Machine side converter of flywheel energy storage system

Abstract

The utility model discloses a machine side converter of a flywheel energy storage system, which comprises at least one converter main body arranged in parallel, and two adjacent converter main bodies are connected through a busbar. The converter main body comprises a cabinet body, a power unit and a controller connected with the power unit are installed in the cabinet body, a fuse which is located above the power unit and connected with the power unit is installed in the cabinet body, and a heating unit and an inductance unit which are located below the power unit are installed in the cabinet body; a control unit located on the front side of the heating unit is arranged in the cabinet body. A heat dissipation unit extending out of the cabinet body is arranged at the top of the cabinet body; a front cabinet door is mounted on the front side of the cabinet body, a rear cabinet door is mounted on the rear side of the cabinet body, and air inlet meshes are formed in the front cabinet door and the rear cabinet door; the machine-side converter is designed in a split mode, is convenient to transport and is suitable for being combined for use according to different transduction requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel energy storage systems, in particular to a machine-side converter of a flywheel energy storage system. Background Art

[0002] The flywheel energy storage system is an efficient and reliable energy storage and release technology that uses a converter (also called a bidirectional converter) to achieve rapid conversion between electrical energy and mechanical kinetic energy. It generally has a grid-side converter connected to the power grid and a machine-side converter connected to the flywheel energy storage device. Different energy conversion requirements require different capacity and quantity of converters. Converters designed directly according to energy conversion requirements are large in size and inconvenient to transport. Utility Model Content

[0003] The purpose of the utility model is to provide a machine-side converter for a flywheel energy storage system, which solves the problem of a split design of the machine-side converter, facilitates transportation and is adaptable to combined use for different energy conversion requirements.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A machine-side converter for a flywheel energy storage system comprises at least one converter body arranged in parallel, with two adjacent converter bodies connected via a bus; the converter body comprises a cabinet, a power unit and a controller connected to the power unit are installed in the cabinet, a fuse located above and connected to the power unit is installed in the cabinet, a heating unit and an inductance unit are installed below the power unit; a control unit is provided in the cabinet in front of the heating unit; a heat dissipation unit extending out of the cabinet is provided on the top of the cabinet; a front cabinet door is installed on the front side of the cabinet, and a rear cabinet door is installed on the rear side of the cabinet, and both the front cabinet door and the rear cabinet door are provided with air inlet meshes.

[0006] Preferably, a fixing plate supporting the power unit is provided in the cabinet.

[0007] Preferably, a bracket for mounting the fuse is provided in the cabinet, and a DC protection plate for shielding the fuse is further provided on the cabinet, wherein mesh holes are provided on the DC protection plate.

[0008] Preferably, a support base for mounting the inductor unit is provided in the cabinet, and an AC protection plate for shielding the inductor unit is further provided on the cabinet, wherein mesh holes are provided on the AC protection plate.

[0009] Preferably, a mounting plate for mounting the control unit is provided on the cabinet, and mesh holes are formed on the mounting plate.

[0010] Preferably, side panels are installed on the cabinet bodies, and when the two cabinet bodies are connected as one, the side panels on the connection side are detachable.

[0011] Preferably, the top of the cabinet is provided with hanging beams located on both sides of the heat dissipation unit.

[0012] Preferably, a base is provided at the bottom of the cabinet.

[0013] Preferably, the front cabinet door and the rear cabinet door are both rotatably mounted on the cabinet body, a door lock is provided between the front cabinet door and the cabinet body, and a lock buckle for locking the rear cabinet door is provided in the cabinet body.

[0014] Preferably, the front cabinet door and the rear cabinet door are both installed with a filter assembly located on one side of the air inlet mesh, and the filter assembly includes dust-proof cotton, a steel mesh, and a dust-proof cover plate that are stacked in sequence.

[0015] Beneficial effects:

[0016] By using multiple converter bodies as separate structures with independent functions, they can be connected via a bus at the installation site according to usage requirements, making it easy to transport and carry each converter body separately, and reducing the size;

[0017] Specifically, each converter body has complete functions. The power unit, controller, fuse, heating unit, inductor unit, control unit and heat dissipation unit are integrated through the cabinet. Internal heat dissipation is achieved through the heat dissipation unit. The heat dissipation air flows into the interior through the air inlet mesh to form a heat dissipation wind flowing from the bottom to the top, thereby improving the heat dissipation effect and avoiding thermal coupling. The internal unit devices are arranged longitudinally along the heat dissipation air duct to effectively control the volume occupied by the internal layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view structural diagram of the inverter main body array connection according to an embodiment of the present utility model;

[0019] Figure 2 Schematic diagram of the rear view structure of the inverter main body array connection of the embodiment of the utility model

[0020] Figure 3 This is a structural diagram of the converter body of the embodiment of the utility model without the front cabinet door;

[0021] Figure 4 This is a structural diagram of the converter body of the embodiment of the utility model without the rear cabinet door;

