A compact high-capacity high-voltage frequency converter power cabinet

Abstract

The application discloses a compact high-capacity high-voltage frequency converter power cabinet, which comprises a cabinet body module, a placing space arranged in the cabinet body module, an integrated module, a supporting unit, a power unit, a waterway unit, a rectifier side cascade row, a rectifier side cable, a rectifier side supporting unit, an inverter side cascade row and an inverter side supporting unit arranged in the placing space, and the cabinet body module and the integrated module are integrated. The application can not only meet the high heat dissipation requirement of a large-capacity project, but also has a more compact structure, occupies a smaller area, and has a clear and simple structure, so that the power module unit is convenient to install and maintain, and the problems of a large number of cables and complex laying are effectively solved.

Description

Technical Field

[0001] This invention specifically relates to a compact, high-capacity high-voltage frequency converter power cabinet for use in equipment such as fans and pumps in power plants, which optimizes energy use by adjusting the speed. Background Technology

[0002] High-voltage frequency converters, as efficient power regulation devices, operate based on the high-speed switching action of power semiconductor devices, enabling them to flexibly convert conventional power frequency into power output at various frequencies. Conventional high-voltage frequency converters mainly consist of a transformer module and multiple power units working together. Increasing the output voltage level often requires increasing the number of power units, directly leading to a larger device size. To control the device's size and avoid increasing the footprint, a common design employs a compact layout where transformers and power units are vertically stacked. This stacking design results in a non-linear arrangement, complicating the electrical connection paths between power units, increasing the difficulty of internal wiring, and placing higher demands on the design precision and subsequent maintenance of the equipment.

[0003] Patent CN118868643A discloses a high-voltage frequency converter power cabinet, which includes multiple cabinets and multiple integrated modules housed within the cabinets. Each integrated module includes a support unit, a power unit, a water cooling unit, and inlet / outlet wiring units. Both the support unit and the power unit are multi-layered, with each layer's power unit positioned above the support unit. The water cooling unit connects the power unit to a water chiller for water circulation cooling of the power unit. The inlet / outlet wiring units include multiple cables connected to the power units. This invention's high-voltage frequency converter power cabinet, by incorporating multiple cabinets and integrated modules, not only improves space utilization but also simplifies the internal structure, resulting in a more compact design. The use of water cooling units in conjunction with a water chiller for power unit cooling provides excellent heat dissipation. Furthermore, optimized wiring paths reduce cable crossings and congestion, making wiring simpler, more intuitive, and easier to maintain and upgrade. The number of cabinets and integrated modules can be configured according to actual engineering needs, making it widely applicable and highly versatile.

[0004] While the patent with publication number CN118868643A works well for smaller capacity projects, it reveals several limitations when faced with projects requiring significantly larger capacities at the same voltage. In large-capacity projects, system current increases dramatically, necessitating the use of larger and more numerous cables on the rectifier side. This increases laying complexity and places higher demands on spatial layout and heat dissipation design. The inverter-side copper busbars need to be enlarged to handle the high current, and changes in size may affect electromagnetic compatibility and heat dissipation performance. Furthermore, the power unit generates a surge in heat in large-capacity projects, rendering the existing water pipe diameter and layout insufficient for heat dissipation. Adjustments to the water pipe diameter or a redesign of the routing and layout are required to ensure that the coolant can more evenly and quickly remove the heat generated by the module. Summary of the Invention

[0005] The purpose of this invention is to provide a compact, high-capacity high-voltage frequency converter power cabinet. By optimizing the layout of the main water pipe, the rectifier-side cooling water pipe, and the inverter-side cooling water pipe, the water circuit unit can ensure cooling efficiency to meet the heat dissipation requirements of large capacity while taking into account the convenience of equipment maintenance and the utilization rate of cabinet space.

