Fan blade slope collision detection and elimination method and calculation device

Abstract

The embodiment of the invention discloses a fan blade slope collision detection and elimination method and a calculation device. The method comprises the following steps: collecting information, wherein the information comprises unit coordinates, unit parameters and a surveying and mapping topographic map which need to be subjected to site selection risk assessment; extracting data from the information, wherein the data comprises a preselected fan point location, a blade length and a slope profile; establishing a coordinate system according to the extracted data; judging whether slope collision occurs or not according to the coordinate system; if yes, the limit gradient is calculated, and mountain digging is carried out according to the limit gradient so as to eliminate the fan blade side slope collision. Compared with the prior art, for the collision risk problem of the fan blade and the slope, a systematic inspection and elimination scheme does not exist at present, the embodiment of the invention just fills the blank, and the safety problem of fan operation can be eliminated.

Description

Technical Field

[0001] The invention belongs to the field of wind power generation design and engineering technology, and in particular relates to a method and a computing device for detecting and eliminating wind turbine blade slope collisions that may be caused by high slope terrain. Background Art

[0002] In order to accelerate the realization of the dual carbon goals, my country's wind power industry has developed rapidly. With the vigorous development of wind power projects in plain areas, and considering that there are also a large number of areas with rich wind resources in mountains and hills, more and more new wind power projects have chosen complex terrains such as ridges, valleys, passes and cliffs. Some wind turbine platforms in complex terrain are inevitably built next to high slopes. The high slope terrain is steep, which not only affects the wind speed and wind direction distribution of the wind farm, but also brings great obstacles to the transportation and installation of wind turbines, as well as the stability and safe operation of wind turbine structures, thus having a negative impact on the power generation efficiency and operational safety of wind turbines. Therefore, this puts forward certain requirements for the design of wind farms.

[0003] At present, the relevant technologies focus on the impact of high slopes on wind resources and turbulence intensity, and focus on the evaluation of wind turbine power generation benefits. This technology first determines the pre-selected machine sites that need to be supplemented with site selection risk assessments; then maps the micro-topography elevation data around the wind turbine sites where high slopes occur, measures the roughness distribution data within the micro-topography range, and performs refined calculations and analysis on the important wind parameters of the complete annual wind measurement data; then, based on the data obtained in the above steps, the wind resource distribution data of the pre-selected machine sites is refined modeled and calculated; finally, the impact of high slope terrain on the power generation of wind turbines at the pre-selected machine sites is further evaluated based on the calculation results. On the other hand, the relevant technologies involve the construction of wind turbine platforms on high slopes and the construction operations of slope stability. This type of technology is related to the construction method of wind turbine installation platforms in mountaintop wind farms. This technology divides the area where the wind turbine installation platform is located into an excavation area and a filling area. First, a retaining wall is constructed; then the platform is excavated, the top of the mountain where the excavation area is located is excavated downward to the set elevation, and the excavated soil and rocks are buried in the filling area.

[0004] When there is a slope next to the pre-selected wind turbine location, the wind turbine operation is very likely to be negatively affected. The current technology on the impact of high slope terrain mainly focuses on its interference with the flow field. However, an important point that needs to be considered after the wind turbine location is determined and before construction is whether the slope will collide with the blades. Existing technologies do not discuss this issue much. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a method and a computing device for detecting and eliminating wind turbine blade slope collisions, so as to eliminate safety issues in wind turbine operation.

[0006] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a method for detecting and eliminating wind turbine blade slope collisions, comprising:

[0007] Collect information including unit coordinates, unit parameters and topographic maps required for site risk assessment;

[0008] Extracting data from the information, the data including pre-selected wind turbine location, hub height, blade length, and slope profile;

[0009] Establishing a coordinate system based on the extracted data;

[0010] Determining whether a slope collision occurs according to the coordinate system;

[0011] If it occurs, the limit slope is calculated, and the mountain is excavated according to the limit slope to eliminate the collision of the wind turbine blades with the slope.

[0012] As a specific implementation of the present application, data is extracted from the information, specifically:

[0013] Determine the slope section closest to the wind turbine through the top view. The plane where the section is located must pass through the pre-selected wind turbine location.

