Liquid-cooled direct-current box-type substation

Abstract

The utility model provides a liquid-cooled DC box-type transformer station comprising a transformer station box body, and a high-voltage chamber, a low-voltage chamber, a transformation chamber and a liquid-cooled chamber are arranged in the transformer station box body. The high-voltage chamber and the liquid cooling chamber are distributed left and right, and the transformation chamber is located above the low-voltage chamber. The low-voltage chamber is provided with a supporting frame composed of supporting stand columns and a support, and supporting beams on the support increase the supporting area of the transformer. The liquid cooling chamber is provided with a liquid cooling host, the transformation chamber is provided with a liquid cooling heat exchanger, the low-voltage chamber is provided with a power conversion module, and the liquid cooling host is connected with the liquid cooling heat exchanger and the power conversion module to form an efficient cooling system, so that efficient heat dissipation and power adjustment are realized, and stable operation of the transformer substation is ensured. Through reasonable layout and a high-efficiency cooling system, the system is compact in structure, small in occupied area and suitable for power supply in a complex environment, stable and effective heat dissipation of the transformer substation can be ensured, and power supply reliability and stability are improved.

Description

Technical Field

[0001] The utility model relates to, but is not limited to, the field of power transmission and transformation technologies, and particularly relates to a liquid-cooled DC box-type substation. Background Art

[0002] With the rapid development of power technologies and the increasing growth of power demand, as an important part of the power distribution system, the design and functional perfection of box-type substations are particularly important. However, the traditional design of box-type substations has certain limitations in functionality and heat dissipation efficiency.

[0003] The internal space layout and functional area division of traditional box-type substations are relatively simple, and there is a lack of design for DC power consumption requirements, which cannot meet the needs of DC power consumption, thus limiting their flexibility and adaptability in the power system. In addition, the heat dissipation method of traditional box-type substations mostly uses fans for heat dissipation. However, this heat dissipation method has great limitations in heat dissipation effect. Due to the limited internal space of box-type substations and the dense equipment, poor heat dissipation will cause the equipment temperature to be too high, thereby affecting the performance and lifespan of the equipment. Especially in high-temperature environments, the effect of this heat dissipation method is more limited and cannot meet the requirements of the equipment for heat dissipation performance. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this article. This overview is not intended to limit the scope of protection of the claims.

[0005] The utility model provides a liquid-cooled DC box-type substation, which is not only compact in structure and small in floor area, but also effectively improves the heat dissipation efficiency of the substation, thereby improving the reliability and safety of the equipment.

[0006] The utility model provides a liquid-cooled DC box-type substation, comprising: a substation box body, wherein a high-voltage chamber, a low-voltage chamber, a transformer chamber and a liquid-cooling chamber are arranged in the substation box body; the high-voltage chamber and the liquid-cooling chamber are arranged left and right; the transformer chamber is located above the low-voltage chamber; the low-voltage chamber is provided with a support frame, the support frame comprises support columns and brackets, the support columns are connected with the brackets, the brackets are provided with support beams, and the support beams are used for expanding the support area of the transformer in the transformer chamber; the liquid-cooling chamber is provided with a liquid-cooling main machine, the transformer chamber is provided with a liquid-cooling heat exchanger, the low-voltage chamber is provided with a power conversion module, and the liquid-cooling main machine is respectively connected with the liquid-cooling heat exchanger and the power conversion module.

[0007] In an embodiment of the utility model, the brackets comprise cross beams and longitudinal beams, and the support beams, the cross beams and the longitudinal beams are cross-connected.

[0008] In an embodiment of the present utility model, a concave disc is provided at the bottom of the bracket, a conduit is provided at the bottom of the concave disc, and the conduit is connected to the support column and extends to the outside.

[0009] In an embodiment of the present utility model, a cable port is provided on the side wall of the high-voltage chamber, and the included angle between the cable port and the horizontal plane ranges from 20 degrees to 60 degrees.