[0006] This invention provides a compact, high-capacity high-voltage frequency converter power cabinet, comprising multiple cabinet modules and multiple integrated modules disposed within the cabinet modules; the integrated modules include: Power unit, The cascaded arrays on the rectifier side and the cascaded arrays on the inverter side are arranged on the front and rear sides of the power unit; Waterway unit, including: The main water pipe is located above the rear side of the power unit and connected to the water chiller; The rectifier-side cooling water pipe and the inverter-side cooling water pipe are respectively arranged on the left and right sides of the power unit; the rectifier-side cooling water pipe is used to connect the main water pipe and the rectifier-side cooling interface of the power unit; the inverter-side cooling water pipe is used to connect the main water pipe and the inverter-side cooling interface of the power unit.

[0007] Optionally, the rectifier-side cooling water pipe includes a rectifier-side main water pipe and a rectifier-side branch water pipe; the rectifier-side main water pipe is connected to the main water pipe; one end of the rectifier-side branch water pipe is connected to the rectifier-side main water pipe, and the other end is connected to the rectifier-side cooling interface of the power unit; the inverter-side cooling water pipe includes an inverter-side main water pipe and an inverter-side branch water pipe, the inverter-side main water pipe is connected to the main water pipe; one end of the inverter-side branch water pipe is connected to the inverter-side main water pipe, and the other end is connected to the inverter-side cooling interface of the power unit.

[0008] Optionally, the inverter-side branch water pipe has the same diameter as the rectifier-side branch water pipe; the inverter-side main water pipe has the same diameter as the rectifier-side main water pipe; the ratio of the inverter-side branch water pipe to the inverter-side main water pipe diameter is 16:25; and the ratio of the inverter-side main water pipe diameter to the main water pipe diameter is 5:16.

[0009] Optionally, the water pipes on the rectifier side branch and the water pipes on the rectifier side main, as well as the water pipes on the inverter side branch and the water pipes on the inverter side main, are connected by a flexible joint mechanism. Valves are used to connect the main water pipes on the rectifier side and the main water pipes on the inverter side.

[0010] Optionally, it also includes: The incoming and outgoing line unit includes multiple cables, which are connected to the power unit; the bottom of the cabinet module is provided with multiple waist holes, and each cable passes through the corresponding waist hole to pass through the cabinet module.

[0011] Optionally, it also includes: The support unit includes an insulating beam, a guide rail fixed to the insulating beam, and a limiting member; the power unit is arranged on the guide rail via rollers, and the power unit is fixed to the limiting member at the front and rear to restrict the movement of the power unit in the front-rear direction.

[0012] Optionally, it also includes: The rectifier-side support unit includes a first rectifier-side support unit and a second rectifier-side support unit; the first rectifier-side support unit is fixed on the cabinet module, and one end of the second rectifier-side support unit is connected to the first rectifier-side support unit, and the other end is connected to the rectifier-side cascade row.

[0013] Optionally, it also includes: Inverter-side support units are arranged on both sides of the power unit. The inverter-side support unit includes an L-shaped insulating profile. The vertical side of the L-shaped insulating profile is connected to the inverter-side cascade row, while the horizontal side is fixed to the channel steel of the insulating beam or cabinet module.

[0014] Optionally, the cabinet module has a first accommodating space, a second accommodating space and a third accommodating space distributed along the height direction, and a power unit is arranged in each of the first accommodating space, the second accommodating space and the third accommodating space; The rectifier-side cascade includes a rectifier-side cascade, a rectifier-side cascade, and a rectifier-side cascade. The first rectifier-side cascade row corresponds to the power unit in the first accommodating space; the second rectifier-side cascade row corresponds to the power unit in the second accommodating space; and the third rectifier-side cascade row corresponds to the power unit in the third accommodating space. The rectifier-side cascade rows are connected to the power units, and the rectifier-side cables are connected to the rectifier-side cascade rows.

[0015] Optionally, each power unit is connected to multiple cables in a single phase; the four rectifier-side cables of a single phase of a single power unit are arranged in a "field" shape, and the rectifier-side cables are connected to the rectifier-side cascade in a clamping manner. The rectifier-side cables connected to the power units in the first, second, and third accommodating spaces adopt the first, second, and third arrangement forms, respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, for the water circuit unit, effectively achieves efficient delivery of the cooling medium by arranging the rectifier-side and inverter-side cooling water pipes on both sides of the power unit. Furthermore, the optimized layout of placing the main water pipe on the upper rear side of the power unit (top rear of the cabinet) fully utilizes the internal space and provides ample operating space for the maintenance and repair of the power unit. The entire cabinet module can be pulled out for maintenance. The optimized water circuit unit ensures cooling efficiency to meet the demands of large-capacity heat dissipation while also balancing ease of equipment maintenance and efficient use of internal space.

