Electrical cabin and energy storage system

Abstract

The application provides an electrical cabin and energy storage system, and relates to the technical field of energy storage systems.The electrical cabin comprises a cabin body, an oil-immersed transformer, a circuit breaker cabinet, a low-voltage power distribution cabinet and an air conditioning system integrated in the cabin body;the high-voltage side of the oil-immersed transformer is connected to a power grid, the low-voltage side is electrically connected to the circuit breaker cabinet, the circuit breaker cabinet is connected to a battery box;the low-voltage power distribution cabinet is electrically connected to the air conditioning system;the circuit breaker cabinet and the low-voltage power distribution cabinet are both arranged between the oil-immersed transformer and the air conditioning system;air flows through the air outlet of the air conditioning system, the low-voltage power distribution cabinet, the circuit breaker cabinet and the air return port of the air conditioning system in sequence to form an air circulation path.In the technical scheme of the application, the air conditioning system is used as the only interface for heat exchange between the cabin body and the external environment, multiple heat exchange openings directly connected to the external environment are not needed on the cabin body, the cabin body is effectively isolated from the corrosive air outside, and the reliability of the equipment in long-term operation in a harsh environment is improved, and the safety hazard is reduced.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and more specifically, to an electrical compartment and an energy storage system. Background Technology

[0002] In string energy storage systems, the booster chamber is a key device connecting the battery side and the grid side.

[0003] In related technologies, to meet heat dissipation requirements, pressurization chambers typically employ distributed fans for ventilation and heat dissipation, necessitating the creation of multiple heat exchange openings that directly connect the chamber to the external environment. In harsh environments such as those with high salt spray and high humidity (e.g., at the seaside), corrosive external air can easily enter the chamber through these heat exchange openings, causing corrosion to electronic components in equipment such as low-voltage switchgear and ACB (Air Circuit Breaker) cabinets, posing a safety hazard. Summary of the Invention

[0004] One objective of this invention is to provide an electrical compartment that uses only the air conditioning system as the sole interface for heat exchange between the compartment and the outside environment. This eliminates the need for multiple heat exchange openings on the compartment that directly connect to the external environment, effectively preventing corrosive air from entering the compartment. This improves the reliability of the equipment during long-term operation in harsh environments and reduces safety hazards.

[0005] Another object of the present invention is to provide an energy storage system.

[0006] To achieve the above objectives, the first aspect of the present invention provides an electrical compartment, including a compartment body and an oil-immersed transformer, a circuit breaker cabinet, a low-voltage distribution cabinet, and an air conditioning system integrated into the compartment body; the high-voltage side of the oil-immersed transformer is used to connect to the power grid, and the low-voltage side of the oil-immersed transformer is electrically connected to the circuit breaker cabinet, which is used to connect to a battery box; the low-voltage distribution cabinet is electrically connected to the air conditioning system to supply power to the air conditioning system; both the circuit breaker cabinet and the low-voltage distribution cabinet are located between the oil-immersed transformer and the air conditioning system, and the air conditioning system is used to provide heat exchange for the circuit breaker cabinet and the low-voltage distribution cabinet, with airflow passing sequentially through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet, and the return air outlet of the air conditioning system, forming an air circulation path.

[0007] This invention aims to provide an electrical compartment that, by incorporating an air conditioning system, can exchange heat with most of the electronic components and conductive connecting parts within the compartment. Compared to using distributed fans for ventilation and heat dissipation, it eliminates the need for multiple heat exchange openings on the compartment that directly connect to the external environment. Instead, the air conditioning system serves as the sole interface for heat exchange between the compartment and the outside world. This significantly reduces the space required, improves system integration, and effectively prevents corrosive air from entering the compartment. This enhances the reliability of the equipment during long-term operation in harsh environments and reduces safety hazards.

[0008] The airflow passes sequentially through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet, and the return air outlet of the air conditioning system, forming an air circulation path (the circulation path of the internal air in the cabin). By optimizing the deployment of the air circulation path, it is ensured that the temperature-controlled air delivered by the air conditioning system preferentially passes through the low-voltage distribution cabinet (containing precision components such as detection modules and communication modules), which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet and other areas. This achieves precise thermal management and air circulation, which helps to improve heat exchange efficiency and enhance heat dissipation and temperature control effects.

[0009] In addition, the circuit breaker cabinet and low-voltage distribution cabinet are located between the oil-immersed transformer and the air conditioning system. By optimizing the spatial layout of various electrical equipment within the cabin, the overall space occupied can be significantly reduced, the system integration and space utilization can be improved, and the heat exchange path between the air conditioning system and the electrical equipment within the cabin can be shortened, which is conducive to further improving heat exchange efficiency.

[0010] In some technical solutions, optionally, a reserved air duct is provided between the air conditioning system and the low-voltage distribution cabinet. The reserved air duct is connected to the air outlet and is used for the passage of air supplied by the air conditioning system.

