Gear box fan control method, device and wind turbine generator set

Abstract

The present invention provides a control method, device and wind turbine for a gearbox fan, belonging to the field of automatic control technology, the method comprising: obtaining the ambient temperature of the area where the target wind turbine is located within a preset time period; determining the control mode for controlling the gearbox fan of the target wind turbine in combination with the system date and the ambient temperature within the preset time period; operating the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment. The control method, device and wind turbine for a gearbox fan provided by the present invention fully consider the seasonal differences in various regions to formulate and execute different control modes for the gearbox fan, realize late start of the fan in winter to avoid condensation blockage of the radiator, and early start of the fan in summer to dissipate heat in advance to avoid overheating of the radiator, which can effectively improve the adaptability of the wind turbine to different climate environments.

Description

Technical Field

[0001] The present invention relates to the field of automation control technology, and in particular to a control method and device for a gear box fan and a wind turbine generator set. Background Art

[0002] In recent years, with the vigorous development of the new energy market, the capacity of doubly-fed units has continued to increase, and the capacity of gearboxes has also increased accordingly. Therefore, the requirements for oil temperature control, fan control, and water cooling control of gearboxes have become increasingly higher.

[0003] At present, the common gearbox cooling system generally dissipates heat by configuring high-speed and low-speed fans in conjunction with radiators. Its control logic mainly controls the start and stop of high-speed and low-speed fans based on pre-set threshold conditions such as oil pool temperature and bearing temperature, thereby achieving oil temperature control for the gearbox.

[0004] Existing gearbox cooling systems are prone to problems such as radiator condensation blockage, insufficient heat dissipation performance, and excessive oil temperature, which can lead to gearbox operating failures. Summary of the invention

[0005] The present invention provides a control method and device for a gear box fan and a wind turbine generator set, which overcome the defects in the prior art of not considering the ambient temperature disturbance caused by seasonal factors, thereby causing problems such as untimely or excessive heat dissipation of the heat dissipation system, and improve the adaptability of the heat dissipation system to complex working environments.

[0006] In a first aspect, the present invention provides a method for controlling a gearbox fan, comprising: obtaining the ambient temperature of an area where a target wind turbine is located within a preset time period; determining a control mode for controlling the gearbox fan of the target wind turbine in combination with a system date and the ambient temperature within the preset time period; and running the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0007] According to a control method for a gearbox fan provided by the present invention, the control modes include a first control mode, a second control mode and a conventional control mode; the control mode for controlling the gearbox fan of the target wind turbine set is determined by combining the system date and the ambient temperature within the preset time period, specifically including: if it is determined that the system date belongs to a first date interval, and the ambient temperature within the first preset time period is lower than a first temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the first control mode; if it is determined that the system date does not belong to a date interval other than the first date interval, and the ambient temperature within the second preset time period is higher than a second temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the second control mode; otherwise, the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the conventional control mode; the first temperature threshold is less than the second temperature threshold.

[0008] According to a control method for a gear box fan provided by the present invention, after determining that the control mode for controlling the gear box fan of the target wind turbine group is the first control mode, if the ambient temperature within a third preset time period is greater than a third temperature threshold, then the control mode for controlling the gear box fan of the target wind turbine group is determined to be the conventional control mode; and the third temperature threshold is greater than the first temperature threshold.

[0009] According to a control method for a gearbox fan provided by the present invention, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: if it is determined that the gearbox oil pool temperature is greater than or equal to a fourth temperature threshold but less than a fifth temperature threshold, the gearbox fan is controlled to start running at a low speed; if it is determined that the gearbox oil pool temperature is less than a sixth temperature threshold, the gearbox fan is controlled to stop running at a low speed, the sixth temperature threshold is less than the fourth temperature threshold, and the fourth temperature threshold is less than the fifth temperature threshold; if it is determined that the gearbox oil pool temperature is greater than or equal to the fifth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventh temperature threshold, the gearbox fan is controlled to start running at a high speed; if it is determined that the gearbox oil pool temperature is less than or equal to an eighth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventh temperature threshold, the gearbox fan is controlled to stop running at a high speed, and the eighth temperature threshold is less than the fifth temperature threshold but greater than the fourth temperature threshold.

[0010] According to a control method for a gearbox fan provided by the present invention, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: if it is determined that the gearbox oil pool temperature is greater than or equal to a ninth temperature threshold but less than a tenth temperature threshold, the gearbox fan is controlled to start running at a low speed; if it is determined that the gearbox oil pool temperature is less than an eleventh temperature threshold, the gearbox fan is controlled to stop running at a low speed, the eleventh temperature threshold is less than the ninth temperature threshold, and the ninth temperature threshold is less than the tenth temperature threshold; if it is determined that the gearbox oil pool temperature is less than an eleventh temperature threshold, the gearbox fan is controlled to stop running at a low speed, the eleventh temperature threshold is less than the ninth temperature threshold, and the ninth temperature threshold is less than the tenth temperature threshold; If the pool temperature is greater than or equal to the tenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the twelfth temperature threshold, the gearbox fan is controlled to start high-speed operation; if it is determined that the gearbox oil pool temperature is less than or equal to the thirteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the twelfth temperature threshold, the gearbox fan is controlled to stop high-speed operation, and the thirteenth temperature threshold is less than the tenth temperature threshold but greater than the ninth temperature threshold; the ninth temperature threshold is greater than the fourth temperature threshold, the tenth temperature threshold is less than the fifth temperature threshold, the eleventh temperature threshold is less than the sixth temperature threshold, the twelfth temperature threshold is less than the seventh temperature threshold, and the thirteenth temperature threshold is less than the eighth temperature threshold.

[0011] According to a control method for a gearbox fan provided by the present invention, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: if it is determined that the gearbox oil pool temperature is greater than or equal to the fourteenth temperature threshold but less than the fifteenth temperature threshold, the gearbox fan is controlled to start running at a low speed; if it is determined that the gearbox oil pool temperature is less than the sixteenth temperature threshold, the gearbox fan is controlled to stop running at a low speed, the sixteenth temperature threshold is less than the fourteenth temperature threshold, and the fourteenth temperature threshold is less than the fifteenth temperature threshold; if it is determined that the gearbox oil pool temperature is greater than or equal to the fifteenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than Or equal to the seventeenth temperature threshold, the gearbox fan is controlled to start high-speed operation; if it is determined that the gearbox oil pool temperature is less than or equal to the eighteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventeenth temperature threshold, the gearbox fan is controlled to stop high-speed operation, the eighteenth temperature threshold is less than the fifteenth temperature threshold but greater than the fourteenth temperature threshold; the fourteenth temperature threshold is greater than the fourth temperature threshold but less than the ninth temperature threshold, the fifteenth temperature threshold is greater than the fifth temperature threshold but less than the tenth temperature threshold, the sixteenth temperature threshold is greater than the sixth temperature threshold but less than the eleventh temperature threshold, the seventeenth temperature threshold is greater than the seventh temperature threshold but less than the twelfth temperature threshold, and the eighteenth temperature threshold is greater than the eighth temperature threshold but less than the thirteenth temperature threshold.

