Wind driven generator and heat dissipation system and method thereof

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind driven generator and a heat dissipation system and method thereof. The heat dissipation system comprises a first temperature detection mechanism arranged outside a cabin and used for obtaining the environment temperature; the second temperature detection mechanism is arranged in the cabin and used for obtaining the temperature in the cabin; the rainfall detection mechanism is arranged outside the cabin and used for detecting the rainfall state; the heat dissipation mechanism comprises a heat dissipation opening formed in the cabin cover and an execution unit used for controlling opening and closing of the heat dissipation opening; the driving mechanism is used for driving the wind driven generator to operate; and the control module is used for receiving the operation state, the environment temperature, the cabin temperature and the rainfall state of the wind driven generator and sending a control instruction to the heat dissipation mechanism and the driving mechanism so as to control the execution unit to open or close the heat dissipation opening and / or control the driving mechanism to adjust the output power of the wind driven generator, and at least the heat dissipation efficiency of the wind driven generator can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of wind power generation, and in particular to a wind power generator and a heat dissipation system and method thereof. BACKGROUND

[0002] In recent years, wind energy has been widely used as a renewable and environmentally friendly energy source worldwide, especially in the field of wind power generation. As an innovative power generation technology, wind power generation has received widespread attention due to its sustainability and environmental friendliness.

[0003] However, during the operation of the wind power generator, especially in the cabin, a large amount of heat is generated due to the mechanical operation and the work of electrical components. If this heat cannot be effectively dissipated, it will adversely affect the performance and reliability of the wind power generator. Therefore, how to efficiently dissipate heat for the wind power generator has become a key problem to be solved. SUMMARY

[0004] The present disclosure provides a wind power generator and a heat dissipation system and method thereof, which can at least improve the heat dissipation efficiency of the wind power generator.

[0005] According to some embodiments of the present disclosure, the present disclosure provides a heat dissipation system of a wind power generator, the wind power generator comprising a cabin, the heat dissipation system comprising: a first temperature detection mechanism arranged outside the cabin and configured to obtain an ambient temperature; a second temperature detection mechanism arranged inside the cabin and configured to obtain an internal cabin temperature; a rainfall detection mechanism arranged outside the cabin and configured to detect a rainfall state; a heat dissipation mechanism comprising a heat dissipation port arranged on a cabin cover of the cabin and an execution unit for controlling opening and closing of the heat dissipation port; a driving mechanism arranged inside the cabin and configured to drive the wind power generator to operate; a control module arranged inside the cabin and electrically connected with the first temperature detection mechanism, the second temperature detection mechanism, the rainfall detection mechanism, the heat dissipation mechanism and the driving mechanism; the control module is configured to receive an operating state of the wind power generator, the ambient temperature, the internal cabin temperature and the rainfall state, and send control instructions to the heat dissipation mechanism and the driving mechanism to control the execution unit to open or close the heat dissipation port and / or control the driving mechanism to adjust the output power of the wind power generator.

[0006] In some embodiments, the control module includes: a judgment unit configured to judge whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and judge whether it is raining; and a control unit configured to send a control command to the heat dissipation mechanism to control the execution unit to open the heat dissipation vent if the wind turbine is operating at full power, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is no rain.

[0007] In some embodiments, the determining unit is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; the control unit is further configured to send a control command to the heat dissipation mechanism to control the execution unit to close the heat dissipation vent if the wind turbine is operating at full power and the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference or if there is rainfall; wherein the second preset temperature difference is less than the first preset temperature difference.

[0008] In some embodiments, the control module includes: a judgment unit configured to judge whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and judge whether it is raining; and a control unit configured to send a control command to the drive mechanism to control the drive mechanism to reduce the output power of the wind turbine if the wind turbine is operating at full power, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall.

[0009] In some embodiments, the determining unit is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; the control unit is further configured to send a control command to the drive mechanism when the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference, so as to control the drive mechanism to adjust the output power of the wind turbine to a preset power.

[0010] In some embodiments, the heat dissipation mechanism further includes an insect-proof net covering the heat dissipation vent.

[0011] In some embodiments, the heat dissipation vents are located on the top, bottom, or side of the nacelle cover.

[0012] According to some embodiments of this disclosure, another aspect of this disclosure also provides a heat dissipation method for a wind turbine, applied to the heat dissipation system of the wind turbine described in any of the above embodiments. The wind turbine includes a nacelle, and the heat dissipation method includes: acquiring the operating status of the wind turbine, the ambient temperature outside the nacelle, the internal temperature of the nacelle, and the rainfall status outside the nacelle; based on the operating status, the ambient temperature, the internal temperature, and the rainfall status, controlling the opening or closing of heat dissipation vents disposed on the nacelle cover, and / or adjusting the output power of the wind turbine.

[0013] In some embodiments, controlling the opening or closing of the heat dissipation vents on the nacelle cover based on the operating state, the ambient temperature, the cabin temperature, and the rainfall status includes: determining whether the wind turbine is operating at full power, comparing the difference between the ambient temperature and the cabin temperature with a preset temperature difference, and determining whether it is raining; if the wind turbine is operating at full power, and the difference between the cabin temperature and the ambient temperature is greater than or equal to a first preset temperature difference, and there is no rainfall, then the heat dissipation vents are opened.

