Connecting busbar and converter

Abstract

The utility model relates to the technical field of wind power generation, in particular to a connecting busbar and a converter. The connecting busbar comprises N laminated busbars which are sequentially arranged in the preset direction, every two adjacent laminated busbars are connected and insulated from each other, in every two adjacent laminated busbars, part of the area of one laminated busbar is arranged on part of the area of the other laminated busbar in an overlapped mode, and the number of the laminated busbars is N. Each laminated busbar comprises an input connection end and an output connection end which are arranged at intervals along a preset direction and are conducted. The connecting busbar is formed by connecting the N laminated busbars, so that the connecting busbar is flexible to use and convenient to maintain, and the size of the connecting busbar is effectively reduced. According to the converter provided by the invention, by applying the connecting busbar, the size of the converter is more compact, and the converter is convenient to maintain.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a connection busbar and converter. Background Technology

[0002] With the rapid development of wind power generation, the power density of converters is getting higher and higher. In addition, due to the overall layout of the OEM, the overall length of the converter can reach 4 to 5 meters. Therefore, the power modules in the converter can only be arranged sequentially along a predetermined direction.

[0003] In order to enable the power modules to be arranged in a straight line, the length of the traditional busbar is greatly increased, resulting in a large overall size of the busbar, which makes it inconvenient to use and maintain.

[0004] Therefore, there is an urgent need for a way to connect the busbar and the converter to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a connecting busbar and converter to reduce the overall size of the connecting busbar, making the connecting busbar flexible in use and easy to maintain.

[0006] To achieve this objective, the following technical solution is adopted in this application:

[0007] A connecting busbar includes N stacked busbars arranged sequentially along a preset direction. Two adjacent stacked busbars are connected and insulated from each other. In two adjacent stacked busbars, a portion of one stacked busbar is stacked on a portion of the other stacked busbar.

[0008] Each of the stacked busbars includes input connection terminals and output connection terminals that are spaced apart and connected along the preset direction.

[0009] Alternatively, the distance from the input connection terminal to the output connection terminal in each of the stacked busbars is of equal length.

[0010] As an optional solution, in two adjacent stacked busbars, the input connection terminal of one of the stacked busbars is a first input connection terminal, and the input connection terminal of the other stacked busbar is a second input connection terminal. The output connection terminal of one of the stacked busbars is a first output connection terminal, and the output connection terminal of the other stacked busbar is a second output connection terminal. The second input connection terminal is located between the first input connection terminal and the first output connection terminal.

[0011] As an optional solution, the connecting busbar further includes:

[0012] A first insulator, which is stacked on one of two adjacent stacked busbars; and

[0013] The first connecting bolt passes through two adjacent stacked busbars and is threadedly connected to the first insulator.

[0014] As an optional solution, each of the stacked busbars includes:

[0015] Multiple conductive bars are stacked along the thickness direction of the stacked busbar, and each conductive bar has a first receiving hole.

[0016] Insulating partitions, wherein each of the conductive bars has insulating partitions stacked on opposite sides along its thickness direction; and

[0017] The first insulating gasket is accommodated in each of the first receiving holes, and the first connecting bolt passes through the plurality of insulating partitions and the plurality of first insulating gaskets and is threadedly connected to the first insulator.

[0018] As an optional solution, each of the stacked busbars further includes:

[0019] The second insulating pad is stacked on the outer insulating partition, and the first connecting bolt passes through the second insulating pad.

[0020] As an optional solution, each of the stacked busbars includes:

[0021] Multiple conductive busbars are stacked along the thickness direction of the stacked busbar, and each conductive busbar extends outwardly with a connection pin, which forms the input connection terminal or the output connection terminal; and

[0022] An insulating partition is provided, with the insulating partition stacked on both sides of each conductive bar along its thickness direction.

[0023] As an optional solution, each of the conductive busbars is provided with a second receiving hole, and each of the stacked busbars further includes:

[0024] The third insulating pad is disposed in each of the second receiving holes;

[0025] A second insulator, which is stacked on one of the outer insulating partitions;

[0026] The second connecting bolt passes through a plurality of the insulating partitions and a plurality of the third insulating gaskets and is threadedly connected to the second insulator.

[0027] As an optional solution, each of the stacked busbars further includes:

[0028] The fourth insulating gasket is stacked on the outer insulating partition, and the second connecting bolt passes through the fourth insulating gasket.

