Generator Cooling Control Method and Device for Wind Turbine

Abstract

The present disclosure provides a method and device for controlling the cooling of a generator of a wind turbine. The cooling device of the generator is connected to the same frequency converter as the intermittent operation device of the wind turbine. The frequency converter does not control the start of the cooling device and the intermittent operation device at the same time. The method for controlling the cooling of the generator includes: when it is determined, according to the operation data of the wind turbine, that the start condition of the intermittent operation device is satisfied, calculating the predicted temperature of the generator after the required duration for controlling the start of the intermittent operation device by using the frequency converter to perform a predetermined related action; when the predicted temperature is less than or equal to a predetermined threshold temperature, using the frequency converter to control the start of the intermittent operation device to perform a predetermined related action; after the intermittent operation device performs a predetermined related action, using the frequency converter to control the start of the cooling device to cool the generator.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of wind power generation, and more specifically, to a method and device for controlling the cooling of a generator of a wind turbine generator set. Background Art

[0002] In the current wind power generation industry, the driving schemes for generator cooling and yaw of direct-drive and semi-direct-drive wind turbine generator sets include the following four types: First, both the driving scheme for generator cooling and the driving scheme for yaw adopt the method of directly connecting to the grid (i.e., directly connecting to a distribution transformer (connected to the grid)); Second, the driving scheme for generator cooling adopts the method of directly connecting to the grid and the driving scheme for yaw adopts the method of using a frequency converter (i.e., connecting to the distribution transformer via the frequency converter); Third, the driving scheme for generator cooling adopts the method of using a frequency converter and the driving scheme for yaw adopts the method of directly connecting to the grid; Fourth, both the driving scheme for generator cooling and the driving scheme for yaw adopt the method of using a frequency converter.

[0003] The characteristics of each of the above four schemes are as follows: For the first scheme, the cost is relatively the lowest, the starting impact is large, the capacity of the distribution transformer is large, there is a problem of yaw tripping, the self-power consumption is high, and the temperature fluctuation of the generator is large; For the second scheme, the cost is relatively low, the starting impact is relatively large, the capacity of the distribution transformer is relatively large, the self-power consumption is high, and the temperature fluctuation of the generator is large; For the third scheme, the cost is relatively low, the starting impact is relatively large, the capacity of the distribution transformer is relatively large, and there is a problem of yaw tripping; For the fourth scheme, the cost is relatively high, there is no starting impact, and the capacity of the distribution transformer is small.

[0004] In summary, it can be concluded that in the existing schemes, the schemes adopting direct connection to the grid have the following disadvantages: large starting impact, large capacity of the distribution transformer, high self-power consumption, large temperature fluctuation of the generator, and yaw tripping; The schemes adopting frequency converters have the disadvantage of high cost. Summary of the Invention

[0005] An exemplary embodiment of the present disclosure is to provide a method and device for controlling the cooling of a generator of a wind turbine generator set, so as to achieve the purpose of jointly controlling the cooling equipment of the generator and the yaw motor using the same transformer.

[0006] According to an exemplary embodiment of the present disclosure, a method for controlling the cooling of a generator of a wind turbine is provided. The cooling device of the generator is connected to the same frequency converter as the intermittent operating device of the wind turbine. The frequency converter does not control the start-up of the cooling device and the intermittent operating device simultaneously. The method for controlling the cooling of the generator includes: when it is determined, according to the operating data of the wind turbine, that the start-up condition of the intermittent operating device is satisfied, calculating the predicted temperature of the generator after the required duration for controlling the start-up of the intermittent operating device by the frequency converter to perform a predetermined related action; when the predicted temperature is less than or equal to a predetermined threshold temperature, using the frequency converter to control the start-up of the intermittent operating device to perform a predetermined related action; after the intermittent operating device performs the predetermined related action, using the frequency converter to control the start-up of the cooling device to cool the generator.