[0014] In some embodiments, the heat dissipation method further includes: comparing the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; if the wind turbine is operating at full power and the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference or there is rainfall, then closing the heat dissipation vent; wherein the second preset temperature difference is less than the first preset temperature difference.

[0015] In some embodiments, adjusting the output power of the wind turbine based on the operating state, the ambient temperature, the cabin temperature, and the rainfall status includes: determining whether the wind turbine is operating at full power, comparing the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and determining whether it is raining; if the wind turbine is operating at full power, and the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall, then the output power of the wind turbine is reduced.

[0016] In some embodiments, the heat dissipation method further includes: comparing the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; when the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference, adjusting the current rotational speed of the wind turbine to a preset power.

[0017] According to some embodiments of this disclosure, another aspect of this disclosure also provides a wind turbine generator, including a heat dissipation system for the wind turbine generator as described in any of the above embodiments.

[0018] The technical solution provided in this disclosure has at least the following advantages: The wind turbine cooling system provided in this disclosure constructs a multi-parameter collaborative control cooling architecture by installing a second temperature detection mechanism inside the nacelle, a first temperature detection mechanism and a rainfall detection mechanism outside the nacelle, and combining them with heat dissipation vents, a drive mechanism, and a control module located on the nacelle cover. The control module can receive the wind turbine's operating status, ambient temperature, nacelle temperature, and rainfall status, and accordingly send control commands to the cooling mechanism and drive mechanism to control the opening or closing of the heat dissipation vents and / or adjust the wind turbine's output power. This system achieves dynamic coordination between cooling behavior and power generation load by comprehensively sensing the internal and external environment and equipment operating status. While ensuring safe equipment operation, it effectively alleviates the problem of temperature rise inside the nacelle, reduces the risk of power limitation or shutdown due to overheating, and balances cooling efficiency, operational reliability, and overall economy. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 A schematic diagram of a heat dissipation system for a wind turbine provided in an embodiment of this disclosure; Figure 2 A schematic diagram of the structure of a control module provided in an embodiment of this disclosure; Figure 3 A schematic diagram of one method of opening a heat dissipation vent provided in an embodiment of this disclosure; Figure 4 Another schematic diagram of one of the opening methods of the heat dissipation vent provided in the embodiments of this disclosure; Figure 5 A schematic diagram of a second method for opening the heat dissipation vent provided in an embodiment of this disclosure; Figure 6 Another schematic diagram of the second opening method of the heat dissipation vent provided in the embodiments of this disclosure; Figure 7 A schematic diagram of a third method for opening the heat dissipation vent according to an embodiment of this disclosure; Figure 8 A schematic diagram illustrating a fourth method of opening the heat dissipation vent according to an embodiment of this disclosure; Figure 9A schematic diagram illustrating a fifth method of opening the heat dissipation vent according to an embodiment of this disclosure; Figure 10 A schematic diagram of one method of opening the heat dissipation vent according to an embodiment of this disclosure; Figure 11 Another schematic diagram of the sixth method of opening the heat dissipation vent provided in the embodiments of this disclosure; Figure 12 A schematic diagram of a seventh method for opening a heat dissipation vent according to an embodiment of this disclosure; Figure 13 A schematic flowchart illustrating a heat dissipation method for a wind turbine provided in an embodiment of this disclosure; Figure 14 A schematic flowchart illustrating another method for heat dissipation of a wind turbine provided in this embodiment of the present disclosure; Figure 15 A schematic flowchart illustrating another method for heat dissipation of a wind turbine provided in this embodiment of the present disclosure; Figure 16 A schematic flowchart illustrating another method for heat dissipation of a wind turbine provided in an embodiment of this disclosure; Figure 17 This is a schematic diagram of a wind turbine generator provided in an embodiment of the present disclosure.

[0021] Explanation of reference numerals in the attached figures: The wind turbine includes a cooling system 10, a first temperature detection mechanism 1, a second temperature detection mechanism 2, a rainfall detection mechanism 3, a cooling mechanism 4, a drive mechanism 5, a control module 6, a nacelle 20, a nacelle cover 21, a heat dissipation vent 41, an execution unit 42, a judgment unit 61, a control unit 62, an insect net 43, a main shaft 30, and a wind turbine 100. Detailed Implementation

[0022] The basic principle of wind turbine generators is to convert the kinetic energy of the air captured by the blades into mechanical energy, drive the generator to rotate through the mechanical transmission system, generate an induced electromotive force, and then achieve grid-connected control and power regulation through the frequency converter. Finally, the voltage is stepped up by the transformer and output through the cable.

[0023] During this energy conversion process, a significant amount of heat accumulates inside the nacelle due to transmission efficiency losses in the mechanical transmission chain (especially the gearbox) and the continuous heat generated by the generator, frequency converter, transformer, and various electrical control equipment. Although existing wind turbine generators are generally equipped with air-cooled or water-cooled heat dissipation systems to cope with the heat load, in actual operation, the temperature inside the nacelle is still significantly higher than the external ambient temperature, with the temperature difference typically maintained at around 10°C. Especially under extreme conditions of high summer temperatures combined with full-power power generation, the heat inside the nacelle is difficult to dissipate effectively, causing the temperature of critical components to rise rapidly. This can easily trigger the overheat protection mechanism, resulting in power-limited operation of the wind turbine or even unplanned shutdown, seriously affecting power generation efficiency and equipment reliability.