[0014] As a specific implementation of the present application, a coordinate system is established according to the extracted data, specifically:

[0015] A two-dimensional coordinate system is established with the surface of the slope section as the plane and the pre-selected wind turbine point as the origin;

[0016] The coordinates of the edge of the impeller swept surface can be determined by the fan hub height H and the blade length r;

[0017] The slope profile obtained based on field surveying is presented in the coordinate system as N discrete points with equal spacing in the ordinate, and the height difference between two discrete points is δz; the coordinates of the i-th (1≤i≤N) point can be expressed as is the horizontal distance between this point and the fan position, z i is the vertical distance between this point and the fan position, where:

[0018] z i =(i-1)δz

[0019]

[0020] As a specific implementation of the present application, judging whether a slope collision occurs according to the coordinate system is as follows:

[0021] If exists 1≤i≤N, then slope collision will occur;

[0022] Among them, each height z i The horizontal coordinates of the edge of the impeller swept surface are and the horizontal coordinate of the slope profile

[0023] The limiting slope is calculated by the following formula:

[0024] θ=180°-α-β

[0025]

[0026]

[0027] Among them, H is the hub height, r is the blade length or impeller radius; the altitude at the machine position coordinate is taken as the reference plane, d is the horizontal distance between the wind turbine point and the slope on the plane, if the machine position, slope and reference plane intersect at the same point, then d = 0, otherwise d> 0; θ is the limit slope, α is the angle formed by the line connecting the hub and the foot of the mountain and the reference plane, β is the angle formed by the line connecting the hub and the foot of the mountain and the straight line where the limit slope is located, θ, α and β as well as the angles in the formula and the results of inverse trigonometric functions are all expressed in degrees.

[0028] In a second aspect, an embodiment of the present invention provides a computing device for detecting and eliminating wind turbine blade slope collisions, comprising:

[0029] A collection unit, used for collecting information, the information including the unit coordinates, unit parameters and surveying and mapping topographic maps required for site selection risk assessment;

[0030] an extraction unit, for extracting data from the information, the data including pre-selected wind turbine point location, hub height, blade length and slope profile;

[0031] A coordinate system establishing unit, used for establishing a coordinate system according to the extracted data;

[0032] A collision detection unit, used for determining whether a slope collision occurs according to the coordinate system;

[0033] The collision elimination unit is used to calculate the limit slope if it occurs, and to dig the mountain according to the limit slope to eliminate the wind turbine blade slope collision.

[0034] In a third aspect, an embodiment of the present invention further provides a computing device for detecting and eliminating wind turbine blade slope collisions, comprising a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, wherein the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method of the first aspect above.

[0035] By implementing the embodiments of the present invention, information is collected to extract data such as pre-selected wind turbine locations, blade lengths, and slope profiles, a coordinate system is established based on the extracted data, and a determination is made based on the coordinate system as to whether a slope collision occurs. If so, an elimination plan is implemented, thereby eliminating safety issues with wind turbine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0037] Figure 1 is a flow chart of a method for detecting and eliminating wind turbine blade slope collisions provided by an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the wind turbine and slope position;

[0039] Figure 3 It is a structural diagram of a computing device for detecting and eliminating wind turbine blade slope collisions provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0042] Please refer to Figure 1 , is a method for detecting and eliminating wind turbine blade slope collisions provided by an embodiment of the present invention, comprising the following steps:

[0043] S1, collect information.

[0044] Specifically, the unit coordinates (National 2000 coordinates, projection type, degree band number), unit parameters (tower and blade size information) and surveying topographic maps (1:2000 or higher resolution topographic maps) required for site risk assessment are collected.

[0045] S2, extract data from the information.

[0046] Among other things, the data includes pre-selected wind turbine locations, blade lengths and slope profiles.

[0047] Specifically, obtain the hub height and blade length of the pre-selected wind turbine; survey the topography around the pre-selected wind turbine site and the slope to obtain the slope profile data; determine the slope section closest to the wind turbine through the top view, the plane where the section is located must pass through the wind turbine site, select the profile data of this section and proceed to the following steps.

[0048] S3, establishing a coordinate system according to the extracted data.

[0049] A two-dimensional coordinate system is established with the slope section as the plane and the pre-selected wind turbine point as the origin, such as Figure 2 As shown. The x-axis direction of this coordinate system does not correspond to the longitude and latitude directions in the real map, and coordinate conversion is required, that is, the real coordinates of the machine position and slope profile are projected to this direction. The coordinates of the edge of the impeller swept surface can be determined by the wind turbine hub height H and the blade length r. The slope profile obtained based on on-site surveying is presented in the coordinate system as N discrete points with equal spacing in the vertical coordinate (the value of N can be reasonably determined based on the resolution of the adopted terrain), and the height difference between the two points is δz; the coordinates of the i-th (1≤i≤N) point can be expressed as is the horizontal distance between this point and the fan position, z i is the vertical distance between this point and the fan position, where:

[0050] z i =(i-1)δz; (1)

[0051]

[0052] S4, judging whether a slope collision occurs according to the coordinate system.