[0029] As an optional solution, each of the stacked busbars further includes:

[0030] Each of the conductive busbars has a conductive post connected to one side along its thickness direction, and the end faces of each conductive post extending outward from the stacked busbar are flush with each other; and

[0031] A connecting nut is provided on the other side of each conductive bar along its thickness direction, and the connecting nut is directly opposite and penetrates the corresponding conductive post.

[0032] As an optional solution, the conductive busbar is provided with a first clearance position, which is used to allow the conductive post on other conductive busbars to pass through;

[0033] The insulating partition is provided with a second clearance position, which is used to allow the corresponding conductive post to pass through.

[0034] A converter includes N capacitor bank busbars. The converter also includes a connection busbar as described above. The N capacitor bank busbars are arranged sequentially along a preset direction. In two adjacent capacitor bank busbars, one capacitor bank busbar has two output terminals spaced apart, and the two output terminals are electrically connected to two corresponding input connection terminals. The other capacitor bank busbar has two input terminals spaced apart, and the two input terminals are electrically connected to two corresponding output connection terminals.

[0035] This application provides a connecting busbar, which comprises N stacked busbars arranged sequentially along a preset direction. Adjacent stacked busbars are connected and insulated from each other. Furthermore, in two adjacent stacked busbars, a portion of one stacked busbar overlaps a portion of the other, effectively reducing the overall size of the connecting busbar and thus making it more flexible in use and easier to maintain. This application also provides a converter that uses the aforementioned connecting busbar for AC / DC conversion, resulting in a more compact converter structure and easier maintenance. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the electrical connection between the connecting busbar and the capacitor bank busbar provided in the embodiments of this application specification;

[0037] Figure 2This is an exploded view of the connecting busbar structure provided in the embodiments of this application specification;

[0038] Figure 3 This is a structural cross-sectional view of the connecting busbar provided in the embodiments of this application specification;

[0039] Figure 4 This is an exploded view of the structure of one of the two stacked busbars arranged adjacently, as provided in the embodiments of this application specification.

[0040] Figure 5 This is an exploded view of the structure of another stacked busbar in one of the two adjacent stacked busbars provided in the embodiments of this application specification;

[0041] Figure 6 This is a schematic diagram of a stacked busbar provided in an embodiment of this application specification.

[0042] In the picture:

[0043] 100. Connecting busbar; 200. Capacitor cell busbar; 201. First output terminal; 202. Second output terminal; 203. First input terminal; 204. Second input terminal;

[0044] 1. Laminated busbar; 101. First input connection terminal; 102. First output connection terminal; 103. Second input connection terminal; 104. Second output connection terminal; 11. Conductive busbar; 111. First receiving hole; 112. Connecting pin; 113. Second receiving hole; 114. First clearance position; 12. Insulating partition; 121. Second clearance position; 122. Through hole; 13. First insulating gasket; 14. Second insulating gasket; 15. Third insulating gasket; 16. Second insulator; 17. Second connecting bolt; 18. Fourth insulating gasket; 19. Conductive post; 10. Connecting nut;

[0045] 2. First insulator; 3. First connecting bolt. Detailed Implementation

[0046] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0050] like Figure 1 As shown, this embodiment provides a converter, which includes a connecting bus 100 and N capacitor bank bus 200s. The N capacitor bank bus 200s are arranged sequentially along a predetermined direction. The connecting bus 100 is electrically connected to the N capacitor bank bus 200s to facilitate AC / DC conversion. It should be noted that in this embodiment, capacitor banks are electrically connected to the capacitor bank bus 200s, and crowbars are electrically connected to the connecting bus 100.

[0051] Optionally, in this embodiment, there are two capacitor bank busbars 200. In other embodiments, there may be four or more capacitor bank busbars 200, as long as N is an even number.

[0052] In order to achieve AC / DC conversion, the length of traditional busbars is greatly increased, resulting in a large overall size of the busbars, which makes them inconvenient to use and difficult to maintain on site.

[0053] To solve the above problems, such as Figure 1 and Figure 2 As shown, the connection busbar 100 provided in this embodiment includes N stacked busbars 1 arranged sequentially along a preset direction. Adjacent stacked busbars 1 are connected and insulated from each other. In two adjacent stacked busbars 1, a portion of one stacked busbar 1 is superimposed on a portion of the other stacked busbar 1. Each stacked busbar 1 includes input and output connection terminals arranged at intervals along the preset direction and connected to each other. The connection busbar 100 provided in this embodiment, by setting N stacked busbars 1 arranged sequentially along a preset direction, with adjacent stacked busbars 1 connected and insulated from each other, and with a portion of one stacked busbar 1 superimposed on a portion of the other stacked busbar 1, effectively reduces the overall size of the connection busbar 100, making it flexible to use and easy to maintain. It should be noted that in this embodiment, the preset direction is the direction marked in the figure, and this preset direction is the direction in which the N capacitor bank busbars 200 are arranged at intervals.