[0024] To address the aforementioned issues, the conventional approach in this field is to further enhance cooling capabilities, such as increasing radiator size, increasing the number of fans, or employing a liquid cooling system. However, such solutions not only significantly increase the overall manufacturing cost and maintenance complexity, but also, in a closed chassis structure, relying solely on internal circulation for heat dissipation still makes it difficult to effectively utilize external low-temperature environmental resources, resulting in limited improvements in heat dissipation efficiency.

[0025] Based on this, this disclosure creatively proposes a heat dissipation system for wind turbines. By setting controllable opening and closing heat dissipation vents on the nacelle cover, and combining multi-parameter sensing and coordinated control of the nacelle temperature, ambient temperature, rainfall status, and wind turbine operating status, external cold air is dynamically introduced for convective heat exchange while ensuring safe operation of the equipment. This effectively reduces the internal temperature of the nacelle under extreme high-temperature full-power conditions, alleviates heat accumulation problems, avoids unnecessary power limitations or shutdowns, and achieves a dual improvement in power generation performance and system reliability.

[0026] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0029] refer to Figure 1 The cooling system 10 of the wind turbine provided in this embodiment includes: a first temperature detection mechanism 1, a second temperature detection mechanism 2, a rainfall detection mechanism 3, a cooling mechanism 4, a drive mechanism 5, and a control module 6.

[0030] The wind turbine includes a nacelle 20, a first temperature detection mechanism 1 located outside the nacelle and configured to acquire ambient temperature; a second temperature detection mechanism 2 located inside the nacelle 20 and configured to acquire the nacelle temperature; a rainfall detection mechanism 3 located outside the nacelle 20 and configured to detect rainfall; a heat dissipation mechanism 4 including a heat dissipation vent 41 located on the nacelle cover 21 of the nacelle 20 and an execution unit 42 for controlling the opening and closing of the heat dissipation vent 41; a drive mechanism 5 located inside the nacelle 20 and configured to drive the wind turbine; and a control module 6 located inside the nacelle 20 and electrically connected to the first temperature detection mechanism 1, the second temperature detection mechanism 2, the rainfall detection mechanism 3, the heat dissipation mechanism 4, and the drive mechanism 5. The control module 6 is configured to receive the operating status of the wind turbine, ambient temperature, nacelle temperature, and rainfall, and send control commands to the heat dissipation mechanism 4 and the drive mechanism 5 to control the execution unit 42 to open or close the heat dissipation vent 41, and / or control the drive mechanism 5 to adjust the output power of the wind turbine.

[0031] In some embodiments, the first temperature detection unit 1 may be installed in a well-ventilated location outside the nacelle 20, away from direct sunlight or rain, such as the leeward side of the tail of the wind turbine, to accurately reflect the ambient air temperature.

[0032] In some embodiments, the second temperature detection mechanism 2 may be arranged near the heat source concentration area inside the cabin 20, such as next to the gearbox housing, near the generator windings, or at the outlet of the inverter cooling duct, in order to accurately capture the thermal state of critical components.

[0033] In some embodiments, the first temperature detection mechanism 1 and the second temperature detection mechanism 2 may be temperature measuring elements such as temperature sensors.

[0034] In some embodiments, the rainfall detection mechanism 3 is located in an unobstructed area outside the cabin 20 and is used to accurately detect whether there is rainfall. It may employ existing devices such as infrared rainfall sensors or capacitive raindrop detectors.

[0035] In some embodiments, multiple heat dissipation mechanisms 4 may be provided.

[0036] For example, the execution unit 42 may include a hydraulic station and a hydraulic cylinder; the hydraulic station is connected to the hydraulic cylinder through a pipeline to provide high-pressure hydraulic oil; the piston rod of the hydraulic cylinder is drivenly connected to the heat dissipation port 41; when the control unit sends an open or close command, the hydraulic station controls the flow of hydraulic oil and drives the piston rod to extend or retract, thereby opening or closing the heat dissipation port 41.

[0037] It should be noted that the type of control module 6 can be a microcontroller, ARM (Advanced RISC Machines), or FPGA (Field Programmable Gate Array), etc., which can be determined according to the actual design requirements.

[0038] The wind turbine cooling system provided in this disclosure constructs a multi-parameter collaborative control cooling architecture by installing a second temperature detection mechanism inside the nacelle, a first temperature detection mechanism and a rainfall detection mechanism outside the nacelle, and combining them with controllable heat dissipation vents, a drive mechanism, and a control module located on the nacelle cover. The control module can receive the wind turbine's operating status, ambient temperature, nacelle temperature, and rainfall status, and accordingly send control commands to the cooling mechanism and drive mechanism to control the opening or closing of the heat dissipation vents and / or adjust the wind turbine's output power. This system achieves dynamic coordination between cooling behavior and power generation load by comprehensively sensing the internal and external environment and equipment operating status. While ensuring safe equipment operation, it effectively alleviates the problem of temperature rise inside the nacelle, reduces the risk of power limitation or shutdown due to overheating, and balances cooling efficiency, operational reliability, and overall economy.

