Power module cabinet and power distribution system comprising same

Abstract

The utility model provides a power module cabinet and a power distribution system comprising the same. The power module cabinet comprises a transformer cabinet, a wire inlet cabinet, a reactive compensation cabinet, a UPS group cabinet, a bypass cabinet and a wire outlet cabinet. The UPS group cabinet is formed by parallel operation of one or more UPS cabinets with rated capacity, and one UPS device, one UPS input switch and one UPS output switch are integrated in each single UPS cabinet. The top of the power module cabinet is provided with a front group of buses and a rear group of buses, including a main bus and a UPS integrated bus. The UPS input switch is connected with the main bus, and the UPS output switch is connected with the UPS integrated bus. The UPS equipment and the input and output switches of the UPS equipment are integrated in each UPS cabinet in the UPS group cabinet, so that the integration level and the compactness of the UPS system can be improved, and the occupied area of the power module is reduced. The front and rear groups of buses are arranged at the top of the power module cabinet, so that the wiring mode is simple in structure and easy to maintain, and the wiring cost can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a power module cabinet and a power distribution system comprising the same. BACKGROUND

[0002] With the digital transformation of the global economy, the digital economy has become a new engine driving economic growth. In this process, data centers play a crucial role as they are not only the center of data storage and processing, but also the key infrastructure supporting cutting-edge technologies such as cloud computing, big data analysis, artificial intelligence, etc. Therefore, the construction and development of data centers must keep pace with the rapid pace of digital economy to meet the growing demand for data processing. The construction of data centers faces multiple challenges, including rapid deployment, high reliability, flexibility, and space optimization, etc.

[0003] A power module cabinet (Power Module) generally refers to a unit that integrates multiple power functions, which can be a cabinet or a group of cabinets. It integrates key components such as transformers, switchboards, uninterruptible power supply (UPS) systems, monitoring systems, etc. in a modular unit, aiming to simplify the deployment, management, and maintenance of power infrastructure in data centers and other places that require stable power supply. In application scenarios such as data centers, power modules provide an efficient, safe, intelligent, and flexible power supply solution through centralized control, factory prefabrication, PUE measurement, etc. Although traditional prefabricated power modules meet these needs to some extent, there are still some problems in actual application; for example, the busbar connection structure is complex, installation and maintenance are difficult, the occupied area is too large, and the space utilization efficiency is low, etc. CONTENT OF THE UTILITY MODEL

[0004] To solve the above problems, the present application provides a power module cabinet and a power distribution system comprising the same, which can reduce the occupied area, simplify the wiring method, and save the wiring cost.

[0005] According to a first aspect, a power module cabinet is provided, comprising a transformer cabinet, an incoming line cabinet, a reactive power compensation cabinet, a UPS group cabinet, a bypass cabinet, and an outgoing line cabinet. The UPS group cabinet is composed of one or more UPS cabinets with rated capacity in parallel. Each single UPS cabinet integrates one UPS device, one UPS input switch, and one UPS output switch. The top of the power module cabinet is provided with two groups of busbars, including a main busbar and a UPS integrated busbar. The UPS input switch is connected to the main busbar, and the UPS output switch is connected to the UPS integrated busbar.

[0006] Preferably, in the single UPS cabinet, the UPS input switch is connected with the input end of the UPS device, and the UPS output switch is connected with the output end of the UPS device.

[0007] Preferably, in the single UPS cabinet, the UPS input switch is connected with the input end of the UPS device by copper bar hard connection, and the UPS output switch is connected with the output end of the UPS device by copper bar hard connection.

[0008] Preferably, in the single UPS cabinet, the UPS input switch and the UPS output switch are longitudinally distributed.

[0009] Preferably, the UPS input switch is connected with the main bus by copper bar hard connection, and the UPS output switch is connected with the UPS integrated bus by copper bar hard connection.

[0010] Preferably, the main bus and the UPS integrated bus are parallel to each other.