[0010] In an embodiment of the present utility model, the liquid-cooled main unit is provided with a total liquid outlet and a total liquid return port. The total liquid return port includes a first liquid return port and a second liquid return port. The first liquid return port is connected to the first liquid outlet pipe of the liquid-cooled heat exchanger, and the second liquid return port is connected to the second liquid outlet pipe of the power conversion module.

[0011] In an embodiment of the present utility model, the total liquid outlet includes a first liquid outlet and a second liquid outlet. The first liquid outlet is connected to the first liquid return pipe of the liquid-cooled heat exchanger, and the second liquid outlet is connected to the second liquid return pipe of the power conversion module.

[0012] In an embodiment of the present utility model, a blowing element is provided on one side of the liquid-cooled heat exchanger, and the position of the blowing element corresponds to the position of the transformer.

[0013] In an embodiment of the present utility model, an incoming line cabinet and an outgoing line cabinet are provided in the low-voltage chamber. One end of the power conversion module is connected to the incoming line cabinet, and the other end is connected to the outgoing line cabinet.

[0014] In an embodiment of the present utility model, the power conversion module includes a current conversion module and a pre-charging module, and the current conversion module is connected to the pre-charging module.

[0015] In an embodiment of the present utility model, an AC circuit breaker is provided in the incoming line cabinet. The AC circuit breaker is provided with a first copper bar and a second copper bar. The first copper bar is connected to the transformer, and the second copper bar is connected to the power conversion module.

[0016] The beneficial effects of the liquid-cooled DC box-type substation provided by the present utility model at least include:

[0017] 1. Through the reasonable spatial layout of the high-voltage chamber, low-voltage chamber, transformer chamber, and liquid-cooled chamber in the substation box, the overall structure is compact and the functions are clear. This structure not only optimizes the space utilization rate inside the box but also helps to improve the operation efficiency of the substation.

[0018] 2. The connection between the liquid-cooled main unit and the liquid-cooled heat exchanger and the power conversion module significantly improves the heat dissipation performance of the substation. The liquid-cooled heat dissipation method has higher efficiency and stability compared with the traditional fan heat dissipation. Especially in a high-temperature environment, it can better ensure the normal operation of the equipment and extend the service life.

[0019] 3. The support frame in the low-voltage chamber includes support columns, brackets, and support beams on the brackets, effectively expanding the support area of the transformer in the transformer chamber and improving the stability of the equipment. This structure can reduce damage caused by equipment vibration or external impact, ensuring the stable operation of the substation. Brief Description of the Drawings

[0020] Figure 1 is the overall structure diagram of the liquid-cooled DC box-type substation provided by the present utility model;

[0021] Figure 2 is the schematic diagram of the frame structure of the liquid-cooled DC box-type substation provided by the present utility model;

[0022] Figure 3 is the side view of the frame structure provided by the present utility model;

[0023] Figure 4 is the schematic diagram of the liquid-cooling system structure provided by the present utility model;

[0024] Figure 5A is the schematic diagram of the partial structure of the substation provided by the present utility model;

[0025] Figure 5B is the enlarged schematic diagram of the partial structure of the substation provided by the present utility model;

[0026] Figure 6 is the schematic diagram of the overall structure of the low-voltage chamber provided by the present utility model;

[0027] Figure 7 is the schematic diagram of the power conversion module structure provided by the present utility model;

[0028] Figure 8 is the schematic diagram of the AC circuit breaker structure provided by the present utility model;

[0029] Figure 9 is the schematic diagram of the outgoing line cabinet structure provided by the present utility model;

[0030] Figure 10 is the circuit schematic diagram of the power conversion module provided by the present utility model;

[0031] Figure 11 is the circuit schematic diagram of the box-type substation provided by the present utility model;

