Method, device, electronic device and computer-readable storage medium for optimizing yaw control strategy of high mountain wind farm considering turbulent wind conditions

Abstract

The present invention proposes a method for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, the method comprising: based on the total start-stop times and instantaneous start-stop times of the yaw system under the combination of n wind direction deviation angles and m delay time periods, selecting the optimal deviation angle and the optimal delay time period to generate the optimal high mountain wind farm yaw control strategy; according to the turbulence intensity, constructing a turbulence protection mechanism for the optimal high mountain wind farm yaw control strategy, comprising: when the turbulence intensity is greater than the first protection threshold, increasing the pitch angle by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than the second protection threshold, suspending the operation of the yaw system within a preset time period. Thus, based on the optimal deviation angle and the optimal delay time period, the problem of frequent start-stop of the yaw system caused by too fast wind direction changes is reduced, and the adverse effects of strong turbulence on the yaw system are reduced through the turbulence protection mechanism, thereby increasing the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of wind farms, and in particular to a method, device, electronic equipment and storage medium for optimizing a yaw control strategy for a high mountain wind farm taking into account turbulent wind conditions. Background Art

[0002] Alpine wind farms are located at high altitudes with high wind speeds. The wind is affected by the mountainous terrain, the wind direction changes quickly, and the turbulence intensity is high. The yaw systems of wind turbines in alpine wind farms often have problems such as frequent starts and stops, yaw slips, and damage to the internal structures of yaw reducers and yaw motors, resulting in power generation losses and increased operation and maintenance costs.

[0003] However, the yaw control strategy set for wind turbines at the factory is to monitor the wind direction deviation angle in real time through the wind vane and start yaw after a certain delay time, but it does not consider the impact of turbulence intensity on the yaw system. When the wind turbine performs yaw against the wind in strong turbulent wind conditions, the hydraulic system of the yaw brake is in a semi-released state, and the braking force is insufficient, which can easily cause the cabin to slip. The strong shear force generated by the cabin slip will damage the internal structure of the yaw reducer or yaw motor. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of the present invention is to propose a method for optimizing the yaw control strategy of a high mountain wind farm taking into account turbulent wind conditions. Based on the optimal deviation angle and the optimal delay time period, the problem of frequent start and stop of the yaw system caused by rapid changes in wind direction is reduced, and the adverse effects of strong turbulence on the yaw system are reduced through a turbulence protection mechanism, thereby improving its service life.

[0006] A second object of the present invention is to provide a device for optimizing the yaw control strategy of a high mountain wind farm taking into account turbulent wind conditions.

[0007] A third objective of the present invention is to provide an electronic device.

[0008] A fourth object of the present invention is to provide a non-transitory computer-readable storage medium storing computer instructions.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a method for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, wherein the yaw control strategy of the high mountain wind farm is to perform yaw control on the yaw system when the average value of the wind direction deviation angle in the initial delay time period exceeds the initial wind direction deviation angle, and the method comprises:

[0010] Obtain the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations consisting of n wind direction deviation angles and m delay time periods, and based on the total start-stop times and instantaneous start-stop times, select the optimal deviation angle and the optimal delay time period to generate the optimal high mountain wind farm yaw control strategy;

[0011] According to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy is constructed, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, the pitch angle is increased by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, the operation of the yaw system is suspended within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

[0012] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a device for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, wherein the yaw control strategy of the high mountain wind farm is that the yaw system performs yaw control when the average value of the wind direction deviation angle in the initial delay time period exceeds the initial wind direction deviation angle, and the device comprises:

[0013] A selection module is used to obtain the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations composed of n wind direction deviation angles and m delay time periods, and select the optimal deviation angle and the optimal delay time period based on the total start-stop times and the instantaneous start-stop times, so as to generate the optimal high mountain wind farm yaw control strategy;

[0014] A generation module is used to construct a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy according to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, increasing the pitch angle by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, suspending the operation of the yaw system within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

[0015] To achieve the above-mentioned purpose, the third aspect of the present invention proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect.

