Gas-insulated transformer for fan tower drum
By using a separate gas-insulated transformer in the wind power generation system, the problems of excessive distance between the transformer and the wind turbine generator and heat management are solved, resulting in reduced power loss, space saving and improved safety.
Patent Information
- Application Number
- CN202422623263.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In existing wind power systems, the transformer is located at the bottom of the tower, resulting in an excessive distance between it and the wind turbine, which increases cable costs and power transmission losses. At the same time, the existing transformer generates a lot of heat during operation, requiring a cooling device that increases its weight and volume, and the space at the top of the tower is limited.
The wind turbine tower adopts a separate gas-insulated transformer, with the transformer body and radiator arranged separately. It uses insulating gas medium and forced gas circulation pump to form a circulating cooling system through inlet pipe, outlet pipe and radiator. The transformer body is set at the top of the tower and the radiator is set at the bottom.
It reduces power transmission losses, lowers the space and cost occupied by transformers, improves safety and reliability, simplifies maintenance, and is environmentally friendly, reducing its impact on the environment.
Smart Images
Figure CN223486832U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of high voltage equipment, and in particular to a gas-insulated transformer for wind turbine towers. Background Technology
[0002] Wind power generation refers to the conversion of the kinetic energy of wind into electrical energy through a wind power generation system. A wind power generation system consists of a wind turbine generator, a speed increaser, a generator, a deflector, a tower (also called a tower pole), a speed limiting safety mechanism, and an energy storage device. It uses the kinetic energy of the wind to drive the wind turbine blades to rotate, which is converted into mechanical energy. The speed increaser then increases the rotation speed to drive the generator to generate electricity.
[0003] Because wind turbine generators produce relatively low voltage, typically around 400 volts, transformers are usually installed inside the tower to convert low-voltage electricity into high-voltage electricity for distribution to the power grid. Current technologies typically use dry-type or oil-immersed transformers. Furthermore, due to the influence of wind power bidding policies, high-capacity, high-voltage transformers are often chosen. These transformers generate a lot of heat during operation, requiring cooling devices to ensure stable operation and extend their service life. This undoubtedly increases the weight and size of the transformer itself. However, the space at the top of the tower is too small, so the transformer can only be installed at the bottom of the tower.
[0004] However, in actual use, it was found that if the transformer is set at the bottom of the tower, the distance between the transformer and the wind turbine is relatively long, which not only increases the cost of cables, but also causes losses during the transmission of electrical energy. Utility Model Content
[0005] To reduce the loss of electrical energy transmitted from the wind turbine generator to the transformer, this application provides a gas-insulated transformer for the wind turbine tower.
[0006] This application provides a gas-insulated transformer for wind turbine towers, which adopts the following technical solution:
[0007] A gas-insulated transformer for a wind turbine tower includes a transformer body and a radiator disposed within the wind turbine tower. The transformer body and the radiator are connected by an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to and communicates with the bottom of the radiator, and the other end of the inlet pipe is connected to and communicates with the bottom of the transformer. One end of the outlet pipe is connected to and communicates with the top of the transformer, and the other end of the outlet pipe is connected to and communicates with the top of the radiator. The radiator is equipped with a cooling device for cooling the gas entering the radiator through the outlet pipe. The outlet pipe is equipped with an air pump for driving air circulation.
[0008] By adopting the above technical solution, the transformer body and radiator are set up separately. Compared with a transformer body and radiator integrated into one unit, the volume of the transformer body is reduced. In actual installation, the distance between the transformer body and the wind turbine generator can be shortened, thereby reducing the loss of electrical energy transmitted from the wind turbine generator to the transformer body. The air inlet pipe, radiator, air outlet pipe and cooling equipment work together to effectively improve the safety of the gas-insulated transformer during use and can extend its service life to a certain extent. The air pump facilitates the circulation of gas between the air inlet pipe, radiator, air outlet pipe and transformer body.
[0009] Preferably, the transformer body contains an insulating medium, which is selected as an insulating gas.
[0010] By adopting the above technical solution, compared with dry-type transformers or oil-immersed transformers, on the one hand, there is no need to set up an additional oil conservator, so the overall height of the transformer body is lower, effectively reducing the space occupied by the transformer body in the wind turbine tower. On the other hand, the insulating gas usually has non-flammable and non-explosive characteristics, and its physical and chemical properties are very stable. In actual use, not only is it not necessary to set up an isolation wall in the equipment room inside the wind turbine tower, further saving space inside the wind turbine tower and the cost of installing the transformer body, but it is also less likely to cause the transformer body to become damp due to the failure to replace the silicone breather in time, effectively improving its safety and reliability. In addition, the cost of charging, releasing, transporting and storing the insulating gas is more convenient and economical than that of transformer oil, which facilitates the subsequent maintenance of the transformer body.
