A power conversion system and power conversion device

Abstract

This application discloses a converter system and power conversion device, belonging to the field of energy storage technology. The converter system in this application includes a transformer cabinet and multiple converter cabinets. The transformer cabinet has terminals; the multiple converter cabinets are connected in parallel, each having an input terminal and an output terminal. The input terminals of the multiple converter cabinets are electrically connected to the DC side of the energy storage battery, and the output terminals of the multiple converter cabinets are electrically connected to the terminals. The multiple converter cabinets adopt a modular parallel architecture design. Depending on the specifications of the battery cells, the specifications of the converter system can be adaptively adjusted by increasing the number of converter cabinets connected in parallel, flexibly accommodating different specifications of battery cells and reducing redundancy in the converter system specifications.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a converter system and power conversion device. Background Technology

[0002] With the rapid development of the energy storage industry, the scale of energy storage systems is constantly expanding, and the capacity of battery containers has grown from the traditional hundreds of kilowatts to the megawatts and even higher. In related technologies, for battery cells with significantly different specifications, the converter system is developed in a customized manner, resulting in poor versatility. Utility Model Content

[0003] This application provides a converter system designed to address the technical problem of poor versatility in converter systems.

[0004] Technical solution: A converter system includes a transformer cabinet and multiple converter cabinets, wherein the transformer cabinet has a terminal block; the multiple converter cabinets are arranged in parallel, each converter cabinet having an input terminal and an output terminal, the input terminal of the multiple converter cabinets being electrically connected to the DC side of an energy storage battery, and the output terminal of the multiple converter cabinets being electrically connected to the terminal block.

[0005] In some embodiments, the power conversion system has multiple rows of power converter cabinets, each row of power converter cabinets including multiple power converter cabinets arranged side by side, and the multiple rows of power converter cabinets are arranged on at least one side of the transformer cabinet.

[0006] In some embodiments, a plurality of the converter cabinets are arranged in a row along a first direction, and the converter system includes multiple rows of the converter cabinets arranged along a second direction, with adjacent rows of converter cabinets spaced apart, and the first direction intersecting the second direction.

[0007] In some embodiments, the converter cabinet includes a liquid-cooled cabinet, a power cabinet, and an electronic cabinet arranged in a stacked manner. The liquid-cooled cabinet, the power cabinet, and the electronic cabinet are arranged independently of each other. The liquid-cooled cabinet is detachably connected to the power cabinet, and the power cabinet is detachably connected to the electronic cabinet.

[0008] In some embodiments, the liquid cooling cabinet is located above the power cabinet, and the electronic cabinet is located below the power cabinet;

[0009] The converter cabinet is provided with a first heat dissipation air duct, which is configured to pass through the electronic cabinet, the power cabinet and the liquid cooling cabinet.

[0010] The electronic cabinet is provided with a first air inlet, and the liquid-cooled cabinet is provided with a first air outlet on the side away from the power cabinet. Both the first air inlet and the first air outlet are connected to the first heat dissipation duct.

[0011] In some embodiments, the electronic cabinet includes a plurality of peripheral sidewalls, and at least two of the peripheral sidewalls are provided with the first air inlet;

[0012] Two adjacent electronic cabinets located in the same row are fitted together, and the two fitted side walls are provided with the first air inlet, and the two first air inlets are connected.

[0013] In some embodiments, the liquid cooling cabinet is provided with a second heat dissipation air duct, and the first heat dissipation air duct and the second heat dissipation air duct are independently arranged;

[0014] The liquid-cooled cabinet is provided with a second air inlet and a second air outlet. The second air inlet is located on one side of the liquid-cooled cabinet in the second direction and faces the adjacent row of power converter cabinets. The second air outlet is located on the side of the liquid-cooled cabinet away from the power cabinet.

[0015] In some embodiments, the electronic cabinet includes a plurality of peripheral sidewalls, and at least two of the peripheral sidewalls are provided with the first air inlet;

[0016] At least one of the first air inlets and the second air inlet is located on the same side of the converter cabinet.

[0017] In some embodiments, each of the converter cabinets has the same rated power.

[0018] This application also provides a power conversion device, including the converter system as described in the above embodiments.