[0007] Optionally, before performing the step of using the frequency converter to control the start-up of the intermittent operating device, it may further include: using the frequency converter to control the start-up of the cooling device to cool the generator based on a first opening degree; the step of, after the intermittent operating device performs the predetermined related action, using the frequency converter to control the start-up of the cooling device to cool the generator includes: after the intermittent operating device performs the predetermined related action, using the frequency converter to control the start-up of the cooling device to cool the generator based on a second opening degree, where the first opening degree and the second opening degree are percentages of the rated output power of the frequency converter, and the first opening degree is less than the second opening degree.

[0008] Optionally, after the step of using the frequency converter to control the start-up of the cooling device to cool the generator based on the second opening degree, it may further include: when the temperature of the wind turbine reaches the static thermal equilibrium temperature, using the frequency converter to control the start-up of the cooling device to cool the generator based on the first opening degree.

[0009] Optionally, the method for controlling the cooling of the generator may further include: when the predicted temperature is greater than the predetermined threshold temperature, controlling the output power of the wind turbine to decrease, and then performing the step of determining whether the start-up condition of the intermittent operating device is satisfied according to the operating data of the wind turbine.

[0010] Optionally, the intermittent operating device may be a yaw motor of the wind turbine.

[0011] According to another exemplary embodiment of the present disclosure, a generator cooling control device for a wind turbine generator is provided. The cooling device of the generator is connected to the same frequency converter as the intermittent operation device of the wind turbine generator. The frequency converter does not control the start of the cooling device and the intermittent operation device at the same time. The generator cooling control device includes: a temperature determination module configured to calculate a predicted temperature of the generator after a required duration for using the frequency converter to control the start of the intermittent operation device to perform a predetermined related action when it is determined, according to the operation data of the wind turbine generator, that the start condition of the intermittent operation device is satisfied; an intermittent action execution module configured to use the frequency converter to control the start of the intermittent operation device to perform a predetermined related action when the predicted temperature is less than or equal to a predetermined threshold temperature; and a cooling function execution module configured to use the frequency converter to control the start of the cooling device to cool the generator after the intermittent operation device performs the predetermined related action.

[0012] Optionally, the generator cooling control device may be disposed in the main controller of the wind turbine generator.

[0013] Optionally, before the intermittent action execution module uses the frequency converter to control the start of the intermittent operation device, the cooling function execution module may further perform the following operations: using the frequency converter to control the start of the cooling device to cool the generator based on a first opening; the operation of the cooling function execution module using the frequency converter to control the start of the cooling device to cool the generator after the intermittent operation device performs the predetermined related action may include: using the frequency converter to control the start of the cooling device to cool the generator based on a second opening after the intermittent operation device performs the predetermined related action, where the first opening and the second opening are percentages of the rated output power of the frequency converter, and the first opening is less than the second opening.

[0014] Optionally, the following operations may further be performed after the operation of the cooling function execution module using the frequency converter to control the start of the cooling device to cool the generator based on the second opening: when the temperature of the wind turbine generator reaches the static thermal equilibrium temperature, using the frequency converter to control the start of the cooling device to cool the generator based on the first opening.

[0015] Optionally, the generator cooling control device may further include a power control module configured to control the reduction of the output power of the wind turbine generator when the predicted temperature is greater than the predetermined threshold temperature, and then perform the step of determining whether the start condition of the intermittent operation device is satisfied according to the operation data of the wind turbine generator.

[0016] Optionally, the intermittent operation device may be a yaw motor of the wind turbine generator.

[0017] According to another exemplary embodiment of the present disclosure, there is provided a computer-readable storage medium storing a computer program, which when executed by a processor, implements the generator cooling control method as described above.

[0018] According to another exemplary embodiment of the present disclosure, there is provided a computing device, which includes: a processor; and a memory storing a computer program, which when executed by the processor, implements the generator cooling control method as described above.

[0019] Optionally, the computing device may be disposed in the main controller of the wind turbine generator set.

[0020] According to another exemplary embodiment of the present disclosure, there is provided a wind turbine generator set, which includes: an inverter; a cooling device of the generator; a yaw motor; the generator cooling control device as described above or the computing device as described above.