[0032] Reference numerals: substation box body 100; high-voltage chamber 110; low-voltage chamber 120; transformer chamber 130; liquid-cooling chamber 140; support frame 121; power conversion module 122; transformer 131; liquid-cooling heat exchanger 132; liquid-cooling main unit 141; support column 210; bracket 220; support beam 221; cross beam 222; longitudinal beam 223; water receiving tray 310; conduit 320; cable port 330; outgoing cable 340; total liquid return port 410; total liquid outlet port 420; first liquid outlet pipe 10; first liquid return pipe 20; second liquid outlet pipe 30; second liquid return pipe 40; blowing element 510; incoming line cabinet 610; outgoing line cabinet 620; AC side 710; DC side 720; AC circuit breaker 810; first copper busbar 811; second copper busbar 812; third copper busbar 813; DC watt-hour meter 910; low-voltage DC busbar 920; DC circuit breaker 921; distribution shunt 922; DC fuse 923; cable connection interface 924; DC side interface 925; rectification module 1010; pre-charge module 1020; shunt 1030; DC fuse 1040; AC current transformer 1050; inductor 1060; AC fuse 1070; capacitor 1080; AC contactor 1090; high-voltage cabinet 1110. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] It should be noted that although the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be executed in a sequence different from that in the flowchart. Terms such as "first" and "second" in the description, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific sequence or order. It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have a technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used herein are for the purpose of describing this utility model only and are not intended to limit this utility model.

[0036] The internal space layout and functional area division of traditional box-type substations are relatively simple. They lack designs for DC power consumption requirements and cannot meet the needs of DC power consumption, which limits their flexibility and adaptability in the power system. In addition, the heat dissipation method of traditional box-type substations mostly uses fans for heat dissipation. However, this heat dissipation method has great limitations in terms of heat dissipation effect. Due to the limited internal space of the box-type substation and the dense equipment, poor heat dissipation will cause the equipment temperature to be too high, which will in turn affect the performance and lifespan of the equipment. Especially in high-temperature environments, the effect of this heat dissipation method is even more limited and cannot meet the requirements of the equipment for heat dissipation performance.

[0037] In view of this, this utility model provides a liquid-cooled DC box-type substation, which includes a substation box body. The substation box body is divided into a high-voltage chamber, a low-voltage chamber, a transformer chamber, and a liquid-cooling chamber. The high-voltage chamber and the liquid-cooling chamber are arranged left and right, and the transformer chamber is located above the low-voltage chamber. The low-voltage chamber is provided with a support frame composed of support columns and brackets, and the brackets are provided with support beams, which can be used to expand the support area of the transformer in the transformer chamber to ensure the stable installation of the transformer. This structure not only ensures the compactness of the internal structure of the substation box body, but also makes the installation process convenient and has a small floor area, making it suitable for power supply requirements in various complex environments. The liquid-cooling chamber is provided with a liquid-cooling main unit, and the transformer chamber is provided with a liquid-cooling heat exchanger. The low-voltage chamber is provided with a power conversion module. The liquid-cooling main unit is respectively connected to the liquid-cooling heat exchanger and the power conversion module to form an efficient cooling system, thereby realizing efficient heat dissipation and power regulation to ensure the stable operation of the substation.

[0038] The following further elaborates on this utility model in conjunction with the accompanying drawings.

[0039] See Figure 1 , Figure 1This is the overall structure diagram of the liquid-cooled DC box-type substation provided by the present utility model. The liquid-cooled DC box-type substation includes a substation box body 100. Inside the substation box body 100, there are a high-voltage chamber 110, a low-voltage chamber 120, a transformer chamber 130, and a liquid-cooling chamber 140. Among them, the high-voltage chamber 110 and the liquid-cooling chamber 140 are arranged symmetrically left and right, while the transformer chamber 130 is located directly above the low-voltage chamber 120. This double-layer structure design not only maximally utilizes the space inside the box but also significantly reduces the total floor area required for the equipment, thus achieving a great improvement in space utilization. Further, the low-voltage chamber 120 is provided with a support frame 121 for supporting the transformer 131 in the transformer chamber 130. The liquid-cooling chamber is provided with a liquid-cooling main unit 141, the transformer chamber 130 is equipped with a liquid-cooling heat exchanger 132, the low-voltage chamber 120 integrates a power conversion module 122, and the liquid-cooling main unit 141 is respectively connected to the liquid-cooling heat exchanger 132 and the power conversion module 122. The liquid-cooling main unit 141 can supply coolant to the liquid-cooling heat exchanger 132 and the power conversion module 122, so that the transformer 131 and the power conversion module 122 can be effectively cooled.

