A method, medium, system and terminal for controlling load reduction in a carding process

Abstract

The application discloses a kind of card paddle operating condition's load reduction control method, medium, system and terminal, this method includes steps: obtaining the pitch angle measurement of each blade of wind turbine, obtain the maximum pitch angle deviation between each blade and maximum pitch angle measurement value;According to maximum pitch angle measurement value corresponding card paddle fault threshold value is obtained;Maximum pitch angle deviation and corresponding card paddle fault threshold value are compared;When maximum pitch angle deviation is greater than the card paddle fault threshold value, wind turbine carries out shutdown protection.The card paddle fault threshold value of the present application is fine identification, can be fine for different operating conditions Load reduction;When triggering card paddle shutdown protection, the pitch rate at shutdown is interpolated according to maximum pitch angle measurement value, different wind wheel speed sets different pitch rate at shutdown, effectively reduces hub load, improves the safety of unit operation.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of wind power generation, and specifically relates to a load reduction control method, medium, system and terminal for a blade jamming working condition. Background Art

[0002] With the development of wind power technology, the single-unit capacity of wind turbine generators is gradually increasing, and the diameter of the wind rotor is also continuously increasing. The problem of ultimate loads of wind turbine generators under certain specific working conditions (such as blade jamming working conditions) has become an industry challenge. In recent years, with the emergence of some extra-large wind rotor models, during the operation of wind turbine generators, the failure of the pitch system causes one or more blades to jam, so that the blades cannot act according to the pitch command. At this time, the ultimate load of the hub is relatively large, which will greatly affect the safe and stable operation of the unit. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in view of the problems existing in the prior art, the present invention provides a load reduction control method, medium, system and terminal for a blade jamming working condition, which performs refined identification of the blade jamming fault threshold to perform refined load reduction for different operating situations.

[0004] The technical solution proposed by the present invention to solve the above technical problem is as follows:

[0005] A load reduction control method for a blade jamming working condition, comprising the steps:

[0006] Obtain the measured pitch angle value of each blade of the wind turbine generator, and obtain the maximum pitch angle deviation value between the blades and the maximum measured pitch angle value.

[0007] Obtain the corresponding blade jamming fault threshold according to the maximum measured pitch angle value.

[0008] Compare the maximum pitch angle deviation value with the corresponding blade jamming fault threshold; when the maximum pitch angle deviation value is greater than the blade jamming fault threshold, the wind turbine generator performs shutdown protection.

[0009] Preferably, the specific process of obtaining the measured pitch angle value of each blade of the wind turbine generator to obtain the maximum measured pitch angle value, and obtaining the corresponding blade jamming fault threshold according to the maximum measured pitch angle value is: setting a plurality of pitch angle intervals, each of which corresponds to a corresponding pitch angle threshold; when the maximum measured pitch angle value falls within a certain pitch angle interval, the blade jamming fault threshold is the pitch angle threshold corresponding to this pitch angle interval.

[0010] Preferably, pitch angle thresholds p1 and p2 are set, where p1<p2;

[0011] When the maximum measured pitch angle value p MAX <p1, the blade jamming fault threshold is a1;

[0012] When p1≤p MAX ≤p2, the blade jamming fault threshold is a2;

[0013] When p MAX >p2, the blade jamming fault threshold is a3.

[0014] Preferably, pitch angle thresholds s1, s2, s3 are set, where s1<s2<s3;

[0015] When the maximum measured pitch angle p MAX <s1, the blade jamming fault threshold is b1;

[0016] When s1≤p MAX ≤s2, the blade jamming fault threshold is b2;

[0017] When s2<p MAX ≤s3, the blade jamming fault threshold is b3;

[0018] When p MAX >s3, the blade jamming fault threshold is b4.

[0019] Preferably, when performing shutdown protection, the pitch rate during shutdown is interpolated according to the maximum measured pitch angle, and different pitch shutdown rates are set for different blade rotational speeds.

[0020] The present invention further discloses a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method as described above.

[0021] The present invention further discloses a load reduction control system for a blade jamming condition, comprising a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, implements the steps of the method as described above.

[0022] The present invention further discloses a terminal, which comprises one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the operations performed by the method as described above.

