Converter

Abstract

The invention provides a converter. The converter comprises a rectifier cabinet, an electric control cabinet, an inverter cabinet, a direct-current brake cabinet, a water-cooling cabinet and a machine-side filter cabinet, wherein the rectifier cabinet, the electric control cabinet, the inverter cabinet and the direct-current brake cabinet are sequentially arranged towards a first side, the side surfaces of the rectifier cabinet, the electric control cabinet, the inverter cabinet and the direct-current brake cabinet are adjacent in pairs, the water-cooling cabinet and the machine-side filtering cabinet are arranged on the back surfaces of the rectifier cabinet, the electric control cabinet, the inverter cabinet and the direct-current brake cabinet and face a second side opposite to the first side, and an opening is formed in a back plate of the machine-side filtering cabinet. Therefore, the machine-side filtering cabinet can be maintained at the first side. In the converter, all the functional unit cabinets can realize front maintenance, and the converter is reliable in electrical connection and easy to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of energy supply, such as wind power generation and ship propulsion, and in particular to a converter. Background Art

[0002] At present, most of the converters based on IGCT (Intergrated Gate Commutated Thyristors) are relatively large and have low integration. IGCT is an ideal medium and high voltage semiconductor device. The output capacity of a single transmission unit of a converter using IGCT devices can reach 16MVA, and the capacity of a parallel unit can reach 32MVA. Applications such as offshore wind power and high-power ship propulsion have increasingly higher requirements for the power density of converters, but due to the limitation of installation size, conventional unit layout methods can no longer meet application requirements.

[0003] Therefore, it is necessary to explore a more compact layout of the converter units. Summary of the invention

[0004] The main purpose of the present invention is to provide a converter to provide a more compact converter unit arrangement.

[0005] The present invention provides a converter, comprising: a rectifier cabinet, an electric control cabinet, an inverter cabinet, a DC brake cabinet, a water cooling cabinet and a machine-side filter cabinet; wherein the rectifier cabinet, the electric control cabinet, the inverter cabinet and the DC brake cabinet are arranged in sequence toward a first side, and the sides are adjacent to each other, the water cooling cabinet and the machine-side filter cabinet are arranged on the back of the rectifier cabinet, the electric control cabinet, the inverter cabinet and the DC brake cabinet, and face a second side opposite to the first side, and an opening is provided on the back panel of the machine-side filter cabinet so that the machine-side filter cabinet can be maintained on the first side.

[0006] In one embodiment, the rectifier cabinet includes an active rectifier cabinet; the converter also includes: a grid-side filter cabinet, which is arranged on a side of the machine-side filter cabinet away from the water cooling cabinet and facing the second side, and an opening is provided on the back panel of the grid-side filter cabinet to enable maintenance of the grid-side filter cabinet on the first side.

[0007] In one embodiment, it further includes: a water cooling pipeline connected to the water cooling cabinet, and the water cooling pipeline passes through each cabinet in sequence to form a water cooling circuit.

[0008] In one embodiment, the water cooling pipeline includes: a water inlet main pipeline, which is connected to the water outlet pipe of the water cooling cabinet and passes through the lower inner side of each cabinet; a water return main pipeline, which is connected to the water inlet pipe of the water cooling cabinet and passes through the upper inner side of each cabinet; a plurality of water cooling branch pipelines, one end of each water cooling branch pipeline is connected to the water inlet main pipeline, and the other end is connected to the water return main pipeline, and the plurality of water cooling branch pipelines are used to cool the modules in each cabinet; wherein the water inlet main pipeline and the water return main pipeline respectively include multiple sections of pipelines, and the multiple sections of pipelines are connected by rigid pipe joints.

[0009] In one embodiment, it further includes: at least one water-to-air heat exchanger, which is arranged at the lower inner side of at least one cabinet and is respectively connected to the water cooling pipeline to form air circulation in the cabinet and cool the circulating air.

[0010] In one embodiment, it also includes: a hanging assembly, including a top assembly and a bottom assembly, each cabinet is arranged between the top assembly and the bottom assembly, and each cabinet is fixedly connected to the top assembly and the bottom assembly respectively, wherein the fixed connection includes a fixed connection via bolts.

[0011] In one embodiment, a lifting tool hole is opened on the top component, and the lifting tool hole is used to install a lifting support rod to lift the hand winch.