[0039] The embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0040] refer to Figure 2 As shown, in some embodiments, the control module 6 includes: a judgment unit 61, configured to judge whether the wind turbine is in full-power operation, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and judge whether it is raining; and a control unit 62, configured to send a control command to the heat dissipation mechanism 4 to control the execution unit to open the heat dissipation port 41 if the wind turbine is in full-power operation, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is no rain.

[0041] In some embodiments, the judgment unit 61 is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; the control unit 62 is further configured to send a control command to the heat dissipation mechanism 4 to control the execution unit 42 to close the heat dissipation port 41 if the wind turbine is in full-power operation and the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference or there is rainfall; wherein the second preset temperature difference is less than the first preset temperature difference.

[0042] Specifically, the conditions for opening the heat dissipation vent 41 include the following three: the wind turbine is operating at full power, the temperature difference between the cabin interior and the ambient temperature is greater than or equal to a first preset temperature difference, and there is no rainfall. The heat dissipation vent 41 is opened when all three conditions are met. The heat dissipation vent 41 is not opened if any of the three conditions are not met. Furthermore, after the heat dissipation vent 41 is opened, the system continuously monitors the temperature difference between the ambient and cabin interior and the rainfall status. If the temperature difference between the cabin interior and the ambient temperature is determined to be less than a second preset temperature difference, or if rainfall is detected, the heat dissipation vent 41 is closed to prevent rainwater intrusion.

[0043] It is understandable that the second preset temperature difference is set to be less than the first preset temperature difference. For example, if the first preset temperature difference is 8°C, the second preset temperature difference can be set to 5°C, forming a temperature difference control range with hysteresis characteristics, so as to avoid the heat dissipation port 41 from frequently starting and stopping near the critical temperature difference.

[0044] For example, in a certain operating scenario, the first preset temperature difference is set to 8℃, and the second preset temperature difference is set to 5℃. A wind turbine is operating at full power in hot summer weather. The ambient temperature is 35℃, and the temperature inside the nacelle rises to 44℃ due to continuous heating from the heat source. At this time, the judgment unit 61 determines that the temperature difference between the inside and outside of the nacelle exceeds the first preset temperature difference, and the rainfall detection mechanism does not detect rainfall. Based on this, the judgment unit 61 confirms that all opening conditions are met, and the control unit 62 sends an opening command to the heat dissipation mechanism 4, controlling the execution unit 42 to open the heat dissipation vent 41 on the nacelle cover 21 to introduce external air for convection cooling. As heat dissipation proceeds, the temperature inside the nacelle gradually drops to 39℃. The judgment unit 61 determines that the temperature difference between the inside and outside of the nacelle is lower than the second preset temperature difference. At this time, the control unit 62 sends a control command to the heat dissipation mechanism 4 to control the execution unit 42 to close the heat dissipation vent 41. It is worth noting that if rainfall occurs suddenly during this process, the heat dissipation vent 41 will also close immediately regardless of the temperature difference to prevent rainwater from entering the nacelle.

[0045] The above control logic combines full-power operation status, temperature difference between inside and outside the cabin, and rainfall status to make multi-condition coordinated judgments, effectively realizing the precise triggering and timely shutdown of heat dissipation behavior. Under high-load and high-temperature conditions that require enhanced heat dissipation, it makes full use of natural cold sources to reduce the cabin temperature. At the same time, it quickly closes the heat dissipation vents when the heat dissipation effect is insufficient or when there is rainfall. This not only avoids the risk of dust and rainwater intrusion caused by ineffective ventilation, but also prevents the actuator from frequently starting and stopping due to critical temperature fluctuations, significantly improving the stability of the system, equipment safety, and environmental adaptability.

[0046] In some embodiments, the control module 6 further includes: a judgment unit 61, configured to judge whether the wind turbine is in full-power operation, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and judge whether there is rainfall; and a control unit 62, configured to send a control command to the drive mechanism 5 to control the drive mechanism 5 to reduce the output power of the wind turbine if the wind turbine is in full-power operation, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall.

[0047] In some embodiments, the judgment unit 61 is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; the control unit 62 is further configured to send a control command to the drive mechanism 5 when the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference, so as to control the drive mechanism 5 to adjust the output power of the wind turbine to a preset power.

[0048] Specifically, when the wind turbine is operating at full power and the temperature difference between the nacelle and the ambient temperature is greater than or equal to a first preset temperature difference, if rainfall is detected, heat cannot be dissipated through the heat dissipation vent 41. In this case, the system activates active heat source management, appropriately reducing output power to minimize heat generation at the source, effectively avoiding the risk of overheating shutdown due to a sealed nacelle. Furthermore, after reducing output power, the system continuously monitors the temperature difference between the ambient and nacelle. If the temperature difference is determined to be less than a second preset temperature difference, the wind turbine's output power is restored to the preset power, ensuring safe operation of the equipment without affecting the wind turbine's normal power generation capacity.