[0017] 2. The high-voltage frequency converter power cabinet provided by the present invention not only improves space utilization by setting up multiple cabinets and integrated modules, but also simplifies the internal structure and makes the structure more compact; it adopts a water circuit unit in conjunction with a water chiller to dissipate heat from the power unit, resulting in good heat dissipation effect; at the same time, by optimizing the wiring path, it reduces cable crossing and congestion, making the wiring simpler, more intuitive, and easier to maintain and upgrade.

[0018] 3. The high-voltage frequency converter power cabinet provided by this invention can be configured with the number of cabinets and integrated modules according to actual engineering needs, and has a wide range of applications and strong versatility. Attached Figure Description

[0019] Figure 1 This is a side view of the overall structure of the high-voltage frequency converter power cabinet in Example 1, showing the rectifier side view.

[0020] Figure 2 The image shows the inverter side view of the overall structure of the high-voltage frequency converter power cabinet in Example 1.

[0021] Figure 3 This is a schematic diagram of a single cabinet module of the high-voltage frequency converter power cabinet in Example 1.

[0022] Figure 4 This is a schematic diagram of the spatial partitioning of a single cabinet module in the high-voltage frequency converter power cabinet in Example 1.

[0023] Figure 5 This is a schematic diagram of the support unit for the high-voltage frequency converter power cabinet in Example 1.

[0024] Figure 6This is a schematic diagram of the power unit of the high-voltage frequency converter power cabinet in Example 1.

[0025] Figure 7 This is a schematic diagram of the water circuit unit of the high-voltage frequency converter power cabinet in Example 1.

[0026] Figure 8 This is a schematic diagram of the primary input and output line unit of the high-voltage frequency converter power cabinet in Example 1.

[0027] Figure 9 This is a left-side view of the power cabinet of the high-voltage frequency converter in Example 1, showing the internal structure of the cabinet module.

[0028] Figure 10 This is a schematic diagram of the inverter side cascade and support unit of the high-voltage frequency converter power cabinet in Example 1.

[0029] Figure 11 This is a schematic diagram of the cascaded row and support unit of the rectifier side of the high-voltage frequency converter power cabinet in Example 1.

[0030] Figure 12 This is a schematic diagram of the rectifier side cable of the high-voltage frequency converter power cabinet in Example 1.

[0031] Numbering on the map: 100. Cabinet Module; 101. Double Door; 102. Fan; 103. Waist Hole; 200. Integrated Module; 201. Support Unit; 201a. Insulating Beam; 201b. Guide Rail; 201c. Limiting Component; 202. Power Unit; 203. Water Circuit Unit; 203a. Main Water Pipe; 203b. Inverter Side Main Water Pipe; 203c. Rectifier Side Main Water Pipe; 203d. Inverter Side Branch Water Pipe; 203e. Rectifier Side Branch Water Pipe; 204. Rectifier Side Cascading Row; 204-A. First Rectifier Side Cascading Row; 204-B. Second Rectifier Side Cascading Row; 204-C. Third Rectifier Side Cascading Row; 205. Rectifier Side Cable; 206. Rectifier Side Support Unit; 207. Inverter Side Cascading Row; 208. Inverter Side Support Unit. Detailed Implementation

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0034] To make the purpose, technical solution and advantages of this invention patent clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] like Figures 1-2 As shown, a compact, high-capacity high-voltage frequency converter power cabinet consists of five cabinet modules 100 and an integrated module 200. Combined with... Figure 3 Each cabinet module 100 has an internal placement space S. The integrated module 200 includes a support unit 201, a power unit 202, a water circuit unit 203, a rectifier-side cascade 204, a rectifier-side cable 205, a rectifier-side support unit 206, an inverter-side cascade 207, and an inverter-side support unit 208, all disposed within the placement space S. The number of cabinet modules and integrated modules in the high-voltage inverter power cabinet is configured according to engineering requirements. This specific embodiment serves as an example, demonstrating a high-voltage inverter power cabinet composed of 5 cabinet modules.

