Wind power converter

Abstract

The embodiment of the invention provides a wind power converter which comprises a power cabinet with a first containing space, the power cabinet comprises a partition plate and a back plate, the partition plate divides the first containing space into a power module space and a reactance module space, and the power cabinet further comprises a first draught fan and a second draught fan. The first fan is arranged on the partition plate and generates airflow in the direction from the power module space to the reactance module space. The second fan is arranged at the position, corresponding to the reactance module space, of the back plate. The second draught fan comprises a supporting frame connected with the back plate and a machine body installed on the supporting frame, and the included angle between the air outlet direction of the second draught fan and the air outlet direction of the first draught fan is an acute angle. According to the wind power converter provided by the embodiment of the invention, the smooth air channel is designed to communicate the interior of the power cabinet with the outside, the cooling and heat dissipation effects of power electronic equipment are improved, and the safety and reliability are improved.

Description

Technical Field

[0001] This application belongs to the technical field of wind power generation equipment, and particularly relates to a wind power converter. Background Art

[0002] For a wind turbine generator set, a wind power converter is one of the core components. A traditional wind power converter usually consists of a grid connection cabinet, a control cabinet, and a power cabinet. Each of the three uses an independent air duct to discharge the hot air in its own cabinet into the nacelle of the wind turbine generator set. When the power of the wind power converter is small, such a setting method will not have an obvious impact on the temperature in the nacelle. However, with the increasing trend of the power of the wind power converter, such a heat dissipation method will cause the temperature in the nacelle to rise sharply, resulting in a decline in the heat dissipation effect. At the same time, the internal components of the wind power converter in related technologies are arranged in a disorderly manner, which easily blocks the air ducts on the back of each cabinet, thereby affecting the circulation of the cooling air in the cabinet, further affecting the heat dissipation of the power electronic equipment in the cabinet, and ultimately affecting the operation of the power electronic equipment, and there are certain potential safety hazards. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a wind power converter with a smoother internal air duct, better cooling and heat dissipation effect of power electronic equipment, and better safety and reliability.

[0004] In a first aspect, an embodiment of this application provides a wind power converter, which includes a power cabinet having a first accommodation space. The power cabinet includes a partition and a back plate. The partition divides the first accommodation space into a power module space and a reactor module space. The power cabinet further includes a first fan and a second fan. The first fan is arranged on the partition and generates an air flow in the direction from the power module space to the reactor module space. The second fan is arranged at a position on the back plate corresponding to the reactor module space. The second fan includes a support frame connected to the back plate and a body installed on the support frame. The included angle between the air outlet direction of the second fan and the air outlet direction of the first fan is an acute angle.

[0005] According to an embodiment of the first aspect of this application, the support frame includes a mounting plate and two connecting plates. The two connecting plates are arranged at both ends of the mounting plate in the length direction. The mounting plate is connected to the back plate through the two connecting plates. The distance between one end of the mounting plate close to the power module space and the back plate is greater than the distance between the other end of the mounting plate away from the power module space and the back plate. The body is installed on the mounting plate.

[0006] According to an embodiment of the first aspect of this application, the number of the bodies is multiple, and the multiple bodies are arranged at intervals in sequence along the length direction of the mounting plate.

[0007] According to an embodiment of the first aspect of the present application, the back plate includes a plate body and a first air outlet guide frame, the first air outlet is arranged in the area of ​​the plate body corresponding to the reactance module space, the first air outlet guide frame is connected to the plate body and is arranged at the periphery of the first air outlet away from the reactance module space, and two connecting plates are connected to the first air outlet guide frame.

[0008] According to an embodiment of the first aspect of the present application, the first air outlet guide frame includes a plurality of straight plates and at least one inclined plate, and the plurality of straight plates and at least one inclined plate are connected end to end to form a ring structure, the plane where the straight plates are located is perpendicular to the plate body, and adjacent straight plates and the straight plates and the inclined plates are detachably connected; there is an angle between the plane where the inclined plates are located and the plane where the plate body is located, and the orthographic projection of the inclined plates onto the plate body does not overlap with the air outlet.

[0009] According to an embodiment of the first aspect of the present application, the angle between the plane where the inclined plate is located and the plane where the plate body is located is the same as the angle between the plane where the mounting plate is located and the plane where the plate body is located.

[0010] According to an embodiment of the first aspect of the present application, the number of inclined plates is 2.

