Cooling system and method for wind power generation equipment unit

Abstract

The invention relates to a wind power generation equipment unit cooling system which is used for cooling a hub and comprises an equipment temperature monitoring unit, a hub internal temperature monitoring unit, a temperature analysis unit, a liquid cooling control unit, liquid cooling equipment, an air cooling control unit and a heat conduction pipe. The temperature analysis unit analyzes and judges the received temperature data in real time, and when the equipment temperature or the environment temperature in the hub exceeds a set threshold value, a corresponding cooling control strategy is started. If the temperature of the equipment is too high, the liquid cooling control unit is started preferentially, and the working state of the liquid cooling equipment is adjusted; and if the overall temperature in the hub rises fast, rapid cooling cannot be achieved only through heat dissipation of the rotating side wall of the hub, at the moment, the air cooling control unit is started at the same time, opening and closing of the heat conduction pipe are controlled, and heat dissipation is conducted. The invention further relates to a wind power generation equipment unit cooling method. By means of the method and system, the equipment temperature and the environment temperature can be accurately mastered, the temperature analysis unit makes accurate judgment according to real-time data, accurate control over the cooling system is achieved, and excessive cooling or insufficient cooling is avoided.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of wind power generation system control, and in particular relates to a wind power generation equipment unit cooling system and method. Background Art

[0002] As a clean energy source, wind power plays an increasingly important role in the global energy mix. However, wind turbines generate significant heat during operation. Failure to effectively cool this heat can impact equipment performance and lifespan, ultimately reducing power generation efficiency. Therefore, technological innovation in wind turbine cooling systems is crucial. This patent focuses on a wind turbine unit cooling system designed to address the cooling issues within the hub and the surrounding environment, ensuring stable and efficient operation of wind turbine systems. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a wind power equipment cooling system to solve the above problems, characterized in that the system is used to cool the hub, and includes an equipment temperature monitoring unit, a hub internal temperature monitoring unit, a temperature analysis unit, a liquid cooling control unit, a liquid cooling device, an air cooling control unit, and a heat pipe; The temperature monitoring unit is provided on each device in the hub or inside the device, is connected to the temperature analysis unit, and is used to detect the operating temperature of the device in real time and send the device temperature information to the temperature analysis unit; The wheel hub internal temperature monitoring unit is arranged inside the wheel hub and away from various internal devices, and is connected to the temperature analysis unit, and is used to detect the ambient temperature inside the wheel hub in real time and send the ambient temperature information to the temperature analysis unit; The liquid cooling control unit is arranged inside the wheel hub, connected to the temperature analysis unit and the liquid cooling device, and is used to control the switch of the liquid cooling device and the cold water flow of the cold water circulation of the liquid cooling device according to the liquid cooling control signal of the temperature analysis unit; The air cooling control unit is arranged inside the wheel hub, connected to the temperature analysis unit and the heat conducting pipe, and is used to control the opening and closing of the heat conducting pipe according to the air cooling control signal of the temperature analysis unit; The temperature analysis unit receives temperature information from the device temperature monitoring unit and the wheel hub temperature monitoring unit, performs comprehensive analysis and processing, activates corresponding cooling control strategies based on the analysis results, and generates corresponding control signals.

[0004] Optionally, the various equipment in the wheel hub include generators, transmissions, and other auxiliary equipment; the liquid cooling equipment is mainly composed of a water tank, a circulation pump, a plate heat exchanger, and connecting pipes; the heat pipe is one or more, and partially extends out of the wheel hub and is sealed at the connection with the side wall.

[0005] Optionally, the temperature analysis unit specifically analyzes the following: after receiving the temperature data from the device temperature monitoring unit, comparing it with a preset device temperature threshold; if it is higher than the threshold, generating a liquid cooling control signal; after receiving the temperature data from the temperature monitoring unit inside the wheel hub, comparing it with a preset wheel hub ambient temperature threshold; if it is higher than the threshold, generating an air cooling control signal at the same time; transmitting the control signals to the liquid cooling control unit and the air cooling control unit respectively through control cables.