[0019] Beneficial effects: The converter system in this embodiment includes a transformer cabinet and multiple converter cabinets. The transformer cabinet has a terminal block; the multiple converter cabinets are connected in parallel, and each converter cabinet has an input terminal and an output terminal. The input terminals of the multiple converter cabinets are used for electrical connection to the DC side of the energy storage battery, and the output terminals of the multiple converter cabinets are electrically connected to the terminal block. The multiple converter cabinets adopt a modular parallel architecture design. According to the specifications of the battery cells, the specifications of the converter system can be adaptively adjusted by increasing the number of converter cabinets connected in parallel, so as to flexibly accommodate battery cells of different specifications and reduce the specification redundancy of the converter system.

[0020] The power conversion device of this application includes the converter system as described in the above embodiments. Therefore, it can have all the technical features and effects of the above converter system, which will not be repeated here.

[0021] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 This is a schematic diagram of the connection relationship of a converter system according to an embodiment of this application;

[0025] Figure 2 This is a three-dimensional structural diagram of a converter system according to an embodiment of this application;

[0026] Figure 3 This is a three-dimensional structural diagram of a converter system according to another embodiment of this application;

[0027] Figure 4 This is a three-dimensional structural diagram of a converter system according to another embodiment of this application;

[0028] Figure 5 This is an exploded view of a converter cabinet in a converter system according to an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the left side of a converter system according to an embodiment of this application, showing the air paths of the first air inlet and the second air inlet;

[0030] Figure 7 This is a three-dimensional structural diagram of a converter system according to an embodiment of this application, showing the air paths of the first air inlet and the first air outlet.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Transformer cabinet; 101. Terminal block; 20. Converter cabinet; 30. Energy storage battery; 301. DC side; 201. Input terminal; 202. Output terminal; 21. Liquid cooling cabinet; 22. Power cabinet; 23. Electronic cabinet; X, first direction; Y, second direction; 24. First heat dissipation duct; 241. First air inlet; 242. First air outlet; 231. Peripheral side wall; 25. Second heat dissipation duct; 251. Second air inlet; 252. Second air outlet. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0035] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component 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 this application. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name components or embodiments by number, and do not imply any order of importance between the components or embodiments.

[0036] It should also be noted that in the accompanying drawings of this application, the arrow marked X indicates the first direction X or its opposite, and the arrow marked Y indicates the second direction Y or its opposite. The introduction of the first direction X and the second direction Y in the description of this application is to more clearly define the structure and relative positional relationships of the components in the converter system. In actual implementation, both the first direction X and the second direction Y are horizontal, and the first direction X is perpendicular to the second direction Y, to optimize the layout of the converter system. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular; for example, an angle between 80° and 100° is considered perpendicular.

[0037] As an introduction to this application, with the rapid development of the energy storage industry, the scale of energy storage systems is constantly expanding, and the capacity of battery containers has developed from the traditional hundreds of kilowatts to the megawatts and even higher. In related technologies, for battery cells with significantly different specifications, the converter system adopts customized development, resulting in poor versatility. Different manufacturers and models of battery cells have significantly different specifications, requiring customized development of the converter system for specific cells, leading to long development cycles and high costs. Converter systems come in a wide variety of specifications, including 125kW, 215kW, 450kW, 1250kW, 1725kW, 2500kW, 3450kW, and 5000kW, with low standardization, high development costs, hindering large-scale industry development, and resulting in high maintenance costs. Furthermore, for integrated converter systems, the overall internal heat dissipation is uneven, leading to low heat dissipation efficiency.

[0038] In view of this, embodiments of this application provide a converter system aimed at solving at least one of the above-mentioned technical problems.

