Method and system for adjusting wind turbine sector operating condition based on acceleration trend

Abstract

The application discloses a kind of based on acceleration trend adjustment wind turbine sector operating mode control method and system, the control method based on acceleration trend adjustment wind turbine sector operating mode of the present application includes after wind turbine enters sector operating mode, the acceleration of wind turbine is detected in real time, and according to the acceleration of wind turbine, the pitch opening of wind turbine is controlled so that the change trend of acceleration, pitch opening is negatively correlated.The present application aims at making wind turbine realize accurate control to the operating state of unit under the condition of guaranteeing safety after entering sector operating mode, can effectively improve wind energy utilization efficiency, avoid the power generation loss caused by the frequent triggering of sector management shutdown of some poor wind site generator unit, and can be applicable to the operating state optimization of various wind turbine under sector operating mode.

Description

Technical Field

[0001] This invention relates to wind turbine sector operation condition management and blade movement control technology, specifically to a control method and system for adjusting wind turbine sector operation conditions based on acceleration trend. Background Technology

[0002] Wind turbine sector management technology refers to the process where, under certain wind angles and speed ranges (exceeding the rated wind speed), if the turbine operates in normal mode, it will experience significant wind turbine loads, leading to substantial vibrations in the turbine blades and nacelle, potentially causing damage. In such cases, feathering and shutdown operations are necessary. Figure 1 As shown, this technology actually ensures the safety and stability of wind power generation equipment at the expense of power generation. However, with the arrival of the era of competitive bidding and grid parity for wind power in my country, wind power sector management technology has limitations in achieving precise control over the operating status of wind turbine generators. In particular, for generators in locations with poor wind conditions, sector management shutdowns are frequently triggered, resulting in significant power generation losses. Summary of the Invention

[0003] The technical problem this invention aims to solve is to address the issue of unnecessary power generation losses caused by wind turbines directly feathering or shutting down when entering sector operating conditions. This invention provides a control method and system for adjusting the sector operating conditions of wind turbines based on acceleration trends. The invention aims to enable precise control of the operating status of wind turbines after entering sector operating conditions while ensuring safety. This effectively improves wind energy utilization efficiency and avoids power generation losses caused by frequent sector management shutdowns of turbines in locations with poor wind conditions. It is applicable to optimizing the operating status of various wind turbines under sector operating conditions.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A control method for adjusting the sector operating conditions of a wind turbine generator based on acceleration trend includes real-time detection of the acceleration of the wind turbine generator after it enters the sector operating conditions, and controlling the blade opening of the wind turbine generator based on the acceleration of the wind turbine generator so that the change trends of acceleration and blade opening are negatively correlated.

[0006] Optionally, the functional expression for controlling the blade opening of the wind turbine generator based on the acceleration of the wind turbine generator is:

[0007] Y t =-a t *k+b

[0008] In the above formula, Y t Let a be the blade opening at time t. tis the acceleration of the wind turbine at time t, k is a sensitivity following constant, and b is an opening amplitude control parameter.

[0009] Optionally, the real-time detection of the acceleration of the wind turbine comprises real-time detection of the acceleration of the wind turbine by acceleration sensors respectively installed in different directions of the wind turbine, and selection of the maximum acceleration output by the acceleration sensors as the real-time detected acceleration of the wind turbine.

[0010] Optionally, the acceleration sensors respectively installed in different directions of the wind turbine comprise acceleration sensors respectively installed in x and y axis directions of the wind turbine, the x and y axis directions are perpendicular to each other, and the acceleration a xt output by the acceleration sensor in the x axis direction at time t and the acceleration a yt output by the acceleration sensor in the y axis direction satisfy |a xt |>|a yt |, |a xt | is taken as the detected acceleration of the wind turbine at time t, and if |a yt |>|a xt |, |a yt | is taken as the detected acceleration of the wind turbine at time t.

[0011] Optionally, the plane formed by the x and y axis directions is a horizontal plane.

[0012] Optionally, the real-time detection of the acceleration of the wind turbine further comprises real-time detection of the wind speed of a wind field where the wind turbine is located, and determination of the opening amplitude control parameter b according to the wind speed v t at time t by using a preset mapping function.

[0013] Optionally, the preset mapping function is a piecewise function of wind speed-opening amplitude control parameter, and different ranges of wind speed intervals correspond to one opening amplitude control parameter.

[0014] Optionally, the acceleration of the wind turbine refers to the acceleration of a nacelle or a tower of the wind turbine.

[0015] In addition, the application further provides a control system for adjusting a sector working condition of a wind turbine based on an acceleration trend, comprising a microprocessor and a memory connected to each other, the microprocessor being programmed or configured to execute the control method for adjusting the sector working condition of the wind turbine based on the acceleration trend.

