CN203851004U - A power unit structure for a wind power converter - Google Patents

Abstract

The utility model provides a power unit structure for a wind power current transformer; the power unit structure comprises a capacitor array, a water-cooled radiator, a power element IGBT and a driving assembly thereof arranged on a surface of the water-cooled radiator, and a lamination busbar; the capacitor array is fixed in a capacitor support; a cooling pipe is arranged in a bottom plate of the capacitor support; a first cooling plate is arranged on one side, connecting the water-cooled radiator, of the capacitor support; the first cooling plate connects a top plate of the capacitor support with the lamination busbar; a second cooling plate extending from the top plate of the capacitor support to the lamination busbar is arranged in a gap of the capacitor array; a third cooling plate is vertically arranged on the surface of the water-cooled radiator; the wind power current transformer has increased radiation area, thus improving heat radiation efficiency; the power unit structure is simple in structure, high in modularization level, good in radiation effect, and stable in performance.

Description

A power unit structure for a wind power converter

technical field

The utility model relates to the field of new energy power generation, in particular to a power unit structure for a wind power converter. the

Background technique

As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. my country is rich in wind energy resources. In recent years, national policies have also vigorously supported the wind power industry. The wind power converter is one of the key equipment for wind power generation. The power module components in it realize the conversion between AC and DC by controlling the on and off of the power components, and play the role of rectification and inverter. core part. In the wind power converter, the power unit part is a structure independent of the cabinet body, and the heating device and the power unit part in the cabinet complete heat exchange through circulating water, so as to achieve the purpose of heat dissipation. As the core of the wind power converter, the power unit is generally only designed to cool the IGBT module, and other components such as capacitors and busbars are not considered for heat dissipation due to their small heat generation relative to the IGBT module. However, in the actual operation of the wind farm, the site operating conditions are complex and changeable, and the structure of the wind tower and the converter is closed, so that the heat of the IGBT module cannot be completely taken away, and the heat generated inside the power unit gradually accumulates. At the same time, other components inside the power unit For example, laminated busbars and capacitors will also generate heat. When the heat accumulates to a certain extent, it will affect the performance of the DC support capacitor and even damage the device. High-power converters include an enormous number of capacitors and semiconductor devices, so cooling the entire converter is not an easy task. the

Utility model content

In view of the above problems, the purpose of this utility model is to provide a power unit structure for a wind power converter, including: a capacitor array, the capacitor array is fixed in a capacitor bracket; the capacitor bracket includes a top plate, a side wall and a bottom plate, and the top The wall, the side wall and the bottom plate define an internal space for accommodating the capacitor array; an opening for the capacitor array to pass through is provided on the top plate, and the bottom plate is a hollow plate structure, and the interior is filled with The cooling pipe of the coolant; the coolant is, for example, water, and the cooling pipe is arranged inside the bottom plate, which can reduce the temperature inside the capacitor bracket, and at the same time, each capacitor of the capacitor array is directly placed on the bottom plate, and the bottom plate The capacitor can be directly cooled to prevent the capacitor array from being overheated. the

A water-cooled radiator, which is fixedly connected to one side of the capacitor bracket, and is provided with a power element IGBT and its drive assembly on the surface;

And a laminated bus bar, which is respectively connected to the positive and negative poles of the capacitor array and the power element IGBT;

Wherein, the side of the capacitor support connected to the water-cooled radiator is provided with a first cooling plate, which is connected to the top plate of the capacitor support and the laminated busbar, and a cooling pipe is provided in the first cooling plate; The gap of the capacitor array is also provided with a second cooling plate extending from the top plate of the capacitor support to the laminated bus bar; a third cooling plate is arranged perpendicular to the surface of the water-cooled radiator, which extends to The laminated busbar. The setting of the first cooling plate can simultaneously absorb the heat released by the capacitor array and the power element IGBT and its driving components, and at the same time, because the first cooling plate connects the top plate of the capacitor bracket and the laminated bus row, which plays a role in making the laminated busbar, and prevents deformation of the laminated busbar caused by high temperature or other external forces. the

Preferably, there is at least one second cooling plate; the cooling pipe in it is connected to the water-cooling radiator through a three-way valve. The cooling pipe directly uses the cooling water of the water-cooled radiator, which reduces the arrangement of cables or pipes in the power unit structure, saves space, and improves the degree of modularization. the

Preferably, the cooling pipes inside the bottom plate of the capacitor bracket, the first cooling plate and the third cooling plate are arranged in an “S” shape, and are connected to the water-cooling radiator through a three-way valve. The cooling pipes are arranged in an "S" shape, which effectively increases the heat dissipation area and improves the heat dissipation efficiency. the

Preferably, the water cooling radiator is provided with a water inlet and a water outlet, which are respectively connected to a water inlet pipe and a water outlet pipe, and the cooling pipes are connected to each other and to the water inlet pipe of the water cooling radiator. the