[0039] Please see Figure 1 As shown, this application provides a converter system, including: a transformer cabinet 10 and multiple converter cabinets 20. The transformer cabinet 10 has a terminal block 101, and the multiple converter cabinets 20 are connected in parallel. Each converter cabinet 20 has an input terminal 201 and an output terminal 202. The input terminal 201 of the multiple converter cabinets 20 is used for electrical connection with the DC side 301 of the energy storage battery 30, and the output terminal 202 of the multiple converter cabinets 20 is electrically connected to the terminal block 101. It should be understood that the multiple converter cabinets 20 adopt a modular parallel architecture design. Depending on the specifications of the battery cells, the specifications of the converter system can be adaptively adjusted by increasing the number of converter cabinets 20 connected in parallel, so as to flexibly accommodate different specifications of battery cells and reduce the redundancy of the converter system specifications. For example, taking a 5MW converter system as an example, it can be composed of four 1200kW single units, or six 800kW single units combined, or twelve 400kW single units combined. Compared with the traditional 5MW single-unit solution, this reduces the customized development cost. Furthermore, with the increase in battery cell specifications, a "modular" expansion model can be adopted to expand the scope of application and reduce costs.

[0040] Furthermore, the converter cabinet 20 adopts a modular design, which has fault redundancy capability and supports redundant configuration. For example, if five converter cabinets 20 are configured, one of them will be redundant. If a single converter cabinet 20 fails, the redundant converter cabinet 20 will automatically switch to work. At the same time, maintenance of the faulty converter cabinet 20 will not affect the operation of the converter system.

[0041] It's also important to understand that the separate design of transformer cabinet 10 and converter cabinet 20 reduces localized overheating issues in the converter system and improves its heat dissipation efficiency. Simultaneously, the independent cabinet design reduces electromagnetic coupling interference. Furthermore, by unifying the interface protocol and control logic of converter cabinet 20, the standardization of energy storage systems can be accelerated.

[0042] In some embodiments, the converter system has multiple rows of converter cabinets 20, each row of converter cabinets 20 including multiple converter cabinets 20 arranged side by side, and the multiple rows of converter cabinets 20 are arranged on at least one side of the transformer cabinet 10. See also... Figure 2 and Figure 4 As shown, it's important to understand that when multiple rows of converter cabinets 20 are arranged on the same side of the transformer cabinet 10, the spaced array arrangement of the multiple rows of converter cabinets 20 provides flexibility to adapt to different installation scenarios, improves space utilization, reduces redundant space, and lowers system deployment costs. Simultaneously, single-sided arrangement enables module partitioning, facilitating maintenance and reducing cross-regional interference. Please refer to... Figure 3 As shown, with multiple rows of converter cabinets 20 arranged on different sides, compared to a centrally stacked integrated device, each converter cabinet 20 has its air inlet and outlet independently arranged, resulting in higher heat dissipation efficiency. Simultaneously, it reduces the risk of insufficient heat dissipation in the transformer cabinet 10 leading to increased inlet air temperature in the converter cabinet 20. The separate arrangement of the converter cabinets 20 can significantly improve system heat dissipation efficiency through optimized airflow paths and distributed heat dissipation load. Since the heat dissipation requirements of the transformer cabinet 10 and converter cabinet 20 differ, the separate arrangement allows for targeted cooling solutions, distributing the heat dissipation load and reducing cooling system costs. Furthermore, the transformer cabinet 10 and converter cabinet 20 can be physically isolated, improving electromagnetic compatibility performance.

[0043] Please see Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, multiple converter cabinets 20 are arranged in a row along a first direction X. The converter system includes multiple rows of converter cabinets 20 arranged along a second direction Y, with adjacent rows of converter cabinets 20 spaced apart. The first direction X intersects the second direction Y. It is important to understand that the multiple converter cabinets 20 are arranged in separate rows, distributing the heat dissipation load across multiple rows. This avoids excessive heat load in a single row leading to a surge in local ambient temperature, reducing the risk of power module failure due to high temperatures. It should be noted that the stacking directions of the liquid-cooled cabinet 21, power cabinet 22, and electronic cabinet 23 all intersect with both the first direction X and the second direction Y. The converter cabinets 20 are arranged in a matrix-style, spaced arrangement, catering to the core requirements of high-density deployment, efficient heat dissipation, and flexible operation and maintenance for megawatt-level and above energy storage systems, such as 5MW, containerized systems, and ground-mounted power stations. This achieves deep optimization of the converter system's spatial architecture, resulting in significantly increased space utilization, strong spatial compatibility, and adaptation to the size constraints of different scenarios.