[0021] For the generator cooling control method and device of the wind turbine generator set according to the exemplary embodiment of the present disclosure, by jointly controlling the cooling device of the generator and the yaw motor by using the same transformer, the beneficial effects of having a relatively small capacity of the distribution transformer, small starting impact, low self-power consumption, small temperature fluctuation of the generator, and no tripping of the yaw are achieved while ensuring a relatively low cost.

[0022] Additional aspects and / or advantages of the general concept of the present disclosure will be partially set forth in the following description, and some will be apparent from the description, or can be learned through the implementation of the general concept of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Through the following description with reference to the drawings of exemplary embodiments shown, the above and other objects and features of the exemplary embodiments of the present disclosure will become clearer, where:

[0024] Figure 1 is a flowchart showing the generator cooling control method of the wind turbine generator set according to the embodiment of the present disclosure;

[0025] Figure 2 is a schematic structural diagram of a system showing an example of implementing the generator cooling control method of the wind turbine generator set according to the embodiment of the present disclosure;

[0026] Figure 3 is a flowchart showing an example of implementing the generator cooling control method of the wind turbine generator set according to the embodiment of the present disclosure;

[0027] Figure 4 is a block diagram showing the generator cooling control device of the wind turbine generator set according to the embodiment of the present disclosure;

[0028] Figure 5 is a block diagram showing a wind power generation unit according to an embodiment of the present disclosure;

[0029] Figure 6 is a block diagram showing a computing device according to an embodiment of the present disclosure. Detailed Description

[0030] The following detailed description is provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein is merely illustrative and is not limited to those set forth herein, but may be changed as will be apparent after understanding the disclosure of the present application, except for operations that must occur in a particular order. Additionally, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0031] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Instead, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein, which will be apparent after understanding the disclosure of the present application.

[0032] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more thereof.

[0033] The terms used herein are for describing various examples only and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising," "including," and "having" specify the presence of the recited features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs after understanding the present disclosure. Unless explicitly defined herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal manner.

[0035] Furthermore, in the description of the examples, when a detailed description of a related structure or function that is considered well-known would obscure the interpretation of the present disclosure, such detailed description will be omitted.

[0036] Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, where like reference numerals always refer to like components. The embodiments will be described below with reference to the accompanying drawings to explain the present disclosure.

[0037] Figure 1 is a flowchart showing a generator cooling control method 100 of a wind turbine according to an embodiment of the present disclosure. According to an embodiment of the present disclosure, the cooling device of the generator is connected to the same frequency converter as the intermittent operation device of the wind turbine, and the frequency converter does not control the start of the cooling device and the intermittent operation device at the same time.

[0038] Refer to Figure 1 , in step S101, when it is determined according to the operation data of the wind turbine that the start condition of the intermittent operation device is met, calculate the predicted temperature of the generator after the required time for starting the intermittent operation device to perform a predetermined related action by using the frequency converter.

[0039] According to an embodiment of the present disclosure,

[0040] In step S102, when the predicted temperature is less than or equal to a predetermined threshold temperature, use the frequency converter to control the start of the intermittent operation device to perform a predetermined related action.

[0041] According to an embodiment of the present disclosure, before performing the above-mentioned control of starting the intermittent operation device by using the frequency converter, the following steps may further be included: use the frequency converter to control the start of the cooling device to cool the generator based on a first opening degree.

[0042] According to an embodiment of the present disclosure, the opening degree (for example, the first opening degree described above and the second opening degree to be described later) involved in the present disclosure is a percentage of the rated output power of the frequency converter. Optionally, the value of the first opening degree is greater than 0 and less than 1.

[0043] In step S103, after the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device to cool the generator.

[0044] According to an embodiment of the present disclosure, the step of using the frequency converter to control the start of the cooling device to cool the generator in step S103 may include: after the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device to cool the generator based on a second opening degree.

[0045] As an example, the value of the second opening degree is greater than 0 and less than 1.1.

[0046] Optionally, the first opening degree is less than the second opening degree.

[0047] Optionally, after the step of starting the cooling device based on the second opening degree by using the frequency converter to cool the generator, the following steps may further be included: when the temperature of the wind turbine reaches the static thermal equilibrium temperature, starting the cooling device based on the first opening degree by using the frequency converter to cool the generator.