[0016] In order to achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0017] The method, device, electronic device and storage medium for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions provided by the embodiment of the present invention select the optimal deviation angle and the optimal delay time period based on the total start and stop times and the instantaneous start and stop times of the yaw system under the combination of n wind direction deviation angles and m delay time periods, so as to generate the optimal high mountain wind farm yaw control strategy; according to the turbulence intensity, a turbulence protection mechanism for the optimal high mountain wind farm yaw control strategy is constructed, and the turbulence protection mechanism includes: when the turbulence intensity is greater than the first protection threshold, the pitch angle is increased by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than the second protection threshold, the operation of the yaw system is suspended within a preset time period. Thus, based on the optimal deviation angle and the optimal delay time period, the problem of frequent start and stop of the yaw system caused by too fast wind direction changes is reduced, and the adverse effects of strong turbulence on the yaw system are reduced through the turbulence protection mechanism, thereby improving the service life. The additional aspects and advantages of the present invention will be partially given in the following description, and some will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic flow chart of a method for optimizing a yaw control strategy for a high mountain wind farm taking into account turbulent wind conditions provided by an embodiment of the present invention;

[0020] Figure 2 A schematic flow chart of another method for optimizing the yaw control strategy of a high mountain wind farm taking into account turbulent wind conditions provided by an embodiment of the present invention;

[0021] Figure 3 A schematic structural diagram of a device for optimizing a yaw control strategy for a high mountain wind farm taking into account turbulent wind conditions provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0024] The following describes, with reference to the accompanying drawings, a method, device, electronic device, and storage medium for optimizing a yaw control strategy for a high mountain wind farm taking into account turbulent wind conditions according to an embodiment of the present invention.

[0025] Figure 1 A flow chart of a method for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions provided by an embodiment of the present invention, wherein the yaw control strategy of the high mountain wind farm is that the yaw system performs yaw control when the average value of the wind direction deviation angle exceeds the initial wind direction deviation angle within the initial delay time period. Specifically, taking a 2MW wind turbine in a high mountain wind farm as an example, the yaw control strategy of the current version of the wind turbine unit program is an initial wind direction deviation angle of ±15°, and an initial delay time period of 30s. When the wind turbine unit main control reads the wind speed and direction data from the anemometer 50 times per second, the initial delay time period of 30s means that a total of 1500 wind direction deviation angles are read, and their average value is taken. If the average value of the wind direction deviation angle is greater than or equal to 15°, the yaw system is started for yaw control.

[0026] like Figure 1 As shown, the method comprises the following steps:

[0027] Step 101, obtain the total start and stop times and instantaneous start and stop times of the yaw system under n*m yaw control combinations consisting of n wind direction deviation angles and m delay time periods, and based on the total start and stop times and the instantaneous start and stop times, select the optimal deviation angle and the optimal delay time period to generate the optimal high mountain wind farm yaw control strategy.

[0028] In some embodiments, one yaw system start and one yaw system stop is recorded as one start-stop number, and the instantaneous start-stop number refers to the total number of times the duration from start to stop of the yaw system is less than a preset time interval.

[0029] Furthermore, when the total number of starts and stops and the number of instantaneous starts and stops are the least, the yaw system operates most safely, and the optimal deviation angle and optimal delay time period corresponding to the minimum total number of starts and stops and the number of instantaneous starts and stops are selected. Thus, when the average value of the wind direction deviation angle exceeds the optimal deviation angle in the optimal delay time period, the yaw system performs yaw control to protect the mechanical structure of the yaw system and increase the service life of the yaw system.

[0030] Step 102, based on the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, to construct a turbulence protection mechanism for the optimal high mountain wind farm yaw control strategy, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, by regulating the variable pitch system corresponding to the high mountain wind farm to increase the pitch angle to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, suspending the operation of the yaw system within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

[0031] In some embodiments, the turbulence intensity of the yaw system for 10 min is taken as an example, and the turbulence intensity I T The calculation formula can be:

[0032]

[0033] Where, V is the 10-min average wind speed, m / s;

[0034] σ is the 10-minute wind speed standard deviation, m / s.

[0035] In actual calculation, σ uses the formula:

[0036]

[0037] ν i is the sampled wind speed every 1 second within 10 minutes. The sample wind speed standard deviation here is an unbiased estimate of the population standard deviation.