[0049] For example, in a certain operating scenario, the first preset temperature difference is set to 8℃, and the second preset temperature difference is set to 5℃. A wind turbine is operating at full power in the afternoon during summer. The ambient temperature is 36℃, and the temperature inside the nacelle rises to 45℃ due to high load. At this time, the temperature difference between the inside and outside of the nacelle reaches 9℃, exceeding the first preset temperature difference. Furthermore, the rainfall detection mechanism 3 detects rainfall, and the judgment unit 61 determines that the conditions for opening the heat dissipation vent 41 are not met, and the heat dissipation vent 41 cannot be opened. With continuous heat accumulation inside the nacelle posing an overheating risk, the control unit 62 immediately sends a control command to the drive mechanism 5 to actively reduce the output power of the wind turbine, for example, from 100% to 85%, to reduce the heat generated by heat source components such as the gearbox and generator, thereby suppressing further temperature rise inside the nacelle and preventing the high-temperature protection shutdown. Subsequently, as the rainfall stops and the ambient temperature drops slightly, the temperature inside the nacelle gradually falls back to 39℃, while the ambient temperature is 35℃. At this time, the temperature difference between the inside and outside of the nacelle is 4℃, which is lower than the second preset temperature difference. Based on this, the judgment unit 61 determines that the current heat load is low and the heat dissipation demand is reduced. The control unit 62 then sends a control command to the drive mechanism 5 to adjust the output power of the wind turbine to a preset power to maintain stable power generation.

[0050] The aforementioned control logic integrates multiple criteria, including full-power operation, temperature difference between the inside and outside of the nacelle, and rainfall conditions. In situations where external cooling is unavailable, such as when rainfall closes the vents, the system proactively adjusts the wind turbine's output power, shifting from passive cooling to active heat source management. In extreme scenarios involving high temperature, high load, and rainfall, the system appropriately reduces output power to minimize heat generation at the source, effectively avoiding the risk of overheating shutdown due to a sealed nacelle. Conversely, when the temperature difference between the inside and outside of the nacelle decreases to a lower level, the power is promptly adjusted to the preset level, ensuring safe equipment operation without affecting the wind turbine's normal power generation capacity.

[0051] refer to Figure 1 As shown, in some embodiments, the heat dissipation mechanism 4 further includes an insect-proof net 43 covering the heat dissipation vent 41.

[0052] In some embodiments, the insect screen 43 is installed on the inside or outside of the heat dissipation vent 41 as a physical barrier, covering the entire ventilation area of ​​the heat dissipation vent 41. When the heat dissipation vent 41 is open, it allows air to circulate but blocks the entry of external foreign objects, thereby reducing the risk of electrical failure caused by foreign object intrusion.

[0053] In some embodiments, the heat dissipation vent 41 is disposed on the top, bottom or side of the nacelle cover 21 to adapt to different wind directions, heat flow paths and installation space requirements, and to optimize the air convection effect inside the nacelle.

[0054] Further, refer to Figures 3 to 12The opening method of the heat dissipation vent 41 can include a single-door structure or a double-door structure. The single-door structure consists of a door panel that can rotate around an axis and is driven by an actuator to open or close. The double-door structure consists of two symmetrically arranged door panels that can operate synchronously or independently. It is suitable for larger heat dissipation vents and helps to improve the smoothness of opening and closing and the reliability of sealing.

[0055] The following sections will introduce the structure and motion of execution unit 42 in turn. Figures 3 to 12 The diagram shows seven ways the heat dissipation vents 41 can be opened. The main shaft 30 of the wind turbine is typically connected to the hub located at the head of the wind turbine via bolts or pins; therefore, the location of the main shaft 30 can be considered as the head of the wind turbine.

[0056] Method 1: Reference Figures 3 to 4 A rectangular heat dissipation vent 41 is located on the top of the nacelle cover 21, with its opening facing the head of the wind turbine (i.e., the windward side). An actuator 42 is installed on one edge of the heat dissipation vent 41 to drive the door panel to rotate upward around a fixed axis and open, thereby forming a natural ventilation channel. This structure makes full use of the physical property of hot air rising, achieving efficient heat dissipation through the "chimney effect".

[0057] in, Figure 3 The heat dissipation vent 41 shown has a smaller area, which, while meeting basic heat dissipation requirements, provides superior sealing and protection, making it suitable for operating environments with high dust and water resistance requirements; while Figure 4 The heat dissipation vent 41 shown has a large area, which can significantly enhance air circulation and provide a stronger heat dissipation effect under extreme high temperature conditions, making it suitable for high heat load scenarios.

[0058] Method 2: Reference Figures 5 to 6 The heat dissipation vent 41 is located on one side wall of the nacelle cover 21. It is rectangular with its opening facing downwards and opens by flipping upwards around a fixed axis. This design helps prevent rainwater and dust from entering and provides good protection.

[0059] Specifically, Figure 5 The heat dissipation vent 41 shown has a small area, which can provide higher rain and dust protection capabilities and is suitable for occasions with high requirements for environmental sealing. Figure 6 The heat dissipation vent 41 shown has a large area, which can significantly improve airflow and enhance heat dissipation, making it suitable for operating environments that require efficient heat dissipation.