[0044] The multi-row layout allows for independent row-level control. If a row of converter cabinets 20 fails, only that row's power supply needs to be cut off, while the other rows continue to operate normally. Spacing between rows weakens electromagnetic coupling and reduces radiation intensity. Airflow between rows carries away leaked electromagnetic noise from within the cabinets, reducing electromagnetic noise conduction interference between rows.

[0045] Please see Figure 5 As shown, in some embodiments, the converter cabinet 20 includes a stacked liquid-cooled cabinet 21, a power cabinet 22, and an electronic cabinet 23. The liquid-cooled cabinet 21, power cabinet 22, and electronic cabinet 23 are independently configured. The liquid-cooled cabinet 21 and power cabinet 22 are detachably connected, and the power cabinet 22 and electronic cabinet 23 are also detachably connected. It is important to understand that the converter cabinet 20 is composed of a split structure of the liquid-cooled cabinet 21, power cabinet 22, and electronic cabinet 23, with modular and detachable connections, enabling rapid fault isolation and handling. When a cabinet in one layer fails, only the corresponding connection needs to be disconnected for individual repair, while the other two layers can continue to operate normally. This modular approach facilitates future expansion. The initial deployment can be configured with one liquid-cooled cabinet 21, one power cabinet 22, and one electronic cabinet 23. The number of power cabinets 22 can be added as needed to increase the rated power of the converter cabinet 20 without replacing the liquid-cooled cabinet 21 and electronic cabinet 23. The liquid-cooled cabinet 21, power cabinet 22, and electronic cabinet 23 all use standardized interfaces, reducing maintenance costs.

[0046] Please see Figure 5 As shown, in some embodiments, the liquid cooling cabinet 21 is located above the power cabinet 22, and the electronic cabinet 23 is located below the power cabinet 22; the converter cabinet 20 is provided with a first heat dissipation duct 24, which is configured to pass through the electronic cabinet 23, the power cabinet 22 and the liquid cooling cabinet 21; the electronic cabinet 23 is provided with a first air inlet 241, and the liquid cooling cabinet 21 is provided with a first air outlet 242 on the side away from the power cabinet 22, and both the first air inlet 241 and the first air outlet 242 are connected to the first heat dissipation duct 24. It is important to understand that ambient temperature cold air is drawn in through the first air inlet 241 at the bottom of the electronic cabinet 23. It first flows through the low-heat zone of the electronic cabinet 23, where heat exchange occurs and the reactors within the cabinet are cooled. At this point, the cold air temperature rises minimally, with almost no preheating loss, and it can directly enter the high-heat zone of the power cabinet 22 in the middle, precisely removing heat from the power modules, capacitors, and copper busbars. Finally, the airflow enters the liquid-cooled cabinet 21 for exhaust, exiting through the first air outlet 242 at the top of the liquid-cooled cabinet 21. This airflow path is efficient, forming a bottom-up heat dissipation gradient and maximizing cold air utilization. The first air inlet 241 and the first air outlet 242 are positioned far apart, with the first air outlet 242 located above, reducing the risk of hot air discharged from the first air outlet 242 being repeatedly drawn into the converter cabinet 20. The core function of the liquid cooling cabinet 21 is to generate cooled liquid and send it to the liquid cooling plate in the power cabinet 22 to absorb the core heat of the power module. Meanwhile, the airflow of the first heat dissipation duct 24 is responsible for removing the heat dissipation of the weak current components in the electronic cabinet 23 and the heat in the power cabinet 22, forming a primary and secondary heat dissipation system to improve the overall heat dissipation capacity of the converter system.

[0047] It is important to understand that the electronic cabinet 23 contains low-voltage components, whose operating precision is extremely sensitive to temperature. The design employs bottom-intake airflow to cool the electronic cabinet 23 first, ensuring the stability of the low-voltage system from the source. The airflow within the first heat dissipation duct 24 forms an air curtain isolation layer between the electronic cabinet 23 and the power cabinet 22, reducing heat radiation transfer. Simultaneously, the airflow drives air circulation within the cabinet, preventing the accumulation of localized static charges and further reducing electromagnetic interference.

