A method for determining the restart wind speed of a wind turbine, a control method and an electronic device

Abstract

The present application discloses a method for determining the restart wind speed of a wind turbine generator, a control method, and electronic equipment. The determination method includes: calculating the maximum allowable cut-out times corresponding to the cut-out wind speed condition based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences; determining the theoretical number of shutdowns of the wind turbine generator based on the historical wind speed data and the cut-out wind speed; if the theoretical number of shutdowns is greater than the maximum allowable cut-out times, obtaining the minimum wind speed between two adjacent cut-out wind speeds based on the historical wind speed data of the wind turbine generator; if the wind speed is less than the cut-out wind speed; determining the restart wind speed of the wind turbine generator based on the difference between the theoretical number of shutdowns and the maximum allowable cut-out times and the minimum wind speed. The technical solution disclosed in the present application determines the restart wind speed based on the actual operating conditions of the wind turbine generator, improves the accuracy of the restart wind speed determination, and avoids frequent startup and shutdown of the wind turbine generator.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbines, and more specifically, to a method for determining the wind speed of a wind turbine restart, a method for controlling a wind turbine restart, and electronic equipment. Background Art

[0002] To ensure the safety of wind turbines, wind turbines are configured with cut-out and restart wind speeds. When the average wind speed over a period of time (e.g., 10 minutes) exceeds the set cut-out wind speed, the wind turbine is shut down. When the wind speed drops to the restart wind speed, the wind turbine restarts.

[0003] Currently, the restart wind speed is set equal to the cut-out wind speed, which will cause the wind turbine to start and stop frequently, thereby causing damage to the wind turbine.

[0004] In summary, how to improve the accuracy of determining the restart wind speed to avoid frequent starts and stops of wind turbines is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a method for determining the restart wind speed of a wind turbine generator set, a wind turbine generator set restart control method and an electronic device, which are used to improve the accuracy of determining the restart wind speed to avoid frequent starting and stopping of wind turbine generator sets.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A method for determining the wind speed for restarting a wind turbine generator set, comprising:

[0008] Obtain theoretical equivalent fatigue load of wind turbines;

[0009] Calculate the maximum allowable cut-out times corresponding to the cut-out wind speed condition according to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences;

[0010] Determining theoretical shutdown times of the wind turbine generator set based on historical wind speed data and cut-out wind speed of the wind turbine generator set;

[0011] If the theoretical shutdown number is greater than the maximum allowable cut-out number, then obtaining the minimum wind speed between two adjacent cut-out wind speeds based on the historical wind speed data of the wind turbine generator set; the wind speed is less than the cut-out wind speed;

[0012] The restart wind speed of the wind turbine generator set is determined according to the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed.

[0013] Preferably, determining the restart wind speed of the wind turbine generator set according to the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed includes:

[0014] Arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence;

[0015] The minimum wind speed ranked at the difference position from the front to the back is obtained from the minimum wind speed sequence, and the minimum wind speed ranked at the difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

[0016] Preferably, determining the restart wind speed of the wind turbine generator set according to the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed includes:

[0017] Arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence;

[0018] Obtaining the minimum wind speed ranked in the first and last order from the minimum wind speed sequence;

[0019] Obtaining the time intervals between the two adjacent cut-out wind speeds, and arranging the time intervals in ascending order to obtain a time interval sequence;

[0020] Obtaining the time interval that ranks the first difference position from the front to the back in the time interval sequence, and obtaining the minimum wind speed corresponding to the time interval that ranks the first difference position from the front to the back;

[0021] The maximum wind speed among the minimum wind speed ranked at the difference position from the front to the back and the minimum wind speed corresponding to the time interval ranked at the difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

[0022] Preferably, after determining the restart wind speed of the wind turbine generator set according to the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed, the method further includes:

[0023] Calculating an average restart wind speed according to the restart wind speeds of all the wind turbines in the wind farm;

[0024] The average restart wind speed is determined as the final restart wind speed of each wind turbine in the wind farm.

[0025] Preferably, calculating the maximum allowable cut-out times corresponding to the cut-out wind speed condition according to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences, comprises:

[0026] According to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value and the number of occurrences corresponding to the non-cut-out wind speed condition, a trial-and-error method is used to calculate the maximum allowable cut-out number corresponding to the cut-out wind speed condition.

[0027] Preferably, it also includes:

[0028] Output the restart wind speed of the wind turbine generator set.

[0029] A wind turbine restart control method, comprising:

[0030] When the wind turbine is cut out, obtain the current wind speed;

[0031] Determining whether the current wind speed is less than the restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined by using any of the above-mentioned methods for determining the restart wind speed of the wind turbine generator set;

[0032] If so, the wind turbine generator set is controlled to start.