[0011] Preferably, the main bus and the UPS integrated bus are in the same horizontal plane.

[0012] Preferably, the transformer cabinet, the incoming line cabinet, the reactive compensation cabinet, the UPS group cabinet, the bypass cabinet and the outgoing line cabinet are connected by copper bar hard connection.

[0013] Preferably, the power module cabinet is a low-voltage power module cabinet.

[0014] According to a second aspect, a power distribution system is provided, comprising the power module cabinet according to any one of the first aspect.

[0015] The present application provides a power module cabinet integrating the functions of power transformation, power distribution, UPS and compensation, etc. By integrating the UPS device and its input and output switches in each UPS cabinet in the UPS group cabinet, the integration and compactness of the UPS system can be improved, the land occupation of the power module can be reduced, and the installation and maintenance work can be simplified. The high-density power supply and high-heat-dissipation density can be maintained while maintaining a reasonable space ratio, which is more low-carbon and environmentally friendly. Two groups of buses are arranged on the top of the power module cabinet, which has a simple wiring structure and is easy to maintain, and can save wiring costs. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a power module cabinet according to an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of a combination of a UPS cabinet and a 2ACB low-voltage cabinet according to the prior art;

[0018] Figure 3is a schematic diagram of a UPS cabinet according to an embodiment of the present application;

[0019] Figure 4 is a schematic diagram of equipment distribution in a UPS cabinet according to an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of a prior art cabinet top busbar arrangement; and

[0021] Figure 6 is a schematic diagram of a cabinet top busbar arrangement according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] Specific embodiments of the present application will now be described in detail with reference to the drawings, where like reference numerals designate identical or corresponding components. The specific embodiments are presented herein for purposes of illustration and description only, and are not intended to limit the scope of the present application. Furthermore, the described embodiments are not intended to be exhaustive or to be limited to the precise forms disclosed. Many modifications and variations are possible in light of the above teachings. It is intended that the scope of the present application extend to all such modifications and variations. It is intended that the scope of the present application encompass the full range of equivalents.

[0023] As shown in Figure 1 , the present application provides a power module cabinet which integrates the functions of power transformation, power distribution, UPS, compensation, etc. The power module cabinet includes a transformer cabinet 101, a low-voltage incoming line cabinet 102, a reactive power compensation cabinet 103, a UPS group cabinet 104, a bypass cabinet 105, and an outgoing line cabinet 106.

[0024] The transformer cabinet 101 is used to convert the high-voltage power supply introduced from the external power grid into a low-voltage power supply (e.g., 400V) suitable for user use. The transformer cabinet 101 is provided with a transformer and protection and control devices. The low-voltage incoming line cabinet 102 is a switch cabinet for introducing power from the low-voltage side of the transformer of the transformer cabinet 101, and is usually responsible for introducing and distributing low-voltage power to the busbar.

[0025] The incoming line cabinet 102 is provided with incoming line breakers, current transformers, arresters, and other components, and has protection, metering, monitoring, and other functions. The reactive power compensation cabinet (SVG) is used to improve the power factor of the power system and reduce energy loss.

[0026] The reactive power compensation cabinet 103 can dynamically compensate for reactive power and improve the efficiency of the power grid. The reactive power compensation cabinet 103 is provided with breakers, current transformers, arresters, SVG static reactive power generators, and APF active filters.

[0027] The UPS group cabinet 104 can be formed by one or more rated capacity UPS cabinets, each of which is provided with a rated capacity UPS device, capable of providing stable and uninterrupted power supply, ensuring that the critical load can continue to operate during power interruption, storing energy when the power grid is normal, and providing backup power when the power grid fails.

[0028] The bypass cabinet 105 is provided with bypass circuit breakers, current transformers and other components, which can directly supply power to the load during UPS maintenance. In this way, the critical load will not be powered off even during UPS maintenance.