[0006] Optionally, the specific installation method of the temperature monitoring unit and the temperature monitoring unit in the wheel hub is: install the equipment temperature monitoring unit on or inside each key equipment in the wheel hub to ensure that the sensor is in full contact with the surface of the equipment; install the temperature monitoring unit in the wheel hub at a suitable position in the cabin, away from interference from heating equipment, and connect ordinary cables to the temperature analysis unit.

[0007] Optionally, after the temperature analysis unit transmits the control signal to the liquid cooling control unit and the air cooling control unit respectively through the control cable, it also includes: if the temperature of the equipment is too high, the liquid cooling control unit is started first to adjust the working state of the liquid cooling equipment, that is, the cold water flow is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger; if the overall temperature inside the hub rises rapidly, the heat dissipation only through the rotating side wall of the hub cannot quickly cool down, at this time, the air cooling control unit is started at the same time to control the opening and closing of the heat pipe to dissipate heat.

[0008] Optionally, the liquid cooling control signal sent includes a control signal for adjusting the cold water flow Qw and a heat exchange efficiency kw value. The Qw value can be calculated according to the formula Qw=kw(Td-Ta), where kw is the heat exchange efficiency, Td is the device temperature, and Ta is the device temperature threshold.

[0009] Optionally, the opening and closing of the heat pipe is controlled specifically as follows: if the ambient temperature Te inside the wheel hub is higher than the ambient temperature threshold Tb, and the rising speed Qt of Te is relatively fast, the air cooling control unit is started and an air cooling control signal is sent at the same time, where Qt is calculated according to the formula Qt=(Te'-Te) / △t, where △t is the time interval between two consecutive ambient temperature collections inside the wheel hub, and Te' is the time for the next ambient temperature collection inside the wheel hub.

[0010] The present invention also provides a method for cooling a wind power generation equipment unit, the method specifically comprising the steps of: (1) Collect temperature data in real time and transmit it to the temperature analysis unit; Specifically: The device temperature can be accurately obtained by measuring the resistance value, that is, the device temperature T can be obtained by the formula R=R1(1+aT); In addition, when the temperatures at both ends are different, a thermoelectric potential E will be generated. The relationship between the thermoelectric potential E and the temperature difference △T is E=k△T (k is the thermoelectric potential rate of the thermocouple). The ambient temperature T inside the wheel hub can be obtained through the above formula; (2) Analyze and judge the temperature data in real time. When the equipment temperature or the ambient temperature inside the hub exceeds the set threshold, start the corresponding cooling control strategy and generate a corresponding control signal; the control signal includes a liquid cooling control signal and an air cooling control signal; Specifically: If the device temperature is too high, the liquid cooling control unit is activated first to adjust the working state of the liquid cooling device. That is, the cold water flow is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger. If the overall temperature inside the hub rises rapidly, heat dissipation through the rotating side walls of the hub alone cannot quickly cool it down. At this time, the air cooling control unit is also activated to control the opening and closing of the heat pipes to dissipate heat. (3) According to the liquid cooling control signal and the air cooling control signal, the liquid cooling device and the heat pipe are controlled respectively; that is, when only the temperature of the device in the hub is too high, only liquid cooling is completed; when the ambient temperature in the hub is too high, both liquid cooling and air cooling are completed; Specifically: Based on the liquid cooling control signal, the cold water flow Qw value is extracted. Then, the cold water (coolant) flow is controlled according to parameters such as signal strength or frequency; Based on the air cooling control signal, the opening and closing angles of the blades are adjusted according to the specific requirements of the signal.

[0011] The beneficial effect of the present disclosure is that the method and system of the present application can accurately grasp the equipment and environmental temperatures through the coordinated work of the equipment temperature monitoring unit and the temperature monitoring unit in the wheel hub. The temperature analysis unit makes accurate judgments based on real-time data to achieve precise control of the cooling system and avoid overcooling or insufficient cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of a wind power generation equipment unit cooling system disclosed herein; Figure 2 The present invention is a flow chart of a method for cooling a wind power generation equipment unit. DETAILED DESCRIPTION

[0013] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0014] like Figure 1As shown, a wind power generation equipment unit cooling system is used to cool the hub, including an equipment temperature monitoring unit, a hub internal temperature monitoring unit, a temperature analysis unit, a liquid cooling control unit, a liquid cooling device, an air cooling control unit, and a heat pipe.