[0036] The cabinet module 100 adopts an axisymmetric structure, with channel steel and profiles serving as the main supporting materials for the frame. Ribs are added at the welded joints of the channel steel and profiles to enhance the strength and stability of the welded areas, ensuring the robustness and durability of the entire basic frame. This allows it to withstand significant external forces and vibrations generated by the operation of internal equipment, providing a reliable support structure for the cabinet module 100. Both the front and rear sides of the cabinet module 100 are equipped with explosion-proof double doors 101. These doors effectively prevent the outward spread of blast waves in the event of an accident inside the cabinet, ensuring the safety of the surrounding environment and personnel, and also facilitating access for maintenance and repair. The double doors 101 are equipped with ventilation holes and warning signs. The ventilation holes not only ensure good ventilation and heat dissipation inside the cabinet but also effectively prevent the entry of dust and foreign objects. Multiple fans 102 are installed at the top of the cabinet module 100. These fans draw air from inside the cabinet to the outside, further removing heat. This heat dissipation method effectively reduces the internal temperature, ensuring that the equipment inside operates in a suitable temperature environment. Multiple waist holes 103 are provided at the bottom rear of the cabinet module 100 to facilitate cable entry and exit. As the skeleton and outer shell of the entire power cabinet, the cabinet module 100, through reasonable material selection and structural design, ensures that it can withstand significant external forces and vibrations generated by the operation of internal equipment. Regarding heat dissipation, a combination of multiple heat dissipation methods is used to effectively reduce the internal temperature. For ease of operation, explosion-proof double doors and a reasonable cable entry and exit design facilitate maintenance and repair by operators. Furthermore, the axisymmetric structural design not only enhances the overall aesthetics but also reflects the scientific and rational design principles.

[0037] Combination Figure 3 and Figure 4 The cabinet module 100 has internal placement spaces S, which include a first accommodating space A, a second accommodating space B, and a third accommodating space C. Space S is layered using channel steel to form the first accommodating space A, the second accommodating space B, and the third accommodating space C, providing a stable and reliable installation environment for each unit of the integrated module 200. This layered design not only improves space utilization but also facilitates independent maintenance and rapid replacement of each component.

[0038] The integrated module 200 is disposed in the placement space S. The integrated module 200 includes key components such as a support unit 201, a power unit 202, a water circuit unit 203, a rectifier-side cascade 204, a rectifier-side cable 205, a rectifier-side support unit 206, an inverter-side cascade 207, and an inverter-side support unit 208. They work together to achieve efficient conversion and stable operation of the high-voltage frequency converter.

[0039] Combination Figure 5Furthermore, the support unit 201 includes an insulating beam 201a, a guide rail 201b, and a limiting member 201c, wherein the guide rail 201b and the limiting member 201c are fixed on the insulating beam 201a. The insulating beam 201a is arranged on the layered channel steel of the first accommodating space A, the second accommodating space B, and the third accommodating space C, maintaining an axisymmetric structure and providing a stable support platform for the entire integrated module. Figure 6 The power unit 202 has rollers at its bottom, and the guide rail 201b is machined from a profile. The power unit 202 is arranged on the guide rail 201b. This combination improves the installation efficiency of the power unit and reduces the difficulty of parts processing. The power unit 202 is fixed to the front and rear of the limiting member 201c respectively. The limiting member 201c is used to restrict the horizontal movement of the power unit to prevent it from shaking or falling off during operation.

