Converter

Abstract

The embodiment of the utility model relates to the technical field of wind power generation, in particular to a converter. The converter provided by the embodiment of the specification comprises a direct-current connection busbar, N capacitor pool busbars, N crowbar modules and a plurality of switching busbars, the N capacitor pool busbars are sequentially arranged along a preset direction, the N capacitor pool busbars are electrically connected with the direct-current connection busbar, each crowbar module comprises two crowbars sequentially arranged along the preset direction, and the crowbar modules are electrically connected with the switching busbars. The multiple switching busbars are the same in size, and each crowbar is electrically connected with the direct-current connection busbar through the switching busbar. According to the converter provided by the embodiment of the specification, the crowbar is electrically connected with the direct-current connecting busbar by adopting the switching busbars, and the switching busbars are the same in size, so that stray inductance generated by a circuit is reduced, the influence of ripple current is reduced, the impact force of the ripple current on the switching busbars is further reduced, and the service life of the converter is prolonged. And the working reliability of the converter is ensured.

Description

Technical Field

[0001] This specification relates to the field of wind power generation technology, and more particularly to a converter. Background Technology

[0002] As the installed capacity of wind turbines continues to increase, their proportion in the power grid is growing, leading to a higher frequency of grid dip-slip faults. This can cause wind turbines to disconnect from the grid and shut down. When wind turbines disconnect from the grid, they cannot effectively provide voltage and frequency support to the grid, resulting in damage to the converters. New grid regulations require wind power grid-connected systems to have low-voltage ride-through capability. Currently, a common solution for wind power converters is to add crowbars to the DC side to improve the fault ride-through capability and adaptability of the wind turbines.

[0003] In related technologies, crowbars are mostly connected to DC busbars via cables, which can easily lead to stray inductance in the circuit, thereby reducing the reliability of the entire converter.

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

[0005] The purpose of this specification is to provide a converter that reduces stray inductance generated by the circuit, reduces the impact of ripple current, reduces the impact force of ripple current on the transfer busbar, and ensures the reliability of converter operation.

[0006] To achieve this objective, the embodiments in this specification adopt the following technical solutions:

[0007] A converter, comprising:

[0008] N capacitor bank busbars are arranged sequentially along a preset direction;

[0009] A DC connection busbar is provided, and all N capacitor bank busbars are electrically connected to the DC connection busbar.

[0010] N pry bar modules, each pry bar module including two pry bars arranged sequentially along the preset direction; and

[0011] Multiple adapter busbars, all of which are identical in size, and each of the crowbars is electrically connected to the DC connection busbar via the adapter busbars.

[0012] As an optional solution, the DC connection busbar includes N stacked busbars arranged sequentially along the preset direction. The two adjacent stacked busbars are insulated from each other, and in the two adjacent stacked busbars, a portion of one stacked busbar is stacked on a portion of the other stacked busbar. Each stacked busbar is electrically connected to the crowbar module.

[0013] Each of the stacked busbars includes an input connection terminal and an output connection terminal that are spaced apart along the preset direction and are interconnected. Two adjacent capacitor bank busbars are electrically connected through the stacked busbars.

[0014] As an option, two adjacent stacked busbars can be detachably connected.

[0015] Alternatively, the distance from the input connection terminal to the output connection terminal in each of the stacked busbars is of equal length.

[0016] As an optional solution, in two adjacent stacked busbars, one of the stacked busbars has a first input connection terminal and a first output connection terminal, and the other stacked busbar has a second input connection terminal and a second output connection terminal, with the second input connection terminal located between the first input connection terminal and the first output connection terminal;

[0017] In two adjacent pry bar modules, one of the pry bars in one pry bar module is located between the two pry bars in the other pry bar module.

[0018] As an optional solution, the adapter busbar includes a first connecting part and a second connecting part connected to each other, the first connecting part and the second connecting part being connected at an angle, the first connecting part being electrically connected to the stacked busbar, and the second connecting part being electrically connected to the crowbar.

[0019] As an optional solution, the first connecting portion is provided with a first mounting hole, and each of the stacked busbars includes:

[0020] Multiple conductive busbars, wherein the multiple conductive busbars are stacked along the thickness direction of the stacked busbar;

[0021] An insulating partition is provided, wherein each of the conductive bars has an insulating partition stacked on opposite sides along its thickness direction;

[0022] Each of the conductive busbars is connected to one side along its thickness direction, and the end face of each conductive post extending out of the DC connection busbar is flush with the end face of the busbar. The first connection part abuts against the end face of the corresponding conductive post.