[0012] According to a control method for a gearbox fan provided by the present invention, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode and the downtime of the target wind turbine set exceeds a fourth preset time length, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: controlling the gearbox fan to stop running; opening the temperature control valve to allow the oil in the gearbox oil pool to flow through the heat sink of the gearbox fan until the gearbox oil pool temperature is greater than or equal to a nineteenth temperature threshold, controlling the gearbox fan to start running at a low speed, and the nineteenth temperature threshold is greater than the fourth temperature threshold; and correcting the fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the seventh temperature threshold and the eighth temperature threshold according to the operating parameters of the gearbox fan after starting running at a low speed.

[0013] According to a control method for a gearbox fan provided by the present invention, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, and when it is determined that the temperature rise rate of the gearbox oil pool temperature is greater than a preset temperature rise rate threshold, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: if it is determined that the gearbox oil pool temperature is greater than or equal to the twentieth temperature threshold, the gearbox fan is controlled to start high-speed operation, and the 20th temperature threshold is less than the tenth temperature threshold; according to the operating parameters of the gearbox fan after starting low-speed operation, the ninth temperature threshold, the tenth temperature threshold, the eleventh temperature threshold, the twelfth temperature threshold and the thirteenth temperature threshold are corrected.

[0014] In a second aspect, the present invention also provides a control device for a gearbox fan, comprising: a data acquisition unit, used to obtain the ambient temperature of the area where the target wind turbine is located within a preset time period; a mode control unit, used to determine a control mode for controlling the gearbox fan of the target wind turbine in combination with the system date and the ambient temperature within the preset time period; a fan control unit, used to run the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0015] In a third aspect, the present invention further provides a wind turbine generator set, comprising a gearbox fan and a controller for controlling the operation of the gearbox fan; the controller executes any of the above-mentioned control methods for the gearbox fan during operation.

[0016] In a fourth aspect, the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the control method of the gearbox fan as described in any one of the above are implemented.

[0017] In a fifth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-described methods for controlling a gearbox fan.

[0018] The control method, device and wind turbine set for the gear box fan provided by the present invention fully consider the seasonal differences in various regions to formulate and implement different control modes for the gear box fan, so as to realize late starting of the fan in winter to avoid condensation and blockage of the radiator, and early starting of the fan in summer to dissipate heat in advance to avoid overheating of the radiator, which can effectively improve the adaptability of the wind turbine set to different climatic environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a flow chart of a method for controlling a gear box fan provided by the present invention;

[0021] Figure 2 is a schematic diagram of a flow chart for determining a control mode of a gear box fan provided by the present invention;

[0022] Figure 3 It is a flow chart of selecting a control mode provided by the present invention;

[0023] Figure 4 It is one of the schematic diagrams of a specific embodiment of the selection control mode provided by the present invention;

[0024] Figure 5 This is the second schematic diagram of a specific embodiment of the selection control mode provided by the present invention;

[0025] Figure 6 is a flow chart of a specific embodiment of adaptive adjustment of the first control mode provided by the present invention;

[0026] Figure 7 is a flow chart of a specific embodiment of the second control mode adaptive adjustment provided by the present invention;

[0027] Figure 8 It is a schematic diagram of the distribution of the stable temperature provided by the present invention;

[0028] Fig. 9 It is a structural schematic diagram of a control device for a gear box fan provided by the present invention;

[0029] Fig.10 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that, in the description of the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements. The orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0033] Figure 1 is a flow chart of the control method of the gear box fan provided by the present invention, such as Figure 1 As shown, including but not limited to the following steps (whose execution subject may be the controller of the gear box fan):

[0034] Step 101: Obtaining the ambient temperature of the area where the target wind turbine is located within a preset time period;

[0035] Specifically, the target wind turbine can use relevant temperature measuring devices to directly measure the ambient temperature of the area where it is located within a preset time period. The preset time period can be a time period pre-set according to user needs. It can also be determined by reading network information and reading meteorological data on a meteorological website to determine the ambient temperature of the area where the target wind turbine is located within the preset time period.

[0036] As another optional embodiment, the above-mentioned ambient temperature can also be obtained by reading the monitoring data in the Supervisory Control And Data Acquisition (SCADA) system of the target wind turbine itself. Assuming that the preset duration is 2 hours, the SCADA system obtains the ambient temperature of the area where the target wind turbine is located once every 1 second, and calculates the average of the ambient temperatures obtained every 10 minutes as the average ambient temperature; the above-mentioned average ambient temperature is used to represent the ambient temperature of the area where the target wind turbine is located within the 10 minutes. In other words, a total of 12 average ambient temperatures will be collected within the preset duration of 2 hours as the temperature values ​​of multiple ambient temperatures collected within the preset duration.

[0037] It should be noted that the SCADA system technology is mature and has reliable and accurate data collection capabilities. It can implement equipment control based on the collected data and ensure the accuracy of the acquired ambient temperature data of the target wind turbine.

[0038] Step 102: Determine a control mode for controlling a gearbox fan of the target wind turbine generator set in combination with the system date and the ambient temperature within the preset time period.

[0039] The current system date is obtained to determine the current season, such as summer or winter, according to the system date (which may include information such as year, month, and day).

[0040] Furthermore, based on the season determined by the above-mentioned system date and the ambient temperature of the area where the target wind turbine is located (multiple temperature values ​​collected within the preset time period), the pre-set control mode decision logic for controlling the gearbox fan of the target wind turbine can be combined to automatically match the optimal control mode for controlling the gearbox fan in the current season and current ambient temperature, so that the fan can be turned on late in winter to avoid condensation and blockage of the radiator, and the fan can be turned on early in summer to dissipate heat in advance to avoid overheating of the radiator.

[0041] Step 103: Run the control mode to control the high and low speed start and stop of the gear box fan according to the gear box oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0042] Figure 2 is a flow chart of determining the control mode of the gear box fan provided by the present invention, such as Figure 2 As shown, including but not limited to the following steps:

[0043] Get system date and ambient temperature;

[0044] Based on the system date and ambient temperature, according to the preset control mode decision logic, it is determined whether the triggering condition of any control mode is met, and if so, the operation mode of the gearbox fan of the target wind turbine is switched to any control mode;

[0045] Control the high and low speed start and stop of the gearbox fan based on the selected control mode;

[0046] The heat dissipation performance of the gearbox cooling system is affected by controlling the high and low speed start and stop of the gearbox fan.

[0047] The high-speed shaft bearing of a wind turbine refers to the bearing of the high-speed shaft, in which the low-speed shaft of the wind turbine connects the rotor axis to the gearbox. The blades are driven by wind to drive the low-speed shaft to rotate through the gearbox to drive the high-speed shaft to rotate. The high-speed shaft runs at a preset speed to drive the generator, thereby converting wind power into electrical energy.