Preferably, a casing is also included, and the capacitor array, the capacitor bracket, the water cooling radiator, the laminated busbar, the power element IGBT and its driving assembly are all arranged in the casing. the

Preferably, the capacitor bracket is located at one end of the casing and fixed inside the side wall of the casing, and the water-cooling radiator is arranged at the opposite end of the casing and fixed below the capacitor bracket. the

Preferably, a water outlet and a water inlet are provided on the wall of the housing, the water outlet and the water inlet are welded on the water-cooled radiator, extend out of the surface of the housing, and connect the water inlet pipe and outlet pipe. the

The power unit structure of the wind power converter described in the utility model arranges cooling pipes inside the bottom plate, which can reduce the temperature inside the capacitor bracket, and a cooling plate is arranged in the capacitor array gap to cool the capacitors, so as to avoid the excessive temperature of the capacitor arrays . The setting of the first cooling plate can simultaneously absorb the heat released by the capacitor array and the power element IGBT and its driving components, and at the same time, because the first cooling plate connects the top plate of the capacitor bracket and the laminated bus row, which plays a role in making the laminated busbar, and prevents deformation of the laminated busbar caused by high temperature or other external forces. The cooling pipe directly uses the cooling water of the water-cooled radiator, which reduces the arrangement of cables or pipes in the power unit structure, saves space, and improves the degree of modularization. The cooling pipes are arranged in an "S" shape, which effectively increases the heat dissipation area and improves the heat dissipation efficiency. The wind power converter described in the utility model has the advantages of simple structure, high degree of modularization, good heat dissipation effect and stable performance. the

Description of drawings

Fig. 1 is the structural representation of the wind power converter described in one of the embodiments of the utility model;

Fig. 2 is a schematic cross-sectional structure diagram of the first cooling plate, the second cooling plate and the third cooling plate of the wind power converter according to one embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a wind power converter according to one embodiment of the present invention. the

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description. the

Embodiment one,

As shown in Figure 1 and Figure 2, the power unit structure of the wind power converter described in the present invention includes: a capacitor array 100, and the capacitor array 100 is fixed in a capacitor bracket 200; the capacitor bracket 200 includes a top plate 201 and a bottom plate 202 And side walls, the top plate 201, the bottom plate 202 and the side walls define an internal space for accommodating the capacitor array 100; the top plate 201 is provided with an opening 203 for the capacitor array to pass through, the The bottom plate 202 is a hollow plate structure, and a cooling pipe 204 filled with a coolant is arranged inside; the coolant is, for example, water. the

A water-cooled radiator 300, which is fixedly connected to one side of the capacitor support 200, and is provided with a power element IGBT and its drive assembly 301 on the surface;

And a laminated bus bar 400, which is respectively connected to the positive and negative poles of the capacitor array 100 and the power element IGBT301;

Wherein, the side of the capacitor bracket 200 connected to the water-cooled radiator 300 is provided with a first cooling plate 500, which connects the top plate 201 of the capacitor bracket 200 and the stacked busbar 400, and the first cooling plate 500 is provided with a cooling pipe 204; the gap between the capacitor array 100 is also provided with a second cooling plate 600, one end of the second cooling plate 600 is connected to the top plate 201 of the capacitor bracket 200, and the other end is connected and supported The laminated busbar 400; the second cooling plate 600 is at least one; the cooling pipe 204 in it is connected to the water-cooling radiator 300 through a three-way valve. The second cooling plate 600 supports the laminated busbar 400 . the

A third cooling plate 700 perpendicular to the surface of the water cooling radiator 300 is also provided on the surface of the water cooling radiator 300 , and a free end of the third cooling plate 700 supports the laminated bus bar 400 . the

The cooling pipes 204 inside the bottom plate of the capacitor bracket, the first cooling plate and the third cooling plate are arranged in an “S” shape, and are connected to the water-cooling radiator 300 through a three-way valve. the

The water-cooling radiator 300 is provided with a water inlet 302 and a water outlet 303, which are respectively connected to a water inlet pipe and a water outlet pipe. The cooling pipes 204 are connected to each other and to the water inlet pipe of the water-cooling radiator. the

The wind power converter of the present utility model also includes a housing, the capacitor array 100, the capacitor bracket 200, the water-cooled radiator 300, the laminated busbar 400, the power element IGBT and its drive assembly 301 are all set in the housing. The capacitor bracket 200 is located at one end of the housing and fixed inside the side wall of the housing, and the water-cooling radiator 300 is disposed at the opposite end of the housing and fixed below the capacitor bracket 200 . The wall of the housing is provided with a water outlet and a water inlet, the water outlet and the water inlet are welded on the water-cooled radiator 300, extend out of the surface of the housing, and connect the water inlet pipe and the water outlet pipe . the