[0011] In this technical solution, by setting up a reserved air duct between the air conditioning system and the low-voltage distribution cabinet, the air delivered by the air conditioning system can be guided to ensure that the temperature-controlled air delivered by the air conditioning system passes first through the low-voltage distribution cabinet, which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet and other areas. This achieves precise thermal management and air circulation, which is conducive to improving heat exchange efficiency and enhancing heat dissipation and temperature control effects.

[0012] In some technical solutions, the electrical compartment may optionally include a conductive connection component, one end of which is connected to the low-voltage side of the oil-immersed transformer, and the other end of which is connected to the circuit breaker cabinet; wherein the airflow passes through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet, the conductive connection component, and the return air outlet of the air conditioning system in sequence, forming an air circulation path.

[0013] In this technical solution, by setting a conductive connection component, a stable electrical connection between the oil-immersed transformer and the circuit breaker cabinet can be achieved, and the conductive connection component can exchange heat with the air supplied by the air conditioning system.

[0014] The temperature-controlled air delivered by the air conditioning system first passes through the low-voltage distribution cabinet (containing precision components such as detection modules and communication modules), which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet, conductive connection components and other areas, achieving precise thermal management and air circulation, which is conducive to improving heat exchange efficiency.

[0015] In some technical solutions, optionally, the oil-immersed transformer includes: an oil-immersed load switch, the side of which is used to connect to the power grid being the high-voltage side of the oil-immersed transformer; a fuse assembly connected to the oil-immersed load switch; and a transformer body connected to the fuse assembly, the side of which is used to connect to the circuit breaker cabinet being the low-voltage side of the oil-immersed transformer.

[0016] In this technical solution, the oil-immersed load switch is integrated inside the oil-immersed transformer, enabling normal opening and closing operations of the high-voltage side circuit and controlling its continuity. A fuse assembly is connected in series between the oil-immersed load switch and the transformer body, capable of quickly melting and disconnecting the circuit in the event of short circuits, overloads, or other faults, providing short-circuit and overload protection for the transformer body and downstream power distribution equipment. The transformer body primarily performs voltage transformation, meeting the requirements for voltage boosting and grid connection of the energy storage system.

[0017] In some technical solutions, the fuse assembly optionally includes at least two fuses connected in series, namely a first fuse and a second fuse, wherein the first fuse is connected to an oil-immersed load switch and the second fuse is connected to the transformer body.

[0018] In this technical solution, by using two fuses connected in series, a two-level hierarchical protection architecture can be formed, which can match the fuse requirements of different fault conditions of the circuit. It can quickly limit and disconnect instantaneous short-circuit faults, and also provide time-delay protection for continuous overload faults. The protection level is more complete and the fault disconnection reliability is higher.

[0019] In some technical solutions, the outer wall of the hull may optionally be provided with a protective coating.

[0020] In this technical solution, by setting a protective coating, the weather resistance of the electrical compartment can be improved, thereby increasing the reliability of the equipment during long-term operation in harsh environments and reducing safety hazards.

[0021] In some technical solutions, optionally, the circuit breaker cabinet includes: a first line, one end of which is connected to the low-voltage side of the oil-immersed transformer, and the other end of which is connected to the battery box; and a frame circuit breaker, which is installed on the first line and is used to control the on / off state of the first line.

[0022] In this technical solution, by installing a frame circuit breaker on the first line of the circuit breaker cabinet, controllable switching and centralized protection of the low-voltage side circuit can be achieved. The frame circuit breaker can quickly respond to and reliably disconnect faults such as overload, short circuit, and undervoltage in the low-voltage side circuit, and can promptly cut off the faulty circuit and isolate the fault range, which is conducive to improving the safety, stability and controllability of the entire electrical compartment power distribution circuit operation.

[0023] In some technical solutions, optionally, the low-voltage distribution cabinet includes: a second line for connecting to an external power source, the second line also for connecting to electrical loads located within the cabin, wherein the electrical loads include an air conditioning system; a detection module connected to the second line, the detection module being used to acquire power parameters and / or temperature and humidity data of the electrical cabin; and a communication module connected to the second line, the communication module being used to communicate with the energy management system.

[0024] In this technical solution, a second power line is set up to centrally distribute power to electrical loads such as the air conditioning system within the cabin. The wiring is neat and the power supply architecture is clear, facilitating the integrated layout and overall management of electrical equipment within the cabin. The detection module can collect real-time power parameters and / or temperature and humidity data from the electrical cabin, enabling timely monitoring of equipment operating conditions and environmental status. Combined with a communication module that interconnects with the energy management system, remote uploading of operational data and command interaction are achieved, facilitating centralized monitoring, intelligent scheduling, and operation and maintenance management of the electrical cabin.

[0025] In some technical solutions, the oil-immersed transformer, circuit breaker cabinet, low-voltage distribution cabinet and air conditioning system are optionally arranged along a first direction; or the oil-immersed transformer, circuit breaker cabinet and air conditioning system are arranged along a first direction, and the circuit breaker cabinet and low-voltage distribution cabinet are arranged along a second direction, which is inconsistent with the first direction.