[0011] Preferably, the transformer body is mounted on the nacelle platform of the wind turbine generator set at the top of the tower, and the radiator is mounted on the equipment platform at the bottom of the tower.
[0012] By adopting the above technical solution, the integrated transformer body and radiator in the prior art are staggered in the vertical direction of the tower, which not only effectively shortens the distance between the transformer body and the wind turbine generator set, but also reduces the overall footprint of the transformer. Furthermore, since the insulating medium in this application is an insulating gas, when the transformer body and radiator are set in upper and lower layers in a very tall tower, there is no need to consider the issues of oil flow and oil pressure.
[0013] Preferably, the insulating gas is SF6.
[0014] By adopting the above technical solution, SF6 is an inert gas that is difficult to be affected by external conditions and other environments. This allows it to maintain stable performance in various environments. Moreover, SF6 not only does not directly harm the environment, but its environmental impact can also be reduced through recycling and reuse, thus exhibiting good environmental friendliness.
[0015] Preferably, the air pump is a forced gas circulation air pump.
[0016] By adopting the above technical solution and setting up a forced gas circulation pump, it is convenient to transport high-temperature gas toward the radiator, thereby improving the reliability of heat dissipation of the transformer body through the radiator.
[0017] In summary, this application includes at least one of the following beneficial technical effects:
[0018] 1. By separating the transformer body and the radiator, the volume of the transformer body is reduced compared to a transformer body and radiator integrated into one unit. In the actual installation process, the distance between the transformer body and the wind turbine generator can be shortened, thereby reducing the loss of electrical energy transmitted from the wind turbine generator to the transformer body.
[0019] 2. Compared with dry-type transformers or oil-immersed transformers, the gas-insulated transformer in this application does not require an additional oil conservator, which effectively reduces the space occupied by the transformer body in the fan tower. On the other hand, it is less likely to cause the transformer body to become damp due to the failure to replace the silicone breather in time, which effectively improves its safety and reliability. Moreover, the cost of filling, releasing, transporting and storing insulating gas is more convenient and economical than that of transformer oil, which facilitates the subsequent maintenance of the transformer body. Attached Figure Description
[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0021] Explanation of reference numerals in the attached drawings: 1. Wind turbine tower; 11. Nacelle platform; 12. Equipment platform; 2. Transformer body; 3. Radiator; 4. Inlet pipe; 5. Outlet pipe; 6. Forced gas circulation pump; 7. Cooling equipment. Detailed Implementation
[0022] The following is in conjunction with the appendix Figure 1 The utility model is described in further detail.
[0023] This application discloses a gas-insulated transformer for a wind turbine tower 1, referring to... Figure 1The system includes a transformer body 2 and a radiator 3 installed inside the wind turbine tower 1. The transformer body 2 and the radiator are connected by an air inlet pipe 4 and an air outlet pipe 5. The transformer body 2 contains an insulating medium, which is an insulating gas. Compared with dry-type transformers or oil-immersed transformers, on the one hand, there is no need to set up an additional oil tank, so the overall height of the transformer body 2 is lower, effectively reducing the space occupied by the transformer body 2 in the wind turbine tower 1. On the other hand, the insulating gas usually has non-flammable and non-explosive characteristics, and its physical and chemical properties are very stable. In actual use, there is no need to set up an isolation wall in the equipment room inside the wind turbine tower 1, further saving space inside the wind turbine tower 1 and the cost of installing the transformer body 2. It also reduces the risk of the transformer body 2 getting damp due to the failure to replace the silicone breather in time, effectively improving its safety and reliability. In addition, the cost of charging, releasing, transporting and storing the insulating gas is more convenient and economical than that of transformer oil, which facilitates the subsequent maintenance of the transformer body 2.
[0024] In this embodiment of the application, the insulating gas selected is SF6 (sulfur hexafluoride). SF6 is an inert gas that is difficult to be affected by external conditions and other environments. This allows it to maintain stable performance in various environments. Moreover, SF6 not only does not directly harm the environment, but its environmental impact can also be reduced through recycling and reuse, thus exhibiting good environmental friendliness.