[0011] According to an embodiment of the first aspect of the present application, the wind power converter also includes a grid-connected cabinet having a second accommodating space and a control cabinet having a third accommodating space, and a connecting hole is provided at one end of the grid-connected cabinet and the control cabinet, and the second accommodating space is connected with the third accommodating space through the connecting hole; a second air outlet is provided at one end of the grid-connected cabinet close to the connecting hole, and a plurality of first air inlets are provided at the other end of the grid-connected cabinet, a second air inlet is provided at one end of the control cabinet close to the first air inlet, a third fan for generating an airflow along the control cabinet toward the grid-connected cabinet is provided at the connecting hole, and a fourth fan for generating an airflow outward is provided at the second air outlet.

[0012] According to an embodiment of the first aspect of the present application, the number of the plurality of first air inlets is 6 to 12.

[0013] According to an embodiment of the first aspect of the present application, the power cabinet includes a vacuum contactor and a grid-side circuit breaker, the vacuum contactor and the grid-side circuit breaker are connected by a copper busbar, and the setting direction of the copper busbar is parallel to the direction of airflow generated by the fourth fan in the power cabinet.

[0014] The beneficial effects of the present application are as follows. By setting the second fan to include a support frame connected to the back panel and a body installed on the support frame, the included angle between the air outlet direction of the second fan and the air outlet direction of the first fan is an acute angle. That is, the first fan is used to convey the heat generated by the components working in the power module space to the reactor module space, and the second fan is used to discharge the heat generated by the components working in the reactor module space together with the heat transmitted from the power module space out of the power cabinet. The included angle between the air outlet direction of the second fan and the air outlet direction of the first fan being an acute angle can reduce the degree of interference between the air conveyed by the first fan and the air conveyed by the second fan, which is beneficial to the formation of the air duct in the power cabinet, reduces the possibility of the overall air duct heat dissipation efficiency of the power cabinet being reduced due to the mutual interference of the air conveyed by different fans, enables each power electronic device to work at a normal temperature, and has higher safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0016] Figure 1 is the front view of the wind power converter provided by the first aspect embodiment of the present application;

[0017] Figure 2 is the rear view of the wind power converter provided by the first aspect embodiment of the present application;

[0018] Figure 3 is the left view of the wind power converter provided by the first aspect embodiment of the present application;

[0019] Figure 4 is the top view of the wind power converter provided by the first aspect embodiment of the present application;

[0020] Figure 5 is the structural schematic diagram of the support frame in the wind power converter provided by the first aspect embodiment of the present application;

[0021] Figure 6 is the structural schematic diagram of the power cabinet in the wind power converter provided by the first aspect embodiment of the present application;

[0022] Figure 7 is the structural schematic diagram of the grid connection cabinet in the wind power converter provided by the first aspect embodiment of the present application.

[0023] In the figure, 100 is a wind power converter; 10 is a power cabinet; 11 is a partition; 12 is a back plate; 121 is a plate body part; 1211 is a first air outlet; 122 is a first air duct frame; 1221 is a straight plate; 1222 is an inclined plate; 13 is a first fan; 14 is a second fan; 141 is a support frame; 1411 is a mounting plate; 1412 is a connecting plate; 142 is a machine body; 15 is a second partition; 101 is a first accommodation space; 1011 is a power module space; 1012 is a reactor module space; 20 is a grid connection cabinet; 201 is a second accommodation space; 21 is a second air outlet; 22 is a first air inlet; 23 is a third fan; 24 is a fourth fan; 25 is a vacuum contactor; 26 is a grid side circuit breaker; 27 is a copper bar; 30 is a control cabinet; 301 is a third accommodation space; 31 is a second air inlet. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0026] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0027] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] The term "and / or" in the present application is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0029] The term "a plurality of" appearing in the present application refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0030] Figure 1 is the front view of the wind power converter provided by the embodiment of the first aspect of the present application; Figure 2 is the rear view of the wind power converter provided by the embodiment of the first aspect of the present application; Figure 3 is the left view of the wind power converter provided by the embodiment of the first aspect of the present application; Figure 4 is the top view of the wind power converter provided by the embodiment of the first aspect of the present application; Figure 5 is the structural schematic diagram of the support frame in the wind power converter provided by the embodiment of the first aspect of the present application; Figure 6 is the structural schematic diagram of the power cabinet in the wind power converter provided by the embodiment of the first aspect of the present application; Figure 7 is the structural schematic diagram of the grid connection cabinet in the wind power converter provided by the embodiment of the first aspect of the present application.