[0026] In this technical solution, by optimizing the spatial layout of various electrical devices within the cabin, the overall space occupied can be significantly reduced, the system integration and space utilization can be improved, and the heat exchange path between the air conditioning system and the electrical devices within the cabin can be shortened, which is conducive to further improving heat exchange efficiency.

[0027] A second aspect of the present invention provides an energy storage system, comprising: a battery box; an electrical compartment as described in any of the above technical solutions, wherein the circuit breaker cabinet of the electrical compartment is connected to the battery box, and the oil-immersed transformer of the electrical compartment is used to connect to the power grid.

[0028] Energy storage systems have the beneficial effects of any of the above-mentioned technical solutions, which will not be elaborated further here.

[0029] Additional aspects and advantages of the technical solutions of the present invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 A front view of the electrical compartment according to an embodiment of the present invention is shown;

[0031] Figure 2 A top view of the electrical compartment according to an embodiment of the present invention is shown;

[0032] Figure 3A perspective view of the electrical compartment according to an embodiment of the present invention is shown;

[0033] Figure 4 A perspective view of the electrical compartment according to another embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of an energy storage system according to another embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of an oil-immersed transformer according to an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of a circuit breaker cabinet according to an embodiment of the present invention is shown;

[0037] Figure 8 A schematic diagram of a battery box according to an embodiment of the present invention is shown;

[0038] Figure 9 A schematic diagram of an air circulation path according to an embodiment of the present invention is shown;

[0039] Figure 10 A structural block diagram of a low-voltage distribution cabinet according to an embodiment of the present invention is shown;

[0040] Figure 11 A structural block diagram of an electrical load according to an embodiment of the present invention is shown.

[0041] The attached figures are labeled as follows:

[0042] 100: Electrical compartment; 110: Body; 111: Protective coating; 120: Oil-immersed transformer; 121: High-voltage side; 122: Low-voltage side; 123: Oil-immersed load switch; 124: Fuse assembly; 1241: First fuse; 1242: Second fuse; 125: Transformer body; 130: Conductive connection component; 140: Circuit breaker cabinet; 141: First line; 142: Frame circuit breaker; 150: Low-voltage distribution cabinet; 1 51: Second line; 152: Detection module; 153: Communication module; 154: Power supply module; 160: Reserved air duct; 170: Air conditioning system; 171: Air outlet; 172: Return air outlet; 180: Electrical load; a: First direction; b: Second direction; 200: Energy storage system; 210: Battery box; 211: Battery module; 212: Energy storage converter; 220: External power supply; 230: Energy management system; 300: Power grid. Detailed Implementation

[0043] To better understand the above-described objectives, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0045] In string energy storage systems, the booster chamber is a key device connecting the battery side and the grid side.

[0046] In related technologies, to meet heat dissipation requirements, pressurization chambers typically employ distributed fans for ventilation and heat dissipation, necessitating the creation of multiple heat exchange openings that directly connect the chamber to the external environment. In harsh environments such as those with high salt spray and high humidity (e.g., at the seaside), corrosive external air can easily enter the chamber through these heat exchange openings, causing corrosion to electronic components in equipment such as low-voltage switchgear and ACB (Air Circuit Breaker) cabinets, posing a safety hazard.

[0047] This invention aims to provide an electrical compartment and energy storage system. By incorporating an air conditioning system, heat exchange can be conducted with most of the electronic components and conductive connecting parts within the compartment. Compared to using distributed fans for ventilation and heat dissipation, it eliminates the need for multiple heat exchange openings on the compartment that directly connect to the external environment. Instead, the air conditioning system serves as the sole interface for heat exchange between the compartment and the outside world. This significantly reduces the space required, improves system integration, and effectively prevents corrosive air from entering the compartment. This enhances the reliability of the equipment during long-term operation in harsh environments and reduces safety hazards.

[0048] The airflow passes sequentially through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet, and the return air outlet of the air conditioning system, forming an air circulation path (the circulation path of the internal air in the cabin). By optimizing the deployment of the air circulation path, it is ensured that the temperature-controlled air delivered by the air conditioning system preferentially passes through the low-voltage distribution cabinet (containing precision components such as detection modules and communication modules), which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet and other areas. This achieves precise thermal management and air circulation, which helps to improve heat exchange efficiency and enhance heat dissipation and temperature control effects.

[0049] In addition, the circuit breaker cabinet and low-voltage distribution cabinet are located between the oil-immersed transformer and the air conditioning system. By optimizing the spatial layout of various electrical equipment within the cabin, the overall space occupied can be significantly reduced, the system integration and space utilization can be improved, and the heat exchange path between the air conditioning system and the electrical equipment within the cabin can be shortened, which is conducive to further improving heat exchange efficiency.

[0050] In related technologies, the pressurized chamber uses distributed fans for ventilation and heat dissipation. However, distributed fans have limited temperature control capabilities, making it difficult to provide a stable and reliable operating environment for temperature-sensitive electronic components inside the chamber at extreme ambient temperatures such as -35°C or 55°C.

[0051] It should be noted that temperature-sensitive electronic components include UPS (Uninterruptible Power Supply) and batteries.

