A marine power distribution busbar

Abstract

This utility model relates to a marine power distribution busbar, belonging to the technical field of marine electrical equipment. It includes an A-phase busbar, a B-phase busbar, and a C-phase busbar, all three phases of which are housed within a distribution cabinet and extend through one side of the cabinet. The distribution cabinet includes at least a first generator cabinet, a second generator cabinet, and a combiner cabinet. Each phase of the busbar includes 3-5 sets of copper busbars. Each set of copper busbars consists of a first horizontal copper busbar, a first vertical copper busbar, a second horizontal copper busbar, a second vertical copper busbar, and a third horizontal copper busbar bent in sequence. Each set of copper busbars is arranged parallel and evenly spaced along the longitudinal direction, constructing a three-level "horizontal-vertical-horizontal" combiner network to ensure efficient power distribution. This utility model has advantages such as high current carrying capacity and low loss, efficient three-dimensional heat dissipation, flexibility, and scalability, meeting the high-power power requirements of ships.

Description

Technical Field

[0001] This utility model relates to the field of marine electrical equipment technology, specifically to a marine power distribution busbar. Background Technology

[0002] In marine electrical systems, switchboards are critical equipment, responsible for reliably distributing the power generated by generators to various electrical loads. Traditional marine switchboards typically address high-current transmission requirements by increasing the width and thickness of copper busbars. However, this approach has several drawbacks. First, it's difficult to increase the size of individual copper busbars indefinitely, and excessively large busbars hinder on-site installation. Second, changes in size only slightly increase the current output. Furthermore, traditional marine switchboards typically use a parallel busbar layout, which leads to significant mutual interference between different phases during high-current transmission, resulting in substantial transmission losses. Summary of the Invention

[0003] The purpose of this utility model is to provide a marine power distribution busbar that improves the current carrying capacity, heat dissipation performance and space utilization of the power distribution device by optimizing the copper busbar layout and connection structure, thereby meeting the power supply requirements of high-power electrical equipment in the ship's power system.

[0004] To achieve the above objectives, this utility model designs a marine power distribution busbar, which includes an A-phase busbar, a B-phase busbar, and a C-phase busbar. The A, B, and C phase busbars are all installed inside a power distribution cabinet and pass through one side of the cabinet. The power distribution cabinet includes at least a first generator cabinet, a second generator cabinet, and a combiner cabinet.

[0005] Each phase of the busbar includes 3-5 groups of copper busbars. Each group of copper busbars consists of a first horizontal copper busbar, a first vertical copper busbar, a second horizontal copper busbar, a second vertical copper busbar, and a third horizontal copper busbar bent in sequence. Each group of copper busbars is arranged parallel and evenly spaced along the longitudinal direction.

[0006] The conductivity of the busbar is improved by increasing the number and cross-section of current-carrying conductors, while the heat dissipation efficiency is improved by utilizing air convection channels.

[0007] The first horizontal copper busbar is installed at the top of the first generator cabinet and the combiner cabinet, extending horizontally; the second horizontal copper busbar is horizontally arranged at the bottom of the combiner cabinet; the first vertical copper busbar is vertically arranged in the middle area of ​​the combiner cabinet; the third horizontal copper busbar is horizontally arranged at the top of the combiner cabinet and the second generator cabinet; the second vertical copper busbar is located on one side inside the combiner cabinet.

[0008] The top and bottom horizontal copper busbars are connected by a busbar arranged vertically inside the cabinet to form a three-dimensional "horizontal-vertical-horizontal" three-level busbar network, ensuring efficient distribution of power within the cabinet.

[0009] The first generator cabinet and the combiner cabinet are connected by the first horizontal copper busbar group among the three-phase busbars A, B, and C; the combiner cabinet and the second generator cabinet are connected by the third horizontal copper busbar group among the three-phase busbars A, B, and C; the A-phase busbar, B-phase busbar and C-phase busbar are arranged in parallel and evenly spaced longitudinally.

[0010] The horizontal direction is the x-axis direction in the Cartesian coordinate system, the vertical direction is the y-axis direction in the Cartesian coordinate system, and the vertical direction is the z-axis direction in the Cartesian coordinate system.

[0011] Furthermore, the copper busbar thickness is 2mm-5mm, and in the same phase busbar, the interval between adjacent copper busbars is not less than 1 times the copper busbar thickness.

[0012] By controlling the thickness of the copper busbar to 2mm-5mm, both the mechanical strength and current carrying capacity of the copper busbar are ensured. The current carrying capacity of the copper busbar does not increase linearly with the width and thickness of the copper busbar. The busbar increases the current carrying area by at least 3 times compared to the traditional copper busbar by arranging multiple rows of copper busbars in parallel into a single phase busbar. The increase in current carrying area improves the current carrying capacity of the busbar.