[0048] Among them, the high and low speed start and stop of the gear box fan include high speed start, high speed stop, low speed start and low speed stop of the gear box fan;

[0049] The control mode may include controlling the gear box fan to start with a delay when the ambient temperature is low in winter, or controlling the gear box fan to start in advance when the ambient temperature is high in summer.

[0050] The heat dissipation performance of the gearbox cooling system is adjusted by controlling the high and low speed start and stop of the gearbox fan. For example, the high-speed start of the gearbox fan is controlled to enhance the heat dissipation performance of the cooling system, and the stop of the gearbox fan is controlled to weaken the heat dissipation performance of the cooling system.

[0051] For example, when the system date is December in winter, and the temperature values ​​of multiple ambient temperatures collected within the preset time are all lower than 5°C, it is determined that the optimal control mode for controlling the gearbox fan in the current season and current ambient temperature is a control mode suitable for the winter working environment (hereinafter referred to as the first control mode). This control mode includes: delaying the start of the gearbox fan to weaken the heat dissipation performance of the heat dissipation system and avoiding condensation and blockage of the radiator.

[0052] The control method for the gear box fan provided by the present invention fully considers the seasonal differences in various regions to formulate and execute different control modes for the gear box fan, so as to realize starting the fan late in winter to avoid condensation and blockage of the radiator, and starting the fan early in summer to dissipate heat in advance to avoid overheating of the radiator, which can effectively improve the adaptability of the wind turbine set to different climatic environments.

[0053] Based on the content of the above embodiment, as an optional embodiment, the control mode includes a first control mode, a second control mode and a normal control mode;

[0054] The step of determining a control mode for controlling the gearbox fan of the target wind turbine generator set by combining the system date and the ambient temperature within the preset time period specifically includes:

[0055] If it is determined that the system date belongs to the first date interval, and the ambient temperature within the first preset time period is lower than the first temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the first control mode;

[0056] If it is determined that the system date does not belong to the first date interval, and the ambient temperature within the second preset time period is higher than the second temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the second control mode;

[0057] Otherwise, determining that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode;

[0058] The first temperature threshold is lower than the second temperature threshold.

[0059] Figure 3 is a flow chart of the selection control mode provided by the present invention, such as Figure 3 As shown, including but not limited to the following steps:

[0060] When the controller is based on the system date and the ambient temperature of the area where the target wind turbine is located, it automatically matches the optimal control mode suitable for controlling the gearbox fan in the current season and the current ambient temperature. Optionally, the control modes include the first control mode, the second control mode and the conventional control mode, etc. Different control modes have corresponding trigger conditions, and the specific trigger conditions can be determined by the control mode decision logic set according to user needs. The high and low speed start and stop of the gearbox fan are controlled based on the selected control mode.

[0061] As an optional embodiment, assume that the first date interval is from October to February of the following year (i.e., the months included in winter), the first preset time is 5 hours, the first temperature threshold is 0° C., the second preset time is 24 hours, and the second temperature threshold is 10° C. It should be noted that the first temperature threshold is smaller than the second temperature threshold.

[0062] Figure 4 is one of the schematic diagrams of a specific embodiment of the selection control mode provided by the present invention, such as Figure 4 As shown, including but not limited to the following steps:

[0063] After obtaining the ambient temperature, first determine whether the current system date is any day from October to February of the following year (that is, determine whether the current time is winter);

[0064] If it is determined that the current time is winter, determine whether the temperature values ​​of multiple ambient temperatures collected within a preset time of 5 hours are all lower than 0°C;

[0065] If yes, setting the control mode of the gearbox fan to the first control mode;

[0066] If at least one of the multiple ambient temperature values ​​collected within the preset time of 5 hours is not lower than 0°C, the control mode of the gearbox fan is set to the normal control mode;

[0067] If the current system date is not any day between October and February of the following year, determine whether the temperature values ​​of multiple ambient temperatures collected within a preset time period of 24 hours are always higher than 10°C;

[0068] If yes, the control mode of the gearbox fan is set to the second control mode;

[0069] If at least one of the temperature values ​​of the multiple ambient temperatures collected within the preset time period of 24 hours is not higher than 10° C., the control mode of the gear box fan is set to the normal control mode.

[0070] The control method of the gear box fan provided by the present invention automatically adjusts the gear box fan according to the current season and ambient temperature by setting different control modes so that the gear box fan is in a good heat dissipation state, thereby effectively improving the ability of the gear box fan to adapt to complex working environments.

[0071] Based on the content of the above embodiment, as an optional embodiment, after determining that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, if the ambient temperature within a third preset time period is greater than a third temperature threshold, then determining that the control mode for controlling the gearbox fan of the target wind turbine set is the normal control mode;

[0072] The third temperature threshold is greater than the first temperature threshold.

[0073] As an optional embodiment, it is assumed that the third preset time period is 10 hours and the third temperature threshold is 5°C.

[0074] Figure 5 2 is a schematic diagram of a specific embodiment of the selection control mode provided by the present invention. Figure 5 As shown, including but not limited to the following steps:

[0075] When it is determined that the current control mode of the gear box fan is the first control mode, continue to obtain the ambient temperature;

[0076] Determine whether the temperature values ​​of multiple ambient temperatures collected within a preset time of 10 hours are all higher than 5°C;

[0077] If yes, set the control mode of the gearbox fan to the normal control mode;

[0078] If at least one of the temperature values ​​of the multiple ambient temperatures collected within the preset time period of 10 hours is not higher than 5° C., the control mode of the gear box fan is maintained at the first control mode.

[0079] The control method of the gear box fan provided by the present invention, when the control mode of the gear box fan is the first control mode, determines whether the control mode of the gear box fan needs to be adjusted to the normal control mode according to the current ambient temperature. When the control mode of the gear box fan does not need to be adjusted, it is maintained in the first control mode, which can more sensitively capture the ambient temperature changes and make the gear box fan work in a good heat dissipation environment as much as possible.

[0080] Based on the content of the above embodiment, as an optional embodiment, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes:

[0081] If it is determined that the gearbox oil pool temperature is greater than or equal to the fourth temperature threshold but less than the fifth temperature threshold, controlling the gearbox fan to start running at a low speed;

[0082] If it is determined that the gearbox oil pool temperature is less than a sixth temperature threshold, controlling the gearbox fan to stop running at a low speed, the sixth temperature threshold is less than the fourth temperature threshold, and the fourth temperature threshold is less than the fifth temperature threshold;

[0083] If it is determined that the gearbox oil pool temperature is greater than or equal to the fifth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventh temperature threshold, then controlling the gearbox fan to start high-speed operation;

[0084] If it is determined that the gearbox oil pool temperature is less than or equal to the eighth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventh temperature threshold, the gearbox fan is controlled to stop high-speed operation, and the eighth temperature threshold is less than the fifth temperature threshold but greater than the fourth temperature threshold.

[0085] Specifically, Table 1 is a high and low speed start and stop control logic table of the gearbox fan in the first control mode. As shown in Table 1, when the gearbox fan control mode is the first control mode, the gearbox oil pool temperature and the high-speed shaft bearing temperature are used to control the high and low speed start and stop actions of the gearbox fan.

