Direct-current 35KV confluence cabinet structure

Abstract

The utility model discloses a direct current 35KV confluence cabinet structure, which belongs to the technical field of energy storage devices and comprises a cabinet body, a front door I and a front door II are symmetrically hinged to the front end of the cabinet body, observation windows are arranged on the front door I and the front door II, an electrified display and an electromagnetic lock are arranged on the front door I, door lintels are symmetrically mounted at the top of the cabinet body, and the front door I and the front door II are connected with the cabinet body. A base is arranged at the bottom of the cabinet body, a cabinet body grounding point is arranged on the base, a transverse support and a vertical support are arranged in the cabinet body, a support is arranged at the bottom in the cabinet body, and an electric operating mechanism is arranged on the support. The DC 35KV confluence cabinet structure adopting the above structure greatly reduces the electric energy loss of lines, and effectively improves the overall power generation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to a DC 35KV combiner cabinet structure. Background Art

[0002] With the rapid development of photovoltaic power generation technology, the scale of large-scale photovoltaic power plants is increasing, and the voltage level of photovoltaic modules is gradually increasing to improve system transmission efficiency and reduce power loss. Traditional combiner cabinets, especially 1.5KV or 1KV systems, are typically used in smaller photovoltaic power plants. Although these combiner cabinets are simple in structure and relatively low in cost, their limitations become increasingly apparent as the scale of power plants expands. Due to the low voltage and high current, transmission losses in the line are high. Especially over long transmission distances, cable losses increase significantly. To reduce losses, cables often need to be thickened, which increases equipment cost and installation difficulty. Summary of the Invention

[0003] The purpose of the utility model is to provide a DC 35KV combiner cabinet structure to solve the problems mentioned in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides a DC 35KV junction box structure, including a cabinet body, wherein a front door 1 and a front door 2 are symmetrically hinged at the front end of the cabinet body, and both the front door 1 and the front door 2 are provided with observation windows. The front door 1 is provided with a power display and an electromagnetic lock. The top of the cabinet body is symmetrically installed with a lintel, the bottom of the cabinet body is provided with a base, and the base is provided with a cabinet grounding point. The inside of the cabinet body is provided with a horizontal bracket and a vertical bracket, and the bottom of the cabinet body is provided with a bracket, and the bracket is provided with an electric operating mechanism.

[0005] Preferably, a secondary distribution plate is provided at the bottom of the cabinet.

[0006] Preferably, an isolating switch is installed on the inner wall of the cabinet.

[0007] Preferably, the electric operating mechanism includes a mechanism body, a motor, a connecting rod and an isolating switch connecting rod, the mechanism body is arranged at the top of the bracket, the motor is arranged inside the mechanism body, a turntable is provided at the output end of the motor, one end of the connecting rod passes through the mechanism body and is connected to the turntable, the other end of the connecting rod is connected to the isolating switch connecting rod, and the other side of the isolating switch connecting rod is connected to the isolating switch.

[0008] Preferably, support insulator 1 and support insulator 2 are installed on the inner wall of the cabinet, support insulator 3 is provided on the top of the cabinet, and support insulator 4 is provided on the transverse bracket.

[0009] Preferably, the support insulator one, the support insulator three and the disconnecting switch are connected through an outgoing copper bar, the outgoing copper bar is provided with an outgoing copper bar terminal at the bottom, an incoming copper bar is connected between the disconnecting switch and the support insulator two, and the support insulator four is connected with the incoming copper bar through an incoming copper bar terminal.

[0010] Preferably, the cabinet body is provided with a voltage hall and a current hall at the top and the bottom respectively, and the voltage hall is connected with the outgoing copper bar at the bottom.

[0011] Preferably, one end of the outgoing copper bar is connected with a high-voltage direct-current cable, the high-voltage direct-current cable is also connected with the incoming copper bar, and the high-voltage direct-current cable is also connected with an outgoing bus bar.

[0012] Therefore, the DC 35KV busbar structure with the above structure has the following advantages:

[0013] (1) The device adopts a high-voltage direct-current system, and the current is significantly reduced compared with the busbar cabinet below 1.5KV. According to the basic principle of power transmission, the current is proportional to the line loss, so the transmission mode of high voltage and low current greatly reduces the power loss of the line. For large-scale photovoltaic power stations, especially for projects that need long-distance transmission, the device can effectively improve the overall power generation efficiency.

