Vehicle-mounted reactive power compensation device

Abstract

The utility model belongs to the technical field of power equipment, and discloses a vehicle-mounted reactive power compensation device. According to the vehicle-mounted reactive power compensation device, the design that the first-layer frame and the second-layer frame are stacked in the first direction is adopted, the first-layer three-phase capacitor module and the second-layer three-phase capacitor module are installed on the first-layer frame and the second-layer frame respectively, the space utilization rate of a trailer plate is greatly increased, and compared with traditional single-layer arrangement, the three-dimensional layout has the advantages that the space utilization rate is greatly increased; more devices can be accommodated in the same trailer area, and the reactive compensation requirement of larger capacity is met; the first-layer frame and the second-layer frame are detachably connected, so that the equipment is more convenient to mount, dismount and maintain, and the expansibility is improved; and at least part of busbars in the three-phase inlet wire busbar group are arranged in an L shape, so that the wiring complexity is reduced, the electrical connection between the capacitor bank and the current limiting reactor is facilitated, the wiring flexibility of the three-phase inlet wire busbar group can be improved, and the space utilization rate is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power equipment especially relates to on -vehicle reactive compensation device. BACKGROUND

[0002] Reactive compensation device is one of important equipment in power system, is widely used in power transmission and distribution network, through reactive compensation, can improve the power factor of system, reduces the transmission loss of reactive power, improves the power supply capacity and stability of power grid.

[0003] The existing mobile reactive compensation device usually adopts the way of single layer plane arrangement, this design occupies the larger trailer board area, leads to the lower space utilization, limits the promotion of equipment capacity, and the way of single layer plane arrangement wiring mode is complex, cannot flexibly adapt to the demand of different scenes.

[0004] Therefore, the on -vehicle reactive compensation device is needed to solve the above -mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model is provided with on -vehicle reactive compensation device, can improve the space utilization on trailer board, satisfies the demand of large -capacity reactive compensation.

[0006] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0007] On -vehicle reactive compensation device, comprising:

[0008] Trailer board;

[0009] Insulating frame assembly, including first layer frame and second layer frame that are sequentially stacked on the trailer board along the first direction, the second layer frame is detachably connected with the first layer frame;

[0010] Capacitor bank, including first layer three -phase capacitor module and second layer three -phase capacitor module, the first layer three -phase capacitor module is set up on the first layer frame, the second layer three -phase capacitor module is set up on the second layer frame;

[0011] Current -limiting reactor assembly and unbalanced current mutual inductor, along the second direction, the current -limiting reactor is located one end of the capacitor bank, the unbalanced current mutual inductor is located the other end of the capacitor bank, the first direction is perpendicular to the second direction;

[0012] Incoming line assembly, including three -phase incoming line busbar group, at least part of busbar in the three -phase incoming line busbar group is arranged in L type, the three -phase incoming line busbar group is configured to make the incoming line side of the first layer three -phase capacitor module and the second layer three -phase capacitor module with the current -limiting reactor assembly electric connection;

[0013] an outgoing line assembly configured to electrically connect outgoing line sides of the first layer three-phase capacitor module and the second layer three-phase capacitor module to the unbalance current transformer so that the first layer three-phase capacitor module and the second layer three-phase capacitor module are connected in parallel.

[0014] Optionally, the insulation frame assembly comprises an A-phase insulation pillar, a B-phase insulation pillar and a C-phase insulation pillar which are arranged on the trailer board in the second direction;

[0015] The A-phase insulation pillar is sequentially provided with a first layer A-phase composite insulator, a first layer A-phase frame, an A-phase interlayer composite insulator, a second layer A-phase frame and a second layer A-phase composite insulator in the first direction;

[0016] The B-phase insulation pillar is sequentially provided with a first layer B-phase composite insulator, a first layer B-phase frame, a B-phase interlayer composite insulator, a second layer B-phase frame and a second layer B-phase composite insulator in the first direction;

[0017] The C-phase insulation pillar is sequentially provided with a first layer C-phase composite insulator, a first layer C-phase frame, a C-phase interlayer composite insulator, a second layer C-phase frame and a second layer C-phase composite insulator in the first direction;

[0018] The first layer A-phase frame, the first layer B-phase frame and the first layer C-phase frame are configured to mount the first layer three-phase capacitor module;

[0019] The second layer A-phase frame, the second layer B-phase frame and the second layer C-phase frame are configured to mount the second layer three-phase capacitor module.