[0040] Combination Figure 7 The water circuit unit 203, as a core component of the power cabinet thermal management system, employs a hierarchical water circuit design to construct an efficient heat transfer system. The water circuit unit 203 includes a main water pipe 203a, an inverter-side main water pipe 203b, a rectifier-side main water pipe 203c, an inverter-side branch water pipe 203d, and a rectifier-side branch water pipe 203e. The power unit 202 is connected to the inverter-side branch water pipe 203d and the rectifier-side branch water pipe 203e respectively; the rectifier-side branch water pipe 203e is connected to the rectifier-side main water pipe 203c, and the rectifier-side main water pipe 203c is connected to the main water pipe 203a; the inverter-side branch water pipe 203d is connected to the inverter-side main water pipe 203b, and the inverter-side main water pipe 203b is connected to the main water pipe 203a; the main water pipe 203a is connected to the water chiller. This design forms a closed-loop cooling system with a tree-like topology. Each power unit 202 is seamlessly connected to its corresponding branch water pipes through precisely arranged interfaces, ensuring that the heat generated by the heat-generating components can be quickly absorbed by the cooling medium and conducted to the main circulation system. This modular water circuit architecture not only achieves directional heat transfer and balanced distribution, but its hierarchical control features also facilitate system maintenance and localized repairs. By optimizing the pipe routing and cross-sectional design, the system significantly improves cooling efficiency while minimizing flow resistance, enabling the power cabinet to maintain a stable operating temperature even under continuous high load operation or extreme ambient temperature conditions, providing a crucial guarantee for the long-term reliable operation of the equipment.

[0041] The inverter-side branch water pipe 203d has the same diameter as the rectifier-side branch water pipe 203e; the inverter-side main water pipe 203b has the same diameter as the rectifier-side main water pipe 203c; the diameter ratio of the inverter-side branch water pipe 203d to the inverter-side main water pipe 203b is 16:25; the diameter ratio of the inverter-side main water pipe 203b to the main water pipe 203a is 5:16.

[0042] The inverter-side branch water pipe 203d is connected to the inverter-side main water pipe 203b using a union mechanism, while the inverter-side main water pipe 203b is connected to the main water pipe 203a using a valve; the rectifier-side water pipes are connected in the same way.

[0043] The water circuit unit 203 adopts a modular piping design, forming an efficient spatial layout within the cabinet module 100. Viewed from the front of the cabinet module 100, the inverter-side main water pipe 203b and inverter-side branch water pipe 203d are arranged on one side of the cabinet module 100; the rectifier-side main water pipe 203c and rectifier-side branch water pipe 203e are arranged on the other side of the cabinet module 100. The main water pipe 203a is located at the top rear of the cabinet module 100. This fully utilizes the internal space and also meets the requirement of completely removing the cabinet module 100 for maintenance of the power unit 202. This symmetrical piping arrangement not only achieves efficient delivery of the cooling medium but also, through the optimized layout of placing the main water pipe 203a at the top rear of the cabinet, fully utilizes the internal three-dimensional space while providing ample operating space for the maintenance of the power unit 202. The combined use of unions and valves ensures both the reliability of pipeline connections and the need for maintenance by removing the entire power unit, reflecting a thorough consideration of equipment maintainability in the design. The spatial planning and connection design of the entire water system perfectly balances the convenience of equipment maintenance and the optimization of cabinet space utilization while ensuring cooling efficiency.

[0044] Combination Figure 8 and Figure 9 Viewed from the left side of cabinet module 100, the rectifier-side cascade 204, rectifier-side cable 205, and rectifier-side support unit 206 are arranged on the left side of cabinet module 100; the inverter-side cascade 207 and inverter-side support unit 208 are arranged on the right side of cabinet module 100.

[0045] Combination Figure 10 The inverter-side support unit 208 has an L-shaped insulating profile. Its vertical side is connected to the inverter-side cascade row 207, while its horizontal side is fixed to the insulating beam 201a or the channel steel of the cabinet module 100, forming a stable three-dimensional support system. The inverter-side support unit 208 is arranged on both sides of the power unit 202, without affecting the maintenance of the power unit 202.