[0023] A first connecting nut is connected to the other side of each conductive bar along its thickness direction, and the first connecting nut is directly opposite and penetrates the corresponding conductive post; and

[0024] The first connecting bolt passes through the first mounting hole and the conductive post in sequence and is threadedly connected to the first connecting nut.

[0025] 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;

[0026] The insulating partition is provided with a second clearance position, which is used to allow the corresponding conductive post to pass through.

[0027] Alternatively, each of the conductive bars may have an outwardly extending connection pin, which forms either the input connection terminal or the output connection terminal.

[0028] As an optional solution, the second connection portion is provided with an insulating mounting hole, and the converter further includes:

[0029] The first insulator is embedded in the mounting plate of the crowbar;

[0030] The second connecting bolt passes through the insulating mounting hole and is threadedly connected to the first insulator.

[0031] As an optional solution, the second connection portion is provided with a second mounting hole, and the converter further includes:

[0032] The second connecting nut is embedded in the terminal of the pry bar;

[0033] The third connecting bolt passes through the second mounting hole and is threadedly connected to the second connecting nut.

[0034] As an optional solution, the DC connection busbar further includes:

[0035] A second insulator, which is stacked on one of two adjacent stacked busbars; and

[0036] The fourth connecting bolt passes through two adjacent stacked busbars and is threadedly connected to the second insulator.

[0037] This specification provides an embodiment of a converter, which includes a DC connection busbar, N capacitor bank busbars, N crowbar modules, and multiple transition busbars. The N capacitor bank busbars are arranged sequentially along a predetermined direction and are all electrically connected to the DC connection busbar. Each crowbar module includes two crowbars arranged sequentially along the predetermined direction. The multiple transition busbars are of the same size, and each crowbar is electrically connected to the DC connection busbar via a transition busbar. The converter provided in this specification uses transition busbars to electrically connect the crowbars to the DC connection busbar. Since each transition busbar is of the same size, the current path between each crowbar and the DC connection busbar is equal, thereby reducing stray inductance generated in the circuit, reducing the impact of ripple current, and further reducing the impact force of ripple current on the transition busbar, ensuring the reliability of the converter operation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the converter structure provided in the embodiments of this specification;

[0039] Figure 2 This is a first partial structural diagram of the converter provided in the embodiments of this specification;

[0040] Figure 3 This is a schematic diagram of a second partial structure of the converter provided in the embodiments of this specification;

[0041] Figure 4 This is a schematic diagram of the structure of the DC connection busbar provided in the embodiments of this specification;

[0042] Figure 5 This is an exploded view of the DC connection busbar provided in the embodiments of this specification;

[0043] Figure 6 This is a schematic diagram of the structure of the adapter busbar provided in the embodiments of this specification;

[0044] Figure 7 This is a partial structural cross-sectional view of the converter provided in the embodiments of this specification;

[0045] Figure 8 yes Figure 7 Enlarged view of the structure at point A in the middle;

[0046] Figure 9 yes Figure 7 Enlarged view of the structure at point B.

[0047] In the picture:

[0048] 1. Capacitor bank busbar; 101. First output terminal; 102. Second output terminal; 103. First input terminal; 104. Second input terminal;

[0049] 2. DC connection busbar; 201. First input connection terminal; 202. First output connection terminal; 203. Second input connection terminal; 204. Second output connection terminal; 21. Laminated busbar; 211. Conductive busbar; 2111. First clearance position; 2112. Connection pin; 212. Insulating partition; 2121. Second clearance position; 213. Conductive post; 214. First connecting nut; 215. First connecting bolt; 22. Second insulator; 23. Fourth connecting bolt;

[0050] 3. Pry bar module; 31. Pry bar; 311. Mounting plate; 312. Wiring terminal;

[0051] 4. Adapter busbar; 41. First connection part; 411. First mounting hole; 42. Second connection part; 421. Insulation mounting hole; 422. Second mounting hole;

[0052] 5. First insulator; 6. Second connecting bolt; 7. Second connecting nut; 8. Power module. Detailed Implementation

[0053] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the embodiments of this specification clearer, the technical solutions of the embodiments of this specification will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0054] In the description of the embodiments in this specification, 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 the embodiments of this specification based on the specific circumstances.

[0055] In the embodiments of this specification, 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.

