Plasma position adjusting method and device and wind power generation system

Abstract

The invention discloses a plasma position determination method and device and a wind driven generator system. The method comprises the steps that wind wheel pneumatic data of a wind wheel are obtained, the wind wheel comprises at least two blades, and the wind wheel pneumatic data comprise attribute parameter data of the wind wheel; the flow separation position of the blade surface of each blade in the wind wheel is determined according to the wind wheel pneumatic data; according to the flow separation position of the blade surface, the arrangement position of the plasma to be laid on the blade surface is determined; and corresponding plasmas are arranged at the arrangement positions on the surfaces of the blades. The technical problem that the power generation efficiency of the wind generating set is low due to the fact that defects exist in the structural design of the wind generating set is solved.

Description

Technical Field

[0001] The present application relates to the field of energy control, and in particular, to a method and device for determining the position of plasma and a wind turbine generator system. Background Art

[0002] With the development of science and technology, wind energy, as a clean and renewable energy source, is increasingly being used in the power industry. However, wind turbines used to collect wind energy have high maintenance costs due to the particularity of their working environment. Therefore, in order to save maintenance costs, it is necessary to improve the operating reliability of wind turbines.

[0003] At present, the vertical axis wind turbines commonly used in wind turbines have the advantages of low wind speed starting characteristics, simple structure and installation, easy maintenance and operation, long maintenance cycle, low power generation cost, etc., so they have good application prospects in wind power generation. However, there are many problems with existing vertical axis wind turbines, such as: 1) Under low wind conditions, the power output of wind turbines is low, which limits the wind energy conversion efficiency of offshore vertical axis wind turbines; 2) Under high wind conditions, the blades of wind turbines will stall, causing the blades to produce large vibrations and noise, affecting the safe operation of wind farms.

[0004] That is to say, the structural design of the wind turbine generator set provided by the prior art has certain defects, which leads to the problem of low power generation efficiency of the wind turbine generator set.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present application provide a plasma position determination method and device and a wind turbine system to at least solve the technical problem of low power generation efficiency of the wind turbine caused by defects in the structural design of the wind turbine.

[0007] According to one aspect of an embodiment of the present application, a method for determining the position of plasma is provided, comprising: acquiring aerodynamic data of a wind wheel, wherein the wind wheel comprises at least two blades, and the aerodynamic data of the wind wheel comprises attribute parameter data of the wind wheel and attribute parameter data of the blades; determining a flow separation position on a blade surface of each of the blades in the wind wheel according to the aerodynamic data of the wind wheel; determining a layout position on the blade surface where plasma will be laid according to the flow separation position on the blade surface; and arranging corresponding plasma at the layout position on the blade surface.

[0008] As an optional embodiment, the above-mentioned determination of the flow separation position on the blade surface of each of the blades in the wind wheel based on the above-mentioned wind wheel aerodynamic data includes: calculating the wind wheel solidity of the above-mentioned wind wheel using the above-mentioned wind wheel aerodynamic data; calculating the wind wheel aerodynamic efficiency of the above-mentioned wind wheel based on the above-mentioned wind wheel aerodynamic data and the above-mentioned wind wheel solidity; obtaining surface wind flow data collected from the blade surface of each of the above-mentioned blades at the rated wind speed of the above-mentioned wind wheel; determining the flow separation position on the blade surface of each of the above-mentioned blades based on the above-mentioned wind wheel solidity, the above-mentioned wind wheel aerodynamic efficiency and the above-mentioned surface wind flow data of each of the above-mentioned blades.

[0009] As an optional implementation, the above-mentioned method of calculating the wind wheel solidity of the wind wheel using the above-mentioned wind wheel aerodynamic data includes: obtaining the wind wheel height and the wind wheel radius of the above-mentioned wind wheel from the attribute parameter data of the above-mentioned wind wheel, and obtaining the number of blades and the blade chord length from the attribute parameter data of the above-mentioned blades; calculating the swept area of ​​the above-mentioned wind wheel based on the above-mentioned wind wheel height and the above-mentioned wind wheel radius; calculating the above-mentioned wind wheel solidity of the above-mentioned wind wheel based on the above-mentioned number of blades, the above-mentioned blade chord length, the above-mentioned wind wheel height and the above-mentioned swept area.

[0010] As an optional embodiment, the above-mentioned determination of the arrangement position at which the plasma will be laid on the surface of the blade according to the flow separation position on the surface of the blade includes: calculating the wind energy currently collected by the wind wheel according to the air density of the area where the wind wheel is located, the rated wind speed of the wind wheel and the swept area of ​​the wind wheel; determining the size information of the plasma to be laid on the surface of the blade according to the wind energy currently collected by the wind wheel, wherein the size information of the plasma includes the length, height and width of the plasma; and determining the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the surface of the blade.

[0011] As an optional embodiment, after the candidate arrangement position of the plasma is determined based on the size information of the plasma and the flow separation position on the surface of the blade, the method further includes: arranging plasma at the candidate arrangement position of the plasma on the blade surface of the blade; verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position to obtain a first verification result parameter; when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma meets a preset aerodynamic unloading condition, determining the candidate arrangement position as the arrangement position of the plasma.

[0012] As an optional embodiment, after verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position to obtain the first verification result parameter, it also includes: when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition, adjusting the arrangement position of the plasma according to the flow separation position on the blade surface to obtain the updated arrangement position; verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the updated arrangement position to obtain the second verification result parameter; when the second verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition, determining the updated arrangement position as the arrangement position of the plasma.

[0013] As an optional embodiment, after arranging the plasma at the candidate arrangement position of the plasma on the blade surface of the blade, it also includes: obtaining the wind wheel power of the wind wheel at a set wind speed, wherein the set wind speed is less than or equal to the maximum wind speed threshold that the wind wheel can withstand; determining the power curve of the wind wheel according to the set wind speed and the wind wheel power at the set wind speed, wherein the power curve is used to represent the power of the wind wheel at different wind speeds; and determining the aerodynamic unloading effect of the plasma according to the power curve.