[0086] When the gear box oil pool temperature is greater than or equal to the fourth temperature threshold and less than the fifth temperature threshold, the gear box fan starts to run at a low speed.

[0087] When the gearbox oil pool temperature is less than the sixth temperature threshold, the gearbox fan stops running at a low speed, wherein the sixth temperature threshold is less than the fourth temperature threshold, so as to ensure that the gearbox fan stops running at a low speed correctly.

[0088] When the gearbox oil pool temperature is greater than or equal to the fifth temperature threshold or any high-speed shaft bearing temperature is greater than or equal to the seventh temperature threshold, the gearbox fan starts to run at high speed.

[0089] When the gearbox oil pool temperature is less than or equal to the eighth temperature threshold and at least two high-speed shaft bearing temperatures are less than the seventh temperature threshold, the gearbox fan stops running at high speed. The eighth temperature threshold is less than the fifth temperature threshold but greater than the fourth temperature threshold to ensure that the gearbox fan will start running at low speed after stopping running at high speed, avoiding the situation where the fan stops running directly and causes insufficient heat dissipation.

[0090] Table 1 Gearbox fan high and low speed start and stop control logic table for the first control mode

[0091]

[0092] As an optional embodiment, assume that the sixth temperature threshold is 45°C, the fourth temperature threshold is 47°C, the eighth temperature threshold is 55°C, the fifth temperature threshold is 65°C and the seventh temperature threshold is 80°C.

[0093] When the gearbox oil pool temperature is 50°C, the gearbox fan runs at low speed;

[0094] When the gearbox oil pool temperature is 44°C, the gearbox fan stops running at low speed;

[0095] When the gearbox oil pool temperature is 66°C or the temperature of any high-speed shaft bearing reaches 80°C, the gearbox fan is running at high speed;

[0096] When the gearbox oil pool temperature is 54°C and at least two high-speed shaft bearing temperatures are below 80°C, the gearbox fan stops running at high speed and starts running at low speed.

[0097] The control method of the gear box fan provided by the present invention determines the high and low speed start and stop actions of the gear box fan based on the gear box oil pool temperature and the high-speed shaft bearing temperature. According to the control logic table that is more in line with the actual situation in winter weather, the heat dissipation capacity of the gear box fan at different operating temperatures can be better and more accurately controlled, thereby improving the adaptability of the gear box fan to complex environments.

[0098] Based on the content of the above embodiment, as an optional embodiment, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes:

[0099] If it is determined that the gearbox oil pool temperature is greater than or equal to the ninth temperature threshold but less than the tenth temperature threshold, controlling the gearbox fan to start running at a low speed;

[0100] If it is determined that the gearbox oil pool temperature is less than an eleventh temperature threshold, controlling the gearbox fan to stop running at a low speed, the eleventh temperature threshold is less than the ninth temperature threshold, and the ninth temperature threshold is less than the tenth temperature threshold;

[0101] If it is determined that the gearbox oil pool temperature is greater than or equal to the tenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the twelfth temperature threshold, then controlling the gearbox fan to start high-speed operation;

[0102] If it is determined that the gearbox oil pool temperature is less than or equal to the thirteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the twelfth temperature threshold, then controlling the gearbox fan to stop running at high speed, and the thirteenth temperature threshold is less than the tenth temperature threshold but greater than the ninth temperature threshold;

[0103] The ninth temperature threshold is greater than the fourth temperature threshold, the tenth temperature threshold is less than the fifth temperature threshold, the eleventh temperature threshold is less than the sixth temperature threshold, the twelfth temperature threshold is less than the seventh temperature threshold, and the thirteenth temperature threshold is less than the eighth temperature threshold.

[0104] Specifically, Table 2 is a high and low speed start and stop control logic table of the gearbox fan in the second control mode. As shown in Table 2, when the gearbox fan control mode is the second control mode, the gearbox oil pool temperature and the high-speed shaft bearing temperature are used to control the high and low speed start and stop actions of the gearbox fan.

[0105] When the gear box oil pool temperature is greater than or equal to the ninth temperature threshold and less than the tenth temperature threshold, the gear box fan starts to run at a low speed.

[0106] When the gearbox oil pool temperature is less than the eleventh temperature threshold, the gearbox fan stops running at a low speed. The eleventh temperature threshold is less than the ninth temperature threshold to ensure that the gearbox fan stops running at a low speed correctly.

[0107] When the gearbox oil pool temperature is greater than or equal to the tenth temperature threshold or any high-speed shaft bearing temperature is greater than or equal to the twelfth temperature threshold, the gearbox fan starts to run at high speed.

[0108] When the gearbox oil pool temperature is less than or equal to the thirteenth temperature threshold and at least two high-speed shaft bearing temperatures are less than the twelfth temperature threshold, the gearbox fan stops running at high speed. The thirteenth temperature threshold is less than the tenth temperature threshold but greater than the ninth temperature threshold, to ensure that after the gearbox fan stops running at high speed, it will start running at low speed to avoid the situation where the fan stops running directly and causes insufficient heat dissipation.

[0109] Table 2 Second control mode gearbox fan high and low speed start and stop control logic table

[0110]

[0111] As an optional embodiment, assume that the eleventh temperature threshold is 45°C, the ninth temperature threshold is 47°C, the thirteenth temperature threshold is 50°C, the tenth temperature threshold is 55°C and the twelfth temperature threshold is 70°C.

[0112] When the gearbox oil pool temperature is 46°C, the gearbox fan is running at low speed;

[0113] When the gearbox oil pool temperature is 44°C, the gearbox fan stops speeding up;

[0114] When the gearbox oil pool temperature is 55°C or the temperature of any high-speed shaft bearing reaches 70°C, the gearbox fan is running at high speed;

[0115] When the gearbox oil pool temperature is 50°C and at least two high-speed shaft bearing temperatures are below 70°C, the gearbox fan stops running at high speed and starts running at low speed.

[0116] The control method of the gear box fan provided by the present invention determines the high and low speed start and stop actions of the gear box fan based on the gear box oil pool temperature and the high-speed shaft bearing temperature. According to the control logic table that is more in line with the actual situation in summer weather, the heat dissipation capacity of the gear box fan at different operating temperatures can be better and more accurately controlled, thereby improving the adaptability of the gear box fan to complex environments.