[0031] Such as Figures 1 to 7As shown in the figure, an embodiment of the present application provides a wind power converter 100, which includes a power cabinet 10 having a first accommodation space 101. The power cabinet 10 includes a partition 11 and a back panel 12. The partition 11 divides the first accommodation space 101 into a power module space 1011 and a reactor module space 1012. The power cabinet 10 further includes a first fan 13 and a second fan 14. The first fan 13 is disposed on the partition 11 and generates an air flow in the direction from the power module space 1011 to the reactor module space 1012. The second fan 14 is disposed at a position on the back panel 12 corresponding to the reactor module space 1012. The second fan 14 includes a support frame 141 connected to the back panel 12 and a body 142 mounted on the support frame 141. The included angle between the air outlet direction of the second fan 14 and the air outlet direction of the first fan 13 is an acute angle.

[0032] The wind power converter 100 is an indispensable part of a wind turbine generator set, and it mainly plays the role of converting wind energy into electrical energy. By adjusting the internal circuit, the wind power converter 100 can convert unstable wind energy into stable electrical energy to meet the requirements of the power grid. At the same time, the wind power converter 100 can also control the power factor and voltage of the wind power, improving the stability and reliability of the entire wind turbine generator set. In wind power generation, the performance of the wind power converter 100 directly affects the performance and efficiency of the entire wind power system.

[0033] The power cabinet 10 having the first accommodation space 101 means that the power cabinet 10 is an enclosed cabinet structure, which can at least function to accommodate the power module and the reactor module, providing a relatively stable, independent and stable working environment for the two, and the first accommodation space 101 can at least be used to accommodate the aforementioned power module and reactor module.

[0034] The power cabinet 10 includes a partition 11 and a back panel 12. The function of the partition 11 is to divide the first accommodation space 101 into two relatively independent sub-spaces, namely the power module space 1011 and the reactor module space 1012, so as to use the power module space 1011 to accommodate the aforementioned power module and the reactor module space 1012 to accommodate the aforementioned reactor module, making the working environments of the power module and the reactor module relatively independent and reducing the mutual interference between the two.

[0035] In these embodiments of the present application, the partition 11 can be set parallel to the horizontal plane so that the power module space 1011 and the reactance module space 1012 are relatively independent vertically. In some embodiments, the power cabinet 10 can also be provided with a second partition 15 spaced apart from the partition 11. Thus, the partition 11 and the second partition 15 form a sandwich structure. The air inlet of the first fan 13 is arranged on the side of the partition 11 close to the power module space 1011, and the air outlet of the first fan 13 is arranged on the side of the second partition 15 close to the reactance module space 1012. On the one hand, the structural stability of the first fan 13 can be strengthened, and on the other hand, a sandwich can be arranged between the power module space 1011 and the reactance module space 1012 to reduce the heat exchange efficiency between the two, thereby further reducing the influence of the heat generated in the reactance module space 1012 on the power module space 1011.

[0036] The first fan 13 is arranged on the partition 11 and generates an air flow in the direction from the power module space 1011 to the reactance module space 1012. A possible implementation is that the partition 11 is provided with a through hole communicating the power module space 1011 and the reactance module space 1012, the first fan 13 is arranged in the aforementioned through hole, and the wind direction generated by the first fan 13 is in the direction from the power module space 1011 to the reactance module space 1012.

[0037] The second fan 14 is arranged at the position of the back plate 12 corresponding to the reactance module space 1012. Here, the back plate 12 is the plate body part of the power cabinet 10 opposite to the cabinet door. In some embodiments, its function is to cooperate with the cabinet door, two side plates, the top plate and the bottom plate to jointly enclose a rectangular first accommodation space 101.

[0038] The second fan 14 is arranged at the position of the back plate 12 corresponding to the reactance module space 1012, which means that the second fan 14 is connected to the back plate 12 and is used to convey the air in the reactance module space 1012 to the outside of the cabinet, so as to generate an air flow in the reactance module space 1012 that can have heat exchange with the reactance module, and further keep the reactance module working in a suitable temperature field.

[0039] Exemplarily, the second fan 14 is connected to the back plate 12. A possible implementation is that the second fan 14 is fixedly connected to the back plate 12 to strengthen the structural consistency between the second fan 14 and the back plate 12. In some embodiments, the second fan 14 can also be detachably connected to the back plate 12 for subsequent maintenance or replacement of the second fan 14.