[0012] In one embodiment, a plurality of lifting rings are provided on the bottom assembly, and the lifting rings are used to lift the converter.

[0013] In one embodiment, the internal space of the electric control cabinet is divided into a front cavity and a rear cavity, and the front cavity is separated from the rear cavity by a partition hinged to the side wall of the electric control cabinet, wherein a plurality of horizontal partition layers are arranged in the front cavity, and upward universal wheels are arranged on the bottom surface of the partition layer.

[0014] The present invention provides a converter, comprising: a water cooling cabinet, two rectifier cabinets, two electric control cabinets, two inverter cabinets, two DC brake cabinets and two machine-side filter cabinets; wherein the rectifier cabinet is an uncontrolled rectifier cabinet; a rectifier cabinet, an electric control cabinet, an inverter cabinet, a DC brake cabinet and a machine-side filter cabinet are arranged in sequence toward the same side, and the sides are adjacent to each other; the two rectifier cabinets, the two electric control cabinets, the two inverter cabinets, the two DC brake cabinets and the two machine-side filter cabinets are arranged back to back respectively, and the water cooling cabinet is arranged on a side of the two rectifier cabinets away from the electric control cabinets.

[0015] In the converter of the present invention, all functional unit cabinets can be maintained from the front, with reliable electrical connections and easy maintenance; the internal circulation heat dissipation duct is adopted, the design is more compact, the heat dissipation design is reasonable, the heat dissipation performance is excellent, and the height size of the compression unit can be greatly reduced; all the panel cabinets are placed between the top component and the bottom component, and are combined together by bolts for easy disassembly and adjustment. The layout of the converter unit of the present invention can achieve high power density, easily meet the application requirements of various occasions, solve the problem of single unit difficult to install and maintain, solve the problem of back-to-back dual unit pipeline parallel connection, and the flow distribution of each component is reasonable to meet the heat dissipation requirements of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a topological diagram of a main circuit of a converter according to an embodiment of the present application;

[0018] Figure 2 is a topological diagram of a main circuit of a converter according to another embodiment of the present application;

[0019] Figure 3 is a front schematic diagram of a converter according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the back side of a converter according to an embodiment of the present application;

[0021] Figure 5 is a schematic top view of the top surface of a variable fluid according to an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of a water cooling pipeline according to an embodiment of the present application;

[0023] Figure 7 This is a schematic diagram of the appearance of a water-to-air heat exchanger according to one embodiment of the present application;

[0024] Figure 8 It is a schematic diagram of a top component and a bottom component of a hanging assembly according to an embodiment of the present application;

[0025] Fig. 9 This is a schematic diagram of installing a hand chain hoist according to an embodiment of the present application;

[0026] Fig.10 is a schematic diagram of a rectifier cabinet (inverter cabinet) according to an embodiment of the present application;

[0027] Fig.11is a schematic diagram of an electric control cabinet according to an embodiment of the present application;

[0028] Fig.12 is a schematic diagram of a universal wheel according to an embodiment of the present application;

[0029] Fig.13 A schematic diagram of an arrangement of support capacitors according to an embodiment of the present application;

[0030] Fig.14 is a schematic diagram of a DC brake cabinet according to an embodiment of the present application;

[0031] Fig.15 is a schematic diagram of a machine-side filter cabinet according to an embodiment of the present application;

[0032] Fig.16 is a schematic diagram of a grid-side filter cabinet according to an embodiment of the present application;

[0033] Fig.17 is a front schematic diagram of a converter according to another embodiment of the present application;

[0034] Fig.18 is a schematic top view of the top surface of a converter according to another embodiment of the present application;

[0035] Fig.19 Schematic diagram of a water cooling pipeline according to another embodiment of the present application. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] The converter can be arranged as a single drive unit or in parallel. Figure 1 This is the main circuit topology diagram of a single transmission unit. Figure 2 This is the main circuit topology diagram of the parallel connection mode of the unit. Based on the IGCT voltage-type AC-DC-AC converter, according to the main circuit electrical topology, the functional unit cabinet of the converter can be divided into a grid-side filter cabinet, an active rectifier cabinet, a multi-pulse rectifier cabinet (compatible with 6-pulse, 12-pulse, 18-pulse, 24-pulse, 48-pulse, etc.), a DC brake cabinet, an inverter cabinet, a machine-side filter cabinet and an electric control cabinet. Among them, the active rectifier cabinet and the inverter cabinet use IGCT devices to achieve ultra-large capacity output. The functional unit cabinets can be flexibly combined and arranged back to back to greatly reduce the size of the unit.

