Power distribution confluence cabinet

Abstract

The invention relates to the technical field of energy storage and power distribution, and discloses a power distribution confluence cabinet which comprises a cabinet body, a grid-connected circuit breaker and a standby circuit breaker assembly. The standby circuit breaker assembly is arranged in the cabinet body, so that when electric signals of a power grid exist, the system can realize grid-connected work, and the stability of power supply is guaranteed; when an electrical signal of a power grid disappears, the system can be automatically switched to an off-grid working mode, and the energy storage cabinet is connected with the busbar through a first circuit breaker in the standby circuit breaker assembly, so that continuous power supply to equipment during power failure of the power grid is realized, and the power supply is ensured not to be interrupted; the controller automatically controls operation of the grid-connected circuit breaker and the standby circuit breaker assembly by detecting changes of electrical signals of a power grid in real time, the response speed and operation reliability of the system are effectively improved, the power distribution mode can be flexibly adjusted according to the condition of the external power grid, and the self-adaptive capacity of the system is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and power distribution, and in particular to a power distribution junction cabinet. Background Art

[0002] Currently, the industrial and commercial energy storage systems on the market are mainly fixed-type standard energy storage cabinets, which are easy to install and highly modularized, and are widely used in peak load shaving and valley load filling scenarios. However, these systems have significant limitations when facing complex actual working conditions.

[0003] Existing energy storage systems are mainly designed for peak shaving and valley filling scenarios, that is, by storing energy when the grid load is low and releasing energy when the load is high to reduce electricity costs. However, when faced with more complex electricity demands (such as emergency backup power supply, photovoltaic power generation, multi-energy complementation, etc.), the functions of existing energy storage systems appear to be too single and cannot achieve effective energy management and scheduling; in addition, most energy storage cabinet systems on the market rely on the stable power supply provided by the grid as the basic support for their operation. When the grid fails or is in a state of no power supply, these systems usually cannot operate normally. This high dependence on the grid limits the application of energy storage cabinets in off-grid scenarios such as island mode and emergency power supply, reducing their flexibility and reliability. Summary of the invention

[0004] In view of this, the present invention provides a power distribution energy storage combiner cabinet to solve the problem in the prior art that the energy storage cabinet has a single function and cannot be operated off-grid.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] The present invention provides a power distribution junction cabinet, comprising: a cabinet, a grid-connected circuit breaker and a backup circuit breaker assembly; a controller and a busbar connected to the controller are arranged in the cabinet; the grid-connected circuit breaker is arranged in the cabinet and is communicatively connected to the controller, and the grid-connected circuit breaker is suitable for connecting the power grid and the busbar; the backup circuit breaker assembly is arranged in the cabinet, comprising a first circuit breaker communicatively connected to the controller, and the first circuit breaker is suitable for connecting the busbar and the energy storage cabinet; the controller detects an electrical signal of the power grid, and when the electrical signal exists, the controller controls the grid-connected circuit breaker to conduct the power grid and the busbar, so that the power distribution junction cabinet is in a grid-connected working mode, and when the electrical signal disappears, the controller controls the first circuit breaker to conduct the busbar and the energy storage cabinet, so that the power distribution junction cabinet is in an off-grid working mode.

[0007] It has the following advantages:

[0008] By setting up a backup circuit breaker assembly in the cabinet, when the grid electrical signal exists, the system can be connected to the grid to ensure the stability of power supply; when the grid electrical signal disappears, the system can automatically switch to the off-grid working mode, and connect the energy storage cabinet to the busbar through the first circuit breaker in the backup circuit breaker assembly, so as to achieve continuous power supply to the equipment when the grid power is off, ensuring uninterrupted power supply; the controller automatically controls the operation of the grid-connected circuit breaker and the backup circuit breaker assembly by detecting the changes in the grid electrical signal in real time, effectively improving the response speed and operational reliability of the system, and can flexibly adjust the power distribution mode according to the external grid conditions, enhancing the system's adaptability.

[0009] According to some embodiments of the present invention, the power distribution cabinet further comprises a load circuit breaker disposed in the cabinet, wherein the load circuit breaker is suitable for connecting the load and the bus bar, and the load circuit breaker is communicatively connected to the controller.

