Yaw lubrication control method and yaw lubrication control device for wind turbine generator set

Abstract

A yaw lubrication control method and a yaw lubrication control device for a wind turbine generator set are provided. The yaw lubrication control method comprises: determining the accumulated yaw duration of the wind turbine generator set; comparing the accumulated yaw duration with a predetermined yaw duration; in response to the accumulated yaw duration being greater than or equal to the predetermined yaw duration, controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set. The yaw lubrication control method of the present invention can control the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set based on the accumulated yaw duration of the wind turbine generator set, thereby ensuring that the yaw bearing is properly lubricated or lubricated in time, and preventing over-lubrication or insufficient lubrication.

Description

Technical Field

[0001] The present invention relates to the field of wind power generation, and more particularly to a yaw lubrication control method and a yaw lubrication control device for a wind power generator set. Background Art

[0002] Modern large wind turbines are generally equipped with a yaw system. The yaw system is mainly used to quickly and smoothly align the wind direction when the direction of the wind speed vector changes, so that the wind turbine can obtain the maximum wind energy. Therefore, the yaw system is very important for wind turbines.

[0003] However, under actual working conditions, the wind force changes in a complex manner (for example, the wind direction changes frequently, the wind force changes greatly, etc.), which causes the yaw system to start frequently. In addition, since the overall mass of the nacelle-generator-impeller is large, and during the yaw process of the unit, it may be necessary to overcome the thrust of the wind on the impeller surface, the yaw bearing in the yaw system bears a large load.

[0004] Therefore, in order to make the yaw system work properly, the lubrication of the yaw system is particularly important. At present, a lubrication system for the yaw system is usually designed in a wind turbine. However, the lubrication system of the yaw system usually sets a certain time interval as a triggering condition for the lubrication system, which may cause insufficient or excessive lubrication of the yaw bearing, thereby affecting the normal operation of the yaw system and then affecting the normal power generation of the wind turbine. Summary of the invention

[0005] The object of the present invention is to provide a yaw lubrication control method and a yaw lubrication control device for a wind turbine generator set.

[0006] One aspect of the present invention provides a yaw lubrication control method for a wind turbine generator set, characterized in that the yaw lubrication control method includes: determining the cumulative yaw duration of the wind turbine generator set; comparing the cumulative yaw duration with a predetermined yaw duration; in response to the cumulative yaw duration being greater than or equal to the predetermined yaw duration, controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set.

[0007] Optionally, in response to the cumulative yaw duration being greater than or equal to a predetermined yaw duration, the step of controlling the lubrication system of the wind turbine to lubricate the yaw bearing of the wind turbine includes: in response to the cumulative yaw duration being greater than or equal to a predetermined yaw duration, acquiring operating data of the wind turbine; based on the operating data of the wind turbine, controlling the lubrication system of the wind turbine to lubricate the yaw bearing of the wind turbine.

[0008] Optionally, the step of controlling the lubrication system of the wind turbine to lubricate the yaw bearing includes: calculating an additional first power obtained by correcting the wind turbine's deviation angle to the wind based on first operating data of the wind turbine, the first operating data including a current wind speed, a design output power of the wind turbine corresponding to the current wind speed and the wind deviation angle; calculating a second power lost by the wind turbine during yaw at the wind deviation angle based on second operating data of the wind turbine, the second operating data including the number of yaw motors of the wind turbine, the rated power of the yaw motor, the power factor of the yaw motor and the loss margin of the yaw motor; in response to the first power being less than the second power, controlling the lubrication system of the wind turbine to lubricate the yaw bearing.

[0009] Optionally, based on the operating data of the wind turbine generator set, the step of controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set includes: in response to the current wind speed in the operating data being lower than or equal to a predetermined wind speed, controlling the wind turbine generator set to shut down, and controlling the wind turbine generator set to yaw in a predetermined direction at a predetermined angle; while controlling the wind turbine generator set to yaw in a predetermined direction at a predetermined angle, lubricating the yaw bearing.

[0010] Optionally, based on the operating data of the wind turbine generator set, the step of controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set includes: in response to an average value of the wind speed within a predetermined time in the operating data being lower than a predetermined wind speed threshold, controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set.

[0011] Optionally, the yaw lubrication control method further includes: determining a remaining amount of grease in a grease container of the lubrication system; and in response to the remaining amount being less than or equal to a predetermined warning threshold, controlling the issuance of an alarm signal indicating that the grease container is insufficiently filled with grease.

[0012] Optionally, the step of determining the remaining amount of grease in the grease container of the lubrication system includes: accumulating the greasing time of the lubrication system of the wind turbine generator set; obtaining the greasing rate during normal greasing; and determining the difference between the total capacity of the grease container of the lubrication system and the product of the greasing time and the greasing rate as the remaining amount of grease in the grease container.

[0013] Optionally, the yaw lubrication control method further comprises: in response to completion of adding grease to the grease container, resetting the grease adding time to 0.

[0014] Optionally, the yaw lubrication control method further includes: in response to lubricating the yaw bearing of the wind turbine generator set for a lubrication cycle, clearing the accumulated yaw duration of the wind turbine generator set, and returning to the step of determining the accumulated yaw duration of the wind turbine generator set.

[0015] Optionally, while lubricating the yaw bearing of the wind turbine generator set, the method further comprises: unbending the wind turbine generator set.

