Wind turbine generator system large yaw error load reduction method, medium, system and device

Abstract

The application discloses a wind turbine large yaw error load reduction method, medium, system and equipment, the method comprises the following steps: S1, obtaining the wind speed value and yaw error value of the wind turbine; S2, respectively comparing the wind speed value and yaw error value with the corresponding preset threshold value; when the wind speed value and yaw error value are greater than the corresponding preset threshold value, the wind turbine performs yaw action and enters the limited power operation mode; when the yaw error value is greater than the corresponding preset threshold value, but the wind speed value is less than the corresponding preset threshold value, the wind turbine performs yaw action and remains in the normal operation mode; when the wind speed value and yaw error value are less than the corresponding preset threshold value, the wind turbine remains in the normal operation mode. The application can effectively reduce the tower load of the wind turbine when operating in a large yaw error environment, increase the safety of the unit, reduce the loss of power generation of the unit, and protect the safe and stable operation of the wind turbine.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of wind power generation technology, and particularly relates to a wind turbine large yaw error load reduction method, medium, system and equipment. BACKGROUND

[0002] With the increase of wind turbine installed capacity, the single machine capacity of wind turbine is continuously increased, the impeller diameter is continuously increased, and the tower height is also increased. Due to the randomness and uncertainty of wind speed and direction, the tower load of wind turbine is increased under large yaw error, especially the existing tower is developing in the direction of light weight, if the wind turbine is operated under large wind and large yaw error, the tower load will be sharply increased, which will greatly affect the safe and stable operation of the unit, and if the stop mode is adopted, the power generation of the wind turbine cannot be guaranteed. SUMMARY

[0003] The technical problem to be solved by the present application is that in view of the technical problems existing in the prior art, the present application provides a wind turbine large yaw error load reduction method, medium, system and equipment which reduces the loss of power generation of the unit while increasing the safety of the unit.

[0004] To solve the above technical problems, the technical scheme provided by the present application is as follows:

[0005] A wind turbine large yaw error load reduction method, comprising the steps of:

[0006] S1, obtaining the wind speed value and yaw error value of the wind turbine;

[0007] S2, comparing the wind speed value and yaw error value with the corresponding preset threshold value respectively; when the wind speed value and yaw error value are both greater than the corresponding preset threshold value, the wind turbine performs yaw action and enters a limited power operation mode; when the yaw error value is greater than the corresponding preset threshold value, but the wind speed value is less than the corresponding preset threshold value, the wind turbine performs yaw action and maintains a normal operation mode; when the wind speed value and yaw error value are both less than the corresponding preset threshold value, the wind turbine maintains a normal operation mode.

[0008] As a further improvement of the above technical scheme:

[0009] In step S2, the limited power operation mode specifically includes: when the wind speed value and the yaw error value are both greater than the corresponding m times preset threshold value, the wind turbine starts yaw and enters a power reduction operation mode one, and the wind turbine power is reduced to P1 operation; when the wind speed value and the yaw error value are both greater than the corresponding n times preset threshold value, the wind turbine starts yaw and enters a power reduction operation mode two, and the wind turbine is reduced to P2 operation; wherein n>m, P1>P2.

[0010] wherein n = m + 1.

[0011] In step S1, after the wind speed value and the yaw error value are acquired, the wind speed value and the yaw error value are filtered.

[0012] The preset threshold corresponding to the wind speed value corresponds to the preset threshold corresponding to the yaw error value.

[0013] The preset threshold corresponding to the wind speed value and the yaw error value is set in advance in a wind speed-yaw error value schedule table.

[0014] In the wind speed-yaw error value schedule table, when the corresponding preset threshold of the wind speed value is 0 m / s, 5 m / s, 10 m / s, and 35 m / s, the corresponding preset threshold of the yaw error value is 1.1345 rad, 1.1345 rad, 0.7850 rad, and 0.523 rad, respectively.

[0015] The application further discloses a computer readable storage medium, which stores a computer program, and the computer program performs the steps of the method when executed by a processor.

[0016] The application further discloses a wind turbine generator set large yaw error load reduction system, which comprises a memory and a processor, the memory stores a computer program, and the computer program performs the steps of the method when executed by the processor.

[0017] The application further discloses an apparatus comprising one or more processors and one or more memories, the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method.