[0033] A device for determining wind speed for restarting a wind turbine generator set, comprising:

[0034] The first acquisition module is used to obtain the theoretical equivalent fatigue load of the wind turbine;

[0035] a first calculation module, configured to calculate a maximum allowable number of cut-out times corresponding to a cut-out wind speed condition according to the theoretical equivalent fatigue load, a wind turbine damage value corresponding to a cut-out wind speed condition in a wind turbine operating condition, a wind turbine damage value corresponding to a non-cut-out wind speed condition, and a number of occurrences;

[0036] A first determining module is configured to determine a theoretical shutdown number of the wind turbine generator set based on historical wind speed data and a cut-out wind speed of the wind turbine generator set;

[0037] A minimum wind speed obtaining module is configured to obtain, if the theoretical shutdown number is greater than the maximum allowable cut-out number, the minimum wind speed between two adjacent cut-out wind speeds based on historical wind speed data of the wind turbine generator set; and the wind speed is less than the cut-out wind speed;

[0038] The second determining module is configured to determine a restart wind speed for the wind turbine generator set according to a difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed.

[0039] A wind turbine restart control device, comprising:

[0040] The second acquisition module is used to obtain the current wind speed after the wind turbine is switched off;

[0041] a judgment module, configured to judge whether the current wind speed is less than a restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined by using any of the above-mentioned methods for determining the restart wind speed of the wind turbine generator set;

[0042] The control module is configured to control the wind turbine generator set to start if the current wind speed is less than the restart wind speed of the wind turbine generator set.

[0043] An electronic device, comprising:

[0044] memory for storing computer programs;

[0045] A processor is configured to implement the steps of any one of the above-mentioned methods for determining the wind speed of a wind turbine restart and / or the steps of the above-mentioned method for controlling a wind turbine restart when executing the computer program.

[0046] The present application provides a method for determining the wind speed of a wind turbine restarter, a wind turbine restarter control method and an electronic device, wherein the method for determining the wind speed of a wind turbine restarter comprises: obtaining a theoretical equivalent fatigue load of the wind turbine; calculating the maximum allowable cut-out times corresponding to the cut-out wind speed condition according to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition and the number of occurrences; determining the theoretical shutdown times of the wind turbine according to the historical wind speed data and the cut-out wind speed of the wind turbine; if the theoretical shutdown times are greater than the maximum allowable cut-out times, obtaining the minimum wind speed between two adjacent cut-out wind speeds according to the historical wind speed data of the wind turbine; the wind speed is less than the cut-out wind speed; and determining the restart wind speed of the wind turbine according to the difference between the theoretical shutdown times and the maximum allowable cut-out times and the minimum wind speed.

[0047] The above-mentioned technical solution disclosed in the present application calculates the maximum allowable number of cut-outs corresponding to the cut-out wind speed condition based on the theoretical equivalent fatigue load of the wind turbine generator set, the wind turbine generator set damage value corresponding to the cut-out wind speed condition in the wind turbine generator set operating condition, the wind turbine generator set damage value corresponding to the non-cut-out wind speed condition and the number of occurrences, and determines the theoretical number of shutdowns of the wind turbine generator set based on the historical wind speed data of the wind turbine generator set and the cut-out wind speed. If the theoretical number of shutdowns is greater than the maximum number of cut-outs allowed, it indicates that the wind turbine is frequently started and shut down. The minimum wind speed between two adjacent cut-out wind speeds (less than the cut-out wind speed) is obtained based on the historical wind speed data of the wind turbine, and the restart wind speed of the wind turbine is determined based on the difference between the theoretical number of shutdowns and the maximum number of cut-outs allowed and the minimum wind speed, so as to determine the restart wind speed of the wind turbine according to the actual operating conditions of the wind turbine, thereby improving the rationality and accuracy of determining the restart wind speed of the wind turbine, avoiding frequent starts and stops of the wind turbine, thereby avoiding damage to the wind turbine, extending the service life of the wind turbine, shortening the downtime of the wind turbine, and increasing the power generation of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0049] Figure 1 A flow chart of a method for determining the wind speed for restarting a wind turbine generator set provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram showing the relationship between historical wind speed data and cut-out wind speed of a wind turbine provided in an embodiment of the present application;

[0051] Figure 3 A flow chart of a wind turbine restart control method provided in an embodiment of the present application;

[0052] Figure 4 A schematic structural diagram of a device for determining wind speed for restarting a wind turbine generator set provided in an embodiment of the present application;

[0053] Figure 5 A schematic structural diagram of a wind turbine restart control device provided in an embodiment of the present application;

[0054] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The purpose of this application is to provide a method for determining the restart wind speed of a wind turbine generator set, a wind turbine generator set restart control method and an electronic device, which are used to improve the accuracy of determining the restart wind speed, so as to avoid frequent starting and stopping of wind turbine generator sets and reduce the downtime of wind turbine generator sets.