[0016] Another aspect of the present invention provides a device for controlling the yaw lubrication of a wind turbine generator set, characterized in that the device includes: a cumulative yaw duration statistics module, configured to count the cumulative yaw duration of the wind turbine generator set; a duration comparison module, configured to compare the cumulative yaw duration with a predetermined yaw duration; and a lubrication control module, configured to: when the cumulative yaw duration is greater than or equal to the predetermined yaw duration, use the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set.

[0017] Another aspect of the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, any of the yaw lubrication control methods described above is implemented.

[0018] Another aspect of the present invention provides a controller for a wind turbine generator set, the controller comprising: a processor; a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, it implements any of the yaw lubrication control methods described above.

[0019] The yaw lubrication control method of the present invention can control the lubrication system of the wind turbine to lubricate the yaw bearing of the wind turbine based on the accumulated yaw time of the wind turbine, thereby ensuring that the yaw bearing is lubricated appropriately or in time to prevent over-lubrication or under-lubrication.

[0020] In addition, the yaw lubrication control method of the present invention can lubricate the yaw bearing of the wind turbine generator set and untwist the wind turbine generator set at the same time, thereby reducing the twisting degree of the power cable and ensuring the safe and stable operation of the unit.

[0021] In addition, the yaw lubrication control method of the present invention can be executed cyclically, thereby ensuring smooth lubrication for a long time.

[0022] In addition, the yaw lubrication control method of the present invention can control lubrication based on the operation data of the wind turbine generator set when the accumulated yaw time of the wind turbine generator set is satisfied. Therefore, lubrication can be controlled more accurately to prevent over-lubrication or under-lubrication.

[0023] In addition, the yaw lubrication control method of the present invention can perform lubrication according to predetermined conditions under conditions other than when the unit is shut down due to low wind (i.e., when the unit is generating electricity normally), thereby greatly relaxing the triggering conditions of the automatic lubrication system and ensuring that the yaw bearing is lubricated in a timely manner.

[0024] In addition, the yaw lubrication control method of the present invention can consider the relationship between the additional first power obtained by correcting the wind turbine's deviation angle to the wind and the second power lost by the wind turbine during the yaw deviation angle to control the lubrication system of the wind turbine to lubricate the yaw bearing. On the one hand, this can reduce the yaw frequency of the unit in the low wind speed section and reduce the unit's own losses. On the other hand, it can expand the conditions for starting the unit's automatic lubrication system to ensure that the unit's yaw bearing (for example, the yaw bearing body and the yaw bearing outer gear ring) is fully lubricated to prevent over-lubrication or insufficient lubrication.

[0025] In addition, the yaw lubrication control method of the present invention can obtain the hardware configuration of the unit (for example, the number of yaw motors, rated power, etc.) to automatically determine the operating conditions for starting the automatic lubrication system of the unit. By stopping the yaw action and using the reduced yaw time to trigger the action of the lubrication system, the unit's own losses at low wind speeds can be reduced, while ensuring that the unit's yaw bearings and / or outer gear rings are fully lubricated.

[0026] In addition, the yaw lubrication control method of the present invention can automatically send out an alarm signal when the grease in the grease container of the lubrication system is insufficient, thereby ensuring the stable and safe operation of the lubrication system.

[0027] In addition, the yaw lubrication control method of the present invention can estimate the amount of remaining grease in the grease container only by collecting relevant operating parameters of the lubrication system (ie, grease adding time, grease adding rate), thereby eliminating the need for additional sensors and avoiding additional cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects and features of the present invention will become more apparent through the following description in conjunction with the accompanying drawings which exemplarily illustrate an example, in which:

[0029] Figure 1 A yaw lubrication control method for a wind turbine generator set according to an exemplary embodiment of the present invention is shown;

[0030] Figure 2 shows a lubrication system according to an example embodiment of the present invention;

[0031] Figure 3 A method for controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an exemplary embodiment of the present invention is shown;

[0032] Figure 4 A method for controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an embodiment of the present invention is shown;

[0033] Figure 5A method for controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an embodiment of the present invention is shown;

[0034] Figure 6 An alarm prediction method of a yaw lubrication control method according to an exemplary embodiment of the present invention is shown;

[0035] Figure 7 A flow chart of determining a remaining amount of grease in a grease container of a lubrication system according to an exemplary embodiment of the present invention is shown.

[0036] Figure 8 A yaw lubrication control device for a wind turbine generator set according to an exemplary embodiment of the present invention is shown;

[0037] Fig. 9 A block diagram of a controller of a wind turbine generator system according to an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0038] Hereinafter, various exemplary embodiments will be described in detail with reference to the accompanying drawings. These exemplary embodiments are provided to specifically describe the technical ideas of the inventive concept, but are not intended to restrict the scope of the inventive concept. It should be understood that all modifications that can be easily obtained by those skilled in the art from this specification and these exemplary embodiments fall within the scope of the inventive concept.

[0039] It will be understood that when the term “comprising” is used in this specification, it specifies the presence of stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0040] It will also be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. As used herein, the term "and / or" includes any and all combinations of one or more related listed items. When a statement such as "at least one of..." follows a column of elements, the statement modifies the entire column of elements, rather than modifying a single element of the column.

