terrain grading of a wind park according to claim 1, characterized in that: the S6 specifically includes the following steps:
step S61: within the same basic sector, the representatives of adjacent arcs are calculatedAbsolute difference in altitude di＝|ei-ei-1L, |; wherein eiAnd ei-1Means the representative altitude of the adjacent arcs in the same basic sector;
step S62: the number of statistical absolute differences exceeds 0.05(D + H), the number of basic sectors is 0, the number of basic sectors is 1, the number of basic sectors is 2, the number of basic sectors is 3, and the number of basic sectors is 4; and D is the diameter of the wind wheel of the wind generating set.
5. A method of terrain grading of a wind park according to claim 4, characterized in that: the S7 specifically includes the following steps:
step S71: determining all basic sectors contained in a region to be analyzed of the wind generating set;
step S72: the number of absolute differences in the representative altitude of the adjacent arcs in each elementary sector exceeding 0.05(D + H) and the average of the above numbers of all elementary sectors included in the area to be analyzed are counted, the terrain level of the average value 0 is 0, the terrain level of the average value in the range of (0,15) is 1, the terrain level of the average value in the range of [15,30) is 2, the terrain level of the average value in the range of [30,45) is 3, and the terrain level of the average value in the range of [45, ∞) is 4.
6. A terrain grading device for wind turbines as claimed in claim 1, characterized in that: the system comprises a data acquisition module, a terrain selection module, a concentric circle manufacturing module, a basic sector division module, an altitude calculation module, a basic sector terrain grading module and a regional terrain grading module; the output result of the data acquisition module is used as the input data of the terrain selection module, the output result of the terrain selection module is used as the input data of the concentric circle manufacturing module, the output result of the concentric circle manufacturing module is used as the input data of the basic sector dividing module, the output result of the basic sector dividing module is used as the input data of the altitude calculation module, the output result of the altitude calculation module is used as the input data of the basic sector terrain grading module, and the output result of the basic sector terrain grading module is used as the input data of the regional terrain grading module;
the data acquisition module is used for collecting a digital topographic map comprising a wind generating set to be analyzed, a wind power plant where the wind generating set is located and other designated areas, and collecting the model of the wind generating set and other parameters;
the terrain selection module is used for selecting a digital map of a circular range with a wind generating set as a center and n times of hub height H as a radius, wherein n is a positive integer;
the concentric circle manufacturing module is used for manufacturing a plurality of concentric circles with different radiuses by taking the wind generating set as the center in the circular digital map;
the basic sector division module is used for taking a wind generating set as a center, making a ray every 10 degrees, respectively intersecting with each concentric circle, and obtaining a basic sector with 36 degrees of 10 degrees;
the altitude calculation module is used for dividing each concentric circle into 2n arc lines by two adjacent rays in each basic sector, and calculating the average value of the altitude of the area where the arc lines are located to serve as the representative altitude of the arc lines;
the basic sector terrain grading module is used for calculating an absolute difference value of the representative altitude of the adjacent arcs in each basic sector and judging the terrain grade of the basic sector according to the number of the difference values;
the regional terrain grading module is used for judging the terrain grade of a region to be analyzed of the wind generating set according to the terrain grade of each basic sector contained in the region.
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| CN117212045B (en) * | 2022-06-30 | 2024-07-23 | 北京金风科创风电设备有限公司 | Method and device for determining turbulence intensity at wind generating set |
| CN116611961B (en) * | 2023-07-21 | 2023-12-19 | 电子科技大学中山学院 | Micro site selection and fan selection collaborative optimization method for offshore wind farm |
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