Energy storage converter and voltage booster integrated machine

Abstract

The utility model discloses a kind of energy storage current transformer boost integrated machines, comprising: combined transformer;Two energy storage current transformers, two energy storage current transformers are respectively arranged in the left and right sides of combined transformer;Two bus bridges, two bus bridges are respectively arranged in the left and right sides of combined transformer, bus bridge includes bridge body and busbar row, bridge body includes first connecting section, second connecting section and vertical section, vertical section is arranged between energy storage current transformer and combined transformer, first connecting section is arranged in the upper end of vertical section and is connected with combined transformer, the side wall of first connecting section is equipped with first heat dissipation hole, first heat dissipation hole is communicated with the inner chamber of first connecting section, second connecting section is arranged in the lower end of vertical section and is connected with energy storage current transformer, busbar row is arranged in bridge body and is arranged along the trend of bridge body, the two ends of busbar row are respectively connected with combined transformer and energy storage current transformer electrically.The utility model can solve the heat dissipation problem of energy storage current transformer boost integrated machine and reduce the occupied space.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to an integrated energy storage converter and booster unit. Background Technology

[0002] Existing integrated energy storage converter-boost systems mainly consist of a medium-voltage ring main unit, an oil-immersed transformer, a power conversion system (PCS), and a bus system. All components are housed within a metal casing. Especially when multiple PCSs are used, the transformer often requires a double-split structure, with the low-voltage side wiring components located at the bottom of the transformer and the PCS positioned on either side. Because a separate medium-voltage ring main unit compartment is required, and fans are added for cooling while considering heat dissipation performance, the layout of the integrated energy storage converter-boost system requires a large space, resulting in low space utilization. Furthermore, cooling via fans necessitates consideration of the fans' mechanical lifespan and maintenance, significantly increasing the maintenance costs of the integrated energy storage converter-boost system. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an integrated energy storage, converter, and boost converter.

[0004] The solution to the technical problem of this utility model is:

[0005] An integrated energy storage converter and boost converter includes:

[0006] Combined transformer;

[0007] Two energy storage converters are respectively located on the left and right sides of the combined transformer;

[0008] Two busbar bridges are respectively located on the left and right sides of the combined transformer. Each busbar bridge includes a bridge body and a busbar. The bridge body includes a first connecting section, a second connecting section, and a vertical section. The vertical section is located between the energy storage converter and the combined transformer. The first connecting section is located at the upper end of the vertical section and is connected to the combined transformer. The side wall of the first connecting section is provided with a first heat dissipation hole, which communicates with the inner cavity of the first connecting section. The second connecting section is located at the lower end of the vertical section and is connected to the energy storage converter. The busbar is located inside the bridge body and arranged along the direction of the bridge body. The two ends of the busbar are electrically connected to the combined transformer and the energy storage converter, respectively.

[0009] This utility model has at least the following beneficial effects: Since the use of a combined transformer eliminates the need for a separate medium-voltage ring main unit, it reduces the space occupied by the integrated energy storage converter and step-up unit; during use, hot air rises along the vertical section of the busbar bridge to the first connecting section and is naturally discharged, utilizing the chimney effect to achieve natural heat dissipation, eliminating the need for additional fans to solve the heat dissipation problem, reducing the space occupied by fans, and avoiding the problems of short mechanical life and difficult maintenance caused by fan cooling, thus reducing the maintenance cost of the integrated energy storage converter and step-up unit.

[0010] As a further improvement to the above technical solution, the combined transformer includes an oil tank, a high-voltage compartment and a heat sink. The high-voltage compartment and the heat sink are respectively located on the front and rear sides of the oil tank. A set of low-voltage outgoing bushings is provided on the left and right sides of the oil tank, and the two sets of low-voltage outgoing bushings are respectively connected to the upper end of the busbar.

[0011] As a further improvement to the above technical solution, the low-voltage outlet bushing is located at the upper part of the oil tank, and the top of the oil tank is provided with a top cover, which is used to open or close the inner cavity of the oil tank.

[0012] As a further improvement to the above technical solution, the width of the vertical section gradually increases from bottom to top along the front-back direction.

[0013] As a further improvement to the above technical solution, the first heat dissipation hole is provided on the front wall and the rear wall of the first connecting section.

[0014] As a further improvement to the above technical solution, the second connecting section is provided with a second heat dissipation hole, which is located on the front or rear wall surface of the second connecting section.