[0053] Each height z i The horizontal coordinates of the edge of the impeller swept surface are and the horizontal coordinate of the slope profile Since the impeller swept surface is circular, at a certain height z i There are two corresponding horizontal axes. The absolute values ​​of the two are equal and opposite in sign. The horizontal coordinate far from the slope is negative. The horizontal coordinate is positive near the slope. When making subsequent judgments, a positive horizontal coordinate close to the slope should be selected. The slope and the blade collide, that is, there is an overlap area between the slope and the impeller swept surface, which is manifested in the coordinate system as the positive horizontal coordinate of the edge of the impeller swept surface being greater than the horizontal coordinate of the slope profile. In other words, if the following judgment formula (3) is satisfied, a slope collision will occur:

[0054] exist

[0055] S5, if it occurs, the limit slope is calculated, and the mountain is excavated according to the limit slope to eliminate the collision of the wind turbine blade slope.

[0056] If the existence of slope collision is confirmed after the first four steps, the fifth step - eliminating slope collision will be carried out. That is, a limit slope is proposed at which slope collision will not occur, and the part of the slope with a slope greater than the limit slope is excavated. After excavating to the upper blade tip height (H+r), it will naturally connect with the original mountain to avoid the formation of artificial high slopes.

[0057] The limiting slope is the slope that makes the slope profile exactly tangent to the edge of the impeller swept surface; it should be noted that in actual applications, the tangency of the two will still cause the blades to be worn due to friction. Therefore, in addition to the limitation of the limiting slope, a gap of several meters needs to be reserved between the slope and the impeller swept surface during actual construction.

[0058] The limiting slope θ can be obtained by formulas (4) to (6):

[0059] θ=180°-α-β; (4)

[0060]

[0061]

[0062] Among them, H is the hub height, r is the blade length or impeller radius; the altitude at the machine coordinate is taken as the reference plane, d is the horizontal distance between the wind turbine point and the slope on the plane, if the machine point, slope and reference plane intersect at the same point, then d = 0, otherwise d> 0; θ is the limit slope, α is the angle formed by the line connecting the hub and the foot of the mountain and the reference plane, β is the angle formed by the line connecting the hub and the foot of the mountain and the straight line where the limit slope is located, θ, α and β as well as the angles in the formula and the results of inverse trigonometric functions are all uniformly expressed in degrees (can also be uniformly expressed in radians). The meanings of all angles and distances are marked in Figure 2 middle.

[0063] By implementing the technical solution provided in the embodiment of the present invention, information is collected to extract data such as pre-selected wind turbine positions, blade lengths, and slope profiles, a coordinate system is established based on the extracted data, and a determination is made based on the coordinate system as to whether a slope collision occurs. If so, an elimination plan is implemented to eliminate safety issues in wind turbine operation.

[0064] Based on the same inventive concept, an embodiment of the present invention provides a computing device for detecting and eliminating wind turbine blade slope collisions, comprising:

[0065] A collection unit, used for collecting information, the information including the unit coordinates, unit parameters and surveying and mapping topographic maps required for site selection risk assessment;

[0066] An extraction unit, for extracting data from the information, the data including pre-selected wind turbine locations, blade lengths and slope profiles;

[0067] A coordinate system establishing unit, used for establishing a coordinate system according to the extracted data;

[0068] A collision detection unit, used for determining whether a slope collision occurs according to the coordinate system;

[0069] The collision elimination unit is used to calculate the limit slope if it occurs, and to dig the mountain according to the limit slope to eliminate the wind turbine blade slope collision.

[0070] It should be noted that the specific working process of this embodiment can be found in the aforementioned method embodiment part, which will not be described in detail here.

[0071] Furthermore, another embodiment of the present invention also provides a computing device for detecting and eliminating wind turbine blade slope collisions. As shown in the figure, the device may include: one or more processors 101, one or more input devices 102, one or more output devices 103 and a memory 104, wherein the processors 101, the input devices 102, the output devices 103 and the memory 104 are interconnected via a bus 105. The memory 104 is used to store a computer program, wherein the computer program includes program instructions, and the processor 101 is configured to call the program instructions to execute the method of the above method embodiment.

[0072] It should be understood that in the embodiment of the present invention, the processor 101 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0073] The input device 102 may include a keyboard, etc., and the output device 103 may include a display (LCD, etc.), a speaker, etc.

[0074] The memory 104 may include a read-only memory and a random access memory, and provides instructions and data to the processor 101. A portion of the memory 104 may also include a non-volatile random access memory. For example, the memory 104 may also store information on the device type.

[0075] In a specific implementation, the processor 101, input device 102, and output device 103 described in the embodiment of the present invention can execute the implementation method described in the embodiment of the wind turbine blade slope collision detection and elimination method provided in the embodiment of the present invention, which will not be repeated here.

