Power cabinet and converter

Abstract

The utility model discloses a power cabinet and a converter, the power cabinet comprises a cabinet body, a power module, a grid connection assembly, a reactor assembly, a first heat dissipation assembly, a second heat dissipation assembly, an external control system and a crowbar assembly, and the cabinet body forms an internal device accommodating cavity and an external device accommodating cavity through a cabinet body sealing plate; the internal device containing cavity is provided with a first cavity, a second cavity and a third cavity which are independent of one another, a first air inlet and a first air outlet which are formed in the cabinet body are formed in the wall face of the second cavity, a second air inlet and a second air outlet which are formed in the cabinet body are formed in the wall face of the third cavity, and the crowbar assembly is arranged in the first cavity. The first heat dissipation assembly and the power module are arranged in the second cavity, the grid connection assembly, the reactor assembly and the two second heat dissipation assemblies are arranged in the third cavity, and the external control system is arranged in the external device containing cavity. According to the power cabinet provided by the embodiment of the invention, the cost can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical cabinets, and in particular to a power cabinet and a converter. Background Art

[0002] With the development of the wind power industry, the converter in the related technology generally includes two sub-cabinets, one of which is provided with a grid-connected component and a control system, and the other sub-cabinet is provided with a power module and a reactor.

[0003] However, the converter layout provided in the related art will cause space waste and increase economic costs. In addition, the grid-connected components and reactors in the converter provided in the related art need to be cooled, but the grid-connected components and reactors are respectively arranged in different sub-cabinets and share a cooling fan, which leads to a complex air duct path, easily causing local wind heat accumulation, and further resulting in a cooling dead zone. Utility Model Content

[0004] Based on the above problems, the present application provides a power cabinet and a converter, aiming to solve the problem of increased economic costs caused by space waste in the prior art, and the problem of heat dissipation dead zones caused by uneven heat dissipation.

[0005] The embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a power cabinet, including:

[0007] A cabinet, wherein the cabinet forms an internal device accommodating cavity and an external device accommodating cavity through a cabinet sealing plate, the internal device accommodating cavity has a first cavity, a second cavity and a third cavity which are independent of each other, the wall surface of the second cavity is provided with a first air inlet and a first air outlet, and the wall surface of the third cavity is provided with a second air inlet and a second air outlet;

[0008] A crowbar assembly disposed in the first cavity;

[0009] A first heat dissipation component and a power module are arranged in the second cavity;

[0010] A grid-connected component, a reactor component and two second heat dissipation components arranged in the third cavity;

[0011] An external control system is arranged in the external device accommodating cavity.

[0012] Optionally, the first cavity is located above the second cavity, the third cavity is located below the second cavity, the external device accommodating cavity is located on the front side of the cabinet, and the external device accommodating cavity is side by side with the second cavity.

[0013] Optionally, the first air inlet is located at a top end of the second cavity side wall, and the first air outlet is located at a bottom end of the second cavity side wall.

[0014] Optionally, the first heat dissipation component is located directly below the power module, and along the airflow direction, the first heat dissipation component is located downstream of the first air outlet.

[0015] Optionally, the second air inlet is located at the bottom end of the side wall of the third cavity, and the second air outlet is located at the top end of the side wall of the third cavity.

[0016] Optionally, two of the second heat dissipation components are respectively installed upstream of the second air inlet and upstream of the second air outlet.

[0017] Optionally, the third cavity forms a fifth cavity and a sixth cavity through vertical partitions;

[0018] A grid-connected component and a second heat dissipation component disposed in the fifth cavity;

[0019] A reactor component and a second heat dissipation component are arranged in the sixth cavity.

[0020] Optionally, the second air inlet is located at the bottom end of the fifth cavity side wall, the second air outlet is located at the top end of the sixth cavity side wall, and a heat dissipation mesh is provided on the vertical partition.

[0021] Optionally, the grid-connected component is installed on the vertical partition.