[0014] According to another aspect of an embodiment of the present application, a plasma position determination device is also provided, including: an acquisition unit, used to acquire aerodynamic data of a wind wheel, wherein the wind wheel includes at least two blades, and the aerodynamic data of the wind wheel includes attribute parameter data of the wind wheel and attribute parameter data of the blades; a first determination unit, used to determine the flow separation position on the blade surface of each of the blades in the wind wheel according to the aerodynamic data of the wind wheel; a second determination unit, used to determine the arrangement position on the blade surface where the plasma will be laid according to the flow separation position on the blade surface; and an arrangement unit, used to arrange the corresponding plasma at the arrangement position on the blade surface.

[0015] As an optional embodiment, the above-mentioned first determination unit includes: a first calculation module, used to calculate the wind wheel solidity of the above-mentioned wind wheel using the above-mentioned wind wheel aerodynamic data; a second calculation module, used to calculate the wind wheel aerodynamic efficiency of the above-mentioned wind wheel based on the above-mentioned wind wheel aerodynamic data and the above-mentioned wind wheel solidity; a first acquisition module, used to obtain surface wind flow data collected from the blade surface of each of the above-mentioned blades at the rated wind speed of the above-mentioned wind wheel; a first determination module, used to determine the flow separation position on the blade surface of each of the above-mentioned blades based on the above-mentioned wind wheel solidity, the above-mentioned wind wheel aerodynamic efficiency and the above-mentioned surface wind flow data of each of the above-mentioned blades.

[0016] As an optional implementation, the first calculation module includes: an acquisition submodule, used to acquire the wind wheel height and wind wheel radius of the wind wheel from the attribute parameter data of the wind wheel, and acquire the number of blades and the blade chord length from the attribute parameter data of the blades; a first calculation submodule, used to calculate the swept area of ​​the wind wheel based on the wind wheel height and the wind wheel radius; a second calculation submodule, used to calculate the wind wheel solidity of the wind wheel based on the number of blades, the blade chord length, the wind wheel height and the swept area.

[0017] As an optional implementation, the second determination unit includes: a third calculation module, used to calculate the wind energy currently collected by the wind wheel according to the air density of the area where the wind wheel is located, the rated wind speed of the wind wheel and the swept area of ​​the wind wheel; a second determination module, used to determine the size information of the plasma to be laid on the blade surface according to the wind energy currently collected by the wind wheel, wherein the size information of the plasma includes the length, height and width of the plasma; a third determination module, used to determine the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the blade surface.

[0018] As an optional embodiment, the second determination unit further includes: an arrangement module, for arranging plasma at the candidate arrangement position of the plasma on the blade surface of the blade after determining the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the blade surface; a first verification module, for verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position to obtain a first verification result parameter; and a fourth determination module, for determining the candidate arrangement position as the arrangement position of the plasma when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma meets a preset aerodynamic unloading condition.

[0019] As an optional embodiment, the second determination unit further includes: an adjustment module for verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position to obtain a first verification result parameter, and when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition, adjusting the arrangement position of the plasma according to the flow separation position on the blade surface to obtain the updated arrangement position; a second verification module for verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the updated arrangement position to obtain a second verification result parameter; and a fifth determination module for determining the updated arrangement position as the arrangement position of the plasma when the second verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition.

[0020] As an optional embodiment, the second determination unit further includes: a second acquisition module, used to acquire the wind wheel power of the wind wheel at a set wind speed after arranging the plasma at the candidate arrangement position of the plasma on the blade surface of the blade, wherein the set wind speed is less than or equal to the maximum wind speed threshold that the wind wheel can withstand; a sixth determination module, used to determine the power curve of the wind wheel according to the set wind speed and the wind wheel power at the set wind speed, wherein the power curve is used to represent the power of the wind wheel at different wind speeds; a seventh determination module, used to determine the aerodynamic unloading effect of the plasma according to the power curve.

[0021] According to another aspect of an embodiment of the present application, a wind turbine system is also provided, comprising: a wind wheel comprising at least two blades, each blade having the plasma whose arrangement position is determined by the above method applied on its surface; and a wind turbine generator set for converting the collected wind energy into electrical energy.

[0022] As an optional implementation, the wind turbine system further comprises: a plasma flow control device for controlling and adjusting the arrangement positions of at least two of the plasma conductors on the blade surface.

[0023] In an embodiment of the present application, after obtaining the aerodynamic data of the wind wheel, the flow separation position on the blade surface of each blade in the wind wheel is determined according to the aerodynamic data of the wind wheel, wherein the wind wheel includes at least two blades, and the aerodynamic data of the wind wheel includes the attribute parameter data of the above-mentioned wind wheel and the attribute parameter data in the above-mentioned blades; according to the flow separation position on the above-mentioned blade surface, the arrangement position where the plasma will be laid on the blade surface is determined, and the corresponding plasma is arranged at the arrangement position on the above-mentioned blade surface, so as to achieve the purpose of filling the defects in the structure of the wind turbine generator set by the plasma laid on the blade surface, thereby achieving the effect of adjusting the aerodynamic characteristics of the wind turbine blades under different wind speeds by controlling the flow of plasma, and improving the power generation efficiency of the wind turbine generator set, thereby solving the technical problem of low power generation efficiency of the wind turbine generator set caused by defects in the structural design of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 is a flow chart of an optional method for determining the position of plasma according to an embodiment of the present application;

[0026] Figure 2 is a flow chart of another optional method for determining the position of plasma according to an embodiment of the present application;

[0027] Figure 3 is a flow chart of another optional method for determining the position of plasma according to an embodiment of the present application;

[0028] Figure 4 is a flow chart of another optional method for determining the position of plasma according to an embodiment of the present application;

[0029] Figure 5 is a schematic structural diagram of an optional plasma position determination device according to an embodiment of the present application;

[0030] Figure 6 It is a schematic structural diagram of an optional wind turbine system according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] It should be noted that the method for determining the position of plasma provided in the embodiments of the present application will involve the following technical terms:

[0034] Plasma flow control (PFC) technology changes the flow characteristics of fluids by injecting plasma into the fluid flow channel to change the distribution of the channel flow field. Plasma flow control technology has been widely used in the fields of shipbuilding, aerospace, energy utilization, environmental science, etc. The application of plasma flow control technology in offshore wind power generation can effectively improve the aerodynamic performance of wind turbine blades and improve the operating efficiency of wind turbines.