[0015] As a further improvement to the above technical solution, the vertical section includes a mounting body and a side cover, the side cover being detachably connected to the left or right end of the mounting body.

[0016] As a further improvement to the above technical solution, the integrated energy storage converter and boost converter also includes:

[0017] The container includes an integrated frame and two partitions. The partitions are connected to the integrated frame and divide the inner cavity of the integrated frame into a first mounting cavity and two second mounting cavities. The two second mounting cavities are located on the left and right sides of the first mounting cavity, respectively. The lower end of the partition is provided with a cable passage to allow the lower ends of the first mounting cavity and the second mounting cavities to communicate with each other. The combined transformer is located in the first mounting cavity, and the two energy storage converters are located in the two second mounting cavities, respectively. The lower end of the second mounting cavity is provided with a support base. The bottom surface of the energy storage converter is connected to the support base and forms a cable passage space with the bottom surface of the second mounting cavity. The first connecting section and the vertical section are located in the first mounting cavity. The second connecting section passes through the cable passage and extends into the cable passage space. The upper end surface of the second connecting section is connected to the bottom of the energy storage converter.

[0018] As a further improvement to the above technical solution, the container also includes two equipment doors, which are located on the front and rear sides of the first mounting cavity and are movably connected to the integrated frame to open or close the first mounting cavity. The equipment doors are provided with a third heat dissipation hole, which communicates with the first mounting cavity.

[0019] As a further improvement to the above technical solution, the container also includes a top cover, which covers the first mounting cavity and is detachably connected to the upper end of the integrated frame. The top cover is provided with a fourth heat dissipation hole, which communicates with the first mounting cavity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the energy storage converter booster integrated machine according to an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the combined transformer according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the busbar bridge structure according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of a busbar bridge according to another embodiment of the present invention;

[0025] Figure 5This is a schematic diagram of the structure of a container according to an embodiment of the present invention.

[0026] Reference numerals: 100, Combined transformer; 110, Oil tank; 120, High-voltage compartment; 130, Heat sink; 140, Low-voltage outgoing bushing; 150, Instrument box; 200, Energy storage converter; 300, Busbar bridge; 310, First connecting section; 311, First heat dissipation hole; 320, Second connecting section; 321, Second heat dissipation hole; 330, Vertical section; 331, Handle; 340, Busbar; 400, Container; 410, Integrated frame; 420, Partition plate; 421, First mounting cavity; 422, Second mounting cavity; 423, Cable passage; 430, Equipment door; 431, Third heat dissipation hole; 440, Top cover; 441, Fourth heat dissipation hole; 450, Support base; 451, Cable passage space; 452, Fifth heat dissipation hole. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.

[0032] Reference Figures 1 to 5 This utility model embodiment proposes an integrated energy storage converter and step-up unit, including a combined transformer 100, two energy storage converters 200, and two bus bridges 300. The two energy storage converters 200 are respectively arranged on the left and right sides of the combined transformer 100, and the energy storage converters 200 and the combined transformer 100 are electrically connected through the bus bridges 300. This integrated energy storage converter and step-up unit can realize energy storage, conversion, and voltage boosting functions, and can solve the heat dissipation problem of existing integrated energy storage converters and step-up units, avoiding the problems of short mechanical life and difficult maintenance caused by using fan cooling. It also reduces the layout space and improves space utilization.

[0033] In this embodiment, busbar bridges 300 are respectively arranged on the left and right sides of the combined transformer 100. Each busbar bridge 300 includes a bridge body and busbars 340. (Refer to...) Figure 3 and Figure 4 The bridge body includes a first connecting section 310, a second connecting section 320, and an upright section 330. The upright section 330 is located between the energy storage converter 200 and the combined transformer 100. The first connecting section 310 is located at the upper end of the upright section 330 and is connected to the side of the combined transformer 100. The side wall of the first connecting section 310 is provided with a first heat dissipation hole 311, which communicates with the inner cavity of the first connecting section 310. The second connecting section 320 is located at the lower end of the upright section 330 and is connected to the energy storage converter 200. The busbar 340 is located inside the bridge body and is arranged along the direction of the bridge body. The two ends of the busbar 340 are electrically connected to the combined transformer 100 and the energy storage converter 200, respectively.

[0034] Understandably, the high-voltage side of the combined transformer 100 receives electrical energy via an elbow cable that can be plugged in and out under load, while a low-voltage outgoing line component is installed outside the oil tank 110. Using the combined transformer 100 eliminates the need for a separate medium-voltage ring main unit, reducing the space occupied by the integrated energy storage converter and step-up unit.

