Direct-current 1.5 KV confluence cabinet body

Abstract

The utility model discloses a direct current 1.5 KV confluence cabinet body, which belongs to the technical field of energy storage devices and comprises a cabinet body, the cabinet body comprises a cabinet body with an open front end and an open rear end, the front end and the rear end of the cabinet body are respectively hinged with a front door and a rear door through hinge structures, a base is arranged at the bottom end of the cabinet body, and the front door and the rear door are arranged on the base. Supports are arranged in the cabinet body, the supports comprise vertical supports and horizontal supports, the vertical supports are symmetrically installed in the cabinet body, the horizontal supports are transversely installed in the cabinet body, isolation switches are arranged on the vertical supports, and an electric operating mechanism and a protection mechanism are arranged in the cabinet body. According to the direct current 1.5 KV confluence cabinet body adopting the structure, the cabinet door can be opened only under the condition that equipment is powered off, and electric shock accidents are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to a DC 1.5KV busbar cabinet. Background Art

[0002] In photovoltaic power plants and other high-voltage direct current (HVDC) power systems, combiner cabinets are crucial for energy collection and transmission. Their safety is directly related to the stable operation of the entire system and the safety of operators. However, traditional combiner cabinets lack adequate safety protection measures under high voltage and high current operating conditions, especially when it comes to preventing misoperation and accidental contact, which poses significant risks.

[0003] Conventional technology typically uses mechanical locks or simple switch devices for access control, preventing personnel from opening the cabinet door while the equipment is operating. However, this traditional physical protection method has significant limitations. Operators may open the cabinet door while high-voltage equipment is energized due to negligence, misoperation, or misjudgment of the equipment status, directly contacting live components and causing serious electric shock accidents. Furthermore, traditional mechanical locks lack a mechanism to link with the system's operating status, making it impossible to effectively achieve automatic locking when electrical equipment is energized, posing a safety risk due to human error. Summary of the Invention

[0004] The purpose of the utility model is to provide a DC 1.5KV busbar cabinet to solve the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a DC 1.5KV busbar cabinet, including a cabinet body, wherein the cabinet body includes a cabinet body with open front and rear ends, the front and rear ends of the cabinet body are respectively hinged with a front door and a rear door through a hinge structure, a base is provided at the bottom end of the cabinet body, and a bracket is provided inside the cabinet body, wherein the bracket includes a vertical bracket and a horizontal bracket, the vertical bracket is symmetrically installed inside the cabinet body, and the horizontal bracket is horizontally installed to the inside of the cabinet body, an isolating switch is provided on the vertical bracket, and an electric operating mechanism and a protective mechanism are provided inside the cabinet body.

[0006] Preferably, a door lintel is symmetrically installed on the top of the cabinet body.

[0007] Preferably, an observation window is provided on the front door.

[0008] Preferably, a base grounding point is provided on the base.

[0009] Preferably, a plurality of supporting insulators are provided on the vertical support, a main circuit copper busbar is provided on the supporting insulator, and a lightning arrester is provided on the main circuit copper busbar.

[0010] Preferably, a first mounting plate, a second mounting plate and a third mounting plate are provided between the vertical supports, a plurality of first-row DC circuit breakers are provided on the second mounting plate, and a plurality of second-row DC circuit breakers are provided on the third mounting plate.

[0011] Preferably, one end of the first row of DC circuit breakers and the second row of DC circuit breakers are respectively connected to branch circuit bus copper bar one and branch circuit bus copper bar two, the incoming lines of the branch circuit bus copper bar one and the branch circuit bus copper bar two are respectively connected to the lower ports of the first row of DC circuit breakers and the second row of DC circuit breakers, and the branch circuit bus copper bar one and the branch circuit bus copper bar two are both connected to the main circuit copper bar.

[0012] Preferably, the electric operating mechanism includes a mechanism body, a motor, an operating panel, a connecting rod and an isolating switch connecting rod, the mechanism body is arranged at the bottom of the cabinet body, the motor is arranged inside the mechanism body, a turntable is provided at the output end of the motor, the operating panel is installed on the front door surface, the bottom end of the connecting rod passes through the mechanism body and is connected to the turntable, one end of the isolating switch connecting rod is arranged on the isolating switch, and the other end of the isolating switch connecting rod is connected to the connecting rod.