[0056] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0057] See also Figure 1 , which shows a flow chart of a method for determining the wind speed for restarting a wind turbine generator set provided in an embodiment of the present application. The method for determining the wind speed for restarting a wind turbine generator set provided in an embodiment of the present application may include:

[0058] S11: Obtain the theoretical equivalent fatigue load of the wind turbine.

[0059] In this application, the wind turbine restart wind speed determination device can obtain the theoretical equivalent fatigue load corresponding to the wind turbine during design, so as to calculate the maximum allowable cut-out times corresponding to the wind turbine cut-out wind speed working condition based on the theoretical equivalent fatigue load corresponding to the wind turbine.

[0060] The theoretical equivalent fatigue load corresponding to a wind turbine during design can be obtained by obtaining the theoretical equivalent fatigue load of all wind turbines in the wind farm and averaging the theoretical equivalent fatigue loads of all wind turbines to obtain the theoretical equivalent fatigue load of a single wind turbine. Alternatively, the theoretical equivalent fatigue load of a single wind turbine can be directly obtained.

[0061] S12: Calculate the maximum allowable number of cut-out times corresponding to the cut-out wind speed condition based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences.

[0062] The wind turbine restart wind speed determination device can also obtain wind turbine damage values corresponding to the cut-out wind speed condition and the non-cut-out wind speed condition within the wind turbine operating conditions. The wind turbine damage values mentioned here refer to the damage caused to the wind turbine by running the corresponding operating condition once. The wind turbine damage values corresponding to each operating condition can be obtained through testing or estimation based on on-site wind data. Wind turbine operating conditions can be specifically divided into cut-out wind speed conditions and non-cut-out wind speed conditions. Cut-out wind speed conditions specifically include cut-out wind speed start-up conditions and cut-out wind speed shutdown conditions. Non-cut-out wind speed conditions include normal power generation conditions, shutdown idling conditions, fault shutdown conditions, cut-in wind speed start-up conditions, rated wind speed start-up conditions, cut-in wind speed shutdown conditions, and rated wind speed shutdown conditions. In other words, wind turbine operating conditions include all events that generate load when the wind turbine transitions from power generation to standstill or idling.

[0063] In addition, the number of occurrences of the non-cut-out wind speed condition can also be estimated based on on-site wind data (specifically, on-site wind data within a preset historical time period, such as one year). Specifically, the operating time of the corresponding non-cut-out wind speed condition can be counted based on the on-site wind data, and the operating time of the corresponding non-cut-out wind speed condition can be divided by a set time period (generally 10 minutes, which can of course be adjusted according to actual needs) to obtain the number of occurrences of the corresponding non-cut-out wind speed condition.

[0064] For details, please refer to Table 1, which shows a method for obtaining the number of occurrences corresponding to each operating condition in the wind turbine operating condition:

[0065] Table 1. Methods for obtaining the number of occurrences corresponding to each operating condition in the wind turbine operating conditions

[0066]

[0067]

[0068] After step S11 and obtaining the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences in the wind turbine operating condition, the maximum allowable cut-out times corresponding to the cut-out wind speed condition can be calculated based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences. Specifically, according to ∑ 切出风速工况 (Wind turbine damage value corresponding to the cut-out wind speed condition × the maximum number of cut-out times allowed corresponding to the cut-out wind speed condition) + ∑ 非切出风速工况(Wind turbine damage value corresponding to the non-cut-out wind speed condition × number of occurrences corresponding to the non-cut-out wind speed condition) = theoretical equivalent fatigue load. Calculate the maximum allowable cut-out times corresponding to the cut-out wind speed condition, so as to determine the restart wind speed of the wind turbine based on the calculated maximum allowable cut-out times corresponding to the cut-out wind speed condition.

[0069] S13: Determine theoretical shutdown times of the wind turbine generator set based on historical wind speed data and cut-out wind speed of the wind turbine generator set.

[0070] In addition, the wind turbine restart wind speed determination device can also obtain the historical wind speed data of the wind turbine, wherein the statistical time of the historical wind speed data is the same as the statistical time of the on-site wind data mentioned above, and each wind speed data in the historical wind speed data can also be obtained by averaging the wind speed within each set time length.

[0071] After obtaining the historical wind speed data of the wind turbine, the theoretical shutdown times of the wind turbine can be determined based on the historical wind speed data and the cut-out wind speed of the wind turbine. Specifically, the historical wind speed data of the wind turbine can be plotted in chronological order to obtain a historical wind speed data graph, and the cut-out wind speed is used as the dividing line. A wind speed above the cut-out wind speed corresponds to a theoretical shutdown. Therefore, the theoretical shutdown times of the wind turbine can be obtained, as shown in the following example: Figure 2 As shown, it shows a schematic diagram of the relationship between the historical wind speed data and the cut-out wind speed of the wind turbine provided by the embodiment of the present application, wherein the horizontal axis is time (t) and the vertical axis is wind speed data (v). The specific size of the cut-out wind speed can be referred to the prior art. Figure 2 Alternatively, the number of times the historical wind speed data changes from less than the cut-out wind speed to greater than the cut-out wind speed can be counted in chronological order of the historical wind speed data, and this number can be used as the theoretical shutdown number of the wind turbine.