[0038] refer to Figures 3 to 5The present embodiment provides a converter, comprising: a rectifier cabinet 10, an electric control cabinet 20, an inverter cabinet 30, a DC brake cabinet 40, a water cooling cabinet 60 and a machine-side filter cabinet 70; the rectifier cabinet 10, the electric control cabinet 20, the inverter cabinet 30 and the DC brake cabinet 40 are arranged in sequence toward a first side, and the sides are adjacent to each other, the water cooling cabinet 60 and the machine-side filter cabinet 70 are arranged on the back of the rectifier cabinet 10, the electric control cabinet 20, the inverter cabinet 30 and the DC brake cabinet 40, and face a second side opposite to the first side, and an opening is provided on the back panel of the machine-side filter cabinet 70 so that the machine-side filter cabinet 70 can be maintained on the first side.

[0039] By arranging the functional unit cabinets back to back, the size of the unit can be reduced, which is conducive to the arrangement of the converter unit in a smaller space. Moreover, in the back-to-back arrangement, by opening the back plate of the machine-side filter, the machine-side filter can be maintained on the first side, that is, the machine-side filter cabinet at the back can be maintained through one or more cabinets of the rectifier cabinet, the electric control cabinet, the inverter cabinet and the DC brake cabinet.

[0040] refer to Figures 3 to 5 The machine-side filter cabinet 70 is located at the back of the electric control cabinet. Fig.15 This is a back view of the machine-side filter cabinet 70. It can be seen that there is no integral back panel on the back of the machine-side filter cabinet 70, so the machine-side filter cabinet 70 can be maintained through the electrical control cabinet 20. The main maintenance components of the machine-side filter cabinet 70 may include a circuit breaker 71 and a water-to-air heat exchanger 73. The external power cable connection interface 72 of the circuit breaker 71 is located on the first side (i.e., the front), and all fastening connection points of the circuit breaker 71 can be disassembled on the first side. The support plate 74 at the bottom of the circuit breaker 71 is divided into two parts, and a space is reserved in the middle for pulling out the circuit breaker 71 (with a section of the busbar); the water-to-air heat exchanger 73 is arranged below the side wall of the panel cabinet, which is extremely convenient for maintenance.

[0041] In one embodiment, the rectifier cabinet 10 includes an active rectifier cabinet; the converter further includes: a grid-side filter cabinet 80, referring to Figure 4 and Figure 5 The grid-side filter cabinet 80 is arranged on a side of the machine-side filter cabinet 70 away from the water cooling cabinet 60 and facing the second side. An opening is provided on the back panel of the grid-side filter cabinet 80 so that the grid-side filter cabinet 80 can be maintained on the first side.

[0042] refer to Figure 4 and Figure 5 The grid-side filter cabinet 80 is located on the back of the inverter cabinet 30 and the DC brake cabinet 40. Fig.16It can be seen that there is no integral back panel on the back of the grid-side filter cabinet 80, so it can be maintained through the inverter cabinet 30 and / or the DC brake cabinet 40. The main maintenance components of the grid-side filter cabinet 80 include a filter capacitor 81, a circuit breaker 82 and a maintenance switch 84. The external power cable connection interface 83 faces the first side. The maintenance method of the circuit breaker 82 is the same as that of the machine-side filter cabinet 70. The fastening points of other components are all located on the first side, which is convenient for disassembly.

[0043] The rectifier cabinet 10 is compatible with two main circuit forms: uncontrolled rectifier cabinet and active rectifier cabinet. The cabinet structure size of the uncontrolled rectifier cabinet and the active rectifier cabinet is the same. For uncontrolled rectification, 4 6-pulse rectifier modules can be arranged. For active rectification, the rectifier cabinet and the inverter cabinet are the same and can be completely interchangeable.

[0044] In one embodiment, reference Figure 6 The converter may further include: a water cooling pipeline connected to the water cooling cabinet 60, wherein the water cooling pipeline passes through each cabinet in sequence to form a water cooling circuit.

