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DE-202025106754-U1 - Wind turbine and wind turbine power cabinet

DE202025106754U1DE 202025106754 U1DE202025106754 U1DE 202025106754U1DE-202025106754-U1

Abstract

Wind turbine (100), with a nacelle (104) in which an inverter (300), an electric generator (200) and a machine-side choke (500) are provided, wherein the machine-side choke (500) is arranged between the electric generator (200) and the inverter (300), wherein the machine-side choke (500) has three choke coils, each choke coil (500) having a first and second end (501, 502), a core package (530) in between and a winding (540), wherein the core package (530) comprises a plurality of stacked electrical steel sheets (503) as well as a first and second core package end face (531, 532), wherein each choke coil of the machine-side choke (500) has an air cooling unit (550), wherein the air guidance unit (550) has a first air guidance channel (551) at the first core package end face (531) and a second air guidance channel (552) at the second core package end face (532), further with a line choke (400) which is coupled to an output of the inverter (300), wherein the mains choke (400) comprises three choke coils (410) and a yoke (430), wherein the yoke (430) comprises a yoke lower part (431) and a yoke upper part (432), wherein each choke coil (410) has a first and second end face (410a, 410b) and a core package (411) in between, wherein each choke coil (410) has a first water cooling unit (440, 441 - 444) which is connected with its first end to an end (411b) of the core package (411), wherein a second end of the water cooling unit (440) serves as a winding contact surface and is designed to be rounded or curved, wherein each choke coil (410) has at least one further water cooling unit which has a first straight end and a second curved or rounded end as a winding contact surface, wherein this water cooling unit is arranged between two winding sections.

Assignees

  • WOBBEN PROPERTIES GMBH

Dates

Publication Date
20260513
Application Date
20250328
Priority Date
20250328

Claims (6)

  1. Wind turbine (100), comprising a nacelle (104) in which an inverter (300), an electric generator (200) and a machine-side choke (500) are provided, wherein the machine-side choke (500) is arranged between the electric generator (200) and the inverter (300), in which the machine-side choke (500) has three choke coils, each choke coil (500) having a first and second end (501, 502), a core pack (530) between them and a winding (540), in which the core pack (530) has a plurality of stacked electrical steel sheets (503) and a first and second core pack end face (531, 532), in which each choke coil of the machine-side choke (500) has an air cooling unit (550), in which the air guide unit (550) has a first air guide channel. (551) on the first core package end face (531) and a second air guide channel (552) on the second core package end face (532), furthermore with a line choke (400) which is coupled to an output of the inverter (300), the line choke (400) comprising three choke coils (410) and a yoke (430), the yoke (430) comprising a yoke lower part (431) and a yoke upper part (432), each choke coil (410) comprising a first and second end face (410a, 410b) and a core package (411) in between, each choke coil (410) comprising a first water cooling unit (440, 441-444) which is connected with its first end to an end (411b) of the core package (411) abuts, where a second end of the water cooling unit (440) serves as a winding contact surface and is rounded or curved, whereby each choke coil (410) has at least one further water cooling unit which has a first straight end and a second curved or rounded end as a winding contact surface, wherein this water cooling unit is arranged between two winding sections.
  2. Wind turbine (100) after Claim 1 , furthermore with: a first and second connecting rail (510, 520), wherein the second connecting rail (520) is located on one side of the second air duct (552).
  3. Wind turbine (100) after Claim 1 or 2 , wherein the winding (540) has a first winding section (541) on the first air guide channel (551), a second winding area (542) on a longitudinal side of the core package (530), a third winding area (543) between the first and second terminal rails (510, 520) and a fourth winding area (544) on the longitudinal side of the core package (530).
  4. Wind turbine (100) after Claim 1 , wherein the water cooling units (440, 441 - 444) each have two water guide sections (441c) which are suitable for receiving a cooling medium of the water cooling.
  5. Wind turbine (100) after Claim 1 or 4 , further comprising a first water cooling unit (443) having a first and second end (443a, 443b) between a first core package end (411a) and a busbar (420), a second water cooling unit (444) having a first straight end and a second rounded or curved end (444b) which serves as a winding contact surface, wherein a first winding section (412a) is located between the busbar (412) and the second water cooling unit (444), wherein a first end (444a) of the second water cooling unit (444) is located at the first winding section (412a), wherein a second winding section (412b) is wound around the second end (444b) of the second water cooling unit (444) so that the windings (412) are located at the winding contact surface of the second water cooling unit (444), a third water cooling unit (441) which a first and second end (441a, 441b) which serves as a winding contact surface, wherein the first end (441a) abuts the second end (411b) of the core package and is straight, wherein the second end (441b) of the third water cooling unit (441) is curved or rounded and constitutes a winding contact surface, wherein a third winding section (412c) is wound around the second end (441b) so that the windings abut the winding contact surface, a fourth water cooling unit (442) which has a first and second end (442a, 442b), wherein the first end (442a) is straight and abuts the third winding section (412c), wherein the second end (442b) of the fourth water cooling unit (442) is rounded or curved and constitutes a winding contact surface represents a fourth winding section (412d) is wound around the second end (442b) so that the windings are in contact with the winding contact surface.
  6. Wind turbine power cabinet, comprising a line choke with three choke coils (410) and a yoke (430), wherein the yoke (430) has a yoke lower part (431) and a yoke upper part (432), the line choke (400) being arranged in a first position, each choke coil (410) having a first and second end face (410a, 410b) and a core assembly (411) between them, each choke coil (410) having a first water cooling unit (440, 441-444) which rests with its first end against an end (411b) of the core assembly (411), a second end of the water cooling unit (440) serving as a winding contact surface and being rounded or curved, each choke coil (410) having at least one further water cooling unit which has a first straight end and a a second curved or rounded end as a winding contact surface, wherein this water cooling unit is arranged between two winding sections, and a machine-side choke (500), comprising three choke coils, each choke coil having a first and second side (501, 502) and a core assembly (530) in between, each choke coil having a first air guide channel, the first ends of which abut a first end face (531) of the core assembly (530), each second end of a first air guide channel abuts a terminal bus, each second end of a second air guide channel is surrounded by a winding section. the machine-side choke (500) is arranged in a second position, the second position being above the first position.