[0029] The outgoing cabinet 106 is used to distribute the low-voltage power converted by the transformer to the final load. The outgoing cabinet is provided with circuit breakers, current transformers and other components for controlling and protecting power distribution.

[0030] In this power module cabinet, the transformer cabinet 101 converts external high-voltage power into low-voltage power, the transformer low-voltage side is connected to the low-voltage incoming cabinet 102, and then the low-voltage power is transmitted to the outgoing cabinet 106 through the top main bus to be distributed to the load. The reactive power compensation cabinet 103 can be connected to the output main bus after the low-voltage incoming cabinet 102 to optimize the power factor. The bypass cabinet 105 connects the main bus and the UPS integrated bus through the bypass circuit breaker to ensure continuous power supply to the load during UPS maintenance or failure.

[0031] In this power module cabinet, the UPS group cabinet 104 is usually formed by one or more rated capacity UPS cabinets, and in order to facilitate the switching in and out of each UPS cabinet, the UPS cabinet usually has disconnectors at the input and output ends. Since the disconnectors do not have short-circuit protection function for the entire UPS device, each UPS cabinet generally needs to be equipped with an air circuit breaker (ACB) at its input and output ends to protect the entire UPS device. At the same time, the ACB can also replace the function of the disconnectors (the disconnectors remain in the UPS device), realizing the switching in and out of the UPS device. As shown in Figure 2 The conventional method is to additionally configure a low-voltage circuit breaker cabinet 202 (referred to as 2ACB low-voltage cabinet) with input and output dual ACB for each UPS cabinet 201. Taking a 2.5MW power module as an example, four 600kVA UPS cabinets are required for a module, and four 2ACB low-voltage cabinets are required as input and output of the UPS cabinets to cooperate with the UPS device. The cabinet body width of a UPS cabinet is usually 1200mm, and the cabinet body width of a 2ACB low-voltage cabinet configured by the UPS cabinet is usually 600mm. This configuration increases the length and occupied area of the power module, and the ACB cabinet, UPS cabinet and main bus have complex wiring structure, which is difficult to install and maintain and has high use cost.

[0032] In yet another embodiment of this application, the UPS cabinet 104 employs a UPS cabinet with a novel structure. For example... Figure 3 As shown, the isolating switch is no longer retained in this UPS cabinet; instead, it is replaced by a UPS input switch (i.e., a UPS input circuit breaker) and a UPS output switch. The UPS input and output switches can be installed in the original location of the isolating switch. That is, each UPS cabinet 301 integrates one UPS device 201, one UPS input switch 3011, and one UPS output switch 3012. The UPS input switch 3011 and UPS output switch 3012 function the same as a 2ACB low-voltage cabinet 202, used for switching the UPS device in and out. Taking a 2.5MW power module as an example, compared to... Figure 2 Assuming the module is configured with four 600kVA UPS cabinets according to this embodiment, the cost of four 2ACB low-voltage cabinets can be saved, and the overall width is reduced by 2400mm, resulting in space savings of up to 33%. By integrating the UPS equipment and its input / output switches within the UPS cabinet, the integration and compactness of the UPS system can be improved, the footprint of the power module can be reduced, and installation and maintenance can be simplified. Maintaining a reasonable space ratio while achieving high-density power supply and high heat dissipation density is also more carbon-efficient and environmentally friendly.

[0033] In some embodiments, a cable connection can be used between the UPS input switch 3011 and the input terminal of the UPS device 201, and between the UPS output switch 3012 and the output terminal of the UPS device 201. Preferably, considering the reliability and stability of the connection, a copper busbar rigid connection is used between the UPS input switch 3011 and the input terminal of the UPS device, and between the UPS output switch 3012 and the output terminal of the UPS device. Using a copper busbar rigid connection instead of a traditional cable connection can improve the reliability, stability, and conductivity of the connection, and reduce contact resistance and heat loss.

