A photovoltaic box transformer
By designing a C-shaped busbar and setting grooves on its surface, the problem of low current carrying capacity of rectangular busbars was solved, resulting in a larger surface area and stronger heat dissipation capacity, thus improving the performance of photovoltaic transformer substations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO AUX HIGH TECH
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-10
Smart Images
Figure CN224481689U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic technology, and more specifically, to a photovoltaic transformer substation. Background Technology
[0002] A photovoltaic (PV) prefabricated substation, also known as a PV box-type substation, is a new type of prefabricated substation that integrates a PV power generation AC / DC system, an inverter, a low-loss transformer, and other control systems. It organically combines the AC / DC control system, inverter, step-up system, and other control systems, achieving simplified configuration, high reliability and flexibility, safe and convenient operation and maintenance, while also offering advantages such as environmental protection, energy saving, and compact structure, meeting the requirements for PV power plants to connect to the grid.
[0003] Some existing photovoltaic transformer substations use rectangular busbars, but rectangular busbars have a small surface area, resulting in a small current carrying capacity. Utility Model Content
[0004] The purpose of this application includes, for example, providing a photovoltaic transformer that can increase the current carrying capacity of the busbar.
[0005] The embodiments of this application can be implemented as follows:
[0006] An embodiment of this application provides a photovoltaic transformer substation, which includes a transformer substation body, a busbar, a main circuit breaker, and a branch circuit breaker. The busbar, the main circuit breaker, and the branch circuit breaker are all disposed within the transformer substation body. The busbar is electrically connected to both the main circuit breaker and the branch circuit breaker. The surface of the busbar is provided with multiple grooves at intervals.
[0007] Optionally, the busbar includes a busbar body and two bent portions connected to the busbar body. Both bent portions are bent relative to the busbar body. The busbar body and the two bent portions form a C-shaped structure. Both the busbar body and the bent portions are provided with the groove.
[0008] Optionally, the photovoltaic transformer also includes a first lap joint, a first bolt, and a first nut. The first lap joint is electrically connected to the main circuit breaker. The tail of the first bolt is inserted into the C-shaped structure, and the head of the first bolt passes through the first lap joint and engages with the first nut.
[0009] Optionally, the photovoltaic transformer also includes an instrument transformer, which is disposed inside the transformer body, and the first overlapping row passes through the instrument transformer.
[0010] Optionally, the tail of the first bolt has a chamfer on the surface facing the bend.
[0011] Optionally, the photovoltaic transformer box further includes a second overlapping strip, a second bolt, and a second nut. The second overlapping strip is electrically connected to the circuit breaker. The tail of the second bolt is inserted into the C-shaped structure, and the head of the second bolt passes through the second overlapping strip and engages with the second nut.
[0012] Optionally, there may be multiple busbars, which are arranged sequentially and electrically connected to the main circuit breaker and the branch circuit breaker.
[0013] Optionally, the spacing between two adjacent busbars is greater than or equal to 20 mm.
[0014] Optionally, the photovoltaic transformer substation further includes a support component, which is disposed inside the main body of the transformer substation, and one end of the busbar is fixedly connected to the support component.
[0015] Optionally, the support member includes at least two support plates, each support plate having a slot. The two support plates are connected to form a snap-fit hole, and one end of the busbar passes through and is fixed in the snap-fit hole.
[0016] The beneficial effects of the photovoltaic transformer substation provided in this application include, for example, the following: In order to increase the current carrying capacity of the busbar, a photovoltaic transformer substation is designed. The photovoltaic transformer substation includes a transformer body, a busbar, a main circuit breaker, and a branch circuit breaker. The busbar, the main circuit breaker, and the branch circuit breaker are all disposed inside the transformer body. The busbar is electrically connected to both the main circuit breaker and the branch circuit breaker. Multiple grooves are provided at intervals on the surface of the busbar. By providing multiple grooves at intervals on the surface of the busbar, the busbar in the photovoltaic transformer substation has a larger surface area than the existing rectangular busbar, under the same cross-sectional area, thereby increasing the current carrying capacity of the busbar. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic transformer substation in the embodiments of this application;
[0019] Figure 2 This is a partial structural schematic diagram of the photovoltaic transformer substation in an embodiment of this application;
[0020] Figure 3 This is a partial structural diagram of the busbar in an embodiment of this application;
[0021] Figure 4 This is a schematic diagram of the structure of the first bolt in the embodiment of this application;
[0022] Figure 5 This is a schematic diagram of the support structure in an embodiment of this application.
