A capacitive system

Abstract

The present invention provides a capacitance system, comprising: a plurality of capacitance-increasing capacitor modules configured to provide at least one capacitance; a plurality of main capacitor modules configured to be arranged on a first side of a rack perpendicular to the depth direction of the rack by connecting with the capacitance-increasing capacitor modules; and a rack configured to accommodate the capacitance-increasing capacitor modules and the main capacitor modules, wherein the capacitance-increasing capacitor modules and / or the rack are constructed to be movable within the rack to access or disconnect one or more of the plurality of capacitance-increasing capacitor modules.

Description

Technical Field

[0001] The present invention relates to the field of new energy technologies, and particularly to a capacitor system. Background Art

[0002] In recent years, in the application field of industrial converters, especially in the capacitor assembly structure of high-power AC-DC conversion modules, a modular design principle is adopted to achieve the purposes of rapid installation, easy maintenance, and reliable strength. Most of the current capacitor structures are integral, with a relatively large overall weight, which requires additional tooling for maintenance and handling; a few are split capacitor components, which occupy a large space and require additional assembly space for interfaces. In some spaces with compact dimensions in terms of equipment height and depth, the overall structure design of the capacitor becomes increasingly important. It is necessary not only to achieve a compact structure but also to facilitate installation. Therefore, the reasonable layout of the capacitor plays a crucial role in the layout of the entire device and the function of the capacitor.

[0003] In the prior art, during the design of the laminated busbar of a three-level capacitor module, generally all three layers are overlapped, which is not good for weight, cost, and performance. Summary of the Invention

[0004] The purpose of the present invention is to provide a capacitor system to solve the problem that the existing capacitor installation structure layout and laminated row structure design cannot simultaneously achieve convenient installation and maintenance, excellent performance, and low cost.

[0005] To solve the above technical problems, the present invention provides a capacitor system, including:

[0006] A plurality of capacitance-increasing capacitor modules configured to provide at least one capacitor;

[0007] A plurality of main capacitor modules configured to be arranged on a first side surface of the rack perpendicular to the depth direction of the rack by connecting with the capacitance-increasing capacitor modules; and

[0008] A rack configured to accommodate the capacitance-increasing capacitor modules and the main capacitor modules, wherein the capacitance-increasing capacitor modules and / or the rack are constructed to be movable within the rack to connect or disconnect one or more of the plurality of capacitance-increasing capacitor modules.

[0009] Optionally, in the capacitor system, the capacitance-increasing capacitor module includes:

[0010] A mounting and fixing surface configured to be connected to the rack;

[0011] A capacitor configured to be fixed between the mounting and fixing surface and the laminated busbar; and

[0012] The laminated busbar is configured to provide electrical and mechanical interfaces for the capacitor. The electrical interface is directly connected and fixed to the capacitor, and the mechanical interface is connected and fixed to the insulator of the capacitor;

[0013] The electrical interface and the mechanical interface are electrically insulated from each other and are arranged at a distance.

[0014] Optionally, in the capacitor system, the main capacitor module includes:

[0015] It is configured to be arranged on the first side of the rack by connecting with the capacitance increasing capacitor module, and the first side is perpendicular to the depth direction of the rack.

[0016] The first electrical interface is configured to be connected to the capacitance increasing module;

[0017] The second electrical interface is configured to be connected to an external module;

[0018] Optionally, in the capacitor system, there are guide rails extending along the depth direction of the rack on the rack, where:

[0019] The mounting and fixing surface can slide along the guide rail; the guide rail limits the mounting and fixing surface in the length direction and width direction of the rack.

[0020] Optionally, in the capacitor system, the rack further includes at least one cross beam. After the mounting and fixing surface cooperates with the guide rail, the laminated busbar can be connected to the cross beam;

[0021] There are mounting holes on the cross beam, and the mounting holes are in contact with the insulator of the capacitor.

[0022] Optionally, in the capacitor system, after the rack is placed, the laminated busbar faces downward and the mounting and fixing surface faces upward, and the capacitance increasing capacitor module is pushed into the depth direction of the cabinet.