[0072] It should be noted that step S13 may be performed simultaneously with step S11 or step S12, or steps S11 and S12 may be performed first and then step S13, or step S13 may be performed first and then step S11 and step S12.

[0073] S14: If the theoretical shutdown number is greater than the maximum allowable cut-out number, the minimum wind speed between two adjacent cut-out wind speeds is obtained based on the historical wind speed data of the wind turbine generator set; the wind speed is less than the cut-out wind speed.

[0074] After obtaining the maximum allowable cut-out times corresponding to the cut-out wind speed operating condition and the theoretical shutdown times of the wind turbine generator set, the maximum allowable cut-out times corresponding to the cut-out wind speed operating condition and the theoretical shutdown times of the wind turbine generator set may be compared.

[0075] If the maximum allowable number of cutouts corresponding to the cutout wind speed condition is greater than or equal to the theoretical number of shutdowns, this indicates that the wind turbine's actual shutdown times (i.e., the corresponding theoretical number of shutdowns) do not exceed the maximum allowable number of cutouts. This means that the wind turbine's actual shutdown times do not exceed the maximum allowable number of cutouts. In this case, setting the wind turbine's restart wind speed to equal the wind turbine's cutout wind speed will not damage the wind turbine and will have little impact on its power generation.

[0076] If the theoretical number of shutdowns is greater than the maximum allowable number of cut-outs corresponding to the cut-out wind speed condition, it means that the actual number of shutdowns of the wind turbine will exceed the maximum allowable number of cut-outs. In order to avoid damage to the wind turbine due to frequent start-up and shutdown of the wind turbine and increase the downtime of the wind turbine, the minimum wind speed between two adjacent cut-out wind speeds (the wind speed is less than the cut-out wind speed, that is, all wind speeds between two adjacent cut-out wind speeds are less than the cut-out wind speed) can be obtained based on the historical wind speed data of the wind turbine. That is, the minimum wind speed below the cut-out wind speed dividing line and between two adjacent cut-out wind speeds is obtained, so as to determine the restart wind speed of the wind turbine based on the multiple minimum wind speeds obtained.

[0077] S15: Determine the restart wind speed of the wind turbine generator set based on the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed.

[0078] Based on step S14, the restart wind speed of the wind turbine generator can be determined based on the difference between the theoretical shutdown number and the maximum allowable cut-out number and all the obtained minimum wind speeds. Since the restart wind speed of the wind turbine generator is determined based on the minimum wind speed (the minimum wind speed is less than the cut-out wind speed), the determined restart wind speed is less than the cut-out wind speed of the wind turbine generator, thereby effectively reducing the number of wind turbine starts and stops.

[0079] From the above, it can be seen that the present application determines the restart wind speed of the wind turbine according to the actual operating conditions of the wind turbine, and does not simply set the restart wind speed of the wind turbine to be equal to the cut-out wind speed, thereby improving the rationality and accuracy of the determination of the restart wind speed of the wind turbine, so as to avoid frequent starting and stopping of the wind turbine, thereby avoiding damage to the wind turbine, effectively extending the service life of the wind turbine, and effectively shortening the downtime of the wind turbine, thereby increasing the power generation of the wind turbine.

[0080] The above-mentioned technical solution disclosed in the present application calculates the maximum allowable number of cut-outs corresponding to the cut-out wind speed condition based on the theoretical equivalent fatigue load of the wind turbine generator set, the wind turbine generator set damage value corresponding to the cut-out wind speed condition in the wind turbine generator set operating condition, the wind turbine generator set damage value corresponding to the non-cut-out wind speed condition and the number of occurrences, and determines the theoretical number of shutdowns of the wind turbine generator set based on the historical wind speed data of the wind turbine generator set and the cut-out wind speed. If the theoretical number of shutdowns is greater than the maximum number of cut-outs allowed, it indicates that the wind turbine is frequently started and shut down. The minimum wind speed between two adjacent cut-out wind speeds (less than the cut-out wind speed) is obtained based on the historical wind speed data of the wind turbine, and the restart wind speed of the wind turbine is determined based on the difference between the theoretical number of shutdowns and the maximum number of cut-outs allowed and the minimum wind speed, so as to determine the restart wind speed of the wind turbine according to the actual operating conditions of the wind turbine, thereby improving the rationality and accuracy of determining the restart wind speed of the wind turbine, avoiding frequent starts and stops of the wind turbine, thereby avoiding damage to the wind turbine, extending the service life of the wind turbine, shortening the downtime of the wind turbine, and increasing the power generation of the wind turbine.