[0038] Optionally, when the turbulence intensity is higher than the set value of the first protection threshold A (the A value needs to be determined according to the wind turbine operation data, which is 0.18 in this embodiment), the "turbulence protection action" is executed. At this time, the yaw system is facing the wind normally, and the wind turbine corresponding main control system controls the variable pitch system to increase the pitch angle to reduce the wind load, so as to give priority to ensuring the safety of wind turbine operation.

[0039] Optionally, when the turbulence intensity is greater than the second protection threshold B (the B value needs to be determined based on the wind turbine operation data, B>A, and is 0.2 in this embodiment), the turbulence is too large. If the yaw is steered at this time, the cabin will be at risk of slipping. Therefore, the "Turbulence is too large to temporarily suspend yaw" command is executed to immediately stop the yaw action and suspend the operation of the yaw system for 10 minutes. After 10 minutes, the yaw condition is re-judged.

[0040] Among them, suspending the operation of the yaw system within 10 minutes includes that within this 10 minutes, even if the wind direction deviation angle is greater than the initial wind direction deviation angle (15°), the yaw will not be started, and at this time only the yaw system is suspended, and the wind turbine operates normally without stopping.

[0041] The method for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions in an embodiment of the present invention selects the optimal deviation angle and the optimal delay time period based on the total start and stop times and the instantaneous start and stop times of the yaw system under the combination of n wind direction deviation angles and m delay time periods, so as to generate the optimal high mountain wind farm yaw control strategy; according to the turbulence intensity, a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy is constructed, and the turbulence protection mechanism includes: when the turbulence intensity is greater than the first protection threshold, the pitch angle is increased by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than the second protection threshold, the operation of the yaw system is suspended within a preset time period. Thus, based on the optimal deviation angle and the optimal delay time period, the problem of frequent start and stop of the yaw system caused by too fast wind direction changes is reduced, and the adverse effects of strong turbulence on the yaw system are reduced through the turbulence protection mechanism, thereby increasing the service life.

[0042] In order to clearly explain the above embodiment, Figure 2 A schematic flow chart of another method for optimizing the yaw control strategy of a high mountain wind farm taking into account turbulent wind conditions provided by an embodiment of the present invention.

[0043] Step 201 : dividing the wind direction deviation angle interval corresponding to the yaw system into n deviation angles with equal angle intervals, and dividing the delay time interval corresponding to the yaw system into m delay time periods with equal time intervals.

[0044] In some embodiments, n is determined based on a wind direction deviation angle interval, and m is determined based on a delay time interval.

[0045] Optionally, when the wind direction deviation angle interval is [15°, 45°], it is divided into 30 (n) levels with equal angle intervals of 1°.

[0046] Optionally, when the delay time interval is [30s, 120s], it is divided into 9 levels (m) with an equal time interval of 10s.

[0047] Step 202 , combining the n levels of deviation angles and the m equally spaced delay time periods into a yaw control strategy for a high mountain wind farm, so as to obtain n*m types of yaw control combinations of deviation angles and delay time periods.

[0048] Optionally, when n is 30 and m is 9, there are 270 yaw control combinations of deviation angles and delay time periods, such as [16°, 40s], [17°, 40s], and [17°, 50s].

[0049] Step 203, obtaining the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations.

[0050] The total number of starts and stops and the number of instantaneous starts and stops can be obtained from the fan data acquisition and supervisory control system (SCADA).

[0051] Step 204 : Based on the total start and stop times and the instantaneous start and stop times, the optimal deviation angle and the optimal delay time period among the n*m ​​yaw control combinations are selected to optimize the yaw control strategy of the high mountain wind farm.

[0052] In some embodiments, based on the total number of starts and stops and the number of instantaneous starts and stops, the optimal deviation angle and the optimal delay time period are selected from n*m yaw control combinations to optimize the yaw control strategy of a high mountain wind farm. An implementation method can be to obtain the first influence weight and the second influence weight of the total number of starts and stops and the instantaneous number of starts and stops on the operational safety of the high mountain wind farm, respectively, wherein the first influence weight and the second influence weight are equal; based on the first influence weight, the second influence weight, the total number of starts and stops and the instantaneous number of starts and stops, an evaluation index for the operational safety of the high mountain wind farm is constructed; the target deviation angle interval and the target delay time period corresponding to the minimum evaluation index are used as the optimal deviation angle and the optimal delay time period in the n*m ​​yaw control combinations to optimize the yaw control strategy of the high mountain wind farm.