[0045] In the related art, auxiliary heat dissipation mostly adopts external circulation, but the cabinet is generally high, making it difficult to arrange and maintain the water cooling pipeline. The present embodiment adopts internal circulation of the water cooling pipeline, which is conducive to the arrangement and maintenance of the water cooling pipeline.

[0046] In one embodiment, the water cooling pipeline includes: an inlet main pipeline 95, which is connected to the water outlet pipe of the water cooling cabinet 60 and passes through the inner lower side of each cabinet; a return main pipeline 92, which is connected to the water inlet pipe of the water cooling cabinet 60 and passes through the inner upper side of each cabinet; a plurality of water cooling branch pipelines, one end of each water cooling branch pipeline is connected to the inlet main pipeline 95, and the other end is connected to the return main pipeline 92, and the plurality of water cooling branch pipelines are used to cool the modules in each cabinet; wherein the inlet main pipeline 95 and the return main pipeline 93 respectively include multiple sections of pipelines, and the multiple sections of pipelines are connected by rigid pipe joints.

[0047] refer to Figure 6 The water cooling branch pipeline may include an inlet pipe branch 94 and a return pipe branch 93, and the inlet pipe branch 94 and the return pipe branch 93 may be connected by a hose. A small water channel joint 96 may be reserved on the inlet main pipe 95 and the return main pipe 92. The inlet main pipe 95 and the return main pipe 92 are formed by connecting multiple sections of water pipes through a rigid pipe joint 91, which is conducive to the installation and connection of the cooling pipes, and can avoid the problem of difficult installation and maintenance of heterogeneous pipes in the limited space of each functional unit cabinet of the converter.

[0048] In one embodiment, reference Figure 3 and Figure 4The converter may further include: at least one water-to-air heat exchanger HE, arranged at the lower inner side of at least one cabinet, respectively connected to the water cooling pipeline, for forming air circulation in the cabinet and cooling the circulating air. Figure 7 This is a schematic diagram of the appearance of a water-to-air heat exchanger. The water-to-air heat exchanger can be an integrated water-to-air heat exchanger in which the fan and the heat exchanger are integrated together. Compared with the separate form of the fan and the heat exchanger, it has a more compact size and higher heat dissipation efficiency, which is beneficial to improving the power density of the IGCT converter.

[0049] For example, refer to Figure 3 and Figure 4 A first water-to-air heat exchanger HE may be arranged below the side wall of the electric control cabinet 20 close to the rectifier cabinet 10 to form an air circulation (internal circulation one) in the electric control cabinet 20 and the rectifier cabinet 10, a second water-to-air heat exchanger HE may be arranged below the side wall of the inverter cabinet 30 close to the DC brake cabinet 40 to form an air circulation (internal circulation two) in the inverter cabinet 30 and the DC brake cabinet 40, and a third water-to-air heat exchanger HE may be arranged below the side wall of the machine-side filter cabinet 70 close to the grid-side filter cabinet 80 to form an air circulation (internal circulation three) in the machine-side filter cabinet 70 and the grid-side filter cabinet 80.

[0050] In one embodiment, reference Figure 8 The converter may further include: a lifting assembly, including a top assembly 51 and a bottom assembly 53, each cabinet is arranged between the top assembly 51 and the bottom assembly 53, each cabinet is fixedly connected to the top assembly 51 and the bottom assembly 53 respectively, wherein the fixed connection includes a fixed connection through bolts.

[0051] The cabinets can be assembled together by means of a lifting assembly, wherein the top assembly 51 can be assembled together by means of bolts, so as to facilitate adjustment during assembly, and the bottom assembly 53 can be assembled together by means of welding, and the functional unit cabinets can be fixed between the top assembly 51 and the bottom assembly 53 by means of bolts.

[0052] In one embodiment, reference Fig. 9 A lifting tool hole 54 is opened on the top component 51, and the lifting tool hole 54 is used to install a lifting support rod 55 to lift a hand winch 56.

[0053] refer to Figure 8 The top assembly is provided with a lifting tool hole 54 for the module to be lowered into the cabinet. The lifting support rod 55 is installed on the lifting tool hole 54, and the module can be lowered into the cabinet by the hand chain hoist 56. Fig.10The hoisting hoist is used to lift the module to be placed in the unit function cabinet, so that the module can be placed on the guide rail in the cabinet and then pushed into the functional unit cabinet. For the power cabinet (rectifier cabinet 10 and inverter cabinet 30), the fixing and electrical connection of the power module can be disassembled from the front. For general faults, the power module can also be maintained without leaving the cabinet, thus realizing full front maintenance of the power cabinet.