[0048] According to an embodiment of the present disclosure, optionally, the generator cooling control method 100 may further include the following steps: when the predicted temperature is greater than a predetermined threshold temperature, controlling to reduce the output power of the wind turbine, and then performing the step of determining whether the start condition of the intermittent operation device is satisfied according to the operation data of the wind turbine.

[0049] According to an embodiment of the present disclosure, the above intermittent operation device may be a yaw motor of the wind turbine. In this case, the calculation formula of the predicted temperature may be the following formula (1):

[0050]

[0051] where, T 2 represents the predicted temperature, T 1 represents the static thermal equilibrium temperature, β 1 represents the first opening degree, P f represents the heat dissipation power of the generator when the value of the first opening degree is 1, S 1 represents the yaw speed, θ 1 represents the wind-facing angle, C 1 represents the heat capacity of the generator.

[0052] According to an embodiment of the present disclosure, the calculation formula of the interval time Δt required for starting the cooling device based on the second opening degree by using the frequency converter to cool the generator may be the following formula (2):

[0053]

[0054] where, β 2 represents the second opening degree.

[0055] Next, with reference to Figure 2 and Figure 3 the system structure and flowchart for implementing the generator cooling control method 100 will be described in detail. Figure 2 FIG. 200 is a schematic diagram of a system structure showing an example of implementing the generator cooling control method of a wind turbine according to an embodiment of the present disclosure, Figure 3 FIG. 300 is a flowchart showing an example of implementing the generator cooling control method of a wind turbine according to an embodiment of the present disclosure. As an example, in this example, the cooling device of the generator is a motor cooling fan, and the intermittent operation device is a yaw motor.

[0056] With reference toFigure 2 According to an example of a system structure for implementing a generator cooling control method of a wind turbine according to an embodiment of the present disclosure, it includes a distribution transformer T1, a frequency converter C1, a motor cooling fan G1, and a yaw motor G2.

[0057] Specifically, one end of the distribution transformer is connected to the power grid (for example, an external high-voltage power grid), and the other end is connected to the frequency converter. The input end IN1 of the frequency converter is connected to the distribution transformer, and the output end OUT1 is connected to a contactor Q1 (for example, pin 1 of the contactor Q1) and a contactor Q2 (for example, pin 1 of the contactor Q2). The motor cooling fan is connectably connected to the frequency converter via the contactor Q1 (for example, pin 2 of the contactor Q1). The yaw motor is connectably connected to the frequency converter via the contactor Q2 (for example, pin 2 of the contactor Q2). The contactors Q1 and Q2 are not simultaneously turned on.

[0058] Referring to Figure 3 , in step S301, the contactor Q1 remains turned on, and the frequency converter C1 controls the motor cooling fan G1 to cool the generator. At this time, the wind turbine is in a normal operating state.

[0059] In step S302, the frequency converter C1 maintains control of the motor cooling fan G1 based on the first opening β 1 such that the temperature of the generator reaches the thermal equilibrium temperature T0;

[0060] In step S303, it is determined whether the wind direction angle θ of the wind turbine (hereinafter simply referred to as the unit) 1 is greater than or equal to the yaw operation design value θ 0 . If the value of θ 1 is greater than or equal to the yaw operation design value θ 0 , it is determined that a yaw operation (for example, yaw alignment with the wind) may be required, otherwise, return to step S301 to maintain the normal operating state of the unit;

[0061] In step S304, according to the formula (1) mentioned above, the predicted temperature T2 of the generator after the yaw operation is completed is calculated, and T2 is compared with the maximum allowable temperature T of the generator max .

[0062] If T2 is greater than T max , then in step S305, the power of the unit is reduced, and then return to execute step S302.

[0063] If T2 is less than or equal to T max then perform the yaw operation, then in step S306, the contactor Q1 is turned off and the contactor Q2 is turned on, so as to control the yaw motor by the frequency converter C1 to perform the yaw operation.

[0064] In step S307, the frequency converter C1 yaws according to the parameters of the yaw motor and the specified yaw rate S1, and finally completes this yaw operation.