[0054] Optionally, in this embodiment, the connection between two adjacent stacked busbars 1 is detachable, which makes it easier to maintain the connecting busbar 100. In other embodiments, the connection between two adjacent stacked busbars 1 can also be fixed by adhesive or riveting, thereby ensuring the stability and reliability of the connection between the two adjacent stacked busbars 1.

[0055] Optionally, in this embodiment, the distances between the input connection terminal and the output connection terminal in each stacked busbar 1 are equal. Since each stacked busbar 1 includes input and output connection terminals arranged at intervals along a preset direction, when the connecting busbar 100 performs AC / DC commutation, the current flowing from the first capacitor bank busbar 200 to the input connection terminal of one of the stacked busbars 1 flows out through the output connection terminal of the stacked busbar 1 to the second capacitor bank busbar 200, thus forming a commutation path. The length of each commutation path on the connecting busbar 100 is the distance between the input and output connection terminals on the stacked busbar 1. Since the distance from the input connection terminal to the output connection terminal in each stacked busbar 1 is equal, the commutation paths formed by the connecting busbar 100 are short and of equal length, resulting in uniform commutation. This reduces stray inductance and ripple inductance between power modules, alleviates electromagnetic interference, and prevents excessively high local temperatures of the connecting busbar 100 from affecting commutation, thus ensuring the reliability of the connecting busbar 100. It should be noted that the number of stacked busbars 1 in the connecting busbar 100 is the same as the number of capacitor bank busbars 200. That is, in this embodiment, the connecting busbar 100 includes two stacked busbars 1 arranged sequentially along a preset direction.

[0056] In this embodiment, as Figure 1As shown, in two adjacent stacked busbars 1, one stacked busbar 1 has a first input connection terminal 101, and the other stacked busbar 1 has a second input connection terminal 103. One stacked busbar 1 has a first output connection terminal 102, and the other stacked busbar 1 has a second output connection terminal 104. The second input connection terminal 103 is located between the first input connection terminal 101 and the first output connection terminal 102. This arrangement of the two adjacent stacked busbars 1 facilitates the electrical connection between the connecting busbar 100 and each capacitor bank busbar 200, and also ensures that the commutation paths formed by the connecting busbars 100 are short and of equal length.

[0057] In this embodiment, as Figure 1 As shown, in two adjacent capacitor bank busbars 200, one capacitor bank busbar 200 has two output terminals spaced apart along a preset direction, and the two output terminals are electrically connected to the corresponding two input terminals respectively. The other capacitor bank busbar 200 has two input terminals spaced apart along a preset direction, and the two input terminals are electrically connected to the corresponding two output terminals respectively. Specifically, the two output terminals are the first output terminal 201 and the second output terminal 202, and the two input terminals are the first input terminal 203 and the second input terminal 204. The first output terminal 201 is electrically connected to the first input connection terminal 101, and the first output connection terminal 102 is electrically connected to the first input terminal 203. This allows the current on one capacitor bank bus 200 to flow into the other capacitor bank bus 200 after passing through the first output terminal 201, the first input connection terminal 101, the first output connection terminal 102, and the first input terminal 203 in sequence, thus forming a commutation path. The second output terminal 202 is electrically connected to the second input connection terminal 103, and the second output connection terminal 104 is electrically connected to the second input terminal 204. This allows the current on one capacitor bank bus 200 to flow into the other capacitor bank bus 200 after passing through the second output terminal 202, the second input connection terminal 103, the second output connection terminal 104, and the second input terminal 204 in sequence, thus forming another commutation path. This ensures that the two commutation paths are of equal length.

[0058] Optionally, in this embodiment, both the output terminal and the corresponding input connection terminal are designed as pins and electrically connected by bolts.