[0054] In one embodiment, reference Figure 8 A plurality of lifting rings 52 are provided on the bottom component 53, and the lifting rings 52 are used to lift the converter.

[0055] refer to Figure 8 The bottom component 53 can be rectangular as a whole (or other required shapes), and the long side and short side of the rectangle can be respectively provided with lifting rings 52. The converter can be lifted by the lifting rings 52 on the bottom component 53, and the position of the lifting rings 52 can be flexibly set according to the overall center of gravity position of the converter.

[0056] This implementation achieves a flexible lifting design for ultra-large weight and ultra-large size converters. The lifting tooling holes reserved on the top can realize module lifting and maintenance without the aid of an external tooling vehicle, which is simple and easy.

[0057] In one embodiment, reference Fig.11 The internal space of the electric control cabinet 20 is divided into a front cavity and a rear cavity, and the front cavity is separated from the rear cavity by a partition hinged to the side wall of the electric control cabinet, wherein a plurality of horizontal partition layers are arranged in the front cavity, and an upward universal wheel 26 is arranged on the bottom surface of the partition layer.

[0058] refer to Fig.11 For the electric control cabinet, the electric control unit is arranged in the front cavity and the capacitor is arranged in the rear cavity. In order to achieve isolation between strong and weak electricity, the front cavity is designed as a separate closed cavity. In order to maintain the rear capacitor, the front cavity and the rear cavity can be separated by an openable hinged door, thereby realizing full front maintenance of the electric control cabinet.

[0059] refer to Fig.11 The front cavity may be provided with a DCU (Drive Control Unit) 21, an auxiliary power supply 22 and an external weak current electrical interface 23. Since the electric control cavity is large and heavy, the electric control cavity may be divided into multiple parts to reduce the deformation of the sheet metal parts, and a universal wheel device 26 (such as Fig.12 ), when the electric control cavity contacts the cabinet, it can be pushed into the preset position very smoothly, saving manpower. Support capacitors (such as Fig.13) and the DC connection busbar 24, low-inductance busbars 243 can be arranged on both sides of the cabinet to ensure that the inductance of the DC connection is as low as possible. By removing the fastening bolts on the front, the support capacitor 241 can be disassembled, and the maintenance of a single capacitor can be quickly achieved. If the DC capacitor needs to be expanded, it can also be placed directly side by side, and the electrical performance will not be affected, so it is very convenient to expand the capacity of the inverter. An integrated water-air heat exchanger 25 can also be set under the side wall of the electric control cabinet.

[0060] refer to Fig.14 For the DC brake cabinet 40, the main maintenance components may include a grounding switch 41 and a chopper module 42. The external power cable connection interface 43 is located on the first side (directly in front), and the relevant fastening connection points of the grounding switch 41 and the chopper module 42 are on the first side, which can be easily disassembled.

[0061] refer to Fig.17 and Fig.18 The present embodiment provides a converter, comprising: a water cooling cabinet 60, two rectifier cabinets 10, two electric control cabinets 20, two inverter cabinets 30, two DC brake cabinets 40 and two machine-side filter cabinets 70; wherein the rectifier cabinet 10 is an uncontrolled rectifier cabinet; a rectifier cabinet 10, an electric control cabinet 20, an inverter cabinet 30, a DC brake cabinet 40 and a machine-side filter cabinet 70 are arranged in sequence toward the same side, and the sides are adjacent to each other; two rectifier cabinets 10, two electric control cabinets 20, two inverter cabinets 30, two DC brake cabinets 40 and two machine-side filter cabinets 70 are arranged back to back respectively, and the water cooling cabinet 60 is arranged on the side of the two rectifier cabinets 10 away from the electric control cabinet 20.

[0062] Fig.19 This is a schematic diagram of the internal cooling pipeline of this embodiment. A U-shaped elbow is used to realize the series connection of the cooling pipelines of the two units. The length of the units after parallel connection is reduced by nearly half compared with the straight line arrangement, which is extremely beneficial for installation in a circular tower or cabin.