[0023] Compared with the prior art, the advantages of the present invention lie in that:

[0024] According to the load reduction control method of the present invention, different blade jamming fault thresholds are set according to the maximum measured pitch angle, so that the blade jamming fault thresholds are identified in a refined manner, and refined load reduction can be performed for different operating conditions; when the blade jamming shutdown protection is triggered, the pitch rate during shutdown is interpolated according to the maximum measured pitch angle, and different pitch shutdown rates are set for different rotor rotational speeds, which effectively reduces the hub load and improves the safety of unit operation. Brief Description of the Drawings

[0025] Figure 1 is a flowchart of the control method according to an embodiment of the present invention. Detailed Description of the Embodiments

[0026] The present invention is further described below with reference to the accompanying drawings of the specification and specific embodiments.

[0027] As Figure 1 shown, the embodiment of the present invention discloses a load reduction control method for a blade pitch stuck condition, comprising the steps of:

[0028] obtaining the measured pitch angle value of each blade of the wind turbine, and obtaining the maximum pitch angle deviation value and the maximum measured pitch angle value among the blades;

[0029] obtaining the corresponding blade pitch stuck fault threshold according to the maximum measured pitch angle value;

[0030] comparing the maximum pitch angle deviation value with the corresponding blade pitch stuck fault threshold; when the maximum pitch angle deviation value is greater than the blade pitch stuck fault threshold, the wind turbine performs shutdown protection.

[0031] According to the load reduction control method of the present invention, different blade pitch stuck fault thresholds are set according to the maximum measured pitch angle value, the blade pitch stuck fault thresholds are identified in a refined manner, and refined load reduction can be performed for different operating conditions.

[0032] In a specific embodiment, the specific process of obtaining the measured pitch angle value of each blade of the wind turbine to obtain the maximum measured pitch angle value, and obtaining the corresponding blade pitch stuck fault threshold according to the maximum measured pitch angle value is: setting a plurality of pitch angle intervals, each pitch angle interval corresponding to a corresponding pitch angle threshold; when the maximum measured pitch angle value falls within a certain pitch angle interval, the blade pitch stuck fault threshold is the pitch angle threshold corresponding to this pitch angle interval.

[0033] Specifically, the pitch angle thresholds p1 and p2 are set, where p1<p2;

[0034] When the maximum measured pitch angle value p MAX <p1, the blade pitch stuck fault threshold is a1;

[0035] When p1≤p MAX ≤p2, the blade pitch stuck fault threshold is a2;

[0036] When p MAX >p2, the blade pitch stuck fault threshold is a3, where a3>a2>a1. Certainly, the above adjacent blade pitch stuck fault thresholds may also be equal.

[0037] In another specific embodiment, the pitch angle thresholds s1, s2, s3 are set, where s1<s2<s3;

[0038] When the maximum measured pitch angle value p MAX is less than s1, the blade jamming fault threshold is b1;

[0039] When s1≤p MAX ≤s2, the blade jamming fault threshold is b2;

[0040] When s2<p MAX ≤s3, the blade jamming fault threshold is b3;

[0041] When p MAX >s3, the blade jamming fault threshold is b4, where b4>b3>b2>b1. Certainly, the adjacent blade jamming fault thresholds described above may also be equal.

[0042] Of course, in other embodiments, different numbers of intervals may be selected according to actual conditions, with corresponding different numbers of blade jamming fault thresholds. Through the above fine identification of the blade jamming fault thresholds, refined load reduction can be carried out for different operating conditions.

[0043] In a specific embodiment, when the blade jamming shutdown protection is triggered, the pitch rate during shutdown will be interpolated according to the maximum measured pitch angle of the three blades, as shown in the table below. The pitch rate is smaller at small pitch angles and increases at large pitch angles. Setting different pitch shutdown rates for different wind wheel speeds can effectively reduce hub loads and improve the safety of unit operation.

[0044]

[0045] The control method of the present invention is simple in engineering application, highly versatile, and can be applied on multiple power platforms.