[0052] In the technical solution of this invention, an air conditioning system is used to centrally regulate heat exchange within the cabin. Compared with the method of using decentralized fans for ventilation and heat dissipation, the temperature control and regulation capability is stronger, and it can adapt to a wide temperature range of extreme working conditions from -35℃ to 55℃. It can provide a stable and reliable working environment for temperature-sensitive electronic components within the cabin, and effectively improve the operational stability and environmental adaptability of electrical equipment under extreme high and low temperature conditions.

[0053] In addition, using only the air conditioning system as the sole interface for heat exchange between the cabin and the outside world is more integrated and easier to maintain than using distributed fans for ventilation and heat dissipation.

[0054] The following reference Figures 1 to 11 The invention describes an electrical compartment and energy storage system provided according to some embodiments of the invention.

[0055] In one embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the electrical compartment 100 includes a compartment 110 and an oil-immersed transformer 120, a circuit breaker cabinet 140, a low-voltage distribution cabinet 150, and an air conditioning system 170 integrated into the compartment 110.

[0056] like Figure 5 As shown, the high-voltage side 121 of the oil-immersed transformer 120 is used to connect to the power grid 300, and the low-voltage side 122 of the oil-immersed transformer 120 is electrically connected to the circuit breaker cabinet 140, which is used to connect to the battery box 210.

[0057] The low-voltage distribution cabinet 150 is electrically connected to the air conditioning system 170 to supply power to the air conditioning system 170.

[0058] Both the circuit breaker cabinet 140 and the low-voltage distribution cabinet 150 are located between the oil-immersed transformer 120 and the air conditioning system 170. The air conditioning system 170 provides heat exchange for the circuit breaker cabinet 140 and the low-voltage distribution cabinet 150. The airflow passes sequentially through the air outlet 171 of the air conditioning system 170, the low-voltage distribution cabinet 150, the circuit breaker cabinet 140, and the return air outlet 172 of the air conditioning system 170, forming an air circulation path (e.g., Figure 9 (As shown).

[0059] It should be noted that the electrical compartment 100 here is a booster compartment, a key device connecting the battery side (specifically, battery box 210) and the grid side (specifically, grid 300). Electrical energy from the battery box 210 is boosted in the booster compartment before being fed into the grid 300. Optionally, the circuit breaker cabinet 140 is used to connect the AC output terminal of the energy storage converter 212 (PCS, PowerConversion System) inside the battery box 210. Figure 9 In the image, the arrow indicates the direction of airflow.

[0060] Optionally, the hull 110 has a container-type structure with a length of 20 feet (standard container size). Optionally, the oil-immersed transformer 120 is located inside the hull 110. The circuit breaker cabinet 140 is located inside the hull 110. The low-voltage distribution cabinet 150 is located inside the hull 110. At least a portion of the air conditioning system 170 is located inside the hull 110. It should be noted that the air conditioning system 170 may be entirely located inside the hull 110; or, a portion of the air conditioning system 170 may be located inside the hull 110, and another portion may be located outside the hull 110.

[0061] The oil-immersed transformer 120 is the core transformer equipment within the electrical compartment 100. It is filled with transformer oil and relies on the oil and heat sinks on its outer casing for self-cooling, eliminating the need for the air conditioning system 170 within the compartment 110 to participate in heat exchange. The oil-immersed transformer 120 is primarily used to raise the voltage on the low-voltage side 122 to the appropriate voltage of the power grid 300. It has strong overload and short-circuit withstand capabilities, making it suitable for harsh outdoor and coastal operating conditions.

[0062] Circuit breaker cabinet 140 is a cabinet equipped with circuit breakers. One end of circuit breaker cabinet 140 is connected to the low-voltage side 122 of oil-immersed transformer 120 via conductive connection member 130, and the other end is used to connect to the AC output terminal of energy storage converter 212 in battery box 210.

[0063] like Figure 11 As shown, the low-voltage distribution cabinet 150 is used to supply power to all electrical loads 180 (including the air conditioning system 170) within the cabin 110. The low-voltage distribution cabinet 150 is equipped with various precision components that are sensitive to temperature and humidity, such as the detection module 152 and the communication module 153.

[0064] The air conditioning system 170 is used to provide heat exchange to all electrical equipment and conductive connection components 130 within the cabin 110, except for the oil-immersed transformer 120. The air conditioning system 170 is the only heat exchange interface between the cabin 110 and the external environment.

[0065] The present invention aims to provide an electrical compartment 100, which, by setting up an air conditioning system 170, can exchange heat with most of the electronic components and conductive connecting components 130 inside the compartment 110. Compared with the method of using distributed fans for ventilation and heat dissipation, it is not necessary to open multiple heat exchange openings on the compartment 110 that are directly connected to the external environment. The air conditioning system 170 is used as the only interface for heat exchange between the compartment 110 and the outside world. This can significantly reduce the space occupied, improve the system integration, and effectively prevent corrosive air from entering the compartment 110. This is conducive to improving the reliability of the equipment during long-term operation in harsh environments and reducing safety hazards.