[0041] In the present invention, the yaw lubrication control method of the wind turbine generator set can be controlled by a controller for controlling lubrication in the wind turbine generator set or a fan master in the wind turbine generator set to control the lubrication system of the wind turbine generator set to lubricate the parts of the wind turbine generator set that need lubrication.

[0042] The lubrication system and the yaw lubrication control method will be described in detail below in combination with various exemplary embodiments.

[0043] Figure 1 A lubrication system according to an example embodiment of the invention is shown.

[0044] Reference Figure 1 The lubrication system may include a system body 1, a grease distributor 2, a felt tooth lubricator 3 and a yaw bearing body 4.

[0045] The system body 1 may include a drive motor 11, a grease container 12, and a switch pipeline 13. Here, the drive motor 11 may control the switch pipeline 13 so that the grease in the grease container 12 may be output to the outside of the grease container 12 through the switch pipeline 13. For example, when the drive motor 11 receives a lubrication instruction, the drive motor 11 drives the eccentric wheel through the motor, thereby driving the plunger to move, sucking lubricant from the grease container 12, and delivering it to each lubrication point (felt tooth lubricator 3 or yaw bearing body) through the switch pipeline 13 and the grease distributor 12. For example, the drive motor 11 may be controlled by a controller (not shown) for controlling lubrication in a wind turbine generator set, and performs one or more of the above operations in response to the lubrication instruction received from the controller.

[0046] Here, the grease dispenser 2 may receive grease from the switch line 13 and distribute the grease. The felt tooth lubricator 3 may be used to lubricate the outer tooth surface of the yaw bearing using the grease distributed by the grease dispenser 12. In addition, the interior of the yaw bearing body 4 may be lubricated by injecting grease through at least one grease nozzle (e.g., four grease nozzles, for example). For example, the grease dispenser 2 may receive and distribute grease under the control of a controller for controlling lubrication in a wind turbine generator set.

[0047] Although Figure 1 The lubrication system is shown, but this is not for the purpose of limiting the specific structure or specific components of the lubrication system, but for the purpose of illustrating the overall working principle of the lubrication system. That is, the lubrication system of the present invention is not limited to Figure 1 The specific structures and specific components shown may include any other structures and components, or may not include Figure 1 At least one of the specific structures and specific components shown. In addition, the controller for controlling lubrication in the wind turbine generator set is not limited to controlling all components in the lubrication system, but can be used to control some components in the lubrication system.

[0048] Figure 2 A yaw lubrication control method for a wind turbine generator system according to an exemplary embodiment of the present invention is shown.

[0049] Reference Figure 2In step S210, the accumulated yaw time of the wind turbine generator set is determined.

[0050] Here, the accumulated yaw time may indicate the accumulated working time length of the yaw system of the wind turbine. For example, the accumulated yaw time may be determined during the operation of the wind turbine (or simply referred to as a wind turbine). The starting yaw time for starting to accumulate the yaw time of the yaw system may be predefined, and the present invention does not impose any restrictions on the starting yaw time of the accumulated yaw time.

[0051] In a non-limiting example, the starting yaw time may be the moment when the wind turbine generator set is fully lubricated. For example, when the wind turbine generator set is fully lubricated, the accumulated yaw time may be initialized to 0.

[0052] In the present invention, the accumulated yaw duration of the wind turbine generator set can be determined by various existing methods or technologies. For example, the accumulated yaw duration of the wind turbine generator set can be determined by setting a timer for timing the accumulated yaw duration of the wind turbine generator set. For another example, the accumulated yaw duration of the wind turbine generator set can be determined by monitoring or accumulating the working time of the yaw motor. However, the above examples are only exemplary, and the present invention does not limit the method for determining the accumulated yaw duration of the wind turbine generator set.

[0053] In addition, in one example, the accumulated yaw duration can be stored in the power-off retention area of ​​the PLC control system of the wind turbine generator set. In this example, if the machine is shut down due to power failure of the power grid, the accumulated yaw duration data can also be read after the machine is restarted.

[0054] In step S220, the accumulated deviation duration is compared with the predetermined deviation duration.

[0055] Here, the predetermined yaw duration may be a parameter pre-set to trigger the lubrication system of the unit. For example, the predetermined yaw duration may be determined based on engineering experience, operating status, model, operating environment, etc. of the wind turbine. In one example, the predetermined yaw duration may be 350 hours. However, the predetermined yaw duration in the above example is only exemplary, and the present invention does not impose specific limitations on the predetermined yaw duration. For example, the predetermined yaw duration may be a predefined constant. For another example, the predetermined yaw duration may be a variable. For example, the predetermined yaw duration may change according to the operating conditions of the wind turbine.

[0056] In step S230 , in response to the accumulated yaw duration being greater than or equal to a predetermined yaw duration, the lubrication system of the wind turbine generator set is controlled to lubricate the yaw bearing of the wind turbine generator set.

[0057] When the accumulated yaw duration is greater than or equal to the predetermined yaw duration, the lubrication system of the wind turbine generator set may be controlled to lubricate the yaw bearing.

[0058] For example, in combination Figure 1 In response to the accumulated yaw duration being greater than or equal to the predetermined yaw duration, the controller can control at least one component in the lubrication system of the wind turbine generator set (e.g., at least one of the drive motor 11, the switch pipeline 13, the grease distributor 2, and the felt tooth lubricator 3) to lubricate the yaw bearing of the wind turbine generator set. Figure 1 The basic principle of lubrication has been schematically illustrated, and for the sake of brevity, a detailed description of how lubrication is performed or controlled will not be repeated here.

