Heat dissipation system for wind power generation transformer

Abstract

The utility model provides a kind of heat dissipation system of transformer for wind power generation, comprising: shell, centrifugal fan, internal cooler and controller, shell is arranged on the outer wall of the box body with built-in transformer, shell and the outer wall of box body enclose flow space;Centrifugal fan is arranged in flow space, and the air inlet of centrifugal fan is connected with the exhaust port of box body;The air outlet of centrifugal fan is located in flow space;Centrifugal fan is used to suck hot air in box body and import into flow space;Internal cooler is arranged in flow space, and internal cooler is below centrifugal fan, and internal cooler has relatively arranged air inlet end and air outlet end, air inlet end is communicated with flow space, and air outlet end is communicated with the air inlet of box body.The heat dissipation system of transformer for wind power generation effectively solves the technical problem that transformer integrated in the internal tower cylinder of wind power generation tower in prior art cannot effectively dissipate heat.

Description

Technical Field

[0001] This utility model relates to the technical field of power generation towers, and specifically to a heat dissipation system for a transformer used in wind power generation. Background Technology

[0002] To improve system efficiency and reduce construction and operation costs, wind power technology is constantly evolving. One important development direction is to integrate transformers, which were originally located outside the tower or in ground-based distribution rooms, directly inside the wind turbine tower. This integrated solution can significantly shorten the power connection distance between the generator and the transformer, significantly reduce line losses and the use of high-cost cables during high-current transmission, while simplifying the electrical system layout and reducing infrastructure investment.

[0003] However, this integrated design also brings severe heat dissipation challenges. Transformers are usually enclosed in a sealed enclosure, which is then placed in the relatively enclosed space of the tower, resulting in poor overall ventilation. During long-term operation, dry-type transformers continuously generate heat due to copper and iron losses. If this heat cannot be dissipated in a timely and effective manner, the temperature inside the enclosure can easily rise rapidly, forming localized overheating areas. This can affect insulation performance and equipment lifespan, and in severe cases, may lead to malfunctions, threatening the safe and stable operation of the unit.

[0004] Therefore, existing technologies still need further development. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a heat dissipation system for a transformer used in wind power generation, so as to solve the technical problem that transformers integrated inside the tower of wind power generation towers in the prior art cannot effectively dissipate heat.

[0006] To achieve the above-mentioned technical objectives, according to one aspect of this utility model: a heat dissipation system for a transformer used in wind power generation is provided, comprising: a housing, a centrifugal fan, an internal cooler, and a controller. The housing is disposed on the outer wall of a casing housing the transformer, and the housing and the outer wall of the casing form a flow space. The centrifugal fan is disposed within the flow space, and the air inlet of the centrifugal fan is connected to the exhaust outlet of the casing. The air outlet of the centrifugal fan is located within the flow space. The centrifugal fan is used to draw in hot air from the casing and introduce it into the flow space. The internal cooler is disposed within the flow space. Within the space, an internal cooler is located below the centrifugal fan. The internal cooler has an air inlet and an air outlet positioned opposite each other. The air inlet communicates with the flow space, and the air outlet communicates with the air inlet of the housing. The internal cooler is used for heat exchange with hot air. The cooled airflow after heat exchange and cooling by the internal cooler flows back into the housing through the air outlet and the air inlet of the housing. The controller is communicatively connected to the centrifugal fan and is used to obtain a first temperature value and a second temperature value inside the housing, so as to adaptively adjust the speed of the centrifugal fan according to the first temperature value and the second temperature value.

[0007] Furthermore, the heat dissipation system of the wind power transformer also includes: a first temperature detection element, which is installed inside the enclosure and located on the side of the enclosure near the transformer's heat dissipation section; the first temperature detection element is used to detect a first temperature value of the enclosure in real time; the first temperature detection element is connected to a controller to transmit the detected first temperature value to the controller; and a second temperature detection element, which is installed inside the enclosure and located at the connection port of the enclosure; the second temperature detection element is used to detect a second temperature value of the enclosure in real time; the second temperature detection element is connected to the controller. The controller transmits the real-time detected second temperature value to the controller. When both the first and second temperature values ​​are greater than a preset temperature value, the controller adjusts the speed of the centrifugal fan to a first preset speed. When the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan to a second preset speed. When both the first and second temperature values ​​are less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan to a third preset speed. The first preset speed is greater than the second preset speed, and the second preset speed is greater than the third preset speed.

[0008] Furthermore, the internal cooler is provided with a first flow channel, which extends along a first preset trajectory and is used for water flow; the heat dissipation system of the wind power transformer also includes: an external cooler, which is disposed outside the shell, and the external cooler is provided with a second flow channel, which extends along a second preset trajectory. The inlet end of the second flow channel is connected to the outlet end of the first flow channel, and the outlet end of the second flow channel is connected to the inlet end of the first flow channel, so that the water that absorbs heat in the first flow channel flows to the second flow channel. The external cooler cools the water in the second flow channel by means of external air, and the cooled water flows to the first flow channel through the outlet end of the second flow channel.