[0040] The second fan 14 includes a support frame 141 connected to the back plate 12 and a body 142 installed on the support frame 141. Among them, the role of the support frame 141 is to connect with the back plate 12 and provide support for the body 142. Exemplarily, the support frame 141 is connected to the back plate 12. A possible implementation manner is that the support frame 141 and the back plate 12 are detachably connected through connecting pieces such as screws and bolts.

[0041] The body 142 is a component in the second fan 14 that generates air flow. Exemplarily, in these embodiments of the present application, the body 142 can be set as an axial flow fan, and the first fan 13 is a centrifugal fan.

[0042] The included angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 is an acute angle. The purpose is to reduce the influence between the air flow generated by the second fan 14 and the air flow generated by the first fan 13, and improve the smoothness of the overall gas flow path in the power cabinet 10.

[0043] At the same time, in these embodiments of the present application, the air outlet of the power cabinet 10 can also be set to match the air outlet of the nacelle of the wind turbine generator set. That is, the cooperation of the first fan 13 and the second fan 14 can be directly used to directly transport the hot air generated in the power cabinet 10 to the outside of the wind turbine generator set, reducing the possibility of temperature change in the nacelle of the wind turbine generator set. In this way, it is required that the size of the air outlet of the power cabinet 10 matches the size of the air outlet of the nacelle, so that the air outlet of the power cabinet 10 (the air outlet direction of the second fan 14) is perpendicular to the direction of the air flow generated by the first fan 13. When the first fan 13 transports the hot air in the power module space 1011 to the reactor module space 1012, an air flow perpendicular or even opposite to the air outlet direction will be generated at the air outlet of the second fan 14, thereby reducing the air output of the second fan 14 and lowering the working efficiency of the second fan 14.

[0044] Based on this, by setting the included angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 to be an acute angle, the possibility of mutual influence between the two air flows can be reduced, and thus the heat exchange efficiency of the second fan 14 can be effectively improved.

[0045] According to the wind power converter 100 provided by the embodiment of the present application, by setting the second fan 14 to include a support frame 141 connected to the back plate 12 and a body 142 installed on the support frame 141, the included angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 is an acute angle. That is, the first fan 13 is used to convey the heat generated by the components working in the power module space 1011 to the reactor module space 1012, and the second fan 14 is used to discharge the heat generated by the components working in the reactor module space 1012 together with the heat transmitted from the power module space 1011 out of the power cabinet 10. The included angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 is an acute angle, which can reduce the degree of interference between the air conveyed by the first fan 13 and the air conveyed by the second fan 14, is beneficial to the formation of the air duct in the power cabinet 10, and reduces the possibility that the overall heat dissipation efficiency of the air duct in the power cabinet 10 is reduced due to the mutual interference of the air conveyed by different fans, enabling each power electronic device to work at a normal temperature and having higher safety and reliability.

[0046] According to an embodiment of the first aspect of the present application, the support frame 141 includes a mounting plate 1411 and two connecting plates 1412. The two connecting plates 1412 are arranged at both ends of the mounting plate 1411 in the length direction. The mounting plate 1411 is connected to the back plate 12 through the two connecting plates 1412; the distance between one end of the mounting plate 1411 close to the power module space 1011 and the back plate 12 is greater than the distance between the other end of the mounting plate 1411 away from the power module space 1011 and the back plate 12, and the body 142 is installed on the mounting plate 1411.

[0047] The body 142 is installed on the mounting plate 1411. A possible implementation manner is that the mounting plate 1411 is provided with through holes in the thickness direction, the body 142 is installed in the through holes of the mounting plate 1411, and the air inlet end of the body 142 is located on the side of the mounting plate 1411 in the thickness direction close to the reactor module space 1012, and the air outlet end of the body 142 is located on the side of the mounting plate 1411 in the thickness direction away from the reactor module space 1012.

[0048] In some embodiments, the mounting plate 1411 can be set as a rectangular plate body, the number of through holes on the mounting plate 1411 is multiple, and the multiple through holes are arranged at intervals in the length direction of the mounting plate 1411. Correspondingly, the number of the bodies 142 can be set as multiple, and one body 142 is installed in one through hole to enhance the intensity of the air flow generated by the second fan 14 and improve the heat exchange efficiency of the second fan 14.

[0049] Two connecting plates 1412 are arranged at both ends of the length direction of the mounting plate 1411, and the mounting plate 1411 is connected to the back plate 12 through the two connecting plates 1412. That is to say, the function of the connecting plate 1412 is to install the mounting plate 1411 on the back plate 12. At the same time, since it is necessary to control the angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 to be an acute angle, in these embodiments of the present application, the air outlet direction X of the second fan 14 can also be adjusted by adjusting the connection angle between the mounting plate 1411 and the connecting plate 1412.