[0066] The airflow passes sequentially through the air outlet 171 of the air conditioning system 170, the low-voltage distribution cabinet 150, the circuit breaker cabinet 140, and the return air outlet 172 of the air conditioning system 170, forming an air circulation path (the circulation path of the internal air in the cabin 110). By optimizing the deployment of the air circulation path, it is ensured that the temperature-controlled air delivered by the air conditioning system 170 preferentially passes through the low-voltage distribution cabinet 150 (containing precision components such as the detection module 152 and the communication module 153), which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet 140 and other areas. This achieves precise thermal management and air circulation, which is beneficial for improving heat exchange efficiency and enhancing heat dissipation and temperature control effects.

[0067] In addition, the circuit breaker cabinet 140 and the low-voltage distribution cabinet 150 are both located between the oil-immersed transformer 120 and the air conditioning system 170. By optimizing the spatial layout of various electrical equipment within the cabin 110, the overall space occupied can be significantly reduced, the system integration and space utilization can be improved, and the heat exchange path between the air conditioning system 170 and the electrical equipment within the cabin 110 can be shortened, which is conducive to further improving heat exchange efficiency.

[0068] It should be noted that the electrical compartment 100 of this invention is an integrated booster device with high weather resistance and wide temperature adaptability. High weather resistance refers to strong resistance to high salt spray, high humidity, high and low temperatures, as well as corrosion and aging. Wide temperature adaptability refers to strong temperature control and regulation capabilities, adaptable to extreme operating environments across a wide temperature range from -35℃ to 55℃.

[0069] In the technical solution of the present invention, the air conditioning system 170 is used as the only interface for heat exchange between the cabin 110 and the outside world. Furthermore, the directional air circulation path (air circulation path) is constructed and optimized. This not only enables precise control of temperature and humidity inside the cabin 110, allowing it to adapt to extreme environments ranging from -35°C to 55°C and high salt spray corrosion environments at the seaside, but also simplifies the thermal management architecture through structural optimization, which is beneficial to improving system integration and long-term operational reliability.

[0070] In some embodiments, optionally, only one air conditioning system 170 is installed in the electrical compartment 100, serving as the heat exchange source for all components (except the oil-immersed transformer 120) within the compartment 110, and also as the sole heat exchange interface between the compartment 110 and the external environment. The compartment 110 adopts a closed box structure (such as a closed container) to effectively prevent corrosive external air from entering the compartment 110, achieving "unified external protection and centralized internal control".

[0071] In addition, the active temperature control function of the air conditioning system 170 enables the electrical components in the cabin 110 to maintain excellent operating conditions within a wide temperature range of -35°C to 55°C.

[0072] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, a reserved air duct 160 is provided between the air conditioning system 170 and the low-voltage distribution cabinet 150. The reserved air duct 160 is connected to the air outlet 171 and is used for the air supplied by the air conditioning system 170 to pass through.

[0073] The airflow passes through the air outlet 171 of the air conditioning system 170, the reserved air duct 160 (air duct of preset length), the low-voltage distribution cabinet 150, the circuit breaker cabinet 140 and the return air outlet 172 of the air conditioning system 170, forming an air circulation path (the circulation path of the internal air in the cabin 110).

[0074] By setting up a reserved air duct 160 between the air conditioning system 170 and the low-voltage distribution cabinet 150, the air (airflow) delivered by the air conditioning system 170 can be guided to ensure that the temperature-controlled air delivered by the air conditioning system 170 passes first through the low-voltage distribution cabinet 150 (which contains precision components such as the detection module 152 and the communication module 153) which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet 140 and other areas. This achieves precise thermal management and air circulation, which is conducive to improving heat exchange efficiency and enhancing heat dissipation and temperature control effects.

[0075] By setting up a reserved air duct of 160, the environmental stability of temperature-sensitive components is prioritized, reducing the risk of failure caused by temperature and humidity fluctuations and improving the overall operational reliability of the station.

[0076] It should be noted that the temperature-sensitive components include the detection module 152 (measuring unit), the communication module 153, and the UPS (Uninterruptible Power Supply).

[0077] In addition, the reserved air duct 160 can provide sufficient installation and maintenance space between the air conditioning system 170 and the low-voltage distribution cabinet 150, which facilitates later maintenance operations.

[0078] In some embodiments, the air conditioning system 170 optionally has heating, dehumidification and cooling functions. Combined with the high weather resistance coating (protective coating 111) and sealing design of the cabin 110, the entire pressurized cabin can operate stably in extreme ambient temperatures ranging from -35°C to 55°C, which helps to ensure the reliability of sensitive components such as internal UPS and batteries.

[0079] Replacing multiple dispersed fans with a centralized air conditioning system 170 eliminates the need for multiple heat exchange openings on the hull 110 that directly connect to the external environment, which helps to improve the protection level of the electrical compartment 100.

[0080] In some embodiments, the air conditioning system 170 is optionally an integrated industrial air conditioner, which has independent internal circulation duct and external circulation duct. The internal circulation duct is connected to the cabin space, and the external circulation duct is connected to the external environment. The internal circulation duct and the external circulation duct exchange heat through a heat exchanger, and the internal and external air do not come into contact with each other.