[0009] Furthermore, the heat dissipation system of the transformer for wind power generation also includes: a water pump assembly, the input end of which is connected to the outlet end of the second flow channel, and the output end of which is connected to the inlet end of the first flow channel, so as to drive the water to circulate through the water pump assembly.

[0010] Further, the water pump assembly includes: a water pump, the input end of which is connected to the outlet end of the second flow channel, and the output end of which is connected to the inlet end of the first flow channel; the water pump is used to provide circulation power; the water pump is communicatively connected to a controller, which adaptively adjusts the speed of the water pump according to the acquired first temperature value and second temperature value; wherein, when both the first temperature value and the second temperature value are greater than a preset temperature value, the controller adjusts the speed of the water pump to a fourth preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the water pump to a fifth preset speed; when both the first temperature value and the second temperature value are less than or equal to the preset temperature value, the controller adjusts the speed of the water pump to a sixth preset speed; the fourth preset speed is greater than the fifth preset speed, and the fifth preset speed is greater than the sixth preset speed.

[0011] Furthermore, the heat dissipation system of the transformer for wind power generation also includes: a first connecting pipe, which is connected to the outlet end of the second flow channel and the inlet end of the first flow channel respectively, and a water pump assembly is installed on the first connecting pipe; the water pump assembly also includes: an expansion tank, which is connected to the first connecting pipe through a first branch, and the expansion tank is located on one side of the input end of the water pump; the expansion tank is used to compensate for changes in the water volume in the first connecting pipe.

[0012] Furthermore, the water pump assembly also includes: a first on / off valve disposed on the first branch for controlling the on / off state of the first branch; and / or, an air vent valve disposed on the first branch for discharging gas.

[0013] Furthermore, the water pump assembly also includes: an injection ball valve, which is disposed on the first connecting pipeline and located on one side of the input end of the water pump; the injection ball valve is used to inject or drain liquid into the first connecting pipeline.

[0014] Furthermore, the water pump assembly also includes: at least one pressure testing connector disposed on the first connecting pipe, the pressure testing connector being detachably connected to a pressure gauge for detecting the pressure within the first connecting pipe via the pressure testing connector.

[0015] Furthermore, the water pump assembly also includes: a third temperature detection element, which is disposed on the first connecting pipe and located at one end of the first connecting pipe near the second flow channel; the third temperature detection element is used to detect the temperature of the water in the first connecting pipe.

[0016] Beneficial effects:

[0017] The present invention provides a heat dissipation system for a wind power transformer, comprising a housing, a centrifugal fan, an internal cooler, and a controller. The housing is mounted on the outer wall of a housing containing the transformer, and a flow space is formed between the housing and the housing. The centrifugal fan is positioned within the flow space, with its intake port connected to the exhaust port of the housing. The blower of the centrifugal fan is located within the flow space, near the top of the flow space, and its blower faces downwards. The centrifugal fan is used to draw in hot air from the housing and introduce it into the flow space. The internal cooler is positioned within the flow space, below the centrifugal fan, and has an inlet and an outlet positioned opposite each other. The inlet communicates with the flow space, and the outlet communicates with the inlet of the housing. The internal cooler is used for heat exchange with the hot air. Thus, the hot air flows downwards under the action of the centrifugal fan, enters the internal cooler through its inlet, and is cooled after heat exchange. The cooled air flows back into the housing through the outlet of the internal cooler and the inlet of the housing, achieving circulating heat dissipation. Simultaneously, the controller communicates with the centrifugal fan, acquiring the first and second temperature values ​​inside the housing in real time. Based on these values, the controller adaptively adjusts the speed of the centrifugal fan, achieving adaptive control of heat dissipation efficiency and improving system energy efficiency and operational stability.

[0018] Therefore, by setting up an independent flow space outside the enclosure and integrating a centrifugal fan and an internal cooler, a forced air-cooling circulation channel is formed. Hot air is drawn out of the enclosure by the centrifugal fan, rapidly cooled by the internal cooler, and then flows back, achieving efficient heat removal and circulating cooling. This significantly improves the transformer's heat dissipation capacity under high load or high temperature environments, thereby stabilizing the transformer's operating temperature, preventing insulation aging and performance degradation caused by localized overheating, and improving the transformer's reliability and service life. Furthermore, the shell and the outer wall of the enclosure together form the flow space, making full use of external space without occupying internal volume. The centrifugal fan and internal cooler are arranged vertically, ensuring smooth airflow, reducing flow resistance, and improving heat exchange efficiency. The overall structure has a high degree of integration, facilitating installation and maintenance. Simultaneously, the closed-loop airflow design effectively prevents external dust, moisture, and other contaminants from entering the enclosure, improving the system's environmental adaptability and operational safety, making it particularly suitable for the complex and variable outdoor environments where wind turbine generators operate. Furthermore, the controller acquires the first and second temperature values ​​at multiple points inside the enclosure in real time, and dynamically adjusts the speed of the centrifugal fan according to temperature changes, achieving adaptive control of airflow. This ensures effective heat dissipation under different operating conditions while avoiding frequent start-stop or excessive operation of the centrifugal fan, thus achieving energy saving, consumption reduction, and extended equipment lifespan. The heat dissipation system for wind power transformers of this invention effectively solves the technical problem of ineffective heat dissipation for transformers integrated inside the wind power tower in existing technologies. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the heat dissipation system of a wind power transformer according to the present invention is shown.