[0022] Figure 5 This is a structural diagram of the converter body of the embodiment of the utility model without the DC protection plate and the AC protection plate;

[0023] Figure 6 for Figure 5 A schematic diagram of a first-person perspective stereoscopic structure;

[0024] Figure 7 for Figure 5 A schematic diagram of a second perspective stereoscopic structure;

[0025] Figure 8 This is a schematic structural diagram of the filter assembly in an embodiment of the present utility model;

[0026] exist Figures 1 to 8 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0027] Inverter body 1, busbar 2, cabinet 3, power unit 4, controller 5, fuse 6, heating unit 7, inductor unit 8, control unit 9, heat dissipation unit 10, front cabinet door 11, rear cabinet door 12, air inlet mesh 13, fixing plate 14, bracket 15, DC protection plate 16, support base 17, AC protection plate 18, mounting plate 19, side panel 20, lifting beam 21, base 22, filter assembly 23, dustproof cotton 231, wire mesh 232, dustproof cover 233. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figures 1-8 As shown, in an embodiment of the present invention, a machine-side converter of a flywheel energy storage system is proposed, comprising at least one converter body 1 arranged in parallel, two adjacent converter bodies 1 being connected via a bus 2. Based on the number of converter bodies 1 required for actual use, the two adjacent converter bodies 1 are connected and conducted via the bus 2, thereby facilitating on-site connection in actual use, thereby facilitating small-volume control of the converter body 1 and facilitating transportation and handling. At the same time, it is also possible to reduce the minimum unitization of the converter body 1 that can be used independently, and flexibly combine them according to use requirements.

[0030] Each converter body 1 is a functionally independent and complete unit. Specifically, the converter body 1 includes a cabinet 3, in which a power unit 4 and a controller 5 connected to the power unit 4 are installed. A fuse 6 located above and connected to the power unit 4 is installed in the cabinet 3. A heating unit 7 and an inductance unit 8 located below the power unit 4 are installed in the cabinet 3. At the same time, a control unit 9 located in front of the heating unit 7 is provided in the cabinet 3, and a heat dissipation unit 10 extending out of the cabinet 3 is provided on the top of the cabinet 3. The constituent units are mainly arranged in a position inside the cabinet 3 to reduce the internal volume occupied by the cabinet 3, and the above-mentioned units are arranged along the flow direction of the heat dissipation air. On the one hand, it can accelerate the heat dissipation effect, and on the other hand, it can avoid the phenomenon of thermal coupling.

[0031] Specifically, a front cabinet door 11 is installed on the front side of the cabinet body 3, and a rear cabinet door 12 is installed on the rear side of the cabinet body 3. Both the front cabinet door 11 and the rear cabinet door 12 are provided with air inlet meshes 13. After the external cold air enters through the air inlet meshes 13 on both sides, it passes through the back heat dissipation units 10 of each unit in turn and dissipates outwards, thereby improving the heat dissipation effect.

[0032] Specifically, in order to stably support and fix the power unit 4 , a fixing piece 14 for supporting the power unit 4 is provided in the cabinet 3 , and is respectively fixed at each edge position of the power unit 4 .

[0033] At the same time, a bracket 15 for installing the fuse 6 is provided in the cabinet 3. A DC protection plate 16 for covering the fuse 6 is also provided on the cabinet 3. A mesh is provided on the DC protection plate 16. The fuse 6 is installed through the bracket 15, and isolation protection is achieved at this position by the DC protection plate to avoid the risk of contact with internal conductive materials. At the same time, the mesh setting ensures the heat dissipation effect at this position.

[0034] Specifically, a support base 17 for installing the inductance unit 8 is provided in the cabinet 3, and an AC protection plate 18 for covering the inductance unit 8 is also provided on the cabinet 3. The AC protection plate 18 is provided with mesh holes. Similarly, the inductance unit 8 is supported and fixed by the support base 17, and the AC protection plate 18 isolates the eating part to avoid the risk of contact with missiles, and ensures the heat dissipation effect through the mesh holes.

[0035] At the same time, a mounting plate 19 for mounting the control unit 9 is provided on the cabinet 3 , and mesh holes are provided on the mounting plate 19 . The control unit 9 is located on one side of the heating unit 7 , and isolation is achieved through the mounting plate 19 and the mesh holes are used to ensure heat dissipation.

[0036] Each independent converter body 1 has side panels 20 mounted on the cabinet 3. When two cabinets 3 are connected, the connecting side panels 20 are removable, facilitating direct connection of the two converter bodies 1 through the cabinets 3 and internal series connection of the busbars 2. Depending on the actual use scenario, it is also possible to retain only the outermost side panels 20 of multiple connected converter bodies 1, while removing the entire central portion.

[0037] In order to facilitate lifting and bearing the entire cabinet 3 , lifting beams are installed at intervals on both sides of the heat dissipation unit 10 on the top of the cabinet 3 , and load-bearing lifting is achieved through the lifting beams 21 .