[0065] In step S308, after the yaw operation is completed, calculate the temperature △T that the generator needs to reduce according to the generator temperature before and after yaw (that is, T2 - T0).

[0066] In step S309, disconnect the contactor Q2 and turn on the contactor Q1, so as to control the motor cooling fan G1 by using the frequency converter C1.

[0067] In step S310, make the frequency converter control the motor cooling fan G1 based on the second opening β 2 and calculate the interval time △t required for the generator temperature to recover from T2 to T1 (calculated according to the formula (2) mentioned above).

[0068] In step S311, prohibit the execution of the yaw operation within the time △t, monitor the generator temperature, and when the generator temperature recovers to T0, make the frequency converter C1 control the motor cooling fan G1 based on the first opening β 1 At this time, the wind turbine generator set resumes normal operation.

[0069] It should be noted that the above embodiments of the present invention are only examples, and the present invention is not limited thereto.

[0070] Optionally, the cooling device according to the embodiment of the present disclosure may include a heat dissipation device capable of implementing various cooling methods, for example, an air-air cooling heat dissipation device (including a fan), an air-water cooling heat dissipation device (also including a fan and a water pump), a water-air cooling heat dissipation device (including a fan and a water pump), etc.

[0071] By adopting the generator cooling control method of the present disclosure, the control evaluation in the dynamic thermal equilibrium state is realized in addition to the control evaluation in the traditional static thermal equilibrium state. By jointly controlling the cooling device of the generator and the intermittent operation device (for example, the yaw motor) by using the same transformer, the beneficial effects of small distribution transformer capacity, small starting impact, low self-power consumption, small generator temperature fluctuation, and no yaw tripping are achieved while ensuring a relatively low cost.

[0072] Figure 4 It is a block diagram showing a generator cooling control device 400 of a wind turbine generator set according to an embodiment of the present disclosure. According to an embodiment of the present disclosure, the cooling device of the generator and the intermittent operation device of the wind turbine generator set are connected to the same frequency converter, and the frequency converter does not control the start of the cooling device and the intermittent operation device at the same time.

[0073] Refer to Figure 4, the generator cooling control device 400 of the wind turbine according to an embodiment of the present disclosure includes a temperature determination module 401, an intermittent operation execution module 402, and a cooling function execution module 403.

[0074] Specifically, according to an embodiment of the present disclosure, the temperature determination module 401 is configured to: when it is determined, based on the operation data of the wind turbine, that the start condition of the intermittent operation device is satisfied, calculate the predicted temperature of the generator after the required duration for starting the intermittent operation device using the frequency converter to perform a predetermined related action.

[0075] According to an embodiment of the present disclosure, the intermittent operation execution module 402 is configured to: when the predicted temperature is less than or equal to a predetermined threshold temperature, use the frequency converter to control the start of the intermittent operation device to perform a predetermined related action. Optionally, before the intermittent operation execution module 402 executes the operation of using the frequency converter to control the start of the intermittent operation device, the cooling function execution module 403 may further perform the following operation: use the frequency converter to control the start of the cooling device based on a first opening degree to cool the generator.

[0076] According to an embodiment of the present disclosure, the cooling function execution module 403 is configured to: after the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device to cool the generator. Optionally, the operation of the cooling function execution module 403 using the frequency converter to control the start of the cooling device to cool the generator after the intermittent operation device performs a predetermined related action may include: after the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device based on a second opening degree to cool the generator.

[0077] It should be understood that the specific descriptions regarding the first opening degree and the second opening degree have been set forth above. To avoid repetition, they will not be elaborated here. Figure 1

[0078] According to an embodiment of the present disclosure, optionally, after the operation of the cooling function execution module 403 using the frequency converter to control the start of the cooling device based on the second opening degree to cool the generator, the following operation may further be performed: when the temperature of the wind turbine reaches the static thermal equilibrium temperature, use the frequency converter to control the start of the cooling device based on the first opening degree to cool the generator.