[0035] According to one aspect of an embodiment of the present application, a method for determining the position of a plasma is provided, such as Figure 1 As shown, the method includes:

[0036] S102, obtaining aerodynamic data of a wind rotor, wherein the wind rotor includes at least two blades, and the aerodynamic data of the wind rotor includes attribute parameter data of the wind rotor and attribute parameter data of the blades.

[0037] Optionally, in this embodiment, the attribute parameter data of the wind rotor may include but are not limited to the structural parameters of the wind rotor, the wind turbine operating parameters of the wind turbine where the wind rotor is located, etc. Among them, the structural parameters of the wind rotor may include but are not limited to the height of the wind rotor, the radius of the wind rotor, the type of the wind rotor, etc., and the type of the wind rotor here may include but are not limited to the horizontal axis wind rotor, the vertical axis wind rotor, etc. The wind turbine operating parameters may include but are not limited to the rated power and rated wind speed of the wind turbine where the wind rotor is located.

[0038] In addition, in this embodiment, the attribute parameter data of the blade may include but are not limited to blade geometric parameters, blade material properties, etc. Among them, the blade geometric parameters may include but are not limited to the blade length, blade chord length, blade airfoil, etc. The blade material properties may include but are not limited to the blade material type, the density of the blade material, the fatigue strength of the blade material, etc. The parameter types listed here are all examples, and this embodiment does not limit this.

[0039] S104, determining the flow separation position on the blade surface of each blade in the wind rotor according to the wind rotor aerodynamic data.

[0040] Optionally, in this embodiment, the flow separation position on the blade surface can be, but is not limited to, obtained by calculation using the aerodynamic data of the wind rotor. After obtaining the aerodynamic data of the wind rotor, the aerodynamic characteristic parameters of the wind rotor are calculated according to the aerodynamic data of the wind rotor, and the flow conditions on the blade surface are analyzed for each blade in the wind rotor by combining the aerodynamic characteristic parameters of the wind rotor with the wind condition parameters of the environment in which the wind rotor is located, so as to determine the flow separation position on the blade surface of each blade in the wind rotor according to the aerodynamic data of the wind rotor. Here, the flow separation position on the blade surface refers to the position on the blade of the wind turbine generator where the airflow separates from the blade surface.

[0041] It should be noted that the above-mentioned aerodynamic characteristic parameters of the wind wheel may include but are not limited to the swept area of ​​the wind wheel, the solidity of the wind wheel, the aerodynamic efficiency of the wind wheel, etc., and the wind condition parameters of the environment in which the above-mentioned wind wheel is located may include but are not limited to the wind speed and wind direction of the environment in which the wind wheel is located. The flow conditions on the surface of the above-mentioned blades may be, but are not limited to, obtained based on the aerodynamic characteristic parameters of the wind wheel and the wind condition parameters of the environment in which the wind wheel is located, using existing gas flow observation technology. Among them, the existing gas flow observation technology may be particle image velocimetry technology. Particle image velocimetry technology is a non-invasive measurement technology. By releasing small particles in a wind tunnel experiment and recording their movement trajectory, the gas flow conditions around the blades of the wind turbine can be intuitively observed.

[0042] That is to say, in the present embodiment, the flow separation position on the surface of the blade may be, but is not limited to, obtained by calculating the aerodynamic characteristic parameters of the wind wheel through the acquired aerodynamic data of the wind wheel, and combining the aerodynamic characteristic parameters of the wind wheel with the wind condition parameters of the environment in which the wind wheel is located, and using gas flow observation technology to analyze the flow conditions of the gas on the blade surface under different wind conditions, thereby being able to analyze the flow separation position on the blade surface under different wind conditions based on the gas flow conditions.

[0043] S106, determining the arrangement position where the plasma will be laid on the blade surface according to the flow separation position on the blade surface.

[0044] Optionally, in this embodiment, the arrangement position where the plasma will be laid on the blade surface can be, but is not limited to, calculated based on the wind speed and aerodynamic characteristic parameters of the wind wheel under different wind conditions to obtain the wind energy collected in the current environment of the wind wheel, and the size information of the plasma to be laid on the blade surface is determined based on the wind energy, thereby combining the flow separation position on the blade surface with the size information of the plasma to determine the arrangement position where the plasma will be laid on the blade surface. The size information of the plasma can include, but is not limited to, the length, width, height, etc. of the plasma.

[0045] S108, arranging corresponding plasma at the arrangement position on the blade surface.

[0046] Optionally, in this embodiment, according to the arrangement position of the blade surface and the size information of the plasma, the plasma is laid at the corresponding position on the blade surface, thereby filling the structural defects of the wind turbine with the plasma.

[0047] Through the embodiments provided by the present application, after obtaining the aerodynamic data of the wind wheel, the flow separation position on the blade surface of each blade in the wind wheel is determined according to the aerodynamic data of the wind wheel, wherein the wind wheel includes at least two blades, and the aerodynamic data of the wind wheel includes the attribute parameter data of the above-mentioned wind wheel and the attribute parameter data in the above-mentioned blades; according to the flow separation position on the above-mentioned blade surface, the arrangement position where the plasma will be laid on the blade surface is determined, and the corresponding plasma is arranged at the arrangement position on the above-mentioned blade surface, thereby achieving the purpose of filling the defects in the structure of the wind turbine generator set by the plasma laid on the blade surface, thereby achieving the effect of adjusting the aerodynamic characteristics of the wind turbine blades under different wind speeds by controlling the flow of plasma, and improving the power generation efficiency of the wind turbine generator set, thereby solving the technical problem of low power generation efficiency of the wind turbine generator set caused by defects in the structural design of the wind turbine generator set.

[0048] As an optional solution, determining the flow separation position on the blade surface of each blade in the wind rotor according to the wind rotor aerodynamic data includes:

[0049] S1, using the wind rotor aerodynamic data to calculate the wind rotor solidity of the wind rotor;

[0050] S2, calculate the aerodynamic efficiency of the wind wheel according to the aerodynamic data of the wind wheel and the solidity of the wind wheel;

[0051] S3, acquiring surface wind flow data collected from the blade surface of each blade at the rated wind speed of the wind rotor;

[0052] S4, determining the flow separation position on the blade surface of each blade according to the solidity of the wind rotor, the aerodynamic efficiency of the wind rotor and the surface wind flow data of each blade.

