Marine frequency converter cabinet and marine power generation system

Abstract

The utility model discloses an electric power equipment technical field relates to a kind of marine frequency converter cabinet and marine power generation system, wherein, the marine frequency converter cabinet includes: switch cabinet, control cabinet, heat dissipation cabinet and at least two cabinet combinations, cabinet combination includes machine side power cabinet, net side power cabinet and filter cabinet, the cabinet layout of frequency converter cabinet includes switch cabinet as center, control cabinet, heat dissipation cabinet and at least two cabinet combinations symmetrical arrangement, by multiple cabinet combinations, the overall load of marine frequency converter is balanced, the load demand of marine power generation system to each frequency converter module is reduced, the expandability of marine frequency converter is improved, by setting multiple cabinet combinations, modular design of detachable is realized, the simplification design of marine frequency converter is further realized.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a marine frequency converter cabinet and a marine power generation system. Background Technology

[0002] Fuel costs constitute a significant portion of ship management costs during operation. To reduce these costs, new green and environmentally friendly methods need to be introduced. With the emergence of green and intelligent ship concepts, new power systems have arisen. Many ships choose to install shaft generators and frequency converters, which can utilize the redundant power reserves of the ship's main engine to achieve energy savings. This allows the main engine to meet normal operating requirements while simultaneously driving the shaft generator to generate electricity to meet the ship's normal navigation needs.

[0003] Traditional marine frequency converters are typically modular designs with fixed power ratings, making them unsuitable for expansion and adaptation to the needs of different vessels. Furthermore, they suffer from limited on-site installation space, restricted openings in hoisting compartments, complex application environments, high maintenance costs, and short lead times, generally around 30-45 days.

[0004] Therefore, there is a need for a detachable, modular marine frequency converter to adapt to diverse needs and shorten the research and development and production cycle. Utility Model Content

[0005] The purpose of this application is to provide at least one marine inverter cabinet and a marine power generation system to solve the above-mentioned problems.

[0006] According to a first aspect of this application, a marine frequency converter cabinet is provided. The marine frequency converter cabinet includes a switch cabinet, a control cabinet, a heat dissipation cabinet, and at least two cabinet combinations. The cabinet combinations include a machine-side power cabinet, a grid-side power cabinet, and a filter cabinet. The switch cabinet contains switching devices for controlling the on / off state of the marine frequency converter's circuitry. The control cabinet contains control devices for adjusting the output frequency and voltage of the marine frequency converter. The machine-side power cabinet contains a machine-side power module connected to a generator for converting AC power output from the generator into DC power. The grid-side power cabinet contains a grid-side power module connected to the machine-side power module for converting DC power output from the machine-side power module into AC power for the ship's power network. The filter cabinet contains a filter module connected to the grid-side power module for eliminating harmonics from the marine frequency converter. The cabinet layout of the frequency converter cabinet includes a symmetrical arrangement of the control cabinet, the heat dissipation cabinet, and the at least two cabinet combinations with the switch cabinet at the center.

[0007] Optionally, the circuit of the marine frequency converter includes at least two branches, which are connected in parallel. Each branch includes the engine-side power module, the grid-side power module, and the filter module.

[0008] Optionally, the marine frequency converter cabinet includes two cabinet combinations, and the cabinet layout includes: with the switch cabinet as the center, the two cabinet combinations are respectively located on both sides of the switch cabinet, the control cabinet is adjacent to one of the two cabinet combinations, and the heat dissipation cabinet is adjacent to the other of the two cabinet combinations.

[0009] Optionally, the cabinet layout of the cabinet assembly includes: the switch cabinet is located on one side of the machine-side power cabinet, the network-side power cabinet is located on the other side of the machine-side power cabinet, the network-side power cabinet is located on one side of the filter cabinet corresponding to the filter module, and the heat dissipation cabinet or the control cabinet is located on the other side of the filter cabinet.