[0079] According to an embodiment of the present disclosure, the generator cooling control device 400 may further include a power control module (not shown). The power control module is configured to: when the predicted temperature is greater than a predetermined threshold temperature, control to reduce the output power of the wind turbine, and then perform the step of determining whether the start condition of the intermittent operation device is satisfied based on the operation data of the wind turbine.

[0080] ​According to an embodiment of the present disclosure, the intermittently operating device may be a yaw motor of a wind turbine generator. It should be understood that the predicted temperature in this case and the calculation formula for the interval time Δt required to control the start of the cooling device based on the second opening degree by using the frequency converter to cool the generator have been described with reference to Figure 1 and will not be elaborated here.

[0081] Optionally, the generator cooling control device according to an embodiment of the present disclosure may be provided in the main controller of the wind turbine generator.

[0082] Figure 5 FIG. is a block diagram showing a wind turbine generator 500 according to an embodiment of the present disclosure.

[0083] Referring to Figure 5 , the wind turbine generator 500 according to an embodiment of the present disclosure includes a frequency converter 501, a cooling device 502 for the generator, a yaw motor 503, and a controller 504. According to an embodiment of the present disclosure, the cooling device 502 and the yaw motor 503 are connected to the same frequency converter 501, and the frequency converter 501 does not control the start of the cooling device 502 and the yaw motor 503 simultaneously.

[0084] Optionally, the controller 504 according to an embodiment of the present disclosure may be the generator cooling control device as described above (for example, the generator cooling control device 400) or the computing device (for example, the computing device 600) to be described with reference to Figure 6 .

[0085] Specifically, the controller 504 is configured to perform the following operations: when it is determined according to the operation data of the wind turbine generator 500 that the start condition of the yaw motor 503 is satisfied, calculate the predicted temperature of the generator after the required duration for starting the yaw motor 503 by using the frequency converter 501 to perform the yaw movement; when the predicted temperature is less than or equal to a predetermined threshold temperature, use the frequency converter 501 to control the start of the yaw motor to perform the yaw movement; after the yaw motor 503 performs the yaw movement, use the frequency converter 501 to control the start of the cooling device 502 to cool the generator.

[0086] It should be understood that the controller 504 may also perform various steps and operations as described in Figure 1 and will not be elaborated here to avoid repetition.

[0087] Figure 6 FIG. is a block diagram showing a computing device according to an embodiment of the present disclosure.

[0088] Referring to Figure 6, a computing device 600 according to an embodiment of the present disclosure may include a processor 610 and a memory 620. The processor 610 may include (but is not limited to) a central processing unit (CPU), a digital signal processor (DSP), a microcomputer, a field programmable gate array (FPGA), a system on chip (SoC), a microprocessor, an application specific integrated circuit (ASIC), etc. The memory 620 may store a computer program to be executed by the processor 610. The memory 620 includes high-speed random access memory and / or non-volatile computer-readable storage media. When the processor 610 executes the computer program stored in the memory 620, the generator cooling control method as described above may be implemented. The computing device 600 according to an embodiment of the present disclosure may be disposed in the main controller of a wind turbine generator set.

[0089] The generator cooling control method according to an embodiment of the present disclosure may be written as a computer program and stored on a computer-readable storage medium. When the computer program is executed by a processor, the generator cooling control method as described above may be implemented. Examples of computer-readable storage media include: read-only memory (ROM), random access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, non-volatile memory, CD-ROM, CD-R, CD+R, CD-RW, CD+RW, DVD-ROM, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, Blu-ray or optical disc memory, hard disk drive (HDD), solid state drive (SSD), cartridge memory (such as, multimedia card, secure digital (SD) card or extreme digital (XD) card), magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk, and any other device configured to store a computer program and any associated data, data files, and data structures in a non-transitory manner and provide the computer program and any associated data, data files, and data structures to a processor or computer such that the processor or computer can execute the computer program. In one example, the computer program and any associated data, data files, and data structures are distributed across a networked computer system such that the computer program and any associated data, data files, and data structures are stored, accessed, and executed in a distributed manner by one or more processors or computers.