[0023] Icons: 100-Transformer body; 200-Busbar; 210-Groove; 220-Busbar body; 230-Bend; 300-Main circuit breaker; 310-First overlapping strip; 320-First bolt; 321-Head; 322-Tail; 330-First nut; 400-Branch breaker; 410-Second overlapping strip; 420-Second bolt; 430-Second nut; 500-Instrument transformer; 600-Support component; 610-Support plate; 620-Snap-fit hole. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0029] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0030] As disclosed in the background section, some existing photovoltaic transformer substations use rectangular busbars, but rectangular busbars have a small surface area, resulting in a small current carrying capacity. Embodiments of this application provide a photovoltaic transformer substation that at least solves this technical problem.
[0031] Please refer to Figures 1-5 The photovoltaic transformer box provided in the embodiments of this application includes a transformer box body 100, a busbar 200, a main circuit breaker 300 and a branch circuit breaker 400. The busbar 200, the main circuit breaker 300 and the branch circuit breaker 400 are all disposed inside the transformer box body 100. The busbar 200 is electrically connected to both the main circuit breaker 300 and the branch circuit breaker 400. The surface of the busbar 200 is provided with a plurality of grooves 210 at intervals.
[0032] The transformer substation body 100 has a frame structure. The busbar 200, main circuit breaker 300 and branch circuit breaker 400 are all fixedly installed inside the transformer substation body 100. By setting multiple grooves 210 at intervals on the surface of the busbar 200, the busbar 200 has a larger surface area than the existing rectangular busbar, which increases the current carrying capacity of the busbar 200 and increases the heat dissipation area, thereby improving the heat dissipation capacity.
[0033] In this embodiment, the busbar 200 includes a busbar body 220 and two bent portions 230 connected to the busbar body 220. Both bent portions 230 are bent relative to the busbar body 220. The busbar body 220 and the two bent portions 230 form a C-shaped structure. Both the busbar body 220 and the bent portions 230 are provided with grooves 210.
[0034] The busbar body 220 and two bent portions 230 are integrally formed. The busbar body 220 is rectangular, and the two bent portions 230 are disposed opposite each other on both sides of the width direction of the busbar body 220. Multiple grooves 210 are spaced apart on the surface of the busbar body 220, and multiple grooves 210 are spaced apart on the surface of the bent portions 230. This results in a larger surface area of the busbar 200 compared to a rectangular busbar for the same cross-sectional area, thereby increasing the current carrying capacity of the busbar 200. Furthermore, the C-shaped busbar 200 has stronger axial bending resistance than a rectangular busbar, meaning its dynamic stability is better than that of a rectangular busbar.
[0035] In this embodiment, the photovoltaic transformer also includes a first lap joint 310, a first bolt 320 and a first nut 330. The first lap joint 310 is electrically connected to the main circuit breaker 300. The tail 322 of the first bolt 320 is inserted into the C-shaped structure, and the head 321 of the first bolt 320 passes through the first lap joint 310 and cooperates with the first nut 330.
[0036] One end of the first lap joint 310 is electrically connected to the main circuit breaker 300, and the side of the other end of the first lap joint 310 is fitted with two bends 230; the tail 322 of the first bolt 320 is inserted into the C-shaped structure and simultaneously fits the busbar body 220 and the two bends 230; the head 321 of the first bolt 320 extends away from the busbar body 220; after the head 321 of the first bolt 320 passes through the first lap joint 310, it engages with the first nut 330, so that the first lap joint 310 and the busbar 200 are relatively fixed.
[0037] The number of first bolts 320 and first nuts 330 can be multiple. For example, the number of first bolts 320 and first nuts 330 is three. The three first bolts 320 are arranged along the length of the busbar 200. The tails 322 of the three first bolts 320 are all inserted into the C-shaped structure. The heads 321 of the three first bolts 320 pass through the first lap joint 310 and cooperate with the three first nuts 330.
[0038] In this embodiment, the photovoltaic transformer also includes a current transformer 500, which is disposed inside the transformer body 100, and the current transformer 500 is inserted through the first overlapping row 310.