[0060] Method 3: Reference Figure 7The heat dissipation vent 41 is located on the side of the nacelle cover 21 near the main shaft 30. It is rectangular in shape, with its opening facing the tail of the wind turbine. It opens by flipping around the head of the wind turbine along its fixed axis. This arrangement effectively introduces incoming cold air to directly cool the main shaft, gearbox, and other concentrated heat sources at the front. Simultaneously, with the vent on the leeward side after opening, it significantly reduces the risk of rainwater backflow and dust intrusion, providing superior sealing and protection. It is suitable for scenarios requiring enhanced front-end cooling under high-temperature and high-load conditions, and is particularly suitable for operating environments with heavy rain, strong winds, sandstorms, or stable prevailing winds.

[0061] Method 4: Reference Figure 8 The heat dissipation vent 41 is located on the side of the nacelle cover 21, away from the main shaft 30. It is rectangular in shape, with its opening facing the head of the wind turbine. It opens by flipping around the tail of the wind turbine along its fixed axis. This design facilitates the expulsion of hot air accumulated at the tail of the nacelle, enhancing natural convection and the "chimney effect." Furthermore, the vent's opening direction aligns with the prevailing wind direction, resulting in low wind resistance, low vibration, and light load on the actuators. Simultaneously, it avoids placing moving parts in the main shaft area, improving the usability of the front-end maintenance space. It is suitable for applications that rely on natural cooling, have low wind speeds, or require high convenience for front-end maintenance.

[0062] Method 5: Reference Figure 9 The heat dissipation vent 41 is located on the side of the nacelle cover 21 and has a double-door structure. The opening method is that both door panels flip outwards at the same time, forming a through ventilation path, improving air circulation efficiency, and is suitable for high-power units.

[0063] Method Six: Reference Figures 10 to 11 As shown, the heat dissipation vent 41 is located at the rear of the nacelle cover 21 and is a vertically elongated strip; it is a single-door structure with a relatively small overall opening area. This design is compact, has good sealing performance, requires little driving force to open, and has a light load on the actuator. The small opening also effectively reduces the risk of rainwater and dust intrusion, making it suitable for operating conditions with high protection requirements or those requiring only auxiliary heat dissipation. It is especially suitable for operating environments with heavy rain, high humidity, or strong winds and sandstorms.

[0064] Method 7: Reference Figure 12 As shown, the heat dissipation vent 41 is located at the rear of the nacelle cover 21 and features a double-door structure with a significantly increased opening area. The symmetrical opening of the two doors creates a wider ventilation channel, greatly improving airflow and allowing for more efficient removal of accumulated hot air under high-temperature, full-load conditions, thus enhancing natural convection. This method is suitable for scenarios with extreme high temperatures, urgent heat dissipation needs, and relatively controllable environmental conditions, such as arid or low-rainfall inland areas.

[0065] The wind turbine cooling system provided in this disclosure, by setting controllable opening and closing heat dissipation vents on the nacelle cover and combining multi-parameter sensing and coordinated control of nacelle temperature, ambient temperature, rainfall status, and wind turbine operating status, dynamically introduces external cold air for convective heat exchange while ensuring safe equipment operation. This effectively reduces the internal temperature of the nacelle under extreme high-temperature full-load conditions, alleviates heat accumulation problems, avoids unnecessary power limitations or shutdowns, and achieves a dual improvement in power generation performance and system reliability. Under high-load and high-temperature conditions, the system flexibly selects a cooling strategy based on rainfall status: when there is no rainfall, the heat dissipation vents are opened to introduce external air for natural convection cooling; simultaneously, the temperature difference between the inside and outside of the nacelle and the weather status are continuously monitored during the cooling process. Once the temperature difference decreases to a low level or rainfall is detected, the heat dissipation vents are immediately closed, preventing the risk of dust intrusion and rainwater leakage caused by ineffective ventilation, and avoiding frequent start-stop of the actuators near the critical point, thus improving system stability. When rainfall is detected and there is a risk of overheating inside the nacelle, the system, which requires the vents to remain closed to ensure nacelle airtightness, reduces the output power of the wind turbine to decrease heat generation from the gearbox, generator, and other heat-generating components. This effectively avoids temperature runaway and protective shutdowns caused by a sealed nacelle. Furthermore, during heat dissipation or reduced power operation, if the temperature difference between the inside and outside of the nacelle is detected to have decreased to a low level, the system will promptly adjust the output power to the preset safe operating power. This maintains the wind turbine's normal power generation capacity while ensuring long-term equipment reliability, balancing energy efficiency and safety.

[0066] According to some embodiments of this disclosure, another aspect of this disclosure also provides a heat dissipation method for a wind turbine, applied to the heat dissipation system of the wind turbine in the above embodiments, wherein the wind turbine includes a nacelle.

[0067] refer to Figure 13 As shown in the embodiments of this disclosure, the heat dissipation method for a wind turbine generator includes at least the following steps: S1: Acquire the operating status of the wind turbine, the ambient temperature outside the nacelle, the internal temperature of the nacelle, and the rainfall status outside the nacelle.

[0068] S2: Based on operating status, ambient temperature, cabin temperature and rainfall, control the opening or closing of the heat dissipation vents on the nacelle cover, and / or adjust the output power of the wind turbine.

[0069] refer to Figure 14 As shown, in some embodiments, step S2, based on the operating status, ambient temperature, cabin temperature, and rainfall status, controls the opening or closing of the heat dissipation vents located on the cabin canopy, and includes at least the following steps: S211: Determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with the preset temperature difference, and determine whether it is raining.