[0048] Please see Figure 2 , Figure 3 , Figure 4 and cooperate Figure 5 and Figure 7 As shown, in some embodiments, the electronic cabinet 23 includes multiple peripheral sidewalls 231, and at least two peripheral sidewalls 231 have first air inlets 241. Two adjacent electronic cabinets 23 located in the same row are attached to each other, and both of the attached peripheral sidewalls 231 are provided with first air inlets 241, and the two first air inlets 241 are connected. It should be understood that the multi-sidewall air intake and adjacent connection design realizes multi-path air supply and coordinated airflow within the row, increases the air intake path and air volume, reduces airflow resistance, and meets the demand for cold air in the first heat dissipation air duct 24 under high load. The adjacent air intakes are connected, forming a horizontal shared air duct within the row, with complementary airflow and no dead zones. When the air volume of a local air intake of an electronic cabinet 23 decreases due to obstruction by the inner wall of the container or dust accumulation, the shared air intake channel of the adjacent electronic cabinets 23 can supplement the cold air, avoiding insufficient air intake of a single cabinet and improving the air intake uniformity of the entire row. In a matrix layout, the electronic cabinets 23 at the edge of the row are close to the side wall of the container, which makes the internal electronic components prone to overheating due to the slightly higher ambient temperature. The shared air intake channel allows the cool air from the middle electronic cabinets 23 to flow to the edge electronic cabinets 23, compensating for the temperature difference and improving the temperature consistency of the electronic cabinets 23 in the row.

[0049] It is also important to understand that the converter cabinets 20 within the row are seamless, increasing space utilization and accommodating more power. This, combined with the matrix-style layout, enhances the overall power density. The reliability of the air intake system in the electronic cabinet 23 directly impacts the operation of the entire converter cabinet 20. It employs a multi-sided air intake and shared connectivity design, significantly improving the air intake system's fault tolerance through multi-path redundancy.

[0050] Please see Figure 5As shown, in some embodiments, the liquid-cooled cabinet 21 is provided with a second heat dissipation duct 25, and the first heat dissipation duct 24 and the second heat dissipation duct 25 are independently arranged. The liquid-cooled cabinet 21 is provided with a second air inlet 251 and a second air outlet 252. The second air inlet 251 is located on one side of the liquid-cooled cabinet 21 in the second direction Y and faces the adjacent row of converter cabinets 20. The second air outlet 252 is located on the side of the liquid-cooled cabinet 21 away from the power cabinet 22. It should be understood that the second heat dissipation duct 25 is used to independently and directionally dissipate heat from the liquid-cooled circulating heat dissipation components, thereby improving the heat exchange efficiency of the liquid-cooled cabinet 21. In the matrix multi-row layout, the interval between adjacent rows of converter cabinets 20 forms a low-temperature airflow channel. The design of the second air inlet 251 facing the adjacent row utilizes the low-temperature airflow channel to cool the airflow drawn into the liquid-cooled cabinet 21, reducing the risk of the second air inlet 251 directly drawing in high-temperature ambient airflow and improving the airflow quality. The dual-duct independent design ensures that the airflow paths do not intersect, the hot and cold zones are clearly defined, and the risk of crosstalk between hot and cold airflows is reduced. Both the second air inlet 251 and the second air outlet 252 utilize the horizontal and vertical deployment space of the converter cabinet 20 without occupying it, perfectly adapting to the high-density requirements of the matrix multi-row layout.

[0051] Please see Figure 6 As shown, in some embodiments, the electronic cabinet 23 includes multiple peripheral sidewalls 231, and at least two peripheral sidewalls 231 have first air inlets 241; at least one first air inlet 241 and a second air inlet 251 are located on the same side of the converter cabinet 20. It should be understood that by grouping at least one first air inlet 241 and the second air inlet 251 to the row side, the electronic cabinet 23 and the liquid-cooled cabinet 21 can share the row low-temperature airflow source, avoiding the problems of airflow path intersection and low-temperature air waste caused by traditional opposite-side air intake. The first heat dissipation duct 24 and the second heat dissipation duct 25 adopt single-side centralized air intake, which is conducive to unifying the airflow direction, constructing a stable single-side supplementary airflow and top exhaust airflow field, which helps to solve the negative pressure problem and reduce intake resistance. The combination design of single-side centralized air intake and multi-side wall air intake of the electronic cabinet 23 improves the system's fault resistance through single-side airflow complementarity and multi-path redundancy.