[0022] Optionally, the cabinet further includes a board-level control unit, which is disposed at the rear of the cabinet and is arranged in parallel with the power module.

[0023] Optionally, it further includes a cabinet door arranged on the front side of the cabinet body, the cabinet door is provided with a third air inlet and a fourth air inlet, the cabinet door is the back side relative to the side of the cabinet body, and the cabinet door is the front side opposite to the side of the cabinet body.

[0024] Optionally, the external control system is arranged on the back side of the cabinet door through a hinge.

[0025] Optionally, the third air inlet is located at a first position, the first position being a position corresponding to the first air inlet, and the fourth air inlet is located at the second position, the second position being a position corresponding to the second air inlet.

[0026] Optionally, the third air inlet and the fourth air inlet are respectively provided with a first protective structure.

[0027] Optionally, the first protective structure is a mesh member and filter cotton.

[0028] Optionally, the first air inlet, the second air inlet, the first air outlet and the second air outlet are respectively provided with a second protective structure.

[0029] Optionally, the second protective structure is a mesh member.

[0030] Optionally, the first heat dissipation component is a centrifugal fan.

[0031] Optionally, the second heat dissipation component is an axial flow fan.

[0032] Optionally, the power module includes two three-phase side modules and one three-phase grid side module.

[0033] Optionally, the reactor assembly includes two machine-side reactors and two grid-side reactors.

[0034] In a second aspect, an embodiment of the present application provides a converter, comprising a power cabinet, wherein the power cabinet is the power cabinet described in the first aspect.

[0035] Optionally, the converter is a wind power converter.

[0036] Compared with the prior art, this application has the following beneficial effects:

[0037] The power cabinet provided by the embodiment of the present application includes a cabinet, a power module, a grid-connected component, a reactor component, a first heat dissipation component, a second heat dissipation component, an external control system and a crowbar component. The cabinet forms an internal device accommodating cavity and an external device accommodating cavity through a cabinet sealing plate. The internal device accommodating cavity has a first cavity, a second cavity and a third cavity that are independent of each other, and the first air inlet and the first air outlet are arranged on the wall of the second cavity, the second air inlet and the second air outlet are arranged on the wall of the third cavity, the crowbar component is arranged in the first cavity, the first heat dissipation component and the power module are arranged in the second cavity, the grid-connected component, the reactor component and the two second heat dissipation components are arranged in the third cavity, and the external control system is arranged in the external device accommodating cavity. Among them, in the power cabinet provided by the embodiment of the present application, each component is integrated in a cabinet, which saves space and further saves costs. In addition, the present application also arranges the grid-connected component and the reactor component in the third cavity. On the basis of sharing the same group of second heat dissipation components, the air duct is no longer arranged to avoid heat dissipation dead zones and improve the safety of the power cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 A front view of a power cabinet provided in an embodiment of the present application;

[0040] Figure 2 A rear view of a power cabinet provided in an embodiment of the present application;

[0041] Figure 3 A left view of a power cabinet provided in an embodiment of the present application;

[0042] Figure 4 A three-dimensional structural diagram of a power cabinet with its door opened provided in an embodiment of the present application;

[0043] Figure 5 A three-dimensional structural diagram of a power cabinet door closed according to an embodiment of the present application;

[0044] Figure 6 A power cabinet provided in an embodiment of the present application includes a rear view of a rear door panel;

[0045] Figure 7 A schematic diagram of the airflow direction in a power cabinet provided in an embodiment of the present application.