[0023] Optionally, in the capacitor system, the laminated busbar includes:

[0024] The first insulating layer is configured to be located on the outermost side of the capacitance increasing capacitor module;

[0025] The first conductive layer is configured to be stacked on the first insulating layer;

[0026] The second insulating layer is configured to be stacked on the first conductive layer;

[0027] The second conductive layer is configured to be stacked on one side plane of the second insulating layer;

[0028] The third conductive layer is configured to be stacked on the other side plane of the second insulating layer;

[0029] A third insulating layer, configured to be stacked on the second conductive layer; and

[0030] A fourth insulating layer, configured to be stacked on the third conductive layer.

[0031] Optionally, in the capacitor system, there are multiple layers in the rack, and each layer is configured with a set of guide rails and crossbeams for the installation of the capacitive module for capacity expansion of that layer;

[0032] The capacitive module for capacity expansion slides to its nominal position on its layer so that the first electrical interface of the capacitive module for capacity expansion can be connected to the electrical interface of the rack;

[0033] When the connection point between the main capacitive module and the capacitive module for capacity expansion is directly behind the capacitive module for capacity expansion, the capacitors are arranged such that the gap between the capacitors allows the first electrical interface to be seen;

[0034] When the connection point between the main capacitive module and the capacitive module for capacity expansion is directly below the capacitive module for capacity expansion, there is no requirement for the arrangement of the capacitors.

[0035] Optionally, in the capacitor system, the same side edges of the first insulating layer, the second insulating layer, the third insulating layer, the fourth insulating layer, the first conductive layer, the second conductive layer, and the third conductive layer all have plate-shaped protrusion structures;

[0036] The plate-shaped protrusion structure of the first conductive layer is clamped between the plate-shaped protrusion structures of the high plate between the first insulating layer and the second insulating layer;

[0037] The plate-shaped protrusion structure of the second conductive layer is clamped between the plate-shaped protrusion structures of the low plate between the second insulating layer and the third insulating layer;

[0038] The plate-shaped protrusion structure of the third conductive layer is clamped between the plate-shaped protrusion structures of the low plate between the second insulating layer and the third insulating layer;

[0039] The plate-shaped protrusion structures of the first insulating layer, the second insulating layer, the third insulating layer, and the fourth insulating layer have avoidance holes;

[0040] The plate-shaped protrusion structures of the first conductive layer, the second conductive layer, and the third conductive layer have conductive connection holes as the first electrical interface.

[0041] Optionally, in the capacitor system, the first conductive layer is connected to the zero pole, and the second conductive layer and the third conductive layer are respectively connected to the positive pole and the negative pole;

[0042] On the first conductive layer, the second conductive layer, and the third conductive layer, there are capacitor connection holes and avoidance holes;

[0043] The capacitor connection holes are distributed below the capacitors of the same polarity as the second electrical interface; the avoidance holes are distributed below the capacitors of different polarities.

[0044] Optionally, in the capacitor system described above, the side of the mounting and fixing surface is provided with a handle.

[0045] In the capacitor system provided by the present invention, the capacitive boosting module is configured to be slidable within the rack to connect or disconnect one or more capacitive boosting modules. At the same time, it realizes a series of advantages such as modular production, easy installation, separation of mechanical connection and electrical connection, and ensures installation reliability. It provides a capacitive installation structure layout and stacked row structure design that is convenient for installation and maintenance, has excellent performance, and low cost. Description of the Drawings

[0046] Figure 1 is a schematic diagram of the capacitor system in an embodiment of the present invention;

[0047] Figure 2 is a schematic diagram of the capacitive boosting module in the capacitor system in an embodiment of the present invention;

[0048] Figure 3 is a schematic diagram of each layer of the rack in the capacitor system in an embodiment of the present invention;

[0049] Figure 4 is a schematic diagram of the assembly of the capacitive boosting module and the rack in the capacitor system in an embodiment of the present invention;

[0050] Figure 5 is a schematic diagram of the stacked busbar in the capacitor system in an embodiment of the present invention;

[0051] Figure 6 is a schematic diagram of the connection between the capacitive boosting module and the main capacitor module in the capacitor system in an embodiment of the present invention;

[0052] As shown in the figure: 1 - rack; 2 - guide rail; 3 - cross beam; 4 - stacked busbar; 5 - mounting and fixing surface; 6 - capacitor; 7 - handle; 8 - insulator of the capacitor; 11 - capacitive boosting module; 12 - main capacitor module; 13 - first electrical interface. Detailed Embodiments

[0053] The present invention will be further described below in conjunction with the detailed embodiments with reference to the drawings.