[0018] Compared with the prior art, the application has the following advantages:

[0019] The application sets a wind speed-yaw error value schedule table in advance, and preset thresholds corresponding to the wind speed-yaw error value are set in the wind speed-yaw error value schedule table; during the operation of the wind turbine generator set, the wind speed value and the yaw error value are acquired in real time, and then the wind speed value and the yaw error value are compared with the preset thresholds corresponding thereto, and then the operation mode of the wind turbine generator set is controlled according to the comparison result; specifically, when the wind speed value and the yaw error value are both greater than the preset thresholds corresponding thereto, the wind turbine generator set performs yaw action and enters a limited power operation mode, and segmented power reduction operation is performed according to the corresponding range of the wind speed and the yaw error value, which can effectively reduce the tower load of the wind turbine generator set during operation in a large yaw error environment, increase the safety of the unit, reduce the loss of power generation of the unit, and protect the safe and stable operation of the wind turbine generator set.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The flow chart of the load reduction method of the present application in the embodiment.

[0021] Figure 2 The flow chart of the power reduction operation of the present application in the embodiment. DETAILED DESCRIPTION

[0022] The present application is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] As Figure 1 shown, the wind turbine large yaw error load reduction method of the embodiment of the present application comprises the steps of:

[0024] S1, obtaining the wind speed value and the yaw error value of the wind turbine during the operation of the wind turbine; wherein the yaw error value is the included angle between the incoming flow direction and the cabin position;

[0025] S2, comparing the wind speed value and the yaw error value with their corresponding preset threshold values respectively; when the wind speed value and the yaw error value are both greater than their corresponding preset threshold values, the wind turbine performs yaw action and enters the limited power operation mode; when the yaw error value is greater than its corresponding preset threshold value, but the wind speed value is less than its corresponding preset threshold value, the wind turbine performs yaw action and remains in the normal operation mode; when the wind speed value and the yaw error value are both less than their corresponding preset threshold values, the wind turbine remains in the normal operation mode.

[0026] In order to more effectively reduce the tower load of the wind turbine when the wind turbine operates in a large yaw error environment, in step S2, the limited power operation mode specifically includes: when the wind speed value and the yaw error value are both greater than their corresponding m times preset threshold values, the wind turbine starts yawing and enters the power reduction operation mode one, and the wind turbine power is reduced to P1 operation; when the wind speed value and the yaw error value are both greater than their corresponding n times preset threshold values, the wind turbine starts yawing and enters the power reduction operation mode two, and the wind turbine is reduced to P2 operation, as Figure 2 shown; wherein n > m, P1 > P2. Specifically, n = m + 1.

[0027] In a specific embodiment, in step S1, after obtaining the wind speed value and the yaw error value, the wind speed value and the yaw error value are filtered to ensure the reliability of the data, thereby improving the reliability of the subsequent load reduction.

[0028] In a specific embodiment, the preset threshold value corresponding to the wind speed value corresponds to the preset threshold value of the yaw error value. The preset threshold values corresponding to the wind speed value and the yaw error value are pre-set in a wind speed - yaw error value scheduling table. Specifically, as shown in Table 1: In the wind speed - yaw error value scheduling table, when the corresponding preset threshold values of the wind speed value are 0 m / s, 5 m / s, 10 m / s, and 35 m / s respectively, the preset threshold values of the corresponding yaw error values are 1.1345 rad, 1.1345 rad, 0.7850 rad, and 0.523 rad;

[0029] Table 1 Wind speed - yaw error value scheduling table

[0030]

[0031] Through the above different threshold ranges of the wind speed - yaw error value scheduling table, the unit adopts a segmented power reduction operation mode, which more effectively reduces the tower barrel load during the operation of the unit in a large yaw environment.

[0032] The following further illustrates the present invention according to a complete specific embodiment:

[0033] As Figures 1-2 shown, first, the wind speed value and the yaw error value are extracted by a wind speed and direction sensor, and then the extracted wind speed value and the yaw error value are filtered; if the yaw error value triggers the limit value (preset threshold) in the wind speed - yaw error value scheduling table and the wind speed is greater than the preset threshold, the unit yaws and enters the power limit operation mode. In the power limit operation mode, when both the wind speed value and the yaw error value are greater than 1 times the limit value of the wind speed yaw error scheduling table, the wind turbine starts to yaw and enters the first power reduction operation mode, and the power of the wind turbine drops to P1 for operation; when both the wind speed value and the yaw error value are greater than (1 + k) (0 < k < 1) times the limit value of the wind speed yaw error scheduling table, the wind turbine starts to yaw and enters the second power reduction operation mode, and the wind turbine drops to P2 for operation, where P1 > P2; if the yaw error value triggers the limit value of the wind speed - yaw error value scheduling table, but the wind speed is less than the preset threshold, the unit yaws and maintains the normal operation mode; otherwise, the unit still maintains the normal operation mode.