[0046] in, Figure 1-7 middle:

[0047] 10-cabinet, 11-cabinet cover, 12-partition, 13-first cavity, 14-second cavity, 15-third cavity, 16-first air inlet, 17-second air inlet, 18-first air outlet, 19-second air inlet, 110-external device accommodating cavity, 111-vertical partition, 112-fifth cavity, 113-sixth cavity;

[0048] 201-first heat dissipation component, 202-second heat dissipation component;

[0049] 30-power module, 31-three-phase side module, 32-three-phase grid side module;

[0050] 40-grid-connected components, 41-copper busbar;

[0051] 50-reactor assembly, 51-machine side reactor, 52-grid side reactor;

[0052] 60-external control system, 61-board level control unit;

[0053] 70-crowbar assembly;

[0054] 80-cabinet door, 81-third air inlet, 82-fourth air inlet. DETAILED DESCRIPTION

[0055] As described above, in the research on power cabinets, it was found that the converter in the related art generally includes two sub-cabinets, one of which is provided with a grid-connected component and a control system, and the other sub-cabinet is provided with a power module and a reactor. That is, the converter provided in the related art is composed of two sub-cabinets.

[0056] However, the converter layout provided in the related art will cause space waste and increase economic costs. In addition, the grid-connected components and reactors in the converter provided in the related art need to be cooled, but the grid-connected components and reactors are respectively arranged in different sub-cabinets and share a cooling fan, which leads to a complex air duct path, easily causing local wind heat accumulation, and further resulting in a cooling dead zone.

[0057] In order to solve the above problems, an embodiment of the present application provides a power cabinet, including a cabinet body, a power module, a grid-connected component, a reactor component, a first heat dissipation component, a second heat dissipation component, an external control system and a crowbar assembly. The cabinet body forms an internal device accommodating cavity and an external device accommodating cavity through a cabinet body cover plate. The internal device accommodating cavity has a first cavity, a second cavity and a third cavity that are independent of each other. The first air inlet and the first air outlet are arranged on the wall of the second cavity, the second air inlet and the second air outlet are arranged on the wall of the third cavity, the crowbar assembly is arranged in the first cavity, the first heat dissipation component and the power module are arranged in the second cavity, the grid-connected component, the reactor component and the two second heat dissipation components are arranged in the third cavity, and the external control system is arranged in the external device accommodating cavity.

[0058] Thus, in the power cabinet provided by the embodiment of the present application, each component is integrated into a cabinet, which saves space and further saves costs. In addition, the present application also arranges both the grid-connected component and the reactor component in the third cavity, and on the basis of sharing the same set of second heat dissipation components, no air duct is provided, thereby avoiding heat dissipation dead zones and improving the safety of the power cabinet.

[0059] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] See also Figures 1 to 7 .

[0061] The power cabinet provided in the embodiment of the present application may include: a cabinet 10, the cabinet 10 forms an internal device accommodating cavity and an external device accommodating cavity 110 through a cabinet sealing plate 11, and the internal device accommodating cavity forms a first cavity 13, a second cavity 14 and a third cavity 15 through two partitions 12. Among them, in order to facilitate the inspection and maintenance of the components in the cabinet 10 in the later stage, the cabinet sealing plate 11 can be installed on the shell of the cabinet 10 through threaded fasteners. Specifically, the cabinet sealing plate 11 can be a metal plate or an insulating plate. Among them, the outer periphery of the two partitions 12 can be connected by bonding or integrated molding with the cabinet 10 shell. In addition, in order to facilitate the removal of the partition 12, the partition 12 can also be installed on the inner shell of the cabinet 10 through threaded fasteners. Specifically, the partition 12 can be a metal plate or an insulating plate. It should be noted that when the cabinet sealing plate 11 or the partition 12 is a metal plate, the cabinet sealing plate 11 or the partition 12 is spaced apart from other components in the cabinet 10 or connected through an insulating member.

[0062] In one possible implementation, when the cabinet 10 is arranged along the direction of gravity, the first cavity 13 is located above the second cavity 14, and the third cavity 15 is located below the second cavity 14. In another possible implementation, when the cabinet 10 is arranged along the vertical direction of gravity, the first cavity 13, the second cavity 14 and the third cavity are arranged in sequence from left to right or from right to left along the vertical direction of gravity.

[0063] The cabinet 10 is provided with a first air inlet 16 , a second air inlet 17 , a first air outlet 18 and a second air outlet 19 . The first air inlet 16 and the first air outlet 18 are arranged on the wall surface of the second cavity 14 , and the second air inlet 17 and the second air outlet 19 are arranged on the wall surface of the third cavity 15 .

