Highly-integrated industrial and commercial energy storage AC confluence cabinet

Abstract

The invention discloses a high-integration industrial and commercial energy storage AC confluence cabinet. A plurality of conversion systems for converting DC electric energy into electric power are integrated at the upper part of a cabinet body; the power conversion system is connected with a direct current input cable, and the alternating current side of the power conversion system is connected to the three-phase copper bar on the corresponding circuit breaker through a connecting cable; a power distribution unit, a local energy management module, an uninterruptible power supply, a power supply module and a switch are integrated on the lower portion of the cabinet body, the power distribution unit is connected with the power supply module, and the power supply module is connected with the switch and the local energy management module and supplies power to the switch and the local energy management module. The uninterruptible power supply is connected with the power supply module to provide uninterruptible power The cabinet body is provided with a shutter with multiple refraction noise reduction assemblies. According to the utility model, the problems of power conversion system adaptation, scheme flexibility, noise control, cost control and the like are solved, and a more efficient, reliable and economical solution is provided for wide application of industrial and commercial energy storage systems.

Description

Technical Field

[0001] The present invention relates to a combiner cabinet, and in particular to a highly integrated industrial and commercial energy storage AC combiner cabinet. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, industrial and commercial energy storage systems are playing an increasingly important role in power peak regulation, demand response, backup power supply and other scenarios. Industrial and commercial energy storage systems are usually composed of core components such as energy storage batteries, PCS (power conversion system), AC combiner cabinets, etc. Among them, AC combiner cabinets are key equipment for connecting energy storage systems with external power grids or loads. Their design directly affects the efficiency, reliability and flexibility of the system.

[0003] In existing industrial and commercial energy storage systems, energy storage devices usually integrate core units such as batteries, high-voltage boxes, and power conversion systems, while AC combiner cabinets are responsible for combining the AC side power of multiple energy storage devices and connecting them to external power grids or loads. This design meets the basic needs of energy storage systems to a certain extent, but there are also the following problems:

[0004] First, the PCS is integrated into the energy storage machine; since the power conversion system is integrated into the energy storage machine, and the grid connection requirements of different countries or regions are different, the power conversion system needs to be adapted or certified according to the specific project. This not only increases the technical difficulty and time cost in the early stage of the project, but may also lead to frequent adjustments to the design of the energy storage machine, affecting production efficiency and cost control.

[0005] Secondly, the solution is not flexible enough; existing AC combiner cabinets can usually only support a fixed number of energy storage integrated devices, and it is difficult to flexibly adapt to energy storage needs of different scales. For example, for small-scale energy storage projects, the capacity of the AC combiner cabinet may be excessive, while for large-scale projects, multiple combiner cabinets may need to be connected in parallel, which increases the complexity and cost of the system.

[0006] Finally, there is the issue of noise. As the market's requirements for equipment operating noise increase, the existing AC combiner cabinets have deficiencies in noise reduction design, especially when running at high loads, the noise level is high, affecting user experience and environmental friendliness. Summary of the invention

[0007] In order to solve the deficiencies of the above-mentioned technologies, the present invention provides a highly integrated industrial and commercial energy storage AC combiner cabinet.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a highly integrated industrial and commercial energy storage AC combiner cabinet, characterized in that: it includes a cabinet body, and the upper part of the cabinet body integrates multiple units for converting DC power into power conversion systems;

[0009] The DC side of the power conversion system is connected to a DC input cable entering from the bottom of the cabinet, and the AC side of the power conversion system is connected to the three-phase copper busbar on the corresponding circuit breaker through a connecting cable, which is used to control the on and off of the AC side of each power conversion system;

[0010] The lower part of the cabinet integrates a power distribution unit, a local energy management module, an uninterruptible power supply, a power module, and a switch. The power distribution unit is connected to the power module to provide power distribution control and protection. The power module is connected to and supplies power to the switch and the local energy management module. The switch interactively connects multiple power conversion systems with the local energy management module. The uninterruptible power supply is connected to the power module to provide an uninterruptible power supply.

[0011] The cabinet is equipped with shutters with multiple refraction noise reduction components.