[0070] S212: If the wind turbine is operating at full power, and the temperature difference between the cabin and the ambient temperature is greater than or equal to the first preset temperature difference, and there is no rainfall, then the heat dissipation vents will be opened.

[0071] In some embodiments, after step S212, the heat dissipation method further includes the following steps: S213: Compare the difference between the ambient temperature and the cabin temperature with the second preset temperature difference.

[0072] S214: If the wind turbine is operating at full power and the temperature difference between the cabin and the ambient temperature is less than the second preset temperature difference or there is rainfall, then close the heat dissipation vent; wherein the second preset temperature difference is less than the first preset temperature difference.

[0073] refer to Figure 15 As shown, in some embodiments, step S2, which adjusts the output power of the wind turbine based on the operating status, ambient temperature, cabin temperature, and rainfall status, includes at least the following steps: S221: Determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with the first preset temperature difference, and determine whether it is raining.

[0074] S222: If the wind turbine is operating at full power and the temperature difference between the cabin and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall, then reduce the output power of the wind turbine.

[0075] In some embodiments, after step S222, the heat dissipation method further includes the following steps: S223: Compare the difference between the ambient temperature and the cabin temperature with the second preset temperature difference.

[0076] S224: When the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference, the current speed of the wind turbine is adjusted to the preset power.

[0077] The following is combined Figure 16 The specific application process of the heat dissipation method for wind turbines provided in the embodiments of this disclosure in the heat dissipation system of wind turbines is described below: S11: The wind turbine operates according to the set logic.

[0078] S12: Determine if the wind turbine is operating at full power; if so, execute S13.

[0079] S13: Determine whether the temperature detected by the first temperature detection mechanism has reached x℃; if so, execute S14.

[0080] Where x is the ambient temperature.

[0081] S14: Determine whether the temperature detected by the second temperature detection mechanism has reached (x+z)℃; if so, execute S15.

[0082] Where z is the first preset temperature difference.

[0083] S15: Determine whether the rainfall detection mechanism has detected rain outside the cabin; if not, proceed to S16; if yes, proceed to S19.

[0084] S16: The control unit sends an opening command to the heat dissipation mechanism, and controls the execution unit to open the heat dissipation vents on the engine compartment cover.

[0085] S171: Determine whether the rainfall detection mechanism has detected rain outside the cabin; if so, proceed to S18.

[0086] S172: While executing S171, monitor whether the temperature detected by the second temperature detection mechanism is less than (x+y)℃; if so, execute S18.

[0087] Where y is the second preset temperature difference.

[0088] S18: The control unit sends a control command to the heat dissipation mechanism to control the execution unit to close the heat dissipation port; then returns to S11 and continues to monitor in a loop.

[0089] S19: The control unit sends a power reduction command to the drive mechanism, causing the wind turbine to operate at a reduced output power.

[0090] S20: Determine whether the temperature detected by the second temperature detection mechanism is less than (x + y)℃; if so, return to execute S11.

[0091] The wind turbine heat dissipation method provided in this disclosure acquires multi-dimensional parameters such as nacelle temperature, ambient temperature, rainfall status, and wind turbine operating status. Based on these parameters, it dynamically executes the opening or closing of heat dissipation vents and / or adjusts the output power of the wind turbine. This achieves precise control of the nacelle's thermal environment while ensuring safe equipment operation. Under extreme high-temperature and full-power operating conditions, this method can promptly introduce external cold air for convective heat exchange, effectively reducing the nacelle temperature, alleviating heat accumulation, and preventing unnecessary power limitations or shutdowns due to overheating. This balances power generation performance and system reliability. Specifically, under high load and high temperature conditions, if there is no rainfall, the heat dissipation vents are opened for natural convection cooling. Simultaneously, the temperature difference between the inside and outside of the nacelle and the rainfall status are continuously monitored during the cooling process. Once the temperature difference narrows to a low level or rainfall is detected, the heat dissipation vents are immediately closed. This prevents dust intrusion and rainwater leakage risks caused by ineffective ventilation, and also avoids frequent start-stop cycles of the actuators near the critical point through a temperature difference hysteresis mechanism. If rainfall is detected and there is a risk of overheating, the output power of the wind turbine is reduced, reducing the heat generation of heat source components at the source and effectively avoiding temperature runaway and protective shutdown caused by the sealed nacelle. Furthermore, during cooling or reduced power operation, when the temperature difference between the inside and outside of the nacelle drops to a low level, this method can also promptly adjust the output power to the preset safe operating power, maintaining normal power generation capacity while ensuring the long-term reliability of the equipment, achieving a balance between energy efficiency and safety.

[0092] According to some embodiments of this disclosure, another aspect of this disclosure also provides a wind turbine generator, see reference. Figure 17 As shown, the wind turbine generator 100 includes the heat dissipation system 10 of the wind turbine generator in the above embodiment. For parts that are the same as or corresponding to those in the previous embodiment, please refer to the corresponding descriptions in the foregoing embodiments; detailed descriptions will not be repeated below.

[0093] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this disclosure. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this disclosure; therefore, the scope of protection of this disclosure should be determined by the scope defined in the claims.