[0020] Optionally, the first layer three-phase capacitor module comprises:

[0021] a first layer A-phase unit capacitor movably mounted on the first layer A-phase frame;

[0022] a first layer B-phase unit capacitor movably mounted on the first layer B-phase frame;

[0023] a first layer C-phase unit capacitor movably mounted on the first layer C-phase frame, the first layer A-phase unit capacitor, the first layer B-phase unit capacitor and the first layer C-phase unit capacitor are sequentially connected in series;

[0024] The second layer three-phase capacitor module comprises:

[0025] a second layer A-phase unit capacitor movably mounted on the second layer A-phase frame;

[0026] a second layer B-phase unit capacitor movably mounted on the second layer B-phase frame;

[0027] a second layer C-phase unit capacitor movably mounted on the second layer C-phase frame, the second layer A-phase unit capacitor, the second layer B-phase unit capacitor and the second layer C-phase unit capacitor being connected in series.

[0028] Optionally, the first layer A-phase unit capacitor comprises at least three lugs, at least one of the lugs being movably hung on the first layer A-phase frame by a pin, and the other two lugs being fastened to the first layer A-phase frame by fasteners respectively.

[0029] Optionally, the three-phase incoming line busbar group comprises:

[0030] an A-phase incoming line group comprising an A-phase incoming line busbar, an A-phase busbar and an A-phase branch busbar connected in series, the A-phase incoming line busbar and the A-phase busbar being arranged in an L shape, and the A-phase busbar and the A-phase branch busbar being arranged in an L shape, the first layer A-phase unit capacitor and the second layer A-phase unit capacitor being electrically connected to the A-phase busbar through an A-phase branch busbar respectively;

[0031] a B-phase incoming line group comprising a B-phase incoming line busbar, a B-phase busbar and a B-phase branch busbar connected in series, the B-phase incoming line busbar and the B-phase busbar being arranged in an L shape, and the B-phase busbar and the B-phase branch busbar being arranged in an L shape, the first layer B-phase unit capacitor and the second layer B-phase unit capacitor being electrically connected to the B-phase busbar through a B-phase branch busbar respectively;

[0032] a C-phase incoming line group comprising a C-phase incoming line busbar, a C-phase busbar and a C-phase branch busbar connected in series, the C-phase incoming line busbar and the C-phase busbar being arranged in an L shape, and the C-phase busbar and the C-phase branch busbar being arranged in an L shape, the first layer C-phase unit capacitor and the second layer C-phase unit capacitor being electrically connected to the C-phase busbar through a C-phase branch busbar respectively.

[0033] Optionally, the incoming line assembly further comprises an incoming line busbar expansion joint configured to flexibly connect two adjacent A-phase incoming line busbars, and / or two adjacent B-phase incoming line busbars, and / or two adjacent C-phase incoming line busbars in the second direction.

[0034] Optionally, the outgoing line assembly comprises:

[0035] an outgoing line busbar expansion joint;

[0036] A plurality of first outgoing busbars, a plurality of the first outgoing busbars are sequentially electrically connected along the second direction, and adjacent two first outgoing busbars are connected through the outgoing busbar expansion joint, and the outgoing side of the first layer three-phase unit capacitor is electrically connected with the outgoing busbar expansion joint;

[0037] A plurality of second outgoing busbars, a plurality of the second outgoing busbars are sequentially electrically connected along the second direction, and adjacent two second outgoing busbars are connected through the outgoing busbar expansion joint, and the outgoing side of the second layer three-phase unit capacitor is electrically connected with the outgoing busbar expansion joint.

[0038] Optionally, the on-board reactive power compensation device further comprises:

[0039] A first clamp assembly is configured to detachably connect the incoming line assembly with the current limiting reactor assembly;

[0040] A second clamp assembly is configured to detachably connect the outgoing line assembly with the unbalanced current transformer.

[0041] The on-board reactive power compensation device further comprises a support, which is detachably arranged on the trailer plate and can be connected with the insulation frame assembly.

[0042] Optionally, the support comprises a plurality of first layer vertical rods, a transverse connecting rod and a plurality of second layer vertical rods, a plurality of the first layer vertical rods are arranged on the lower side of the transverse connecting rod along the second direction, a plurality of the second layer vertical rods are arranged on the upper side of the transverse connecting rod along the second direction, and the first layer vertical rods and the second layer vertical rods are staggered.

[0043] Beneficial effects:

[0044] The on-board reactive power compensation device provided by the utility model adopts the design that the first layer frame and the second layer frame are stacked along the first direction, the first layer three-phase capacitor module and the second layer three-phase capacitor module are respectively installed on the first frame and the second layer, the space utilization rate of the trailer plate is greatly improved, compared with the traditional single-layer arrangement, more equipment can be accommodated in the same trailer area, the demand for larger capacity reactive power compensation is met, the installation, disassembly and maintenance of the equipment are more convenient through the detachable connection design between the first layer frame and the second layer frame, the expansibility is improved, at least part of the busbars in the three-phase incoming line busbar group adopts L-shaped arrangement, the complexity of wiring is reduced, the electrical connection of the capacitor group and the current limiting reactor is facilitated, the flexibility of the three-phase incoming line busbar group wiring is improved, and the space utilization rate is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1It is the partial side view of the vehicle-mounted reactive power compensation device provided by the utility model;

[0046] Figure 2 It is the plan view of the vehicle-mounted reactive power compensation device provided by the utility model;

[0047] Figure 3 It is Figure 1 The section view at D-D in figure;

[0048] Figure 4 It is the structure schematic view of the incoming line busbar expansion joint provided by the utility model;

[0049] Figure 5 It is the structure schematic view of the support provided by the utility model.