[0064] In a possible implementation, the first air inlet 16, the second air inlet 17, the first air outlet 18 and the second air outlet 19 are respectively provided with a second protective structure. Preferably, the second protective structure is a mesh member.

[0065] The crowbar assembly 70 is disposed in the first cavity 13. In a possible implementation, the crowbar assembly 70 includes but is not limited to electrical components such as a crowbar control unit and a crowbar resistor. The electrical components included in the crowbar assembly in the related art are all within the protection scope of this application.

[0066] The first heat dissipation assembly 201 and the power module 30 are disposed in the second cavity 14. In some possible implementations, the power module 30 includes two three-phase side modules 31 and one three-phase grid side module 32.

[0067] The three-phase machine-side module 31 and the three-phase grid-side module 32 both reserve three-phase power outlets, which are connected to the three phases of the machine-side reactor 51 and the grid-side reactor 52 through cables.

[0068] The access between the machine side and the grid side adopts the down-line method, and the large line is connected to the copper bus 41 led out from the grid-connected component 40.

[0069] In a possible implementation, the first air inlet 16 is located at the top of the side wall of the second cavity 14, and the first air outlet 18 is located at the bottom of the side wall of the second cavity 14. Further preferably, the first heat dissipation component 201 is located directly below the power module 30, and the first heat dissipation component 201 is located downstream of the first air outlet 18 along the air flow direction. Preferably, the first heat dissipation component 201 can be a centrifugal fan. Figure 7 As shown in the air flow direction, when the first heat dissipation component 201 is working, cold air enters from the first air inlet 16 , passes through the power module 30 , and is discharged from the first air outlet 18 , thereby achieving the effect of dissipating heat for the power module 30 .

[0070] It should be understood that by separately setting up a first heat dissipation component 201 for the power module 30 to dissipate heat, the first heat dissipation component 201 is a centrifugal fan, and the working principle of the first heat dissipation component 201 is fully utilized, and cold air enters through the first air inlet 16, and the cold air exchanges heat with the heat generated by the power module 30 to form hot air, and the hot air is discharged through the first air outlet 18 via the first heat dissipation component 201, which is beneficial to the heat dissipation of the power module 30 and avoids the formation of a heat dissipation dead zone, which leads to heat accumulation.

[0071] The grid-connected component 40, the reactor component 50 and the two second heat dissipation components 202 are arranged in the third cavity 15. In a possible implementation, the reactor component 50 may include two machine-side reactors 51 and two grid-side reactors 52.

[0072] The machine-side reactor 51 and the two grid-side reactors 52 are both self-cooling reactors with relatively low heat dissipation requirements, and only need disturbed airflow.

[0073] In a possible implementation, the second air inlet 17 is located at the bottom end of the side wall of the third cavity 15, and the second air outlet 19 is located at the top end of the side wall of the third cavity 15. Further preferably, the two second heat dissipation components 202 are respectively installed upstream of the second air inlet 17 and upstream of the second air outlet 19. It should be understood that the second air inlet is located at the top end of the third cavity 15 as much as possible, making full use of the physical phenomenon of hot air rising, facilitating the heat dissipation of the grid-connected component 40 and the reactor component 50, and avoiding the formation of a dead zone in the air duct, which leads to heat accumulation.

[0074] In a possible implementation, the third cavity 15 forms a fifth cavity 112 and a sixth cavity 113 through a vertical partition 111, and the grid-connected component 40 and the second heat dissipation component 202 are arranged in the fifth cavity 112, and preferably the grid-connected component 40 is installed on the vertical partition 111. The reactor component 50 and the second heat dissipation component 202 are arranged in the sixth cavity 113.

[0075] Specifically, the second air inlet 17 is located at the bottom end of the side wall of the fifth cavity 112 , the second air outlet 19 is located at the top end of the side wall of the sixth cavity 113 , and heat dissipation mesh holes are provided on the vertical partition 111 .