[0053] For example, taking a vertical axis wind turbine as an example, after the rotor solidity of the wind rotor is calculated using the rotor aerodynamic data, the rotor aerodynamic efficiency of the wind rotor can be calculated based on the rotor aerodynamic data and the rotor solidity, as shown in formula (1):

[0054]

[0055] Wherein, η is the aerodynamic efficiency of the wind wheel, P1 is the actual output power of the wind wheel, and P2 is the theoretical output power of the wind wheel. The actual output power of the above-mentioned wind wheel is usually obtained by measuring the actual operation of the wind wheel. For example, the actual output power of the wind wheel can be directly measured in the form of readings by a power analyzer or other professional measuring equipment. The theoretical output power of the above-mentioned wind wheel can be calculated based on the aerodynamic data of the wind wheel and the solidity of the wind wheel, as shown in formula (2):

[0056]

[0057] Where ρ is the air density of the environment where the wind rotor is located, S is the total projected area of ​​the wind rotor rotation plane, σ is the solidity of the wind rotor, v is the actual wind speed of the environment where the wind rotor is located, and C p is the power coefficient of the wind rotor, which is a dimensionless number. Its specific value depends on the design parameters of the wind rotor and the operating conditions of the wind rotor. The design parameters of the wind rotor include but are not limited to the wind rotor radius, blade shape, blade material, etc. The operating conditions of the wind rotor include but are not limited to the wind speed in the environment where the wind rotor is located.

[0058] In this embodiment, after calculating the solidity and aerodynamic efficiency of the wind rotor, the wind flow data on the blade surface is collected from the blade surface of each blade at the rated wind speed of the wind rotor. For example, a red silk thread can be evenly attached to the suction surface of the blade, and an industrial camera can be used to take photos of the running blades from multiple angles. The camera is placed on the ground 50 meters away from the unit, and the lens is aimed at the suction surface of the blade; the HSV (Hue, Saturation, Value) color mode of the industrial camera is used to detect the color of the photo, realize automatic recognition of the silk thread, and select qualified photos for statistical analysis, so as to obtain visualized wind flow data on the blade surface.

[0059] In this embodiment, after the wind flow data on the blade surface is obtained, the flow separation position on the blade surface of each blade is determined according to the solidity of the wind rotor, the aerodynamic efficiency of the wind rotor and the wind flow data on the blade surface of each blade. For example, according to the visualized wind flow data on the blade surface, the flow condition on the blade surface is observed to determine the specific position on the blade surface where the fluid flow changes from the attached state to the detached state, and this position is the flow separation position on each blade surface of the current wind rotor.

[0060] Through the embodiments provided in the present application, after the solidity and aerodynamic efficiency of the wind rotor are calculated using the aerodynamic data of the wind rotor, the surface wind flow data collected from the blade surface of each blade at the rated wind speed of the wind rotor is obtained, and the flow separation position on the blade surface of each blade is determined based on the solidity, aerodynamic efficiency and surface wind flow data of each blade, thereby achieving the flow separation position on the blade surface by combining the aerodynamic characteristics of the wind rotor with the actual flow conditions on the blade surface, and making the obtained flow separation position on the blade surface more in line with the actual operation scenario of the wind rotor.

[0061] As an optional solution, the wind rotor solidity of the wind rotor is calculated using the wind rotor aerodynamic data, including:

[0062] S1, obtaining a wind rotor height and a wind rotor radius of the wind rotor from the attribute parameter data of the wind rotor, and obtaining the number of blades and the blade chord length from the attribute parameter data of the blades;

[0063] S2, the swept area of ​​the wind rotor is calculated based on the wind rotor height and the wind rotor radius;

[0064] S3, based on the number of blades, blade chord length, rotor height and swept area, calculate the rotor solidity of the wind rotor.

[0065] For example, assuming that the swept area of ​​the wind rotor is represented by A, taking a vertical axis wind turbine as an example, according to the wind rotor height and wind rotor radius in the above attribute parameter data, the swept area of ​​the wind rotor can be calculated, as shown in formula (3):

[0066] A=2LR (3)

[0067] Among them, A is the swept area of ​​the wind rotor, L is the height of the wind rotor, and R is the radius of the wind rotor.

[0068] Assuming that the solidity of the wind rotor is represented by σ, the solidity of the wind rotor can be calculated based on the number of blades, blade chord length, wind rotor height and swept area, as shown in formula (4):

[0069]

[0070] Among them, N is the number of blades, c is the blade chord length, L is the height of the wind rotor, and A is the swept area of ​​the wind rotor.

[0071] That is to say, in this embodiment, after the attribute parameter data of the wind wheel is obtained, the swept area A of the wind wheel can be calculated by formula (3) based on the wind wheel height L and the wind wheel radius R in the attribute parameter data, and the solidity σ of the wind wheel can be calculated by formula (4) based on the number of blades N, the blade chord length c, and the swept area A of the wind wheel in the attribute parameter data.

[0072] Through the embodiments provided in the present application, the attribute parameter data of the wind wheel is obtained, and the solidity of the wind wheel is calculated based on the attribute parameter data, thereby realizing the analysis and calculation of the aerodynamic characteristics of the wind wheel, and achieving the purpose of analyzing the flow conditions on the blade surface in combination with the aerodynamic characteristics of the wind wheel.

[0073] As an alternative, Figure 2 As shown, according to the flow separation position on the blade surface, determining the arrangement position where the plasma will be laid on the blade surface includes:

[0074] S202, calculating the wind energy currently collected by the wind rotor according to the air density of the area where the wind rotor is located, the rated wind speed of the wind rotor, and the swept area of ​​the wind rotor;

[0075] Optionally, the calculation formula for the wind energy currently collected by the wind rotor is:

[0076]

[0077] Among them, E is the wind energy currently collected by the wind rotor, ρ is the air density in the area where the wind rotor is located, v is the rated wind speed of the wind rotor, and A is the swept area of ​​the wind rotor.