[0059] Optionally, in this embodiment, as Figure 2 and Figure 3As shown, the connecting busbar 100 also includes a first insulator 2 and a first connecting bolt 3. The first insulator 2 is stacked on one of two adjacent stacked busbars 1, and the first connecting bolt 3 passes through the two adjacent stacked busbars 1 sequentially and is threadedly connected to the first insulator 2. This configuration achieves a detachable insulating connection between two adjacent stacked busbars 1, and the structure is simple, facilitating installation and disassembly. Optionally, in this embodiment, the first insulator 2 has an internal thread to facilitate threaded connection with the first connecting bolt 3. Optionally, the end of the first insulator 2 furthest from the first connecting bolt 3 also has an internal thread, allowing the bolt to pass through the converter cabinet and threadedly connect to the first insulator 2, thereby achieving the installation and fixation of the connecting busbar 100 on the cabinet and ensuring the stability of the connecting busbar 100 installation. Optionally, in this embodiment, multiple first connecting bolts 3 are spaced apart along a preset direction, and each of the multiple first connecting bolts 3 corresponds to one of the multiple first insulators 2. The multiple first connecting bolts 3 and the multiple first insulators 2 are used together to achieve the installation and fixation of two adjacent stacked busbars 1, further ensuring the stability and reliability of the fixation between the two adjacent stacked busbars 1. Optionally, in this embodiment, four first connecting bolts 3 are spaced apart. In other embodiments, the specific number of first connecting bolts 3 can be set according to requirements.

[0060] Optionally, in this embodiment, as Figures 2-5 As shown, each stacked busbar 1 includes an insulating partition 12 and multiple conductive bars 11. The multiple conductive bars 11 are stacked along the thickness direction of the stacked busbar 1. Each conductive bar 11 extends outward with a connection pin 112, which forms an input connection terminal or an output connection terminal. Insulating partitions 12 are stacked on opposite sides of each conductive bar 11 along its thickness direction. This arrangement ensures that an insulating partition 12 is sandwiched between two adjacent conductive bars 11, guaranteeing insulation between conductive bars 11 of different polarities and meeting safety regulations. Furthermore, using the insulating partition 12 to insulate two adjacent conductive bars 11 eliminates the need for heat-pressing the insulating partition 12 compared to the traditional method of using an insulating film, significantly reducing processing costs. Optionally, in this embodiment, the insulating partition 12 can be made of fiberglass or epoxy resin. It should be noted that in this embodiment, each stacked busbar 1 includes three conductive busbars 11: one conductive busbar 11 is a positive conductive busbar, one conductive busbar 11 is a negative conductive busbar, and one conductive busbar 11 is an N-polar conductive busbar. Furthermore, it should be noted that each conductive busbar 11 is bent to form extended connection pins 112. The specific number of connection pins 112 on each conductive busbar 11 is set according to the polarity of that conductive busbar 11. Since the specific number of connection pins 112 on the conductive busbar 11 is prior art, it will not be described further here.

[0061] Optionally, in this embodiment, as Figures 2-5 As shown, each stacked busbar 1 also includes a first insulating gasket 13, and each conductive busbar 11 has a first receiving hole 111. Each first receiving hole 111 accommodates a first insulating gasket 13. The first connecting bolt 3 passes through multiple insulating partitions 12 and multiple first insulating gaskets 13 and is threadedly connected to the first insulator 2. By accommodating the first insulating gasket 13 in the first receiving hole 111 of the conductive busbar 11 to allow the first connecting bolt 3 to pass through, the creepage distance between conductive busbars 11 of different polarities is increased, thereby improving the stability and safety of electrical performance.

[0062] Optionally, in this embodiment, as Figures 2-5 As shown, each stacked busbar 1 also includes a second insulating gasket 14. The second insulating gasket 14 is stacked on the outer insulating partition 12, and the first connecting bolt 3 passes through the second insulating gasket 14. By setting the second insulating gasket 14, the tightness and reliability of the connection and fixation of the first connecting bolt 3 to the two stacked busbars 1 are further ensured.