[0034] In some embodiments, within the UPS cabinet 301, the UPS input switch 3011 and UPS output switch 3012 are longitudinally distributed. This optimizes the spatial layout, improves the utilization of space within the cabinet, facilitates connections between the input / output switches, the main bus, and the UPS integrated bus, and also aids in heat dissipation and maintenance. Figure 4 As shown, preferably, the UPS input switch 3011 and the UPS output switch 3012 are located on the same longitudinal axis, and the UPS device 201 is located on one side of this longitudinal axis. This can reduce the use of copper busbars connecting the three, reduce line loss, and improve the reliability and efficiency of the system.

[0035] Since the configuration distribution in the UPS cabinet of the embodiment of the present application is different from that of the conventional UPS cabinet, the connection mode of the UPS input and output switches and the main bus and the UPS integrated bus is also different. In the conventional scheme, since the 2ACB low-voltage cabinet is arranged in cooperation with the UPS cabinet, in the mode of the incoming and outgoing lines being in the upper-in upper-out mode, in order to realize the hard connection of the copper bars between the UPS cabinet and the 2ACB low-voltage cabinet, as shown in Figure 5 , the prior art usually arranges double-layer buses (i.e., four groups of buses) on the top of the cabinet. Among them, the upper-layer main bus in the front part of the cabinet top is the power supply bus, which is connected with the UPS input switch (i.e., the input ACB in Figure 5 ). The lower-layer UPS integrated bus in the front part of the cabinet top is connected with the UPS output switch (i.e., the output ACB in Figure 5 ). The upper-layer bus in the rear part of the cabinet top is connected with the input end of the UPS cabinet and the UPS input switch. The lower-layer bus in the rear part of the cabinet top is connected with the output end of the UPS cabinet and the UPS output switch. Such a connection structure is complex, has high cost and is not easy to install, has insulation risks and affects the dynamic stability and thermal stability of the entire module.

[0036] In the embodiment of the present application, as shown in Figure 6 , since the UPS input switch 3011 and the UPS output switch 3012 are integrated into the UPS cabinet 301 together with the UPS device 201, in the mode of the upper-in upper-out, only two groups of buses, i.e., the main bus 601 and the UPS integrated bus 602, need to be arranged on the top of the power module cabinet. Among them, the UPS input switch 3011 is connected with the main bus 601 at the front top of the cabinet, and the UPS output switch 3012 is connected with the UPS integrated bus 602 at the rear top of the cabinet. Such a connection wiring mode is simple and easy to operate, can save the wiring cost, and improve the heat dissipation efficiency.

[0037] In some embodiments, the UPS input switch 3011 and the main bus 601, and the UPS output switch 3012 and the UPS integrated bus 602 can be connected by cables. Preferably, considering the reliability of the connection, the UPS input switch 3011 and the main bus 601, and the UPS output switch 3012 and the UPS integrated bus 602 are connected by copper bars. By arranging two groups of buses on the top of the cabinet and using the hard connection of the copper bars, the reliability of the connection can be ensured, the use cost of the copper bars can be saved, and the dynamic stability of the power module can be improved. Taking a 2.5MW capacity power module as an example, the copper material consumption of the entire module cabinet top bus is about 2000kg by using the bus arrangement mode of the prior art. By using the bus arrangement mode of the embodiment of the present application, the copper material consumption of the entire module cabinet top bus is about 1600kg, which saves about 20% of the copper bars. By using the hard connection of the copper bars, the efficiency and stability of the power transmission can be improved, and the failure rate of the connection points can be reduced.

[0038] In some embodiments, the main bus 601 and the UPS integrated bus 602 are parallel to each other. The parallel wiring manner can simplify the wiring inside the cabinet and on the cabinet top, improve the convenience and aesthetics of installation, and also help to reduce electromagnetic interference.