[0117] Based on the content of the above embodiment, as an optional embodiment, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes:

[0118] If it is determined that the gearbox oil pool temperature is greater than or equal to the fourteenth temperature threshold but less than the fifteenth temperature threshold, controlling the gearbox fan to start running at a low speed;

[0119] If it is determined that the gearbox oil pool temperature is less than a sixteenth temperature threshold, controlling the gearbox fan to stop running at a low speed, the sixteenth temperature threshold is less than the fourteenth temperature threshold, and the fourteenth temperature threshold is less than the fifteenth temperature threshold;

[0120] If it is determined that the gearbox oil pool temperature is greater than or equal to the fifteenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventeenth temperature threshold, then controlling the gearbox fan to start high-speed operation;

[0121] If it is determined that the gearbox oil pool temperature is less than or equal to the eighteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventeenth temperature threshold, then controlling the gearbox fan to stop high-speed operation, and the eighteenth temperature threshold is less than the fifteenth temperature threshold but greater than the fourteenth temperature threshold;

[0122] The fourteenth temperature threshold is greater than the fourth temperature threshold but less than the ninth temperature threshold, the fifteenth temperature threshold is greater than the fifth temperature threshold but less than the tenth temperature threshold, the sixteenth temperature threshold is greater than the sixth temperature threshold but less than the eleventh temperature threshold, the seventeenth temperature threshold is greater than the seventh temperature threshold but less than the twelfth temperature threshold, and the eighteenth temperature threshold is greater than the eighth temperature threshold but less than the thirteenth temperature threshold.

[0123] Specifically, Table 3 is a high and low speed start and stop control logic table of the gearbox fan in the conventional control mode. As shown in Table 3, when the gearbox fan control mode is the conventional control mode, the gearbox oil pool temperature and the high-speed shaft bearing temperature are used to control the high and low speed start and stop actions of the gearbox fan.

[0124] When the gear box oil pool temperature is greater than or equal to the fourteenth temperature threshold and less than the fifteenth temperature threshold, the gear box fan starts to run at a low speed.

[0125] When the gearbox oil pool temperature is less than the sixteenth temperature threshold, the gearbox fan stops running at a low speed, wherein the sixteenth temperature threshold is less than the fourteenth temperature threshold, so as to ensure that the gearbox fan stops running at a low speed correctly.

[0126] When the gearbox oil pool temperature is greater than or equal to the fifteenth temperature threshold or the temperature of any high-speed shaft bearing is greater than or equal to the seventeenth temperature threshold, the gearbox fan starts to run at high speed.

[0127] When the gearbox oil pool temperature is less than or equal to the 18th temperature threshold and at least two high-speed shaft bearing temperatures are less than the 17th temperature threshold, the gearbox fan stops running at high speed. Among them, the 18th temperature threshold is less than the 15th temperature threshold but greater than the 14th temperature threshold, so as to ensure that the gearbox fan will start running at low speed after stopping running at high speed, so as to avoid the situation where the fan stops running directly and causes insufficient heat dissipation.

[0128] Table 3 Conventional control mode gearbox fan high and low speed start and stop control logic table

[0129]

[0130] As an optional embodiment, assume that the sixteenth temperature threshold is 45°C, the fourteenth temperature threshold is 47°C, the eighteenth temperature threshold is 55°C, the fifteenth temperature threshold is 60°C and the seventeenth temperature threshold is 75°C.

[0131] When the gearbox oil pool temperature is 48°C, the gearbox fan runs at low speed;

[0132] When the gearbox oil pool temperature is 44°C, the gearbox fan stops speeding up;

[0133] When the gearbox oil pool temperature is 63°C or the temperature of any high-speed shaft bearing reaches 75°C, the gearbox fan is running at high speed;

[0134] When the gearbox oil pool temperature is 54°C and at least two high-speed shaft bearing temperatures are below 75°C, the gearbox fan stops running at high speed and starts running at low speed.

[0135] The control method of the gear box fan provided by the present invention determines the high and low speed start and stop actions of the gear box fan based on the gear box oil pool temperature and the high-speed shaft bearing temperature. According to the control logic table that is more in line with the actual situation under normal temperature weather, the heat dissipation capacity of the gear box fan at different operating temperatures can be better and more accurately controlled, thereby improving the adaptability of the gear box fan to complex environments.

[0136] Based on the content of the above embodiment, as an optional embodiment, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode and the downtime of the target wind turbine set exceeds a fourth preset time, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes:

[0137] Controlling the gear box fan to stop running;

[0138] Opening the temperature control valve so that the oil in the gearbox oil pool flows through the heat sink of the gearbox fan until the temperature of the gearbox oil pool is greater than or equal to a nineteenth temperature threshold, and controlling the gearbox fan to start running at a low speed, wherein the nineteenth temperature threshold is greater than the fourth temperature threshold;

[0139] The fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the seventh temperature threshold and the eighth temperature threshold are corrected according to the operating parameters of the gear box fan after starting to run at a low speed.

[0140] Specifically, when it is determined that the control mode of the gearbox fan is the first control mode, the working state of the gearbox fan is monitored, and when the gearbox fan stops running for more than the fourth preset time, the adaptive adjustment strategy under the first control mode is turned on. In other words, when the gearbox fan stops running for too long, it indicates that the heat dissipation performance of the current gearbox fan is excessive. The long-term shutdown of the gearbox fan is likely to cause condensation on the heat sink in the gearbox fan, thereby causing the gearbox to malfunction. Therefore, the parameters of the gearbox fan need to be corrected. Among them, the fourth preset time can be pre-set according to the practical needs of the specific scenario, and the adaptive adjustment strategy is specifically:

[0141] First, confirm that the gearbox fan stops running, and then open the temperature control valve to allow the hot oil stored in the oil pool to flow through the heat sink in the gearbox fan. The temperature control valve can be a self-acting temperature control valve or an electric temperature control valve.

[0142] When the gearbox oil pool temperature reaches the nineteenth temperature threshold, the gearbox fan starts to run at a low speed, wherein the nineteenth temperature threshold is preset according to the practical requirements of a specific scenario, and the nineteenth temperature threshold is greater than the fourth temperature threshold.

[0143] Finally, according to the operating parameters of the gearbox fan after it starts running at low speed, the gearbox fan parameters in the high and low speed start and stop control logic of the gearbox fan in the first control mode are adaptively adjusted, mainly including the fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the seventh temperature threshold and the eighth temperature threshold.

[0144] As an optional embodiment, assume that the fourth preset time length is 8 hours and the nineteenth temperature threshold is 60°C.

[0145] Figure 6 is a flowchart of a specific embodiment of the first control mode adaptive adjustment provided by the present invention, such as Figure 6 As shown, including but not limited to the following steps:

[0146] When it is determined that the current control mode of the gear box fan is the first control mode, it is determined whether the downtime of the current gear box fan (the time when the gear box fan stops running) exceeds the preset time of 8 hours;

[0147] If the downtime of the gear box fan is less than 8 hours, the control mode of the gear box fan is maintained in the first control mode;

[0148] If the gearbox fan has been shut down for more than 8 hours, confirm whether the gearbox fan is currently in a stopped state;

[0149] When the gearbox fan is confirmed to be in a stopped state, open the temperature control valve to allow the hot oil in the gearbox oil pool to flow through the heat sink in the gearbox fan, and dredge the heat sink to avoid condensation of the heat sink;

[0150] Keep using hot oil to unclog the heat sink until the gearbox oil pool temperature reaches the nineteenth temperature threshold of 60°C, and the gearbox fan starts running at a low speed;

[0151] After the gearbox fan starts running at a low speed, the gearbox fan starts to adjust adaptively;

[0152] The generator of the wind turbine starts to work at full power, that is, the generator of the wind turbine works at rated power;

[0153] The generator of the wind turbine is running at full capacity until the oil pool temperature of the gearbox is stable;

[0154] When the oil pool temperature of the gearbox is in a stable state, record the stable oil pool temperature and any bearing temperature in the stable state;

[0155] After recording the stable oil pool temperature and any bearing temperature in the stable state, determine whether the temperature value of the gearbox oil pool temperature is always greater than 65°C within 30 minutes;

[0156] If the temperature of the gearbox oil pool is greater than 65°C within 30 minutes, it indicates that the gearbox has a heat dissipation failure. Record the abnormal event and notify the maintenance personnel.