[0014] (2) Because the current in the device is small, the required cable cross-sectional area of the busbar cabinet is significantly reduced, which can effectively reduce the cable cost and construction complexity. In addition, the high busbar capacity of the 35kV busbar cabinet reduces the number of busbar cabinets, saving equipment and installation costs.

[0015] (3) Modular assembly, each component of the device is modularly designed, and corresponding functional modules can be added according to the needs of the use environment to realize different functions. For example, adding a hall module can realize the measurement of direct-current and voltage; and the number of controllable loops and the capacity of each loop can also be customized according to needs.

[0016] (4) The cabinet body is suitable for container assembly and can be installed in a prefabricated warehouse designed based on a container, facilitating transportation and high-quality installation work; meanwhile, the device can be conveniently disassembled and moved as a whole, and can be flexibly used as a busbar cabinet for multiple purposes.

[0017] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of a DC 35KV busbar cabinet structure according to an embodiment of the utility model;

[0019] Figure 2 Front view of the cabinet body in a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0020] Figure 3 Side view of the cabinet body in a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0021] Figure 4 Right view of the cabinet body in a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0022] Figure 5 Plan view of the cabinet body in a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0023] Figure 6 Power supply principle diagram of a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0024] Figure 7 Power supply terminal diagram of a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0025] Figure 8 Power supply terminal diagram of a direct current 35KV bus cabinet structure according to an embodiment of the present application;

[0026] Reference signs

[0027] 1, cabinet body; 2, front door one; 3, front door two; 4, observation window; 5, live display; 6, electromagnetic lock; 7, lintel; 8, base; 9, cabinet body grounding point; 10, horizontal support; 11, vertical support; 12, support; 13, electric operating mechanism; 131, mechanism body; 132, connecting rod; 133, disconnecting switch connecting rod; 14, secondary distribution panel; 15, disconnecting switch; 16, support insulator one; 17, support insulator two; 18, support insulator three; 19, support insulator four; 20, outgoing copper bar; 21, outgoing copper bar wiring terminal; 22, incoming copper bar; 23, incoming copper bar wiring terminal; 24, voltage hall; 25, current hall; 26, outgoing bus bar; 27, high-voltage direct current cable. DETAILED DESCRIPTION

[0028] The technical solutions of the present application are further described below by means of the accompanying drawings and embodiments.

[0029] 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.

[0030] Example

[0031] like Figures 1-8 As shown, the utility model provides a DC 35KV junction box structure with a rated voltage of DC 35KV and a maximum rated current of DC 200A, which is mainly used in the power systems of medium and large photovoltaic projects. Specifically, it includes a cabinet body 1, and the front end of the cabinet body 1 is symmetrically hinged with a front door 1 2 and a front door 2 3. The front door 1 2 and the front door 2 3 are both provided with an observation window 4. The front door 1 2 is provided with a power display 5 and an electromagnetic lock 6. The top of the cabinet body 1 is symmetrically installed with a lintel 7, the bottom of the cabinet body 1 is provided with a base 8, and the base 8 is provided with a cabinet grounding point 9. The inside of the cabinet body 1 is provided with a horizontal bracket 10 and a vertical bracket 11. The bottom of the cabinet body 1 is provided with a bracket 12, and the bracket 12 is provided with an electric operating mechanism 13. A secondary distribution panel 14 is provided at the bottom of the cabinet body 1 for summarizing and arranging secondary wiring, which can realize the power supply, signal transmission and switch signal control functions of the cabinet body 1. An isolating switch 15 is installed on the inner wall of the cabinet body 1.

[0032] The electric operating mechanism 13 includes a mechanism body 131, a motor, a connecting rod 132, and an isolating switch connecting rod 133. The mechanism body 131 is mounted on top of the bracket 12, and the motor is housed within the mechanism body 131. A rotary disk is located at the motor output end. One end of the connecting rod 132 passes through the mechanism body 131 and connects to the rotary disk. The other end of the connecting rod 132 connects to the isolating switch connecting rod 133, which in turn connects to the isolating switch 15. The electric operating mechanism 13 is controlled as needed to control the opening and closing of the main circuit isolating switch 15, selecting local opening / closing and remote opening / closing. This isolating switch 15 can clearly display the open / close status of the main circuit.