[0050] In the figure,

[0051] 100, trailer board;

[0052] 200, insulating frame assembly;210, A-phase insulating support;211, first layer A-phase composite insulator;212, first layer A-phase frame;213, A-phase interlayer composite insulator;214, second layer A-phase frame;215, second layer A-phase composite insulator;220, B-phase insulating support;221, first layer B-phase composite insulator;222, first layer B-phase frame;223, B-phase interlayer composite insulator;224, second layer B-phase frame;225, second layer B-phase composite insulator;230, C-phase insulating support;231, first layer C-phase composite insulator;232, first layer C-phase frame;233, C-phase interlayer composite insulator;234, second layer C-phase frame;235, second layer C-phase composite insulator;

[0053] 300, capacitor bank;311, first layer A-phase unit capacitor;312, first layer B-phase unit capacitor;313, first layer C-phase unit capacitor;321, second layer A-phase unit capacitor;322, second layer B-phase unit capacitor;323, second layer C-phase unit capacitor;

[0054] 400, current limiting reactor assembly;410, A-phase current limiting reactor;420, B-phase current limiting reactor;430, C-phase current limiting reactor;440, A-phase lightning arrester;450, B-phase lightning arrester;460, C-phase lightning arrester;

[0055] 500, unbalanced current transformer;

[0056] 600, incoming line assembly; 610, A-phase incoming line group; 611, A-phase incoming line busbar; 612, A-phase busbar; 613, A-phase connecting busbar; 614, A-phase branch busbar; 620, B-phase incoming line group; 621, B-phase incoming line busbar; 622, B-phase busbar; 623, B-phase connecting busbar; 624, B-phase branch busbar; 630, C-phase incoming line group; 631, C-phase incoming line busbar; 632, C-phase busbar; 633, C-phase connecting busbar; 634, C-phase branch busbar; 640, incoming line busbar expansion joint; 641, flexible conductive strip; 642, busbar connecting terminal;

[0057] 700, outgoing line assembly; 710, first outgoing line busbar; 720, second outgoing line busbar; 730, outgoing line busbar expansion joint;

[0058] 800, first wire clamp assembly; 810, incoming line steel strand; 820, incoming line clamp;

[0059] 900, second wire clamp assembly; 910, outgoing line steel strand; 920, outgoing line clamp;

[0060] 1000, support; 1100, first layer vertical rod; 1200, transverse connecting rod; 1300, second layer vertical rod. DETAILED DESCRIPTION

[0061] The utility model will be described further in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0062] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0063] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under", can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is on, above and on of second feature includes that first feature is directly above and obliquely above of second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature is below, under and under of second feature includes that first feature is directly below and obliquely below of second feature, or only indicates that horizontal height of first feature is less than second feature.

[0064] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0065] The embodiment provides a kind of vehicle reactive compensation device, as shown in Figures 1-5 The vehicle reactive compensation device includes trailer board 100, insulation frame assembly 200, capacitor group 300, current limiting reactor assembly 400, unbalanced current transformer 500, incoming line assembly 600 and outgoing line assembly 700, insulation frame assembly 200 includes first layer frame and second layer frame sequentially stacked on trailer board 100 along first direction, and the second layer frame is detachably connected with the first layer frame;Capacitor group 300 includes first layer three-phase capacitor module and second layer three-phase capacitor module, the first layer three-phase capacitor module is arranged on the first layer frame, and the second layer three-phase capacitor module is arranged on the second layer frame;Along second direction, current limiting reactor is located at one end of capacitor group 300, and unbalanced current transformer 500 is located at the other end of capacitor group 300, and first direction is perpendicular to second direction;Incoming line assembly 600 includes three-phase incoming line busbar group, at least part of busbar in three-phase incoming line busbar group is arranged in L type, and three-phase incoming line busbar group is used to make incoming line side of first layer three-phase capacitor module and second layer three-phase capacitor module be electrically connected with current limiting reactor assembly 400, outgoing line assembly 700 is used to make outgoing line side of first layer three-phase capacitor module and second layer three-phase capacitor module be electrically connected with unbalanced current transformer 500, so that first layer three-phase capacitor module and second layer three-phase capacitor module are connected in parallel.