[0015] The temperature monitoring unit is installed on or within each device within the wheel hub and is connected to the temperature analysis unit. It detects the operating temperature of the device in real time and transmits this information to the temperature analysis unit. The devices within the wheel hub include the generator, transmission, and other auxiliary equipment. This system primarily targets key equipment such as the generator and transmission.

[0016] The hub temperature monitoring unit is located inside the hub, away from the various internal devices, and is connected to the temperature analysis unit. It detects the ambient temperature inside the hub in real time and transmits this information to the temperature analysis unit. If the temperature of key devices inside the hub rises too quickly or if heat dissipation is not timely, the hub temperature will be too high, causing abnormalities in the overall wind turbine system and reducing power generation efficiency.

[0017] The liquid cooling control unit is arranged inside the wheel hub, connecting the temperature analysis unit and the liquid cooling device, and is used to control the switch of the liquid cooling device and the cold water flow of the cold water circulation of the liquid cooling device according to the liquid cooling control signal of the temperature analysis unit.

[0018] The liquid cooling equipment is mainly composed of a water tank, a circulation pump, a plate heat exchanger and connecting pipes. The water tank is used to store the coolant, the circulation pump provides the coolant circulation power, and the plate heat exchanger realizes the heat exchange. The air cooling control unit is arranged inside the wheel hub, connected to the temperature analysis unit and the heat conduction pipe, and is used to control the opening and closing of the heat conduction pipe according to the air cooling control signal of the temperature analysis unit.

[0019] The heat pipe is one or more and partially extends out of the hub and is sealed at the connection with the side wall to dissipate heat by dissipating the internal heat.

[0020] The temperature analysis unit is connected to the device temperature monitoring unit and the wheel hub temperature monitoring unit, and is also connected to the liquid cooling control unit and the air cooling control unit. As the control core of the system, the temperature analysis unit receives temperature information from the device temperature monitoring unit and the wheel hub temperature monitoring unit, and performs comprehensive analysis and processing. It contains a microprocessor and a memory that stores preset temperature thresholds and control strategies. After receiving the temperature data from the device temperature monitoring unit, it is compared with the preset device temperature threshold. If it is higher than the threshold, a liquid cooling control signal is generated; after receiving the temperature data from the wheel hub temperature monitoring unit, it is compared with the preset wheel hub ambient temperature threshold. If it is higher than the threshold, an air cooling control signal is generated at the same time. These control signals are transmitted to the liquid cooling control unit and the air cooling control unit respectively through control cables.

[0021] The installation structure of the wind power equipment unit cooling system in this application is as follows: Install equipment temperature monitoring units on or inside each key device in the hub, ensuring that the sensor is in full contact with the device surface to accurately measure the temperature, and properly lay high-temperature resistant shielded cables to connect to the temperature analysis unit. Install the in-hub temperature monitoring unit in a suitable location in the cabin, away from interference from heat-generating equipment, and connect ordinary cables to the temperature analysis unit. Install the liquid cooling equipment, including a fixed water tank, pipes connecting the circulation pump and plate heat exchanger, ensuring there are no leaks, and then connect the liquid cooling control unit to the temperature analysis unit and liquid cooling equipment. Install the air-cooled control unit and heat pipe, and properly connect them through mechanical linkages and electrical control lines to ensure that the opening and closing of the heat pipe accurately responds to the control signal. Debug the entire system, calibrate the temperature sensor, and set the threshold and control strategy of the temperature analysis unit.

[0022] The interaction and processing of each unit in the system are as follows: (1) When the system is operating normally, the equipment temperature monitoring unit and the hub temperature monitoring unit collect temperature data in real time and transmit it to the temperature analysis unit.

[0023] Specifically: The temperature monitoring unit uses a high-precision thermistor as a temperature sensor. Its resistance changes with temperature, and measuring this resistance accurately determines the device temperature. Assuming the thermistor's resistance at device temperature T is R, its relationship to temperature can be approximately expressed as R = R1(1 + aT), where R1 is the resistance at 0°C and a is the temperature coefficient. This formula can be used to determine the device temperature, T.