[0053] Furthermore, when the total number of starts and stops is x1 and the number of instantaneous starts and stops is x2, the evaluation index y is defined as:

[0054] y=0.5·x1+0.5·x2

[0055] Among them, because too many starts and stops of the yaw system will aggravate structural wear, impact damage and fatigue damage, and instantaneous starts and stops will have a greater impact on the structure, the smaller the evaluation index y value, the better. Therefore, it is necessary to consider the total number of starts and stops x1 and the instantaneous number of starts and stops x2 at the same time. In this embodiment, the first influence weight and the second influence weight are each 0.5.

[0056] Optionally, the yaw control combination corresponding to the minimum value of the evaluation index y is the optimal yaw control combination. In this embodiment, the optimal yaw control combination may be [20°, 60s], that is, the initial wind direction deviation angle is increased from 15° to 20°, and the initial delay time period is increased from 30s to 60s.

[0057] Step 205, based on the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, to construct a turbulence protection mechanism for the optimal high mountain wind farm yaw control strategy, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, by regulating the variable pitch system corresponding to the high mountain wind farm to increase the pitch angle to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, suspending the operation of the yaw system within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

[0058] It should be noted that, for the specific implementation of step 205, reference may be made to the relevant description in the above embodiment.

[0059] An embodiment of the present invention provides an optimization method for the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, wherein the yaw control strategy of the high mountain wind farm is to perform yaw control on the yaw system when the average value of the wind direction deviation angle within the initial delay time period exceeds the initial wind direction deviation angle, by dividing the wind direction deviation angle interval corresponding to the yaw system into n deviation angles with equal angle intervals, and dividing the delay time interval corresponding to the yaw system into m delay time periods with equal time intervals; combining n*m yaw control combinations of deviation angles and delay time periods; based on the total start and stop times and instantaneous start and stop times of the yaw system under the n*m ​​yaw control combinations, selecting the optimal deviation angle and the optimal delay time period to generate the optimal high mountain wind farm yaw control strategy, and constructing the turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy according to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm. In this way, on the one hand, the problem of frequent start and stop of the yaw system caused by rapid changes in wind direction can be reduced; on the other hand, by real-time calculation and monitoring of turbulence intensity, a turbulence protection mechanism can be formed to reduce and passivate the adverse effects of strong turbulence on the yaw system, protect the mechanical structure of the yaw system, and increase the service life of the yaw system.

[0060] In order to implement the above embodiment, the present invention further proposes a device for optimizing the yaw control strategy of a high mountain wind farm taking into account turbulent wind conditions.

[0061] Figure 3 A schematic structural diagram of a device for optimizing a yaw control strategy for a high mountain wind farm taking into account turbulent wind conditions provided by an embodiment of the present invention.

[0062] like Figure 3 As shown, the high mountain wind farm yaw control strategy optimization device 30 considering turbulent wind conditions includes: a selection module 31 and a generation module 32.

[0063] A selection module 31 is used to obtain the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations formed by n wind direction deviation angles and m delay time periods, and select the optimal deviation angle and the optimal delay time period based on the total start-stop times and the instantaneous start-stop times, so as to generate the optimal high mountain wind farm yaw control strategy;

[0064] A generation module 32 is used to construct a turbulence protection mechanism for the optimal high mountain wind farm yaw control strategy according to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, increasing the pitch angle by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, suspending the operation of the yaw system within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

[0065] Furthermore, in a possible implementation of the embodiment of the present invention, the selection module 31 includes:

[0066] A division unit, used to divide the wind direction deviation angle interval corresponding to the yaw system into n deviation angles with equal angle intervals, and divide the delay time interval corresponding to the yaw system into m delay time periods with equal time intervals;

[0067] A combination unit, used for combining the n levels of deviation angles and the m equally spaced delay time periods to perform a yaw control strategy combination of a high mountain wind farm, so as to obtain n*m types of yaw control combinations of deviation angles and delay time periods;

[0068] An acquisition unit, used for acquiring a total start-stop number and an instantaneous start-stop number of yaw control performed by the yaw system under the n*m ​​yaw control combinations;

[0069] The optimization unit is used to select the optimal deviation angle and the optimal delay time period from the n*m ​​yaw control combinations based on the total start-stop number and the instantaneous start-stop number, so as to generate the optimal high mountain wind farm yaw control strategy.