[0066] The vehicle-mounted reactive power compensation device provided by the embodiment adopts a design of stacking the first layer frame and the second layer frame along the first direction, and installs the first layer three-phase capacitor module and the second layer three-phase capacitor module on the first layer frame and the second layer frame respectively, thereby greatly improving the space utilization of the trailer plate 100. Compared with the traditional single-layer arrangement, the three-dimensional layout can accommodate more equipment in the same trailer area, meeting the demand for larger capacity reactive power compensation. The detachable connection design between the first layer frame and the second layer frame makes the installation, disassembly and maintenance of the equipment more convenient, and improves the expansibility. Moreover, at least part of the bus bars in the three-phase incoming line bus bar group adopts an L-shaped arrangement, which reduces the complexity of wiring, facilitates the electrical connection between the capacitor bank 300 and the current limiting reactor, improves the flexibility of the three-phase incoming line bus bar group wiring, and further improves the space utilization.

[0067] Optionally, as shown in Figure 1 The insulation frame assembly 200 includes A-phase insulation support 210, B-phase insulation support 220 and C-phase insulation support 230 arranged on the trailer plate 100 along the second direction; the A-phase insulation support 210 is sequentially provided with a first layer A-phase composite insulator 211, a first layer A-phase frame 212, an A-phase interlayer composite insulator 213, a second layer A-phase frame 214 and a second layer A-phase composite insulator 215 along the first direction; the B-phase insulation support 220 is sequentially provided with a first layer B-phase composite insulator 221, a first layer B-phase frame 222, a B-phase interlayer composite insulator 223, a second layer B-phase frame 224 and a second layer B-phase composite insulator 225 along the first direction; the C-phase insulation support 230 is sequentially provided with a first layer C-phase composite insulator 231, a first layer C-phase frame 232, a C-phase interlayer composite insulator 233, a second layer C-phase frame 234 and a second layer C-phase composite insulator 235 along the first direction; the first layer A-phase frame 212, the first layer B-phase frame 222 and the first layer C-phase frame 232 are used for installing the first layer three-phase capacitor module; the second layer A-phase frame 214, the second layer B-phase frame 224 and the second layer C-phase frame 234 are used for installing the second layer three-phase capacitor module, effectively avoiding electrical interference between different phases, enhancing the insulation performance of the vehicle-mounted reactive power compensation device, and ensuring the operation safety of the vehicle-mounted reactive power compensation device in a high-voltage and large-current environment.

[0068] Optionally, among the first layer A-phase composite insulator 211, the first layer A-phase frame 212, the A-phase interlayer composite insulator 213, the second layer A-phase frame 214 and the second layer A-phase composite insulator 215 arranged in sequence along the first direction on the A-phase insulating support 210, the adjacent two components are connected by bolt fastening, which can maintain the firmness of the connection between the components under transportation, vibration or external force, and ensure the overall structural stability and safety of the device. It should be noted that the connection mode of the components on the B-phase insulating support 220 and the connection mode of the components on the C-phase insulating support 230 are the same as the connection mode on the A-phase insulating support 210, and will not be described here again, so as to realize the detachable connection of the first layer frame and the second layer frame, and make the assembly and disassembly operation of the first layer frame and the second layer frame simple and fast.

[0069] In the embodiment, the composite insulator in each phase and the interlayer composite insulator are all silicone rubber composite insulating sleeves. Compared with traditional ceramic or glass insulating materials, the silicone rubber material has lower density, which significantly reduces the overall weight of the insulator, reduces the load of the trailer plate 100, and improves the moving speed. Moreover, the silicone rubber has excellent hydrophobicity. Even if water is attached to the surface, a hydrophobic film can be quickly formed, the surface conduction path is reduced, and the insulation effect is improved.

[0070] Optionally, as shown in Figure 1 The first layer three-phase capacitor module includes a first layer A-phase unit capacitor 311, a first layer B-phase unit capacitor 312 and a first layer C-phase unit capacitor 313. The first layer A-phase unit capacitor 311 is movably installed on the first layer A-phase frame 212, the first layer B-phase unit capacitor 312 is movably installed on the first layer B-phase frame 222, and the first layer C-phase unit capacitor 313 is movably installed on the first layer C-phase frame 232. The first layer A-phase unit capacitor 311, the first layer B-phase unit capacitor 312 and the first layer C-phase unit capacitor 313 are connected in series. The second layer three-phase capacitor module includes a second layer A-phase unit capacitor 321, a second layer B-phase unit capacitor 322 and a second layer C-phase unit capacitor 323. The second layer A-phase unit capacitor 321 is movably installed on the second layer A-phase frame 214, the second layer B-phase unit capacitor 322 is movably installed on the second layer B-phase frame 224, and the second layer C-phase unit capacitor 323 is movably installed on the second layer C-phase frame 234. The second layer A-phase unit capacitor 321, the second layer B-phase unit capacitor 322 and the second layer C-phase unit capacitor 323 are connected in series, thereby realizing the electrical connection mode of 2 series 2 parallel (i.e., three-phase series in the first layer three-phase capacitor module, three-phase series in the second layer three-phase capacitor module, and then parallel connection of the first layer three-phase capacitor and the second layer three-phase capacitor), and improving the capacity of the capacitor bank 300.