[0046] Combination Figure 11, the rectification side cascaded busbar 204 comprises a first rectification side cascaded busbar 204-A, a second rectification side cascaded busbar 204-B and a third rectification side cascaded busbar 204-C. One power unit 202 is respectively arranged in each of the first accommodation space A, the second accommodation space B and the third accommodation space C. The first rectification side cascaded busbar 204-A corresponds to the power unit 202 in the first accommodation space A; the second rectification side cascaded busbar 204-B corresponds to the power unit 202 in the second accommodation space B; the third rectification side cascaded busbar 204-C corresponds to the power unit 202 in the third accommodation space C. The rectification side cascaded busbar 204 is connected with the power unit 202, and the rectification side cable 205 is connected with the rectification side cascaded busbar 204.

[0047] combination of Figure 12 , for high-capacity projects, a single phase of a single power unit 202 needs to be connected with a plurality of cables. In the present case, discussion is carried out on the condition that a single phase of a single power unit 202 is connected with 4 rectification side cables 205, a single power unit 202 is connected with 12 rectification side cables 205, and a total of 36 rectification side cables 205 are arranged in a single cabinet module 100.

[0048] Four rectification side cables 205 of a single phase of a single power unit 202 are arranged in a "field" shape, and the rectification side cables 205 and the rectification side cascaded busbar 204 adopt an opposite clamping mode, that is, 2 rectification side cables 205 are arranged side by side on a single side of the copper busbar. When viewed from the top of the cabinet module 100, 12 cables in the first accommodation space A are arranged in a "pin" shape, with a total of 12 cables; 12 cables in the second accommodation space B are arranged in an inverted "pin" shape, with a total of 12 cables; 12 cables in the third accommodation space C are arranged in a "」" shape, with a total of 12 cables. The 36 rectification side cables 205 are divided into 3 groups and arranged in a line.

[0049] The rectification side cables 205 respectively pass out from three waist holes at the bottom of the cabinet module 100, and are respectively connected with the A, B and C three-phase copper busbars at the rectification side of the power unit 202. The three-phase cables are separated through the three waist holes at the bottom, so that mutual interleaving of cables between different phases is avoided. Cable clamps are installed on channel steel of the cabinet module 100 to fix the three-phase cables. The mode of naturally vertical arrangement of the cables not only reduces mechanical stress, but also forms an efficient heat dissipation channel from bottom to top in cooperation with forced convection of a top fan. This layout design makes the cable routing intuitive and clear, and the phase sequence marks striking, which not only meets the safety requirement of insulation level, but also provides convenient maintenance space for daily maintenance. Through structured space planning and thermal management design, the entire system realizes reliable operation under high current density in limited cabinet space.

[0050] The rectifier-side support unit 206 has a U-shaped insulating profile structure and includes a first rectifier-side support unit and a second rectifier-side support unit. The first rectifier-side support unit is fixed on the channel steel of the cabinet module 100. One end of the second rectifier-side support unit is connected to the first rectifier-side support unit, and the other end of the second rectifier-side support unit is connected to the rectifier-side cascade row 204.

[0051] In summary, the high-voltage frequency converter power cabinet design of this invention, through modular and integrated design, not only improves the installation efficiency and maintenance convenience of the equipment, but also significantly enhances the performance and reliability of the power cabinet by optimizing the heat dissipation and water circuit systems. This design meets the high standards required for high-voltage frequency converters in modern industrial applications, providing a more efficient, stable, and safe power conversion solution for power systems.

[0052] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A compact, high-capacity high-voltage frequency converter power cabinet, comprising multiple cabinet modules (100) and multiple integrated modules (200) disposed within the cabinet modules (100); characterized in that: The integrated module includes: Power unit (202). The cascaded array on the rectifier side (204) and the cascaded array on the inverter side (207) are arranged on the front and rear sides of the power unit; Waterway unit, including: The main water pipe (203a) is located above the rear side of the power unit (202) and connected to the water chiller; The rectifier-side cooling water pipe and the inverter-side cooling water pipe are respectively arranged on the left and right sides of the power unit; the rectifier-side cooling water pipe is used to connect the main water pipe (203a) and the rectifier-side cooling interface of the power unit (202); the inverter-side cooling water pipe is used to connect the main water pipe (203a) and the inverter-side cooling interface of the power unit (202). The rectifier-side cooling water pipe includes a rectifier-side main water pipe (203c) and a rectifier-side branch water pipe (203e); the rectifier-side main water pipe (203c) is connected to the main water pipe (203a); one end of the rectifier-side branch water pipe (203e) is connected to the rectifier-side main water pipe (203c), and the other end is connected to the rectifier-side cooling interface of the power unit (202); the inverter-side cooling water pipe includes an inverter-side main water pipe (203b) and an inverter-side branch water pipe (203d); the inverter-side main water pipe (203b) is connected to the main water pipe (203a); one end of the inverter-side branch water pipe (203d) is connected to the inverter-side main water pipe (203b), and the other end is connected to the inverter-side cooling interface of the power unit (202).