[0081] It should be noted that, in this invention, "air outlet 171" is the outlet of the internal circulation air duct; and "air return outlet 172" is the inlet of the internal circulation air duct.

[0082] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the electrical compartment 100 also includes a conductive connection component 130. One end of the conductive connection component 130 is connected to the low-voltage side 122 of the oil-immersed transformer 120, and the other end of the conductive connection component 130 is connected to the circuit breaker cabinet 140. The airflow passes sequentially through the air outlet 171 of the air conditioning system 170, the low-voltage distribution cabinet 150, the circuit breaker cabinet 140, the conductive connection component 130, and the return air outlet 172 of the air conditioning system 170, forming an air circulation path.

[0083] By providing the conductive connection component 130, a stable electrical connection between the oil-immersed transformer 120 and the circuit breaker cabinet 140 can be achieved, and the conductive connection component 130 can exchange heat with the air supplied by the air conditioning system 170.

[0084] The temperature-controlled air delivered by the air conditioning system 170 first passes through the low-voltage distribution cabinet 150 (containing precision components such as detection module 152 and communication module 153), which is most sensitive to temperature and humidity, and then circulates to the circuit breaker cabinet 140, conductive connection component 130 and other areas, to achieve precise thermal management and air circulation, which is conducive to improving heat exchange efficiency.

[0085] In some embodiments, the conductive connection member 130 is optionally a copper busbar. One end of the copper busbar is connected to the low-voltage side 122 of the oil-immersed transformer 120, and the other end is connected to the circuit breaker cabinet 140. The copper busbar has the advantages of strong conductivity and the ability to directly exchange heat with the air supplied by the air conditioning system 170.

[0086] In some embodiments, optionally, such as Figure 6 As shown, the oil-immersed transformer 120 includes an oil-immersed load switch 123, a fuse assembly 124, and a transformer body 125. The side of the oil-immersed load switch 123 used for connecting to the power grid 300 is the high-voltage side 121 of the oil-immersed transformer 120. The fuse assembly 124 is connected to the oil-immersed load switch 123. The transformer body 125 is connected to the fuse assembly 124, and the side of the transformer body 125 used for connecting to the circuit breaker cabinet 140 is the low-voltage side 122 of the oil-immersed transformer 120.

[0087] The oil-immersed load switch 123 is integrated inside the oil-immersed transformer 120, which can realize the normal opening and closing operation of the high-voltage side circuit and control the on and off of the high-voltage side circuit.

[0088] The fuse assembly 124 is arranged in series between the oil-immersed load switch 123 and the transformer body 125. It can quickly melt and cut off the circuit when a short circuit or overload occurs in the circuit, and play a role in short circuit protection and overload protection for the transformer body 125 and downstream power distribution equipment.

[0089] The transformer body 125 mainly undertakes the voltage transformation function to meet the grid connection requirements of the energy storage system 200.

[0090] The oil-immersed transformer 120 has a compact overall structure and high integration, which facilitates overall assembly and subsequent maintenance within the cabin 110.

[0091] Optionally, the oil-immersed transformer 120 also includes a high-voltage bushing for the connecting cables, used to effectively protect the connecting cables.

[0092] The oil-immersed transformer 120 adopts the YNd11 connection group. "YNd11 connection" is an 11 o'clock phase connection method with "high-voltage star and low-voltage delta". Here, "Y" indicates that the high-voltage side winding is star connected; "N" indicates that the neutral point is led out from the high-voltage side 121 star connection; "d" indicates that the low-voltage side winding is delta connected; and "11" indicates that the phase difference between the voltage on the high-voltage side 121 and the voltage on the low-voltage side 122 is 30°, corresponding to the 11 o'clock position on a clock.

[0093] In some embodiments, the oil-immersed transformer 120 may optionally include a housing, within which the oil-immersed load switch 123, fuse assembly 124, and transformer body 125 are all housed. The oil-immersed load switch 123 is immersed in transformer oil. The oil-immersed transformer 120 achieves self-cooling by means of the oil and heat sinks on the housing, without relying on the air conditioning system 170 within the compartment 110 for heat exchange.

[0094] In some embodiments, optionally, such as Figure 6 As shown, the fuse assembly 124 includes at least two fuses 1241 and 1242 connected in series. The first fuse 1241 is connected to the oil-immersed load switch 123, and the second fuse 1242 is connected to the transformer body 125.

[0095] By using two fuses connected in series, a two-level hierarchical protection architecture can be formed, which can match the fuse requirements of different fault conditions of the circuit. It can quickly limit and disconnect transient short-circuit faults, and also provide time-delay protection for continuous overload faults. The protection level is more complete and the fault disconnection reliability is higher.

[0096] Optionally, the first fuse 1241 is an overload current-limiting fuse; the second fuse 1242 is a backup protection fuse.

[0097] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the outer wall of the cabin 110 is provided with a protective coating 111.