Example two

As shown in Fig. 2 and Fig. 3, the power unit structure of the wind power converter described in the present invention includes: a capacitor array 100, and the capacitor array 100 is fixed in a capacitor bracket 200; the capacitor bracket 200 includes a top plate 201 and a bottom plate 202 And side walls, the top plate 201, the bottom plate 202 and the side walls define an internal space for accommodating the capacitor array 100; the top plate 201 is provided with an opening 203 for the capacitor array to pass through, the The bottom plate 202 is a hollow plate structure, and the inside is provided with a cooling pipe 204 filled with a coolant; the coolant is, for example, water. the

A water-cooled radiator 300, which is fixedly connected to one side of the capacitor support 200, and is provided with a power element IGBT and its drive assembly 301 on the surface;

And a laminated bus bar 400, which is respectively connected to the positive and negative poles of the capacitor array 100 and the power element IGBT301;

Wherein, the side of the capacitor bracket 200 connected to the water-cooled radiator 300 is provided with a first cooling plate 500, which connects the top plate 201 of the capacitor bracket 200 and the stacked busbar 400, and the first cooling plate 500 is provided with a cooling pipe 204; the gap between the capacitor array 100 is also provided with a second cooling plate 600, one end of the second cooling plate 600 is connected to the top plate 201 of the capacitor bracket 200, and the other end is connected and supported The laminated busbar 400; the second cooling plate 600 is at least one; the cooling pipe 204 in it is connected to the water-cooling radiator 300 through a three-way valve. The second cooling plate 600 supports the laminated busbar 400 . The capacitor support 200 is a shell with openings at both ends, and its side wall is a hollow plate structure. the

A third cooling plate 700 perpendicular to the surface of the water cooling radiator 300 is also provided on the surface of the water cooling radiator 300 , and a free end of the third cooling plate 700 supports the laminated bus bar 400 . the

The bottom plate of the capacitor bracket, the first cooling plate, and the third cooling plate are provided with a plate-shaped structure with passages inside, and the cooling pipe 204 is arranged in the passage, and is connected to the water-cooled heat dissipation device through a three-way valve. device 300. the

The water-cooling radiator 300 is provided with a water inlet 302 and a water outlet 303, which are respectively connected to a water inlet pipe and a water outlet pipe. The cooling pipes 204 are connected to each other and to the water inlet pipe of the water-cooling radiator. the

Although the embodiment of the present utility model has been disclosed as above, it is not limited to the use listed in the description and the implementation, and it can be applied to various fields suitable for the present utility model. For those familiar with the art, Further modifications can be readily effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents. the

Claims (7)

1. A power unit structure for a wind power converter, characterized in that it comprises: A capacitor array, the capacitor array is fixed in the capacitor bracket; the capacitor bracket includes a top plate, a side wall and a bottom plate, and the top plate, the side wall and the bottom plate define an internal space for accommodating the capacitor array; in the The top plate is provided with an opening for the passage of the capacitor array, the bottom plate is a hollow plate structure, and a cooling pipe filled with a coolant is arranged inside; A water-cooled radiator, which is fixedly connected to one side of the capacitor bracket, and is provided with a power element IGBT and its drive assembly on the surface; Laminated busbars, which are respectively connected to the positive and negative poles of the capacitor array and the power element IGBT; Wherein, the side of the capacitor support connected to the water-cooled radiator is provided with a first cooling plate, which is connected to the top plate of the capacitor support and the laminated busbar, and a cooling pipe is provided in the first cooling plate; The gap of the capacitor array is also provided with a second cooling plate extending from the top plate of the capacitor support to the laminated bus bar; A third cooling plate is arranged perpendicular to the surface of the water-cooling radiator, which extends to the laminated bus bar. the 2. The power unit structure for a wind power converter according to claim 1, wherein there is at least one second cooling plate; the cooling pipe in it is connected to the water cooling radiator through a three-way valve for water cooling and heat dissipation device. the 3. The power unit structure for a wind power converter according to claim 1 or 2, wherein the cooling pipes inside the capacitor support bottom plate, the first cooling plate, and the third cooling plate are in the form of "S" type arrangement, and connected to the water-cooled radiator through a three-way valve. the 4. The power unit structure for a wind power converter according to claim 1, wherein the water-cooled radiator is provided with a water inlet and a water outlet, which are respectively connected to a water inlet pipe and a water outlet pipe, and the cooling pipes are connected to each other and be connected to the water inlet pipe of the water-cooled radiator. the 5. The power unit structure for a wind power converter according to claim 1, further comprising a housing, the capacitor array, the capacitor bracket, the water-cooled radiator, the laminated busbar and the The power element IGBT and its driving components are all arranged in the casing. the 6. The power unit structure for a wind power converter as claimed in claim 5, wherein the capacitor bracket is located at one end of the housing and is fixed on the inside of the side wall of the housing, and the water-cooled radiator is arranged on the housing side wall. The opposite end in the housing is fixed below the capacitor bracket. the 7. The power unit structure for a wind power converter according to claim 5, wherein a water outlet and a water inlet are arranged on the wall of the housing, and the water outlet and the water inlet are welded on the water-cooled The radiator extends out of the surface of the housing to connect the water inlet pipe and the water outlet pipe. the