[0021] Figure 2 A schematic diagram of the water pump assembly in the heat dissipation system of a wind power transformer according to the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 1. Shell; 10. Flow space; 2. Centrifugal fan; 3. Internal cooler; 4. Second temperature sensor; 5. External cooler; 6. Water pump assembly; 61. Water pump; 62. Expansion tank; 63. First branch; 64. First on / off valve; 65. Exhaust valve; 66. Liquid injection ball valve; 67. Pressure test connector; 68. Third temperature sensor; 7. First connecting pipeline; 8. Pressure gauge; 9. Drive unit; 11. Air pressure sensor; 12. Second connecting pipeline; 100. Transformer; 200. Housing. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] Please see Figures 1 to 2 According to an embodiment of this utility model, a heat dissipation system for a transformer used in wind power generation is provided, comprising: a housing 1, a centrifugal fan 2, an internal cooler 3, and a controller. The housing 1 is disposed on the outer wall of a box 200 containing the transformer 100, and the housing 1 and the outer wall of the box 200 form a flow space 10. The centrifugal fan 2 is disposed within the flow space 10, and the air inlet of the centrifugal fan 2 is connected to the exhaust outlet of the box 200. The air outlet of the centrifugal fan 2 is located within the flow space 10. The centrifugal fan 2 is used to draw in hot air from the box 200 and introduce it into the flow space 10. The internal cooler 3 is disposed within the flow space 10. Within space 10, an internal cooler 3 is located below the centrifugal fan 2. The internal cooler 3 has an air inlet and an air outlet that are arranged opposite to each other. The air inlet is connected to the flow space 10, and the air outlet is connected to the air inlet of the housing 200. The internal cooler 3 is used for heat exchange with hot air. The cooled airflow after heat exchange and cooling by the internal cooler 3 flows back to the inside of the housing 200 through the air outlet and the air inlet of the housing 200. The controller is communicatively connected to the centrifugal fan 2. The controller is used to obtain a first temperature value and a second temperature value inside the housing 200, so as to adaptively adjust the speed of the centrifugal fan 2 according to the first temperature value and the second temperature value.

[0026] As can be seen, the heat dissipation system for the wind power transformer provided by this utility model includes a housing 1, a centrifugal fan 2, an internal cooler 3, and a controller. The housing 1 is installed on the outer wall of the box 200 containing the transformer 100, and the housing 1 and the box 200 form a flow space 10. The centrifugal fan 2 is installed in the flow space 10, and the air inlet of the centrifugal fan 2 is connected to the air outlet of the box 200. The air outlet of the centrifugal fan 2 is located in the flow space 10, the centrifugal fan 2 is close to the top of the flow space 10, and the air outlet of the centrifugal fan 2 is downward. Centrifugal fan 2 is used to draw in hot air from the housing 200 and guide it into the flow space 10. Internal cooler 3 is located within the flow space 10, below centrifugal fan 2. Internal cooler 3 has an inlet and an outlet end positioned opposite each other. The inlet end communicates with the flow space 10, and the outlet end communicates with the air inlet of housing 200. Internal cooler 3 is used for heat exchange with hot air. Thus, hot air flows downwards under the action of centrifugal fan 2, enters internal cooler 3 through its inlet end, and is cooled after heat exchange. The cooled air then flows back into housing 200 through the outlet end of internal cooler 3 and the air inlet of housing 200, achieving circulating heat dissipation. Meanwhile, the controller is connected to the centrifugal fan 2 for communication. The controller is used to obtain the first temperature value and the second temperature value inside the box 200 in real time, and to adaptively adjust the speed of the centrifugal fan 2 according to the first temperature value and the second temperature value, thereby realizing adaptive control of heat dissipation efficiency and improving system energy efficiency and operational stability.