[0010] Optionally, the disconnected portions of the busbars of adjacent cabinets in the marine frequency converter are connected by flexible copper busbars; the disconnected portions of the cooling pipes of adjacent cabinets in the marine frequency converter are connected by pipe connector busbars.

[0011] Optionally, the first side of the control cabinet is provided with an external wiring terminal for connecting external equipment; the second side of the control cabinet is provided with an internal wiring terminal for connecting the internal equipment of the marine frequency converter, wherein the second side of the control cabinet is the side adjacent to the filter cabinet; the control cabinet is provided with a drive control unit (DCU) chassis.

[0012] Optionally, a filter element is provided in the center of the filter cabinet, which is used to eliminate harmonics of the marine frequency converter, and a busbar is provided at the bottom inner side of the filter cabinet.

[0013] Optionally, the cabinet structure of the machine-side power cabinet is the same as that of the grid-side power cabinet.

[0014] Optionally, the switch cabinet includes a heat dissipation component, a water receiving plate, and a plug-in terminal block. The heat dissipation component is symmetrically arranged inside the switch cabinet and is connected to the cooling pipe of the marine frequency converter to cool the coolant in the cooling pipe. The water receiving plate is located below the heat dissipation component. The plug-in terminal block is located on the top inner side of the switch cabinet.

[0015] According to a second aspect of this application, a marine power generation system is also provided, including a marine inverter cabinet as described in the first aspect and a shaft-driven generator, wherein the marine inverter cabinet is connected to the shaft-driven generator for converting the current output by the shaft-driven generator into alternating current corresponding to the ship's power network.

[0016] The marine frequency converter cabinet provided in the embodiments of this application includes a switch cabinet, a control cabinet, a heat dissipation cabinet, and at least two cabinet combinations. The cabinet combination includes a generator-side power cabinet, a grid-side power cabinet, and a filter cabinet. The cabinet layout of the frequency converter cabinet includes a symmetrical arrangement of the control cabinet, heat dissipation cabinet, and at least two cabinet combinations with the switch cabinet as the center. The multiple cabinet combinations balance the overall load of the marine frequency converter, reducing the load requirements of the marine power generation system on each frequency converter module, improving the scalability of the marine frequency converter, and realizing a modular design that can be disassembled by setting multiple cabinet combinations, further realizing the simplified design of the marine frequency converter. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a structural schematic diagram of a marine frequency converter cabinet according to an embodiment of this application;

[0019] Figure 2 This is a circuit diagram of a marine frequency converter provided according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the cabinet layout of a marine frequency converter cabinet according to an embodiment of this application;

[0021] Figure 4a This is a schematic diagram of the cabinet layout of a marine frequency converter cabinet according to an embodiment of this application;

[0022] Figure 4b This is a schematic diagram of the cabinet layout of the hidden cabinet door of the marine frequency converter cabinet according to an embodiment of this application;

[0023] Figure 4c This is a schematic diagram of the disassembled cabinet layout of a marine frequency converter cabinet according to an embodiment of this application;

[0024] Figure 4d This is a schematic diagram of a low-power shaft generator cabinet for a marine frequency converter according to an embodiment of this application;

[0025] Figure 5This is a schematic diagram of a DC busbar splicing structure provided according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of a three-phase AC busbar splicing structure provided according to an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of a pipeline splicing structure provided according to an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the control cabinet layout according to an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the filter cabinet layout according to an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the power cabinet layout according to an embodiment of this application;

[0031] Figure 11 This is a schematic diagram of the power cabinet layout according to an embodiment of this application;

[0032] Figure 12 This is a schematic diagram of the internal circulation of a marine frequency converter cabinet according to an embodiment of this application;

[0033] Figure 13 This is a schematic diagram of a marine power generation system according to an embodiment of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0035] Traditional marine frequency converters are typically monolithic designs with fixed power ratings, making them unsuitable for expansion and adaptation to the needs of different vessels. Furthermore, limited on-site installation space, restricted openings in hoisting compartments, complex application environments, and high maintenance costs necessitate a modular, detachable marine frequency converter design to meet diverse requirements and shorten research and development and production cycles.