[0078] S204, determining the size information of the plasma to be laid on the surface of the blade according to the wind energy currently collected by the wind rotor, wherein the size information of the plasma includes the length, height and width of the plasma;

[0079] Optionally, the relationship between the size information of the plasma and the wind energy currently collected by the wind wheel satisfies:

[0080]

[0081] E f =E (7)

[0082]

[0083] Among them, E f is the kinetic energy of the plasma, ρ f is the density of plasma, u is the flow velocity of plasma, a is the thickness of plasma, b is the width of plasma, c is the length of plasma, and m is the mass of plasma.

[0084] Optionally, the flow velocity of the plasma may be, but is not limited to, numerically equal to the actual wind speed in the area where the wind wheel is located. The mass of the plasma may be, but is not limited to, directly measured by a measuring instrument. For example, a spectrometer may be used to measure the spectrum emitted by the plasma, and the mass of the plasma may be calculated by analyzing the spectrum.

[0085] S206, determining candidate arrangement positions of the plasma according to the size information of the plasma and the flow separation position on the blade surface.

[0086] Optionally, the candidate arrangement position of the plasma may be obtained by, but is not limited to, determining the flow separation position on the blade surface as the position of the center of gravity of the plasma, and determining the position of the center of gravity of the plasma as the candidate arrangement position of the plasma. The center of gravity refers to the geometric center of the plasma, which may be obtained by, but is not limited to, measuring the intersection of the length midline, width midline, and thickness midline of the plasma.

[0087] Through the embodiments provided in the present application, the wind energy currently collected by the wind wheel is calculated based on the air density in the area where the wind wheel is located, the rated wind speed of the wind wheel, and the swept area of ​​the wind wheel. Based on the wind energy currently collected by the wind wheel, the size information of the plasma to be laid on the surface of the blade is determined, so that the size and layout position of the plasma can be determined in combination with the actual wind conditions, thereby achieving the purpose of making the size and position of the plasma more in line with the actual application situation.

[0088] As an optional solution, in step S206, after the candidate arrangement positions of the plasma are determined according to the size information of the plasma and the flow separation position on the blade surface, Figure 3 As shown, it also includes:

[0089] S302, arranging plasma at a candidate arrangement position of plasma on a blade surface of a blade;

[0090] S304, verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position, and obtaining a first verification result parameter;

[0091] Optionally, the verification method for verifying the aerodynamic unloading effect of plasma includes but is not limited to a flow field experiment method. The flow performance of the plasma at the candidate arrangement position can be obtained by observing the gas flow on the blade surface using a high-speed camera in a flow field experiment. For example, a wind speed that gradually increases from zero is artificially applied to the wind wheel to simulate the actual wind turbine operation scene, and the gas flow on the blade surface and the plasma flow are observed with a high-speed camera to determine whether the gas flow on the blade surface changes, and then verify whether the flow of plasma can significantly adjust the gas flow on the blade surface of the wind turbine at different wind speeds. According to the verification result, a first verification result parameter is obtained. For example, the value of the first verification result parameter here can be 0 or 1. When the aerodynamic unloading effect of plasma meets the preset aerodynamic unloading condition, the first verification result parameter is set to 1; when the aerodynamic unloading effect of plasma does not meet the preset aerodynamic unloading condition, the first verification result parameter is set to 0.

[0092] S306 , when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition, determining the candidate arrangement position as the arrangement position of the plasma.

[0093] Through the embodiments provided in the present application, plasma is arranged at a candidate arrangement position of plasma on the blade surface of a blade, and the aerodynamic unloading effect of the plasma is verified based on the flow performance of the arranged plasma to obtain a first verification result parameter, and when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma arranged on the blade surface meets the preset aerodynamic unloading conditions, the candidate arrangement position is determined as the arrangement position of the plasma, thereby ensuring that the plasma arranged on the blade surface meets the preset aerodynamic unloading conditions under actual circumstances, effectively compensating for the structural defects of the wind turbine generator set.

[0094] As an optional solution, in step S304, based on the flow performance of the plasma at the candidate arrangement position, the aerodynamic unloading effect of the plasma is verified, and after obtaining the first verification result parameter, the method further includes:

[0095] S1, when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition, adjusting the arrangement position of the plasma according to the flow separation position on the blade surface to obtain an updated arrangement position;

[0096] Optionally, in this embodiment, the above-mentioned adjustment of the arrangement position of the plasma according to the flow separation position on the blade surface may be, but is not limited to, re-performing the above-mentioned steps S202 to S206 according to the flow separation position on the blade surface, re-determining the candidate arrangement position of the plasma, and thus recalculating the arrangement position of the plasma in combination with the size information of the plasma. The above-mentioned updated arrangement position may be, but is not limited to, obtained by determining the arrangement position of the plasma obtained by recalculation as the above-mentioned updated arrangement position.

[0097] S2, based on the flow performance of the plasma at the updated arrangement position, verify the aerodynamic unloading effect of the plasma to obtain a second verification result parameter;

[0098] Optionally, in this embodiment, the second verification result parameter may be, but is not limited to, after arranging the plasma at the updated arrangement position, using the flow field experimental method to observe the flow performance of the plasma at the updated arrangement position, and verifying its aerodynamic unloading effect, and determining the second verification result parameter according to the verification result. For example, the value of the second verification result parameter here can be 0 or 1. When the aerodynamic unloading effect of the plasma at the updated arrangement position meets the preset aerodynamic unloading condition, the second verification result parameter is set to 1; when the aerodynamic unloading effect of the plasma at the updated arrangement position does not meet the preset aerodynamic unloading condition, the second verification result parameter is set to 0.

[0099] S3, when the second verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition, determining the updated arrangement position as the arrangement position of the plasma.

[0100] Through the embodiments provided by the present application, when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading conditions, the arrangement position of the plasma is adjusted according to the flow separation position on the blade surface to obtain an updated arrangement position, and based on the flow performance of the plasma at the updated arrangement position, the aerodynamic unloading effect of the plasma at the updated arrangement position is verified to obtain a second verification result parameter, and when the second verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading conditions, the updated arrangement position is determined as the arrangement position of the plasma, so that when the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading conditions, the arrangement position of the plasma can be adjusted and updated, thereby improving the accuracy of the arrangement position of the plasma.