[0054] It should be noted that the components in each drawing may be exaggerated for illustration purposes and are not necessarily to scale. In each drawing, the same or functionally identical components are provided with the same reference numerals.

[0055] In the present invention, unless otherwise specified, the expressions "arranged on", "arranged above", and "arranged over" do not exclude the presence of intermediate elements therebetween. In addition, "arranged on or above" only represents the relative positional relationship between two components, and in certain situations, such as after reversing the product direction, it can also be converted to "arranged under or below", and vice versa.

[0056] In the present invention, each embodiment is only intended to illustrate the solution of the present invention and should not be construed as restrictive.

[0057] In the present invention, unless otherwise specified, the quantifiers "a" and "one" do not exclude the scenario of multiple elements.

[0058] It should also be noted here that in the embodiments of the present invention, for the sake of clarity and simplicity, only a part of the components or assemblies may be shown. However, those of ordinary skill in the art can understand that, under the teaching of the present invention, the required components or assemblies can be added according to the specific scenario requirements. Additionally, unless otherwise stated, the features in different embodiments of the present invention can be combined with each other. For example, a certain feature in the second embodiment can be used to replace the corresponding or functionally identical or similar feature in the first embodiment, and the resulting embodiment also falls within the scope of disclosure or the scope of recording of the present application.

[0059] It should also be noted here that within the scope of the present invention, the terms "identical", "equal", "equal to", etc. do not mean that the two numerical values are absolutely equal, but allow a certain reasonable error, that is, the said terms also cover "substantially identical", "substantially equal", "substantially equal to". By analogy, in the present invention, the directional terms "perpendicular to", "parallel to", etc. also cover the meanings of "substantially perpendicular to" and "substantially parallel to".

[0060] In addition, the numbering of the steps of each method of the present invention does not limit the execution order of the method steps. Unless otherwise specified, the method steps can be executed in different orders.

[0061] The following further elaborates on the capacitive system proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.

[0062] The object of the present invention is to provide a capacitive system to solve the problem that the existing capacitive installation structure layout and stacked structure design cannot simultaneously achieve convenient installation and maintenance, excellent performance, and low cost.

[0063] To achieve the above object, the present invention provides a capacitance system, comprising: a plurality of capacitance increasing modules configured to provide at least one capacitance; a plurality of main capacitance modules configured to be arranged on a first side of a rack perpendicular to the depth direction of the rack by connecting with the capacitance increasing modules; and a rack configured to accommodate the capacitance increasing modules and the main capacitance modules, wherein the capacitance increasing modules and / or the rack are constructed to be movable within the rack to connect or disconnect one or more of the plurality of capacitance increasing modules.

[0064] The present invention provides a capacitance system, as Figure 1 shown, comprising: a plurality of capacitance increasing modules 11 configured to provide at least one capacitance 6; a plurality of main capacitance modules 12 configured to be arranged on a first side of a rack 1 perpendicular to the depth direction of the rack by connecting with the capacitance increasing modules 11; and a rack 1 configured to accommodate the capacitance increasing modules 11 and the main capacitance modules 12, wherein the capacitance increasing modules 11 are constructed to be slidable within the rack 1 to connect or disconnect one or more capacitance increasing modules.

[0065] In an embodiment of the present invention, in the capacitance system, as Figure 2 shown, the capacitance increasing module comprises: a mounting and fixing surface 5 configured to connect with the rack 1; a capacitance 6 configured to be fixed between the mounting and fixing surface 5 and a stacked busbar 4; and a stacked busbar 4 configured to provide an electrical interface and a mechanical interface for the capacitance 6, the electrical interface being directly connected and fixed to the capacitance 6, and the mechanical interface being connected and fixed to an insulator 8 of the capacitance 6; the electrical interface and the mechanical interface are electrically insulated from each other and have a distance in the arrangement position.