[0081] A method for determining a wind turbine restart wind speed provided in an embodiment of the present application may include: determining the wind turbine restart wind speed based on the difference between a theoretical shutdown number and a maximum allowable shutdown number and a minimum wind speed; and the method may include:

[0082] Arrange the minimum wind speeds in descending order to obtain the minimum wind speed sequence;

[0083] The minimum wind speed at the difference position from the front to the back is obtained from the minimum wind speed sequence, and the minimum wind speed at the difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

[0084] In the present application, when determining the restart wind speed of a wind turbine generator set based on the difference between the theoretical number of shutdowns and the maximum number of allowable cut-outs and the minimum wind speed, all the obtained minimum wind speeds can be arranged in descending order to obtain a minimum wind speed sequence. Subsequently, the minimum wind speed ranked by the difference (i.e., the difference between the theoretical number of shutdowns and the maximum number of allowable cut-outs) from the front to the back can be obtained from the minimum wind speed sequence, and the minimum wind speed ranked by the difference from the front to the back in the minimum wind speed sequence can be determined as the restart wind speed of the wind turbine generator set.

[0085] Among them, determining the minimum wind speed ranked first in the minimum wind speed sequence as the restart wind speed of the wind turbine generator set can reduce at least one start and shutdown, and determining the minimum wind speed ranked in the difference position from the front to the back in the minimum wind speed sequence as the restart wind speed of the wind turbine generator set can reduce at least the difference number of starts and shutdowns. Therefore, by determining the minimum wind speed ranked in the difference position from the front to the back in the minimum wind speed sequence as the restart wind speed of the wind turbine generator set, the number of starts and shutdowns of the wind turbine generator set can be effectively reduced.

[0086] A method for determining a wind turbine restart wind speed provided in an embodiment of the present application may include: determining the wind turbine restart wind speed based on the difference between a theoretical shutdown number and a maximum allowable shutdown number and a minimum wind speed; and the method may include:

[0087] Arrange the minimum wind speeds in descending order to obtain the minimum wind speed sequence;

[0088] Obtain the minimum wind speed ranked in the first and last difference positions from the minimum wind speed sequence;

[0089] Obtain the time intervals between two adjacent cut-out wind speeds, arrange the time intervals in ascending order, and obtain a time interval sequence;

[0090] Obtaining the time interval that ranks the th difference value from the front to the back from the time interval sequence, and obtaining the minimum wind speed corresponding to the time interval that ranks the th difference value from the front to the back;

[0091] The maximum wind speed among the minimum wind speed ranked at the 1st difference position from the front to the back and the minimum wind speed corresponding to the time interval ranked at the 1st difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

[0092] In this application, when determining the restart wind speed of the wind turbine generator set based on the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed, in addition to the above-mentioned method, the following method can also be used:

[0093] 1) Arrange all the minimum wind speeds obtained in descending order to obtain a minimum wind speed sequence;

[0094] 2) Obtain the minimum wind speed that ranks at the difference value (i.e., the difference between the theoretical shutdown times and the maximum allowed shutdown times) from the minimum wind speed sequence;

[0095] 3) Obtain the time interval between two adjacent cut-out wind speeds (all wind speeds between two adjacent cut-out wind speeds are less than the cut-out wind speed), and then arrange these time intervals in ascending order to obtain a time interval sequence;

[0096] 4) Obtain the time interval that ranks first in the difference value (i.e., the difference between the theoretical number of shutdowns and the maximum number of allowed cut-outs) from the time interval sequence, and obtain the minimum wind speed corresponding to the time interval that ranks first in the difference value;

[0097] 5) The maximum wind speed among the minimum wind speed ranked at the 1st difference position from the front to the back and the minimum wind speed corresponding to the time interval ranked at the 1st difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

[0098] Among them, steps 1) and 2) can reduce the number of starts and shutdowns of the wind turbine by at least the difference, and steps 3) and 4) can avoid a single start and shutdown within a relatively short period of time, thereby preventing damage to the wind turbine. Therefore, step 5) can not only avoid the wind turbine from being started and shut down within a relatively short period of time, but also reduce the number of starts and shutdowns by at least the difference, thereby preventing damage to the wind turbine, thereby extending the service life of the wind turbine and increasing its power generation.

[0099] A method for determining a wind turbine restart wind speed provided in an embodiment of the present application may further include: after determining the wind turbine restart wind speed based on the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed, the method may further include:

[0100] Calculate the average restart wind speed based on the restart wind speeds of all wind turbines in the wind farm;

[0101] The average restart wind speed is determined as the final restart wind speed of each wind turbine in the wind farm.

[0102] In the present application, after determining the restart wind speed of the wind turbine generator set based on the difference between the theoretical number of shutdowns and the maximum number of allowable cut-outs and the minimum wind speed, the restart wind speed average value can also be calculated based on the restart wind speeds of all wind turbines in the wind turbine generator set, and the calculated restart wind speed average value can be determined as the final restart wind speed of each wind turbine in the wind farm to improve the accuracy of determining the restart wind speed of the wind turbine generator set.