[0071] In the embodiment, the movable installation of the unit capacitor on the corresponding frame enables the unit capacitor to have a certain degree of freedom of movement, and when the device is running, transporting or subjected to external force impact, the mechanical vibration and stress impact can be dispersed, the damage risk of the capacitor shell and its connecting components can be reduced, and the shock resistance and durability of the overall structure can be improved.

[0072] Optionally, the first layer A phase unit capacitor 311 includes at least three lugs, one of the three lugs is movably hung on the first layer A phase frame 212 by a pin, and the other two lugs are respectively fastened to the first layer A phase frame 212 by fasteners, so that the capacitor has a certain space for movement after installation, and can adjust the position with the action of external force or structural change, thereby avoiding stress concentration caused by excessive fixation. In the embodiment, the fastener is a fastening bolt, which has good fastening effect and can make the connection between the first layer A unit capacitor 311 and the first layer A phase frame 212 more stable and reliable. The fixing modes of the second layer A phase unit capacitor 321, the first layer B phase unit capacitor 312, the second layer B phase unit capacitor 322, the first layer C phase unit capacitor 313 and the second layer C phase unit capacitor 323 are the same as the fixing structure of the first layer A phase unit capacitor 311, and will not be described here.

[0073] Optionally, as Figure 1 and Figure 2As shown, the three-phase incoming busbar group includes an A-phase incoming busbar group 610, a B-phase incoming busbar group 620, and a C-phase incoming busbar group 630. The A-phase incoming busbar group 610 includes an A-phase incoming busbar 611, an A-phase busbar 612, and an A-phase branch busbar 614 connected in sequence. The A-phase incoming busbar 611 and the A-phase busbar 612 are arranged in an L-shape, and the A-phase busbar 612 and the A-phase branch busbar 614 are also arranged in an L-shape. The first-layer A-phase unit capacitor 311 and the second-layer A-phase unit capacitor 321 are respectively electrically connected to the A-phase busbar 612 through an A-phase branch busbar 614. The B-phase incoming line group 620 includes a B-phase incoming busbar 621, a B-phase busbar 622, and a B-phase branch busbar 624 connected in sequence. The B-phase incoming busbar 621 and the B-phase busbar 622 are arranged in an L-shape, and the B-phase busbar 622 and the B-phase branch busbar 624 are also arranged in an L-shape. The first-layer B-phase unit capacitor 312 and the second-layer B-phase unit capacitor 322 are respectively electrically connected to the B-phase busbar 622 through a B-phase branch busbar 624. The C-phase incoming busbar 630 includes a C-phase incoming busbar 631, a C-phase busbar 632, and a C-phase branch busbar 634 connected in sequence. The C-phase incoming busbar 631 and the C-phase busbar 632 are arranged in an L-shape, as are the C-phase busbar 632 and the C-phase branch busbar 634. The first-layer C-phase unit capacitor 313 and the second-layer C-phase unit capacitor 323 are each electrically connected to the C-phase busbar 632 through a C-phase branch busbar 634. As described above, the L-shaped wiring structure of the incoming busbar and busbar, and the busbar and branch busbar for each phase fully utilizes vertical and horizontal space, reduces the busbar area occupied, reduces wiring complexity, facilitates the electrical connection between the capacitor bank 300 and the current-limiting reactor, improves the flexibility of the three-phase incoming busbar wiring, and further improves space utilization.

[0074] Optionally, such as Figure 2 As shown, to ensure sufficient insulation distance between the three-phase busbar groups, A-phase incoming busbar 611, B-phase incoming busbar 621, and C-phase incoming busbar 631 are spaced apart in the third direction. The first, second, and third directions are perpendicular to each other. The three-phase incoming busbar group also includes A-phase connecting busbar 613, B-phase connecting busbar 623, and C-phase connecting busbar 633. A-phase connecting busbar 613 and A-phase incoming busbar 611 are arranged in an L-shape. Busbar 613 is used to electrically connect phase A incoming busbar 611 and phase A busbar 612; phase B connecting busbar 623 is arranged in an L-shape with phase B incoming busbar 621, and phase B connecting busbar 623 is used to electrically connect phase B incoming busbar 621 and phase B busbar 622; phase C connecting busbar 633 is arranged in an L-shape with phase C incoming busbar 631, and phase C connecting busbar 633 is used to electrically connect phase C incoming busbar 631 and phase C busbar 632.

[0075] Optionally, the incoming line assembly 600 also includes an incoming busbar expansion joint 640, which is used to flexibly connect two adjacent A-phase incoming busbars 611, and / or two adjacent B-phase incoming busbars 621, and / or two adjacent C-phase incoming busbars 631 along the second direction. The incoming busbar expansion joint 640 can form a flexible connection between the busbars. This design effectively reduces stress deformation that may occur during transportation and prevents adjacent incoming busbars from deforming, being damaged or failing due to external forces, thereby improving the safety and durability of the equipment.