[0013] Preferably, the protective mechanism includes a sensor, a controller and an electromagnetic lock. The sensor is arranged on the vertical bracket, the top of the sensor is connected to the main circuit copper bus, the controller and the electromagnetic lock are both installed on the front door, and a display screen is provided on the controller.

[0014] Preferably, a voltage Hall sensor is provided on the horizontal support, and a current Hall sensor is provided on the vertical support, and the other end of the current Hall sensor is connected to the main circuit copper busbar.

[0015] Therefore, the utility model adopts a DC 1.5KV combiner cabinet body with the above structure, which has the following advantages:

[0016] (1) High degree of integration. This device is compactly designed. In a limited space, it can aggregate 12 DC bus branches and provide bus services for 12 groups of solar photovoltaic panels.

[0017] (2) Modular assembly. The modular design of each component of this device allows the addition of corresponding functional modules according to the needs of the use environment to achieve different functions. For example, adding a Hall module (i.e., voltage Hall and current Hall) can realize the measurement of DC current and voltage; adding a shunt trip module can realize remote control; adding an electric operation module (electric operating mechanism) can realize remote opening and closing and monitoring of operating status; the number of controllable circuits and the capacity of each circuit can also be customized according to needs.

[0018] (3) The cabinet is suitable for container assembly and can be installed in a prefabricated warehouse designed based on the container, which is convenient for transportation and high-completion installation. At the same time, it can also be easily disassembled and moved as a whole, and can be flexibly used as a junction cabinet for multiple purposes.

[0019] (4) When the equipment is powered on, the controller will automatically control the electromagnetic lock to be in the locked state, thereby preventing anyone from accidentally opening the cabinet door and contacting the internal live components in a high-voltage environment. This can effectively avoid the risk of electric shock caused by misoperation or careless opening of the cabinet door.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a DC 1.5KV combiner cabinet embodiment of the present invention;

[0022] Figure 2 This is a front view of a DC 1.5KV combiner cabinet embodiment of the present invention;

[0023] Figure 3 This is a front view of the interior of a DC 1.5KV combiner cabinet according to an embodiment of the present invention;

[0024] Figure 4 This is a rear view of the interior of a DC 1.5KV combiner cabinet according to an embodiment of the present invention;

[0025] Figure 5 This is a side sectional view of an embodiment of a DC 1.5KV combiner cabinet of the present invention;

[0026] Figure 6 This is a front view of a DC 1.5KV combiner cabinet embodiment of the present invention;

[0027] Figure 7 This is a diagram of power supply terminals for a DC 1.5KV combiner cabinet embodiment of the present invention;

[0028] Figure 8 This is a diagram of power supply terminals for a DC 1.5KV combiner cabinet embodiment of the present invention;

[0029] Figure 9 This is a diagram of power supply terminals for a DC 1.5KV combiner cabinet embodiment of the present invention;

[0030] Reference numerals

[0031] 1. Cabinet body; 2. Front door; 3. Base; 4. Bracket; 41. Vertical bracket; 42. Horizontal bracket; 5. Disconnector; 6. Electric operating mechanism; 61. Mechanism body; 62. Operation panel; 63. Connecting rod; 64. Disconnector connecting rod; 7. Protection mechanism; 71. Sensor; 72. Controller; 73. Electromagnetic lock; 8. Observation window; 9. Base grounding point; 10. Support insulator; 11. Main circuit busbar; 12. Lightning arrester; 13. Mounting plate 1; 14. Mounting plate 2; 15. Mounting plate 3; 16. First row of DC circuit breakers; 17. Second row of DC circuit breakers; 18. Branch circuit busbar 1; 19. Branch circuit busbar 2; 20. Voltage Hall effect detector; 21. Current Hall effect detector; 22. Door lintel; 23. Handle. DETAILED DESCRIPTION

[0032] The technical solution of the present utility model is further described below through the accompanying drawings and embodiments.

[0033] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] Example

[0035] like Figure 1-9 As shown, the utility model provides a DC 1.5KV combiner cabinet. The rated voltage of this device is DC 1.5KV and the maximum rated current is DC 3200A. It is mainly used in the power systems of medium and large photovoltaic projects.