[0070] Furthermore, in a possible implementation manner of the embodiment of the present invention, the optimization unit is specifically configured to:

[0071] Obtaining a first impact weight and a second impact weight of the total start-stop number and the instantaneous start-stop number on the operational safety of the high mountain wind farm, respectively, wherein the first impact weight and the second impact weight are equal;

[0072] Based on the first impact weight, the second impact weight, the total number of starts and stops, and the number of instantaneous starts and stops, construct an evaluation index for the operation safety of the high mountain wind farm;

[0073] The target deviation angle interval and target delay time period corresponding to the minimum of the evaluation index are used as the optimal deviation angle and optimal delay time period in the n*m ​​yaw control combinations to generate the optimal high mountain wind farm yaw control strategy.

[0074] Furthermore, in a possible implementation of an embodiment of the present invention, one yaw system start and one yaw system stop are recorded as one start-stop number, and the instantaneous start-stop number refers to the total number of times that the duration from start to stop of the yaw system is less than a preset time interval.

[0075] Furthermore, in a possible implementation manner of an embodiment of the present invention, n is determined based on the wind direction deviation angle interval, and m is determined based on the delay time interval.

[0076] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and will not be repeated here.

[0077] The high mountain wind farm yaw control strategy optimization device considering turbulent wind conditions in the embodiment of the present invention selects the optimal deviation angle and the optimal delay time period based on the total start and stop times and the instantaneous start and stop times of the yaw system under the combination of n wind direction deviation angles and m delay time periods, so as to generate the optimal high mountain wind farm yaw control strategy; according to the turbulence intensity, a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy is constructed, and the turbulence protection mechanism includes: when the turbulence intensity is greater than the first protection threshold, the pitch angle is increased by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than the second protection threshold, the operation of the yaw system is suspended within a preset time period. Thus, based on the optimal deviation angle and the optimal delay time period, the problem of frequent start and stop of the yaw system caused by too fast wind direction changes is reduced, and the adverse effects of strong turbulence on the yaw system are reduced through the turbulence protection mechanism, thereby increasing the service life.

[0078] In order to implement the above embodiment, the present invention further provides an electronic device, including:

[0079] at least one processor; and

[0080] a memory communicatively connected to the at least one processor; wherein,

[0081] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the aforementioned method.

[0082] In order to implement the above embodiment, the present invention further proposes a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are used to enable the computer to execute the above method.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0086] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0087] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0088] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0089] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0090] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, characterized in that: in, The yaw control strategy of the high mountain wind farm is to perform yaw control on the yaw system when the average wind direction deviation angle in the initial delay time period exceeds the initial wind direction deviation angle. The method includes: Obtain the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations formed by n wind direction deviation angles and m delay time periods, and select the optimal deviation angle and the optimal delay time period based on the total start-stop times and the instantaneous start-stop times, so as to generate the optimal high mountain wind farm yaw control strategy, wherein n is determined based on angle intervals such as the wind direction deviation angle interval, m is determined based on time intervals such as the delay time interval, one yaw system start and one yaw system stop are recorded as one start-stop times, and the instantaneous start-stop times refer to the total number of times that the duration from start to stop of the yaw system is less than a preset time interval; According to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy is constructed, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, the pitch angle is increased by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, the operation of the yaw system is suspended within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

2. The method according to claim 1, characterized in that Obtaining the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations formed by the n wind direction deviation angles and m delay time periods, and selecting the optimal deviation angle and the optimal delay time period based on the total start-stop times and the instantaneous start-stop times to generate the optimal high mountain wind farm yaw control strategy, including: Dividing the wind direction deviation angle interval corresponding to the yaw system into n deviation angles with equal angle intervals, and dividing the delay time interval corresponding to the yaw system into m delay time periods with equal time intervals; Combining the n levels of deviation angles and the m equally spaced delay time periods with a high mountain wind farm yaw control strategy to obtain n*m types of yaw control combinations of deviation angles and delay time periods; Obtaining the total start-stop times and instantaneous start-stop times of yaw control performed by the yaw system under the n*m ​​yaw control combinations; Based on the total start-stop times and the instantaneous start-stop times, the optimal deviation angle and the optimal delay time period among the n*m ​​yaw control combinations are selected to generate an optimal high mountain wind farm yaw control strategy.