[0035] During use, the busbar 340 is electrically connected to the low-voltage outgoing components of the combined transformer 100. Since the busbar 340 is provided with a vertical section 330, and the first connecting section 310 located at the upper end of the vertical section 330 is provided with a first heat dissipation hole 311 communicating with the inner cavity, hot air rises along the vertical section 330 of the busbar bridge 300 to the first connecting section 310 and is naturally discharged. Natural heat dissipation can be achieved by utilizing the chimney effect, eliminating the need to add a fan to solve the heat dissipation problem, reducing the space occupied by the fan, and avoiding the problems of short mechanical life and difficult maintenance caused by using a fan for heat dissipation, thus reducing the maintenance cost of the energy storage converter step-up unit.

[0036] In some embodiments, refer to Figure 2 The combined transformer 100 includes an oil tank 110, a high-voltage compartment 120, and a heat sink 130. The high-voltage compartment 120 and the heat sink 130 are respectively located on the front and rear sides of the oil tank 110. A set of low-voltage outgoing bushings 140 are respectively provided on the left and right sides of the oil tank 110. The low-voltage outgoing bushings 140 are conductively connected to the upper end of the busbar 340 as low-voltage outgoing components.

[0037] Understandably, the heat sink 130 can improve the heat dissipation performance of the combined transformer 100 and avoid the problem of overheating of the combined transformer 100. Moreover, the low-voltage outgoing bushings 140 are set on the left and right sides of the oil tank 110, and the problem of outgoing lines on both sides of the dual-winding transformer is solved by the scheme of current convergence inside the oil tank 110.

[0038] In this embodiment, the oil tank 110 has an IP68 protection rating, and the busbar bridge 300 has an IP54 connection protection rating, which meets the requirements for outdoor installation.

[0039] In traditional transformer layouts, to facilitate the installation and maintenance of the transformer and PCS, a large operating space is often required between the transformer and the PCS, typically above 800 mm.

[0040] In this embodiment, two low-voltage outgoing bushings 140 are located on the upper part of the oil tank 110, and a top cover is provided on the top of the oil tank 110, which can open or close the inner cavity of the oil tank 110. This arrangement helps to reduce the size of the oil tank 110. When installing internal components of the oil tank 110 and connecting low-voltage leads, the top of the inner cavity of the oil tank 110 can be opened through the top cover, eliminating the need for a separate installation and operation hole and avoiding the risk of oil leakage. In addition, since operators can perform wiring operations on the low-voltage outgoing bushings 140 located on the upper part of the oil tank 110 by opening the top cover of the oil tank 110, the energy storage converter 200 and the combined transformer 100 do not need to reserve a large operating space, reducing the arrangement distance between the energy storage converter 200 and the combined transformer 100, thereby reducing the space occupied by the entire energy storage converter and step-up unit and improving space utilization.

[0041] In some embodiments, an instrument box 150 is provided on the front side of the oil tank 110. The instrument box 150 is equipped with components such as a pressure gauge, an oil level gauge, and an oil temperature probe. Operators can obtain information such as the pressure, oil level, and oil temperature inside the oil tank 110 through the instrument box 150. Components such as a pressure relief valve, a load switch, and a tap changer are also provided on the instrument box 150, which can control the pressure, circuit, and output voltage inside the oil tank 110.

[0042] In some embodiments, refer to Figure 3 and Figure 4 The width of the vertical section 330 of the bridge body gradually increases from bottom to top along the front-to-back direction. This design helps hot air to diffuse at the upper end of the vertical section 330 and facilitates the rapid discharge of hot air through the first heat dissipation hole 311 after entering the first connecting section 310, thereby improving the heat dissipation effect.

[0043] In some embodiments, refer to Figure 3 The front side of the vertical section 330 is vertically set, while the rear side of the vertical section 330 is an inclined surface. The rear side of the vertical section 330 is gradually inclined backward from bottom to top, so that the width of the inner cavity of the vertical section 330 gradually increases from bottom to top along the front-back direction.

[0044] In other embodiments, reference is made to Figure 4 The front and rear sides of the vertical section 330 are inclined surfaces with different slopes. Both the front and rear sides of the vertical section 330 are gradually inclined backward from bottom to top. The angle between the front side of the vertical section 330 and the horizontal plane is greater than the angle between the rear side of the vertical section 330 and the horizontal plane. This makes the width of the inner cavity of the vertical section 330 gradually increase from bottom to top in the front-back direction, and adapts to the arrangement of the bus bridge 300 and other components.