[0059] Furthermore, optionally, in response to the accumulated yaw duration being less than a predetermined yaw duration, the accumulated yaw duration may continue to be accumulated and / or determined, and the lubrication system of the wind turbine generator set may not be controlled to lubricate the yaw bearing of the wind turbine generator set, thereby avoiding over-lubrication.

[0060] Here, the yaw bearing to be lubricated may include an internal gear of the yaw bearing, an external gear of the yaw bearing and / or an external gear ring. In one example, the yaw bearing to be lubricated may include an internal large gear of the yaw bearing and / or an external large gear of the yaw bearing. However, the internal large gear of the yaw bearing and / or the external large gear of the yaw bearing in the above examples are only exemplary, and the present invention does not specifically limit the specific parts to be lubricated, and other parts that need to be lubricated are also feasible.

[0061] In the prior art, the lubrication system of the yaw system usually sets a certain time interval as the triggering condition of the lubrication system, which may lead to insufficient or excessive lubrication of the yaw bearing. More specifically, within a certain time interval, if the wind turbine is shut down due to low wind, failure, etc., the actual yaw time of the unit is short, resulting in excessive lubrication of the wind turbine, or if the wind turbine yaws frequently due to good wind conditions on site, the yaw shaft may be insufficiently lubricated. Insufficient or excessive yaw lubrication may cause damage to the yaw bearing.

[0062] In comparison, the yaw lubrication control method of the present invention can control the lubrication system of the wind turbine to lubricate the yaw bearing of the wind turbine based on the accumulated yaw time of the wind turbine, thereby ensuring that the yaw bearing is lubricated appropriately or in time to prevent over-lubrication or under-lubrication.

[0063] In addition, optionally, while lubricating the yaw bearing of the wind turbine generator set, the yaw lubrication control method of the wind turbine generator set according to an exemplary embodiment of the present invention may also include unbending the wind turbine generator set, thereby reducing the degree of twisting of the power cable and ensuring the safe and stable operation of the unit.

[0064] Untwisting refers to the operation of restoring the cable connected to the wind turbine generator set to an untwisted or only partially twisted state due to yaw. The cable can be restored to an untwisted or only partially twisted state by untwisting. Optionally, untwisting can be performed by a cable untwisting system in the wind turbine generator set. In one example, the cable untwisting system can perform cable untwisting under control in the wind turbine generator set.

[0065] In addition, in an optional embodiment, the yaw lubrication control method of the present invention may further include the following steps: in response to lubricating the yaw bearing of the wind turbine generator set for a lubrication cycle, the accumulated yaw duration of the wind turbine generator set is cleared, and the accumulated yaw duration of the wind turbine generator set is restarted (i.e., returned to determine).

[0066] Here, lubricating the yaw bearing of the wind turbine generator set for one lubrication cycle may indicate that the yaw bearing of the wind turbine generator set has been fully lubricated. The time when the yaw bearing of the wind turbine generator set has been fully lubricated may be re-determined as the starting yaw time accumulated by accumulating the yaw time of the yaw system introduced in reference to step S210. Furthermore, the control of the wind turbine generator set may re-execute steps S210, S220, and S230 based on the re-determined starting yaw time. Therefore, the yaw lubrication control method of the invention may be executed cyclically, thereby ensuring smooth lubrication for a long time. In one example, the lubrication cycle may be determined according to actual needs or operating conditions. For example, as a non-limiting example, one lubrication cycle may indicate that the unit yaws one circle (i.e., 360 degrees).

[0067] Figure 3 A method of controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an exemplary embodiment of the present invention is shown.

[0068] In step S310, in response to the accumulated yaw duration being greater than or equal to a predetermined yaw duration, operation data of the wind turbine generator set may be acquired.

[0069] Here, the operation data of the wind turbine generator set may include various data indicating the operation status of the wind turbine generator set. For example, as an example only, the operation data of the wind turbine generator set may include grid-connected power, generator speed, wind direction deviation angle, wind speed and / or various operation parameters of the yaw motor.

[0070] In the present invention, the operation data of the wind turbine generator set can be obtained by various existing technologies or methods. For example, the operation data of the wind turbine generator set can be obtained by various sensors or a database storing historical operation data. However, the above method of obtaining the operation data of the wind turbine generator set is only an example, and the present invention does not limit the specific method of obtaining the operation data of the wind turbine generator set.

[0071] In step S320, based on the operating data of the wind turbine generator set, the lubrication system of the wind turbine generator set may be controlled to lubricate the yaw bearing of the wind turbine generator set.

[0072] In other words, when the accumulated yaw duration is greater than or equal to the predetermined yaw duration, the lubrication system of the wind turbine generator set may be controlled to lubricate the yaw bearing of the wind turbine generator set based on the operation data of the wind turbine generator set.

[0073] Here, since lubrication is controlled based on the operation data of the wind turbine generator set when the accumulated yaw time of the wind turbine generator set is satisfied, lubrication can be controlled more accurately to prevent over-lubrication or under-lubrication. Figure 4 and Figure 5 Step S320 is described in more detail.

[0074] Figure 4 A method for controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an embodiment of the present invention is shown.

[0075] Reference Figure 4 In step S410, additional first power obtained by correcting the wind deviation angle of the wind turbine generator set may be calculated based on first operating data of the wind turbine generator set.