[0056] 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 the embodiments of this specification. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0057] like Figure 1 As shown, this embodiment provides a converter, which includes a DC connection busbar 2, N capacitor bank busbars 1, and N crowbar modules 3. The N capacitor bank busbars 1 are arranged sequentially along a preset direction and are all electrically connected to the DC connection busbar 2 to facilitate AC / DC conversion. Each crowbar module 3 includes two crowbars 31 arranged sequentially along the preset direction, and each crowbar 31 is electrically connected to the DC connection busbar 2. By electrically connecting the crowbars 31 to the DC connection busbar 2, circuit protection is improved, and the fault ride-through capability and adaptability of the wind turbine are enhanced. It should be noted that in this embodiment, the converter also includes multiple power modules 8, and each capacitor bank busbar 1 is electrically connected to a power module 8. It should also be noted that in this embodiment, the preset direction is the extension direction of the DC connection busbar 2.

[0058] Optionally, in this embodiment, there are two capacitor bank busbars 1. In other embodiments, there may be four or more capacitor bank busbars 1, as long as N is an even number.

[0059] In related technologies, the crowbar 31 is mostly connected to the DC busbar 2 via a cable. During the wiring process, the cable length is often inconsistent, which leads to differences in the parasitic parameters of each phase of the circuit. This causes stray inductance in the circuit and increases the impact of ripple current. The large current brought by the ripple current can easily bring a large impact force to the cable, thereby reducing the reliability of the entire converter.

[0060] To solve the above problems, such as Figure 1 and Figure 2 As shown, the converter provided in this embodiment also includes multiple transition buses 4, all of which are of the same size. Each crowbar 31 is electrically connected to the DC connection busbar 2 via the transition busbar 4. The converter provided in this embodiment achieves the electrical connection between the crowbar 31 and the DC connection busbar 2 by using transition buses 4. Furthermore, the identical size of each transition busbar 4 ensures that the current path between each crowbar 31 and the DC connection busbar 2 is equal, thereby reducing stray inductance generated in the circuit, reducing the impact of ripple current, and consequently reducing the impact force on the transition busbar 4 caused by ripple current, thus ensuring the reliability of the converter operation.

[0061] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, the DC connection busbar 2 includes N stacked busbars 21 arranged sequentially along a preset direction. Adjacent stacked busbars 21 are insulated from each other, and in two adjacent stacked busbars 21, a portion of one stacked busbar 21 is stacked on top of a portion of the other stacked busbar 21. Each stacked busbar 21 is electrically connected to a crowbar module 3. Each stacked busbar 21 includes input and output connection terminals arranged at intervals along a preset direction and interconnected. Two adjacent capacitor bank busbars 1 are electrically connected through the stacked busbars 21. Specifically, in two adjacent capacitor bank busbars 1, one capacitor bank busbar 1 has two output terminals spaced apart, each electrically connected to a corresponding input connection terminal. The other capacitor bank busbar 1 has two input terminals spaced apart, each electrically connected to a corresponding output connection terminal. This structural design of the DC connection busbar 2 effectively reduces its overall size, making it flexible to use and easy to maintain.

[0062] Optionally, in this embodiment, the two adjacent stacked busbars 21 are detachably connected, which makes it easier to maintain the DC connection busbar 2. In other embodiments, the two adjacent stacked busbars 21 can also be fixedly connected by adhesive or riveting, thereby ensuring the stability and reliability of the connection between the two adjacent stacked busbars 21.

[0063] Optionally, in this embodiment, the distances between the input connection terminal and the output connection terminal in each stacked busbar 21 are of equal length. Since each stacked busbar 21 includes input and output connection terminals arranged at intervals along a preset direction and interconnected, when the DC connection busbar 2 is performing AC / DC commutation, the current flowing from the first capacitor bank busbar 1 into the input connection terminal of one of the stacked busbars 21 flows out through the output connection terminal of that stacked busbar 21 to the second capacitor bank busbar 1, thus forming a commutation path. The length of each commutation path on the DC connection busbar 2 is the distance between the input and output connection terminals on that stacked busbar 21. Since the distance from the input connection terminal to the output connection terminal in each stacked busbar 21 is equal, the commutation paths formed by the DC connection busbar 2 are short and of equal length, resulting in uniform commutation. This further reduces stray inductance and ripple inductance between the power modules 8, alleviates electromagnetic interference, and avoids excessive local temperature of the DC connection busbar 2 affecting commutation, thus ensuring the reliability of the DC connection busbar 2. It should be noted that the number of stacked busbars 21 in the DC connection busbar 2 is the same as the number of capacitor bank busbars 1. That is, in this embodiment, the DC connection busbar 2 includes two stacked busbars 21 arranged sequentially along a preset direction.