[0063] In this embodiment, as Figure 2 , Figure 4 and Figure 5As shown, each conductive busbar 11 has a second receiving hole 113. Each stacked busbar 1 also includes a third insulating gasket 15, a second insulator 16, and a second connecting bolt 17. Each second receiving hole 113 accommodates a third insulating gasket 15. The second insulator 16 is stacked on one of the outer insulating partitions 12. The second connecting bolt 17 passes through multiple insulating partitions 12 and multiple third insulating gaskets 15 and is threadedly connected to the second insulator 16. By setting the second connecting bolt 17 and the second insulator 16, the stacking and fixing of each conductive busbar 11 and each insulating partition 12 in a single stacked busbar 1 is achieved, ensuring the stability of the stacking between each conductive busbar 11 and each insulating partition 12. Furthermore, the structure is simple, reducing processing costs. In addition, by accommodating the third insulating gasket 15 in the second receiving hole 113 of the conductive busbar 11 for the second connecting bolt 17 to pass through, the creepage distance between conductive busbars 11 of different polarities is increased, improving the stability and safety of electrical performance. Optionally, in this embodiment, the end of the second insulator 16 away from the second connecting bolt 17 is also provided with an internal thread, which facilitates the threaded connection between the bolt and the converter cabinet, further ensuring the stability of the connection busbar 100 on the cabinet. Optionally, in this embodiment, each stacked busbar 1 is provided with two second connecting bolts 17 and two second insulators 16 at intervals along a preset direction. The two second connecting bolts 17 and two second insulators 16 cooperate with each other to jointly realize the stacking and fixing between each conductive bar 11 and each insulating partition 12 in the stacked busbar 1. It should be noted that the connection position of the second connecting bolt 17 is located in the area of ​​the stacked busbar 1 that is not stacked with the adjacent stacked busbar 1, while the area of ​​the stacked busbar 1 that is stacked with the adjacent stacked busbar 1 is fixed by the first connecting bolt 3, ensuring the structural stability of the entire connection busbar 100. In other embodiments, the specific number of second connecting bolts 17 can be set according to requirements.

[0064] It should be noted that, as Figure 4 and Figure 5 As shown, each insulating partition 12 has a corresponding number of through holes 122, through holes 122 for the corresponding first connecting bolt 3 or second connecting bolt 17 to pass through.

[0065] Optionally, in this embodiment, as Figures 4-6 As shown, each stacked busbar 1 also includes a fourth insulating gasket 18. The fourth insulating gasket 18 is stacked on the outer insulating partition 12, and a second connecting bolt 17 passes through the fourth insulating gasket 18. By setting the fourth insulating gasket 18, the tightness and reliability of the second connecting bolt 17 in fixing each conductive busbar 11 and each insulating partition 12 in the stacked busbar 1 are further ensured.

[0066] Optionally, in this embodiment, as Figures 4-6 As shown, each stacked busbar 1 also includes a conductive post 19 and a connecting nut 10. Each conductive busbar 11 has a conductive post 19 connected to one side along its thickness direction, and the end faces of each conductive post 19 extending out of the stacked busbar 1 are flush. Each conductive busbar 11 has a connecting nut 10 connected to the other side along its thickness direction, with the connecting nut 10 directly opposite and connected to the corresponding conductive post 19. With this configuration, when the connecting busbar 100 is electrically connected to other devices, such as a crowbar, the flush end faces of each conductive post 19 extending out of the stacked busbar 1 facilitate the sequential threading of bolts through the crowbar's connection points and the connection of the conductive post 19 to the corresponding connecting nut 10. Compared to the traditional method of connecting the connecting busbar 100 to the crowbar via cables, this ensures consistent cable lengths when the connecting busbar 100 is electrically connected to the crowbar, thereby reducing the impact of ripple current. It should be noted that the specific number of conductive posts 19 on each conductive busbar 11 is set according to the polarity of the conductive busbar 11. Since the specific number of conductive posts 19 on the conductive busbar 11 is prior art, it will not be described in detail here. Optionally, in this embodiment, the connecting nut 10 can be welded to the corresponding conductive busbar 11, or the connecting nut 10 can be riveted to the corresponding conductive busbar 11. This embodiment does not specifically limit the specific installation method of the connecting nut 10.

[0067] Optionally, in this embodiment, as Figure 4 and Figure 5 As shown, the conductive busbar 11 is provided with a first clearance position 114, which allows conductive posts 19 on other conductive busbars 11 to pass through. The insulating partition 12 is provided with a second clearance position 121, which allows corresponding conductive posts 19 on the conductive busbar 11 to pass through. Optionally, in this embodiment, the first clearance position 114 can be designed as a clearance notch. In other embodiments, the first clearance position 114 can also be designed as a clearance hole, as long as the size of the clearance notch and clearance hole is much larger than the outer diameter of the conductive post 19. Optionally, in this embodiment, the second clearance position 121 can be designed as a clearance hole. In other embodiments, the second clearance position 121 can also be designed as a clearance notch, as long as the size of the clearance notch and clearance hole is much larger than the outer diameter of the conductive post 19.

[0068] The converter provided in this embodiment uses the aforementioned connecting bus 100 for AC / DC switching, which facilitates maintenance, ensures uniform switching, reduces stray inductance and ripple inductance between power modules, alleviates electromagnetic interference, and prevents excessively high local temperatures of the connecting bus 100 from affecting switching, thus ensuring the reliability of the converter operation.