[0045] In some embodiments, the first heat dissipation hole 311 is provided on the front and rear walls of the first connecting section 310, so that both the front and rear walls of the first connecting section 310 can effectively dissipate heat, further improving the heat dissipation effect of the bus bridge 300 and avoiding overheating.

[0046] In some embodiments, the second connecting section 320 is provided with a second heat dissipation hole 321, which is located on the front or rear wall surface of the second connecting section 320. By providing the second heat dissipation hole 321, heat dissipation can be achieved at the lower end of the bridge body, and natural convection can be better formed inside the bridge body, further improving the heat dissipation effect of the bus bridge 300.

[0047] It is understandable that the number and diameter of the first heat dissipation hole 311 and the second heat dissipation hole 321 are set according to the actual heat generation and protection level requirements.

[0048] In some embodiments, the vertical section 330 includes a mounting body and a side cover, the side cover being detachably connected to the left or right end of the mounting body. It is understood that the mounting body and the side cover together surround an inner cavity forming the vertical section 330, within which the busbar 340 extends. By opening the side cover, it is convenient for operators to perform maintenance operations on the busbar 340.

[0049] In some embodiments, the side cover and the mounting body are detachably connected by screws or other connectors, and a handle 331 is provided on the outside of the side cover to facilitate the disassembly and assembly of the side cover.

[0050] In some embodiments, the integrated energy storage converter and step-up unit also includes a container 400, which can centrally install the combined transformer 100, the energy storage converter 200 and the bus bridge 300. This facilitates the overall layout and transportation of the integrated energy storage converter and step-up unit, and allows for standardized installation dimensions, which is beneficial for reserving installation space and on-site installation.

[0051] In this embodiment, refer to Figure 5 The container 400 includes an integrated frame 410 and two partition plates 420. The partition plates 420 are vertically arranged and connected to the integrated frame 410. The partition plates 420 can divide the inner cavity of the integrated frame 410 into three mounting cavities, namely a first mounting cavity 421 and two second mounting cavities 422. The two second mounting cavities 422 are respectively located on the left and right sides of the first mounting cavity 421. The first mounting cavity 421 is used to place the combined transformer 100, and the two second mounting cavities 422 are used to place the energy storage converter 200. Preferably, a support base 450 is provided at the lower end of the second mounting cavity 422. The bottom surface of the energy storage converter 200 is connected to the support base 450 and forms a wiring space 451 with the bottom surface of the second mounting cavity 422. That is, the energy storage converter 200 is raised by the support base 450 and placed in the second mounting cavity 422 to facilitate the outgoing wiring of the bottom surface of the energy storage converter 200 and its connection with the bus bridge 300.

[0052] In this embodiment, to facilitate the arrangement of the busbar bridge 300, a cable passage 423 is provided at the lower end of the partition plate 420, allowing the lower ends of the first mounting cavity 421 and the second mounting cavity 422 to communicate with each other. The first connecting section 310 and the vertical section 330 of the busbar bridge 300 are disposed in the first mounting cavity 421, while the second connecting section 320 passes through the cable passage 423 and extends into the cable passage space 451 below the energy storage converter 200. The upper end face of the second connecting section 320 is connected to the bottom of the energy storage converter 200.

[0053] In some embodiments, the container 400 further includes two equipment doors 430, which are located on the front and rear sides of the first mounting cavity 421, respectively, and are movably connected to the integrated frame 410. The equipment doors 430 can open or close the first mounting cavity 421, protect the combined transformer 100, and facilitate the operator to perform maintenance operations on the combined transformer 100.

[0054] In this embodiment, the device door 430 is provided with a third heat dissipation hole 431, which is connected to the first mounting cavity 421, so that the hot air discharged from the first heat dissipation hole 311 can be smoothly discharged from the first mounting cavity 421, effectively solving the heat dissipation problem in the first mounting cavity 421.

[0055] In some embodiments, the container 400 further includes a top cover 440, which covers the first mounting cavity 421 and is detachably connected to the upper end of the integrated frame 410. It is understood that the top cover 440 can be detachably connected to the integrated frame 410 via screws or other connectors. Removing the top cover 440 allows operators to easily open the top cover of the fuel tank 110 for maintenance of the internal components.