[0016] Further, the application also provides a computer readable storage medium, wherein a computer program is stored, and the computer program is used for programming or configuring a microprocessor to execute the control method for adjusting the sector working condition of a wind turbine generator set based on acceleration trend.

[0017] Compared with the prior art, the application has the following advantages:

[0018] 1. The application comprises detecting the acceleration of a wind turbine generator set in real time after the wind turbine generator set enters a sector working condition, and controlling the blade opening degree of the wind turbine generator set according to the acceleration of the wind turbine generator set, so that the change trends of the acceleration and the blade opening degree are negatively correlated. Compared with the case that the traditional wind turbine generator set directly stops after entering a sector working condition, causing power generation loss, the application controls the blade opening degree of the wind turbine generator set according to the acceleration of the wind turbine generator set, so that the change trends of the acceleration and the blade opening degree are negatively correlated, the change trend of the acceleration of the wind turbine generator set is opposite to the trend of the blade opening degree after the wind turbine generator set enters a sector working condition, the reverse blade opening degree adjustment can maximize the safety of the wind turbine generator set in a sector working condition, and the wind turbine generator set can realize precise control of the operating state of the wind turbine generator set after entering a sector working condition while ensuring safety, which can effectively improve the wind energy utilization efficiency, avoid power generation loss caused by frequent triggering of sector management shutdown of a generator set in a poor wind condition, and be suitable for optimizing the operating state of various wind turbine generator sets in a sector working condition.

[0019] 2. The application controls the blade opening degree of the wind turbine generator set according to the acceleration of the wind turbine generator set, so that the change trends of the acceleration and the blade opening degree are negatively correlated. In the case that the wind turbine generator set is in an unstable sector working condition, the real-time acceleration value measured by the acceleration sensor of the nacelle and the tower of the wind turbine generator set participates in the control of the operating state of the wind turbine generator set, and the blade opening degree amplitude is determined in combination with the wind speed, so that the wind turbine generator set can generate power in a sector working condition without large vibration, realizing the change from shutdown without power generation to precise control of the operating state of the wind turbine generator set in a sector working condition, which can be suitable for optimizing the operating state of various wind turbine generator sets in a sector working condition. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the pitch and shutdown of a wind turbine set in a sector working condition according to the prior art.

[0021] Figure 2 It is a basic flowchart of the method of the embodiment of the application.

[0022] Figure 3 It is a schematic diagram of the control principle of a wind turbine set in a sector working condition according to the prior art.

[0023] Figure 4The acceleration curve actually measured in the embodiment of the present application.

[0024] Figure 5 The blade opening curve actually measured in the embodiment of the present application. DETAILED DESCRIPTION

[0025] As Figure 2 shown, the control method for adjusting the sector operating condition of a wind turbine based on the acceleration trend in the embodiment comprises detecting the acceleration of the wind turbine in real time after the wind turbine enters the sector operating condition, and controlling the blade opening of the wind turbine according to the acceleration of the wind turbine so that the change trends of the acceleration and the blade opening are negatively correlated, thereby enabling the wind turbine to realize accurate control of the operating state of the wind turbine after entering the sector operating condition while ensuring safety, effectively improving the wind energy utilization efficiency, avoiding power generation loss caused by frequent triggering of sector management shutdown of the generator set in some poor wind conditions, and being applicable to the operating state optimization of various wind turbines in the sector operating condition.

[0026] To ensure the safety of the wind turbine, the blade opening adjustment curve in the embodiment must be opposite to the trend of the a / t curve, that is, the acceleration a t+1 -a t is in the upward trend, the blade opening Y t+1 is in the downward trend, and a t is in the downward trend. t The symmetric function of the t-axis is-a t , and thus the blade opening is Y t =-a t *k+b, where k is a sensitivity following constant and b is an opening amplitude control parameter. Therefore, the function expression for controlling the blade opening of the wind turbine according to the acceleration of the wind turbine in the embodiment is Y

[0027] =-a t *k+b t .

[0028] In the above formula, Y t is the blade opening at time t, a t is the acceleration of the wind turbine at time t, k is a sensitivity following constant, and b is an opening amplitude control parameter. Through the above function expression, the blade opening trend in the sector operating condition of the wind turbine and the change trend of the acceleration of the wind turbine are in an opposite state, accurate control of the operating state of the wind turbine in the sector operating condition is realized, and the safe and stable operation of the wind turbine is ensured. See Figure 3In the embodiment, the sector working condition is determined by the main control CPU, specifically, when the wind speed is in the given wind speed range Va-Vb and the wind direction angle is in the given wind direction angle Xa-Xb, it is considered that the sector working condition is entered. In the sector working condition, the method in the embodiment is packaged as a reverse regulation program for calling by the main control CPU after determining that the sector working condition is entered, and the blade opening Y at time t is obtained by calling the reverse regulation program according to the specified control period t The variable pitch control system of the input wind turbine can make the blade opening and the acceleration negatively correlated, so as to realize accurate control of the operating state of the wind turbine generator set in the case of ensuring safety after entering the sector working condition, effectively improve the wind energy utilization efficiency, and avoid power generation loss caused by frequent triggering of sector management shutdown of the generator set in some poor wind conditions.