[0040] Specifically, as Figure 2 shown, the support frame 121 includes support columns 210 and brackets 220. The support columns 210 and the brackets 220 are connected. Among them, the brackets 220 are provided with support beams 221, and the support beams 221 can expand the support area of the transformer in the transformer chamber. In addition, the brackets 220 also include cross beams 222 and longitudinal beams 223, which are cross-connected to form a strong grid structure. This grid structure enhances the stability of the support frame 121, thereby ensuring the stability and safety of the transformer 131 during operation.

[0041] In a feasible embodiment, as Figure 3 shown, the bottom of the bracket 220 is also provided with a concave water receiving tray 310. Its main function is to prevent the condensate water that may be generated when the liquid-cooling radiator of the transformer 131 operates from accidentally dripping into the low-voltage cabinet, thereby effectively preventing the occurrence of short-circuit accidents. Further, a conduit 320 is provided at the bottom of the water receiving tray 310. The conduit 320 is connected to one side of the support column 210 and extends to the outside to ensure that the accumulated water in the water receiving tray 310 can be smoothly discharged, avoiding excessive water accumulation and further ensuring the safe and stable operation of the entire system.

[0042] In a feasible embodiment, as Figure 3As shown in the figure, a cable port 330 is provided on the side wall of the high-voltage chamber 110. The outgoing cable 340 of the high-voltage switchgear can pass through the cable port 330 to be connected to the transformer 131, thus ensuring the smooth and safe power transmission. Specifically, the cable port 330 is arranged on the side wall between the high-voltage chamber 110 and the transformer chamber 130, in a triangular shape. The angle between the surface with through holes and the horizontal plane can be controlled between 20 - 60°, so that even if the outgoing cable 340 (high-voltage cable) of the high-voltage switchgear has a large bending radius, it can pass through the cable port 330 without hindrance and smoothly pass through the side wall to be connected to the transformer 131. This design cleverly avoids the internal damage that may be caused by forced bending installation of the cable, ensuring the safety of the cable and the stable operation of the equipment.

[0043] In a feasible embodiment, it can be understood that in the box-type substation, since the transformer 131 and the power conversion module 122 are the main power conversion components and also the main heat sources, and the liquid-cooled heat exchanger 132 can effectively dissipate heat from the transformer 131, therefore, efficiently dissipating heat from the liquid-cooled heat exchanger 132 can effectively dissipate heat from the transformer 131. The liquid-cooled main unit 141, as the heat exchange device for the coolant, can take away the energy of the high-temperature liquid, so the liquid-cooled main unit 141 can efficiently dissipate heat from the liquid-cooled heat exchanger 132 and the power conversion module 122. As Figure 4 、 Figure 5A and Figure 5B shown, the liquid-cooled main unit 141 is provided with a total return liquid port 410 and a total outlet liquid port 420. Among them, the total return liquid port 410 includes a first return liquid port and a second return liquid port. The first return liquid port is connected to the first outlet pipe 10 of the liquid-cooled heat exchanger 132, and the second return liquid port is connected to the second outlet pipe 30 of the power conversion module 122. By connecting the first return liquid port of the liquid-cooled main unit 141 to the first outlet pipe 10 of the liquid-cooled heat exchanger 132, the high-temperature liquid in the liquid-cooled heat exchanger 132 can be recovered and cooled. Similarly, by connecting the second return liquid port to the second outlet pipe 30 of the power conversion module 122, the liquid-cooled main unit 141 can also recover the high-temperature liquid in the power conversion module 122 and cool it, thus ensuring that the liquid-cooled main unit 141 can continuously provide a cold source for the power conversion module 122 and the liquid-cooled heat exchanger 132, effectively guaranteeing the stable operation and heat dissipation efficiency of the equipment. In addition, the total outlet liquid port 420 includes a first outlet liquid port and a second outlet liquid port. Among them, the first outlet liquid port is connected to the first return pipe 20 of the liquid-cooled heat exchanger 132, ensuring a continuous and stable supply of cold source for the liquid-cooled heat exchanger 132. The second outlet liquid port is connected to the second return pipe 40 of the power conversion module 122, providing a continuous cooling effect for the power conversion module 122 as well. This design ensures that when the liquid-cooled main unit 141 maintains the efficient operation of the system, it can provide the necessary cooling support for both the liquid-cooled heat exchanger 132 and the power conversion module 122 simultaneously.