[0010] According to some embodiments of the present invention, the power distribution cabinet further includes a backup power supply module, and the backup power supply is electrically connected to the controller so as to be suitable for providing uninterruptible power supply to the controller.

[0011] According to some embodiments of the present invention, the backup circuit breaker assembly further includes a second circuit breaker and / or a third circuit breaker disposed in the cabinet and connected to the controller, the second circuit breaker being suitable for connecting the busbar and the photovoltaic module, and the third circuit breaker being suitable for connecting the busbar and the diesel generator set module.

[0012] According to some embodiments of the present invention, the first circuit breaker, the second circuit breaker, the third circuit breaker and the grid-connected circuit breaker are arranged in parallel.

[0013] According to some embodiments of the present invention, the power distribution cabinet further includes a lightning arrester, which is disposed in the cabinet and connected to the busbar.

[0014] According to some embodiments of the present invention, the cabinet body includes a frame, a top plate covering the top of the frame, and a left cover plate and a right cover plate covering the left and right sides of the frame. The cabinet body also includes a first cabinet door and a second cabinet door rotatably arranged on the frame, the first cabinet door and the second cabinet door are arranged opposite to each other in the front-to-back direction, and a circuit breaker bracket is assumed to be provided in the frame, and the circuit breaker bracket is suitable for installing the grid-connected circuit breaker and the backup circuit breaker assembly.

[0015] According to some embodiments of the present invention, a lifting lug is further provided on the top of the frame, and an air outlet is provided on the top plate.

[0016] According to some embodiments of the present invention, a control panel is provided on the first cabinet door, and the control panel is communicatively connected with the controller.

[0017] According to some embodiments of the present invention, a maintenance socket is provided in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the internal structure of a power distribution combiner cabinet provided in some embodiments of the present invention;

[0020] Figure 2 An exploded view of a power distribution cabinet provided by some embodiments of the present invention;

[0021] Figure 3 A circuit connection diagram of a power distribution cabinet provided in some embodiments of the present invention.

[0022] Description of reference numerals:

[0023] 1. Cabinet; 11. Frame; 12. First cabinet door; 13. Second cabinet door; 14. Lifting lug; 2. Controller; 3. Busbar; 4. Grid-connected circuit breaker; 5. Spare circuit breaker assembly; 51. First circuit breaker; 52. Second circuit breaker; 53. Third circuit breaker; 6. Load circuit breaker. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Reference Figure 1 and Figure 3 As shown, the present invention provides a power distribution junction cabinet, comprising: a cabinet 1, a grid-connected circuit breaker 4 and a backup circuit breaker assembly 5; a controller 2 and a busbar 3 connected to the controller 2 are arranged in the cabinet 1; the grid-connected circuit breaker 4 is arranged in the cabinet 1, and is communicated with the controller 2, and the grid-connected circuit breaker 4 is suitable for connecting the power grid and the busbar 3; the backup circuit breaker assembly 5 is arranged in the cabinet 1, including a first circuit breaker 51 communicated with the controller 2, and the first circuit breaker 51 is suitable for connecting the busbar 3 and the energy storage cabinet; the controller 2 detects an electrical signal of the power grid, and when the electrical signal exists, the controller 2 controls the grid-connected circuit breaker 4 to conduct the power grid and the busbar 3, so that the power distribution junction cabinet is in a grid-connected working mode, and when the electrical signal disappears, the controller 2 controls the first circuit breaker 51 to conduct the busbar 3 and the energy storage cabinet, so that the power distribution junction cabinet is in an off-grid working mode.

[0029] Specifically, by arranging a backup circuit breaker assembly 5 in the cabinet 1, when the grid electrical signal exists, the system can realize grid-connected operation to ensure the stability of power supply; when the grid electrical signal disappears, the system can automatically switch to the off-grid working mode, and connect the energy storage cabinet to the busbar 3 through the first circuit breaker 51 in the backup circuit breaker assembly 5, so as to realize continuous power supply to the equipment when the grid power is cut off, ensuring uninterrupted power supply; the controller 2 automatically controls the operation of the grid-connected circuit breaker 4 and the backup circuit breaker assembly 5 by real-time detection of changes in the grid electrical signal, which effectively improves the response speed and operation reliability of the system, can flexibly adjust the power distribution mode according to the external grid conditions, and enhances the system's adaptability.