[0076] Here, the first operating data may include the current wind speed, the designed output power of the wind turbine generator set corresponding to the current wind speed, and the wind deviation angle. The wind deviation angle may be in degrees, and the wind deviation angle may be averaged over a certain time period (for example, an average value within 60 seconds). The designed output power may be in kilowatts.

[0077] In one embodiment, the first power may be determined based on the product of the design output power of the wind turbine generator set corresponding to the current wind speed and the first value. For example, the first value may be 1 minus the square of the cosine value of the wind deviation angle. For example, the first power may be expressed as equation (1):

[0078] P1=p e (v)(1-cos 2 β) Equation (1)

[0079] In equation (1), P1 may represent the first power, p e (v) may represent the designed output power of the wind turbine generator set corresponding to the current wind speed, and β may represent the wind deviation angle.

[0080] In step S420 , a second power loss of the wind turbine generator set during a yaw-to-wind deviation angle may be calculated based on second operating data of the wind turbine generator set.

[0081] Here, the second operating data may include the number of yaw motors of the wind turbine generator set, the rated power of the yaw motor, the power factor of the yaw motor, and the loss margin of the yaw motor. For example, the loss margin of the yaw motor may indicate a loss margin parameter for controlling the setting of the working power range of the startup lubrication.

[0082] In one embodiment, the second power is determined based on the sum of the loss margin of the yaw motor and a second value, wherein the second value is the product of the number of yaw motors, the rated power of the yaw motor, and the power factor of the yaw motor. For example, the second power can be expressed as equation (2):

[0083] P2=n*p n *γ(p)+δ Equation (2)

[0084] In equation (2), P2 may represent the second power, n may represent the number of yaw motors, and p n It can represent the rated power of a single yaw motor, γ(p) can represent the power factor of the yaw motor and is related to the output power of the wind turbine, and δ can represent the loss margin of the yaw motor.

[0085] In step S430, in response to the first power being less than the second power, a lubrication system of the wind turbine generator set may be controlled to lubricate the yaw bearing.

[0086] Here, after correcting the deviation angle to the wind, when the additional energy obtained (for example, the first power) is lower than the power loss of the unit itself during the yaw process (for example, the second power), the lubrication system of the wind turbine generator set can be controlled to lubricate the yaw bearing. Optionally, in this process, the yaw enable of the unit can be turned off, so that the yaw action time originally used for yaw to the wind can be used for lubrication. In other words, lubrication can be performed according to predetermined conditions in situations other than when the unit is shut down due to low wind (that is, when the unit is generating electricity normally), thereby greatly relaxing the triggering conditions of the automatic lubrication system and ensuring that the yaw bearing is lubricated in a timely manner.

[0087] In the present invention, the relationship between the additional first power obtained by correcting the wind turbine generator set's wind deviation angle and the second power lost by the wind turbine generator set during the yaw wind deviation angle is considered to control the lubrication system of the wind turbine generator set to lubricate the yaw bearing. On the one hand, this can reduce the yaw frequency of the unit in the low wind speed section and reduce the unit's own losses. On the other hand, it can expand the conditions for starting the unit's automatic lubrication system to ensure that the unit's yaw bearing (for example, the yaw bearing body and the yaw bearing outer gear ring) is fully lubricated to prevent over-lubrication or insufficient lubrication.

[0088] In addition, the yaw lubrication control method of the present invention can obtain the hardware configuration of the unit (for example, the number of yaw motors, rated power, etc.) to automatically determine the operating conditions for starting the automatic lubrication system of the unit. By stopping the yaw action and using the reduced yaw time to trigger the action of the lubrication system, the unit's own losses at low wind speeds can be reduced, while ensuring that the unit's yaw bearings and / or outer gear rings are fully lubricated.

[0089] Figure 5 A method for controlling a lubrication system of a wind turbine generator set to lubricate a yaw bearing of a wind turbine generator set according to an embodiment of the present invention is shown.

[0090] Reference Figure 5 In step S510, in response to the current wind speed in the operating data being lower than or equal to the predetermined wind speed, the wind turbine generator set is controlled to shut down, and the wind turbine generator set is controlled to yaw in a predetermined direction at a predetermined angle.

[0091] In other words, according to the yaw lubrication control method of the present invention, when the accumulated yaw time is greater than or equal to the predetermined yaw time and the current wind speed in the operating data is lower than or equal to the predetermined wind speed, the wind turbine generator set can be controlled to shut down and the wind turbine generator set can be controlled to yaw at a predetermined angle in a predetermined direction.

[0092] In one example, the wind turbine generator set may be controlled to yaw in one direction for one circle (ie, 360 degrees). However, the above example is only exemplary, and the present invention does not limit the direction and angle of controlling the yaw of the wind turbine generator set.

[0093] In step S520, the yaw bearing is lubricated while the wind turbine generator set is controlled to yaw in a predetermined direction at a predetermined angle.

[0094] Since the yaw bearing can be lubricated during the period when the wind turbine generator set is controlled to yaw in a predetermined direction at a predetermined angle, the yaw bearing can be properly lubricated.

[0095] In addition, optionally, in response to the current wind speed in the operation data being higher than a predetermined wind speed, the lubrication system is not controlled to lubricate the yaw bearing. In other words, when the current wind speed is relatively high, lubrication may not be triggered temporarily.