[0101] As an optional solution, in step S302, after arranging the plasma at the candidate arrangement position of the plasma on the blade surface of the blade, the method further includes:

[0102] S1, obtaining the wind rotor power of the wind rotor under a set wind speed, wherein the set wind speed is less than or equal to a maximum wind speed threshold that the wind rotor can withstand;

[0103] S2, determining a power curve of the wind rotor according to a set wind speed and the wind rotor power at the set wind speed, wherein the power curve is used to represent the power of the wind rotor at different wind speeds;

[0104] S3, determining the aerodynamic unloading effect of the plasma based on the power curve.

[0105] For example, the wind rotor power of the above wind rotor at a set wind speed can be calculated by, but not limited to, the following formula:

[0106]

[0107] Where P is the wind rotor power at the set wind speed, ρ is the air density in the area where the wind rotor is located, A is the swept area of ​​the wind rotor, v is the above-mentioned set wind speed, and C p is the wind energy utilization coefficient of the wind wheel, and η is the aerodynamic efficiency of the wind wheel.

[0108] In addition, in this embodiment, the power curve may be, but is not limited to, a geometric curve whose horizontal axis is the set wind speed and whose vertical axis is the wind wheel power of the wind wheel under the set wind speed, so as to intuitively represent the power of the wind wheel under different wind speeds. The aerodynamic unloading effect may be, but is not limited to, obtained based on the changing trend of the power curve. For example, when the set wind speed is higher than the rated wind speed of the wind wheel, the power curve tends to become a straight line parallel to the horizontal axis, and the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition; when the set wind speed is higher than the rated wind speed of the wind wheel, the power curve indicates that the wind wheel power fluctuates significantly with the increase of the set wind speed, and the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition.

[0109] Through the embodiments provided in the present application, by obtaining the wind wheel power at a set wind speed, and obtaining the power curve of the wind wheel from the set wind speed and the wind wheel power, and determining the aerodynamic unloading effect of the plasma based on the power curve, the aerodynamic unloading effect of the plasma can be obtained through simple numerical calculations, thereby reducing the calculation cost of the aerodynamic unloading effect of the plasma.

[0110] Specific combination Figure 4 The process shown is used to illustrate the process of applying the embodiment of the present application to a wind wheel:

[0111] S402, start;

[0112] S404, data acquisition. The wind rotor aerodynamic data and the wind condition information of the area where the wind rotor is located are obtained by instrument measurement. The wind rotor aerodynamic data include: the wind rotor height, the wind rotor radius, the number of blades included in the wind rotor, the blade chord length, the wind rotor power coefficient, and the rated wind speed of the wind rotor. The wind condition information of the area where the wind rotor is located includes: the air density of the area where the wind rotor is located, and the actual wind speed of the area where the wind rotor is located.

[0113] S406, calculation of wind turbine aerodynamic characteristics. This includes:

[0114] S4062, calculate the solidity of the wind rotor. According to the obtained wind rotor height and wind rotor radius, the swept area of ​​the wind rotor is calculated using the above formula (3). According to the calculated wind rotor swept area, and the obtained number of blades, blade chord length, and wind rotor height, the solidity of the wind rotor is calculated using the above formula (4).

[0115] S4064, calculate the aerodynamic efficiency of the wind rotor. Use a power analyzer to obtain the actual power of the wind rotor. Based on the obtained air density in the area where the wind rotor is located, the solidity of the wind rotor, the actual wind speed in the area where the wind rotor is located, and the power coefficient of the wind rotor, use the above formula (2) to calculate the theoretical output power of the wind rotor. Based on the obtained actual power of the wind rotor and the calculated theoretical output power of the wind rotor, use the above formula (1) to calculate the aerodynamic efficiency of the wind rotor.

[0116] S408, determining the candidate plasma arrangement position, including the following steps:

[0117] 1) Calculate the wind energy currently collected by the wind rotor. According to the obtained air density in the area where the wind rotor is located, the rated wind speed of the wind rotor, and the swept area of ​​the wind rotor, the above formula (5) is used to calculate the wind energy currently collected by the wind rotor.

[0118] 2) Calculate the size information of the plasma. Use the spectral analysis method to measure and analyze the spectrum emitted by the plasma using a spectrometer to obtain the mass of the plasma. Based on the measured mass of the plasma and the actual wind speed in the area where the wind wheel is located, the wind energy currently collected by the wind wheel is calculated, and the length, width, and thickness of the plasma are calculated using the above formulas (6) to (8).

[0119] 3) Determine the candidate arrangement position of the plasma. The center of gravity position of the plasma is calculated based on the length, width, and thickness of the plasma. The flow separation position on the blade surface is determined as the position where the center of gravity of the plasma is placed on the blade surface, and then the center of gravity position of the plasma is determined as the candidate arrangement position of the plasma.

[0120] S410, verification of plasma pneumatic unloading effect, includes the following steps:

[0121] 1) Observe the gas flow on the blade surface at the candidate layout location. Simulate the actual wind turbine operation scenario, artificially apply a wind speed that can gradually increase from zero but does not exceed the threshold for the normal operation of the wind rotor, and use a high-speed camera to observe the gas flow on the blade surface and the flow of plasma at the candidate layout location.

[0122] 2) Obtain the verification result parameter. The value of the verification result parameter is 0 or 1. The value of the verification result parameter is determined based on the observed gas flow conditions on the blade surface and the plasma flow conditions. When the gas flow conditions on the blade surface change significantly, the verification result parameter is set to 0, indicating that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading conditions; when the gas flow conditions on the blade surface do not change significantly, the verification result parameter is set to 1, indicating that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading conditions.

[0123] 3) Verify the pneumatic unloading effect of the plasma. If the verification result parameters indicate that the pneumatic unloading effect of the plasma meets the preset pneumatic unloading conditions, the candidate arrangement position is determined as the arrangement position of the plasma; if the verification result parameters indicate that the pneumatic unloading effect of the plasma does not meet the preset pneumatic unloading conditions, the step S408 is restarted until the latest verification result parameters indicate that the pneumatic unloading effect of the plasma meets the preset pneumatic unloading conditions.

[0124] S412, plasma placement: Placing plasma on the blade surface at a candidate plasma placement position.