[0076] It should be understood that the combination Figure 7 As shown in the airflow direction, the second heat dissipation component 202 located in the fifth cavity 112 is used to suck in the cold air from the second air inlet 17, and then perform the first heat exchange with the grid-connected component 40. The airflow after the first heat exchange flows to the sixth cavity 113 through the heat dissipation mesh provided in the vertical partition 111, and performs the second heat exchange with the reactor component 50. The hot air obtained through the second heat exchange is extracted through the second heat dissipation component 202 located in the sixth cavity 113.

[0077] The external control system 60 is disposed in the external device accommodating chamber 110. The external device accommodating chamber 110 is located on the front of the cabinet 10, and the external device accommodating chamber 110 is arranged side by side with the second chamber 14. Figure 7 As shown, the external device accommodating cavity 110 is located in the middle and lower part of the second cavity 14, and the external device accommodating cavity 110 is embedded in the second cavity 14. Further preferably, a heat dissipation mesh is provided on the cabinet cover plate 11 area corresponding to the external device accommodating cavity 110, and the other side of the heat dissipation mesh corresponds to the position of the first heat dissipation device 201. It should be understood that by providing a heat dissipation mesh on the cabinet cover plate 11, the first heat dissipation component 201 can extract the hot air generated by the external control system 60 when the external control system 60 is working, so as to achieve heat dissipation of the external control system 60.

[0078] In a possible implementation, the cabinet 10 further includes a board-level control unit 61, which is disposed at the rear of the cabinet 10 and is arranged in parallel with the power module 30. Figure 2 As shown, the board-level control unit 61 is disposed at the rear of the cabinet 10 , isolated from the second cavity 14 by a metal plate or an insulating plate, and the board-level control unit 61 is mounted on the metal plate or the insulating plate.

[0079] In one possible implementation, combining Figure 4As shown, the power cabinet further includes a cabinet door 80 disposed on the front of the cabinet body 10, and the cabinet door 80 is provided with a third air inlet 81 and a fourth air inlet 82. The side of the cabinet door 80 opposite to the cabinet body 10 is the back side of the cabinet door 80. The side of the cabinet door 80 opposite to the cabinet body 10 is the front side of the cabinet door 80 (as shown in FIG. Figure 5 shown).

[0080] In one possible implementation, combining Figure 4 As shown, the external control system 60 is also provided on the back of the cabinet door 80 through a hinge. The third air inlet 81 is located at a first position, which corresponds to the first air inlet 16, and the fourth air inlet 82 is located at a second position, which corresponds to the second air inlet 17. That is, when the cabinet door 80 is closed, cold air can pass through the third air inlet 81 and then enter the second cavity 14 through the first air inlet 16. Similarly, when the cabinet door 80 is closed, cold air can pass through the fourth air inlet 82 and then enter the third cavity through the second air inlet 17.

[0081] In a possible implementation, the second heat dissipation assembly 202 may also be installed on the cabinet door 80. Figure 4 As shown, when the cabinet door 80 is closed, the second heat dissipation assembly 202 can be embedded in the third cavity and located upstream of the second air inlet 17 to facilitate the inhalation of external cold air.

[0082] In a possible implementation, the third air inlet 81 and the fourth air inlet 82 are respectively provided with a first protective structure. Specifically, the first protective structure is a mesh member and filter cotton.

[0083] An embodiment of the present application further provides a converter, comprising a power cabinet, which is the power cabinet described in any of the above embodiments.

[0084] Specifically, the converter provided in the embodiment of the present application is a wind power converter.

[0085] It should be noted that the power cabinet provided in the embodiment of the present application can be used for small-power converters or converters of other power types, and is not limited here.

[0086] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0087] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of the present application are only used as name identifiers and do not represent the first or second in order.