[0098] By setting a protective coating 111, the weather resistance of the electrical compartment 100 can be improved, thereby increasing the reliability of the equipment during long-term operation in harsh environments and reducing safety hazards.

[0099] Optionally, the protective coating 111 is a highly weather-resistant and corrosion-resistant coating.

[0100] In some embodiments, optionally, such as Figure 7As shown, the circuit breaker cabinet 140 includes a first circuit 141 and a frame circuit breaker 142. One end of the first circuit 141 is connected to the low-voltage side 122 of the oil-immersed transformer 120, and the other end of the first circuit 141 is connected to the battery box 210. The frame circuit breaker 142 is mounted on the first circuit 141 and is used to control the on / off state of the first circuit 141.

[0101] It should be noted that the first line 141 is a low-voltage side circuit. One end of the low-voltage side circuit is connected to the low-voltage side 122 of the oil-immersed transformer 120, and the other end is used to connect to the AC output terminal of the energy storage converter 212 inside the battery box 210.

[0102] The frame circuit breaker 142 is mounted on the first line 141 and can controllably realize the closing and opening of the first line 141, while also monitoring the operating status of the main circuit.

[0103] By installing a frame circuit breaker 142 on the first line 141 of the circuit breaker cabinet 140, controllable switching and centralized protection of the low-voltage side circuit can be achieved. The frame circuit breaker 142 can quickly respond to and reliably disconnect faults such as overload, short circuit, and undervoltage in the low-voltage side circuit, and can promptly cut off the faulty circuit and isolate the fault range, which is conducive to improving the safety, stability and controllability of the entire electrical compartment 100 power distribution circuit operation.

[0104] In some embodiments, optionally, such as Figure 8 As shown, the battery box 210 includes a battery module 211 and an energy storage converter 212. The battery module 211 is connected to the circuit breaker cabinet 140 through the energy storage converter 212.

[0105] The energy storage converter 212 is used to convert the DC power output from the battery module 211 into AC power.

[0106] In addition, a bus switch is provided on the circuit between the energy storage converter 212 and the circuit breaker cabinet 140 to control the on / off state of the circuit.

[0107] In some embodiments, optionally, such as Figure 5 and Figure 10As shown, the low-voltage distribution cabinet 150 includes a second line 151, a detection module 152, and a communication module 153. The second line 151 is used to connect to an external power supply 220 and also to connect to an electrical load 180 located within the cabin 110, including an air conditioning system 170. The detection module 152 is connected to the second line 151 and is used to acquire power parameters and / or temperature and humidity data of the electrical compartment 100. The communication module 153 is connected to the second line 151 and is used to communicate with the energy management system 230 (EMS). Figure 10 (As shown).

[0108] The detection module 152 can collect at least one of the following in real time during the operation of the electrical compartment 100: electrical parameters (such as voltage, current, etc.) and temperature and humidity data. The communication module 153 is connected to and powered by the second line 151. The communication module 153 can establish a communication link with the energy management system 230, upload the electrical parameters and temperature and humidity data collected by the detection module 152 to the energy management system 230, and receive instructions from the energy management system 230, thereby realizing remote monitoring and control of the operating status of the electrical compartment 100.

[0109] By setting up a second power line 151, centralized power is supplied to the electrical loads 180, such as the air conditioning system 170, within the cabin 110. The power distribution wiring is neat and the power supply architecture is clear, facilitating the integrated layout and overall power supply management of electrical equipment within the cabin 110. The detection module 152 can collect real-time power parameters and / or temperature and humidity data of the electrical cabin 100, enabling timely monitoring of equipment operating conditions and environmental status. In conjunction with the communication module 153, it communicates with the energy management system 230, enabling remote uploading of operating data and command interaction, facilitating centralized monitoring, intelligent scheduling, and operation and maintenance management of the electrical cabin 100.

[0110] Optionally, the low-voltage distribution cabinet 150 integrates a power supply module 154 (including a first line 141), a detection and measurement unit (detection module 152), and a communication unit (communication module 153). The power supply unit supplies power to the electrical loads 180 within the electrical compartment 100, including the air conditioning system 170. The detection and measurement unit measures voltage, current, power consumption, power quality, and temperature and humidity data within the compartment 110. The communication unit communicates with the overall station's energy management system 230 and / or the battery box 210.

[0111] In some embodiments, optionally, such as Figure 4 As shown, the oil-immersed transformer 120, circuit breaker cabinet 140, low-voltage distribution cabinet 150 and air conditioning system 170 are arranged along the first direction a.

[0112] Optionally, the first direction a is the length direction of the hull 110.

[0113] In some embodiments, optionally, such as Figure 2 As shown, the oil-immersed transformer 120, the circuit breaker cabinet 140 and the air conditioning system 170 are arranged along the first direction a, and the circuit breaker cabinet 140 and the low-voltage distribution cabinet 150 are arranged along the second direction b, which is inconsistent with the first direction a.

[0114] Optionally, the second direction b is the width direction of the hull 110.

[0115] In one specific embodiment, the second direction b is perpendicular to the first direction a.