[0050] The distance between one end of the mounting plate 1411 close to the power module space 1011 and the back plate 12 is greater than the distance between one end of the mounting plate 1411 away from the power module space 1011 and the back plate 12, which means that the end of the mounting plate 1411 close to the power module space 1011 is farther away from the back plate 12, so that after the body 142 is installed on the mounting plate 1411, the air outlet of the body 142 faces the ground, thereby making the angle between the air outlet direction X of the second fan 14 and the air outlet direction Y of the first fan 13 an acute angle.

[0051] In these embodiments of the present application, without changing the size of the air outlet of the power cabinet 10, by obliquely installing the body 142 to the mounting plate 1411 to change the air outlet direction X of the second fan 14, it is possible to ensure that while the subsequent air outlet of the power cabinet 10 is normally connected and installed with the air outlet of the cabin, the patency of the internal airway of the power cabinet 10 is improved, thereby effectively improving the heat exchange efficiency between the power cabinet 10 and the outside world, and achieving higher safety and reliability.

[0052] According to an embodiment of the first aspect of the present application, there are multiple bodies 142, and the multiple bodies 142 are arranged in sequence along the length direction of the mounting plate 1411 to increase the intensity of the airflow generated by the second fan 14 and improve the heat exchange efficiency of the second fan 14.

[0053] According to an embodiment of the first aspect of the present application, the back plate 12 includes a plate body 121 and a first air outlet guide frame 122. The first air outlet 1211 is arranged in the area of ​​the plate body 121 corresponding to the reactance module space 1012. The first air outlet guide frame 122 is connected to the plate body 121 and is arranged on the periphery of the first air outlet 1211 away from the reactance module space 1012. Two connecting plates 1412 are connected to the first air outlet guide frame 122.

[0054] The plate body 121 is the main structure of the back plate 12. The area of ​​the plate body 121 corresponding to the reactance module space 1012 is provided with a first air outlet 1211, which means that the reactance module space 1012 can communicate with the outside through the first air outlet 1211 provided on the plate body 121.

[0055] The first air outlet guide frame 122 can be regarded as a component sleeved on the periphery of the first air outlet 1211 and located outside the reactance module space 1012, and its function is to reduce the air flow exported from the first air outlet 1211, facilitating subsequent connection to the air outlet of the engine room. In these embodiments of the present application, a tarpaulin (not shown in the figure) can be provided at a section of the first air outlet guide frame 122 facing away from the reactance module space 1012. Among them, the tarpaulin can be a structure with openings at both ends, one end of which is sleeved on the first air outlet guide frame 122, and the other end communicates with the air outlet of the engine room. At this time, the heat dissipation path of the power cabinet 10 is as follows: the first fan 13 generates an incoming air flow perpendicular to the partition 11 to introduce the hot air generated in the power module space 1011 into the reactance module space 1012. At the same time, the second fan 14 generates an air flow with an acute angle to the air flow generated by the first fan 13, so as to introduce the two air flows together into the tarpaulin through the first air outlet 1211, and then discharge them to the atmosphere through the tarpaulin and the air outlet of the engine room. In this way, heat will not accumulate in the engine room, the heat exchange efficiency of the power cabinet 10 is improved, and the safety and reliability are higher.

[0056] It should be noted that, in these embodiments of the present application, the air inlet of the first fan 13 is arranged at the position of the power cabinet 10 corresponding to the power module space 1011, and the air inlet of the second fan 14 is arranged at the position of the power cabinet 10 corresponding to the reactance module space 1012. The two are independently cooled in a parallel form, and the hot air is discharged from the first air outlet 1211 after being collected.

[0057] The two connecting plates 1412 are connected to the first air outlet guide frame 122. A possible implementation method is that the two connecting plates 1412 are detachably connected to the first air outlet guide frame 122 respectively by using connecting pieces such as screws, bolts, and stud bolts; or, in some embodiments, it is also possible to set the two connecting plates 1412 to be detachably connected to the first air outlet guide frame 122 by using a snap connection method.