[0036] To address the aforementioned problems, a first aspect of this application provides a marine frequency converter cabinet, such as... Figure 1As shown, the marine frequency converter cabinet 10 includes: a switch cabinet 100, a control cabinet 300, a heat dissipation cabinet 400, and at least two cabinet combinations 200. The cabinet combination 200 includes a machine-side power cabinet 210, a grid-side power cabinet 220, and a filter cabinet 230.

[0037] The filter cabinet 203 is equipped with a filter module, which is connected to the grid-side power module to eliminate harmonics of the marine frequency converter;

[0038] like Figure 1 As shown, the cabinet layout of the inverter cabinet 10 includes a symmetrical arrangement of a switch cabinet 100, a control cabinet 300, a heat dissipation cabinet 400, and at least two cabinet combinations 200.

[0039] In this embodiment, the marine frequency converter cabinet 10 is connected to the shaft-driven generator and is used to rectify the current generated by the shaft-driven generator.

[0040] Switch cabinet 100 is equipped with switching devices to control the on / off state of the marine frequency converter circuit. It performs rapid switching according to the instructions sent by the control module in control cabinet 300, thereby achieving efficient control of electrical energy.

[0041] The control cabinet 300 is equipped with control devices to receive and process external input signals, generate control commands, control the operation of the main circuit of the marine frequency converter, adjust the output frequency and voltage of the marine frequency converter, and realize the speed regulation function of the motor in the working mode of driving the motor.

[0042] The heat dissipation cabinet 400 is equipped with a heat sink, which is used to cool the marine frequency converter through heat exchange by means of fans, heat sinks or coolant, so as to prevent the marine frequency converter from overheating, keep the internal temperature of the frequency converter within a safe range, and ensure stable operation of the equipment.

[0043] The engine-side power cabinet 210 contains an engine-side power module connected to the shaft-driven generator. This module converts the three-phase AC power output from the generator into DC power. The engine-side power module contains insulated-gate bipolar transistors (IGBTs) or other types of power semiconductor devices. Alternatively, in the mode where the ship's power supply drives the motor, it converts DC power into three-phase AC power to drive the motor or other loads.

[0044] The grid-side power cabinet 220 is equipped with a grid-side power module, which, together with the engine-side power module, is used to convert the DC power output from the engine-side power module into AC power for the ship's power network.

[0045] The filter cabinet 230 is equipped with a filter module, which is connected to the grid-side power module. It is used to suppress or eliminate harmonics of the marine frequency converter, improve power quality, and protect the safe operation of the marine frequency converter and load.

[0046] It should be noted that in this embodiment, the marine frequency converter cabinet is an integral part of the internal structure and outer shell of the marine frequency converter, and the internal components and modules that constitute the marine frequency converter are installed.

[0047] In this embodiment, the layout of the marine frequency converter cabinet 10 includes, but is not limited to, a control cabinet 300, a heat dissipation cabinet 400, and at least two cabinet combinations 200, arranged symmetrically around the switch cabinet 100 to facilitate subsequent expansion of the frequency converter, such as adding unit groups. It should be noted that the two cabinet combinations 200 can be arranged in a straight line or back-to-back.

[0048] The marine frequency converter cabinet provided in the embodiments of this application includes at least two cabinet combinations comprising a generator-side power cabinet, a grid-side power cabinet, and a filter cabinet. The cabinet layout includes a symmetrical arrangement of a switch cabinet as the center, a control cabinet, a heat dissipation cabinet, and at least two cabinet combinations. The multiple cabinet combinations balance the overall load of the marine frequency converter, reducing the load requirements of the marine power generation system on each frequency converter module and improving the scalability of the marine frequency converter. By setting multiple cabinet combinations, a modular design that can be disassembled is achieved, further simplifying the design of the marine frequency converter.