[0012] Furthermore, the multi-refractive noise reduction component includes sound insulation cotton embedded in the shutter facing the interior of the cabinet, and the sound insulation cotton faces outward to cover the noise reduction entrance formed between the upper and lower multiple S-shaped noise reduction plates of the shutter.

[0013] Furthermore, the S-shaped noise reduction plate includes an inner connecting L-shaped plate, an outer connecting L-shaped plate, and an inclined plate obliquely connected between the inner connecting L-shaped plate and the outer connecting L-shaped plate. The opening of the inner connecting L-shaped plate of the same S-shaped noise reduction plate is set in a direction away from the cabinet and located above the outer connecting L-shaped plate, and the opening of the outer connecting L-shaped plate is set in a direction close to the cabinet.

[0014] Furthermore, the horizontal plate 1 internally connected to the L-shaped plate and the inclined plate of the S-shaped noise reduction plate above it form a noise reduction inlet; the horizontal plate 2 externally connected to the L-shaped plate and the inclined plate of the S-shaped noise reduction plate below it form a noise reduction outlet.

[0015] Furthermore, the first transverse plate of the inner connecting L-shaped plate is higher than the second transverse plate of the outer connecting L-shaped plate of the S-shaped noise reduction plate located above it.

[0016] Furthermore, the vertical plate 1 connected to the L-shaped plate internally is connected to the sound insulation cotton; the vertical plate 2 connected to the L-shaped plate externally is connected to the outer frame of the blinds.

[0017] Furthermore, there are six power conversion systems installed in two rows on the upper part of the cabinet.

[0018] Furthermore, there are six circuit breakers which are arranged in two rows in the lower left compartment of the cabinet.

[0019] Furthermore, a connecting copper busbar is installed on the circuit breaker connection post to be used for converging the AC outputs of the multi-channel power conversion system and then connecting to an external power grid or load.

[0020] Furthermore, the distribution unit, local energy management module, uninterruptible power supply, power module and switch are located in the lower right compartment of the cabinet, the distribution unit is located in the upper part of the lower right compartment, the local energy management module is located on the left side of the distribution unit, the uninterruptible power supply is located on the right side of the lower part of the lower right compartment of the cabinet, the power module is located on the left side of the lower part of the lower right compartment of the cabinet, and the switch is located on the left side of the power module.

[0021] The present invention discloses a highly integrated industrial and commercial energy storage AC combiner. The combiner integrates multiple power conversion systems in the original industrial and commercial energy storage integrated machine into the AC combiner, and supports a maximum of six power conversion systems in parallel, making the DC side energy storage cabinet more standardized. The energy storage cabinet can be mass-produced in the early stage of the project. The AC combiner can be configured with power conversion systems that meet the needs of various countries and regions according to project requirements. The grid-connected certification of the power conversion system does not affect the production of the energy storage cabinet, and can support the connection of 1 to 6 energy storage cabinets. The solution is flexible and highly adaptable. In addition, this patent also introduces multiple noise reduction technologies, and the cabinet shutters use sound insulation cotton + multiple refraction noise reduction structure design to reduce the equipment noise to the extreme. At the same time, since the AC side uses multiple power conversion systems integrated in an AC combiner, a set of UPS AC power distribution and local energy management can be shared to reduce design costs. The patented highly integrated industrial and commercial energy storage AC combiner cabinet not only solves the problem of power conversion system adaptation and certification in the existing technology, but also improves the flexibility and adaptability of the system, reduces the design and production costs, and improves the market competitiveness of the product through multiple noise reduction technologies. This innovative design provides a more efficient, reliable and economical solution for the widespread application of industrial and commercial energy storage systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the shutter.

[0024] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the circled part.

[0025] Figure 4 This is a connection diagram of six power conversion systems.