[0058] According to an embodiment of the first aspect of the present application, the first air outlet guide frame 122 includes a plurality of straight plates 1221 and at least one inclined plate 1222. The plurality of straight plates 1221 and the at least one inclined plate 1222 are connected end to end to form an annular structure. The plane where the straight plates 1221 are located is perpendicular to the plate body part 121, and the adjacent straight plates 1221 and the straight plates 1221 and the inclined plates 1222 are detachably connected; the plane where the inclined plates 1222 are located has an included angle with the plane where the plate body part 121 is located, and the orthographic projection of the inclined plates 1222 on the plate body part 121 does not overlap with the air outlet.

[0059] The first air outlet guide frame 122 has a structure with openings at both ends. After the first air outlet guide frame 122 is installed on the plate body part 121, one opening of the first air outlet guide frame 122 communicates with the first air outlet 1211, and the other end of the first air outlet guide frame 122 is used to sleeved with a tarpaulin or directly communicate with the air outlet of the engine room.

[0060] Based on this, in these embodiments of the present application, both the straight plate 1221 and the inclined plate 1222 are side plates in the first air outlet guide frame 122 for enclosing two ports, that is, a plurality of straight plates 1221 and at least one inclined plate 1222 are connected end to end to form an annular structure.

[0061] The plane where the straight plate 1221 is located is perpendicular to the plate body part 121, and the adjacent straight plates 1221 and between the straight plate 1221 and the inclined plate 1222 are detachably connected. In this way, during the installation or disassembly of the second fan 14, the first air outlet 1211 can be exposed by disassembling the straight plate 1221 or the inclined plate 1222, facilitating the installation of the second fan 14 by the operator.

[0062] The plane where the inclined plate 1222 is located has an angle with the plane where the plate body part 121 is located, and the orthographic projection of the inclined plate 1222 on the plate body part 121 does not overlap with the air outlet. In this way, the installation area of the second fan 14 at the first air outlet 1211 can be widened, further improving the convenience of installation and disassembly of the second fan 14, and reducing the possibility of damage to the second fan 14 during installation or disassembly.

[0063] At the same time, since the orthographic projection of the inclined plate 1222 on the plate body part 121 does not overlap with the air outlet, the possibility of the inclined plate 1222 affecting the air volume output of the second fan 14 can be reduced, improving the smoothness of the air output of the second fan 14, and further improving the working efficiency of the second fan 14.

[0064] According to an embodiment of the first aspect of the present application, the angle between the plane where the inclined plate 1222 is located and the plane where the plate body part 121 is located is the same as the angle between the plane where the mounting plate 1411 is located and the plane where the plate body part 121 is located.

[0065] In these embodiments of the present application, it means that the first air outlet guide frame 122 includes at least one inclined plate 1222, and the angle between the plane where the inclined plate 1222 is located and the plane where the plate body part 121 is located is equal to the angle between the plane where the mounting plate 1411 is located and the plane where the plate body part 121 is located. In this way, the second fan 14 can be installed or disassembled by disassembling the inclined plate 1222, and since the installation and disassembly angles of the second fan 14 are controlled to be the same as those of the inclined plate 1222, it is easier to put in or take out the second fan 14 through the hole exposed after disassembling the inclined plate 1222, improving the installation and disassembly efficiency of the power cabinet 10.

[0066] Exemplarily, in these embodiments of the present application, the inclined plate 1222 can be set as the plate structure in the first air outlet guide frame 122 that is away from the power module space 1011.

[0067] According to an embodiment of the first aspect of the present application, the number of the inclined plates 1222 is two. Thereby, the installation and disassembly efficiency of the power cabinet 10 can be further improved.

[0068] According to an embodiment of the first aspect of the present application, the wind power converter 100 further includes a grid connection cabinet 20 having a second accommodation space 201 and a control cabinet 30 having a third accommodation space 301. One end of the grid connection cabinet 20 and the control cabinet 30 is provided with a communication hole (not shown in the figure). The second accommodation space 201 and the third accommodation space 301 are communicated through the communication hole. One end of the grid connection cabinet 20 close to the communication hole is provided with a second air outlet 21, and the other end of the grid connection cabinet 20 is provided with a plurality of first air inlets 22. One end of the control cabinet 30 close to the first air inlets 22 is provided with a second air inlet 31. A third fan 23 for generating an air flow in the direction from the control cabinet 30 to the grid connection cabinet 20 is provided at the communication hole, and a fourth fan 24 for generating an air flow outward is provided at the second air outlet 21.

[0069] One end of the grid connection cabinet 20 and the control cabinet 30 is provided with a communication hole, which means that the grid connection cabinet 20 and the control cabinet 30 are communicated through the communication hole. A possible implementation manner is that the grid connection cabinet 20 and the control cabinet 30 are of an integral structure, and in this integral structure, there is a baffle that divides the integral structure into the aforementioned second accommodation space 201 and the third accommodation space 301, and the communication hole is opened on the baffle to communicate the second accommodation space 201 and the third accommodation space 301.