[0027] Therefore, by setting up an independent flow space 10 outside the housing 200 and integrating the centrifugal fan 2 and the internal cooler 3, a forced air-cooling circulation channel is formed. Hot air is drawn out from inside the housing 200 by the centrifugal fan 2, rapidly cooled by the internal cooler 3, and then flows back, achieving efficient heat removal and circulating cooling. This significantly improves the heat dissipation capacity of the transformer 100 under high load or high temperature environments, thereby stabilizing the operating temperature of the transformer 100, avoiding insulation aging and performance degradation caused by local overheating, and improving the reliability and service life of the transformer. Furthermore, the shell 1 and the outer wall of the housing 200 together constitute the flow space 10, making full use of external space without occupying the internal volume of the housing 200; the centrifugal fan 2 and the internal cooler 3 are arranged vertically, ensuring smooth airflow, reducing flow resistance, and improving heat exchange efficiency. At the same time, the overall structure has a high degree of integration, facilitating installation and maintenance. Meanwhile, the closed-loop airflow design effectively prevents external dust, moisture, and other pollutants from entering the housing 200, improving the system's environmental adaptability and operational safety, making it particularly suitable for the complex and variable outdoor environments where wind turbine generators operate. Furthermore, the controller acquires multiple temperature points (first and second temperature values) within the housing 200 in real time and dynamically adjusts the speed of the centrifugal fan 2 based on temperature changes, achieving adaptive airflow control. This ensures effective heat dissipation under different operating conditions while avoiding frequent start-stops or excessive operation of the centrifugal fan 2, achieving energy saving, consumption reduction, and extended equipment lifespan. This utility model's wind power transformer cooling system effectively solves the technical problem of ineffective heat dissipation for transformers integrated inside the wind turbine tower in existing technologies.

[0028] Specifically, such as Figure 1As shown, the heat dissipation system of the wind power transformer further includes: a first temperature detection element, which is installed inside the housing 200 and located on the side of the housing 200 near the heat dissipation part of the transformer 100; the first temperature detection element is used to detect a first temperature value of the housing 200 in real time; the first temperature detection element is connected to a controller to transmit the detected first temperature value to the controller; and a second temperature detection element 4, which is installed inside the housing 200 and located at the connection port of the housing 200, and is used to detect a second temperature value of the housing 200 in real time; the second temperature detection element 4... The measuring element 4 is connected to the controller to transmit the real-time detected second temperature value to the controller; wherein, when both the first temperature value and the second temperature value are greater than the preset temperature value, the controller adjusts the speed of the centrifugal fan 2 to the first preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan 2 to the second preset speed; when both the first temperature value and the second temperature value are less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan 2 to the third preset speed; the first preset speed is greater than the second preset speed, and the second preset speed is greater than the third preset speed.

[0029] By adopting the above structural configuration, precise monitoring of the internal thermal field distribution is achieved by setting two key temperature detection points within the enclosure 200: the first temperature detection element is located near the heat dissipation section of the transformer 100, accurately reflecting the heating state of the transformer body; the second temperature detection element 4 is located at the exhaust port of the enclosure 200, used to detect the temperature of the hot air to be discharged in real time. This dual-point temperature measurement scheme effectively overcomes the limitations of single-point temperature measurement, comprehensively capturing temperature changes inside the enclosure 200, avoiding the omission of localized overheating, and significantly improving the reliability and representativeness of temperature monitoring. Simultaneously, the controller dynamically adjusts the operating speed of the centrifugal fan 2 based on the feedback signals from the two temperature detection elements and in conjunction with preset temperature values. When the transformer 100 generates a large amount of heat and the overall temperature of the enclosure 200 is high (i.e., both the first and second temperature values ​​exceed the preset temperature values), the controller adjusts the centrifugal fan 2 to a high-speed, first preset speed to achieve rapid and efficient heat dissipation. When only the transformer 100 has a high temperature, while the exhaust temperature of the enclosure 200 is within a controllable range (i.e., the first temperature value is greater than the preset temperature value, and the second temperature value is equal to or less than the preset temperature value), the controller adjusts the centrifugal fan 2 to a medium-speed, second preset speed to meet heat dissipation requirements while reducing energy consumption. When the overall system temperature is within a safe range (i.e., neither temperature value exceeds the preset value), the centrifugal fan 2 is adjusted to a low-speed, third preset speed. This hierarchical control strategy achieves "on-demand heat dissipation," ensuring the safe operation of the transformer 100 under various operating conditions, effectively preventing the centrifugal fan 2 from operating at full load for extended periods, significantly reducing system energy consumption, and improving operating efficiency and intelligence.

[0030] Furthermore, a drive component 9 is provided on the outer wall of the housing 1. This drive component 9 is connected to the centrifugal fan 2 to drive the centrifugal fan 2 to rotate. The drive component 9 is connected to a controller, which adjusts the rotational speed of the centrifugal fan 2 by adjusting the rotational speed of the drive component 9.

[0031] Optionally, the drive component 9 is a motor.

[0032] Optionally, the first temperature detection element is a first temperature sensor, and the second temperature detection element is a second temperature sensor.