[0103] An embodiment of the present application provides a method for determining the restart wind speed of a wind turbine generator set, which calculates the maximum allowable number of cut-out times corresponding to the cut-out wind speed condition based on a theoretical equivalent fatigue load, a wind turbine damage value corresponding to a cut-out wind speed condition in the wind turbine generator set operating condition, and a wind turbine damage value and occurrence count corresponding to a non-cut-out wind speed condition. The method may include:

[0104] According to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition and the number of occurrences, the trial-and-error method is used to calculate the maximum allowable cut-out times corresponding to the cut-out wind speed condition.

[0105] In this application, the maximum allowable number of cut-outs corresponding to the cut-out wind speed condition can be calculated by trial and error based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences. The trial and error method is a continuous trial and error.

[0106] The calculation by trial and error method can improve the simplicity and convenience of calculating the maximum number of allowable cut-out times corresponding to the cut-out wind speed condition.

[0107] The method for determining the wind speed for restarting a wind turbine generator set provided in an embodiment of the present application may further include:

[0108] Output the restart wind speed of the wind turbine.

[0109] In the present application, after determining the restart wind speed of the wind turbine generator set based on the difference between the theoretical number of shutdowns and the maximum number of allowable cut-outs and the minimum wind speed, the restart wind speed of the wind turbine generator set can also be output. Specifically, the restart wind speed of the wind turbine generator set can be output via SMS, email, display interface, etc., so that relevant personnel can obtain the restart wind speed of the wind turbine generator set in a timely manner.

[0110] The present application also provides a method for controlling the restart of a wind turbine generator set. Figure 3 , which shows a flow chart of a wind turbine restart control method provided by an embodiment of the present application, which may include:

[0111] S31: After the wind turbine is switched off, the current wind speed is obtained.

[0112] In this application, when the wind speed (which can be the average wind speed over a set time period, or the real-time wind speed) is greater than the cut-out wind speed, the wind turbine is cut out. After the wind turbine is cut out, the current wind speed can be obtained. The current wind speed can be the average wind speed over the set time period, or the real-time wind speed.

[0113] S32: Determine whether the current wind speed is less than the restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined using any of the above-mentioned wind turbine generator set restart wind speed determination methods; if so, execute step S33; if not, return to step S31 to continue obtaining the current wind speed.

[0114] Based on step S31, it can be determined whether the acquired current wind speed is less than the restart wind speed of the wind turbine generator set, wherein the restart wind speed mentioned here is determined using any of the above-mentioned wind turbine generator set restart wind speed determination methods.

[0115] S33: Control the wind turbine to start.

[0116] If the current wind speed is less than the restart wind speed of the wind turbine generator set, the wind turbine generator set may be controlled to start so that the wind turbine generator set can generate electricity. If the current wind speed is not less than the restart wind speed of the wind turbine generator set, the process returns to step S31 to continue obtaining the restart wind speed of the wind turbine generator set.

[0117] Because each of the aforementioned methods for determining the wind turbine restart wind speed determines the wind turbine restart wind speed based on the actual operating conditions of the wind turbine, the rationality and accuracy of determining the wind turbine restart wind speed can be improved. Therefore, when controlling the wind turbine restart based on the determined restart wind speed, frequent starts and stops of the wind turbine can be avoided, thereby preventing damage to the wind turbine, extending the service life of the wind turbine, shortening the wind turbine downtime, and increasing the wind turbine's power generation.

[0118] The present application also provides a device for determining the wind speed of a wind turbine restart. Figure 4 , which shows a schematic structural diagram of a wind turbine restart wind speed determination device provided by an embodiment of the present application, which may include:

[0119] A first acquisition module 41 is used to obtain the theoretical equivalent fatigue load of the wind turbine;

[0120] The first calculation module 42 is configured to calculate the maximum allowable number of cut-out times corresponding to the cut-out wind speed condition based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences;

[0121] A first determining module 43 is configured to determine a theoretical shutdown number of the wind turbine generator set based on historical wind speed data and a cut-out wind speed of the wind turbine generator set;

[0122] The minimum wind speed obtaining module 44 is used to obtain the minimum wind speed between two adjacent cut-out wind speeds based on the historical wind speed data of the wind turbine if the theoretical shutdown number is greater than the maximum allowable cut-out number; the wind speed is less than the cut-out wind speed;

[0123] The second determining module 45 is configured to determine a restart wind speed for the wind turbine generator set according to a difference between a theoretical shutdown number and a maximum allowable shutdown number and a minimum wind speed.