[0044] In a feasible embodiment, as Figure 5A and Figure 5B shown, a blowing element 510 is provided on one side of the liquid-cooled heat exchanger 132. The position of the blowing element 510 corresponds to the position of the transformer 131. The blowing element 510 can exchange heat with the liquid-cooled heat exchanger 132, thereby effectively reducing the temperature of the transformer 131. In this embodiment, the blowing element 510 can be a fan, and its strong wind can significantly improve the heat exchange efficiency and ensure that the transformer 131 maintains a stable temperature during continuous operation.

[0045] In a feasible embodiment, the working process of the liquid-cooled DC box-type substation may include: when the substation starts to work, the liquid-cooling system is also started. The liquid-cooling main unit 141, as the core component of the cooling system, begins to pump out low-temperature coolant from the total liquid outlet 420. These coolants are distributed to the equipment that needs to be cooled through the pipeline system. Specifically, a part of the coolant flows into the liquid-cooled heat exchanger 132 through the first return pipe 20. In the liquid-cooled heat exchanger 132, the coolant exchanges heat with the heat generated by the transformer 131, thereby absorbing and taking away the heat and reducing the temperature of the transformer. At this time, the blowing element 510 will also be started in a timely manner according to the temperature of the liquid-cooled heat exchanger 132, and the heat dissipation will be further accelerated by blowing to improve the cooling efficiency. After the heat exchange is completed, the high-temperature liquid in the liquid-cooled heat exchanger 132 flows back to the total return port 410 of the liquid-cooling main unit 141 through the first liquid outlet pipe 10. Inside the liquid-cooling main unit, the high-temperature liquid undergoes a cooling cycle, the temperature decreases, and it becomes low-temperature coolant again, preparing for the next cycle. At the same time, another part of the coolant flows into the power conversion module 122 through the second return pipe 40. The power conversion module 122 generates heat during the power conversion process. This part of the coolant circulates inside the power conversion module, absorbs and takes away this heat, and ensures that the power conversion module operates stably at an appropriate temperature. Subsequently, the high-temperature liquid in the power conversion module 122 flows back to the total return port 410 of the liquid-cooling main unit 141 through the second liquid outlet pipe 30. Inside the liquid-cooling main unit, this part of the high-temperature liquid also undergoes a cooling cycle, and after the temperature decreases, it becomes low-temperature coolant again, preparing for the next cooling cycle. Through this efficient cooling cycle system, the liquid-cooled DC box-type substation can ensure that the transformer 131 and the power conversion module 122 operate in a stable temperature environment, thereby improving the operation efficiency and reliability of the entire substation. At the same time, this double-layer structure design also maximizes the use of the space inside the box, reduces the total floor area required for the equipment, and realizes a great improvement in space utilization.