[0033] Furthermore, a wind pressure detection device 11 is also installed within the flow space 10 to detect the airflow pressure within the flow space 10 in real time. This wind pressure detection device 11 is connected to the controller signal and can transmit the detected real-time wind pressure value to the controller. When the wind pressure value detected by the wind pressure detection device 11 is lower than the preset wind pressure threshold (i.e., the minimum safe wind pressure value set by the system), the controller triggers an alarm, issuing a fault or abnormality warning signal to remind maintenance personnel to promptly investigate potential hazards. By installing the wind pressure detection device 11 within the flow space 10, the operating status of the centrifugal fan 2 and the normality of airflow circulation can be sensed in real time. Wind pressure is a key parameter reflecting the unobstructed flow of air ducts and the working efficiency of the fan; low wind pressure often indicates abnormal conditions such as fan failure, air duct blockage, or obstructed air outlets. This design achieves dynamic monitoring of the airflow system, effectively improving the operational safety of the heat dissipation system.

[0034] Optionally, the wind pressure detection element 11 is a wind pressure sensor.

[0035] Specifically, such as Figure 1 As shown, the internal cooler 3 is provided with a first flow channel, which extends along a first preset trajectory and is used for water flow. The heat dissipation system of the wind power transformer also includes an external cooler 5, which is disposed outside the housing 1. The external cooler 5 is provided with a second flow channel, which extends along a second preset trajectory. The inlet of the second flow channel is connected to the outlet of the first flow channel, and the outlet of the second flow channel is connected to the inlet of the first flow channel, so that the water that absorbs heat in the first flow channel flows to the second flow channel. The external cooler 5 cools the water in the second flow channel by means of external air, and the cooled water flows to the first flow channel through the outlet of the second flow channel.

[0036] With the above-described structure, the internal cooler 3 has a first flow channel extending along a first preset trajectory, which lengthens the water flow path and increases the heat exchange area, allowing the water medium to fully absorb the heat from the hot air flowing through the internal cooler 3, achieving efficient gas-liquid heat exchange. This design significantly improves the cooling efficiency of the hot air discharged from the casing 200. Simultaneously, by connecting the first flow channel of the internal cooler 3 to the second flow channel of the external cooler 5, a closed water circulation loop is formed. The high-temperature water, after absorbing heat, flows out of the internal cooler 3 and enters the external cooler 5, where it dissipates heat and cools down through natural convection or forced ventilation with the outside air. The cooled water then flows back to the internal cooler 3 to continue participating in heat exchange. The entire process requires no continuous water replenishment, avoiding water waste, while the system operates stably and is easy to maintain.

[0037] Furthermore, the external cooler 5 is located outside the tower.

[0038] Optionally, the external cooler 5 uses air as the heat exchange medium to exchange heat, and the heat is carried away by the air to cool the water in the second flow channel.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the cooling system of the wind power transformer also includes a water pump assembly 6. The input end of the water pump assembly 6 is connected to the outlet end of the second flow channel, and the output end of the water pump assembly 6 is connected to the inlet end of the first flow channel, so that the water is circulated by the water pump assembly 6. With this structural arrangement, the water pump assembly 6 provides stable power to drive the water to circulate continuously along a set path, effectively overcoming the problems of slow circulation speed and unstable flow rate of natural convection. Forced water circulation significantly enhances the efficiency of heat transfer from the internal cooler 3 to the external cooler 5, ensuring that high-temperature water is promptly discharged and cooled, maintaining the system's efficient heat exchange capacity.

[0040] Specifically, such as Figure 2 As shown, the water pump assembly 6 includes: a water pump 61, the input end of which is connected to the outlet end of the second flow channel, and the output end of which is connected to the inlet end of the first flow channel; the water pump 61 is used to provide circulation power; the water pump 61 is communicatively connected to a controller, which adaptively adjusts the speed of the water pump 61 according to the acquired first temperature value and second temperature value; wherein, when both the first temperature value and the second temperature value are greater than a preset temperature value, the controller adjusts the speed of the water pump 61 to a fourth preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the water pump 61 to a fifth preset speed; when both the first temperature value and the second temperature value are less than or equal to the preset temperature value, the controller adjusts the speed of the water pump 61 to a sixth preset speed; the fourth preset speed is greater than the fifth preset speed, and the fifth preset speed is greater than the sixth preset speed.

[0041] With the above-described structure, when the transformer 100 generates a large amount of heat and the overall internal temperature of the enclosure 200 is high (i.e., both the first and second temperature values ​​exceed the preset temperature values), the controller increases the speed of the water pump 61 to the fourth preset speed. This accelerates the cooling water flow, enhances heat exchange capacity, ensures efficient heat dissipation, and effectively prevents the transformer 100 from malfunctioning due to overheating. When only the transformer 100 has a high temperature, while the temperature at the exhaust port of the enclosure 200 is within a controllable range (i.e., the first temperature value is greater than the preset temperature value, and the second temperature value is less than or equal to the preset temperature value), the controller adjusts the speed of the water pump 61 to the fifth preset speed. This meets critical heat dissipation requirements while avoiding excessive system cooling and reducing unnecessary energy consumption. When the overall system temperature is within a safe range (i.e., neither the first nor the second temperature value exceeds the preset temperature value), the controller reduces the speed of the water pump 61 to the sixth preset speed, thereby reducing power consumption and achieving energy-saving operation. Therefore, this dynamic speed control strategy achieves "on-demand cooling," avoiding the energy waste caused by the long-term high-load operation of traditional constant-speed water pumps. Especially under low load conditions, reducing the pump speed significantly reduces power consumption, which not only improves system energy efficiency but also effectively extends the service life of the pump. Over long-term operation, it greatly reduces maintenance costs, demonstrating good economic efficiency and engineering application value.