[0026] In the figure: 1. Cabinet; 2. Power conversion system; 3. Connecting cables; 4. Distribution unit; 5. Local energy management; 6. Uninterruptible power supply; 7. Power module; 8. Switch; 9. Connecting copper busbar; 10. Circuit breaker; 11. Base; 12. DC input cable; 13. Sound insulation cotton; 14. Internal connection L-shaped plate; 15. External connection L-shaped plate; 16. Inclined plate; 17. Horizontal plate one; 18. Horizontal plate two; 19. Vertical plate one; 20. Vertical plate two; 21. Shutters; 22. S-shaped noise reduction plate. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1 and Figure 4 The specific implementation of a highly integrated industrial and commercial energy storage AC junction cabinet shown is explained in detail as follows: the junction cabinet includes a cabinet body 1, and the upper part of the cabinet body integrates multiple power conversion systems 2 for converting DC power into AC power. The DC side of the power conversion system 2 is connected to a DC input cable 12 entering from the bottom of the cabinet, and the AC side of the power conversion system 2 is connected to the three-phase copper bus on the corresponding circuit breaker 10 through a connecting cable 3, which is used to control the on and off of the AC side of each power conversion system 2. A connecting copper bus 9 for connecting the AC outputs of multiple power conversion systems to an external power grid or load is installed on the wiring post of the circuit breaker 10. This design makes the DC side energy storage cabinet more standardized, and the energy storage cabinet can be mass-produced in the early stage of the project. The AC junction cabinet can be configured with power conversion systems that meet the needs of various countries and regions according to project requirements. The grid-connected certification of the power conversion system does not affect the production of the energy storage cabinet, and it can support the connection of 1 to 6 energy storage cabinets. The solution is flexible and highly adaptable. The lower part of the cabinet integrates a power distribution unit 10, a local energy management module 5, an uninterruptible power supply 6, a power module 7, and a switch 8. The power distribution unit is connected to the power module to provide power distribution control and protection. The power module is connected to and supplies power to the switch and the local energy management module. The switch interactively connects multiple power conversion systems with the local energy management module. The uninterruptible power supply is connected to the power module to provide uninterruptible power supply. This design allows the AC side to use multiple power conversion systems integrated in one AC junction cabinet, which can share a set of UPS AC power distribution and local energy management, thereby reducing design costs.

[0029] like Figure 2 and Figure 3The cabinet shown is equipped with a shutter 21 with a multiple refraction noise reduction component, which includes sound insulation cotton embedded in the shutter and facing the inside of the cabinet, and the sound insulation cotton 13 faces outward to cover the noise reduction entrance formed between the upper and lower multiple S-shaped noise reduction plates of the shutter, and the S-shaped noise reduction plate 22 includes an inner connecting L-shaped plate 14, an outer connecting L-shaped plate 15, and an inclined plate 16 obliquely connected between the inner connecting L-shaped plate and the outer connecting L-shaped plate. The opening of the inner connecting L-shaped plate of the same S-shaped noise reduction plate is set in a direction away from the cabinet and located above the outer connecting L-shaped plate, and the opening of the outer connecting L-shaped plate is set in a direction close to the cabinet. The horizontal plate 17 connected to the L-shaped plate inside and the inclined plate of the S-shaped noise reduction plate above it form a noise reduction entrance, and the horizontal plate 2 connected to the L-shaped plate outside and the inclined plate of the S-shaped noise reduction plate below it form a noise reduction exit. The horizontal plate 1 connected to the L-shaped plate inside is higher than the horizontal plate 2 18 connected to the S-shaped noise reduction plate above it outside. The vertical plate 19 connected to the L-shaped plate inside is connected to the sound insulation cotton, and the vertical plate 2 20 connected to the L-shaped plate outside is connected to the outer frame of the blinds. This multiple noise reduction technology uses the sound insulation cotton + multiple refraction noise reduction structure design of the cabinet blinds to reduce the equipment noise to the extreme and enhance the market competitiveness of the product.