[0070] In these embodiments of the present application, it is equivalent to combining the air flow channels of the grid connection cabinet 20 and the control cabinet 30, canceling the original air outlet structure of the control cabinet 30, and instead using the third fan 23 to introduce the heat generated in the third accommodation space 301 into the second accommodation space 201, and using the fourth fan 24 to combine the heat generated in the second accommodation space 201 with the heat introduced into the second accommodation space 201, and uniformly discharging them from the second air outlet 21. The structure of the wind power converter 100 can be reduced, the production process of the control cabinet 30 can be reduced, and the production efficiency of the wind power converter 100 can be improved.

[0071] Correspondingly, in these embodiments of the present application, a second air outlet guide frame with the same structure and function as the first air outlet guide frame 122 can also be provided at the second air outlet 21, which will not be elaborated here.

[0072] According to an embodiment of the first aspect of the present application, the number of the plurality of first air inlets 22 is 6 to 12.

[0073] In these embodiments of the present application, by setting the number of the plurality of first air inlets 22 to be 6 to 12, compared with the related art, the number of the first air inlets 22 is increased, which is equivalent to increasing the air inlet area of the first air inlets 22. Furthermore, the wind speed when the air flows into the grid connection cabinet 20 is reduced, and the possibility of damage to the components in the grid connection cabinet 20 under the action of the cooling air is reduced.

[0074] Exemplarily, in these embodiments of the present application, the number of the first air inlets 22 can be set to 8, and the 8 first air inlets 22 are respectively arranged on the side walls of the grid connection cabinet 20, so as to realize omnidirectional air intake and reduce the possibility that all the plurality of first air inlets 22 are blocked.

[0075] It should be noted that in these embodiments of the present application, the reason for increasing the number of the first air inlets 22 is also that the integrated setting of the air ducts of the grid connection cabinet 20 and the control cabinet 30 can save the installation amount of a fan in their common structure. Furthermore, the redundant space in the grid connection cabinet 20 can be used to set more first air inlets 22, so as to further improve the safety and reliability of the wind power converter 100.

[0076] According to an embodiment of the first aspect of the present application, the grid connection cabinet 20 includes a vacuum contactor 25 and a line side circuit breaker 26. The vacuum contactor 25 and the line side circuit breaker 26 are connected by a copper busbar 27, and the arrangement direction of the copper busbar 27 is parallel to the direction of the air flow generated by the fourth fan 24 in the grid connection cabinet 20.

[0077] In these embodiments of the present application, by replacing two conventional air type stator contactors arranged side by side in the related art with a vacuum contactor 25, on the one hand, the number of copper busbars 27 between the stator contactor and the line side circuit breaker 26 can be further reduced, and the occupation of the space of the grid connection cabinet 20 can be further reduced. At the same time, on the other hand, the position of the vacuum contactor 25 can be adjusted in the more spacious grid connection cabinet 20 so that the copper busbar 27 between the vacuum contactor 25 and the line side circuit breaker 26 is arranged along the direction parallel to the air flow generated by the fourth fan 24. On the one hand, the number of copper busbars 27 is less, which can reduce the blockage of the air flow in the grid connection cabinet 20. On the other hand, the arrangement direction of the copper busbar 27 can be set parallel to the air flow direction generated by the fourth fan 24 in the grid connection cabinet 20, reducing the influence of the structure of the copper busbar 27 itself on the air flow, and the safety and reliability are higher.

[0078] It should be noted that in these embodiments of the present application, the air flow direction generated by the fourth fan 24 in the grid connection cabinet 20 does not refer to the air flow direction at the air outlet or air inlet of the fourth fan 24, but the air flow direction when the air flows in the grid connection cabinet 20. In these embodiments of the present application, since the first air inlet 22 of the grid connection cabinet 20 is provided at the lower end of the grid connection cabinet 20 and the second air outlet 21 is provided at the upper end of the grid connection cabinet 20, that is, the air flow direction generated by the fourth fan 24 in the grid connection cabinet 20 is parallel to the arrangement direction of the copper busbar 27, which can reduce the blockage of the copper busbar 27 to the air flow in the grid connection cabinet 20 and effectively improve the heat exchange efficiency in the grid connection cabinet 20.