[0076] Specifically, the first-layer A-phase unit capacitor 311 and the second-layer A-phase unit capacitor 321 are close to the current-limiting reactor assembly 400, so power transmission can be completed through only one A-phase incoming busbar 611; while the first-layer B-phase unit capacitor 312 and the second-layer B-phase unit capacitor 322, the first-layer C-phase unit capacitor 313 and the second-layer C-phase unit capacitor 323 are far from the current-limiting reactor assembly 400, and power transmission is required through multiple B-phase incoming busbars 621 and multiple C-phase incoming busbars 631 connected in series along the second direction, respectively. The two adjacent B-phase incoming busbars 621 and the two adjacent C-phase incoming busbars 631 along the second direction are all softly connected through the incoming busbar expansion joint 640.

[0077] Optionally, such as Figure 4 As shown, the incoming busbar expansion joint 640 can be formed by stacking multiple layers of copper foil or aluminum foil to form a flexible conductive strip 641. The two ends of the flexible conductive strip 641 are pressed into busbar connection terminals 642 to provide excellent electrical conductivity and flexibility, and to withstand multi-directional deformation and bending.

[0078] Optionally, the outgoing line assembly 700 includes an outgoing busbar expansion joint 730, multiple first outgoing busbars 710, and multiple second outgoing busbars 720. The multiple first outgoing busbars 710 are sequentially electrically connected along a second direction, and adjacent first outgoing busbars 710 are flexibly connected through the outgoing busbar expansion joint 730. The outgoing line side of the first layer three-phase unit capacitor is electrically connected to the outgoing busbar expansion joint 730. Similarly, the multiple second outgoing busbars 720 are sequentially electrically connected along a second direction, and adjacent second outgoing busbars 720 are flexibly connected through the outgoing busbar expansion joint 730. The outgoing line side of the second layer three-phase unit capacitor is electrically connected to the outgoing busbar expansion joint 730. The outgoing busbar expansion joint 730 evenly distributes the mechanical stress at the connection points of the outgoing busbars, improving the overall structural stability. In this embodiment, the outgoing busbar expansion joint 730 can be formed by stacking multiple layers of copper foil or aluminum foil to create a flexible conductive strip. The two ends of the flexible conductive strip are pressed into busbar connection terminals to provide excellent electrical conductivity and flexibility, capable of withstanding multi-directional deformation and bending. It should be noted that the structure of the outgoing busbar expansion joint 730 is the same as that of the incoming busbar expansion joint 640, and will not be described again here.

[0079] Optionally, the on-board reactive power compensation device further comprises a first wire clamp assembly 800 and a second wire clamp assembly 900, the first wire clamp assembly 800 is used to detachably connect the incoming wire assembly 600 with the current limiting reactor assembly 400, and the second wire clamp assembly 900 is used to detachably connect the outgoing wire assembly 700 with the unbalanced current transformer 500; through the design of the detachable incoming wire assembly 600 and the outgoing wire assembly 700, the device can be divided into multiple modules during transportation, which facilitates loading and unloading, and when installed on site, each assembly can be quickly spliced and connected, thereby shortening the installation time of the device and improving the installation efficiency.

[0080] Specifically, the first wire clamp assembly 800 comprises an incoming wire steel strand 810 and an incoming wire clamp 820, both ends of the incoming wire steel strand 810 are respectively provided with the incoming wire clamp 820, one end of the incoming wire steel strand 810 is connected with the current limiting reactor assembly through the incoming wire clamp 820, and the other end is connected with the capacitor bank 300 through the incoming wire clamp 820.

[0081] Optionally, the second wire clamp assembly 900 comprises an outgoing wire steel strand 910 and an outgoing wire clamp 920, both ends of the outgoing wire steel strand 910 are respectively provided with the outgoing wire clamp 920. In this embodiment, the first layer of outgoing wire busbar is connected with the unbalanced current transformer 500 through one second wire clamp assembly 900, and the second layer of outgoing wire busbar is connected with the unbalanced current transformer 500 through one second wire clamp assembly 900, so as to realize the quick connection work of the capacitor bank 300 and the unbalanced current transformer 500 and improve the installation efficiency.

[0082] In this embodiment, the current limiting reactor assembly comprises an A-phase current limiting reactor 410, a B-phase current limiting reactor 420 and a C-phase current limiting reactor 430 which are electrically connected with an A-phase line, a B-phase line and a C-phase line respectively, the A-phase current limiting reactor 410, the B-phase current limiting reactor 420 and the C-phase current limiting reactor 430 are arranged in a triangular shape on the trailer plate 100, an A-phase surge arrester 440, a B-phase surge arrester 450 and a C-phase surge arrester 460 are respectively connected with the corresponding current limiting reactor through the first wire clamp assembly 800, and an A-phase incoming wire busbar 611, a B-phase incoming wire busbar 621 and a C-phase incoming wire busbar 631 are respectively electrically connected with the A-phase current limiting reactor 410, the B-phase current limiting reactor 420 and the C-phase current limiting reactor 430 through the first wire clamp assembly 800.