[0076] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0077] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0078] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for detecting and eliminating wind turbine blade slope collision, characterized in that: include: Collect information including unit coordinates, unit parameters and topographic maps required for site risk assessment; Extracting data from the information, the data including pre-selected wind turbine location, hub height, blade length, and slope profile; Establishing a coordinate system based on the extracted data; Determining whether a slope collision occurs according to the coordinate system; If it occurs, the limit slope is calculated, and the mountain is excavated according to the limit slope to eliminate the collision of the wind turbine blades with the slope.

2. The method according to claim 1, characterized in that Extract data from said information, specifically: Determine the slope section closest to the wind turbine through the top view. The plane where the section is located must pass through the pre-selected wind turbine location.

3. The method according to claim 2, characterized in that Establish a coordinate system based on the extracted data, specifically: A two-dimensional coordinate system is established with the surface of the slope section as the plane and the pre-selected wind turbine point as the origin; The coordinates of the edge of the impeller swept surface can be determined by the fan hub height H and the blade length r; The slope profile obtained based on field surveying is presented in the coordinate system as N discrete points with equal spacing in the ordinate, and the height difference between two discrete points is δz; the coordinates of the i-th (1≤i≤N) point can be expressed as is the horizontal distance between this point and the fan position, z i is the vertical distance between this point and the fan position, where: z i =(i-1)δz 4. The method according to claim 3, characterized in that Whether a slope collision occurs is determined according to the coordinate system, specifically: If exists Slope collision will occur; Among them, each height z i The horizontal coordinates of the edge of the impeller swept surface are and the horizontal coordinate of the slope profile 5. The method according to claim 1, characterized in that The limiting slope is calculated using the following formula: θ=180°-α-β Among them, H is the hub height, r is the blade length or impeller radius; the altitude at the machine position coordinate is taken as the reference plane, d is the horizontal distance between the wind turbine point and the slope on the plane, if the machine position, slope and reference plane intersect at the same point, then d = 0, otherwise d> 0; θ is the limit slope, α is the angle formed by the line connecting the hub and the foot of the mountain and the reference plane, β is the angle formed by the line connecting the hub and the foot of the mountain and the straight line where the limit slope is located, θ, α and β as well as the angles in the formula and the results of inverse trigonometric functions are all expressed in degrees.

6. A computing device for detecting and eliminating wind turbine blade slope collisions, characterized in that: include: A collection unit, used for collecting information, the information including the unit coordinates, unit parameters and surveying and mapping topographic maps required for site selection risk assessment; an extraction unit, for extracting data from the information, the data including pre-selected wind turbine point location, hub height, blade length and slope profile; A coordinate system establishing unit, used for establishing a coordinate system according to the extracted data; A collision detection unit, used for determining whether a slope collision occurs according to the coordinate system; The collision elimination unit is used to calculate the limit slope if it occurs, and to dig the mountain according to the limit slope to eliminate the wind turbine blade slope collision.

7. The computing device according to claim 6, wherein: The coordinate system establishing unit is specifically used for: A two-dimensional coordinate system is established with the surface of the slope section as the plane and the pre-selected wind turbine point as the origin; The coordinates of the edge of the impeller swept surface can be determined by the fan hub height H and the blade length r; The slope profile obtained based on field surveying is presented in the coordinate system as N discrete points with equal spacing in the ordinate, and the height difference between two discrete points is δz; the coordinates of the i-th (1≤i≤N) point can be expressed as is the horizontal distance between this point and the fan position, z i is the vertical distance between this point and the fan position, where: z i =(i-1)δz 8. The computing device according to claim 7, wherein: The collision detection unit is specifically used for: If exists Slope collision will occur; Among them, each height z i The horizontal coordinates of the edge of the impeller swept surface are and the horizontal coordinate of the slope profile 9. The computing device of claim 6, wherein: The limiting slope is calculated using the following formula: θ=180°-α-β Among them, H is the hub height, r is the blade length or impeller radius; the altitude at the machine position coordinate is taken as the reference plane, d is the horizontal distance between the wind turbine point and the slope on the plane, if the machine position, slope and reference plane intersect at the same point, then d = 0, otherwise d> 0; θ is the limit slope, α is the angle formed by the line connecting the hub and the foot of the mountain and the reference plane, β is the angle formed by the line connecting the hub and the foot of the mountain and the straight line where the limit slope is located, θ, α and β as well as the angles in the formula and the results of inverse trigonometric functions are all expressed in degrees.

10. A computing device for detecting and eliminating wind turbine blade slope collisions, characterized in that: The method comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method according to any one of claims 1 to 5.

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