[0049] In some embodiments, the circuit of the marine frequency converter includes at least two branches connected in parallel. Each branch includes a machine-side power module, a grid-side power module, and a filter module. In one example, the filter module includes at least a grid-side inductor L1, a machine-side inductor L2, and a filter capacitor C (not shown in the figure). The grid-side inductor L1 is connected between the grid-side rectifier (e.g., a diode rectifier bridge or a thyristor rectifier) ​​and the filter capacitor C. The filter capacitor C is connected between the grid-side inductor L1 and the machine-side inductor L2. The machine-side inductor L2 is connected between the filter capacitor C and the inverter (typically composed of IGBTs).

[0050] In this embodiment, in the main circuit of the marine frequency converter, each machine-side power module, grid-side power module, and filter module constitutes a unit group. The marine frequency converter includes at least two unit groups, and the at least two unit groups are connected in parallel in the circuit of the marine frequency converter.

[0051] In such Figure 2In the circuit diagram of the marine frequency converter shown, the shaft-driven generator 2100 serves as the power input source, the circuit breaker 2200 is used for circuit on / off control and circuit protection, and the engine-side power modules 2301, 2302, 2303, and 2304 are connected to the grid-side power modules 2401, 2402, 2403, and 2404, respectively. In the parallel branches of the marine frequency converter, branch 1 combines grid-side power modules 2401 and 2402, connects to the downstream filter capacitor 2601, and then connects to the external transformer 2700; branch 2 combines grid-side power modules 2403 and 2404, connects to the downstream filter capacitor 2602, and then connects to the external transformer 2700.

[0052] In this embodiment, the circuit in the marine frequency converter is divided into two branches. The current load of a single branch is reduced by half, which makes the selection of the corresponding LCL (Inductor-Capacitor-Inductor Filter) more convenient, the LCL design layout more flexible, and conducive to product expansion. After removing the corresponding power module and one branch, backward compatibility design is possible.

[0053] The marine frequency converter cabinet provided in the embodiments of this application decomposes the power cabinet, grid power cabinet, and filter cabinet of each cabinet combination into a unit group. The main circuit of the marine frequency converter includes a parallel circuit composed of at least two unit groups corresponding to at least two cabinet combinations. Multiple unit groups balance the overall load of the frequency converter, reducing the load requirements of the marine power generation system on each frequency converter module and improving the scalability of the frequency converter. By setting multiple cabinet combinations, a modular design that can be disassembled is realized, further simplifying the design of the marine frequency converter.

[0054] In some embodiments, such as Figure 3 As shown, the marine frequency converter cabinet 10 includes two cabinet combinations 200. The cabinet layout of the marine frequency converter cabinet 10 includes: with the switch cabinet 100 as the center, the two cabinet combinations (cabinet combination 201 and cabinet combination 202) are located on both sides of the switch cabinet 100. The control cabinet 300 is adjacent to one of the cabinet combinations 201, and the heat dissipation cabinet 400 is adjacent to the other cabinet combination 202. Cabinet combination 201 and cabinet combination 202 form two parallel branches to achieve load balancing for the marine frequency converter. It should be noted that the positions of the filter cabinet, the machine-side power cabinet, and the grid-side power cabinet in the cabinet combination can be set according to practical experience; the arrangement order of the cabinets in this embodiment is not limited.

[0055] In one example, such as Figure 4a as well as Figure 4b As shown, Figure 4a The middle section is a schematic diagram of the cabinet layout for a marine frequency converter. Figure 4b This is a schematic diagram of the cabinet layout to conceal the cabinet doors. The layout of the marine frequency converter cabinet 40, from left to right, consists of: control cabinet 410, filter cabinet 421, grid-side power cabinet 431, machine-side power cabinet 441, switch cabinet 450, machine-side power cabinet 432, grid-side power cabinet 442, filter cabinet 422, and heat dissipation cabinet 460, totaling nine independent cabinets. Each module has its own independent cabinet, facilitating installation and maintenance, and also improving electromagnetic compatibility and safety between modules.