2. The compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: The inverter-side branch water pipe (203d) has the same diameter as the rectifier-side branch water pipe (203e); the inverter-side main water pipe (203b) has the same diameter as the rectifier-side main water pipe (203c); the ratio of the diameter of the inverter-side branch water pipe (203d) to the inverter-side main water pipe (203b) is 16:25; the ratio of the diameter of the inverter-side main water pipe (203b) to the main water pipe (203a) is 5:

16.

3. The compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: The rectifier-side branch water pipe (203e) and the rectifier-side main water pipe (203c), as well as the inverter-side branch water pipe (203d) and the inverter-side main water pipe (203b), are connected by a live joint mechanism. Valves are used to connect the main water pipe (203c) and the main water pipe (203a) on the rectifier side, and the main water pipe (203b) and the main water pipe (203a) on the inverter side.

4. A compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: Also includes: The incoming and outgoing line unit (204) includes multiple cables, which are connected to the power unit (202); the bottom of the cabinet module (100) is provided with multiple waist holes (103), and each cable passes through the cabinet module (100) through the corresponding waist hole (103).

5. A compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: Also includes: The support unit (201) includes an insulating beam (201a), a guide rail (201b) fixed on the insulating beam (201a), and a limiting member (201c); the power unit (202) is arranged on the guide rail (201b) by rollers, and the power unit (202) is fixed to the limiting member (201c) at the front and rear to restrict the movement of the power unit in the front and rear directions.

6. A compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: Also includes: The rectifier-side support unit (206) includes a first rectifier-side support unit and a second rectifier-side support unit; The first rectifier-side support unit is fixed on the cabinet module (100), and one end of the second rectifier-side support unit is connected to the first rectifier-side support unit, while the other end is connected to the rectifier-side cascade (204).

7. A compact, high-capacity high-voltage frequency converter power cabinet according to claim 5, characterized in that: Also includes: Inverter-side support unit (208) is arranged on both sides of power unit (202). The inverter-side support unit (208) includes an L-shaped insulating profile. The vertical side of the L-shaped insulating profile is connected to the inverter-side cascade row (207), and the horizontal side is fixed to the channel steel of the insulating beam (201a) or cabinet module (100).

8. A compact, high-capacity high-voltage frequency converter power cabinet according to claim 1, characterized in that: The cabinet module has a first accommodating space A, a second accommodating space B, and a third accommodating space C distributed along the height direction, and a power unit (202) is arranged in each of the first accommodating space A, the second accommodating space B, and the third accommodating space C. The rectifier-side cascade (204) includes a first rectifier-side cascade (204-A), a second rectifier-side cascade (204-B), and a third rectifier-side cascade (204-C). The first rectifier-side cascade (204-A) corresponds to the power unit (202) in the first accommodating space A; the second rectifier-side cascade (204-B) corresponds to the power unit (202) in the second accommodating space B; the third rectifier-side cascade (204-C) corresponds to the power unit (202) in the third accommodating space C; the rectifier-side cascade (204) is connected to the power unit (202), and the rectifier-side cable (205) is connected to the rectifier-side cascade (204).

9. The high-voltage frequency converter power cabinet according to claim 8, characterized in that: Each power unit (202) is connected to multiple cables in a single phase; the four rectifier side cables (205) of a single phase of a single power unit (202) are arranged in a "field" shape, and the rectifier side cables (205) and the rectifier side cascade (204) are in a clamping form.

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