[0083] Optionally, as Figure 5As shown, the on-board reactive power compensation device further comprises a support 1000, which is detachably arranged on the trailer plate 100 and can be connected with the insulating frame assembly 200, thereby providing a firm and reliable support structure for the on-board reactive power compensation device, and the support 1000 can significantly improve the stability of the on-board reactive power compensation device when facing long-distance transportation, high-speed driving, bumpy road sections or bad weather. Optionally, the support 1000 is fastened on the trailer plate 100 by bolts, which can improve the stability of the support 1000, and in the embodiment, the support 1000 is arranged on both sides of the capacitor bank 300, which can further improve the stability of the capacitor bank 300 during transportation.

[0084] Optionally, as shown in the drawings, Figure 5 As shown, the support 1000 comprises a plurality of first-layer vertical rods 1100, a transverse connecting rod 1200 and a plurality of second-layer vertical rods 1300, the plurality of first-layer vertical rods 1100 are arranged on the lower side of the transverse connecting rod 1200 in the second direction, the plurality of second-layer vertical rods 1300 are arranged on the upper side of the transverse connecting rod 1200 in the second direction, and the first-layer vertical rods 1100 and the second-layer vertical rods 1300 are staggered, thereby improving the structural strength of the support 1000, avoiding deformation of the support 1000 caused by vibration and impact during transportation or operation, and ensuring the stability of the support 1000 and the device.

[0085] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, readjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An on-board reactive power compensation device, characterized by, The application relates to a trailer capacitor bank, comprising: a trailer plate (100); an insulating frame assembly (200) comprising a first layer frame and a second layer frame stacked in sequence along a first direction on the trailer plate (100), the second layer frame being detachably connected with the first layer frame; a capacitor bank (300) comprising a first layer of three-phase capacitor modules and a second layer of three-phase capacitor modules, the first layer of three-phase capacitor modules being arranged on the first layer frame, and the second layer of three-phase capacitor modules being arranged on the second layer frame; a current limiting reactor assembly (400) and an unbalanced current transformer (500) along a second direction, the current limiting reactor being located at one end of the capacitor bank (300), and the unbalanced current transformer (500) being located at the other end of the capacitor bank (300), the first direction being perpendicular to the second direction; an incoming line assembly (600) comprising a three-phase incoming line busbar group, at least part of the busbars in the three-phase incoming line busbar group being arranged in an L shape, the three-phase incoming line busbar group being configured to electrically connect incoming line sides of the first layer of three-phase capacitor modules and the second layer of three-phase capacitor modules with the current limiting reactor assembly (400); an outgoing line assembly (700) configured to electrically connect outgoing line sides of the first layer of three-phase capacitor modules and the second layer of three-phase capacitor modules with the unbalanced current transformer (500) so that the first layer of three-phase capacitor modules and the second layer of three-phase capacitor modules are connected in parallel.

2. The on-board reactive power compensation device according to claim 1, characterized in that The insulating frame assembly (200) comprises an A-phase insulating support (210), a B-phase insulating support (220) and a C-phase insulating support (230) arranged at intervals along the second direction on the trailer plate (100); the A-phase insulating support (210) is sequentially provided with a first layer A-phase composite insulator (211), a first layer A-phase frame (212), an A-phase interlayer composite insulator (213), a second layer A-phase frame (214) and a second layer A-phase composite insulator (215) along the first direction; the B-phase insulating support (220) is sequentially provided with a first layer B-phase composite insulator (221), a first layer B-phase frame (222), a B-phase interlayer composite insulator (223), a second layer B-phase frame (224) and a second layer B-phase composite insulator (225) along the first direction; the C-phase insulating support (230) is sequentially provided with a first layer C-phase composite insulator (231), a first layer C-phase frame (232), a C-phase interlayer composite insulator (233), a second layer C-phase frame (234) and a second layer C-phase composite insulator (235) along the first direction; the first layer A-phase frame (212), the first layer B-phase frame (222) and the first layer C-phase frame (232) are configured to mount the first layer of three-phase capacitor modules; the second layer A-phase frame (214), the second layer B-phase frame (224) and the second layer C-phase frame (234) are configured to mount the second layer of three-phase capacitor modules.