[0066] The main capacitance module 12 is configured to be arranged on a first side of the rack perpendicular to the depth direction of the rack by connecting with the capacitance increasing module 11; a first electrical interface 13 configured to connect with the increasing module; a second electrical interface 14 configured to connect with an external module.

[0067] In an embodiment of the present invention, in the capacitance system, as Figure 3 shown, the rack 1 has a guide rail 2 extending along the depth direction of the rack 1, wherein: the mounting and fixing surface 5 can slide along the guide rail 2; the guide rail 2 limits the mounting and fixing surface 5 in the length direction and the width direction of the rack 1.

[0068] In an embodiment of the present invention, in the capacitance system, the rack 1 further comprises at least one cross beam 3, and when the mounting and fixing surface 5 cooperates with the guide rail 2, the stacked busbar 4 can be connected with the cross beam 3; the cross beam 3 has mounting holes, and the mounting holes are in contact with the insulators 8 of the capacitances 6.

[0069] In one embodiment of the present invention, in the capacitance system, as Figure 4 shown, after the rack 1 is placed, the laminated busbar 4 faces downward and the installation fixing surface 5 faces upward, and the capacitance increasing module is pushed into the cabinet depth direction.

[0070] In one embodiment of the present invention, in the capacitance system, as Figure 5 shown, the laminated busbar 4 includes: a first insulating layer 41 configured to be located on the outermost side of the capacitance increasing module; a first conductive layer 42 configured to be stacked on the first insulating layer 41; a second insulating layer 43 configured to be stacked on the first conductive layer 42; a second conductive layer 44 configured to be stacked on one side plane of the second insulating layer 43; a third conductive layer 45 configured to be stacked on the other side plane of the second insulating layer 43; a third insulating layer 46 configured to be stacked on the second conductive layer 44; and a fourth insulating layer 47 configured to be stacked on the third conductive layer 45.

[0071] In one embodiment of the present invention, as Figure 5 shown, in the capacitance system, the same side edges of the first insulating layer 41, the second insulating layer 43, the third insulating layer 46, the fourth insulating layer 47, the first conductive layer 42, the second conductive layer 44, and the third conductive layer 45 all have plate-shaped protrusion structures 48; the plate-shaped protrusion structure of the first conductive layer is clamped by the plate-shaped protrusion structure of the high plate between the first insulating layer and the second insulating layer; the plate-shaped protrusion structure of the second conductive layer is clamped by the plate-shaped protrusion structure of the low plate between the second insulating layer and the third insulating layer; the plate-shaped protrusion structure of the third conductive layer is clamped by the plate-shaped protrusion structure of the low plate between the second insulating layer and the third insulating layer; the plate-shaped protrusion structures 48 of the first insulating layer 41, the second insulating layer 43, the third insulating layer 46, and the fourth insulating layer 47 have avoidance holes; the plate-shaped protrusion structures 48 of the first conductive layer 42, the second conductive layer 44, and the third conductive layer 45 have conductive connection holes as the first electrical interface 49.

[0072] In one embodiment of the present invention, in the capacitance system, the first conductive layer 42 is connected to the zero pole, and the second conductive layer 44 and the third conductive layer 45 are respectively connected to the positive pole and the negative pole; on the first conductive layer 42, the second conductive layer 44, and the third conductive layer 45, there are capacitance 6 connection holes and avoidance holes; the capacitance 6 connection holes are distributed below the capacitors 6 of the same polarity as the second electrical interface; the avoidance holes are distributed below the capacitors 6 of different polarities.

[0073] In an embodiment of the present invention, in the capacitance system, there are multiple layers in the rack 1, and each layer is configured with a set of guide rails 2 and crossbeams 3 for the installation of the capacitance increasing modules of that layer; the capacitance increasing module slides to its nominal position on its layer so that the first electrical interface 49 of the capacitance increasing module can be connected to the electrical interface of the rack 1; the capacitors 6 are arranged such that the gap between the capacitors 6 allows the first electrical interface 49 to be visible.

[0074] In an embodiment of the present invention, in the capacitance system, the side surface of the installation and fixing surface 5 has a handle 7.