[0056] like Figure 4c The schematic diagram of the marine inverter cabinet shown shows that, with switch cabinet 450 as the center, the left and right sides are the cabinet combinations corresponding to two parallel branches. The marine inverter cabinet can be broken apart from switch cabinet 450 and can be divided into two parts, the first part 50A and the second part 50B, which facilitates compatibility design and subsequent expansion of the inverter.

[0057] In one example, such as Figure 4d As shown, adding a heat dissipation cabinet 460 to the right of the 50A cabinet group in the first part can form a low-power unit cabinet, realizing a flexible layout with multiple variations based on a single design.

[0058] In some embodiments, the cabinet layout of the cabinet assembly includes, but is not limited to: the switch cabinet 100 is located on one side of the machine-side power cabinet 210, the grid-side power cabinet 220 is located on the other side of the machine-side power cabinet 210, the grid-side power cabinet 220 is located on one side of the filter cabinet 230, and the heat dissipation cabinet 300 or the control cabinet 400 is located on the other side of the filter cabinet 230.

[0059] In one example, taking a marine frequency converter cabinet with a load power of 4MW as an example, if it is disconnected from the switch cabinet, the left and right sides each have a load power of 2MW, which can quickly achieve power compatibility design for 2MW, 1.5MW and 1MW; if it is disconnected from the switch cabinet and split into two unit groups, it can meet the problem of hoisting opening restrictions in the retrofit of old ships, which is flexible and versatile.

[0060] In some embodiments, the disconnected portions of the busbars of adjacent cabinets in the marine inverter cabinet are connected by soft copper busbars; the disconnected portions of the cooling pipes of adjacent cabinets in the marine inverter are connected by pipe connector busbars.

[0061] In one example, such as Figure 5The schematic diagram of the DC busbar splicing structure shown shows that the DC busbar disconnected between the first unit group and the second unit group is connected to the DC busbar through soft copper, realizing the soft connection of the DC positive busbar and the DC negative busbar.

[0062] In yet another example, such as Figure 6 The schematic diagram of the three-phase AC busbar splicing structure shown illustrates how, in a three-phase AC circuit, the disconnected parts of the three-phase AC busbar are connected by soft copper to achieve a flexible connection of the three-phase AC busbar.

[0063] In another example, such as Figure 7 The diagram shows the pipe splicing structure. Water pipe 70 and water pipe 72 are connected by a flexible water pipe 71 through a pipe connector 700.

[0064] In some embodiments, the heat dissipation module is a water-cooled heat dissipation module. Cooling pipes filled with coolant are present in the marine inverter cabinet. The coolant is circulated by a heat pump within the heat dissipation module to achieve heat dissipation.

[0065] In some embodiments, such as Figure 8 The schematic diagram of the control cabinet layout shows that the first side of the control cabinet 300 has an external wiring terminal 3001 for connecting external equipment; the second side of the control cabinet 300 has an internal wiring terminal 3002 for connecting internal equipment of the marine frequency converter cabinet; the second side is adjacent to the filter cabinet; the control cabinet 300 houses a drive control unit (DCU) chassis 3003, which is located above the control cabinet 300; and switch control devices 3004 are located at the front of the control cabinet 300. All control devices are centrally located within the control cabinet, forming a relatively independent control unit cabinet.

[0066] In this embodiment, the control cabinet layout is well-organized and hierarchical. A standard pre-charge transformer interface is provided at the bottom of the control cabinet, and the switch control devices are located on the lower inner side of the control cabinet to ensure the independence and versatility of the control unit, enabling the design of a single control unit cabinet for multiple projects.