[0030] It is understandable that the power distribution cabinet of the present application breaks through the limitation that the traditional energy storage cabinet can only work when the power grid is normal, and adds the off-grid operation function. When the power grid is out of power, the energy storage cabinet can be used to provide power supply for the load, which enhances the functionality of the energy storage cabinet and improves the emergency power supply capacity of the equipment, ensuring that the normal operation of key equipment (such as hospital equipment) can still be guaranteed when there is a problem with the power grid. The power distribution cabinet can ensure stable power supply in extreme cases, greatly improving the safety and economy of the equipment.

[0031] In some embodiments of the present invention, the power distribution cabinet further includes a load circuit breaker 6 disposed in the cabinet body 1 . The load circuit breaker 6 is suitable for connecting the load and the busbar 3 . The load circuit breaker 6 is communicatively connected to the controller 2 .

[0032] Specifically, the busbar 3 and the load are connected through the load circuit breaker 6. On the one hand, the load circuit breaker 6 can be used to distribute electric energy. On the other hand, when a fault such as overload, short circuit or undervoltage occurs, the load circuit breaker 6 can automatically cut off the circuit to prevent damage to the load equipment or accidents.

[0033] In some embodiments of the present invention, the power distribution cabinet further includes a backup power supply module, and the backup power supply is electrically connected to the controller 2 so as to provide uninterruptible power supply to the controller 2 .

[0034] Specifically, the backup power module includes a power station composed of a UPS uninterruptible power supply and an AC-DC power supply module. The backup power module is electrically connected to the controller 2 to ensure that an uninterruptible power supply is provided to the controller 2 and to ensure the reliable operation of the power distribution cabinet.

[0035] In some embodiments of the present invention, the backup circuit breaker assembly 5 also includes a second circuit breaker 52 and / or a third circuit breaker 53 disposed in the cabinet 1 and connected to the controller 2, the second circuit breaker 52 is suitable for connecting the busbar 3 and the photovoltaic module, and the third circuit breaker 53 is suitable for connecting the busbar 3 and the diesel generator module.

[0036] In some embodiments of the present invention, the first circuit breaker 51 , the second circuit breaker 52 , the third circuit breaker 53 and the grid-connected circuit breaker 4 are arranged in parallel.

[0037] Specifically, the busbar 3 and the photovoltaic module are connected through the second circuit breaker 52, and the busbar 3 and the diesel generator module are connected through the third circuit breaker 53. The first circuit breaker 51, the second circuit breaker 52 and the third circuit breaker 53 are arranged in parallel, so as to ensure that when one power supply source fails, power can be supplied through other power sources, thereby ensuring continuous power supply to the load and ensuring the stability of the off-grid working state.

[0038] In some embodiments of the present invention, the power distribution cabinet further includes a lightning arrester, which is disposed in the cabinet body 1 and connected to the busbar 3 .

[0039] Specifically, the lightning arrester protects the power distribution system from the impact of lightning strikes and ensures the safety of the equipment.

[0040] Reference Figure 2 As shown, in some embodiments of the present invention, the cabinet 1 includes a frame 11, a top plate covering the top of the frame 11, and a left cover plate and a right cover plate covering the left and right sides of the frame 11. The cabinet 1 also includes a first cabinet door 12 and a second cabinet door 13 rotatably arranged on the frame 11. The first cabinet door 12 and the second cabinet door 13 are arranged opposite to each other in the front and rear directions. A circuit breaker bracket is assumed to be provided in the frame 11, and the circuit breaker bracket is suitable for installing a grid-connected circuit breaker 4 and a standby circuit breaker assembly 5.

[0041] Specifically, the frame 11 is made of metal / alloy material and has high strength and corrosion resistance. The top plate, the left cover plate, the right cover plate, the first cabinet door 12, and the second cabinet door 13 enclose a mounting cavity to provide an installation basis for modules such as the controller 2, the grid-connected circuit breaker 4, and the backup circuit breaker assembly 5. The first cabinet door 12 and the second cabinet door 13 are rotatably arranged on the frame 11 and are arranged relative to each other to facilitate the inspection and replacement of components. A travel switch is set on the frame 11 to determine whether the first cabinet door 12 is closed in place. A display screen, a control knob, a multi-function meter, and a status indicator light are set on the side of the cabinet 1 close to the first cabinet door 12 to display the conduction status of the circuit.