[0063] Traditional IGCT-based converter solutions are generally arranged in a row, the unit size is very long, and front and back maintenance is required. For offshore wind power, ship electric propulsion and other occasions with compact installation space, this method cannot meet the actual engineering application. The converter unit layout scheme proposed in this application can be applied to both single drive and unit parallel application, and it has well realized DC low-inductance connection and full front maintenance of key components, and has been verified and realized in actual application.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. When the terms "include" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0065] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0066] It should be understood that the exemplary embodiments in this specification can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps. These embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art, and should not be construed as limitations on the present invention.

[0067] Although the spirit and principle of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined to benefit, and such division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims.

Claims

1. A converter, characterized in that: include: Rectifier cabinet, electric control cabinet, inverter cabinet, DC brake cabinet, water cooling cabinet and machine-side filter cabinet; The rectifier cabinet, the electric control cabinet, the inverter cabinet and the DC brake cabinet are arranged in sequence toward the first side, and the sides are adjacent to each other; the water cooling cabinet and the machine-side filter cabinet are arranged on the back of the rectifier cabinet, the electric control cabinet, the inverter cabinet and the DC brake cabinet, and face the second side opposite to the first side; an opening is provided on the back panel of the machine-side filter cabinet so that the machine-side filter cabinet can be maintained on the first side.

2. The converter according to claim 1, characterized in that: The rectifier cabinet includes an active rectifier cabinet; The converter further comprises: A grid-side filter cabinet is arranged on a side of the machine-side filter cabinet away from the water cooling cabinet and facing the second side. An opening is provided on the back panel of the grid-side filter cabinet so that the grid-side filter cabinet can be maintained on the first side.

3. The converter according to claim 1, characterized in that: Also includes: The water cooling pipeline is connected to the water cooling cabinet, and the water cooling pipeline passes through each cabinet in sequence to form a water cooling circuit.

4. The converter according to claim 3, characterized in that: The water cooling pipeline comprises: A water inlet main line is connected to the water outlet pipe of the water cooling cabinet and passes through the inner bottom of each cabinet body; A water return main line is connected to the water inlet pipe of the water cooling cabinet and passes through the upper inner side of each cabinet body; A plurality of water-cooling branch pipes, one end of each water-cooling branch pipe is connected to the water inlet main pipe, and the other end is connected to the water return main pipe, and the plurality of water-cooling branch pipes are used to cool the modules in each cabinet; Wherein, the water inlet main line and the water return main line respectively include multiple sections of pipelines, and the multiple sections of pipelines are connected by rigid pipe joints.

5. The converter according to claim 3, characterized in that: Also includes: At least one water-to-air heat exchanger is arranged at the lower inner side of at least one cabinet and is respectively connected to the water cooling pipelines for forming air circulation in the cabinet and cooling the circulating air.

6. The converter according to claim 1, characterized in that: Also includes: The hanging assembly comprises a top assembly and a bottom assembly, each cabinet is arranged between the top assembly and the bottom assembly, each cabinet is fixedly connected to the top assembly and the bottom assembly respectively, wherein the fixed connection comprises a fixed connection through bolts.

7. The converter according to claim 6, characterized in that A lifting tool hole is opened on the top component, and the lifting tool hole is used to install a lifting support rod to lift the hand winch.

8. The converter according to claim 6, characterized in that The bottom component is provided with a plurality of lifting rings, and the lifting rings are used for lifting the converter.

9. The converter according to claim 1, characterized in that: The internal space of the electric control cabinet is divided into a front cavity and a rear cavity, wherein the front cavity is separated from the rear cavity by a partition hinged to the side wall of the electric control cabinet, wherein a plurality of horizontal partition layers are arranged in the front cavity, and upward universal wheels are arranged on the bottom surface of the partition layers.

10. A converter, characterized in that: include: Water cooling cabinet, two rectifier cabinets, two electric control cabinets, two inverter cabinets, two DC brake cabinets and two machine-side filter cabinets; Among them, the rectifier cabinet is an uncontrolled rectifier cabinet; a rectifier cabinet, an electric control cabinet, an inverter cabinet, a DC brake cabinet and a machine-side filter cabinet are arranged in sequence toward the same side, and the sides are adjacent to each other; two rectifier cabinets, two electric control cabinets, two inverter cabinets, two DC brake cabinets and two machine-side filter cabinets are arranged back to back respectively, and the water cooling cabinet is arranged on the side of the two rectifier cabinets away from the electric control cabinet.

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