[0157] If the oil pool temperature of any gearbox is less than 65°C within 30 minutes, the gearbox fan parameters will be adaptively corrected;

[0158] Finally, the control mode of the gearbox fan is switched to the first control mode.

[0159] The control method of the gear box fan provided by the present invention, when the control mode of the gear box fan is the first control mode and the gear box fan is shut down for a long time, realizes self-adjustment of the gear box fan to adapt to the current working environment by adaptively adjusting the gear box fan parameters, thereby improving the adaptability of the gear box fan to complex working environments.

[0160] Based on the content of the above embodiment, as an optional embodiment, when it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, and it is determined that the temperature rise rate of the gearbox oil pool temperature is greater than the preset temperature rise rate threshold, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including:

[0161] If it is determined that the gearbox oil pool temperature is greater than or equal to the twentieth temperature threshold, controlling the gearbox fan to start high-speed operation, and the twentieth temperature threshold is less than the tenth temperature threshold;

[0162] The ninth temperature threshold, the tenth temperature threshold, the eleventh temperature threshold, the twelfth temperature threshold and the thirteenth temperature threshold are corrected according to the operating parameters of the gear box fan after starting to run at high speed.

[0163] Specifically, when it is determined that the control mode of the gearbox fan is the second control mode, the gearbox oil pool temperature is monitored. When the temperature rise rate of the gearbox oil pool temperature is too fast and exceeds the pre-set temperature rise rate threshold, the adaptive adjustment strategy under the second control mode is turned on. In other words, when the gearbox oil pool temperature rises too fast, it indicates that the heat dissipation performance of the current gearbox fan does not meet the heat dissipation requirements of the current gearbox fan to cope with the working environment temperature. It is easy for the gearbox oil pool temperature to be too high, resulting in gearbox failure. Therefore, the parameters of the gearbox fan need to be corrected. Among them, the temperature rise rate threshold is pre-set according to the practical needs of the specific scenario, and the adaptive adjustment strategy is specifically:

[0164] First, until the gearbox oil pool temperature reaches the twentieth temperature threshold, the gearbox fan starts to run at high speed. The twentieth temperature threshold can be pre-set according to the practical requirements of a specific scenario, and the twentieth temperature threshold is less than the tenth temperature threshold.

[0165] Finally, according to the operating parameters of the gearbox fan after it starts running at high speed, the gearbox fan parameters in the high and low speed start and stop control logic of the gearbox fan in the second control mode are adaptively adjusted, mainly including the ninth temperature threshold, the tenth temperature threshold, the eleventh temperature threshold, the twelfth temperature threshold and the thirteenth temperature threshold.

[0166] As an optional embodiment, it is assumed that the twentieth temperature threshold is 47° C. and the temperature rise rate threshold is 20° C. / 10 min. Figure 7 is a flowchart of a specific embodiment of the second control mode adaptive adjustment provided by the present invention, such as Figure 7 As shown, including but not limited to the following steps:

[0167] When it is determined that the current control mode of the gearbox fan is the second control mode, calculating the current gearbox oil pool temperature rise rate;

[0168] Determine whether the current gearbox oil pool temperature rise rate exceeds 20℃ / 10min;

[0169] If not, the control mode of the gearbox fan is maintained in the second control mode;

[0170] If the current gearbox oil pool temperature rise rate exceeds 20°C / 10min, the gearbox fan starts to run at high speed until the gearbox oil pool temperature value exceeds the twentieth temperature threshold of 47°C;

[0171] When the gearbox fan starts running at high speed, calculate the average working power of the wind turbine generator for 30 minutes;

[0172] Determine whether the average operating power of the wind turbine generator within 30 minutes is less than 0.8 times the rated power of the wind turbine generator;

[0173] If yes, it means that the wind turbine has failed, the abnormal event is recorded, and the maintenance personnel are notified;

[0174] If the average operating power of the wind turbine generator within 30 minutes is greater than 0.8 times the rated power of the wind turbine generator, the gearbox fan starts to adjust adaptively;

[0175] The generator of the wind turbine starts to work at full capacity;

[0176] The generator of the wind turbine is running at full capacity until the oil pool temperature of the gearbox is stable;

[0177] When the oil pool temperature of the gearbox is in a stable state, record the stable oil pool temperature and any bearing temperature in the stable state;

[0178] After recording the stable oil pool temperature and any bearing temperature in the stable state, determine whether the temperature value of the gearbox oil pool temperature is always greater than 65°C within 30 minutes;

[0179] If the temperature of the gearbox oil pool is greater than 65°C within 30 minutes, it indicates that the gearbox has a heat dissipation failure. Record the abnormal event and notify the maintenance personnel.

[0180] If the oil pool temperature of any gearbox is less than 65°C within 30 minutes, the gearbox fan parameters will be adaptively corrected;

[0181] Finally, the control mode of the gear box fan is switched to the second control mode.

[0182] The control method of the gear box fan provided by the present invention, when the control mode of the gear box fan is the second control mode and the temperature rise rate of the gear box oil pool is too fast, realizes self-adjustment of the gear box fan to adapt to the current working environment by adaptively adjusting the gear box fan parameters, thereby improving the adaptability of the gear box fan to complex working environments.

[0183] As an optional embodiment, the present invention further provides an automatic control system (hereinafter referred to as the system) for adaptively adjusting the temperature threshold according to the operating parameters. For the convenience of description, the gearbox fan parameters including the gearbox oil pool temperature are taken as an example for explanation, specifically:

[0184] Assume that the gearbox oil pool temperature detected at the kth moment is expressed as:

[0185] y[k]=A*y[k-1]+B*u[k-1-τ]

[0186] Among them, y is the gearbox oil pool temperature; u is the start and stop control quantity of the gearbox fan, which is used to adjust the high and low speed operation speed of the gearbox fan; A and B are constant coefficients.

[0187] Then the transfer function of the system can be expressed as:

[0188]

[0189] Among them, K is the gain; T is the inertia time constant; e is the natural constant; τ is the delay time.