[0039] It should be noted that the current transformer 500 can monitor parameters such as current and voltage inside the photovoltaic transformer in real time and feed the data back to the monitoring system. This helps to promptly identify potential safety hazards and take appropriate measures to address them. At the same time, the current transformer 500 also provides multiple protection functions for the photovoltaic transformer, such as overvoltage, undervoltage, overcurrent, and short circuit protection, ensuring the safe operation of the photovoltaic power generation system and other electrical equipment.
[0040] In this embodiment, the tail 322 of the first bolt 320 has a chamfer on the surface facing the bent portion 230.
[0041] The tail 322 of the first bolt 320 is roughly rectangular. The surface of the tail 322 of the first bolt 320 near the two bends 230 is chamfered. During the disassembly and assembly of the first bolt 320, the tail 322 of the first bolt 320 is less likely to damage the busbar 200.
[0042] In this embodiment, the photovoltaic transformer also includes a second overlapping strip 410, a second bolt 420, and a second nut 430. The second overlapping strip 410 is electrically connected to the circuit breaker 400. The tail 322 of the second bolt 420 is inserted into the C-shaped structure, and the head of the second bolt 420 passes through the second overlapping strip 410 and engages with the second nut 430.
[0043] One end of the second lap joint 410 is electrically connected to the circuit breaker 400, and the side of the other end of the second lap joint 410 is fitted with the two bends 230; the tail of the second bolt 420 is inserted into the C-shaped structure and simultaneously fits the busbar body 220 and the two bends 230; the head of the second bolt 420 extends away from the busbar body 220; after the head of the second bolt 420 passes through the second lap joint 410, it engages with the second nut 430, so that the second lap joint 410 and the busbar 200 are relatively fixed.
[0044] The second bolt 420 has a structure that is roughly the same as the first bolt 320. The tail of the second bolt 420 is chamfered on the surface near the two bends 230. During the disassembly and assembly of the second bolt 420, the tail of the second bolt 420 is less likely to damage the busbar 200.
[0045] In this embodiment, there are multiple busbars 200, which are arranged sequentially and are electrically connected to the main circuit breaker 300 and the branch circuit breaker 400.
[0046] It should be noted that multiple busbars 200 arranged sequentially constitute a busbar group, and multiple busbar groups can be installed within the transformer substation main body 100. When there are multiple busbar groups, there are also multiple circuit breakers 400. Each busbar group is matched with one first overlapping strip 310 and multiple second overlapping strips 410. The side of the first overlapping strip 310 simultaneously abuts against multiple busbars 200 within the busbar group. Each busbar 200 is fixedly connected to the first overlapping strip 310 by a first bolt 320 and a first nut 330. The number of first bolts 320 and first nuts 330 fixing a single busbar 200 can be multiple. The side of each second overlapping strip 410 abuts against one of the busbars 200 within the busbar group, and the busbar 200 is fixedly connected to the second overlapping strip 410 by a second bolt 420 and a second nut 430.
[0047] The first connecting bar 310 in multiple busbar groups is electrically connected to the main circuit breaker 300, and the second connecting bar 410 in multiple busbar groups is electrically connected to multiple branch circuit breakers 400 respectively.
[0048] In this embodiment, the spacing between two adjacent busbars 200 is greater than or equal to 20mm.
[0049] Within a single busbar group, limiting the spacing between two adjacent busbars 200 to be greater than or equal to 20mm can improve the heat dissipation effect to a certain extent.
[0050] For example, the spacing between two adjacent busbars 200 is 20mm, 25mm or 30mm. It can be understood that the spacing between two adjacent busbars 200 can be determined according to the actual internal space of the transformer substation body 100 and the heat dissipation requirements.
[0051] In this embodiment, the photovoltaic transformer also includes a support member 600, which is disposed inside the transformer body 100, and one end of the busbar 200 is fixedly connected to the support member 600.
[0052] The support member 600 is fixed inside the transformer substation body 100. One end of the busbar 200 is fixedly connected to the support member 600. The support member 600 can support and fix the busbar 200. Multiple busbar groups can share the support member 600.