[0036] Specifically, the cabinet comprises a cabinet body 1 with open front and rear ends. A front door 2 and a rear door are hingedly connected to the front and rear ends of the cabinet body 1 via hinged structures, respectively. The front door 2 is provided with an observation window 8 and a handle 23. A lintel 22 is symmetrically mounted on the top of the cabinet body 1. A base 3 is provided at the bottom of the cabinet body 1, and a base grounding point 9 is provided on the base 3.

[0037] A bracket 4 is provided inside the cabinet body 1, and the bracket includes a vertical bracket 41 and a horizontal bracket 42. The vertical bracket 41 is symmetrically installed inside the cabinet body 1, and the horizontal bracket 42 is horizontally installed inside the cabinet body 1. An isolating switch 5 is provided on the vertical bracket 41, and an electric operating mechanism 6 and a protective mechanism 7 are provided inside the cabinet body 1.

[0038] Several support insulators 10 are mounted on the vertical support 41, and a main circuit copper busbar 11 is mounted on each support insulator 10. A lightning arrester 12 is mounted on the main circuit copper busbar 11 to protect electrical equipment from high transient overvoltages and limit the follow-through time and amplitude. A voltage Hall sensor 20 is mounted on the horizontal support 42 to measure the DC circuit voltage with high accuracy. A current Hall sensor 21 is mounted on the vertical support 41 to measure the DC circuit current with high accuracy. The other end of the current Hall sensor 21 is connected to the main circuit copper busbar 11.

[0039] Mounting plates 13, 2, and 3 are installed between vertical supports 41. Mounting plate 2 14 houses a first row of five DC circuit breakers 16, designated as breakers 1-5. Mounting plate 3 15 houses a second row of six DC circuit breakers 17, designated as breakers 6-11. These DC breakers are suitable for 1.5 kV DC circuits and feature auxiliary contacts that indicate the open and closed status of the molded case. They also have an excitation trip function that allows for remote tripping. A shunt trip module is also included, which controls the operation of the DC breaker via a switching signal, enabling remote control.

[0040] One end of the first row of DC circuit breakers 16 and the second row of DC circuit breakers 17 are connected to branch circuit busbar 18 and branch circuit busbar 2, respectively. The incoming wires of branch circuit busbar 18 and branch circuit busbar 2, respectively, are connected to the lower ports of the first row of DC circuit breakers 16 and the second row of DC circuit breakers 17. Both branch circuit busbar 18 and branch circuit busbar 2, 19, are connected to the main circuit busbar 11. The branch circuits are connected to the main circuit via the busbars and then connected to the main circuit via the disconnector 5.

[0041] The electric operating mechanism 6 includes a mechanism body 61, a motor, an operating panel 62, a connecting rod 63 and an isolating switch connecting rod 64. The mechanism body 61 is arranged at the bottom of the cabinet body 1, the motor is arranged inside the mechanism body 61, a turntable is arranged at the output end of the motor, the operating panel 62 is mounted on the surface of the front door 2, the bottom end of the connecting rod 63 passes through the mechanism body 61 and is connected to the turntable, one end of the isolating switch connecting rod 64 is arranged on the isolating switch 5, and the other end of the isolating switch connecting rod 64 is connected to the connecting rod 63. The motor drives the turntable to rotate, which can drive the connecting rod 63 to move back and forth, and then drive the isolating switch connecting rod 64 to move, so as to control the closing and opening of the isolating switch 5. The electric operating mechanism 6 can be controlled as needed, and the opening and closing of the main circuit isolating switch 5 can be selected to be opened and closed locally and opened and closed remotely. This isolating switch 5 can display the open and closed status of the main circuit in a prominent position.