[0067] In some embodiments, such as Figure 9 The schematic diagram of the filter cabinet layout shows that a filter element is located in the center of the inner side of the filter cabinet 230. This filter element is used to eliminate harmonics from the marine frequency converter. The structure is symmetrically laid out, and the cabinet frame adopts a universal design. Multiple filter cabinets in the filter cabinet 230 unit group in a general-purpose frequency converter can be used as a whole. The busbar in the filter cabinet 230 is located at the bottom of the cabinet body. Figure 9 As shown, it includes reactor 2301, capacitor 2302, reactor 2303 and external wiring busbar 2304 to achieve a simplified design.

[0068] In some embodiments, the machine-side power cabinet 210 and the grid-side power cabinet 220 have the same cabinet frame structure and are provided with module installation interfaces. Figure 10 In the power cabinet layout diagram shown, the grid-side power cabinet 220 and the machine-side power cabinet 210 are of the same standard. Depending on the power requirements, only module 2010 (different power modules have completely identical interfaces) and the top fuse 2020 and the upper and lower busbars 2030 for the fuse components need to be replaced. The overall frame structure of the power cabinets is completely identical. Figure 10 As shown in the main view, the power module is located at position 2010, as... Figure 10 As shown in the left-middle view, it has an AC quick-connect busbar 2040, a water outlet 2050, and a water inlet 2060 on its side, and a reactor 2070 is installed below. It can be seen that the machine-side power cabinet and the grid-side power cabinet have the same skeleton structure. The cabinet can be modified by replacing the modules, the top fuses, and the upper and lower busbars of the fuse devices.

[0069] In some embodiments, the switch cabinet 100 includes heat dissipation components, a water receiving plate, and a plug-in terminal block. The heat dissipation components are symmetrically arranged within the switch cabinet, and the water receiving plate is disposed below the heat dissipation components. Figure 11 As shown, the heat dissipation component used in the switchgear 100 is a symmetrical air-water heat exchanger 1101. A water receiving plate 1102 is designed below the air-water heat exchanger 1101 to achieve water and electricity isolation and facilitate expansion design. A unit group plug-in terminal block 1103 is designed on the inner top of the switchgear 100 to facilitate re-parallelization within the cabinet. In addition, an organic side circuit breaker 1104 is installed in the middle of the inner side of the switchgear 100, an organic side external wiring busbar 1105 is installed on the lower inner side of the switchgear 100, and a fan 1106 is installed on the upper inner side of the switchgear 100.

[0070] In some embodiments, the heat dissipation cabinet 400 is preferably a water-cooled heat dissipation cabinet. In this embodiment, the marine inverter cabinet adopts a closed-loop circulation method, with the entire cabinet divided into three groups of internal circulation. The losses of all components inside the cabinet are carried by water to the water-cooled cabinet 360, where heat exchange occurs in a plate heat exchanger and is carried outside the cabinet, thus enhancing the heat dissipation capacity of the marine inverter cabinet. Figure 3 Taking the layout of the marine frequency converter cabinet shown in the figure as an example, its normal internal circulation diagram is as follows: Figure 12 As shown, a fan 1210 is installed in the control cabinet 300, switch cabinet 100 and water-cooled cabinet 400 respectively, and an air-water heat exchanger 1220 is installed in the two filter cabinets 230 and switch cabinet 100 respectively. The fan 1210 drives the air to flow to form an internal circulation. The heat is carried to the water-cooled cabinet 400 through the coolant, and then carried to the outside of the cabinet through the plate heat exchanger 1230 in the water-cooled cabinet 400.

[0071] According to a second aspect of the embodiments of this application, a marine power generation system is also provided, such as... Figure 13 As shown, the marine power generation system 1300 includes a marine frequency converter cabinet 1310 as described in the first aspect and a shaft generator 1320. The marine frequency converter cabinet 1310 is connected to the shaft generator 1320 and is used to convert the current output by the shaft generator 1320 into AC power corresponding to the ship's power network.

[0072] Marine power generation systems may also include transformers and energy storage systems. Transformers are used to increase or decrease the voltage generated by the generator to a suitable voltage value to meet the voltage requirements of marine equipment; energy storage systems are used to store electrical energy.