[0046] In a feasible embodiment, as Figure 6 and Figure 7As shown, the low-voltage chamber 120 is also provided with an incoming line cabinet 610 and an outgoing line cabinet 620. One end of the power conversion module 122 is connected to the incoming line cabinet 610, and the other end is connected to the outgoing line cabinet 620. Specifically, in Figure 7 the power conversion module 122 is provided with an AC side 710 and a DC side 720. Among them, the AC side 710 is connected to the incoming line cabinet 610, and the DC side 720 is connected to the outgoing line cabinet 620. Thus, the power conversion module 122 can efficiently convert the alternating current input by the incoming line cabinet 610, and then safely and stably transmit the converted electric energy to the outgoing line cabinet 620 to ensure the smooth transmission and efficient utilization of electric energy.

[0047] In a feasible embodiment, as Figure 8 shown, the incoming line cabinet 610 is internally equipped with an AC circuit breaker 810, and the circuit breaker is provided with two key components, namely a first copper bar 811 and a second copper bar 812. Specifically, the upper terminal of the AC circuit breaker 810 is directly connected to the low-voltage terminal of the transformer 131 through the first copper bar 811 to ensure the stable transmission of electric energy; while its lower terminal is connected to the power conversion module 122 through the second copper bar 812 to achieve the efficient conversion and application of electric energy. Such a design layout not only ensures the safety of the power system but also improves the overall working efficiency. In addition, the AC circuit breaker 810 is also provided with a third copper bar 813, and the third copper bar 813 integrates an AC quick access device, which can provide a convenient and efficient low-voltage AC power access for external devices, thereby ensuring the flexibility and reliability of the power supply.

[0048] See Figure 9 , Figure 9 which is a schematic structural diagram of the outgoing line cabinet provided by the present utility model. The outgoing line cabinet 620 is provided with a DC watt-hour meter 910 and a low-voltage DC bus bar 920. Among them, the low-voltage DC bus bar 920 integrates a DC circuit breaker 921, a power distribution shunt 922, a DC fuse 923, and a cable connection port 924. In addition, the low-voltage DC bus bar 920 also realizes an efficient and stable connection with the DC side 720 of the power conversion module 122 through its DC side interface 925 to ensure the safe transmission and stable management of electric energy.

[0049] See Figure 10 , Figure 10This is the schematic circuit diagram of the power conversion module provided by the present utility model. In the power conversion module 122, in addition to the current conversion module 1010 and the pre-charge module 1020, a shunt 1030, a DC fuse 1040, an AC current transformer 1050, an inductor 1060, an AC fuse 1070, a capacitor 1080, and an AC contactor 1090 are also integrated. Among them, the shunt 1030, the DC fuse 1040, the current conversion module 1010, the AC current transformer 1050, the inductor 1060, the AC fuse 1070, and the AC contactor 1090 are connected in series in sequence to form a complete circuit, ensuring the orderly flow and conversion of electric energy. The pre-charge module 1020 and the capacitor 1080 are connected in parallel to this circuit, and they work together to provide necessary support for the stable operation of the system. Specifically, the pre-charge module 1020 can be a DC-side capacitor pre-charge module, which provides pre-charge service for the DC-side capacitor when the power conversion module 122 starts, effectively preventing the damage to the current conversion module 1010 caused by excessive current at the moment of startup, and ensuring the safety and reliability of the equipment. The current conversion module 1010 has the function of converting AC and DC power to meet the requirements of different electrical equipment and systems for the form of electric energy. In addition, the capacitor 1080 and the inductor 1060 can be used to remove the harmonics brought by the high-speed switching of the current conversion module 1010, ensuring the purity and stability of electric energy. In this embodiment, one end of the AC current transformer 1050 is provided with an AC inlet, which is closely connected to the incoming line cabinet 610. When the power conversion module 122 receives the AC power input from the incoming line cabinet 610, the AC current transformer 1050 will respond quickly to ensure that the electric energy smoothly enters the conversion process, thus ensuring the efficient operation of the entire system. At the DC outlet of the power conversion module 122, the shunt 1030 can accurately measure the magnitude of the DC current. The shunt 1030 and the DC fuse 1040 work together to jointly build an efficient and reliable monitoring and protection system. This system can not only monitor the state of the DC current in real time, but also quickly cut off the circuit in case of abnormal conditions, thus effectively protecting the entire power conversion module 122 from damage.