[0013] In the A-phase busbar, B-phase busbar, and C-phase busbar, the interval between adjacent busbars is not less than 5 times the width of the copper busbar; in the three-phase busbar, the adjacent first vertical copper busbar group is offset laterally by at least one time the width of the copper busbar, and in the three-phase busbar, the adjacent second vertical copper busbar group is offset laterally by at least one-third the width of the copper busbar.

[0014] During current transmission, the spatial misalignment of adjacent vertical busbars can reduce heat loss caused by electromagnetic interference, increase the current carrying capacity of the busbars, and reduce the current loss rate.

[0015] Furthermore, each of the first vertical copper busbars in the A, B, and C three-phase busbars is equipped with a connecting switch.

[0016] The interconnection switch is used to control the on / off state of the corresponding busbar, thereby enabling flexible allocation of power output from the first and second generator cabinets on both sides of the distribution cabinet.

[0017] Furthermore, the second vertical copper busbar in the A, B, and C three-phase busbars is fixed to one side of the combiner cabinet by means of a bonding bracket and bolts.

[0018] Furthermore, the first and second power generation cabinets also include three sets of copper busbars arranged in parallel along the longitudinal direction. Each copper busbar set consists of a fourth horizontal copper busbar, a third vertical copper busbar, and a fifth horizontal copper busbar that are continuously bent. The first and second power generation cabinets are each provided with a fourth horizontal copper busbar at the top, and the first and second power generation cabinets are each provided with a third vertical copper busbar on one side. The fifth horizontal copper busbar is located below the fourth horizontal copper busbar.

[0019] The three sets of copper busbars in the first and second generator cabinets are used to transmit the power generated by the generator cabinets to the busbars, thereby enabling flexible allocation of the power generated by the two generator cabinets to the three-phase busbars A, B, and C.

[0020] Furthermore, the fourth horizontal copper busbar and the fifth vertical copper busbar are fixed to the inner wall of the cabinet back panel of the generator cabinet by L-shaped adapters and bolts evenly arranged on the cabinet back panel. One end of the fourth horizontal copper busbar and the fifth vertical copper busbar are fixed to the same side of the cabinet by insulating brackets, and the other end is fixed to the third vertical copper busbar by wiring bolts.

[0021] The horizontal copper busbar is fixedly connected to the cabinet side panel, cabinet back panel, and vertical copper plate to achieve a three-point fixing structure, which improves the seismic performance of the copper busbar in actual applications on ships.

[0022] Furthermore, the third vertical copper busbar in the three sets of copper busbars arranged in parallel along the longitudinal direction is fixedly connected to the first horizontal copper busbar in the A-phase busbar, B-phase busbar and C-phase busbar by wiring bolts.

[0023] Furthermore, both sides of the first power generation cabinet, the second power generation cabinet, and the distribution cabinet are provided with heat dissipation holes, which are arranged in a matrix and have a diameter of 5mm-8mm.

[0024] The ventilation holes on the side panel of the cabinet are used for passive heat dissipation of the cabinet, which makes the power distribution cabinet form a synergistic heat dissipation mechanism of "active heat dissipation of copper busbars + passive ventilation of cabinet", thus improving the heat dissipation performance of the power distribution cabinet.

[0025] Furthermore, the cabinets and doors of the first power generation cabinet, the second power generation cabinet, and the distribution cabinet are connected by stainless steel hinges.

[0026] The advantages and beneficial effects of this utility model are as follows:

[0027] 1. High current carrying capacity and low loss: The parallel connection of multiple rows of copper busbars significantly increases the current carrying capacity, meeting the high power demand of ships. At the same time, the parallel design shortens the current transmission path and reduces the line resistance. The copper busbars are fastened with bolts or welded together, further reducing contact resistance.

[0028] 2. High-efficiency three-dimensional heat dissipation: Utilizing a multi-row parallel copper busbar design, the heat dissipation surface area is increased by at least three times compared to traditional single-row copper busbars. This three-dimensional heat dissipation structure, formed by multiple rows of copper busbars, combined with copper's excellent thermal conductivity, allows for rapid and even heat dissipation to the surrounding environment under high loads.