[0096] In an optional embodiment, in response to the average wind speed in the predetermined time in the operating data being lower than a predetermined wind speed threshold, the lubrication system of the wind turbine generator set may be controlled to lubricate the yaw bearing of the wind turbine generator set. Figure 5 Compared with the embodiment of the present invention, this optional embodiment further expands the conditions for lubrication triggering, makes the triggering conditions more intelligent, and can adapt to all different models. In this optional embodiment, the method for lubricating the yaw bearing of the wind turbine generator set can be the same as that of the reference Figure 5The method for lubricating the yaw bearing of a wind turbine generator set described in the embodiments is the same as or similar to that described in the embodiments.

[0097] Figure 6 An alarm prediction method of a yaw lubrication control method according to an exemplary embodiment of the present invention is shown.

[0098] Reference Figure 6 , the yaw lubrication control method according to an exemplary embodiment of the present invention may further include step S610 and step S620.

[0099] In step S610, the remaining amount of grease in the grease container of the lubrication system is determined.

[0100] In the present invention, considering that the remaining amount of grease in the grease container of the lubrication system will affect the lubrication of the lubricated components (eg, yaw bearing) by the lubrication system, it is necessary to determine the remaining amount of grease in the grease container of the lubrication system.

[0101] Will be combined later Figure 7 A method for determining the remaining amount of grease in a grease container of a lubrication system is described in detail.

[0102] In step S620 , in response to the remaining amount being less than or equal to a predetermined warning threshold, the control issues an alarm signal indicating that the grease container is running low on grease.

[0103] In one example, the predetermined warning threshold may be 20% of the total capacity of the grease container. However, the above examples are only exemplary, and the present invention is not limited to a specific value or range of the predetermined warning threshold.

[0104] Since an alarm signal can be automatically issued when the grease in the grease container of the lubrication system is insufficient, the stable and safe operation of the lubrication system can be ensured.

[0105] Optionally, an alarm signal may be sent to a controller for controlling the addition of grease to the grease container, so that the controller for controlling the addition of grease to the grease container may control a grease adding device for adding grease to the grease container to add grease to the grease container in response to the alarm signal. In one embodiment, the amount of grease added to the grease container may be less than or equal to the difference between the total capacity and the remaining amount of the grease container. In the present invention, since appropriate grease can be automatically added when the grease in the grease container of the lubrication system is insufficient, the stable and safe operation of the lubrication system can be further ensured. For another example, an alarm signal may be sent to a manager of a wind turbine generator set, and the manager may control or manage the grease in the grease container.

[0106] Figure 7A flow chart of determining a remaining amount of grease in a grease container of a lubrication system according to an exemplary embodiment of the present invention is shown.

[0107] Reference Figure 7 In step S710, the greasing time of the lubrication system of the wind turbine generator set is accumulated.

[0108] Here, the accumulated greasing time may indicate the accumulated working time length of the lubrication system of the wind turbine generator set. The starting greasing time for accumulating the greasing time of the lubrication system may be predefined, and the present invention does not impose any restrictions on the starting greasing time of the accumulated greasing time. In a non-limiting example, the starting greasing time may be the time when the grease container of the lubrication system is filled with grease.

[0109] In the present invention, the lubrication time of the wind turbine generator set can be determined by various existing methods or technologies. For example, the lubrication time of the wind turbine generator set can be determined by setting a timer for timing the lubrication time of the wind turbine generator set. For another example, the lubrication time of the wind turbine generator set can be determined by monitoring or accumulating the working time of the lubrication system. However, the above examples are only exemplary, and the present invention does not limit the method for determining the lubrication time of the wind turbine generator set.

[0110] In step S720, the fat adding rate during normal fat adding is obtained.

[0111] Here, the greasing rate of the lubrication system during normal greasing can be obtained by querying the working parameters of the lubrication system.

[0112] In step S730, the difference between the total capacity of the grease container of the lubrication system and the product of the grease filling time and the grease filling rate is determined as the remaining amount of grease in the grease container.

[0113] For example, the remaining amount of grease in the grease container can be determined by the following equation (3):

[0114] V=V e -s*t Equation (3)

[0115] In equation (3), V represents the remaining amount of grease in the grease container, V e It can represent the total capacity of the grease container of the lubrication system, t can represent the accumulated greasing time of the lubrication system of the wind turbine generator set, and s is the greasing rate during normal greasing. Here, when the wind turbine generator set is operated and maintained, the total capacity of the grease container of the lubrication system can be filled up.

[0116] In the present invention, the amount of remaining grease in the grease container is estimated by only collecting relevant operating parameters of the lubrication system (ie, grease adding time, grease adding rate), thereby eliminating the need to use additional sensors and avoiding additional cost investment.

[0117] In an optional embodiment, in response to the completion of adding grease to the grease container, the greasing time is reset to 0. More specifically, when the grease container of the lubrication system is filled with grease, the greasing time may be initialized to 0.

[0118] Figure 8 A yaw lubrication control device of a wind turbine generator system according to an exemplary embodiment of the present invention is shown.

[0119] Reference Figure 8 The yaw lubrication control device 800 may include a cumulative yaw duration statistics module 810, a duration comparison module 820, and a lubrication control module 830. The yaw lubrication control device 800 may be configured to perform a reference Figures 1 to 7 Any of the methods described.