[0090] The generator cooling control method and device according to the embodiments of the present disclosure realize the beneficial effects of small distribution transformer capacity, small starting impact, low self-power consumption, small temperature fluctuation of the generator, and no yaw tripping while ensuring relatively low cost by jointly controlling the cooling equipment of the generator and the yaw motor using the same transformer.

[0091] Although some exemplary embodiments of the present disclosure have been shown and described, those skilled in the art should understand that these embodiments can be modified and varied without departing from the principles and spirit of the present disclosure defined by the claims and their equivalents.

Claims

1. A method for controlling the cooling of a generator of a wind power generation unit, characterized in that, the cooling device of the generator and the intermittent operation device of the wind power generation unit are connected to the same frequency converter, and the frequency converter does not control the start of the cooling device and the intermittent operation device at the same time. The method for controlling the cooling of the generator includes: When it is determined according to the operation data of the wind power generation unit that the start condition of the intermittent operation device is satisfied, calculate the predicted temperature of the generator after the required duration for using the frequency converter to control the start of the intermittent operation device to perform a predetermined related action; When the predicted temperature is less than or equal to a predetermined threshold temperature, use the frequency converter to control the start of the intermittent operation device to perform a predetermined related action; After the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device to cool the generator.

2. The control method according to claim 1, characterized in that, before performing the step of using the frequency converter to control the start of the intermittent operation device, it further includes: using the frequency converter to control the start of the cooling device to cool the generator based on a first opening degree; The step of, after the intermittent operation device performs a predetermined related action, using the frequency converter to control the start of the cooling device to cool the generator includes: after the intermittent operation device performs a predetermined related action, using the frequency converter to control the start of the cooling device to cool the generator based on a second opening degree, wherein, the first opening degree and the second opening degree are percentages of the rated output power of the frequency converter, and the first opening degree is less than the second opening degree.

3. The control method according to claim 2, characterized in that, after the step of using the frequency converter to control the start of the cooling device to cool the generator based on the second opening degree, it further includes: when the temperature of the wind power generation unit reaches the static thermal equilibrium temperature, using the frequency converter to control the start of the cooling device to cool the generator based on the first opening degree.

4. The control method according to any one of claims 1-3, characterized in that, it further includes: when the predicted temperature is greater than the predetermined threshold temperature, control to reduce the output power of the wind power generation unit, and then perform the step of determining whether the start condition of the intermittent operation device is satisfied according to the operation data of the wind power generation unit.

5. The control method according to claim 4, characterized in that, the intermittent operation device is a yaw motor of the wind power generation unit.

6. A device for controlling the cooling of a generator of a wind power generation unit, characterized in that, the cooling device of the generator and the intermittent operation device of the wind power generation unit are connected to the same frequency converter, and the frequency converter does not control the start of the cooling device and the intermittent operation device at the same time. The device for controlling the cooling of the generator includes: a temperature determination module configured to: when it is determined according to the operation data of the wind power generation unit that the start condition of the intermittent operation device is satisfied, calculate the predicted temperature of the generator after the required duration for using the frequency converter to control the start of the intermittent operation device to perform a predetermined related action; The intermittent action execution module is configured to: when the predicted temperature is less than or equal to a predetermined threshold temperature, use the frequency converter to control the start of the intermittent operation device to perform a predetermined related action; The cooling function execution module is configured to: after the intermittent operation device performs a predetermined related action, use the frequency converter to control the start of the cooling device to cool the generator.

7. The generator cooling control device according to claim 6, wherein, the generator cooling control device is arranged in the main controller of the wind power generating set.

8. A computer-readable storage medium storing a computer program, wherein, when the computer program is executed by a processor, it implements the generator cooling control method according to any one of claims 1 to 5.

9. A computing device, wherein, the computing device includes: a processor; and a memory storing a computer program, when the computer program is executed by the processor, it implements the generator cooling control method according to any one of claims 1 to 5.

10. The computing device according to claim 9, wherein, the computing device is arranged in the main controller of the wind power generating set.

11. A wind power generating set, wherein, the wind power generating set includes: a frequency converter; a cooling device for the generator; a yaw motor; the generator cooling control device according to claim 6 or 7 or the computing device according to claim 9 or 10.

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