[0073] It should be understood that the terms "mechanism," "device," "component," etc., used in this application are merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they can be replaced by other expressions.

[0074] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention. In practical applications, the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification, and various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A marine frequency converter cabinet, characterized in that, The marine frequency converter cabinet includes a switch cabinet, a control cabinet, a heat dissipation cabinet, and at least two cabinet combinations. Each cabinet combination includes a machine-side power cabinet, a grid-side power cabinet, and a filter cabinet. The switch cabinet contains switching devices for controlling the on / off state of the marine frequency converter's circuitry; the control cabinet contains control devices for adjusting the output frequency and voltage of the marine frequency converter; the engine-side power cabinet contains an engine-side power module connected to the generator for converting the generator's AC output to DC; the grid-side power cabinet contains a grid-side power module connected to the engine-side power module for converting the engine-side power module's DC output to AC for the ship's power network; and the filter cabinet contains a filter module connected to the grid-side power module for eliminating harmonics from the marine frequency converter. The cabinet layout of the inverter cabinet includes a symmetrical arrangement of the control cabinet, the heat dissipation cabinet, and at least two other cabinets, with the switch cabinet as the center.

2. The marine frequency converter cabinet according to claim 1, characterized in that, The circuit of the marine frequency converter includes at least two branches, which are connected in parallel. Each branch includes the engine-side power module, the grid-side power module, and the filter module.

3. The marine frequency converter cabinet according to claim 1, characterized in that, The marine frequency converter cabinet comprises two cabinets combined, and the cabinet layout includes: With the switch cabinet as the center, two cabinet combinations are located on both sides of the switch cabinet, the control cabinet is adjacent to one of the two cabinet combinations, and the heat dissipation cabinet is adjacent to the other of the two cabinet combinations.

4. The marine frequency converter cabinet according to claim 3, characterized in that, The cabinet layout of the cabinet assembly includes: The switch cabinet is located on one side of the machine-side power cabinet, the grid-side power cabinet is located on the other side of the machine-side power cabinet, the grid-side power cabinet is located on one side of the filter cabinet, and the heat dissipation cabinet or the control cabinet is located on the other side of the filter cabinet.

5. The marine frequency converter cabinet according to claim 1, characterized in that, The disconnected parts of the busbars of adjacent cabinets in the marine frequency converter are connected by soft copper busbars; the disconnected parts of the cooling pipes of adjacent cabinets in the marine frequency converter are connected by pipe connector busbars.

6. The marine frequency converter cabinet according to claim 1, characterized in that, The control cabinet has an external wiring terminal on its first side for connecting to external devices; the control cabinet has an internal wiring terminal on its second side for connecting to the internal devices of the marine frequency converter; the second side of the control cabinet is adjacent to the filter cabinet. The control cabinet contains a drive control unit (DCU) chassis.

7. The marine frequency converter cabinet according to claim 1, characterized in that, A filter element is installed in the center of the inner side of the filter cabinet. The filter element is used to eliminate the harmonics of the marine frequency converter. A busbar is installed at the bottom of the inner side of the filter cabinet.

8. The marine frequency converter cabinet according to claim 1, characterized in that, The machine-side power cabinet has the same cabinet structure as the network-side power cabinet.

9. The marine frequency converter cabinet according to claim 1, characterized in that, The switch cabinet includes heat dissipation components, a water receiving plate, and plug-in terminal blocks, wherein... The heat dissipation components are symmetrically arranged inside the switch cabinet and connected to the cooling pipes of the marine frequency converter to cool the coolant in the cooling pipes. The water receiving plate is located below the heat dissipation component; The plug-in terminal block is located on the inner top of the switch cabinet.

10. A marine power generation system, characterized in that, Includes a marine frequency converter cabinet as described in any one of claims 1-9 and a shaft-driven generator, wherein the marine frequency converter cabinet is connected to the shaft-driven generator and is used to convert the current output by the shaft-driven generator into AC power corresponding to the ship's power network.

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