[0039] In some embodiments, the main bus 601 and the UPS integrated bus 602 are in the same horizontal plane, i.e., the cabinet top bus is arranged in a single layer. Placing the main bus and the UPS integrated bus in the same horizontal plane can further optimize the space layout, improve the convenience of installation and maintenance, and also help to improve the stability of the power module.

[0040] In some embodiments, copper bar hard connection is used between the transformer cabinet 101, the incoming line cabinet 102, the reactive compensation cabinet 103, the UPS cabinet group 104, the bypass cabinet 105, and the outgoing line cabinet 106. Using copper bar hard connection can improve the electrical performance and mechanical stability of the entire power module cabinet, reduce connection failures, and improve the reliability of the system.

[0041] In some embodiments, the power module cabinet is a low-voltage power module cabinet. The low-voltage power module cabinet is integrated by the transformer cabinet, the incoming line cabinet, the reactive compensation cabinet, the UPS cabinet group, the bypass cabinet, and the outgoing line cabinet, and can meet the requirements of 2.5MW capacity or less. It can flexibly ensure the design and application of the targeted nature, meet the needs of low-voltage power distribution systems, and improve the safety and applicability of the system. For example, the internal connection of the low-voltage power module cabinet and the UPS cabinet group can all use copper bar hard connection, the mode is upper-in and upper-out, the main bus uses a single-layer bus arrangement, and the maximum current can reach 5000A. The low-voltage power module cabinet can have a uniform depth of 1200mm, a uniform height of 2400mm, and a width that can be flexibly designed as 600 / 800 / 1000 / 1350mm, etc.

[0042] According to one embodiment of the present application, an electrical power distribution system is also provided, which includes the power module cabinet of any of the above embodiments. The electrical power distribution system including the above power module cabinet can provide an efficient, reliable, flexible, and high-integration power distribution solution, which is suitable for various occasions requiring stable power supply, such as data centers, industrial automation, etc.

[0043] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A power module cabinet, comprising a transformer cabinet, an incoming line cabinet, a reactive compensation cabinet, a UPS group cabinet, a bypass cabinet and an outgoing line cabinet, characterized in that, the UPS group cabinet is composed of one or more UPS cabinets with the same rated capacity, and each single UPS cabinet is integrated with one UPS device, one UPS input switch and one UPS output switch; the top of the power module cabinet is provided with two groups of busbars, including a main busbar and a UPS integrated busbar; the UPS input switch is connected with the main busbar, and the UPS output switch is connected with the UPS integrated busbar.

2. The power module cabinet of claim 1, wherein, In the single UPS cabinet, the UPS input switch is connected with the input end of the UPS device, and the UPS output switch is connected with the output end of the UPS device.

3. The power module cabinet of claim 2, wherein, In the single UPS cabinet, the UPS input switch is hard connected with the input end of the UPS device by copper bars, and the UPS output switch is hard connected with the output end of the UPS device by copper bars.

4. The power module cabinet of claim 1, wherein, In the single UPS cabinet, the UPS input switch and the UPS output switch are longitudinally distributed.

5. The power module cabinet of claim 1, wherein, The UPS input switch is hard connected with the main busbar by copper bars, and the UPS output switch is hard connected with the UPS integrated busbar by copper bars.

6. The power module cabinet according to any one of claims 1 to 5, characterized in that The main busbar and the UPS integrated busbar are parallel to each other.

7. The power module cabinet according to any one of claims 1 to 5, characterized in that The main busbar and the UPS integrated busbar are in the same horizontal plane.

8. The power module cabinet of claim 1, wherein, The transformer cabinet, the incoming line cabinet, the reactive compensation cabinet, the UPS group cabinet, the bypass cabinet and the outgoing line cabinet are hard connected by copper bars.

9. The power module cabinet of claim 1, wherein, The power module cabinet is a low-voltage power module cabinet.

10. A power distribution system characterized by, The power module cabinet according to any one of claims 1-9. The power module cabinet according to any one of claims 1-9.

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