[0042] In some embodiments of the present invention, a lifting lug 14 is further provided on the top of the frame 11, and an exhaust port is provided on the top plate.

[0043] Specifically, the arrangement of the lifting lug 14 facilitates the transportation of the power distribution cabinet, and an exhaust vent is arranged on the top plate, which is beneficial to the heat dissipation inside the cabinet 1 to reduce the temperature of the cabinet 1 and avoid safety accidents caused by high temperature.

[0044] In some embodiments of the present invention, a control panel is provided on the first cabinet door 12 , and the control panel is communicatively connected with the controller 2 .

[0045] In some embodiments of the present invention, a maintenance socket is provided in the cabinet 1 .

[0046] Specifically, a maintenance socket is provided in the cabinet 1. When the circuit is being repaired, the maintenance socket is used to connect the circuit and provide power, thereby performing detection in different areas and improving detection efficiency.

[0047] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A power distribution cabinet, characterized in that: include: A cabinet (1), wherein a controller (2) and a busbar (3) connected to the controller (2) are arranged in the cabinet (1); A grid-connected circuit breaker (4), arranged in the cabinet (1) and connected to the controller (2) in communication, the grid-connected circuit breaker (4) being suitable for connecting the power grid and the busbar (3); A backup circuit breaker assembly (5), arranged in the cabinet (1), comprising a first circuit breaker (51) connected to the controller (2) in communication, wherein the first circuit breaker (51) is suitable for connecting the busbar (3) and the energy storage cabinet; The controller (2) detects an electrical signal of the power grid. When the electrical signal exists, the controller (2) controls the grid-connected circuit breaker (4) to conduct the power grid and the busbar (3), so that the power distribution cabinet is in a grid-connected working mode. When the electrical signal disappears, the controller (2) controls the first circuit breaker (51) to conduct the busbar (3) and the energy storage cabinet, so that the power distribution cabinet is in an off-grid working mode.

2. The power distribution cabinet according to claim 1, characterized in that: It also includes a load circuit breaker (6) arranged in the cabinet (1), wherein the load circuit breaker (6) is suitable for connecting the load and the busbar (3), and the load circuit breaker (6) is communicatively connected to the controller (2).

3. The power distribution cabinet according to claim 1, characterized in that: It also comprises a backup power supply module, wherein the backup power supply is electrically connected to the controller (2) so as to be suitable for providing uninterrupted power supply to the controller (2).

4. The power distribution cabinet according to claim 1, characterized in that: The backup circuit breaker assembly (5) further comprises a second circuit breaker (52) and / or a third circuit breaker (53) which are arranged in the cabinet (1) and connected to the controller (2), wherein the second circuit breaker (52) is suitable for connecting the bus bar (3) and the photovoltaic module, and the third circuit breaker (53) is suitable for connecting the bus bar (3) and the diesel generator module.

5. The power distribution cabinet according to claim 4, characterized in that: The first circuit breaker (51), the second circuit breaker (52), the third circuit breaker (53) and the grid-connected circuit breaker (4) are arranged in parallel.

6. The power distribution cabinet according to claim 1, characterized in that: It also includes a lightning arrester, which is arranged in the cabinet (1) and connected to the busbar (3).

7. The power distribution combiner cabinet according to any one of claims 1 to 6, characterized in that: The cabinet (1) comprises a frame (11), a top plate covering the top of the frame (11), and a left cover plate and a right cover plate covering the left and right sides of the frame (11); the cabinet (1) further comprises a first cabinet door (12) and a second cabinet door (13) rotatably arranged on the frame (11); the first cabinet door (12) and the second cabinet door (13) are arranged opposite to each other in a front-to-back direction; a circuit breaker bracket is assumed to be provided in the frame (11); the circuit breaker bracket is suitable for installing the grid-connected circuit breaker (4) and the spare circuit breaker assembly (5).

8. The power distribution cabinet according to claim 7, characterized in that: The top of the frame (11) is also provided with a lifting lug (14), and the top plate is provided with an air outlet.

9. The power distribution cabinet according to claim 8, characterized in that: The first cabinet door (12) is provided with a control panel, and the control panel is communicatively connected with the controller (2).

10. The power distribution cabinet according to claim 1, characterized in that: A maintenance socket is provided in the cabinet (1).

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