[0046] The present invention will be further described in detail below in conjunction with a specific embodiment:

[0047] First, extract the measured pitch angle values of blade 1#, blade 2#, and blade 3#, calculate the maximum pitch angle deviation value of any two blades and the maximum measured pitch angle value, and set different blade jamming fault thresholds according to the maximum measured pitch angle value among the pitch angles of the three blades; when the maximum pitch angle deviation value is greater than the blade jamming fault threshold, trigger the blade jamming fault to perform shutdown protection, interpolate and design the pitch rate according to the measured pitch angle, perform segmented adjustment control, so as to protect the safe and stable operation of the wind turbine generator set; when the maximum pitch angle deviation value is less than the corresponding blade jamming fault threshold, the unit operates normally.

[0048] This invention also discloses a computer-readable storage medium storing a computer program thereon, which, when run by a processor, executes the steps of the method described above. This invention further discloses a load reduction control system for a stuck propeller condition, including a memory and a processor. The memory stores a computer program, which, when run by a processor, executes the steps of the method described above. This invention also discloses a terminal including one or more processors and one or more memories. The one or more memories store at least one piece of program code, which is loaded and executed by the one or more processors to implement the operations performed by the method described above. The medium, system, and terminal of this invention correspond to the methods described above and also possess the advantages described above.

[0049] The present invention can implement all or part of the processes in the methods of the above embodiments, or it can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of the above method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. Computer-readable media include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. The memory is used to store computer programs and / or modules. The processor implements various functions by running or executing the computer programs and / or modules stored in the memory, and by calling data stored in the memory. The memory may include high-speed random access memory, as well as non-volatile memory, such as hard disks, RAM, plug-in hard disks, smart memory cards (SMC), secure digital (SD) cards, flash cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0050] As shown in this disclosure and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect.

[0051] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A load reduction control method for a stuck propeller condition, characterized in that, Including the following steps: Obtain the pitch angle measurement value of each blade of the wind turbine, and obtain the maximum pitch angle deviation value and the maximum pitch angle measurement value between each blade; The corresponding jamming fault threshold can be obtained from the maximum pitch angle measurement; Compare the maximum pitch angle deviation value with the corresponding jamming fault threshold; When the maximum pitch angle deviation exceeds the jamming fault threshold, the wind turbine will shut down for protection. The specific process of obtaining the pitch angle measurement value of each blade of the wind turbine, obtaining the maximum pitch angle measurement value, and obtaining the corresponding pitch jamming fault threshold based on the maximum pitch angle measurement value is as follows: set multiple pitch angle intervals, and each pitch angle interval has a corresponding pitch angle threshold; when the maximum pitch angle measurement value is within one of the pitch angle intervals, the pitch jamming fault threshold is the pitch angle threshold corresponding to this pitch angle interval.

2. The load reduction control method for propeller jamming conditions according to claim 1, characterized in that, Set the pitch angle thresholds p1 and p2, where p1 <p2; When the maximum measured pitch angle p MAX is less than p1, the blade seize fault threshold is a1; When p1≤p MAX When p2 is less than or equal to p2, the propeller jamming fault threshold is a2. When p MAX When p2 is greater than 1, the propeller jamming fault threshold is a3.

3. The load reduction control method for propeller jamming conditions according to claim 1, characterized in that, Set the pitch angle thresholds s1, s2, and s3, where s1 <s2<s3; When the maximum measured pitch angle p MAX is less than s1, the blade jamming fault threshold is b1; When s1≤p MAX When ≤s2, the propeller jamming fault threshold is b2; When s2 <p MAX When ≤s3, the propeller jamming fault threshold is b3; When p MAX When the value is >s3, the propeller jamming fault threshold is b4.

4. The load reduction control method for propeller jamming conditions according to any one of claims 1 to 3, characterized in that, When performing shutdown protection, the pitch rate at shutdown will be interpolated based on the measured value of the maximum pitch angle, and different pitch shutdown rates will be set for different blade speeds.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program, when run by a processor, performs the steps of the method as described in any one of claims 1 to 4.

6. A load reduction control system for propeller jamming conditions, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, The computer program, when run by a processor, performs the steps of the method as described in any one of claims 1 to 4.

7. A terminal, characterized in that, The terminal includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1 to 4.

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