[0042] The protective mechanism 7 includes a sensor 71, a controller 72, and an electromagnetic lock 73. The sensor 71 is mounted on the vertical bracket 41. The top of the sensor 71 is connected to the main circuit copper busbar 11. The controller 72 and the electromagnetic lock 73 are both mounted on the front door 2. The controller 72 is provided with a display screen. The sensor 71 and the electromagnetic lock 73 are both electrically connected to the controller 72. The sensor 71 is connected to the 1.5KV main circuit copper busbar 11. The output signal of the secondary measurement M terminal of the sensor 71 is connected to the connection terminal of the controller 72. The passive dry contact of the output terminal of the controller 72 is connected to the control electrical circuit of the electromagnetic lock 73. When the sensor 71 detects that the main circuit is energized, the controller 72 controls the electromagnetic lock 73 to disconnect. At this time, the electromagnetic lock 73 is closed and cannot be unlocked or opened. When the sensor 71 detects that the main circuit is de-energized, the controller 72 controls the electromagnetic lock 73 to close. At this time, the electromagnetic lock 73 is energized and can be unlocked or opened. The sensor 71 checks whether the circuit is energized and transmits the detection result to the controller 72 through an electrical signal; after analysis and judgment, the controller 72 outputs the result of the energized state in the form of light; at the same time, a set of solid-state relays are used to control the power supply of the electromagnetic lock 73. When the equipment is energized, the electromagnetic lock 73 loses power, and the cabinet door cannot be opened through the electromagnetic lock 73 at this time, playing the role of five protections.

[0043] The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. In addition, the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0044] Therefore, the present invention adopts a DC 1.5KV combiner cabinet body with the above structure to ensure that the cabinet door can be opened only when the equipment is powered off, effectively preventing electric shock accidents.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A 1.5KV DC combiner cabinet, characterized by: The cabinet body comprises a cabinet body with open front and rear ends, the front and rear ends of the cabinet body are respectively hinged with a front door and a rear door through a hinge structure, a base is provided at the bottom end of the cabinet body, a bracket is provided inside the cabinet body, the bracket comprises a vertical bracket and a horizontal bracket, the vertical bracket is symmetrically installed inside the cabinet body, the horizontal bracket is horizontally installed inside the cabinet body, an isolating switch is provided on the vertical bracket, and an electric operating mechanism and a protective mechanism are provided inside the cabinet body.

2. The 1.5KV DC combiner cabinet according to claim 1, characterized in that: The top of the cabinet body is symmetrically equipped with a door lintel.

3. The 1.5KV DC combiner cabinet according to claim 1, characterized in that: An observation window is provided on the front door.

4. The 1.5KV DC combiner cabinet according to claim 1, characterized in that: A base grounding point is provided on the base.

5. The 1.5KV DC combiner cabinet according to claim 1, characterized in that: A plurality of supporting insulators are arranged on the vertical support, a main circuit copper bar is arranged on the supporting insulator, and a lightning arrester is arranged on the main circuit copper bar.

6. The 1.5KV DC combiner cabinet according to claim 5, characterized in that: A mounting plate 1, a mounting plate 2 and a mounting plate 3 are arranged between the vertical supports. A plurality of first-row DC circuit breakers are arranged on the mounting plate 2, and a plurality of second-row DC circuit breakers are arranged on the mounting plate 3.

7. The 1.5KV DC combiner cabinet according to claim 6, characterized in that: One end of the first row of DC circuit breakers and the second row of DC circuit breakers are respectively connected to a branch circuit bus copper bar one and a branch circuit bus copper bar two, the incoming lines of the branch circuit bus copper bar one and the branch circuit bus copper bar two are respectively connected to the lower ports of the first row of DC circuit breakers and the second row of DC circuit breakers, and the branch circuit bus copper bar one and the branch circuit bus copper bar two are both connected to the main circuit copper bar.

8. The 1.5KV DC combiner cabinet according to claim 1, characterized in that: The electric operating mechanism includes a mechanism body, a motor, an operating panel, a connecting rod and an isolating switch connecting rod. The mechanism body is arranged at the bottom of the cabinet body, the motor is arranged inside the mechanism body, a turntable is provided at the output end of the motor, the operating panel is installed on the surface of the front door, the bottom end of the connecting rod passes through the mechanism body and is connected to the turntable, one end of the isolating switch connecting rod is arranged on the isolating switch, and the other end of the isolating switch connecting rod is connected to the connecting rod.

9. The 1.5KV DC combiner cabinet according to claim 5, characterized in that: The protection mechanism includes a sensor, a controller and an electromagnetic lock. The sensor is arranged on the vertical bracket. The top of the sensor is connected to the main circuit copper bus. The controller and the electromagnetic lock are both installed on the front door. The controller is provided with a display screen.

10. The 1.5KV DC combiner cabinet according to claim 5, characterized in that: The horizontal support is provided with a voltage Hall, the vertical support is provided with a current Hall, and the other end of the current Hall is connected to the main circuit copper busbar.

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