Claims

1. A heat dissipation system for a wind turbine generator, characterized in that, The wind turbine includes a nacelle, and the cooling system includes: The first temperature detection mechanism is located outside the cabin and is configured to acquire the ambient temperature; A second temperature detection mechanism is installed inside the cabin and configured to acquire the cabin temperature. A rainfall detection device, located outside the cabin, is configured to detect rainfall conditions; The heat dissipation mechanism includes a heat dissipation vent disposed on the nacelle cover of the engine room and an execution unit for controlling the opening and closing of the heat dissipation vent; A drive mechanism, located within the nacelle, is configured to drive the wind turbine generator. A control module, located within the nacelle, is electrically connected to the first temperature detection mechanism, the second temperature detection mechanism, the rainfall detection mechanism, the heat dissipation mechanism, and the drive mechanism, respectively. The control module is configured to receive the operating status of the wind turbine, the ambient temperature, the nacelle temperature, and the rainfall status, and send control commands to the heat dissipation mechanism and the drive mechanism to control the execution unit to open or close the heat dissipation vents, and / or control the drive mechanism to adjust the output power of the wind turbine.

2. The heat dissipation system for a wind turbine generator according to claim 1, characterized in that, The control module includes: The judgment unit is configured to determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and determine whether it is raining. The control unit is configured to send a control command to the heat dissipation mechanism to control the execution unit to open the heat dissipation vent if the wind turbine is operating at full power, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is no rainfall.

3. The heat dissipation system for a wind turbine generator according to claim 2, characterized in that, The judgment unit is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; The control unit is further configured to send a control command to the heat dissipation mechanism to control the execution unit to close the heat dissipation vent if the wind turbine is operating at full power and the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference or if there is rainfall; wherein the second preset temperature difference is less than the first preset temperature difference.

4. The heat dissipation system for a wind turbine generator according to claim 1, characterized in that, The control module includes: The judgment unit is configured to determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and determine whether it is raining. The control unit is configured to send a control command to the drive mechanism to control the drive mechanism to reduce the output power of the wind turbine if the wind turbine is operating at full power, the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall.

5. The heat dissipation system for a wind turbine generator according to claim 4, characterized in that, The judgment unit is further configured to compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; The control unit is further configured to send a control command to the drive mechanism when the difference between the cabin temperature and the ambient temperature is less than a second preset temperature difference, so as to control the drive mechanism to adjust the output power of the wind turbine to a preset power.

6. The heat dissipation system for a wind turbine generator according to claim 1, characterized in that, The heat dissipation mechanism also includes an insect-proof net covering the heat dissipation vent.

7. The heat dissipation system for a wind turbine generator according to claim 1, characterized in that, The heat dissipation vents are located on the top, bottom, or side of the nacelle cover.

8. A method for heat dissipation of a wind turbine, characterized in that, A cooling system for a wind turbine generator according to any one of claims 1 to 7, the wind turbine generator including a nacelle, the cooling method for the wind turbine generator comprising: The system acquires the operating status of the wind turbine, the ambient temperature outside the nacelle, the internal temperature inside the nacelle, and the rainfall status outside the nacelle. Based on the operating status, the ambient temperature, the cabin temperature, and the rainfall status, the opening or closing of the heat dissipation vents on the nacelle cover is controlled, and / or the output power of the wind turbine is adjusted.

9. A method for heat dissipation of a wind turbine generator according to claim 8, characterized in that, The method of controlling the opening or closing of the heat dissipation vents located on the nacelle canopy based on the operating status, the ambient temperature, the cabin temperature, and the rainfall status includes: Determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a preset temperature difference, and determine whether it is raining; If the wind turbine is operating at full power, and the temperature difference between the cabin and the ambient temperature is greater than or equal to a first preset temperature difference, and there is no rainfall, then the heat dissipation vent will be opened.

10. A method for heat dissipation of a wind turbine generator according to claim 9, characterized in that, The heat dissipation method further includes: Compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; If the wind turbine is operating at full power, and the temperature difference between the cabin and the ambient temperature is less than the second preset temperature difference or there is rainfall, then the heat dissipation vent is closed; wherein the second preset temperature difference is less than the first preset temperature difference.

11. A method for heat dissipation of a wind turbine generator according to claim 8, characterized in that, The method of adjusting the output power of the wind turbine based on the operating status, the ambient temperature, the cabin temperature, and the rainfall status includes: Determine whether the wind turbine is operating at full power, compare the difference between the ambient temperature and the cabin temperature with a first preset temperature difference, and determine whether it is raining; If the wind turbine is operating at full power, and the difference between the cabin temperature and the ambient temperature is greater than or equal to the first preset temperature difference, and there is rainfall, then the output power of the wind turbine is reduced.

12. A method for heat dissipation of a wind turbine generator according to claim 11, characterized in that, The heat dissipation method further includes: Compare the difference between the ambient temperature and the cabin temperature with a second preset temperature difference; When the difference between the cabin temperature and the ambient temperature is less than the second preset temperature difference, the current speed of the wind turbine is adjusted to the preset power.

13. A wind turbine generator, characterized in that, The cooling system of the wind turbine as described in any one of claims 1 to 7.

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