[0042] Optionally, the controller synchronously adjusts the speed of the centrifugal fan 2 and the speed of the water pump 61 based on the real-time acquired first and second temperature values. When both the first and second temperature values ​​are greater than preset temperature values, the controller adjusts the speed of the centrifugal fan 2 to the first preset speed and the speed of the water pump 61 to the fourth preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan 2 to the second preset speed and the speed of the water pump 61 to the fifth preset speed; when both the first and second temperature values ​​are less than or equal to the preset temperature values, the controller adjusts the speed of the centrifugal fan 2 to the third preset speed and the speed of the water pump 61 to the sixth preset speed.

[0043] Specifically, such as Figure 1 and Figure 2 As shown, the heat dissipation system of the transformer for wind power generation also includes: a first connecting pipe 7, which is connected to the outlet end of the second flow channel and the inlet end of the first flow channel respectively, and a water pump assembly 6 is installed on the first connecting pipe 7; the water pump assembly 6 also includes: an expansion tank 62, which is connected to the first connecting pipe 7 through a first branch 63, and the expansion tank 62 is located on one side of the input end of the water pump 61; the expansion tank 62 is used to compensate for changes in the water volume in the first connecting pipe 7.

[0044] With the above-described structure, the expansion tank 62 is connected to the first connecting pipe 7 via the first branch 63 and is located on the inlet side of the water pump 61. It can dynamically absorb or release volume changes in the cooling water caused by temperature variations. When the water temperature rises and the volume expands, excess water enters the expansion tank 62; when the temperature drops and the volume contracts, the water flows back to the pipe, effectively mitigating pressure fluctuations within the system and preventing damage to pipes, joints, or equipment due to excessive pressure, or water pump cavitation due to negative pressure. Simultaneously, the expansion tank 62, located on the inlet side of the water pump 61, maintains stable pressure at the pump inlet, preventing "airlock" or "dry running" caused by water contraction or air accumulation, reducing vibration and noise during pump operation, and extending its service life. Furthermore, stable inlet pressure contributes to efficient and stable pump operation, improving the reliability of the entire cooling system.

[0045] Furthermore, such as Figure 2 As shown, the water pump assembly 6 further includes: a first on / off valve 64, which is disposed on the first branch 63 and is used to control the on / off state of the first branch 63; and / or, an air vent valve 65, which is disposed on the first branch 63 and is used to discharge gas.

[0046] With the above-described structure, the first on / off valve 64 is located on the first branch 63. When maintenance or replacement of the expansion tank 62 is required, it can disconnect the expansion tank 62 from the main circulation pipeline, thus achieving isolation without purging the entire cooling water system. This greatly simplifies the maintenance process, reduces downtime, and improves operational efficiency. The vent valve 65 is located on the first branch 63 (usually at a high point in the pipeline or a location prone to air accumulation). It automatically vents air from the first connecting pipeline 7, effectively preventing water flow obstruction caused by air blockage and cavitation at the inlet of the water pump 61 caused by gas accumulation. This protects the pump impeller and sealing structure, improving system stability and safety.

[0047] Optionally, the first on / off valve 64 and the exhaust valve 65 are both located on the first branch 63, with the exhaust valve 65 located between the expansion tank 62 and the first on / off valve 64.

[0048] Optionally, the first on / off valve 64 is a ball valve.

[0049] Optionally, the expansion tank 62 is located above the first connecting pipe 7.

[0050] Furthermore, the inlet end of the second flow channel is connected to the outlet end of the first flow channel via the second connecting pipe 12.

[0051] Specifically, the water pump assembly 6 further includes: a liquid injection ball valve 66, which is disposed on the first connecting pipe 7 and located on one side of the input end of the water pump 61; the liquid injection ball valve 66 is used to inject or drain liquid into the first connecting pipe 7.

[0052] With the above-described structure, a liquid injection ball valve 66 is installed to inject cooling water into the closed-loop water circulation pipeline after the cooling system is installed or restarted after a long period of shutdown. Opening the liquid injection ball valve 66 allows for easy connection to external liquid filling equipment or manual injection of cooling water, ensuring the pipeline is quickly and fully filled with liquid, effectively eliminating the "empty pipeline" state and ensuring safe system startup. Simultaneously, when it is necessary to inspect, clean, or replace parts of the water pump 61, internal cooler 3, or pipelines, the water in the circulation system can be safely drained through the liquid injection ball valve 66, avoiding liquid leakage during disassembly that could cause equipment contamination or environmental impact. This design significantly simplifies the maintenance process and reduces the difficulty and time cost of operation and maintenance.