[0064] In this embodiment, as Figure 3 and Figure 4 As shown, in two adjacent stacked busbars 21, one stacked busbar 21 has a first input connection terminal 201, and the other stacked busbar 21 has a second input connection terminal 203. One stacked busbar 21 has a first output connection terminal 202, and the other stacked busbar 21 has a second output connection terminal 204. The second input connection terminal 203 is located between the first input connection terminal 201 and the first output connection terminal 202. This arrangement of the two adjacent stacked busbars 21 facilitates the electrical connection between the DC connection busbar 2 and each capacitor bank busbar 1, and also ensures that the commutation paths formed by the DC connection busbar 2 are short and of equal length.

[0065] It should be noted that, in this embodiment, as Figure 2 As shown, the arrangement of the two adjacent stacked mother bars 21 is such that in the two adjacent pry bar modules 3, one pry bar 31 of one pry bar module 3 is located between the two pry bars 31 of the other pry bar module 3.

[0066] Specifically, such as Figure 3 As shown, in two adjacent capacitor bank busbars 1, the two output terminals on one capacitor bank busbar 1 are the first output terminal 101 and the second output terminal 102, respectively. The two input terminals on the other capacitor bank busbar 1 are the first input terminal 103 and the second input terminal 104, respectively. The first output terminal 101 is electrically connected to the first input connection terminal 201, and the first output connection terminal 202 is electrically connected to the first input terminal 103, so that the current on one capacitor bank busbar 1 passes sequentially through the first output terminal 101, the first input connection terminal 201, and the first output terminal 104. The current flows from the connection terminal 202 and the first input terminal 103 to another capacitor bank bus 1, thus forming a commutation path. The second output terminal 102 is electrically connected to the second input connection terminal 203, and the second output connection terminal 204 is electrically connected to the second input terminal 104. This allows the current on one capacitor bank bus 1 to flow through the second output terminal 102, the second input connection terminal 203, the second output connection terminal 204, and the second input terminal 104 in sequence to the other capacitor bank bus 1, thus forming another commutation path. This ensures that the two commutation paths are of equal length.

[0067] Optionally, in this embodiment, both the output terminal and the corresponding input connection terminal are designed as pins and electrically connected by bolts.

[0068] In this embodiment, as Figure 4 and Figure 5 As shown, the DC connection busbar 2 also includes a second insulator 22 and a fourth connecting bolt 23. The second insulator 22 is stacked on one of two adjacent stacked busbars 21, and the fourth connecting bolt 23 passes through the two adjacent stacked busbars 21 sequentially and is threadedly connected to the second insulator 22. This configuration achieves a detachable insulating connection between two adjacent stacked busbars 21, and the structure is simple, facilitating installation and disassembly. Optionally, in this embodiment, the second insulator 22 has an internal thread to facilitate threaded connection with the fourth connecting bolt 23. Optionally, the end of the second insulator 22 away from the fourth connecting bolt 23 also has an internal thread, allowing the bolt to pass through the converter cabinet and be threadedly connected to the second insulator 22, thereby achieving the installation and fixation of the DC connection busbar 2 on the cabinet and ensuring the stability of the DC connection busbar 2 installation. Optionally, in this embodiment, multiple fourth connecting bolts 23 are spaced apart along a preset direction, and each of the multiple fourth connecting bolts 23 corresponds to one of the multiple second insulators 22. The multiple fourth connecting bolts 23 and the multiple second insulators 22 are used together to achieve the installation and fixation of two adjacent stacked busbars 21, further ensuring the stability and reliability of the fixation between the two adjacent stacked busbars 21. Optionally, in this embodiment, four fourth connecting bolts 23 are spaced apart. In other embodiments, the specific number of fourth connecting bolts 23 can be set according to requirements.

[0069] In this embodiment, as Figures 6-9 As shown, the adapter busbar 4 includes a first connecting part 41 and a second connecting part 42 connected to each other. The first connecting part 41 and the second connecting part 42 are connected at an included angle. The first connecting part 41 is electrically connected to the laminated busbar 21, and the second connecting part 42 is electrically connected to the pry bar 31. The above-described structural design of the adapter busbar 4 makes it easy for both ends of the adapter busbar 4 to be electrically connected to corresponding locations, and the structure is simple and easy to process. Optionally, the adapter busbar 4 can be a copper busbar, and the first connecting part 41 is bent relative to the second connecting part 42.