[0125] S414, determining the pneumatic unloading effect of the plasma, comprising the following steps:

[0126] 1) Data acquisition and calculation. The actual wind speed in the area where the wind rotor is located is obtained. The actual wind speed is less than or equal to the maximum wind speed threshold that the wind rotor can withstand. According to the actual wind speed in the area where the wind rotor is located, the air density in the area where the wind rotor is located, the swept area of ​​the wind rotor, the wind energy utilization coefficient of the wind rotor, and the aerodynamic efficiency of the wind rotor, the above formula (9) is used to calculate the actual power of the wind rotor.

[0127] 2) Create a power curve. Create a power curve of the wind rotor with the actual wind speed in the area where the wind rotor is located as the horizontal axis and the actual power of the wind rotor as the vertical axis.

[0128] 3) Determine the aerodynamic unloading effect of the plasma. When the set wind speed is higher than the rated wind speed of the wind wheel, the power curve tends to become a straight line parallel to the horizontal axis, and the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading conditions; when the set wind speed is higher than the rated wind speed of the wind wheel, the power curve indicates that the wind wheel power fluctuates significantly with the increase of the set wind speed, and the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading conditions.

[0129] S416, end.

[0130] Through the embodiments provided in this application, the following effects can be achieved:

[0131] 1) Through plasma flow control, the gas flow on the blade surface can be actively destroyed at high wind speeds, achieving aerodynamic unloading of the wind turbine and protecting the wind turbine from overspeed damage.

[0132] 2) By controlling the plasma conductor, the operating wind speed range of the wind turbine can be expanded, so that the wind turbine can not only start earlier under low wind speed conditions, but also operate more safely and efficiently under high wind speed conditions, avoiding the occurrence of overspeed and overload.

[0133] 3) The control law of the plasma flow control device is closely coupled with the unit control and the incoming wind conditions, thereby enhancing the intelligent control capability of the wind turbine set, enabling the wind turbine set to adjust the plasma flow control strategy according to the real-time wind speed and wind direction, and achieve more refined and dynamic control.

[0134] 4) By laying plasma on the surface of the blades, the wind turbine can automatically reduce its load, reduce the degree of wear on the blades under high wind speed conditions, reduce the failure rate of the wind turbine, and thus reduce the maintenance cost and downtime of the wind turbine.

[0135] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0136] According to another aspect of the embodiments of the present application, a plasma position determination device for implementing the plasma position determination method is also provided. Figure 5 As shown, the device comprises:

[0137] An acquisition unit 502 is used to acquire aerodynamic data of a wind rotor, wherein the wind rotor includes at least two blades, and the aerodynamic data of the wind rotor includes attribute parameter data of the wind rotor and attribute parameter data of the blades;

[0138] A first determining unit 504 is used to determine the flow separation position on the blade surface of each blade in the wind rotor according to the aerodynamic data of the wind rotor;

[0139] A second determining unit 506 is used to determine the arrangement position where the plasma will be laid on the blade surface according to the flow separation position on the blade surface;

[0140] The arrangement unit 508 is used to arrange the corresponding plasma at the arrangement position on the blade surface.

[0141] Optionally, the embodiments in this solution may refer to but not be limited to the above method embodiments, which will not be described in detail here.

[0142] As an optional solution, the first determining unit includes:

[0143] A first calculation module is used to calculate the solidity of the wind wheel by using the above wind wheel aerodynamic data;

[0144] The second calculation module is used to calculate the aerodynamic efficiency of the wind wheel according to the aerodynamic data of the wind wheel and the solidity of the wind wheel;

[0145] A first acquisition module is used to acquire surface wind flow data collected from the blade surface of each blade at the rated wind speed of the wind rotor;

[0146] The first determination module is used to determine the flow separation position on the blade surface of each blade according to the solidity of the wind wheel, the aerodynamic efficiency of the wind wheel and the surface wind flow data of each blade.

[0147] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0148] As an optional solution, the first calculation module includes:

[0149] An acquisition submodule is used to acquire the height and radius of the wind rotor from the attribute parameter data of the wind rotor, and to acquire the number of blades and the chord length of the blades from the attribute parameter data of the blades;

[0150] A first calculation submodule, configured to calculate a swept area of ​​the wind rotor based on a wind rotor height and a wind rotor radius;

[0151] The second calculation submodule is used to calculate the solidity of the wind rotor based on the number of blades, the chord length of the blades, the height of the wind rotor and the swept area.

[0152] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0153] As an optional solution, the second determining unit includes:

[0154] The third calculation module is used to calculate the wind energy currently collected by the wind rotor according to the air density of the area where the wind rotor is located, the rated wind speed of the wind rotor and the swept area of ​​the wind rotor;

[0155] A second determination module is used to determine the size information of the plasma to be laid on the surface of the blade according to the wind energy currently collected by the wind rotor, wherein the size information of the plasma includes the length, height and width of the plasma;

[0156] The third determination module is used to determine the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the blade surface.

[0157] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0158] As an optional solution, the second determining unit further includes:

[0159] an arrangement module, configured to arrange the plasma at the candidate arrangement position of the plasma on the blade surface of the blade after determining the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the blade surface;

[0160] A first verification module, for verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position, and obtaining a first verification result parameter;

[0161] The fourth determination module is used to determine the candidate arrangement position as the arrangement position of the plasma when the first verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition.

[0162] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0163] As an optional solution, the second determining unit further includes:

[0164] An adjustment module is used to verify the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position, and after obtaining a first verification result parameter, if the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition, adjust the arrangement position of the plasma according to the flow separation position on the blade surface to obtain an updated arrangement position;

[0165] A second verification module is used to verify the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the updated arrangement position to obtain a second verification result parameter;

[0166] The fifth determination module is used to determine the updated arrangement position as the arrangement position of the plasma when the second verification result parameter indicates that the aerodynamic unloading effect of the plasma meets the preset aerodynamic unloading condition.

[0167] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0168] As an optional solution, the second determining unit further includes:

[0169] A second acquisition module is used for arranging plasma at a candidate arrangement position of plasma on the blade surface of the blade, and then acquiring the wind rotor power of the wind rotor under a set wind speed, wherein the set wind speed is less than or equal to a maximum wind speed threshold that the wind rotor can withstand;

[0170] a sixth determination module, configured to determine a power curve of the wind rotor according to a set wind speed and the wind rotor power at the set wind speed, wherein the power curve is used to represent the power of the wind rotor at different wind speeds;

[0171] The seventh determination module is used to determine the aerodynamic unloading effect of the plasma according to the power curve.