[0029] 3. Flexibility and scalability: The multi-row parallel copper busbar design offers high flexibility, allowing for customized design based on the specific needs of different ship electrical systems. The number, specifications, and arrangement of the copper busbars can be flexibly adjusted according to factors such as actual current magnitude, voltage level, and cabinet space to meet diverse power transmission requirements. This flexibility enables this invention to adapt to the electrical systems of various types of ships, giving it broad application prospects. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of the power distribution cabinet;

[0032] Figure 3 This is a partially enlarged schematic diagram of part A of the power distribution cabinet;

[0033] In the diagram: 1. First generator cabinet; 2. Distribution cabinet; 3. Second generator cabinet; 4. Phase A busbar; 5. Phase B busbar; 6. Phase C busbar; 7. First horizontal copper busbar; 8. First vertical copper busbar; 9. Second horizontal copper busbar; 10. Second vertical copper busbar; 11. Third horizontal copper busbar; 12. Fourth horizontal copper busbar; 13. Fifth horizontal copper busbar; 14. Third vertical copper busbar; 15. Connecting switch; 16. L-shaped adapter; 17. Expansion interface. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention. Example 1:

[0035] A type of marine power distribution busbar, such as Figure 1 As shown, the power distribution busbar includes A-phase busbar 4, B-phase busbar 5 and C-phase busbar 6. The A, B and C phase busbars are all installed inside the power distribution cabinet and pass through one side of the cabinet. The power distribution cabinet includes at least a first generator cabinet 1, a second generator cabinet 3 and a combiner cabinet 2.

[0036] In this embodiment, each phase of the busbar includes 4 groups of copper busbars. Each group of copper busbars consists of a first horizontal copper busbar 7, a first vertical copper busbar 8, a second horizontal copper busbar 9, a second vertical copper busbar 10, and a third horizontal copper busbar 11 bent in sequence. Each group of copper busbars is arranged parallel and evenly spaced along the longitudinal direction.

[0037] Preferably, the bending angle between the horizontal copper busbar and the vertical copper busbar is 90° (i.e., vertical connection). This vertical connection structure makes the magnetic fields generated by the current orthogonal to each other. Under this connection relationship, the magnetic field coupling effect is weak, which can effectively reduce electromagnetic interference and eddy current loss, reduce energy loss, and improve the system's power transmission efficiency.

[0038] The conductivity of the busbar is improved by increasing the number and cross-section of current-carrying conductors, while the heat dissipation efficiency is improved by utilizing air convection channels.

[0039] The first horizontal copper busbar 7 is arranged on the top of the first generator cabinet 1 and the combiner cabinet 2, extending horizontally; the second horizontal copper busbar 9 is arranged horizontally at the bottom of the combiner cabinet 2; the first vertical copper busbar 8 is arranged vertically in the middle area of ​​the combiner cabinet 2; the third horizontal copper busbar 11 is arranged horizontally on the top of the combiner cabinet 2 and the second generator cabinet 3; the second vertical copper busbar 10 is located on one side inside the combiner cabinet 2.

[0040] The top and bottom horizontal copper busbars are connected by a busbar arranged vertically inside the cabinet to form a three-dimensional "horizontal-vertical-horizontal" three-level busbar network, ensuring efficient distribution of power within the cabinet.

[0041] The first generator cabinet 1 and the combiner cabinet 2 are connected by 7 sets of first horizontal copper busbars in the three-phase busbars A, B, and C; the combiner cabinet 2 and the second generator cabinet 3 are connected by 11 sets of third horizontal copper busbars in the three-phase busbars A, B, and C; the A-phase busbar 4, B-phase busbar 5 and C-phase busbar 6 are arranged in parallel and evenly spaced longitudinally.

[0042] The horizontal direction is the x-axis direction in the Cartesian coordinate system, the vertical direction is the y-axis direction in the Cartesian coordinate system, and the vertical direction is the z-axis direction in the Cartesian coordinate system. Example 2:

[0043] like Figure 2 As shown, based on Example 1, this embodiment further defines the connection relationship between copper busbars.

[0044] Preferably, in this embodiment, the copper busbar thickness is 5mm, and the interval between adjacent copper busbars in the same phase busbar is 8mm.

[0045] The 8mm spacing width provides space for air convection in the copper busbar. During current transmission, air convection makes the copper busbar dissipate heat evenly, reducing the heat loss generated by current transmission.

[0046] The 5mm thickness of the copper busbar ensures both its mechanical strength and current carrying capacity. The current carrying capacity of the copper busbar does not increase linearly with its width and thickness. By arranging multiple copper busbars in parallel into a single phase busbar, the current carrying area is increased by at least three times compared to traditional copper busbars, thus increasing the current carrying capacity of the busbar.

[0047] In the A-phase busbar 4, B-phase busbar 5 and C-phase busbar 6, the interval between adjacent busbars is not less than 5 times the width of the copper busbar; in the three-phase busbars, the adjacent first vertical copper busbars 8 groups are offset laterally by at least one time the width of the copper busbar, and in the three-phase busbars, the adjacent second vertical copper busbars 10 groups are offset laterally by at least one-third the width of the copper busbar.