[0190] When the gearbox fan is in different working environments, the parameters in the above transfer function will also be different. To obtain the dynamic model of the system, perform the following operations:

[0191] (1) At a specific stable temperature point T i , stop the fan, obtain the dynamic response characteristics of the gearbox oil pool temperature rise under this working environment, and obtain the system parameter K at this time through the system identification method i,up ,T i,up ,τ i,up ;

[0192] (2) At a specific stable temperature point T i , turn on the fan, obtain the dynamic response characteristics of the gearbox oil pool temperature drop under this working environment, and obtain the system parameter K at this time through the system identification method i,down ,T i,down ,τ i,down ;

[0193] The above method is used to obtain the dynamic model of the gearbox oil pool temperature rise and fall. If the stable temperature is T r ∈[T i ,T i+1 ],but

[0194]

[0195] Other system parameters are obtained using the same linear interpolation method.

[0196] For the system under this working environment, the dynamic model of the gearbox oil pool temperature rise is:

[0197]

[0198] The dynamic model of the gearbox oil pool temperature drop is:

[0199]

[0200] The system overshoot in the rising stage is k s,up , the overshoot in the descending stage is k s,down , then the fan start temperature is set to:

[0201] T start =T over -(k s,up +ξ)T r

[0202] The fan stop temperature at this time is set to:

[0203] T stop =T down +(k s,down +ξ)T r

[0204] Among them, T over , T down They are superheat temperature and supercooling temperature respectively, which can be calculated according to T r The actual range is pre-set; ξ is the safety margin factor.

[0205] It should be noted that other parameters of the gearbox fan can also be adaptively adjusted by the above method, which will not be elaborated here.

[0206] Figure 8 Schematic diagram of the distribution of stable temperature provided by the present invention, such as Figure 8 As shown in FIG. 1 , the ambient temperature, the heat sink condensing temperature, the fan stop temperature, the stable temperature, the fan start temperature, the overheat temperature and the upper temperature limit are arranged in descending order. That is, the stable temperature is in the range from the fan stop temperature to the fan start temperature.

[0207] Fig. 9 Schematic diagram of the structure of the control device of the gear box fan provided by the present invention. Fig. 9 As shown, it mainly includes a data acquisition unit 91, a mode control unit 92 and a fan control unit 93, wherein:

[0208] The data acquisition unit 91 is mainly used to obtain the ambient temperature of the area where the target wind turbine is located within a preset time period;

[0209] The mode control unit 92 is mainly used to determine the control mode for controlling the gearbox fan of the target wind turbine generator set in combination with the system date and the ambient temperature within the preset time period;

[0210] The fan control unit 93 is mainly used to run the control mode to control the high and low speed start and stop of the gear box fan according to the gear box oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0211] It should be noted that the control device for the gear box fan provided in the embodiment of the present invention can execute the control method for the gear box fan described in any of the above embodiments during specific operation, which will not be elaborated in this embodiment.

[0212] The control device for the gear box fan provided by the present invention fully considers the seasonal differences in various regions to formulate and execute different control modes for the gear box fan, so as to realize late starting of the fan in winter to avoid condensation and blockage of the radiator, and early starting of the fan in summer to dissipate heat in advance to avoid overheating of the radiator, which can effectively improve the adaptability of the wind turbine set to different climatic environments.

[0213] As an optional embodiment, the present invention further provides a wind turbine generator set, comprising a gearbox fan and a controller for controlling the operation of the gearbox fan; the controller executes the steps of any of the above-mentioned control methods for the gearbox fan when running.

[0214] The wind turbine generator set may be a constant speed constant frequency wind turbine generator set, a variable speed constant frequency wind turbine generator set or other wind turbine generator sets, and the present invention does not make any specific limitation on this.

[0215] The wind turbine set provided by the present invention fully considers the seasonal differences in various regions to formulate and implement different control modes for the gear box fan, so as to realize late starting of the fan in winter to avoid condensation and blockage of the radiator, and early starting of the fan in summer to dissipate heat in advance to avoid overheating of the radiator, which can effectively improve the adaptability of the wind turbine set to different climatic environments.

[0216] Fig.10 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Fig.10As shown, the electronic device may include: a processor 1010, a communication interface 1020, a memory 1030 and a communication bus 1040, wherein the processor 1010, the communication interface 1020 and the memory 1030 communicate with each other through the communication bus 1040. The processor 1010 may call the logic instructions in the memory 1030 to execute a control method for a gearbox fan, the method comprising: obtaining the ambient temperature of the area where the target wind turbine is located within a preset time period; determining a control mode for controlling the gearbox fan of the target wind turbine in combination with the system date and the ambient temperature within the preset time period; and running the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0217] In addition, the logic instructions in the above-mentioned memory 1030 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0218] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the gearbox fan control method provided in the above-mentioned embodiments, the method comprising: obtaining the ambient temperature of the area where the target wind turbine is located within a preset time period; determining a control mode for controlling the gearbox fan of the target wind turbine in combination with the system date and the ambient temperature within the preset time period; running the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment.

[0219] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0220] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0221] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling a gear box fan, characterized in that: include: Obtain the ambient temperature of the area where the target wind turbine is located within a preset time period; Determine a control mode for controlling a gearbox fan of the target wind turbine generator set in combination with the system date and the ambient temperature within the preset time period; Running the control mode to control the high and low speed start and stop of the gearbox fan according to the current gearbox oil pool temperature and high-speed shaft bearing temperature; The control modes include a first control mode, a second control mode and a normal control mode; The step of determining a control mode for controlling the gearbox fan of the target wind turbine generator set by combining the system date and the ambient temperature within the preset time period specifically includes: If it is determined that the system date belongs to the first date interval, and the ambient temperature within the first preset time period is lower than the first temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the first control mode; If it is determined that the system date does not belong to the first date interval, and the ambient temperature within the second preset time period is higher than the second temperature threshold, then determining that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode; Otherwise, determining that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode; The first temperature threshold is less than the second temperature threshold; After determining that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, if the ambient temperature within a third preset time period is greater than a third temperature threshold, determining that the control mode for controlling the gearbox fan of the target wind turbine set is the normal control mode; The third temperature threshold is greater than the first temperature threshold; When it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes: If it is determined that the gearbox oil pool temperature is greater than or equal to the fourth temperature threshold but less than the fifth temperature threshold, controlling the gearbox fan to start running at a low speed; If it is determined that the gearbox oil pool temperature is less than a sixth temperature threshold, controlling the gearbox fan to stop running at a low speed, the sixth temperature threshold is less than the fourth temperature threshold, and the fourth temperature threshold is less than the fifth temperature threshold; If it is determined that the gearbox oil pool temperature is greater than or equal to the fifth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventh temperature threshold, then controlling the gearbox fan to start high-speed operation; If it is determined that the gearbox oil pool temperature is less than or equal to the eighth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventh temperature threshold, the gearbox fan is controlled to stop high-speed operation, and the eighth temperature threshold is less than the fifth temperature threshold but greater than the fourth temperature threshold.