[0070] In this embodiment, as Figures 6-8As shown, a first mounting hole 411 is provided on the first connecting part 41. Each stacked busbar 21 includes an insulating partition 212, a conductive post 213, a first connecting nut 214, a first connecting bolt 215, and multiple conductive busbars 211. The multiple conductive busbars 211 are stacked along the thickness direction of the stacked busbar 21. An insulating partition 212 is stacked on both sides of each conductive busbar 211 along its thickness direction. A conductive post 213 is connected to one side of each conductive busbar 211 along its thickness direction. The end face of each conductive post 213 protruding from the DC connecting busbar 2 is flush with the end face of each conductive post 213. The first connecting part 41 is abutted on the end face of each conductive post 213. A first connecting nut 214 is connected to the other side of each conductive busbar 211 along its thickness direction. The first connecting nut 214 is directly opposite to and through the corresponding conductive post 213. The first connecting bolt 215 passes through the first mounting hole 411 and the conductive post 213 in sequence and is threadedly connected to the first connecting nut 214. Electrical connection between the first connecting part 41 and the stacked busbar 21 is achieved by setting conductive posts 213, first connecting nuts 214, and first connecting bolts 215, resulting in a simple structure and reliable connection. Furthermore, the structure of the stacked busbar 21 allows for the placement of an insulating partition 212 between adjacent conductive busbars 211, ensuring insulation between conductive busbars 211 of different polarities and meeting safety regulations. Moreover, using the insulating partition 212 to insulate adjacent conductive busbars 211 eliminates the need for heat-pressing the insulating partition 212, significantly reducing processing costs compared to the traditional method of using an insulating film. Optionally, in this embodiment, the insulating partition 212 can be made of fiberglass or epoxy resin. It should be noted that in this embodiment, each stacked busbar 21 includes three conductive busbars 211: one positive conductive busbar, one negative conductive busbar, and one N-polar conductive busbar.

[0071] In this embodiment, as Figure 5 As shown, each conductive bus 211 extends outward with a connection pin 2112, which forms an input connection terminal or an output connection terminal. Furthermore, it should be noted that the extended connection pins 2112 are formed by bending each conductive bus 211. The specific number of connection pins 2112 on each conductive bus 211 is determined according to the polarity of that conductive bus 211. Since the specific number of connection pins 2112 on the conductive bus 211 is prior art, it will not be elaborated here.

[0072] Optionally, in this embodiment, as Figure 8As shown, the conductive busbar 211 is provided with a first clearance position 2111, which is used for the conductive post 213 on other conductive busbars 211 to pass through. The insulating partition 212 is provided with a second clearance position 2121, which is used for the corresponding conductive post 213 on the conductive busbar 211 to pass through. Optionally, in this embodiment, the first clearance position 2111 and the second clearance position 2121 can be designed in the form of clearance notches or clearance holes, as long as the size of the clearance notches and clearance holes is much larger than the outer diameter of the conductive post 213.

[0073] In this embodiment, as Figure 7 As shown, the second connecting part 42 has an insulating mounting hole 421. The converter also includes a first insulator 5 and a second connecting bolt 6. The first insulator 5 is embedded in the mounting plate 311 of the pry bar 31, and the second connecting bolt 6 passes through the insulating mounting hole 421 and is threadedly connected to the first insulator 5. By setting the first insulator 5 and the second connecting bolt 6, the second connecting part 42 of the transition busbar 4 can be insulatedly fixed to the mounting plate 311 of the pry bar 31, realizing the insulated fixation of the transition busbar 4 and ensuring the stability of the relative position of the transition busbar 4. Optionally, in this embodiment, the mounting plate 311 can be in the form of a sheet metal part.

[0074] Optionally, in this embodiment, as Figure 7 and Figure 9 As shown, the second connecting part 42 has a second mounting hole 422. The converter also includes a second connecting nut 7 and a third connecting bolt (not shown in the figure). The second connecting nut 7 is embedded in the terminal 312 of the pry bar 31, and the third connecting bolt passes through the second mounting hole 422 and is threadedly connected to the second connecting nut 7. The above configuration realizes the electrical connection between the second connecting part 42 and the pry bar 31, and the structure is simple and the connection is reliable.

[0075] Obviously, the above embodiments of this specification are merely examples for clearly illustrating the embodiments of this specification, and are not intended to limit the implementation of the embodiments of this specification. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this specification should be included within the protection scope of the claims of the embodiments of this specification.