3. The on-board reactive power compensation device according to claim 2, characterized in that The first layer of three-phase capacitor modules comprises: The first layer A-phase unit capacitor (311) is movably mounted on the first layer A-phase frame (212); The first layer B-phase unit capacitor (312) is movably mounted on the first layer B-phase frame (222); The first layer C-phase unit capacitor (313) is movably mounted on the first layer C-phase frame (232), and the first layer A-phase unit capacitor (311), the first layer B-phase unit capacitor (312) and the first layer C-phase unit capacitor (313) are connected in series. The second layer three-phase capacitor module comprises: The second layer A-phase unit capacitor (321) is movably mounted on the second layer A-phase frame (214); The second layer B-phase unit capacitor (322) is movably mounted on the second layer B-phase frame (224); The second layer C-phase unit capacitor (323) is movably mounted on the second layer C-phase frame (234), and the second layer A-phase unit capacitor (321), the second layer B-phase unit capacitor (322) and the second layer C-phase unit capacitor (323) are connected in series.

4. The on-board reactive power compensation device according to claim 3, characterized in that The first layer A-phase unit capacitor (311) comprises at least three lugs, at least one of the lugs is movably hung on the first layer A-phase frame (212) through a pin, and the other two lugs are respectively fastened to the first layer A-phase frame (212) through fasteners.

5. The on-board reactive power compensation device according to claim 3, characterized in that, The three-phase incoming line busbar group comprises: The A-phase incoming line group (610) comprises an A-phase incoming line busbar (611), an A-phase busbar (612) and an A-phase branch busbar (614) connected in series, the A-phase incoming line busbar (611) and the A-phase busbar (612) are arranged in an L shape, the A-phase busbar (612) and the A-phase branch busbar (614) are arranged in an L shape, and the first layer A-phase unit capacitor (311) and the second layer A-phase unit capacitor (321) are respectively connected to the A-phase busbar (612) through an A-phase branch busbar (614); The B-phase incoming line group (620) comprises a B-phase incoming line busbar (621), a B-phase busbar (622) and a B-phase branch busbar (624) connected in series, the B-phase incoming line busbar (621) and the B-phase busbar (622) are arranged in an L shape, the B-phase busbar (622) and the B-phase branch busbar (624) are arranged in an L shape, and the first layer B-phase unit capacitor (312) and the second layer B-phase unit capacitor (322) are respectively connected to the B-phase busbar (622) through a B-phase branch busbar (624); The C-phase incoming line group (630) comprises a C-phase incoming line busbar (631), a C-phase busbar (632) and a C-phase branch busbar (634) connected in sequence, the C-phase incoming line busbar (631) and the C-phase busbar (632) are arranged in an L shape, the C-phase busbar (632) and the C-phase branch busbar (634) are arranged in an L shape, and the first layer C-phase unit capacitor (313) and the second layer C-phase unit capacitor (323) are respectively connected to the C-phase busbar (632) through a C-phase branch busbar (634).

6. The on-board reactive power compensation device according to claim 5, characterized in that The incoming line assembly (600) further comprises an incoming line busbar expansion joint (640), which is configured to flexibly connect two adjacent A-phase incoming line busbars (611), two adjacent B-phase incoming line busbars (621) and / or two adjacent C-phase incoming line busbars (631) in the second direction.

7. The on-board reactive power compensation device according to claim 1, characterized in that, The outgoing line assembly (700) comprises: an outgoing line busbar expansion joint (730); a plurality of first outgoing line busbars (710) connected in sequence in the second direction, two adjacent first outgoing line busbars (710) being flexibly connected through the outgoing line busbar expansion joint (730), and the outgoing side of the first layer three-phase unit capacitor being connected to the outgoing line busbar expansion joint (730); a plurality of second outgoing line busbars (720) connected in sequence in the second direction, two adjacent second outgoing line busbars (720) being flexibly connected through the outgoing line busbar expansion joint (730), and the outgoing side of the second layer three-phase unit capacitor being connected to the outgoing line busbar expansion joint (730).

8. The on-board reactive power compensation device according to claim 7, characterized in that The vehicle-mounted reactive power compensation device further comprises: a first clamp assembly (800) configured to detachably connect the incoming line assembly (600) and the current limiting reactor assembly (400); a second clamp assembly (900) configured to detachably connect the outgoing line assembly (700) and the unbalanced current transformer (500).

9. The on-board reactive power compensation device according to any of claims 1-8, characterized in that, The vehicle-mounted reactive power compensation device further comprises a support (1000) detachably arranged on the trailer plate (100), which can be connected to the insulating frame assembly (200).

10. The on-board reactive power compensation device according to claim 9, characterized in that, The support (1000) comprises a plurality of first layer vertical rods (1100), a transverse connecting rod (1200) and a plurality of second layer vertical rods (1300), the first layer vertical rods (1100) being arranged on the lower side of the transverse connecting rod (1200) in the second direction, and the second layer vertical rods (1300) being arranged on the upper side of the transverse connecting rod (1200) in the second direction, the first layer vertical rods (1100) and the second layer vertical rods (1300) being staggered.

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