[0024] The temperature monitoring unit inside the wheel hub can use a thermocouple thermometer. Its principle is based on the thermoelectric effect. That is, in a loop composed of two different metal wires, when the temperatures at both ends are different, a thermoelectric potential E will be generated. The relationship between the thermoelectric potential E and the temperature difference △T is E=k△T (k is the thermoelectric potential rate of the thermocouple). The ambient temperature T inside the wheel hub can be obtained through the above formula.

[0025] For example, suppose the resistance value of a certain type of thermistor at 0°C is R1=100Ω and the temperature coefficient a=0.004. When the measured resistance value R=120Ω, according to the formula 120=100(1+0.004*T), the device temperature T=50°C.

[0026] Assuming that the thermoelectric potential rate of a thermocouple is k=0.05, when the thermoelectric potential E=2mV is measured, according to the formula 2=0.05△T, if the reference end temperature is 0℃, the ambient temperature inside the wheel hub is T=40℃.

[0027] (2) The temperature analysis unit performs real-time analysis and judgment on the received temperature data. When the device temperature or the ambient temperature inside the hub exceeds the set threshold, the corresponding cooling control strategy is activated and a corresponding control signal is generated. The control signal includes a liquid cooling control signal and an air cooling control signal.

[0028] Specifically: Typically, the temperature of the internal devices in the hub rises first. When the temperature of one or more devices reaches a certain level and internal heat dissipation becomes abnormal, the ambient temperature inside the hub begins to rise. Therefore, in principle, it is necessary to control the device temperature first, and then adjust the ambient temperature inside the hub.

[0029] The temperature analysis unit analyzes the data once every (for example, seconds). If the device temperature is too high, the liquid cooling control unit is activated first to adjust the working state of the liquid cooling device, that is, by controlling the speed of the circulation pump and the flow of the plate heat exchanger, the flow of cold water is adjusted; if the overall temperature inside the hub rises rapidly, heat dissipation through the rotating side walls of the hub alone cannot quickly cool it down. At this time, the air cooling control unit is activated at the same time to control the opening and closing of the heat pipe to dissipate heat.

[0030] During the entire process, information is continuously exchanged between the various units to form a closed-loop control system to ensure that the temperature inside the wheel hub is always within the appropriate range.

[0031] Among them, the working state of the liquid cooling equipment is adjusted, that is, the flow of cold water is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger. The specific process is: If the device temperature Td exceeds the device temperature threshold Ta, a liquid cooling control signal is sent to activate the liquid cooling device. This includes a control signal for adjusting the cold water flow rate Qw and a heat exchange efficiency kw value. Qw is calculated using the formula Qw = kw(Td - Ta) (kw represents the heat exchange efficiency). The heat exchange efficiency kw is obtained from the temperature monitoring unit and calculated using Kw = Qa / Qmax, where Qa represents the actual heat exchange rate and Qmax represents the maximum heat exchange rate. Based on the calculated cold water flow rate Qw, a liquid cooling control signal is generated and sent to the liquid cooling control unit. Simultaneously, device temperature information from the temperature monitoring unit continues to be received.

[0032] For example, if Qa=80 and Qmax=100, then Kw=0.8. When the equipment temperature reaches 90°C, Qw=0.8(90-80)=8m3 / h.

[0033] In addition, the specific process of controlling the opening and closing of the heat pipe is as follows: If the ambient temperature Te inside the wheel hub is higher than the ambient temperature threshold Tb, and the rising rate Qt of Te is relatively fast, that is, the temperature increase per unit time is high, such as 0.1°C / second, the air cooling control unit is started and an air cooling control signal is sent at the same time, including a heat pipe opening control signal. Qt is calculated according to the formula Qt=(Te'-Te) / △t, where △t is the time interval between two consecutive wheel hub ambient temperature collections, and Te' is the time for the next wheel hub ambient temperature collection.

[0034] Then, it is determined whether Qt is higher than a threshold, such as 0.1°C / second. If it is higher than the threshold, that is, the rising speed of Te is relatively fast, the heat pipe is turned on to dissipate heat outward through the rotation of the hub.

[0035] Finally, the ambient temperature information sent by the temperature monitoring unit in the hub is continuously received, and the rising speed Qt of Te is monitored and calculated. When Qt is less than the threshold, an air cooling control signal is issued to close the heat pipe.