[0030] The structural design of this multi-refractive noise reduction component achieves efficient noise control through the combination of sound insulation cotton and S-shaped noise reduction board. The sound insulation cotton is embedded in the blinds, facing the inside of the cabinet, and can effectively absorb the noise generated by the equipment during operation and reduce the noise from propagating to the outside. The S-shaped noise reduction board consists of an inner L-shaped board, an outer L-shaped board and an inclined board to form a multi-refractive channel. Among them, the horizontal board 1 connected to the inner L-shaped board and the inclined board above it form a noise reduction entrance, and the horizontal board 2 connected to the outer L-shaped board and the inclined board below it form a noise reduction exit. This design requires that the noise must be refracted multiple times before it can be transmitted after entering, further increasing the attenuation path of the sound wave. After the noise enters the noise reduction entrance, it undergoes multiple refractions of the inclined board, and the sound wave energy is dispersed and attenuated, thereby reducing the noise intensity. Finally, under the synergistic effect of the sound insulation cotton and the S-shaped noise reduction board, the sound insulation cotton directly absorbs part of the noise, while the S-shaped noise reduction board refracts and disperses the sound wave energy. The synergistic effect of the two greatly reduces the propagation efficiency of the noise.

[0031] The specific refraction path is that after the noise is generated from inside the cabinet, it first enters the noise reduction channel through the noise reduction entrance. The noise reduction entrance is formed by the horizontal plate 1 of the inner connecting L-shaped plate and the inclined plate of the S-shaped noise reduction plate above it. Since the horizontal plate 1 of the inner connecting L-shaped plate is higher than the horizontal plate 2 of the outer connecting L-shaped plate of the S-shaped noise reduction plate above it, when the noise enters the noise reduction entrance, the sound wave is guided to propagate in the direction of the inclined plate. After the noise enters the noise reduction entrance, it first encounters the inclined plate. The inclined plate connects the inner connecting L-shaped plate and the outer connecting L-shaped plate to form an inclined refraction surface. The sound wave undergoes the first refraction on the surface of the inclined plate, and part of the sound wave energy is reflected back to the inside of the cabinet by the horizontal plate 1 connected to the L-shaped plate inside, and the other part of the sound wave continues to propagate along the inclined plate direction, and the sound wave undergoes the second refraction on the surface of the horizontal plate 2 connected to the L-shaped plate outside, and the sound wave energy is reflected to the vertical plate 2 connected to the L-shaped plate outside, and the sound wave energy undergoes the third refraction on the vertical plate 2 connected to the L-shaped plate outside, and the sound wave propagates to the inclined plate, encounters the inclined plate again, and undergoes the fourth refraction, and the sound wave energy is reflected to the horizontal plate 1 connected to the L-shaped plate inside the S-shaped noise reduction plate below, and undergoes the fifth refraction on the horizontal plate 1 connected to the L-shaped plate inside the S-shaped noise reduction plate below. At this time, the energy of the sound wave has been greatly attenuated, and the remaining sound wave propagates outward through the noise reduction outlet. During the entire refraction process, the sound insulation cotton embedded in the blinds directly absorbs part of the sound wave energy, further reducing the noise intensity. The synergistic effect of the sound insulation cotton and the S-shaped noise reduction plate allows the noise to be absorbed and attenuated multiple times during the propagation process, ultimately achieving the ultimate noise reduction effect.

[0032] The benefits of this structure include at least: extreme noise reduction effect. Through the combination of sound insulation cotton and multiple refraction structures, the equipment noise is reduced to the extreme, meeting the market demand for low-noise equipment. Compact structure. The design is integrated into the blinds, does not take up additional space, and maintains the overall aesthetics and functionality of the cabinet. Improve market competitiveness. Through innovative noise reduction design, the user experience and market competitiveness of the product are significantly improved, and it is suitable for industrial and commercial scenarios with strict noise requirements.

[0033] In terms of installation position, there are six power conversion systems installed in two rows on the upper part of the cabinet, six circuit breakers are located in two rows in the lower left compartment of the cabinet, the power distribution unit, local energy management module, uninterruptible power supply, power module and switch are located in the lower right compartment of the cabinet, the power distribution unit is located in the upper part of the lower right compartment, the local energy management module is located on the left side of the power distribution unit, the uninterruptible power supply is located on the right side of the lower part of the lower right compartment of the cabinet, the power module is located on the left side of the lower part of the lower right compartment of the cabinet, the switch is located on the left side of the power module, and a base 11 is installed at the bottom of the compartment. This layout design makes the functional modules reasonably distributed, improving the integration and operation efficiency of the system. The highly integrated industrial and commercial energy storage AC combiner cabinet of the present invention realizes the standardized production of DC side energy storage cabinets by integrating the power conversion system into the cabinet body, and supports flexible configuration of power conversion systems that meet the grid connection requirements of different countries or regions, solving the difficult problems of power conversion system adaptation and certification in the prior art, improving the flexibility and adaptability of the system, reducing design and production costs, and at the same time improving the market competitiveness of the product through multiple noise reduction technologies, providing a more efficient, reliable and economical solution for the widespread application of industrial and commercial energy storage systems.