[0172] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0173] According to another aspect of the embodiment of the present application, a wind turbine system is also provided. Figure 6 As shown, the system includes:

[0174] The wind wheel 602 includes at least two blades, and the surface of each blade is coated with plasma whose arrangement position is determined according to the method;

[0175] The wind turbine generator set 604 is used to convert the collected wind energy into electrical energy.

[0176] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0177] As an optional solution, the second determining unit further includes:

[0178] The plasma flow control device is used for controlling the arrangement positions of at least two plasma conductors on the surface of the blade.

[0179] Optionally, the embodiments in this solution may be but are not limited to the reference method embodiments, which will not be described in detail here.

[0180] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0181] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0182] 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 solution of this embodiment.

[0183] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0184] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for determining the position of a plasma, characterized in that: include: Acquiring aerodynamic data of a wind wheel, wherein the wind wheel includes at least two blades, and the aerodynamic data of the wind wheel includes attribute parameter data of the wind wheel and attribute parameter data of the blades; Determine the flow separation position on the blade surface of each blade in the wind wheel according to the wind wheel aerodynamic data; Determining, based on the flow separation position on the blade surface, a layout position where the plasma will be laid on the blade surface; The corresponding plasma is arranged at the arrangement position on the surface of the blade.

2. The method according to claim 1, characterized in that: Determining the flow separation position on the blade surface of each blade in the wind wheel according to the wind wheel aerodynamic data comprises: Calculating the solidity of the wind wheel using the wind wheel aerodynamic data; Calculating the aerodynamic efficiency of the wind wheel according to the aerodynamic data of the wind wheel and the solidity of the wind wheel; Acquiring surface wind flow data collected from the blade surface of each of the blades at the rated wind speed of the wind rotor; The flow separation position on the blade surface of each blade is determined according to the solidity of the wind wheel, the aerodynamic efficiency of the wind wheel and the surface wind flow data of each blade.

3. The method according to claim 2, characterized in that The step of calculating the solidity of the wind wheel by using the wind wheel aerodynamic data comprises: Acquire the height and radius of the wind wheel from the attribute parameter data of the wind wheel, and acquire the number of blades and the chord length of the blades from the attribute parameter data of the blades; Calculating the swept area of ​​the wind rotor based on the wind rotor height and the wind rotor radius; The solidity of the wind wheel of the wind wheel is calculated based on the number of blades, the blade chord length, the wind wheel height and the swept area.

4. The method according to claim 1, characterized in that: Determining the arrangement position where the plasma will be laid on the blade surface according to the flow separation position on the blade surface comprises: The wind energy currently collected by the wind wheel is calculated according to the air density of the area where the wind wheel is located, the rated wind speed of the wind wheel and the swept area of ​​the wind wheel; Determining the size information of the plasma to be laid on the surface of the blade according to the wind energy currently collected by the wind wheel, wherein the size information of the plasma includes the length, height and width of the plasma; A candidate arrangement position of the plasma is determined according to the size information of the plasma and the flow separation position on the blade surface.

5. The method according to claim 4, characterized in that After determining the candidate arrangement position of the plasma according to the size information of the plasma and the flow separation position on the blade surface, the method further includes: Arranging plasma at a candidate arrangement position of the plasma on a blade surface of the blade; Based on the flow performance of the plasma at the candidate arrangement position, verify the aerodynamic unloading effect of the plasma to obtain a first verification result parameter; When the first verification result parameter indicates that the pneumatic unloading effect of the plasma meets a preset pneumatic unloading condition, the candidate arrangement position is determined as the arrangement position of the plasma.

6. The method according to claim 5, characterized in that After verifying the aerodynamic unloading effect of the plasma based on the flow performance of the plasma at the candidate arrangement position to obtain a first verification result parameter, the method further includes: When the first verification result parameter indicates that the aerodynamic unloading effect of the plasma does not meet the preset aerodynamic unloading condition, adjusting the arrangement position of the plasma according to the flow separation position on the blade surface to obtain the updated arrangement position; Based on the flow performance of the plasma at the updated arrangement position, verify the aerodynamic unloading effect of the plasma to obtain a second verification result parameter; When the second verification result parameter indicates that the pneumatic unloading effect of the plasma meets a preset pneumatic unloading condition, the updated arrangement position is determined as the arrangement position of the plasma.

7. The method according to claim 5, characterized in that After arranging the plasma at the candidate arrangement position of the plasma on the blade surface of the blade, the method further comprises: Obtaining the wind rotor power of the wind rotor under a set wind speed, wherein the set wind speed is less than or equal to a maximum wind speed threshold that the wind rotor can withstand; Determining a power curve of the wind rotor according to the set wind speed and the wind rotor power at the set wind speed, wherein the power curve is used to represent the power of the wind rotor at different wind speeds; Based on the power curve, the aerodynamic unloading effect of the plasma is determined.

8. A plasma position determination device, characterized in that: include: An acquisition unit, configured to acquire aerodynamic data of a wind wheel, wherein the wind wheel comprises at least two blades, and the aerodynamic data of the wind wheel comprises attribute parameter data of the wind wheel and attribute parameter data of the blades; A first determining unit, configured to determine a flow separation position on a blade surface of each blade in the wind rotor according to the wind rotor aerodynamic data; A second determining unit is used to determine the arrangement position where the plasma will be laid on the surface of the blade according to the flow separation position on the surface of the blade; The arrangement unit is used to arrange the corresponding plasma at the arrangement position on the surface of the blade.

9. A wind turbine system, characterized in that: include: A wind wheel, comprising at least two blades, wherein the surface of each blade is provided with the plasma whose arrangement position is determined by the method according to any one of claims 1 to 7; Wind turbines are used to convert collected wind energy into electrical energy.

10. The wind turbine generator system according to claim 9, characterized in that: Also includes: The plasma flow control device is used to control and adjust the arrangement positions of at least two plasma conductors on the surface of the blade.

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