3. The method according to claim 2, characterized in that The method of selecting an optimal deviation angle and an optimal delay time period from among n*m yaw control combinations based on the total start-stop times and the instantaneous start-stop times to generate an optimal high mountain wind farm yaw control strategy includes: Obtaining a first impact weight and a second impact weight of the total start-stop number and the instantaneous start-stop number on the operational safety of the high mountain wind farm, respectively, wherein the first impact weight and the second impact weight are equal; Based on the first impact weight, the second impact weight, the total number of starts and stops, and the number of instantaneous starts and stops, construct an evaluation index for the operation safety of the high mountain wind farm; The target deviation angle interval and target delay time period corresponding to the minimum of the evaluation index are used as the optimal deviation angle and optimal delay time period in the n*m ​​yaw control combinations to generate the optimal high mountain wind farm yaw control strategy.

4. A device for optimizing the yaw control strategy of a high mountain wind farm considering turbulent wind conditions, characterized in that: in, The yaw control strategy of the high mountain wind farm is to perform yaw control on the yaw system when the average wind direction deviation angle in the initial delay time period exceeds the initial wind direction deviation angle. The device comprises: A selection module is used to obtain the total start-stop times and instantaneous start-stop times of the yaw system under n*m yaw control combinations formed by n wind direction deviation angles and m delay time periods, and select the optimal deviation angle and the optimal delay time period based on the total start-stop times and the instantaneous start-stop times, so as to generate the optimal high mountain wind farm yaw control strategy, wherein n is determined based on angle intervals such as wind direction deviation angle intervals, m is determined based on time intervals such as delay time intervals, one yaw system start and one yaw system stop are recorded as one start-stop number, and the instantaneous start-stop number refers to the total number of times the duration from start to stop of the yaw system is less than a preset time interval; A generation module is used to construct a turbulence protection mechanism of the optimal high mountain wind farm yaw control strategy according to the turbulence intensity of the turbulent wind conditions corresponding to the high mountain wind farm, wherein the turbulence protection mechanism includes: when the turbulence intensity is greater than a first protection threshold, increasing the pitch angle by regulating the variable pitch system corresponding to the high mountain wind farm to reduce the wind load; when the turbulence intensity is greater than a second protection threshold, suspending the operation of the yaw system within a preset time period to stop yaw, and the second protection threshold is greater than the first protection threshold.

5. The device according to claim 4, characterized in that The selection module comprises: A division unit, used to divide the wind direction deviation angle interval corresponding to the yaw system into n deviation angles with equal angle intervals, and divide the delay time interval corresponding to the yaw system into m delay time periods with equal time intervals; A combination unit, used for combining the n levels of deviation angles and the m equally spaced delay time periods to perform a yaw control strategy combination of a high mountain wind farm, so as to obtain n*m types of yaw control combinations of deviation angles and delay time periods; An acquisition unit, used for acquiring a total start-stop number and an instantaneous start-stop number of yaw control performed by the yaw system under the n*m ​​yaw control combinations; The optimization unit is used to select the optimal deviation angle and the optimal delay time period from the n*m ​​yaw control combinations based on the total start-stop number and the instantaneous start-stop number, so as to generate the optimal high mountain wind farm yaw control strategy.

6. The device according to claim 5, characterized in that The optimization unit is specifically used for: Obtaining a first impact weight and a second impact weight of the total start-stop number and the instantaneous start-stop number on the operational safety of the high mountain wind farm, respectively, wherein the first impact weight and the second impact weight are equal; Based on the first impact weight, the second impact weight, the total number of starts and stops, and the number of instantaneous starts and stops, construct an evaluation index for the operation safety of the high mountain wind farm; The target deviation angle interval and target delay time period corresponding to the minimum of the evaluation index are used as the optimal deviation angle and optimal delay time period in the n*m ​​yaw control combinations to generate the optimal high mountain wind farm yaw control strategy.

7. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 3.

8. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-3.

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