[0048] During current transmission, the spatial misalignment of adjacent vertical busbars can reduce heat loss caused by electromagnetic interference, increase the current carrying capacity of the busbars, and reduce the current loss rate.

[0049] Furthermore, each of the eight vertical copper busbars in the three-phase busbars A, B, and C is equipped with a connecting switch 15.

[0050] The interconnection switch 15 is used to control the on / off state of the corresponding busbar, thereby enabling flexible allocation of the power output from the first generator cabinet 1 and the second generator cabinet 3 on both sides of the distribution cabinet.

[0051] Preferably, the second vertical copper busbar 10 of the three-phase busbars A, B, and C is fixed to one side of the combiner cabinet 2 by means of a bonding bracket and bolts.

[0052] Preferably, the first power generation cabinet 1 and the second power generation cabinet 3 further include three sets of copper busbars arranged in parallel along the longitudinal direction. The copper busbars are composed of a fourth horizontal copper busbar 12, a third vertical copper busbar 14 and a fifth horizontal copper busbar 13 that are continuously bent. The first power generation cabinet 1 and the second power generation cabinet 3 are each provided with a fourth horizontal copper busbar 12 at the top, and the first power generation cabinet 1 and the second power generation cabinet 3 are each provided with a third vertical copper busbar 14 on one side. The fifth horizontal copper busbar 13 is located below the fourth horizontal copper busbar 12.

[0053] The three sets of copper busbars in the first generator cabinet 1 and the second generator cabinet 3 are used to transmit the power generated by the generator cabinet to the busbar, thereby realizing the flexible allocation of the power generated by the two generator cabinets by the three-phase busbars A, B and C.

[0054] Preferably, the fourth horizontal copper busbar 12 and the fifth vertical copper busbar are fixed to the inner wall of the cabinet back panel of the generator cabinet by L-shaped adapters 16 evenly arranged on the cabinet back panel and bolts. One end of the fourth horizontal copper busbar 12 and the fifth vertical copper busbar are fixed to the same side of the cabinet by insulating brackets, and the other end is fixed to the third vertical copper busbar by wiring bolts.

[0055] The horizontal copper busbar is fixedly connected to the cabinet side panel, cabinet back panel, and vertical copper plate to achieve a three-point fixing structure, which improves the seismic performance of the copper busbar in actual applications on ships.

[0056] Preferably, the third vertical copper busbar 14 in the three groups of copper busbars arranged in parallel along the longitudinal direction is fixedly connected to the first horizontal copper busbar 7 in the A-phase busbar 4, B-phase busbar 5 and C-phase busbar 6 by wiring bolts. Example 3:

[0057] like Figure 3 As shown, a marine power distribution busbar that is easy to implement on site, based on the above embodiments, this embodiment further defines the cabinet structure.

[0058] Preferably, the copper busbar structures inside the first generator cabinet 1, the combiner cabinet 2, and the second generator cabinet 3 have reserved expansion interfaces 17 to facilitate the subsequent addition of copper busbar groups. The combiner device of the distribution cabinet adopts a modular design, with each copper busbar unit as an independent module. When the ship needs to expand its power, technicians can quickly plug and unplug modules. The first horizontal copper busbar 74 and the second horizontal copper busbar 94 of the new module are connected to the cabinet through standardized interfaces. After expansion, the new module undergoes insulation testing, continuity testing, and other processes to ensure that the added power output is flexible and controllable, demonstrating the adaptability and expandability of the device in complex and ever-changing scenarios.

[0059] Preferably, the first generator cabinet 1, the second generator cabinet 3 and the combiner cabinet 2 are provided with heat dissipation holes on both sides of the cabinet body. The heat dissipation holes are arranged in a matrix and the hole diameter is 5-8mm.

[0060] In this embodiment, the heat dissipation holes are arranged at a spacing of 8mm×16mm, with an opening rate of not less than 30%, forming a synergistic heat dissipation mechanism of "active heat dissipation of copper busbars + passive ventilation of cabinet".

[0061] Preferably, the cabinets of the first generator cabinet 1, the second generator cabinet 3, and the combiner cabinet 2 are connected to the cabinet doors by stainless steel hinges.