[0050] See Figure 11 , Figure 11 This is the schematic circuit diagram of the box-type substation provided by the present utility model. The external high-voltage power supply first enters the high-voltage cabinet 1110, and then through the conversion of the transformer 131, the high-voltage current is converted into low-voltage current. Then, these low-voltage alternating currents are guided to the low-voltage AC incoming line cabinet 610 for centralized management. After that, the current enters the power conversion module 122, undergoing an efficient AC-to-DC conversion process. Finally, the direct current smoothly flows into the DC outgoing line cabinet 620, providing stable and reliable power support for external equipment.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid-cooled DC box-type substation, characterized in that: include: A transformer substation box, wherein a high-voltage chamber, a low-voltage chamber, a transformer chamber and a liquid-cooling chamber are arranged in the transformer substation box, wherein the high-voltage chamber and the liquid-cooling chamber are arranged on the left and right, wherein the transformer chamber is located above the low-voltage chamber, wherein the low-voltage chamber is provided with a supporting frame, wherein the supporting frame comprises supporting columns and brackets, wherein the supporting columns are connected to the brackets, wherein the brackets are provided with supporting beams, wherein the supporting beams are used to expand the supporting area of ​​the transformer in the transformer chamber; wherein the liquid-cooling chamber is provided with a liquid-cooling main unit, wherein the transformer chamber is provided with a liquid-cooling heat exchanger, wherein the low-voltage chamber is provided with a power conversion module, wherein the liquid-cooling main unit is respectively connected to the liquid-cooling heat exchanger and the power conversion module.

2. A liquid-cooled DC box-type substation according to claim 1, characterized in that: The bracket comprises a cross beam and a longitudinal beam, and the support beam, the cross beam and the longitudinal beam are connected in an alternating manner.

3. A liquid-cooled DC box-type substation according to claim 1, characterized in that: A concave disc is provided at the bottom of the bracket, a concave disc is provided at the bottom of the concave disc, and the conduit is connected to the supporting column and extends to the outside.

4. A liquid-cooled DC box-type substation according to claim 1, characterized in that: The side wall of the high-voltage chamber is provided with a cable opening, and the angle between the cable opening and the horizontal plane ranges from 20 degrees to 60 degrees.

5. The liquid-cooled DC box-type substation according to claim 1, characterized in that: The liquid cooling host is provided with a total liquid outlet and a total liquid return port, the total liquid return port includes a first liquid return port and a second liquid return port, the first liquid return port is connected to the first liquid outlet pipe of the liquid cooling heat exchanger, and the second liquid return port is connected to the second liquid outlet pipe of the power conversion module.

6. A liquid-cooled DC box-type substation according to claim 5, characterized in that: The total liquid outlet includes a first liquid outlet and a second liquid outlet, the first liquid outlet is connected to the first liquid return pipe of the liquid-cooled heat exchanger, and the second liquid outlet is connected to the second liquid return pipe of the power conversion module.

7. The liquid-cooled DC box-type substation according to claim 1, characterized in that: A blowing element is provided on one side of the liquid-cooled heat exchanger, and the position of the blowing element corresponds to the position of the transformer.

8. The liquid-cooled DC box-type substation according to claim 1, characterized in that: The low-voltage room is provided with an incoming line cabinet and an outgoing line cabinet. One end of the power conversion module is connected to the incoming line cabinet, and the other end is connected to the outgoing line cabinet.

9. A liquid-cooled DC box-type substation according to claim 8, characterized in that: The power conversion module includes a current conversion module and a pre-charging module, and the current conversion module is connected to the pre-charging module.

10. A liquid-cooled DC box-type substation according to claim 8, characterized in that: The incoming line cabinet is provided with an AC circuit breaker, and the AC circuit breaker is provided with a first copper bar and a second copper bar, the first copper bar is connected to the transformer, and the second copper bar is connected to the power conversion module.

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