[0036] (3) After receiving the control signal from the temperature analysis unit, the liquid cooling control unit and / or the air cooling control unit respectively control the liquid cooling equipment and the heat pipe. That is, when only the temperature of the equipment inside the hub is too high, only liquid cooling is performed; when the ambient temperature inside the hub is too high, both liquid cooling and air cooling are performed simultaneously.

[0037] Specifically, the liquid cooling control unit receives the liquid cooling control signal from the temperature analysis unit and extracts the cold water flow rate Qw. It then activates the circulation pump, causing the coolant to circulate through the pipes. The circulation pump's speed is then adjusted based on parameters such as the signal's strength and frequency, ultimately controlling the cold water (coolant) flow rate.

[0038] For example, if the signal indicates that the equipment temperature is high and the cooling speed needs to be accelerated, the liquid cooling control unit will increase the speed of the circulation pump and increase the flow rate of the coolant in the plate heat exchanger to improve the heat exchange efficiency.

[0039] Upon receiving the air cooling control signal from the temperature analysis unit, the air cooling control unit first drives the mechanical linkage to open and close the outer nozzle of the heat pipe. If the temperature inside the wheel hub is high and more ventilation is needed to dissipate heat, the air cooling control unit will open the outer nozzle of the heat pipe to increase ventilation.

[0040] like Figure 2 As shown, the present application also discloses a method for cooling a wind power generation equipment unit, which specifically includes the following steps: (1) Collect temperature data in real time and transmit it to the temperature analysis unit.

[0041] Specifically: The device temperature can be accurately obtained by measuring the resistance value, that is, the device temperature T can be obtained by the formula R=R1(1+aT).

[0042] In addition, when the temperatures at both ends are different, a thermoelectric potential E will be generated. The relationship between the thermoelectric potential E and the temperature difference △T is E=k△T (k is the thermoelectric potential rate of the thermocouple). The ambient temperature T inside the wheel hub can be obtained through the above formula.

[0043] (2) Perform real-time analysis and judgment on the temperature data. When the device temperature or the ambient temperature inside the hub exceeds the set threshold, the corresponding cooling control strategy is activated and a corresponding control signal is generated. The control signal includes a liquid cooling control signal and an air cooling control signal.

[0044] Specifically: Typically, the temperature of the internal devices in the hub rises first. When the temperature of one or more devices reaches a certain level and internal heat dissipation becomes abnormal, the ambient temperature inside the hub begins to rise. Therefore, in principle, it is necessary to control the device temperature first, and then adjust the ambient temperature inside the hub.

[0045] If the equipment temperature is too high, the liquid cooling control unit is started first to adjust the working state of the liquid cooling equipment, that is, the cold water flow is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger; if the overall temperature inside the hub rises rapidly, the heat dissipation through the rotating side wall of the hub alone cannot quickly cool down the temperature. At this time, the air cooling control unit is started at the same time to control the opening and closing of the heat pipe for heat dissipation.

[0046] Among them, the working state of the liquid cooling equipment is adjusted, that is, the flow of cold water is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger. The specific process is: If the device temperature Td exceeds the device temperature threshold Ta, a liquid cooling control signal is sent to activate the liquid cooling device. This includes a control signal for adjusting the cold water flow rate Qw and a heat exchange efficiency kw value. Qw is calculated using the formula Qw = kw(Td - Ta) (kw represents the heat exchange efficiency). The heat exchange efficiency kw is obtained from the temperature monitoring unit and calculated using Kw = Qa / Qmax, where Qa represents the actual heat exchange rate and Qmax represents the maximum heat exchange rate. Based on the calculated cold water flow rate Qw, a liquid cooling control signal is generated and sent to the liquid cooling control unit. Simultaneously, device temperature information from the temperature monitoring unit continues to be received.

[0047] In addition, the specific process of controlling the opening and closing of the heat pipe is as follows: If the ambient temperature Te inside the wheel hub is higher than the ambient temperature threshold Tb, And the rising speed Qt of Te is relatively fast, that is, the temperature increase per unit time is high, such as 0.1℃ / second, then the air cooling control unit is started, and the air cooling control signal is sent at the same time, including the heat pipe opening control signal, where Qt is calculated according to the formula Qt=(Te'-Te) / △t, where △t is the time interval between two consecutive wheel hub ambient temperature collections, and Te' is the time for the next wheel hub ambient temperature collection.