[0053] Furthermore, the expansion tank 62 is located between the injection ball valve 66 and the input end of the water pump 61.

[0054] Specifically, such as Figure 2 As shown, the water pump assembly 6 further includes: at least one pressure testing connector 67, which is disposed on the first connecting pipe 7, and is used for detachable connection of a pressure gauge 8, which is used to detect the pressure in the first connecting pipe 7 through the pressure testing connector 67.

[0055] With the above-described structure, the working pressure within the cooling water circulation system can be monitored in real time via a pressure gauge 8 connected to the pressure testing connector 67. This data helps determine whether the water pump is operating normally, whether there are blockages or leaks in the pipeline, and whether the water flow is smooth, thereby ensuring that the entire cooling system operates safely and efficiently.

[0056] Optionally, such as Figure 2 As shown, there are two pressure test connectors 67, located near the input and output ends of the water pump 61, respectively. The pressure test connector 67 located at the input end of the water pump 61 is positioned between the injection ball valve 66 and the first branch 63.

[0057] Specifically, the water pump assembly 6 also includes a third temperature sensor 68, which is disposed on the first connecting pipe 7 and located at one end of the first connecting pipe 7 near the second flow channel. The third temperature sensor 68 is used to detect the temperature of the water in the first connecting pipe 7. With this structural arrangement, by placing the third temperature sensor 68 on the side of the first connecting pipe 7 near the second flow channel (i.e., the outlet end of the external cooler), the temperature of the cooling water flowing out of the external cooler 5 and about to enter the internal cooler 3 can be accurately detected. This temperature value allows for real-time evaluation of the heat dissipation performance and heat exchange capacity of the external cooler 5, thereby determining whether its cooling effect is normal, and providing a reliable basis for system operation status monitoring and fault early warning.

[0058] Optionally, the third temperature detection element 68 is a third temperature sensor.

[0059] Optionally, the working process of the heat dissipation system of the transformer for wind power generation is as follows:

[0060] When the drive unit 9 starts and drives the centrifugal fan 2, the centrifugal fan 2 creates a negative pressure at its air inlet, drawing hot air from inside the housing 200 into the flow space 10 through the exhaust port. After entering the flow space 10, the hot air flows downwards under the combined action of the suction of the centrifugal fan 2 and the airflow channel structure, entering the interior of the internal cooler 3 through its inlet. In the internal cooler 3, the hot air undergoes efficient heat exchange with the cooling water in the first flow channel; the heat is absorbed by the water medium, and the air temperature is significantly reduced. The cooled air then flows back into the housing 200 through the air inlet of the housing 200 via the outlet of the internal cooler 3, forming a closed internal circulation air duct to achieve continuous cooling of the transformer 100.

[0061] Meanwhile, the cooling water in the first flow channel absorbs heat and its temperature rises. It then flows into the second flow channel of the external cooler 5 through the second connecting pipe 12. In the external cooler 5, the water that has absorbed heat exchanges heat with the outside air through natural convection or forced heat dissipation, thus achieving cooling. The cooled water flows out from the outlet of the second flow channel, enters the water pump assembly 6 through the first connecting pipe 7, and is then pumped back to the first flow channel by the water pump 61, completing a closed-loop water circulation and continuously removing heat from inside the tower to the external environment.

[0062] During the operation of the heat dissipation system, the first temperature detection element and the second temperature detection element 4 detect the first temperature value and the second temperature value in real time, respectively, and transmit the detected first temperature value and the second temperature value to the controller. The controller then adaptively adjusts the speed of the centrifugal fan 2 and the speed of the water pump based on the detected first temperature value and the second temperature value.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0065] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0066] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0067] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A heat dissipation system for a transformer used in wind power generation, characterized in that, include: The housing (1) is set on the outer wall of the box (200) containing the transformer (100), and the housing (1) and the outer wall of the box (200) form a flow space (10). A centrifugal fan (2) is disposed in the flow space (10), and the air inlet of the centrifugal fan (2) is connected to the exhaust port of the housing (200); the air outlet of the centrifugal fan (2) is located in the flow space (10); the centrifugal fan (2) is used to draw in hot air from the housing (200) and introduce it into the flow space (10); An internal cooler (3) is disposed within the flow space (10) and is located below the centrifugal fan (2). The internal cooler (3) has an air inlet and an air outlet disposed opposite to each other. The air inlet is connected to the flow space (10), and the air outlet is connected to the air inlet of the housing (200). The internal cooler (3) is used for heat exchange with hot air. The cooled airflow after heat exchange and cooling by the internal cooler (3) flows back to the inside of the housing (200) through the air outlet and the air inlet of the housing (200). The controller is communicatively connected to the centrifugal fan (2). The controller is used to obtain a first temperature value and a second temperature value inside the housing (200) so as to adaptively adjust the speed of the centrifugal fan (2) according to the first temperature value and the second temperature value.