[0116] By optimizing the spatial layout of various electrical devices within the cabin 110, the overall space occupied can be significantly reduced, the system integration and space utilization can be improved, and the heat exchange path between the air conditioning system 170 and the electrical devices within the cabin 110 can be shortened, which is conducive to further improving heat exchange efficiency.

[0117] In one embodiment of the present invention, such as Figure 5 As shown, the energy storage system 200 includes a battery box 210 and an electrical compartment 100 in any of the above embodiments. The circuit breaker cabinet 140 of the electrical compartment 100 is connected to the battery box 210, and the oil-immersed transformer 120 of the electrical compartment 100 is used to connect to the power grid 300.

[0118] The energy storage system 200 has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0119] In some embodiments, optionally, such as Figure 8 As shown, the battery box 210 includes a battery module 211 and an energy storage converter 212. The battery module 211 is connected to the circuit breaker cabinet 140 through the energy storage converter 212.

[0120] The energy storage converter 212 is used to convert the DC power output from the battery module 211 into AC power.

[0121] In addition, a bus switch is provided on the circuit between the energy storage converter 212 and the circuit breaker cabinet 140 to control the on / off state of the circuit.

[0122] Optionally, the energy storage system 200 adopts a string energy storage architecture. Each battery module 211 is connected to a corresponding energy storage converter 212.

[0123] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0124] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0125] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0126] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electrical cabin, characterized in that, Includes the cabin and the oil-immersed transformer, circuit breaker cabinet, low-voltage distribution cabinet and air conditioning system integrated into the cabin; The high-voltage side of the oil-immersed transformer is used to connect to the power grid, and the low-voltage side of the oil-immersed transformer is electrically connected to the circuit breaker cabinet, which is used to connect to the battery box. The low-voltage distribution cabinet is electrically connected to the air conditioning system to supply power to the air conditioning system; The circuit breaker cabinet and the low-voltage distribution cabinet are both located between the oil-immersed transformer and the air conditioning system. The air conditioning system is used to provide heat exchange for the circuit breaker cabinet and the low-voltage distribution cabinet. The airflow passes through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet and the return air outlet of the air conditioning system in sequence to form an air circulation path.

2. The electrical compartment of claim 1, wherein, A reserved air duct is provided between the air conditioning system and the low-voltage distribution cabinet. The reserved air duct is connected to the air outlet and is used for the air supplied by the air conditioning system to pass through.

3. The electrical compartment according to claim 1, characterized in that, It also includes a conductive connection component, one end of which is connected to the low-voltage side of the oil-immersed transformer, and the other end of which is connected to the circuit breaker cabinet. The airflow passes through the air outlet of the air conditioning system, the low-voltage distribution cabinet, the circuit breaker cabinet, the conductive connection component, and the return air outlet of the air conditioning system in sequence to form the air circulation path.

4. The electrical compartment according to any one of claims 1 to 3, characterized in that, The oil-immersed transformer includes: An oil-immersed load switch, wherein the side of the oil-immersed load switch connected to the power grid is the high-voltage side of the oil-immersed transformer; The fuse assembly is connected to the oil-immersed load switch; The transformer body is connected to the fuse assembly, and one side of the transformer body used to connect to the circuit breaker cabinet is the low-voltage side of the oil-immersed transformer.

5. The electrical compartment of claim 4, wherein, The fuse assembly includes at least two fuses connected in series, namely a first fuse and a second fuse. The first fuse is connected to the oil-immersed load switch, and the second fuse is connected to the transformer body.

6. The electrical compartment according to any one of claims 1 to 3, characterized in that, The outer wall of the cabin is covered with a protective coating.

7. The electrical compartment according to any one of claims 1 to 3, characterized in that, The circuit breaker cabinet includes: The first line has one end connected to the low-voltage side of the oil-immersed transformer and the other end connected to the battery box. A frame circuit breaker is installed on the first line, and the frame circuit breaker is used to control the on / off state of the first line.

8. The electrical compartment of any one of claims 1 to 3, wherein, The low-voltage distribution cabinet includes: The second line is used to connect to an external power source. The second line is also used to connect to electrical loads located inside the cabin, wherein the electrical loads include the air conditioning system. A detection module, connected to the second line, is used to acquire the electrical parameters and / or temperature and humidity data of the electrical compartment; A communication module is connected to the second line, and the communication module is used to communicate with the energy management system.

9. The electrical compartment of any one of claims 1 to 3, wherein, The oil-immersed transformer, the circuit breaker cabinet, the low-voltage distribution cabinet, and the air conditioning system are arranged along a first direction; or The oil-immersed transformer, the circuit breaker cabinet, and the air conditioning system are arranged along the first direction, and the circuit breaker cabinet and the low-voltage distribution cabinet are arranged along the second direction, which is inconsistent with the first direction.

10. An energy storage system characterized by, include: Battery box; The electrical compartment as described in any one of claims 1 to 9, wherein the circuit breaker cabinet of the electrical compartment is connected to the battery box, and the oil-immersed transformer of the electrical compartment is used to connect to the power grid.

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