[0048] Then, it is determined whether Qt is higher than a threshold, such as 0.1°C / second. If it is higher than the threshold, that is, the rising speed of Te is relatively fast, the heat pipe is turned on to dissipate heat outward through the rotation of the hub.

[0049] Finally, the ambient temperature information sent by the temperature monitoring unit in the hub is continuously received, and the rising speed Qt of Te is monitored and calculated. When Qt is less than the threshold, an air cooling control signal is issued to close the heat pipe.

[0050] (3) According to the control signal, the liquid cooling device and the heat pipe are controlled separately. That is, when only the temperature of the device inside the hub is too high, only liquid cooling is performed; when the ambient temperature inside the hub is too high, both liquid cooling and air cooling are performed simultaneously.

[0051] Specifically, based on the liquid cooling control signal, the cold water flow rate Qw value is extracted. Then, the cold water (coolant) flow rate is controlled based on parameters such as the signal strength or frequency.

[0052] Based on the air cooling control signal, the opening and closing of the heat pipe is controlled according to the specific requirements of the signal.

[0053] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present disclosure. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure.

Claims

1. A wind power generation equipment unit cooling system, characterized in that: The system is used to cool the wheel hub, and includes an equipment temperature monitoring unit, a wheel hub internal temperature monitoring unit, a temperature analysis unit, a liquid cooling control unit, a liquid cooling device, an air cooling control unit, and a heat pipe; The temperature monitoring unit is provided on each device in the hub or inside the device, is connected to the temperature analysis unit, and is used to detect the operating temperature of the device in real time and send the device temperature information to the temperature analysis unit; The wheel hub internal temperature monitoring unit is arranged inside the wheel hub and away from various internal devices, and is connected to the temperature analysis unit, and is used to detect the ambient temperature inside the wheel hub in real time and send the ambient temperature information to the temperature analysis unit; The liquid cooling control unit is arranged inside the wheel hub, connected to the temperature analysis unit and the liquid cooling device, and is used to control the switch of the liquid cooling device and the cold water flow of the cold water circulation of the liquid cooling device according to the liquid cooling control signal of the temperature analysis unit; The air cooling control unit is arranged inside the wheel hub, connected to the temperature analysis unit and the heat conducting pipe, and is used to control the opening and closing of the heat conducting pipe according to the air cooling control signal of the temperature analysis unit; The temperature analysis unit receives temperature information from the device temperature monitoring unit and the wheel hub temperature monitoring unit, performs comprehensive analysis and processing, activates corresponding cooling control strategies based on the analysis results, and generates corresponding control signals.

2. The wind power generation equipment unit cooling system according to claim 1, characterized in that: The various devices in the engine hub include generators, transmissions, and other auxiliary equipment; the liquid cooling equipment is mainly composed of a water tank, a circulating pump, a plate heat exchanger, and connecting pipes; the heat pipe is one or more, and partially extends out of the hub and is sealed at the connection with the side wall.

3. The wind power generation equipment unit cooling system according to claim 1, characterized in that: The temperature analysis unit specifically analyzes the following: upon receiving the temperature data from the device temperature monitoring unit, the temperature data is compared with a preset device temperature threshold; if the temperature data is higher than the threshold, a liquid cooling control signal is generated; upon receiving the temperature data from the hub internal temperature monitoring unit, the temperature data is compared with a preset hub internal ambient temperature threshold; if the temperature data is higher than the threshold, an air cooling control signal is generated at the same time; and the control signals are transmitted to the liquid cooling control unit and the air cooling control unit respectively through control cables.

4. The wind power generation equipment unit cooling system according to claim 3, characterized in that: The specific installation method of the temperature monitoring unit and the temperature monitoring unit in the wheel hub is: install the equipment temperature monitoring unit on or inside each key equipment in the wheel hub, ensuring that the sensor is in full contact with the surface of the equipment; install the temperature monitoring unit in the wheel hub at a suitable position in the cabin, away from interference from heating equipment, and connect ordinary cables to the temperature analysis unit.