[0124] In an embodiment of the present application, a device for determining wind speed for restarting a wind turbine generator set is provided. The second determining module 45 may include:

[0125] The first obtaining unit is used to arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence;

[0126] The first determining unit is configured to obtain the minimum wind speed at the 1st difference position from the front to the back in the minimum wind speed sequence, and determine the minimum wind speed at the 1st difference position from the front to the back as the restart wind speed of the wind turbine generator set.

[0127] In an embodiment of the present application, a device for determining wind speed for restarting a wind turbine generator set is provided. The second determining module 45 may include:

[0128] The second obtaining unit is used to arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence;

[0129] The first acquiring unit is configured to acquire the minimum wind speed at the difference position from the front to the back of the minimum wind speed sequence;

[0130] The second obtaining unit is used to obtain the time interval between two adjacent cut-out wind speeds, and arrange the time intervals in ascending order to obtain a time interval sequence;

[0131] A third acquiring unit is configured to acquire the time interval that ranks at the 1st difference position from the front to the back in the time interval sequence, and acquire the minimum wind speed corresponding to the time interval that ranks at the 1st difference position from the front to the back;

[0132] The second determining unit is used to determine the maximum wind speed among the minimum wind speed ranked at the 1st difference position from the front to the back and the minimum wind speed corresponding to the time interval ranked at the 1st difference position from the front to the back as the restart wind speed of the wind turbine generator.

[0133] The embodiment of the present application provides a device for determining the wind speed of a wind turbine restart, which may further include:

[0134] The second calculation module is used to calculate the average restart wind speed based on the restart wind speeds of all wind turbines in the wind farm after determining the restart wind speed of the wind turbine based on the difference between the theoretical shutdown number and the maximum allowable shutdown number and the minimum wind speed;

[0135] The third determining module is configured to determine the average restart wind speed as the final restart wind speed of each wind turbine in the wind farm.

[0136] In an embodiment of the present application, a device for determining the restart wind speed of a wind turbine generator set is provided. The first calculation module 42 may include:

[0137] The calculation unit is used to calculate the maximum allowable cut-out times corresponding to the cut-out wind speed condition by a trial-and-error method based on the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition and the number of occurrences.

[0138] The embodiment of the present application provides a device for determining the wind speed of a wind turbine restart, which may further include:

[0139] The output module is used to output the restart wind speed of the wind turbine.

[0140] The present application also provides a wind turbine restart control device. Figure 5 , which shows a schematic structural diagram of a wind turbine restart control device provided by an embodiment of the present application, which may include:

[0141] The second acquisition module 51 is used to obtain the current wind speed after the wind turbine is switched off;

[0142] A determination module 52 is configured to determine whether the current wind speed is less than a restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined using any of the above-mentioned methods for determining the restart wind speed of the wind turbine generator set;

[0143] The control module 53 is configured to control the wind turbine generator set to start if the current wind speed is less than the restart wind speed of the wind turbine generator set.

[0144] The present application also provides an electronic device. Figure 6 , which shows a schematic structural diagram of an electronic device provided in an embodiment of the present application, which may include:

[0145] Memory 61, for storing computer programs;

[0146] The processor 62 is configured to implement the steps of any one of the aforementioned methods for determining the wind speed for restarting a wind turbine generator set and / or the steps of the aforementioned method for controlling the restarting of a wind turbine generator set when executing the computer program stored in the memory 61 .

[0147] The description of the relevant parts of a wind turbine restart wind speed determination device, a wind turbine restart control device and an electronic device provided in the embodiments of the present application can be found in the detailed description of the relevant parts of a wind turbine restart wind speed determination method and a wind turbine restart control method provided in the embodiments of the present application, and will not be repeated here.

[0148] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements are inherent to the elements. In the absence of further restrictions, the elements limited by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. In addition, the above-mentioned technical solutions provided in the embodiments of the present application are not described in detail in accordance with the corresponding technical solutions in the prior art to achieve the same principle, so as to avoid excessive elaboration.

[0149] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining the wind speed for restarting a wind turbine generator set, characterized in that: include: Obtain theoretical equivalent fatigue load of wind turbines; Calculate the maximum allowable cut-out times corresponding to the cut-out wind speed condition according to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, the wind turbine damage value corresponding to the non-cut-out wind speed condition, and the number of occurrences; Determining theoretical shutdown times of the wind turbine generator set based on historical wind speed data and cut-out wind speed of the wind turbine generator set; If the theoretical shutdown number is greater than the maximum allowable cut-out number, obtaining the minimum wind speed between two adjacent cut-out wind speeds based on historical wind speed data of the wind turbine generator set; The wind speed is less than the cut-out wind speed; determining a restart wind speed for the wind turbine generator set based on a difference between the theoretical shutdown number and the maximum allowable shutdown number and the minimum wind speed; Determining a restart wind speed of the wind turbine generator set according to a difference between the theoretical shutdown number and the maximum allowable shutdown number and the minimum wind speed includes: Arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence; The minimum wind speed ranked at the th difference position from the front to the back is obtained from the minimum wind speed sequence, and the minimum wind speed ranked at the th difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