[0029] In the embodiment, the acceleration of the wind turbine generator set is detected in real time after the wind turbine generator set enters the sector working condition, specifically, the real-time data a of the acceleration sensor of the nacelle or the tower is collected t The real-time a / t curve is generated at time t. In order to improve the accuracy of acceleration detection, in the embodiment, when the acceleration of the wind turbine generator set is detected in real time, the acceleration of the wind turbine generator set is detected in real time by acceleration sensors respectively installed in multiple different directions of the wind turbine generator set, and the maximum acceleration output by each acceleration sensor is selected as the acceleration of the wind turbine generator set detected in real time.

[0030] As a preferred embodiment, the acceleration sensors respectively installed in multiple different directions of the wind turbine generator set in the embodiment include acceleration sensors respectively installed in the x and y axis directions of the nacelle or the tower of the wind turbine generator set, the x and y axis directions are perpendicular to each other, and the acceleration a output by the x axis direction acceleration sensor at time t xt and the acceleration a output by the y axis direction acceleration sensor at time t yt If |a xt |>|a yt | is established, |a xt | is taken as the acceleration of the wind turbine generator set detected at time t, if |a yt |>|a xt | is established, |a yt | is taken as the acceleration of the wind turbine generator set detected at time t, and the acceleration of the wind turbine generator set detected at time t is represented as a 给定 The above relationship can be represented as a 给定 =f(|a xt |,|a yt |). Namely:

[0031] When |axt |>|a yt |time, a 给定 =|f(a xt a yt )|=|a xt |;

[0032] when|a yt |>|a xt |time, a 给定 =|f(a xt a yt )|=|a yt |

[0033] In this embodiment, the plane formed by the x and y axes is a horizontal plane.

[0034] Studies have found that the opening amplitude control parameter b is related to wind speed. Therefore, as a preferred implementation, this embodiment, when detecting the acceleration of the wind turbine generator in real time, also includes detecting the wind speed of the wind field where the wind turbine generator is located in real time, and calculating the wind speed v at time t. t The aperture amplitude control parameter b is determined using a preset mapping function, which can be expressed as: b = f(v t ).

[0035] As an optional implementation, the preset mapping function in this embodiment is a piecewise function of wind speed-aperture amplitude control parameter, with different wind speed ranges corresponding to one aperture amplitude control parameter. For example, wind speed v t In v a -v b When the wind speed range is within a certain range, the opening amplitude control parameter b = b1, and so on.

[0036] In this embodiment, the acceleration of the wind turbine generator set is detected in real time as shown in Table 1 and... Figure 2 As shown in Table 1, when the blade opening of the wind turbine is controlled according to the acceleration of the wind turbine, so that the trends of acceleration and blade opening are negatively correlated, the blade opening of the wind turbine is as follows. Figure 3 As shown.

[0037] Table 1: Measured data of acceleration and blade opening.

[0038] Wind speed 15.3 15.49 15.52 15.54 16.04 16.08 16.48 16.63 18.56 18.58 18.84 20.83 Unit acceleration 30 80 50 40 70 60 70 60 60 80 70 70 Blade opening 78.6 74.45 76.98 77.78 75.37 76.18 75.35 76.2 76.2 74.6 75.4 75.4

[0039] From Table 1, Figure 2 and Figure 3It can be seen that the acceleration change trend and the blade opening trend are in reverse state, that is, the acceleration change adjusts the blade opening in reverse. Moreover, the control method for adjusting the sector working condition of the wind turbine based on the acceleration trend controls the blade opening of the wind turbine according to the acceleration of the wind turbine, so that the change trends of the acceleration and the blade opening are negatively correlated, the acceleration change trend and the blade opening trend of the wind turbine are in reverse state after the wind turbine enters the sector working condition, the reverse blade opening adjustment can maximize the safety of the wind turbine in the sector working condition, and the wind turbine can realize accurate control of the operating state of the wind turbine after entering the sector working condition while ensuring safety, which can effectively improve the wind energy utilization efficiency, avoid power generation loss caused by frequent triggering of sector management shutdown of the generator set in some poor wind conditions, and be applicable to the optimization of the operating state of various wind turbines in the sector working condition. The control method for adjusting the sector working condition of the wind turbine based on the acceleration trend controls the blade opening of the wind turbine according to the acceleration of the wind turbine, so that the change trends of the acceleration and the blade opening are negatively correlated, in the case that the wind turbine is in the sector unstable working condition, the real-time acceleration value measured by the acceleration sensor of the nacelle and the tower of the wind turbine participates in the wind turbine operating state control, and the blade opening amplitude is determined in combination with the wind speed, so that the wind turbine generates power while avoiding large vibration in the sector working condition, realizing the change from safety to sector working condition precise control of the wind turbine operating power generation, and being applicable to the optimization of the operating state of various wind turbines in the sector working condition.