5. The wind power generation equipment cooling system according to claim 3, characterized in that: After the temperature analysis unit transmits the control signal to the liquid cooling control unit and the air cooling control unit respectively through the control cable, it also includes: if the device temperature is too high, the liquid cooling control unit is started first to adjust the working state of the liquid cooling device, that is, the cold water flow is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger; if the overall temperature inside the hub rises rapidly, the heat dissipation only through the rotating side wall of the hub cannot quickly cool down, at this time, the air cooling control unit is started at the same time to control the opening and closing of the heat pipe to dissipate heat.

6. The wind power generation equipment cooling system according to claim 5, characterized in that: The liquid cooling control signal sent includes the control signal for adjusting the cold water flow Qw and the heat exchange efficiency kw value. The Qw value can be calculated according to the formula Qw=kw(Td-Ta), where kw is the heat exchange efficiency, Td is the device temperature, and Ta is the device temperature threshold.

7. The wind power generation equipment cooling system according to claim 5, characterized in that: The opening and closing of the heat pipe is controlled specifically as follows: if the ambient temperature Te inside the wheel hub is higher than the ambient temperature threshold Tb, and the rising speed Qt of Te is relatively fast, the air cooling control unit is started and an air cooling control signal is sent at the same time, wherein Qt is calculated according to the formula Qt=(Te'-Te) / △t, wherein △t is the time interval between two consecutive wheel hub ambient temperature collections, and Te' is the time for the next wheel hub ambient temperature collection.

8. A method for cooling a wind power generation equipment unit, the method comprising the steps of: (1) Collect temperature data in real time and transmit it to the temperature analysis unit; Specifically: The device temperature can be accurately obtained by measuring the resistance value, that is, the device temperature T can be obtained by the formula R=R1(1+aT); In addition, when the temperatures at both ends are different, a thermoelectric potential E will be generated. The relationship between the thermoelectric potential E and the temperature difference △T is E=k△T (k is the thermoelectric potential rate of the thermocouple). The ambient temperature T inside the wheel hub can be obtained through the above formula; (2) Analyze and judge the temperature data in real time. When the equipment temperature or the ambient temperature inside the hub exceeds the set threshold, start the corresponding cooling control strategy and generate a corresponding control signal; the control signal includes a liquid cooling control signal and an air cooling control signal; Specifically: If the device temperature is too high, the liquid cooling control unit is activated first to adjust the working state of the liquid cooling device. That is, the cold water flow is adjusted by controlling the speed of the circulation pump and the flow of the plate heat exchanger. If the overall temperature inside the hub rises rapidly, heat dissipation through the rotating side walls of the hub alone cannot quickly cool it down. At this time, the air cooling control unit is also activated to control the opening and closing of the heat pipes to dissipate heat. (3) According to the liquid cooling control signal and the air cooling control signal, the liquid cooling device and the heat pipe are controlled respectively; that is, when only the temperature of the device in the hub is too high, only liquid cooling is completed; when the ambient temperature in the hub is too high, both liquid cooling and air cooling are completed; Specifically: Based on the liquid cooling control signal, the cold water flow Qw value is extracted. Then, the cold water (coolant) flow is controlled according to parameters such as signal strength or frequency; Based on the air cooling control signal, the opening and closing angles of the blades are adjusted according to the specific requirements of the signal.

9. The method for cooling a wind power generation equipment unit according to claim 8, characterized in that: The liquid cooling control signal sent includes the control signal for adjusting the cold water flow Qw and the heat exchange efficiency kw value. The Qw value can be calculated according to the formula Qw=kw(Td-Ta), where kw is the heat exchange efficiency, Td is the device temperature, and Ta is the device temperature threshold.

10. The method for cooling a wind power generation equipment unit according to claim 8, characterized in that: The opening and closing of the heat pipe is controlled specifically as follows: if the ambient temperature Te inside the wheel hub is higher than the ambient temperature threshold Tb, and the rising speed Qt of Te is relatively fast, the air cooling control unit is started and an air cooling control signal is sent at the same time, wherein Qt is calculated according to the formula Qt=(Te'-Te) / △t, wherein △t is the time interval between two consecutive wheel hub ambient temperature collections, and Te' is the time for the next wheel hub ambient temperature collection.

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