Description

The present invention relates to a wind turbine and a wind turbine power cabinet. A wind turbine has an aerodynamic rotor with rotor blades, which is directly or indirectly mechanically coupled to an electric generator. The rotation of the aerodynamic rotor sets the generator in motion, thus producing electrical energy. The generator is coupled to a machine-side choke (machine choke). The machine-side choke is coupled to an inverter and is therefore located between the generator and the inverter. A grid-side choke (i.e., a grid-side choke) is provided at the inverter output. The wind turbine is connected to a power grid via a grid output connection. Particularly in wind turbines equipped with inverters, a grid-side choke can be installed between the inverter and the power grid. In a three-phase wind turbine, a choke is typically used for each phase, or a three-phase choke is employed. The three chokes of a three-phase system can be combined into a single three-phase choke. This can be achieved using a core made of stacked electrical steel sheets. Such chokes heat up during operation and can reach critical temperatures. This can significantly reduce the choke's efficiency and lifespan. Cooling the machine-side choke is therefore essential, as its operation involves significant heat losses. These heat losses arise from both copper losses in the windings and core losses in the magnetic material, namely the electrical steel sheets that together form a core pack. If the generated heat is not effectively dissipated, overheating can occur, impairing the electrical and mechanical properties of the choke and significantly reducing its service life. Cooling is a particularly challenging task in wind turbines, as the turbine-side throttle valve can be installed, for example, in the nacelle. Space is limited in this area, and the ambient temperature may already be elevated due to heat generated by other components such as the generator and inverter. Therefore, an effective cooling system must be compact while simultaneously offering high heat dissipation capacity. Passive cooling systems, such as natural convection, can be sufficient in some cases, but require careful design of the throttle to maximize heat dissipation. Applications with higher thermal demands require active cooling systems, such as forced air cooling using fans or liquid cooling. However, these systems must be designed so that they do not significantly increase the energy consumption of the wind turbine. The cooling system must also withstand the mechanical stresses and environmental influences typical of a nacelle. The strong vibrations and load changes during operation require a robust design, while corrosive environments, especially in offshore installations, necessitate the use of resistant materials and effective seals. Finally, uniform heat distribution within the turbine-side throttle is crucial to avoid thermal stresses and hotspots. This helps increase the throttle's reliability and extend its maintenance intervals. Ease of maintenance is another important factor, as the nacelle of a wind turbine is often difficult to access. It is therefore an object of the invention to provide a wind turbine with a machine-side choke and a grid choke that improves the cooling of a machine-side choke and a grid choke in a wind turbine and can reduce power loss. The problem is solved by a wind turbine according to claim 1 and by a wind turbine power cabinet according to claim 6. Thus, a wind turbine with a nacelle is planned. The nacelle houses an electric generator and a generator-side choke. The generator-side choke has at least three choke coils, each with air cooling. The air cooling system includes cooling units, each with one end that can be connected to a core assembly of the choke coil and its opposite end surrounded by a winding. A choke coil can consist of a core assembly, aluminum windings, and air cooling. Furthermore, a line choke with water cooling is provided in the nacelle. A wind turbine with a nacelle is provided, containing an inverter, an electric generator, a machine-side choke, and a line choke. The machine-side choke is located between the electric generator and the inverter. The machine-side choke has three choke coils. Each choke coil has a first and second end, a core pack between them, and a winding. The core pack consists of multiple stacked electrical steel sheets and has a first and second core pack end face. Each choke coil of the machine-side choke has an air cooling unit. The air cooling unit has a first air guide channel at the first core pack end face and a second air guide channel at the second core pack end face. The line choke is located at the inverter output. The line choke has three choke coils and a yoke. The yoke has a lower and upper yoke section. Each choke coil of the line choke has a first and second end face and a core pack between them. Each choke coil of the line choke has a first water cooling unit, the first