2. The control method of the gear box fan according to claim 1, characterized in that: When it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes: If it is determined that the gearbox oil pool temperature is greater than or equal to the ninth temperature threshold but less than the tenth temperature threshold, controlling the gearbox fan to start running at a low speed; If it is determined that the gearbox oil pool temperature is less than an eleventh temperature threshold, controlling the gearbox fan to stop running at a low speed, the eleventh temperature threshold is less than the ninth temperature threshold, and the ninth temperature threshold is less than the tenth temperature threshold; If it is determined that the gearbox oil pool temperature is greater than or equal to the tenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the twelfth temperature threshold, then controlling the gearbox fan to start high-speed operation; If it is determined that the gearbox oil pool temperature is less than or equal to the thirteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the twelfth temperature threshold, then controlling the gearbox fan to stop running at high speed, and the thirteenth temperature threshold is less than the tenth temperature threshold but greater than the ninth temperature threshold; The ninth temperature threshold is greater than the fourth temperature threshold, the tenth temperature threshold is less than the fifth temperature threshold, the eleventh temperature threshold is less than the sixth temperature threshold, the twelfth temperature threshold is less than the seventh temperature threshold, and the thirteenth temperature threshold is less than the eighth temperature threshold.

3. The control method of the gear box fan according to claim 2, characterized in that: In the case where it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes: If it is determined that the gearbox oil pool temperature is greater than or equal to the fourteenth temperature threshold but less than the fifteenth temperature threshold, controlling the gearbox fan to start running at a low speed; If it is determined that the gearbox oil pool temperature is less than a sixteenth temperature threshold, controlling the gearbox fan to stop running at a low speed, the sixteenth temperature threshold is less than the fourteenth temperature threshold, and the fourteenth temperature threshold is less than the fifteenth temperature threshold; If it is determined that the gearbox oil pool temperature is greater than or equal to the fifteenth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventeenth temperature threshold, then controlling the gearbox fan to start high-speed operation; If it is determined that the gearbox oil pool temperature is less than or equal to the eighteenth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventeenth temperature threshold, then controlling the gearbox fan to stop high-speed operation, and the eighteenth temperature threshold is less than the fifteenth temperature threshold but greater than the fourteenth temperature threshold; The fourteenth temperature threshold is greater than the fourth temperature threshold but less than the ninth temperature threshold, the fifteenth temperature threshold is greater than the tenth temperature threshold but less than the fifth temperature threshold, the sixteenth temperature threshold is greater than the eleventh temperature threshold but less than the sixth temperature threshold, the seventeenth temperature threshold is greater than the twelfth temperature threshold but less than the seventh temperature threshold, and the eighteenth temperature threshold is greater than the thirteenth temperature threshold but less than the eighth temperature threshold.

4. The control method of the gear box fan according to claim 1, characterized in that: When it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode and the downtime of the target wind turbine set exceeds a fourth preset time, the operation of the control mode is to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: Controlling the gear box fan to stop running; Opening the temperature control valve so that the oil in the gearbox oil pool flows through the heat sink of the gearbox fan until the temperature of the gearbox oil pool is greater than or equal to a nineteenth temperature threshold, and controlling the gearbox fan to start running at a low speed, wherein the nineteenth temperature threshold is greater than the fourth temperature threshold; The fourth temperature threshold, the fifth temperature threshold, the sixth temperature threshold, the seventh temperature threshold and the eighth temperature threshold are corrected according to the operating parameters of the gear box fan after starting to run at a low speed.

5. The control method of the gear box fan according to claim 2, characterized in that: When it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode, and it is determined that the temperature rise rate of the gearbox oil pool temperature is greater than a preset temperature rise rate threshold, the control mode is operated to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment, including: If it is determined that the gearbox oil pool temperature is greater than or equal to the twentieth temperature threshold, controlling the gearbox fan to start high-speed operation, and the twentieth temperature threshold is less than the tenth temperature threshold; The ninth temperature threshold, the tenth temperature threshold, the eleventh temperature threshold, the twelfth temperature threshold and the thirteenth temperature threshold are corrected according to the operating parameters of the gear box fan after starting high-speed operation.

6. A control device for a gear box fan, characterized in that: include: A data acquisition unit, used to obtain the ambient temperature of the area where the target wind turbine is located within a preset time period; A mode control unit, configured to determine a control mode for controlling a gearbox fan of the target wind turbine generator set in combination with a system date and the ambient temperature within the preset time period; A fan control unit, used to run the control mode to control the high and low speed start and stop of the gear box fan according to the gear box oil pool temperature and the high-speed shaft bearing temperature at the current moment; The control modes include a first control mode, a second control mode and a normal control mode; The step of determining a control mode for controlling the gearbox fan of the target wind turbine generator set by combining the system date and the ambient temperature within the preset time period specifically includes: If it is determined that the system date belongs to the first date interval, and the ambient temperature within the first preset time period is lower than the first temperature threshold, then the control mode for controlling the gearbox fan of the target wind turbine set is determined to be the first control mode; If it is determined that the system date does not belong to the first date interval, and the ambient temperature within the second preset time period is higher than the second temperature threshold, then determining that the control mode for controlling the gearbox fan of the target wind turbine set is the second control mode; Otherwise, determining that the control mode for controlling the gearbox fan of the target wind turbine set is a conventional control mode; The first temperature threshold is less than the second temperature threshold; After determining that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, if the ambient temperature within a third preset time period is greater than a third temperature threshold, determining that the control mode for controlling the gearbox fan of the target wind turbine set is the normal control mode; The third temperature threshold is greater than the first temperature threshold; When it is determined that the control mode for controlling the gearbox fan of the target wind turbine set is the first control mode, the operation of the control mode to control the high and low speed start and stop of the gearbox fan according to the gearbox oil pool temperature and the high-speed shaft bearing temperature at the current moment includes: If it is determined that the gearbox oil pool temperature is greater than or equal to the fourth temperature threshold but less than the fifth temperature threshold, controlling the gearbox fan to start running at a low speed; If it is determined that the gearbox oil pool temperature is less than a sixth temperature threshold, controlling the gearbox fan to stop running at a low speed, the sixth temperature threshold is less than the fourth temperature threshold, and the fourth temperature threshold is less than the fifth temperature threshold; If it is determined that the gearbox oil pool temperature is greater than or equal to the fifth temperature threshold, or any of the high-speed shaft bearing temperatures is greater than or equal to the seventh temperature threshold, then controlling the gearbox fan to start high-speed operation; If it is determined that the gearbox oil pool temperature is less than or equal to the eighth temperature threshold, and at least two of the high-speed shaft bearing temperatures are less than the seventh temperature threshold, the gearbox fan is controlled to stop high-speed operation, and the eighth temperature threshold is less than the fifth temperature threshold but greater than the fourth temperature threshold.

7. A wind turbine generator set, characterized in that: It includes a gearbox fan and a controller for controlling the operation of the gearbox fan; The controller executes the control method of the gear box fan according to any one of claims 1-5 when running.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for controlling the gearbox fan according to any one of claims 1 to 5 are implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling the gearbox fan according to any one of claims 1 to 5 are implemented.

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