[0034] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the scope of the technical solution of the present invention also belong to the protection scope of the present invention.

Claims

1. A highly integrated industrial and commercial energy storage AC combiner cabinet, characterized by: It includes a cabinet, the upper part of which is integrated with a plurality of power conversion systems for converting direct current power into alternating current power; The DC side of the power conversion system is connected to a DC input cable entering from the bottom of the cabinet, and the AC side of the power conversion system is connected to the three-phase copper busbar on the corresponding circuit breaker through a connecting cable, which is used to control the on and off of the AC side of each power conversion system; The lower part of the cabinet integrates a power distribution unit, a local energy management module, an uninterruptible power supply, a power module, and a switch. The power distribution unit is connected to the power module to provide power distribution control and protection. The power module is connected to and supplies power to the switch and the local energy management module. The switch interactively connects multiple power conversion systems with the local energy management module. The uninterruptible power supply is connected to the power module to provide an uninterruptible power supply. The cabinet is equipped with a shutter with multiple refraction noise reduction components.

2. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 1 is characterized in that: The multi-refractive noise reduction component includes sound insulation cotton embedded in the shutter facing the interior of the cabinet, and the sound insulation cotton faces outward to cover the noise reduction entrance formed between the upper and lower multiple S-shaped noise reduction plates of the shutter.

3. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 2 is characterized in that: The S-shaped noise reduction plate includes an inner connecting L-shaped plate, an outer connecting L-shaped plate, and an inclined plate obliquely connected between the inner connecting L-shaped plate and the outer connecting L-shaped plate. The opening of the inner connecting L-shaped plate of the same S-shaped noise reduction plate is arranged in a direction away from the cabinet and is located above the outer connecting L-shaped plate, and the opening of the outer connecting L-shaped plate is arranged in a direction close to the cabinet.

4. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 3 is characterized in that: The horizontal plate 1 connected to the inner L-shaped plate and the inclined plate of the S-shaped noise reduction plate above it form the noise reduction entrance; the horizontal plate 2 connected to the outer L-shaped plate and the inclined plate of the S-shaped noise reduction plate below it form the noise reduction exit.

5. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 4 is characterized in that: The transverse plate 1 of the inner connecting L-shaped plate is higher than the transverse plate 2 of the outer connecting L-shaped plate of the S-shaped noise reduction plate located one level above it.

6. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 5 is characterized in that: The vertical plate 1 connected to the inner L-shaped plate is connected to the sound insulation cotton; the vertical plate 2 connected to the outer L-shaped plate is connected to the outer frame of the blinds.

7. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 1 is characterized in that: There are six power conversion systems which are installed in two rows on the upper part of the cabinet.

8. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 1 is characterized in that: There are six circuit breakers which are divided into two rows and are located in the lower left compartment of the cabinet.

9. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 7 or 8, characterized in that: A connecting copper busbar is installed on the circuit breaker connection post head for connecting the AC output of the multi-channel power conversion system to an external power grid or load.

10. The highly integrated industrial and commercial energy storage AC combiner cabinet according to claim 9 is characterized in that: The power distribution unit, local energy management module, uninterruptible power supply, power module and switch are located in the lower right compartment of the cabinet, the power distribution unit is located in the upper part of the lower right compartment, the local energy management module is located on the left side of the power distribution unit, the uninterruptible power supply is located on the right side of the lower part of the lower right compartment of the cabinet, the power module is located on the left side of the lower part of the lower right compartment of the cabinet, and the switch is located on the left side of the power module.

Images