[0040] In addition, the embodiment also provides a control system for adjusting the sector working condition of the wind turbine based on the acceleration trend, which comprises a microprocessor and a memory connected with each other, and the microprocessor is programmed or configured to execute the control method for adjusting the sector working condition of the wind turbine based on the acceleration trend.

[0041] In addition, the embodiment also provides a computer readable storage medium, wherein a computer program for programming or configuring the microprocessor to execute the control method for adjusting the sector working condition of the wind turbine based on the acceleration trend is stored in the computer readable storage medium.

[0042] Those skilled in the art will appreciate that embodiments of the application can be readily used as a method, apparatus, or computer program product. Accordingly, the application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the application can take the form of a computer program product on one or more computer readable storage media (including, but not limited to, disk memory, CD-ROMs, optical storage devices, etc.) embodying computer readable program code. The application is described in reference to the flow diagrams and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the application illustrated in the attached drawings, which flow diagrams and / or block diagrams Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram. Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram. Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram. Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram. Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram. Figure 1 one or more functions specified in the flow diagram and / or block diagram. These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagram and / or block diagram.

[0043] The above description is only preferred embodiments of the application, the protection scope of the application is not limited to the above-mentioned embodiments, any technical scheme falling within the idea of the application shall fall within the protection scope of the application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principle of the application, these improvements and refinements shall be considered as the protection scope of the application.

Claims

1. A control method for regulating wind turbine sector operating conditions based on acceleration trend, characterized by, The method comprises detecting acceleration of the wind turbine in real time after the wind turbine enters a sector operating condition, and controlling blade opening degree of the wind turbine according to the acceleration of the wind turbine, so that the acceleration and the blade opening degree are negatively correlated in terms of change trend, and a function expression for controlling the blade opening degree of the wind turbine according to the acceleration of the wind turbine is: Y t = -a t * k + b In the above formula, Y t Let a be the blade opening at time t. t Let be the acceleration of the wind turbine generator at time t, k be the sensitivity following constant, and b be the opening amplitude control parameter. The real-time detection of the wind turbine generator's acceleration includes using multiple acceleration sensors installed in different directions on the wind turbine generator, including acceleration sensors installed along the x and y axes of the wind turbine generator. The x and y axes are perpendicular to each other, and the acceleration 'a' output by the acceleration sensor along the x-axis at time t is... xt Accelerometer a in the y-axis direction yt If |a xt |>|a yt If |a| is true, then |a| will be true. xt |The acceleration of the wind turbine generator obtained at time t, if |a yt |>|a xt If |a| is true, then |a| will be true. yt The acceleration of the wind turbine generator is measured at time t; the plane formed by the x and y axes is a horizontal plane; the real-time detection of the wind turbine generator's acceleration also includes real-time detection of the wind speed in the wind field where the wind turbine generator is located, and the wind speed v at time t is used as the basis for the detection. t The opening amplitude control parameter b is determined using a preset mapping function.

2. The control method for regulating wind turbine sector operating conditions based on acceleration trend according to claim 1, characterized in that, The preset mapping function is a piecewise function of wind speed-opening degree amplitude control parameters, and different ranges of wind speed intervals correspond to an opening degree amplitude control parameter.

3. The control method for adjusting wind turbine sector operating conditions based on acceleration trend of claim 1, wherein, The acceleration of the wind turbine refers to acceleration of a nacelle or a tower drum of the wind turbine.

4. A control system for regulating wind turbine sector operating conditions based on acceleration trend comprising a microprocessor and memory interconnected, characterized in that, The microprocessor is programmed or configured to perform the control method for adjusting the sector operating condition of the wind turbine based on the acceleration trend according to any one of claims 1-3.

5. A computer-readable storage medium having stored therein a computer program, characterized in that, The computer program is used for programming or configuring the microprocessor to perform the control method for adjusting the sector operating condition of the wind turbine based on the acceleration trend according to any one of claims 1-3.

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