[0088] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power cabinet, characterized in that: include: A cabinet (10), wherein the cabinet (10) forms an internal device accommodating cavity and an external device accommodating cavity (110) through a cabinet cover plate (11), the internal device accommodating cavity having a first cavity (13), a second cavity (14) and a third cavity (15) which are independent of each other, the wall surface of the second cavity (14) being provided with a first air inlet (16) and a first air outlet (18), and the wall surface of the third cavity (15) being provided with a second air inlet (17) and a second air outlet (19); A crowbar assembly (70) disposed in the first cavity (13); A first heat dissipation component (201) and a power module (30) arranged in the second cavity (14); A grid-connected component (40), a reactor component (50) and two second heat dissipation components (202) arranged in the third cavity (15); An external control system (60) is disposed in the external device accommodating chamber (110).

2. The power cabinet according to claim 1, characterized in that: The first cavity (13) is located above the second cavity (14), the third cavity (15) is located below the second cavity (14), the external device accommodating cavity (110) is located on the front side of the cabinet (10), and the external device accommodating cavity (110) is arranged side by side with the second cavity (14).

3. The power cabinet according to claim 2, characterized in that: The first air inlet (16) is located at the top end of the side wall of the second cavity (14), and the first air outlet (18) is located at the bottom end of the side wall of the second cavity (14).

4. The power cabinet according to claim 3, characterized in that: The first heat dissipation component (201) is located directly below the power module (30), and along the airflow direction, the first heat dissipation component (201) is located downstream of the first air outlet (18).

5. The power cabinet according to claim 2, characterized in that: The second air inlet (17) is located at the bottom end of the side wall of the third cavity (15), and the second air outlet (19) is located at the top end of the side wall of the third cavity (15).

6. The power cabinet according to claim 5, characterized in that: Along the airflow direction, the two second heat dissipation components (202) are respectively installed upstream of the second air inlet (17) and upstream of the second air outlet (19).

7. The power cabinet according to claim 1, characterized in that: The third cavity (15) forms a fifth cavity (112) and a sixth cavity (113) through a vertical partition (111); A grid-connected component (40) and a second heat dissipation component (202) disposed in the fifth cavity (112); A reactor component (50) and a second heat dissipation component (202) are arranged in the sixth cavity (113).

8. The power cabinet according to claim 7, characterized in that: The second air inlet (17) is located at the bottom end of the side wall of the fifth cavity (112), the second air outlet (19) is located at the top end of the side wall of the sixth cavity (113), and the vertical partition (111) is provided with a heat dissipation mesh.

9. The power cabinet according to claim 1, characterized in that: The cabinet (10) further comprises a board-level control unit (61), wherein the board-level control unit (61) is arranged at the rear of the cabinet (10), and the board-level control unit (61) is arranged in parallel with the power module (30).

10. The power cabinet according to any one of claims 1 to 9, characterized in that: It also comprises a cabinet door (80) arranged on the front side of the cabinet body (10), the cabinet door (80) being provided with a third air inlet (81) and a fourth air inlet (82), the side of the cabinet door (80) relative to the cabinet body (10) being the back side, and the side of the cabinet door (80) facing away from the cabinet body (10) being the front side.

11. The power cabinet according to claim 10, characterized in that: The third air inlet (81) is located at a first position, the first position being a position corresponding to the first air inlet (16), and the fourth air inlet (82) is located at a second position, the second position being a position corresponding to the second air inlet (17).

12. The power cabinet according to any one of claims 1 to 9, characterized in that: The first heat dissipation component (201) is a centrifugal fan, and the second heat dissipation component (202) is an axial flow fan.

13. The power cabinet according to any one of claims 1 to 9, characterized in that: The power module (30) comprises two three-phase side modules (31) and a three-phase grid side module (32).

14. The power cabinet according to any one of claims 1 to 9, characterized in that: The reactor assembly (50) comprises two machine-side reactors (51) and two grid-side reactors (52).

15. A converter, characterized in that: It comprises a power cabinet, and the power cabinet is the power cabinet according to any one of claims 1 to 14.

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