[0033] The support insulator one 16 and the support insulator two 17 are arranged on the inner side wall of the cabinet body 1, the support insulator three 18 is arranged on the top of the cabinet body 1, and the support insulator four 19 is arranged on the transverse support 10. The support insulator one 16, the support insulator three 18 and the disconnecting switch 15 are connected through the outgoing copper bar 20, the outgoing copper bar 20 is provided with the outgoing copper bar connecting terminal 21 at the bottom, the incoming copper bar 22 is connected between the disconnecting switch 15 and the support insulator two 17, and the support insulator four 19 is connected with the incoming copper bar through the incoming copper bar connecting terminal 23.

[0034] One end of the outgoing copper bar 20 is connected with the high-voltage direct-current cable 27, the high-voltage direct-current cable 27 is connected with the incoming copper bar 22, and the high-voltage direct-current cable 27 is also connected with the outgoing bus bar 26.

[0035] The voltage hall 24 and the current hall 25 are arranged on the top and the bottom of the cabinet body 1 respectively, and the voltage hall 24 is connected with the outgoing copper bar 20 at the bottom. The voltage hall 24 is used for measuring the direct-current loop voltage value, and the measurement precision is high. The current hall 25 is used for measuring the direct-current loop current value, and the measurement precision is high.

[0036] The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the mechanical parts and equipment adopt conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and details are not described here.

[0037] Therefore, the DC 35KV bus cabinet structure adopting the above structure greatly reduces the power loss of the line and effectively improves the overall power generation efficiency.

[0038] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can still be modified or replaced by equivalents, and these modifications or replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A 35KV DC combiner cabinet structure, characterized by: It includes a cabinet body, wherein a front door 1 and a front door 2 are symmetrically hinged at the front end of the cabinet body, and the front door 1 and the front door 2 are both provided with observation windows. The front door 1 is provided with a power display and an electromagnetic lock. The top of the cabinet body is symmetrically installed with a lintel, the bottom of the cabinet body is provided with a base, and the base is provided with a cabinet grounding point. The inside of the cabinet body is provided with a horizontal bracket and a vertical bracket, and the bottom of the cabinet body is provided with a bracket, and the bracket is provided with an electric operating mechanism.

2. The 35KV DC combiner cabinet structure according to claim 1, characterized in that: A secondary distribution plate is provided at the bottom of the cabinet.

3. The 35KV DC combiner cabinet structure according to claim 1, characterized in that: An isolating switch is installed on the inner side wall of the cabinet.

4. The 35KV DC combiner cabinet structure according to claim 1, characterized in that: The electric operating mechanism includes a mechanism body, a motor, a connecting rod and an isolating switch connecting rod. The mechanism body is arranged at the top of the bracket, the motor is arranged inside the mechanism body, a turntable is provided at the output end of the motor, one end of the connecting rod passes through the mechanism body and is connected to the turntable, the other end of the connecting rod is connected to the isolating switch connecting rod, and the other side of the isolating switch connecting rod is connected to the isolating switch.

5. The 35KV DC combiner cabinet structure according to claim 3, characterized in that: The inner wall of the cabinet is provided with a support insulator 1 and a support insulator 2, the top of the cabinet is provided with a support insulator 3, and the transverse support is provided with a support insulator 4.

6. The 35KV DC combiner cabinet structure according to claim 5, characterized in that: The first supporting insulator, the third supporting insulator and the disconnector are connected via an outgoing copper bar, a connecting terminal for the outgoing copper bar is provided at the bottom of the outgoing copper bar, an incoming copper bar is connected between the disconnector and the second supporting insulator, and the fourth supporting insulator is connected to the incoming copper bar via an incoming copper bar connecting terminal.

7. The 35KV DC combiner cabinet structure according to claim 6, characterized in that: The top and bottom of the cabinet are respectively provided with a voltage Hall and a current Hall, and the bottom end of the voltage Hall is connected to the outgoing copper bus.

8. The 35KV DC combiner cabinet structure according to claim 6, characterized in that: One end of the outgoing copper bar is connected to a high-voltage DC cable, the high-voltage DC cable is also connected to the incoming copper bar, and the high-voltage DC cable is also connected to an outgoing busbar.

Images