Claims

1. A converter, characterized in that, include: N capacitor bank busbars (1), the N capacitor bank busbars (1) are arranged sequentially along a preset direction; DC connection busbar (2), and N capacitor bank busbars (1) are all electrically connected to the DC connection busbar (2); N pry bar modules (3), each pry bar module (3) including two pry bars (31) arranged sequentially along the preset direction; and Multiple adapter busbars (4) are provided, all of which are the same size, and each of the crowbars (31) is electrically connected to the DC connection busbar (2) via the adapter busbars (4).

2. The converter according to claim 1, characterized in that, The DC connection busbar (2) includes N stacked busbars (21) arranged sequentially along the preset direction. The two adjacent stacked busbars (21) are insulated from each other. In the two adjacent stacked busbars (21), a part of one stacked busbar (21) is stacked on a part of the other stacked busbar (21). Each stacked busbar (21) is electrically connected to the crowbar module (3). Each of the stacked busbars (21) includes an input connection terminal and an output connection terminal that are spaced apart along the preset direction and are interconnected. Two adjacent capacitor bank busbars (1) are electrically connected through the stacked busbars (21).

3. The converter according to claim 2, characterized in that, The two adjacent stacked busbars (21) are detachably connected.

4. The converter according to claim 2, characterized in that, The distance from the input connection terminal to the output connection terminal in each of the stacked busbars (21) is equal.

5. The converter according to any one of claims 2 to 4, characterized in that, Of the two adjacent stacked busbars (21), one of the stacked busbars (21) has a first input connection terminal (201) and a first output connection terminal (202), and the other stacked busbar (21) has a second input connection terminal (203) and a second output connection terminal (204), wherein the second input connection terminal (203) is located between the first input connection terminal (201) and the first output connection terminal (202); In two adjacent pry bar modules (3), one of the pry bars (31) in one of the pry bar modules (3) is located between the two pry bars (31) in the other pry bar module (3).

6. The converter according to any one of claims 2 to 4, characterized in that, The adapter busbar (4) includes a first connecting part (41) and a second connecting part (42) connected to each other. The first connecting part (41) and the second connecting part (42) are connected at an angle. The first connecting part (41) is electrically connected to the stacked busbar (21), and the second connecting part (42) is electrically connected to the crowbar (31).

7. The converter according to claim 6, characterized in that, The first connecting part (41) is provided with a first mounting hole (411), and each of the stacked busbars (21) includes: Multiple conductive busbars (211) are stacked along the thickness direction of the stacked busbar (21); Insulating partition (212), each of the conductive bars (211) has the insulating partition (212) stacked on both sides opposite to each other along its thickness direction; Conductive post (213), each of the conductive busbars (211) is connected to one side along its thickness direction, and the end face of each conductive post (213) extending out of the DC connection busbar (2) is flush with the end face of the busbar, and the first connection part (41) abuts against the end face of the corresponding conductive post (213). A first connecting nut (214) is provided, and each of the conductive bars (211) is connected to the other side along its thickness direction. The first connecting nut (214) is directly opposite to and penetrates the corresponding conductive post (213). The first connecting bolt (215) passes through the first mounting hole (411) and the conductive post (213) in sequence and is threadedly connected to the first connecting nut (214).

8. The converter according to claim 7, characterized in that, The conductive busbar (211) is provided with a first clearance position (2111), which is used to allow the conductive post (213) on other conductive busbars (211) to pass through; The insulating partition (212) is provided with a second clearance position (2121), which is used for the corresponding conductive post (213) to pass through.

9. The converter according to claim 7, characterized in that, Each of the conductive busbars (211) extends outward with a connection pin (2112), which forms the input connection terminal or the output connection terminal.

10. The converter according to claim 6, characterized in that, The second connecting part (42) is provided with an insulating mounting hole (421), and the converter further includes: The first insulator (5) is embedded in the mounting plate (311) of the crowbar (31); The second connecting bolt (6) passes through the insulating mounting hole (421) and is threaded to the first insulator (5).

11. The converter according to claim 6, characterized in that, The second connecting part (42) is provided with a second mounting hole (422), and the converter further includes: The second connecting nut (7) is embedded in the terminal (312) of the pry bar (31); The third connecting bolt passes through the second mounting hole (422) and is threadedly connected to the second connecting nut (7).

12. The converter according to any one of claims 2 to 4, characterized in that, The DC connection busbar (2) also includes: A second insulator (22) is stacked on one of two adjacent stacked busbars (21); and The fourth connecting bolt (23) passes through two adjacent stacked busbars (21) and is threadedly connected to the second insulator (22).

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