Claims

1. A marine power distribution busbar, characterized in that, The power distribution busbar includes three-phase busbars A, B, and C. Specifically, the three-phase busbars A, B, and C are composed of a phase A busbar (4), a phase B busbar (5), and a phase C busbar (6). The three-phase busbars A, B, and C are all installed inside the power distribution cabinet and pass through one side of the cabinet. The power distribution cabinet includes at least a first generator cabinet (1), a second generator cabinet (3), and a combiner cabinet (2). Each phase busbar is provided with 3-5 sets of copper busbars. Each set of copper busbars consists of a first horizontal copper busbar (7), a first vertical copper busbar (8), a second horizontal copper busbar (9), a second vertical copper busbar (10), and a third horizontal copper busbar (11) bent into a pulse waveform in sequence. Each set of copper busbars is arranged in parallel and evenly spaced along the longitudinal direction. The first horizontal copper busbar (7) is arranged on the top of the first generator cabinet (1) and the combiner cabinet (2) and extends horizontally; the second horizontal copper busbar (9) is arranged horizontally at the bottom of the combiner cabinet (2); the first vertical copper busbar (8) is arranged vertically in the middle area of ​​the combiner cabinet (2); the third horizontal copper busbar (11) is arranged horizontally on the top of the combiner cabinet (2) and the second generator cabinet (3); the second vertical copper busbar (10) is located on one side inside the combiner cabinet (2); The first generator cabinet (1) and the combiner cabinet (2) are connected by the first horizontal copper busbar (7) in the three-phase busbars A, B, and C; the combiner cabinet (2) and the second generator cabinet (3) are connected by the third horizontal copper busbar (11) in the three-phase busbars A, B, and C; the A-phase busbar (4), B-phase busbar (5) and C-phase busbar (6) are arranged in parallel and evenly spaced along the longitudinal direction.

2. A marine power distribution busbar according to claim 1, characterized in that, The copper busbar has a thickness of 2mm-5mm, and in the same phase busbar, the interval between adjacent copper busbars is not less than 1 times the copper busbar thickness.

3. A marine power distribution busbar according to claim 1, characterized in that, In the A-phase busbar (4), B-phase busbar (5) and C-phase busbar (6), the interval between adjacent busbars is not less than 5 times the width of the copper busbar; in the three-phase busbars, the adjacent first vertical copper busbar (8) group is offset by at least one time the width of the copper busbar in the horizontal direction, and the adjacent second vertical copper busbar (10) group in the three-phase busbars is offset by at least one-third the width of the copper busbar in the horizontal direction.

4. A marine power distribution busbar according to claim 1, characterized in that, The first vertical copper busbar (8) of the three-phase busbars A, B, and C is equipped with a connecting switch (15).

5. A marine power distribution busbar according to claim 1, characterized in that, The second vertical copper busbar (10) in the three-phase busbars A, B, and C is fixed to one side of the combiner cabinet (2) by a bonding bracket and bolts.

6. A marine power distribution busbar according to claim 1, characterized in that, The first power generation cabinet (1) and the second power generation cabinet (3) also include three sets of copper busbars arranged in parallel along the longitudinal direction. The copper busbars are composed of a fourth horizontal copper busbar (12), a third vertical copper busbar (14) and a fifth horizontal copper busbar (13) that are continuously bent. The first power generation cabinet (1) and the second power generation cabinet (3) are provided with a fourth horizontal copper busbar (12) at the top. The first power generation cabinet (1) and the second power generation cabinet (3) are provided with a third vertical copper busbar (14) on one side. The fifth horizontal copper busbar (13) is located below the fourth horizontal copper busbar (12).

7. A marine power distribution busbar according to claim 6, characterized in that, The fourth horizontal copper busbar (12) and the fifth vertical copper busbar are fixed to the inner wall of the cabinet back panel of the generator cabinet by L-shaped adapters and bolts evenly arranged on the cabinet back panel. One end of the fourth horizontal copper busbar (12) and the fifth vertical copper busbar are fixed to the same side of the cabinet by insulating brackets, and the other end is fixed to the third vertical copper busbar by wiring bolts.

8. A marine power distribution busbar according to claim 6, characterized in that, The third vertical copper busbar (14) in the three sets of copper busbars arranged in parallel along the longitudinal direction is fixedly connected to the first horizontal copper busbar (7) in the A-phase busbar (4), B-phase busbar (5) and C-phase busbar (6) by wiring bolts.

9. A marine power distribution busbar according to claim 1, characterized in that, The first power generation cabinet (1), the second power generation cabinet (3) and the power distribution cabinet are provided with heat dissipation holes on both sides. The heat dissipation holes are arranged in a matrix and the hole diameter is 5mm-8mm.

10. A marine power distribution busbar according to claim 1, characterized in that, The cabinets and doors of the first power generation cabinet (1), the second power generation cabinet (3), and the distribution cabinet are connected by stainless steel hinges.

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