[0075] In the capacitance system provided by the present invention, by constructing the capacitance increasing module to be able to slide within the rack 1 to connect or disconnect one or more capacitance increasing modules, a series of advantages such as modular production, easy installation, separation of mechanical connection and electrical connection, and ensuring installation reliability are achieved, providing a capacitance 6 installation structure layout and stacked arrangement structure design that are convenient for installation and maintenance, have excellent performance, and low cost.

[0076] The present invention is particularly applicable to medium and high power power electronic devices of the same type such as energy storage converters, and in large power station string electrical equipment. On the stacked busbar 4 of the capacitor 6 assembly, there are electrical interfaces and mechanical installation interfaces. The electrical interfaces are directly connected and fixed to the capacitor 6, and the mechanical interfaces are connected and fixed to the insulators; the rack 1 has guide rails 2 in the front-rear direction, which can limit the position left and right; there is a crossbeam 3 on the lower side, with mounting holes on it, which is in surface contact with the insulator of the capacitor 6 assembly; the stacked busbar 4 of the capacitance increasing module faces downwards, and the installation and fixing surface 5 faces upwards, and it is pushed into the depth direction of the cabinet; the capacitance increasing module slides back and forth along the guide rails 2 until the electrical interface at the rear is connected to the internal electrical interface; the gap between the capacitors 6 allows the electrical interface to be visible, for connection to the positive pole, zero pole, and negative pole; half of the capacitance increasing module is connected to positive and zero, and half is connected to zero and negative. Additionally, using this solution on the AC PCS converter solves the problem of insufficient capacitors 6 and does not additionally occupy the operating space.

[0077] Such as Figure 6As shown, in one embodiment provided by the present invention, it also includes a main capacitor module, which is configured to be arranged on the first side of the rack by connecting with the capacity-increasing capacitor module, and the first side is perpendicular to the depth direction of the rack. Wherein, the connection includes but is not limited to electrical connection, mechanical connection, rigid connection, etc. Preferably, the main capacitor module and the capacity-increasing capacitor module are arranged perpendicular to each other, that is, the main capacitor module is parallel to the first side of the rack, and the first side is the plane where the length direction and width direction of the rack are located. The main capacitor module can be hung on the outside of the rack, or it can be close to the wall plate of the second side of the inside of the rack. The second side is the plane where the length direction and width direction of the rack are located and is opposite to the first side. If the first side is on the outside of the rack, the second side can be inside the rack, and vice versa. The above embodiments are all within the protection scope of the present invention.

[0078] By connecting the main capacitor module to the capacity-increasing capacitor module, the capacity expansion of the capacitor system can be achieved; the connecting parts of the two include but are not limited to metal connecting parts, flexible connecting parts, electrical interfaces, busbars, etc. If the main capacitor module is hung on the outside of the rack, it can be connected to the capacity-increasing capacitor module and pushed into the rack at the same time, or the capacity-increasing capacitor module can be pushed into the rack before the capacity expansion installation is carried out. The installation scheme is very flexible; if the main capacitor module is close to the internal wall panel of the rack, the main capacitor module is first connected to the internal wall panel of the rack, and then the capacity-increasing capacitor module is pushed in to connect the two. The above embodiments are all within the protection scope of the present invention.

[0079] In summary, the above embodiments describe in detail different configurations of the capacitor system. Of course, the present invention includes but is not limited to the configurations listed in the above embodiments. Any content that is transformed based on the configurations provided in the above embodiments belongs to the scope of protection of the present invention. Those skilled in the art can draw inferences based on the contents of the above embodiments.