[0069] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A connecting busbar, characterized in that The application relates to a connection bus, which comprises N laminated busbars (1) arranged in sequence along a preset direction, and adjacent two laminated busbars (1) are connected and mutually insulated, and part of one of the two adjacent laminated busbars (1) is overlapped on part of the other laminated busbar (1). Each laminated busbar (1) comprises input connection ends and output connection ends arranged at intervals and in conduction along the preset direction.

2. The busbar of claim 1, wherein The distance from the input connection end to the output connection end in each laminated busbar (1) is equal.

3. The busbar of claim 2, wherein, In the two adjacent laminated busbars (1), the input connection end of one laminated busbar (1) is a first input connection end (101), the input connection end of the other laminated busbar (1) is a second input connection end (103), the output connection end of one laminated busbar (1) is a first output connection end (102), and the output connection end of the other laminated busbar (1) is a second output connection end (104), and the second input connection end (103) is located between the first input connection end (101) and the first output connection end (102).

4. The busbar according to claim 2 or 3, characterized in that The connection bus further comprises: a first insulator (2) overlapped on one of the two adjacent laminated busbars (1); and a first connecting bolt (3) threadedly connected through the two adjacent laminated busbars (1) and the first insulator (2) in sequence.

5. The busbar of claim 4, wherein, Each laminated busbar (1) comprises: a plurality of conductive rows (11) overlapped along the thickness direction of the laminated busbar (1), and a first accommodating hole (111) is formed in each conductive row (11); an insulating partition plate (12) overlapped on the two opposite sides of each conductive row (11) along the thickness direction; and a first insulating gasket (13) accommodated in each first accommodating hole (111), and the first connecting bolt (3) is threadedly connected with the first insulator (2) through the plurality of insulating partition plates (12) and the plurality of first insulating gaskets (13).

6. The busbar of claim 5, wherein Each laminated busbar (1) further comprises: a second insulating gasket (14) overlapped on the insulating partition plate (12) on the outer side, and the first connecting bolt (3) is arranged in the second insulating gasket (14).

7. The busbar of claim 2 or 3, wherein Each laminated busbar (1) comprises: a plurality of conductive rows (11) overlapped along the thickness direction of the laminated busbar (1), and a connecting pin (112) is outwardly extended from each conductive row (11), and the connecting pin (112) forms the input connection end or the output connection end; and an insulating partition plate (12) overlapped on the two opposite sides of each conductive row (11) along the thickness direction.

8. The busbar of claim 7, wherein, Each of the conductive rows (11) is provided with a second accommodating hole (113), and each of the laminated busbars (1) further comprises: a third insulating gasket (15), one of the third insulating gaskets (15) is accommodated in each of the second accommodating holes (113); a second insulating sub (16), the second insulating sub (16) is stacked on one of the insulating partitions (12) on the outer side; a second connecting bolt (17), the second connecting bolt (17) is threadedly connected with the second insulating sub (16) through a plurality of the insulating partitions (12) and a plurality of the third insulating gaskets (15).

9. The busbar of claim 7, wherein, Each of the laminated busbars (1) further comprises: a conductive column (19), each of the conductive rows (11) is connected with the conductive column (19) on one side along the thickness direction, and each of the conductive columns (19) is flush with the end surface of the laminated busbar (1); and a connecting nut (10), each of the conductive rows (11) is connected with the connecting nut (10) on the other side along the thickness direction, and the connecting nut (10) is opposite to and penetrates through the corresponding conductive column (19).

10. The busbar of claim 9, wherein, The conductive row (11) is provided with a first avoiding position (114), and the first avoiding position (114) is used for the conductive column (19) on the other conductive row (11) to pass through; The insulating partition (12) is provided with a second avoiding position (121), and the second avoiding position (121) is used for the corresponding conductive column (19) to pass through.

11. A power converter comprising N capacitor bank busbars (200), characterized in that, The converter further comprises the connecting busbar according to any one of claims 1-10, N capacitor cell busbars (200) are arranged in the preset direction in sequence, two capacitor cell busbars (200) arranged adjacently, two output terminals are arranged on one of the capacitor cell busbars (200) in intervals, the two output terminals are electrically connected with two corresponding input connecting ends respectively, two input terminals are arranged on the other capacitor cell busbar (200) in intervals, and the two input terminals are electrically connected with two corresponding output connecting ends respectively.

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