[0056] In some embodiments, a fourth heat dissipation hole 441 is provided on the top cover 440, and the fourth heat dissipation hole 441 is connected to the first mounting cavity 421, which can further improve the heat dissipation efficiency of the first mounting cavity 421.

[0057] In some embodiments, a fifth heat dissipation hole 452 is provided on the side wall of the support base 450 for raising the energy storage converter 200. The fifth heat dissipation hole 452 is connected to the wiring space 451. The hot air discharged through the second heat dissipation hole 321 can be smoothly discharged through the fifth heat dissipation hole 452 to the wiring space 451, effectively solving the heat dissipation problem in the second mounting cavity 422.

[0058] It is understood that the number, size, and shape of the third heat dissipation hole 431, the fourth heat dissipation hole 441, and the fifth heat dissipation hole 452 are not specifically limited here.

[0059] In this embodiment, the container 400 has a length of 6058mm, a width of 2438mm, and a height of 2896mm. It is understood that the dimensions of the container 400 can be designed according to actual circumstances, and are not specifically limited here.

[0060] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An integrated energy storage, converter, and boost converter, characterized in that, include: Combined transformer; Two energy storage converters are respectively located on the left and right sides of the combined transformer; Two busbar bridges are respectively located on the left and right sides of the combined transformer. Each busbar bridge includes a bridge body and a busbar. The bridge body includes a first connecting section, a second connecting section, and a vertical section. The vertical section is located between the energy storage converter and the combined transformer. The first connecting section is located at the upper end of the vertical section and is connected to the combined transformer. The side wall of the first connecting section is provided with a first heat dissipation hole, which communicates with the inner cavity of the first connecting section. The second connecting section is located at the lower end of the vertical section and is connected to the energy storage converter. The busbar is located inside the bridge body and arranged along the direction of the bridge body. The two ends of the busbar are electrically connected to the combined transformer and the energy storage converter, respectively.

2. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The combined transformer includes an oil tank, a high-voltage compartment, and a heat sink. The high-voltage compartment and the heat sink are respectively located on the front and rear sides of the oil tank. A set of low-voltage outgoing bushings is provided on the left and right sides of the oil tank, and the two sets of low-voltage outgoing bushings are respectively connected to the upper end of the busbar.

3. The integrated energy storage converter and boost converter according to claim 2, characterized in that, The low-voltage outlet bushing is located at the top of the oil tank, and the top of the oil tank is provided with a top cover, which is used to open or close the inner cavity of the oil tank.

4. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The width of the vertical section gradually increases from bottom to top along the front-to-back direction.

5. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The first heat dissipation hole is located on the front and rear wall surfaces of the first connecting section.

6. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The second connecting section is provided with a second heat dissipation hole, which is located on the front or rear wall surface of the second connecting section.

7. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The vertical section includes a mounting body and a side cover, the side cover being detachably connected to the left or right end of the mounting body.

8. The integrated energy storage converter and boost converter according to claim 1, characterized in that, The integrated energy storage converter and boost converter also includes: The container includes an integrated frame and two partitions. The partitions are connected to the integrated frame and divide the inner cavity of the integrated frame into a first mounting cavity and two second mounting cavities. The two second mounting cavities are located on the left and right sides of the first mounting cavity, respectively. The lower end of the partition is provided with a cable passage to allow the lower ends of the first mounting cavity and the second mounting cavities to communicate with each other. The combined transformer is located in the first mounting cavity, and the two energy storage converters are located in the two second mounting cavities, respectively. The lower end of the second mounting cavity is provided with a support base. The bottom surface of the energy storage converter is connected to the support base and forms a cable passage space with the bottom surface of the second mounting cavity. The first connecting section and the vertical section are located in the first mounting cavity. The second connecting section passes through the cable passage and extends into the cable passage space. The upper end surface of the second connecting section is connected to the bottom of the energy storage converter.

9. The integrated energy storage converter and boost converter according to claim 8, characterized in that, The container also includes two equipment doors, which are located on the front and rear sides of the first mounting cavity and are movably connected to the integrated frame to open or close the first mounting cavity. The equipment doors are provided with a third heat dissipation hole, which communicates with the first mounting cavity.

10. The integrated energy storage converter and boost converter according to claim 8, characterized in that, The container also includes a top cover that covers the first mounting cavity and is detachably connected to the upper end of the integrated frame. The top cover is provided with a fourth heat dissipation hole that communicates with the first mounting cavity.

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