[0053] The number of support members 600 can be selected as two. The two support members 600 are arranged opposite each other along the length direction of the busbar 200, and the two ends of the busbar 200 are fixedly connected to the two support members 600 respectively. If the length of the busbar 200 is long, an additional support member 600 can be added in the middle of the busbar 200 for support.
[0054] Furthermore, the support member 600 includes at least two support plates 610, each with a slot. The two support plates 610 are connected to form a snap-fit hole 620, and one end of the busbar 200 is inserted into and fixed within the snap-fit hole 620.
[0055] In the case where a single busbar assembly includes a busbar 200, the support member 600 includes two support plates 610, both of which are provided with slots. One end of the busbar 200 passes through the snap-fit hole 620. The two support plates 610 can be fixed by fasteners such as bolts so that one end of the busbar 200 is snapped into the snap-fit hole 620.
[0056] In the case where a single busbar assembly includes two busbars 200, the support member 600 includes three support plates 610, each of which has a slot. The middle support plate 610 has slots on its surface facing the other two support plates 610. When the three support plates 610 are connected, a snap-fit hole 620 is formed between two adjacent support plates 610. One end of each of the two busbars 200 passes through the two snap-fit holes 620 and is fixed therein.
[0057] Similarly, when a single busbar group includes three or more busbars 200, the number of support plates 610 included in the support member 600 is the number of busbars 200 plus one, which will not be elaborated further.
[0058] Optionally, the busbar 200, the first lap busbar 310, and the second lap busbar 410 are all copper busbars. No holes need to be drilled on the busbar 200, which saves copper material and improves processing efficiency.
[0059] In summary, the present application provides a photovoltaic transformer box. By setting multiple grooves 210 at intervals on the surface of the busbar 200, the busbar 200 has a larger surface area than the existing rectangular busbars with the same cross-sectional area. This increases the current carrying capacity of the busbar 200 and also increases the heat dissipation area, thereby improving the heat dissipation capacity.
[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A photovoltaic transformer substation, characterized in that, The transformer includes a transformer substation body, a busbar, a main circuit breaker, and a branch circuit breaker. The busbar, the main circuit breaker, and the branch circuit breaker are all located inside the transformer substation body. The busbar is electrically connected to both the main circuit breaker and the branch circuit breaker. The surface of the busbar is provided with multiple grooves at intervals.
2. The photovoltaic transformer substation according to claim 1, characterized in that, The busbar includes a busbar body and two bent portions connected to the busbar body. Both bent portions are bent relative to the busbar body. The busbar body and the two bent portions form a C-shaped structure. Both the busbar body and the bent portions are provided with the groove.
3. The photovoltaic transformer substation according to claim 2, characterized in that, The photovoltaic transformer also includes a first lap joint, a first bolt, and a first nut. The first lap joint is electrically connected to the main circuit breaker. The tail of the first bolt is inserted into the C-shaped structure, and the head of the first bolt passes through the first lap joint and engages with the first nut.
4. The photovoltaic transformer substation according to claim 3, characterized in that, The photovoltaic transformer also includes a current transformer, which is installed inside the transformer body, and the first overlapping row passes through the current transformer.
5. The photovoltaic transformer substation according to claim 3, characterized in that, The tail of the first bolt has a chamfer on the surface facing the bend.
6. The photovoltaic transformer substation according to claim 2, characterized in that, The photovoltaic transformer also includes a second lap joint, a second bolt, and a second nut. The second lap joint is electrically connected to the circuit breaker. The tail of the second bolt is inserted into the C-shaped structure, and the head of the second bolt passes through the second lap joint and engages with the second nut.
7. The photovoltaic transformer substation according to claim 1, characterized in that, The number of busbars is multiple, and the multiple busbars are arranged sequentially. The multiple busbars are electrically connected to the main circuit breaker and the branch circuit breaker.
8. The photovoltaic transformer substation according to claim 7, characterized in that, The spacing between two adjacent busbars is greater than or equal to 20 mm.
9. The photovoltaic transformer substation according to claim 1, characterized in that, The photovoltaic transformer also includes a support component, which is disposed inside the transformer body, and one end of the busbar is fixedly connected to the support component.
10. The photovoltaic transformer substation according to claim 9, characterized in that, The support member includes at least two support plates, each with a slot. The two support plates are connected to form a snap-fit hole, and one end of the busbar passes through and is fixed in the snap-fit hole.