2. The method for determining the wind speed for restarting a wind turbine generator set according to claim 1, wherein: Arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence; obtain the minimum wind speed ranked in the first difference position from the front to the back from the minimum wind speed sequence, and determine the minimum wind speed ranked in the first difference position from the front to the back as the restart wind speed of the wind turbine generator set. It can be replaced by: Arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence; Obtaining the minimum wind speed ranked in the first and last difference positions from the minimum wind speed sequence; Obtaining the time intervals between the two adjacent cut-out wind speeds, and arranging the time intervals in ascending order to obtain a time interval sequence; Obtaining the time interval that ranks the th difference value from the front to the back from the time interval sequence, and obtaining the minimum wind speed corresponding to the time interval that ranks the th difference value from the front to the back; The maximum wind speed among the minimum wind speed ranked at the 1st difference position from the front to the back and the minimum wind speed corresponding to the time interval ranked at the 1st difference position from the front to the back is determined as the restart wind speed of the wind turbine generator set.

3. The method for determining the wind speed for restarting a wind turbine generator set according to claim 1, wherein: After determining the restart wind speed of the wind turbine generator set according to the difference between the theoretical shutdown times and the maximum allowable shutdown times and the minimum wind speed, the method further includes: Calculating an average restart wind speed according to the restart wind speeds of all the wind turbines in the wind farm; The average restart wind speed is determined as the final restart wind speed of each wind turbine in the wind farm.

4. The method for determining the wind speed for restarting a wind turbine generator set according to claim 1, wherein: Calculating the maximum allowable cut-out times corresponding to the cut-out wind speed condition according to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition in the wind turbine operating condition, and the wind turbine damage value and occurrence times corresponding to the non-cut-out wind speed condition, including: According to the theoretical equivalent fatigue load, the wind turbine damage value corresponding to the cut-out wind speed condition, the wind turbine damage value and the number of occurrences corresponding to the non-cut-out wind speed condition, a trial-and-error method is used to calculate the maximum allowable cut-out number corresponding to the cut-out wind speed condition.

5. The method for determining the wind speed for restarting a wind turbine generator set according to claim 1, wherein: Also includes: Output the restart wind speed of the wind turbine generator set.

6. A wind turbine restart control method, characterized in that: include: When the wind turbine is cut out, obtain the current wind speed; Determining whether the current wind speed is less than the restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined by using the method for determining the restart wind speed of the wind turbine generator set according to any one of claims 1 to 5; If yes, the wind turbine generator set is controlled to start.

7. A device for determining wind speed for restarting a wind turbine generator set, characterized in that: include: The first acquisition module is used to obtain the theoretical equivalent fatigue load of the wind turbine; a first calculation module, configured to calculate a maximum allowable number of cut-out times corresponding to a cut-out wind speed condition according to the theoretical equivalent fatigue load, a wind turbine damage value corresponding to a cut-out wind speed condition in a wind turbine operating condition, a wind turbine damage value corresponding to a non-cut-out wind speed condition, and a number of occurrences; A first determining module is configured to determine a theoretical shutdown number of the wind turbine generator set based on historical wind speed data and a cut-out wind speed of the wind turbine generator set; A minimum wind speed obtaining module is configured to obtain the minimum wind speed between two adjacent cut-out wind speeds based on historical wind speed data of the wind turbine generator set if the theoretical shutdown number is greater than the maximum allowable cut-out number; The wind speed is less than the cut-out wind speed; a second determining module, configured to determine a restart wind speed of the wind turbine generator set according to a difference between the theoretical shutdown number and the maximum allowable shutdown number and the minimum wind speed; The second determination module includes: The first obtaining unit is used to arrange the minimum wind speeds in descending order to obtain a minimum wind speed sequence; The first determining unit is configured to obtain the minimum wind speed at the 1st difference position from the front to the back in the minimum wind speed sequence, and determine the minimum wind speed at the 1st difference position from the front to the back as the restart wind speed of the wind turbine generator set.

8. A wind turbine restart control device, characterized in that: include: The second acquisition module is used to obtain the current wind speed after the wind turbine is switched off; a judgment module, configured to judge whether the current wind speed is less than a restart wind speed of the wind turbine generator set; the restart wind speed of the wind turbine generator set is determined by using the method for determining the restart wind speed of the wind turbine generator set according to any one of claims 1 to 5; The control module is configured to control the wind turbine generator set to start if the current wind speed is less than the restart wind speed of the wind turbine generator set.

9. An electronic device, characterized in that: include: memory for storing computer programs; A processor is configured to implement the steps of the method for determining the wind speed of a wind turbine restart according to any one of claims 1 to 5 and / or the steps of the method for controlling the wind turbine restart according to claim 6 when executing the computer program.

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