[0052] In some embodiments, each converter cabinet 20 has the same rated power. It is important to understand that using converter cabinets 20 of the same specifications results in consistent fault characteristics. Maintenance personnel do not need to differentiate power specifications; they can locate problems using a unified fault code, thus shortening troubleshooting time. The same rated power does not limit the power range, but rather allows for flexible, modular expansion through parallel connection of N units, covering all scenarios from hundreds of kilowatts to tens of megawatts, adapting to different stages of energy storage project construction.

[0053] This application also provides a power conversion device, including the converter system as described in the above embodiments. Therefore, it can possess all the technical features and effects of the aforementioned converter system, which will not be repeated here.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0056] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A converter system, characterized in that, include: A transformer cabinet (10) having terminals (101); Multiple converter cabinets (20) are arranged in parallel. Each converter cabinet (20) has an input terminal (201) and an output terminal (202). The input terminal (201) of the multiple converter cabinets (20) is used to be electrically connected to the DC side (301) of the energy storage battery (30). The output terminal (202) of the multiple converter cabinets (20) is electrically connected to the terminal (101).

2. The converter system according to claim 1, characterized in that, The converter system has multiple rows of converter cabinets (20), each row of converter cabinets (20) includes multiple converter cabinets (20) arranged side by side, and the multiple rows of converter cabinets (20) are arranged on at least one side of the transformer cabinet (10).

3. The converter system according to claim 1, characterized in that, Multiple converter cabinets (20) are arranged in a row along a first direction (X). The converter system includes multiple rows of converter cabinets (20) arranged along a second direction (Y), and adjacent rows of converter cabinets (20) are spaced apart. The first direction (X) intersects the second direction (Y).

4. The converter system according to claim 3, characterized in that, The converter cabinet (20) includes a liquid-cooled cabinet (21), a power cabinet (22), and an electronic cabinet (23) arranged in layers. The liquid-cooled cabinet (21), the power cabinet (22), and the electronic cabinet (23) are set independently of each other. The liquid-cooled cabinet (21) and the power cabinet (22) are detachably connected, and the power cabinet (22) and the electronic cabinet (23) are detachably connected.

5. The converter system according to claim 4, characterized in that, The liquid cooling cabinet (21) is located above the power cabinet (22), and the electronic cabinet (23) is located below the power cabinet (22); The converter cabinet (20) is provided with a first heat dissipation duct (24), which is configured to pass through the electronic cabinet (23), the power cabinet (22) and the liquid cooling cabinet (21); The electronic cabinet (23) is provided with a first air inlet (241), and the liquid cooling cabinet (21) is provided with a first air outlet (242) on the side away from the power cabinet (22). The first air inlet (241) and the first air outlet (242) are both connected to the first heat dissipation duct (24).

6. The converter system according to claim 5, characterized in that, The electronic cabinet (23) includes multiple peripheral sidewalls (231), and at least two of the peripheral sidewalls (231) are provided with the first air inlet (241); Two adjacent electronic cabinets (23) located in the same row are attached to each other, and the two attached peripheral sidewalls (231) are provided with the first air inlet (241), and the two first air inlets (241) are connected.

7. The converter system according to claim 5, characterized in that, The liquid cooling cabinet (21) is provided with a second heat dissipation air duct (25), and the first heat dissipation air duct (24) and the second heat dissipation air duct (25) are set independently of each other; The liquid cooler (21) is provided with a second air inlet (251) and a second air outlet (252). The second air inlet (251) is located on one side of the liquid cooler (21) in the second direction (Y) and faces the adjacent row of converter cabinets (20). The second air outlet (252) is located on the side of the liquid cooler (21) away from the power cabinet (22).

8. The converter system according to claim 7, characterized in that, The electronic cabinet (23) includes multiple peripheral sidewalls (231), and at least two of the peripheral sidewalls (231) are provided with the first air inlet (241); At least one of the first air inlets (241) and the second air inlet (251) is located on the same side of the converter cabinet (20).

9. The converter system according to claim 1, characterized in that, Each of the aforementioned converter cabinets (20) has the same rated power.

10. A power conversion device, characterized in that, Including the converter system as described in any one of claims 1 to 9.

Images