2. The heat dissipation system for a wind power transformer according to claim 1, characterized in that, The heat dissipation system of the wind power transformer also includes: A first temperature detection element is disposed inside the enclosure (200) and located on the side of the enclosure (200) near the heat dissipation part of the transformer (100); the first temperature detection element is used to detect a first temperature value of the enclosure (200) in real time; the first temperature detection element is connected to the controller to transmit the first temperature value detected in real time to the controller. The second temperature detection element (4) is disposed inside the housing (200) and located at the connection port of the housing (200). The second temperature detection element (4) is used to detect the second temperature value of the housing (200) in real time. The second temperature detection element (4) is connected to the controller to transmit the detected second temperature value to the controller. Wherein, when both the first temperature value and the second temperature value are greater than the preset temperature value, the controller adjusts the speed of the centrifugal fan (2) to a first preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan (2) to a second preset speed; when both the first temperature value and the second temperature value are less than or equal to the preset temperature value, the controller adjusts the speed of the centrifugal fan (2) to a third preset speed; the first preset speed is greater than the second preset speed, and the second preset speed is greater than the third preset speed.

3. The heat dissipation system for a wind power transformer according to claim 2, characterized in that, The internal cooler (3) is provided with a first flow channel, which extends along a first preset trajectory and is used for water flow; the heat dissipation system of the wind power transformer also includes: An external cooler (5) is provided outside the housing (1). The external cooler (5) has a second flow channel. The second flow channel extends along a second preset trajectory. The water inlet of the second flow channel is connected to the water outlet of the first flow channel. The water outlet of the second flow channel is connected to the water inlet of the first flow channel, so that the water that absorbs heat in the first flow channel flows to the second flow channel. The external cooler (5) cools the water in the second flow channel by means of external air. The cooled water flows to the first flow channel through the water outlet of the second flow channel.

4. The heat dissipation system for a wind power transformer according to claim 3, characterized in that, The heat dissipation system of the wind power transformer further includes a water pump assembly (6), the input end of which is connected to the outlet end of the second flow channel, and the output end of which is connected to the inlet end of the first flow channel, so as to drive water to circulate through the water pump assembly (6).

5. The heat dissipation system for a wind power transformer according to claim 4, characterized in that, The water pump assembly (6) includes: a water pump (61), the input end of which is connected to the outlet end of the second flow channel, and the output end of which is connected to the inlet end of the first flow channel; the water pump (61) is used to provide circulation power; the water pump (61) is communicatively connected to the controller, which adaptively adjusts the speed of the water pump (61) according to the first temperature value and the second temperature value obtained. Wherein, when both the first temperature value and the second temperature value are greater than the preset temperature value, the controller adjusts the speed of the water pump (61) to a fourth preset speed; when the first temperature value is greater than the preset temperature value and the second temperature value is less than or equal to the preset temperature value, the controller adjusts the speed of the water pump (61) to a fifth preset speed; when both the first temperature value and the second temperature value are less than or equal to the preset temperature value, the controller adjusts the speed of the water pump (61) to a sixth preset speed; the fourth preset speed is greater than the fifth preset speed, and the fifth preset speed is greater than the sixth preset speed.

6. The heat dissipation system for a wind power transformer according to claim 5, characterized in that, The heat dissipation system of the wind power transformer further includes: a first connecting pipe (7), which is connected to the outlet end of the second flow channel and the inlet end of the first flow channel respectively, and the water pump assembly (6) is installed on the first connecting pipe (7); The water pump assembly (6) further includes an expansion tank (62), which is connected to the first connecting pipe (7) via a first branch (63) and is located on one side of the input end of the water pump (61); the expansion tank (62) is used to compensate for changes in the water volume in the first connecting pipe (7).

7. The heat dissipation system for a wind power transformer according to claim 6, characterized in that, The water pump assembly (6) also includes: A first on / off valve (64) is disposed on the first branch (63) for controlling the on / off state of the first branch (63); and / or, An exhaust valve (65) is provided on the first branch (63) for discharging gas.

8. The heat dissipation system for a wind power transformer according to claim 6, characterized in that, The water pump assembly (6) further includes: a liquid injection ball valve (66), which is disposed on the first connecting pipeline (7) and located on one side of the input end of the water pump (61); the liquid injection ball valve (66) is used to inject or drain liquid into the first connecting pipeline (7).

9. The heat dissipation system for a wind power transformer according to claim 6, characterized in that, The water pump assembly (6) further includes at least one pressure testing connector (67) disposed on the first connecting pipe (7), the pressure testing connector (67) being detachably connected to a pressure gauge (8) for detecting the pressure in the first connecting pipe (7) via the pressure testing connector (67).

10. The heat dissipation system for a wind power transformer according to claim 6, characterized in that, The water pump assembly (6) further includes a third temperature sensor (68), which is disposed on the first connecting pipe (7) and located at one end of the first connecting pipe (7) near the second flow channel; the third temperature sensor (68) is used to detect the temperature of the water in the first connecting pipe (7).

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