[0120] The cumulative yaw duration statistics module 810 may be configured to count the cumulative yaw duration of the wind turbine generator set. The duration comparison module 820 may be configured to compare the cumulative yaw duration with the predetermined yaw duration. The lubrication control module 830 may be configured to: when the cumulative yaw duration is greater than or equal to the predetermined yaw duration, use the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set.

[0121] More specifically, the lubrication control module 830 may be configured to perform a reference Figure 1 Step 130 described, refer to Figures 2 to 7 At least one of any of the control methods described above. Figures 1 to 7 The method of controlling the lubrication system of a wind turbine generator system to lubricate according to an exemplary embodiment of the present invention has been described in detail. Therefore, for the sake of brevity and unnecessary redundant description, the detailed description of the method executed by the lubrication control module 830 will be omitted.

[0122] Fig. 9 A block diagram of a controller of a wind turbine generator system according to an exemplary embodiment of the present invention is shown.

[0123] Reference Fig. 9 The controller 900 of the wind turbine generator set according to the exemplary embodiment of the present invention may include a processor 910 and a memory 920. Here, the memory 920 stores a computer program, wherein the computer program is executed by the processor 910 to implement the reference Figures 1 to 7 For the sake of simplicity, the reference method executed by the processor 910 will not be repeated here. Figures 1 to 7An arbitrary yaw lubrication control method is described.

[0124] In addition, the method according to the exemplary embodiment of the present invention can be implemented as a computer program in a computer-readable recording medium. Those skilled in the art can implement the computer program according to the description of the above method. When the computer program is executed in a computer, any yaw lubrication control method of the present invention is implemented. In addition, the statistical data and / or other data used in the method according to the exemplary embodiment of the present invention can be stored in the power-off retention area of ​​the PLC, thereby ensuring that the data will not be lost after the unit loses power to the power grid.

[0125] According to an exemplary embodiment of the present invention, a computer-readable storage medium may be provided, on which a computer program is stored, and when the computer program is executed by one or more computing devices (e.g., a controller, etc.), the one or more computing devices implement any of the methods disclosed in the present application. For example, when the computer program is executed by one or more computing devices, the one or more computing devices perform the following steps: determining the cumulative yaw duration of the wind turbine generator set; comparing the cumulative yaw duration with the predetermined yaw duration; in response to the cumulative yaw duration being greater than or equal to the predetermined yaw duration, controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set.

[0126] In addition, it should be understood that each unit in the device according to the exemplary embodiment of the present invention can be implemented as a hardware component and / or a software component. Those skilled in the art can, for example, use a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) to implement each unit according to the processing performed by each defined unit.

[0127] The yaw lubrication control method of the present invention can control the lubrication system of the wind turbine to lubricate the yaw bearing of the wind turbine based on the accumulated yaw time of the wind turbine, thereby ensuring that the yaw bearing is lubricated appropriately or in time to prevent over-lubrication or under-lubrication.

[0128] In addition, the yaw lubrication control method of the present invention can lubricate the yaw bearing of the wind turbine generator set and untwist the wind turbine generator set at the same time, thereby reducing the twisting degree of the power cable and ensuring the safe and stable operation of the unit.

[0129] In addition, the yaw lubrication control method of the present invention can be executed cyclically, thereby ensuring smooth lubrication for a long time.

[0130] In addition, the yaw lubrication control method of the present invention can control lubrication based on the operation data of the wind turbine generator set when the accumulated yaw time of the wind turbine generator set is satisfied. Therefore, lubrication can be controlled more accurately to prevent over-lubrication or under-lubrication.

[0131] In addition, the yaw lubrication control method of the present invention can perform lubrication according to predetermined conditions under conditions other than when the unit is shut down due to low wind (i.e., when the unit is generating electricity normally), thereby greatly relaxing the triggering conditions of the automatic lubrication system and ensuring that the yaw bearing is lubricated in a timely manner.

[0132] In addition, the yaw lubrication control method of the present invention can consider the relationship between the additional first power obtained by correcting the wind turbine's deviation angle to the wind and the second power lost by the wind turbine during the yaw deviation angle to control the lubrication system of the wind turbine to lubricate the yaw bearing. On the one hand, this can reduce the yaw frequency of the unit in the low wind speed section and reduce the unit's own losses. On the other hand, it can expand the conditions for starting the unit's automatic lubrication system to ensure that the unit's yaw bearing (for example, the yaw bearing body and the yaw bearing outer gear ring) is fully lubricated to prevent over-lubrication or insufficient lubrication.

[0133] In addition, the yaw lubrication control method of the present invention can obtain the hardware configuration of the unit (for example, the number of yaw motors, rated power, etc.) to automatically determine the operating conditions for starting the automatic lubrication system of the unit. By stopping the yaw action and using the reduced yaw time to trigger the action of the lubrication system, the unit's own losses at low wind speeds can be reduced, while ensuring that the unit's yaw bearings and / or outer gear rings are fully lubricated.

[0134] In addition, the yaw lubrication control method of the present invention can automatically send out an alarm signal when the grease in the grease container of the lubrication system is insufficient, thereby ensuring the stable and safe operation of the lubrication system.

[0135] In addition, the yaw lubrication control method of the present invention can estimate the amount of remaining grease in the grease container only by collecting relevant operating parameters of the lubrication system (ie, grease adding time, grease adding rate), thereby eliminating the need for additional sensors and avoiding additional cost investment.