[0079] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of protection of the present application is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.

[0080] One or more embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application shall be included within the scope of protection of the present application.

Claims

1. A wind power converter (100), comprising a power cabinet (10) having a first accommodation space (101), characterized in that: The power cabinet (10) comprises a partition (11) and a back plate (12), wherein the partition (11) divides the first accommodation space (101) into a power module space (1011) and a reactance module space (1012), and the power cabinet (10) further comprises a first fan (13) and a second fan (14), wherein the first fan (13) is arranged on the partition (11) and generates an airflow in a direction from the power module space (1011) to the reactance module space (1012), and the second fan (14) is arranged on the back plate (12) at a position corresponding to the reactance module space (1012); The second fan (14) comprises a support frame (141) connected to the back plate (12) and a body (142) mounted on the support frame (141); the angle between the air outlet direction of the second fan (14) and the air outlet direction of the first fan (13) is an acute angle.

2. The wind power converter (100) according to claim 1, characterized in that: The support frame (141) comprises a mounting plate (1411) and two connecting plates (1412), wherein the two connecting plates (1412) are arranged at two ends of the mounting plate (1411) in a length direction, and the mounting plate (1411) is connected to the back plate (12) via the two connecting plates (1412); The distance between one end of the mounting plate (1411) close to the power module space (1011) and the back plate (12) is greater than the distance between one end of the mounting plate (1411) away from the power module space (1011) and the back plate (12), and the body (142) is mounted on the mounting plate (1411).

3. The wind power converter (100) according to claim 2, characterized in that: There are multiple machine bodies (142), and the multiple machine bodies (142) are arranged in sequence and at intervals along the length direction of the mounting plate (1411).

4. The wind power converter (100) according to claim 2, characterized in that: The back plate (12) includes a plate body (121) and a first air outlet guide frame (122); a first air outlet (1211) is provided in an area of ​​the plate body (121) corresponding to the reactance module space (1012); the first air outlet guide frame (122) is connected to the plate body (121) and is provided at the periphery of the first air outlet (1211) on a side away from the reactance module space (1012); and the two connecting plates (1412) are connected to the first air outlet guide frame (122).

5. The wind power converter (100) according to claim 4, characterized in that: The first tuyere guide frame (122) comprises a plurality of straight plates (1221) and at least one inclined plate (1222); the plurality of straight plates (1221) and the at least one inclined plate (1222) are connected end to end to form a ring structure; the plane where the straight plates (1221) are located is perpendicular to the plate body (121); adjacent straight plates (1221) and the straight plates (1221) and the inclined plates (1222) are detachably connected; There is an angle between the plane where the inclined plate (1222) is located and the plane where the plate body (121) is located, and the orthographic projection of the inclined plate (1222) onto the plate body (121) does not overlap with the air outlet.

6. The wind power converter (100) according to claim 5, characterized in that: The angle between the plane where the inclined plate (1222) is located and the plane where the plate body (121) is located is the same as the angle between the plane where the mounting plate (1411) is located and the plane where the plate body (121) is located.

7. The wind power converter (100) according to claim 5, characterized in that: The number of the inclined plates (1222) is 2.

8. The wind power converter (100) according to claim 1, characterized in that: The wind power converter (100) further comprises a grid-connected cabinet (20) having a second accommodating space (201) and a control cabinet (30) having a third accommodating space (301), wherein one end of the grid-connected cabinet (20) and the control cabinet (30) is provided with a connecting hole, and the second accommodating space (201) and the third accommodating space (301) are connected through the connecting hole; The grid cabinet (20) is provided with a second air outlet (21) at one end close to the connecting hole, and a plurality of first air inlets (22) are provided at the other end of the grid cabinet (20); the control cabinet (30) is provided with a second air inlet at one end close to the first air inlet (22); a third fan (23) for generating an airflow along the control cabinet (30) toward the grid cabinet (20) is provided at the connecting hole; and a fourth fan (24) for generating an airflow outward is provided at the second air outlet (21).

9. The wind power converter (100) according to claim 8, characterized in that: The number of the first air inlets (22) is 6 to 12.

10. The wind power converter (100) according to claim 8, characterized in that: The grid-connected cabinet (20) comprises a vacuum contactor (25) and a grid-side circuit breaker (26); the vacuum contactor (25) and the grid-side circuit breaker (26) are connected via a copper busbar (27); the copper busbar (27) is arranged in a direction parallel to the direction of airflow generated by the fourth fan (24) in the grid-connected cabinet (20).

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