[0038] At the same time, a base 22 is provided at the bottom of the cabinet 3 , which supports the cabinet 3 and facilitates overall lifting by a forklift.

[0039] Specifically, in order to facilitate opening and closing of the front cabinet door 11 and the rear cabinet door 12, the front cabinet door 11 and the rear cabinet door 12 are rotatably installed on the cabinet body 3, a door lock is provided between the front cabinet door 11 and the cabinet body 3, and a lock is provided in the cabinet body 3 to lock the rear cabinet door 12.

[0040] At the same time, a handle is installed on the rear cabinet door 12, which makes it easy to open the lock from the inside and then pull open the rear cabinet door 12 from the outside. By making it possible to open both the rear cabinet door 12 and the front cabinet door 11, it is convenient to assemble the internal units on the front and rear sides of the cabinet body 3.

[0041] Specifically, the cold air entering from the outside enters through the air inlet mesh 13 on the front cabinet door 11 and the rear cabinet door 12, and may contain impurities, so air filtration is required. A filter component 23 is installed on the front cabinet door 11 and the rear cabinet door 12, located on one side of the air inlet mesh 13. The filter component 23 includes dust-proof cotton 231 (a flame retardant material with a filtration particle size of 30PPI), a wire mesh 232 (8 mesh), and a dust-proof cover 233 (with a through hole larger than the wire mesh 232) that are stacked in sequence. The filter component 23 is fastened to the front cabinet door 11 or the rear cabinet door 12 through the dust-proof cover 233, pressing the wire mesh 232 and the dust-proof cotton 231 to filter the incoming air and prevent dust from entering the interior and causing pollution.

[0042] By arranging the positions of the various units inside the cabinet 3 and ensuring the heat dissipation and ventilation effect at each position, the heat dissipation effect can be ensured while reducing the volume.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A machine-side converter for a flywheel energy storage system, characterized in that: It comprises at least one converter body (1) arranged in parallel, and two adjacent converter bodies (1) are connected via a busbar (2); The converter body (1) comprises a cabinet (3), a power unit (4) and a controller (5) connected to the power unit (4) are installed in the cabinet (3), a fuse (6) located above the power unit (4) and connected to the power unit (4) is installed in the cabinet (3), and a heating unit (7) and an inductor unit (8) are installed in the cabinet (3) and located below the power unit (4); A control unit (9) is provided in the cabinet (3) and is located in front of the heating unit (7); A heat dissipation unit (10) extending out of the cabinet (3) is provided on the top of the cabinet (3); A front cabinet door (11) is installed on the front side of the cabinet body (3), and a rear cabinet door (12) is installed on the rear side of the cabinet body (3). Both the front cabinet door (11) and the rear cabinet door (12) are provided with air inlet mesh holes (13).

2. The machine-side converter of a flywheel energy storage system according to claim 1, characterized in that: A bracket (15) for mounting the fuse (6) is provided in the cabinet (3), and a DC protection plate (16) for shielding the fuse (6) is also provided on the cabinet (3), wherein mesh holes are provided on the DC protection plate (16).

3. The machine-side converter of a flywheel energy storage system according to claim 1, characterized in that: A support base (17) for mounting the inductance unit (8) is provided in the cabinet (3), and an AC protection plate (18) for shielding the inductance unit (8) is also provided on the cabinet (3), wherein mesh holes are provided on the AC protection plate (18).

4. The machine-side converter of a flywheel energy storage system according to claim 1, characterized in that: The cabinet (3) is provided with a mounting plate (19) for mounting the control unit (9), and mesh holes are provided on the mounting plate (19).

5. The machine-side converter of a flywheel energy storage system according to any one of claims 1 to 4, characterized in that: A side panel (20) is installed on the cabinet body (3); when the two cabinet bodies (3) are connected as one, the side panel (20) on the connection side is detachable.

6. The machine-side converter of a flywheel energy storage system according to claim 5, characterized in that: The top of the cabinet (3) is spaced apart with hanging beams located on both sides of the heat dissipation unit (10).

7. The machine-side converter of a flywheel energy storage system according to claim 5, characterized in that: A base (22) is provided at the bottom of the cabinet (3).

8. The machine-side converter of a flywheel energy storage system according to claim 1, characterized in that: The front cabinet door (11) and the rear cabinet door (12) are both rotatably mounted on the cabinet body (3), a door lock is provided between the front cabinet door (11) and the cabinet body (3), and a lock for locking the rear cabinet door (12) is provided in the cabinet body (3).

9. The machine-side converter of a flywheel energy storage system according to claim 8, characterized in that: The front cabinet door (11) and the rear cabinet door (12) are both provided with a filter assembly (23) located on one side of the air inlet mesh hole (13), and the filter assembly (23) comprises dustproof cotton (231), a steel mesh (232), and a dustproof cover plate (233) which are sequentially stacked.

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