[0136] Although the present disclosure includes specific examples, it will be clear to those of ordinary skill in the art that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein should be considered to be descriptive only and not for limiting purposes. The description of features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are combined in different ways, and / or replaced or supplemented by other components or their equivalents, suitable results can be achieved. Therefore, the scope of the disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents should be interpreted as included in the disclosure.

Claims

1. A yaw lubrication control method for a wind turbine generator set, characterized in that: The yaw lubrication control method comprises: Determine the accumulated yaw time of the wind turbine; Comparing the accumulated yaw duration with a predetermined yaw duration, wherein the predetermined yaw duration is a parameter preset to trigger a lubrication system of the wind turbine generator set; In response to the accumulated yaw duration being greater than or equal to the predetermined yaw duration, a lubrication system of the wind turbine generator set is controlled to lubricate the yaw bearing of the wind turbine generator set.

2. The yaw lubrication control method according to claim 1, characterized in that: In response to the accumulated yaw duration being greater than or equal to a predetermined yaw duration, the step of controlling a lubrication system of the wind turbine generator set to lubricate a yaw bearing of the wind turbine generator set comprises: In response to the accumulated yaw duration being greater than or equal to a predetermined yaw duration, acquiring operation data of the wind turbine generator set; Based on the operation data of the wind turbine generator set, the lubrication system of the wind turbine generator set is controlled to lubricate the yaw bearing of the wind turbine generator set.

3. The yaw lubrication control method according to claim 2, characterized in that: The steps of controlling the lubrication system of the wind turbine to lubricate the yaw bearing include: Calculating an additional first power obtained by correcting a wind deviation angle of the wind generator set based on first operating data of the wind generator set, wherein the first operating data includes a current wind speed, a design output power of the wind generator set corresponding to the current wind speed, and the wind deviation angle; Calculating a second power lost by the wind turbine generator set during yaw at the wind deviation angle based on second operating data of the wind turbine generator set, wherein the second operating data includes the number of yaw motors of the wind turbine generator set, the rated power of the yaw motors, the power factor of the yaw motors, and the loss margin of the yaw motors; In response to the first power being less than the second power, a lubrication system of the wind turbine generator set is controlled to lubricate the yaw bearing.

4. The yaw lubrication control method according to claim 2, characterized in that: Based on the operation data of the wind turbine generator set, the steps of controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set include: In response to the current wind speed in the operation data being lower than or equal to a predetermined wind speed, the wind turbine generator set is controlled to shut down, and the wind turbine generator set is controlled to yaw in a predetermined direction by a predetermined angle; The yaw bearing is lubricated during the process of controlling the wind turbine generator set to yaw at a predetermined angle in a predetermined direction.

5. The yaw lubrication control method according to claim 2, characterized in that: Based on the operation data of the wind turbine generator set, the steps of controlling the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set include: In response to an average value of wind speed within a predetermined time in the operation data being lower than a predetermined wind speed threshold, a lubrication system of the wind turbine generator set is controlled to lubricate a yaw bearing of the wind turbine generator set.

6. The yaw lubrication control method according to any one of claims 1 to 5, characterized in that: The yaw lubrication control method further comprises: Determine the remaining amount of grease in the grease container of the lubrication system; In response to the remaining amount being less than or equal to a predetermined warning threshold, control issues an alarm signal indicating that the grease container is low on grease.

7. The yaw lubrication control method according to claim 6, characterized in that: The steps for determining the remaining amount of grease in the grease container of the lubrication system include: Accumulated greasing time of the lubrication system of the wind turbine generator set; Get the fat adding rate during normal fat adding; The difference between the total capacity of the grease container of the lubrication system and the product of the grease filling time and the grease filling rate is determined as the remaining amount of grease in the grease container.

8. The yaw lubrication control method according to claim 7, characterized in that: The yaw lubrication control method further includes: in response to completion of adding grease to the grease container, resetting the grease adding time to 0.

9. The yaw lubrication control method according to any one of claims 1 to 5, characterized in that: The yaw lubrication control method further comprises: In response to lubricating the yaw bearing of the wind turbine generator set for a lubrication cycle, the accumulated yaw duration of the wind turbine generator set is cleared to zero, and the process returns to the step of determining the accumulated yaw duration of the wind turbine generator set.

10. The yaw lubrication control method according to any one of claims 1 to 5, characterized in that: While lubricating the yaw bearing of the wind generator set, the method further comprises: unbending the wind generator set.

11. A yaw lubrication control device for a wind turbine generator set, characterized in that: The yaw lubrication control device comprises: A cumulative yaw duration statistics module is configured to count the cumulative yaw duration of the wind turbine generator set; A duration comparison module is configured to compare the accumulated yaw duration with a predetermined yaw duration, wherein the predetermined yaw duration is a parameter preset to trigger a lubrication system of the wind turbine generator set; The lubrication control module is configured to: when the accumulated yaw duration is greater than or equal to the predetermined yaw duration, use the lubrication system of the wind turbine generator set to lubricate the yaw bearing of the wind turbine generator set. 12 . A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the yaw lubrication control method according to claim 1 is implemented.

13. A controller for a wind turbine generator set, the controller comprising: processor; Memory, The memory stores a computer program, and when the computer program is executed by the processor, the yaw lubrication control method according to any one of claims 1 to 10 is implemented.

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