[0080] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0081] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A capacitive system, characterized in that, Comprising: A plurality of capacitance increasing capacitor modules configured to provide at least one capacitor, wherein the capacitance increasing capacitor module includes a stacked busbar, and plate-like protrusion structures are provided on the same side of the first insulating layer, the second insulating layer, the third insulating layer, the fourth insulating layer, the first conductive layer, the second conductive layer, and the third conductive layer of the stacked busbar. The plate-like protrusion structure of the high plate clamps the plate-like protrusion structure of the first conductive layer between the first insulating layer and the second insulating layer. The plate-like protrusion structure of the low plate clamps the plate-like protrusion structure of the second conductive layer between the second insulating layer and the third insulating layer. The plate-like protrusion structure of the low plate clamps the plate-like protrusion structure of the third conductive layer between the second insulating layer and the third insulating layer. The plate-like protrusion structures of the first insulating layer, the second insulating layer, the third insulating layer, and the fourth insulating layer have avoidance holes, and the plate-like protrusion structures of the first conductive layer, the second conductive layer, and the third conductive layer have conductive connection holes as the first electrical interfaces; A plurality of main capacitor modules configured to be arranged on the first side of the rack by connecting with the capacitance increasing capacitor modules, and the first side is perpendicular to the depth direction of the rack; And A rack configured to accommodate the capacitance increasing capacitor modules and the main capacitor modules, wherein the capacitance increasing capacitor modules and / or the rack are configured to be movable within the rack to access or disconnect one or more of the plurality of capacitance increasing capacitor modules; Wherein the capacitance increasing capacitor module includes: A mounting and fixing surface configured to be connected to the rack; A capacitor configured to be fixed between the mounting and fixing surface and the stacked busbar; and A stacked busbar configured to provide electrical and mechanical interfaces for the capacitor, the electrical interface is directly connected and fixed to the capacitor, and the mechanical interface is connected and fixed to the insulator of the capacitor; The electrical interface and the mechanical interface are electrically insulated and have a distance in the arrangement position; Wherein there are guide rails extending along the depth direction of the rack on the rack, and the mounting and fixing surface can slide along the guide rails, and the guide rails limit the mounting and fixing surface in the length direction and the width direction of the rack.

2. The capacitive system according to claim 1, wherein The main capacitor module includes: Configured to be arranged on the first side of the rack by connecting with the capacitance increasing capacitor modules, and the first side is perpendicular to the depth direction of the rack; A first electrical interface configured to be connected to the capacitance increasing module; A second electrical interface configured to be connected to an external module.

3. The capacitive system according to claim 1, wherein The rack further includes at least one cross beam, and when the mounting and fixing surface cooperates with the guide rail, the stacked busbar can be connected to the cross beam; There are mounting holes on the cross beam, and the mounting holes are in contact with the insulator of the capacitor.

4. The capacitive system according to claim 3, wherein, After the rack is placed, the stacked busbar faces downward, the mounting and fixing surface faces upward, and the capacitance increasing capacitor module is pushed into the depth direction of the cabinet.

5. The capacitive system according to claim 3, wherein The stacked busbar includes: A first insulating layer configured to be located on the outermost side of the capacitance increasing capacitor module; A first conductive layer configured to be stacked on the first insulating layer; A second insulating layer configured to be stacked on the first conductive layer; A second conductive layer configured to be stacked on one side plane of the second insulating layer; A third conductive layer configured to be stacked on the other side plane of the second insulating layer; A third insulating layer configured to be stacked on the second conductive layer; and The fourth insulating layer is configured to be stacked on the third conductive layer.

6. The capacitive system according to claim 5, wherein There are multiple layers within the frame, and each layer is configured with a set of guide rails and crossbeams for the installation of the capacitance increasing modules on that layer; The capacitance increasing module slides to the nominal position of its layer so that the first electrical interface of the capacitance increasing module can be connected to the electrical interface of the frame; When the connection point between the main capacitance module and the capacitance increasing module is directly behind the capacitance increasing module, the capacitance arrangement is such that the gap between the capacitances allows the first electrical interface to be visible; When the connection point between the main capacitance module and the capacitance increasing module is directly below the capacitance increasing module, there are no requirements for the capacitance arrangement.

7. The capacitance system according to claim 5, characterized in that the first conductive layer is connected to the zero pole, and the second and third conductive layers are respectively connected to the positive pole and the negative pole; capacitance connection holes and avoidance holes are provided on the first, second, and third conductive layers; the capacitance connection holes are distributed below the capacitances of the same polarity as the second electrical interface; the avoidance holes are distributed below the capacitances of different polarities.

8. The capacitive system according to claim 1, wherein The side of the installation and fixing surface has a handle.

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