[0025] Reference Figure 1 Since the insulating medium inside the transformer body 2 is an insulating gas, the distance between the transformer body 2 and the wind turbine generator set can be appropriately reduced, thereby reducing the loss of electrical energy transmitted from the wind turbine generator set to the transformer body 2. The transformer body 2 is set on the nacelle platform 11 of the wind turbine generator set at the top of the wind turbine tower 1, while the radiator 3 is set on the equipment platform 12 at the bottom of the tower. By staggering the integrated transformer body 2 and radiator 3 in the vertical direction of the tower, the distance between the transformer body 2 and the wind turbine generator set is effectively shortened, and the overall footprint of the transformer is reduced. Furthermore, since the insulating medium in this application is an insulating gas, when the transformer body and radiator 3 are set in separate upper and lower layers in a very tall tower, the problems of oil flow and oil pressure do not need to be considered.
[0026] Reference Figure 1One end of the air inlet pipe 4 is connected to and communicates with the bottom of the side wall of the radiator 3, and the other end of the air inlet pipe 4 is connected to and communicates with the bottom of the transformer body 2. One end of the air outlet pipe 5 is connected to and communicates with the top of the transformer body 2, and the other end of the air outlet pipe 5 is connected to and communicates with the radiator 3. The high-temperature gas generated during the operation of the transformer body 2 will accumulate at the top of the transformer body 2, so that the hotter gas at the top of the transformer body 2 is transported through the air outlet pipe 5 to the radiator 3 located at the bottom of the wind turbine tower 1. After being cooled by the radiator 3, it is transported through the air inlet pipe 4 to the transformer body 2 located at the top of the wind turbine tower 1. The air outlet pipe 5 is equipped with an air pump for driving air circulation. In this embodiment, the air pump is a forced gas circulation air pump 6. By setting the forced gas circulation air pump 6, it is easy to transport the high-temperature gas toward the radiator 3, thereby improving the reliability of cooling the transformer body 2 through the radiator 3.
[0027] Reference Figure 1 The radiator 3 is also connected to an external cooling device 7. The cooling device 7 is used to cool the gas entering the radiator 3 through the exhaust pipe 5, thereby improving the reliability of cooling the high-temperature gas and extending the service life of the transformer body 2 to a certain extent. In this embodiment, the cooling device 7 can be a fan.
[0028] The implementation principle of a gas-insulated transformer for a wind turbine tower 1 in this application embodiment is as follows: the high-temperature gas generated during the operation of the transformer body 2 will accumulate at the top of the transformer body 2. The high-temperature gas at the top of the transformer body 2 can be transported towards the radiator 3 through the forced gas circulation pump 6 and the outlet pipe 5. After being cooled by the radiator 3 and the fan, it is then transported to the transformer body 2 located at the top of the wind turbine tower 1 through the inlet pipe 4.
[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A gas-insulated transformer for a wind turbine tower (1), characterized in that, The system includes a transformer body (2) and a radiator (3) installed inside the wind turbine tower (1). The transformer body (2) and the radiator (3) are connected by an air inlet pipe (4) and an air outlet pipe (5). One end of the air inlet pipe (4) is connected to and communicates with the radiator (3), and the other end of the air inlet pipe (4) is connected to and communicates with the transformer body (2). One end of the air outlet pipe (5) is connected to and communicates with the transformer body (2), and the other end of the air outlet pipe (5) is connected to and communicates with the radiator (3). The radiator (3) is equipped with a cooling device (7), which is used to cool the gas entering the radiator (3) through the air outlet pipe (5). The air outlet pipe (5) is equipped with an air pump for driving air circulation.
2. The gas-insulated transformer for the wind turbine tower (1) according to claim 1, characterized in that, The transformer body (2) contains an insulating medium, which is an insulating gas.
3. The gas-insulated transformer for the wind turbine tower (1) according to claim 1, characterized in that, The transformer body (2) is installed on the nacelle platform (11) of the wind turbine generator set at the top of the wind turbine tower (1), and the radiator (3) is installed on the equipment platform (12) at the bottom of the tower.
4. The gas-insulated transformer for the wind turbine tower (1) according to claim 1, characterized in that, The insulating gas used is SF6.
5. The gas-insulated transformer for the wind turbine tower (1) according to claim 1, characterized in that, The air pump is a forced gas circulation air pump (6).