[0034] The application pre-provisions a wind speed-yaw error value scheduling table, in which preset thresholds corresponding to the wind speed-yaw error values are preset; during the operation of the wind turbine, the wind speed value and the yaw error value are acquired in real time, and then the wind speed value and the yaw error value are compared with the preset thresholds corresponding thereto, and then the operation mode of the wind turbine is controlled according to the comparison result; specifically, when the wind speed value and the yaw error value are both greater than the preset thresholds corresponding thereto, the wind turbine performs yaw action and enters a limited power operation mode, and segmented power reduction operation is performed according to the corresponding range of the wind speed and the yaw error value, which can effectively reduce the tower load of the wind turbine when the wind turbine operates in a large yaw error environment, increase the safety of the unit, reduce the loss of power generation of the unit, and protect the safe and stable operation of the wind turbine. The application is simple to apply and has strong universality, and can be applied on multiple power platforms.

[0035] The embodiment of the application further provides a computer readable storage medium, which stores a computer program, and the computer program performs the steps of the method when executed by a processor. The embodiment of the application further provides a wind turbine large yaw error load reduction system, which comprises a memory and a processor, and the memory stores a computer program, and the computer program performs the steps of the method when executed by the processor. The application further provides a device, which comprises one or more processors and one or more memories, and the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method. The medium, system and device of the application correspond to the method, and have the advantages of the method.

[0036] As shown in the present disclosure and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not specify a singular number, but can also include a plural number. The words "first", "second", and similar words used in the present disclosure do not indicate any order, number, or importance, but are only used to distinguish different components. Similarly, the words "include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects. The words "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] The above is only the preferred embodiment of the application, and the protection scope of the application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the application shall fall within the protection scope of the application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the application shall be considered as falling within the protection scope of the application.

Claims

1. A wind turbine generator system large yaw error load reduction method, characterized by, The method comprises the steps of: S1, obtaining a wind speed value and a yaw error value of a wind turbine generator set; S2, comparing the wind speed value and the yaw error value with their corresponding preset threshold values respectively; when the wind speed value and the yaw error value are both greater than their corresponding preset threshold values, the wind turbine generator set performs yaw action and enters a limited power operation mode; when the yaw error value is greater than its corresponding preset threshold value, but the wind speed value is less than its corresponding preset threshold value, the wind turbine generator set performs yaw action and remains in a normal operation mode; when the wind speed value and the yaw error value are both less than their corresponding preset threshold values, the wind turbine generator set remains in a normal operation mode; In step S2, the limited power operation mode specifically includes: when the wind speed value and the yaw error value are both greater than their corresponding m times preset threshold values, the wind turbine generator set starts yawing and enters a power reduction operation mode one, and the wind turbine generator set is reduced to P1 for operation; when the wind speed value and the yaw error value are both greater than their corresponding n times preset threshold values, the wind turbine generator set starts yawing and enters a power reduction operation mode two, and the wind turbine generator set is reduced to P2 for operation; wherein n>m, P1>P2; Wherein n=m+1; The preset threshold values corresponding to the wind speed value and the yaw error value are set in advance in a wind speed-yaw error value scheduling table; In the wind speed-yaw error value scheduling table, when the corresponding preset threshold values of the wind speed value are 0 m / s, 5 m / s, 10 m / s, and 35 m / s, the corresponding preset threshold values of the yaw error value are 1.1345 rad, 1.1345 rad, 0.7850 rad, and 0.523 rad respectively.

2. The wind turbine generator system large yaw error load shedding method according to claim 1, characterized by, In step S1, after obtaining the wind speed value and the yaw error value, the wind speed value and the yaw error value are filtered.

3. The wind turbine generator system large yaw error load shedding method according to claim 1 or 2, characterized by, The preset threshold value corresponding to the wind speed value corresponds to the corresponding preset threshold value of the yaw error value.

4. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by a processor, performs the steps of the method of any one of claims 1-3.

5. A wind turbine generator system yaw error large load reduction system, comprising a memory and a processor, the memory has a computer program stored thereon, characterized in that, The computer program, when executed by a processor, performs the steps of the method of any one of claims 1-3.

6. An apparatus, comprising: The computer program, when executed by a processor, performs the steps of the method of any one of claims 1-3.

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