Parallel current sharing device for static var generator

Abstract

The utility model discloses a parallel current sharing device for a static var generator, which is characterized in that a plurality of transformers are clamped in a mounting box side by side from top to bottom and are used for current sharing of a plurality of reactive compensation modules on the static var generator; two sides of the transformer are provided with parallel and corresponding positioning grooves, corresponding positioning blocks are mounted in the mounting box, and the positioning blocks are clamped in the positioning grooves and are used for clamping and mounting the transformer; every two fixing mechanisms form a group, and the fixing mechanisms are correspondingly arranged on the positioning blocks on the mounting box side by side, so that the fixing mechanisms are used for fixing the transformers which are connected to the positioning blocks in a clamping manner. A plurality of positioning blocks with T-shaped structures are arranged on an installation box on the parallel current sharing device, and corresponding positioning grooves are formed in a plurality of transformers, so that the parallel current sharing transformers can be quickly installed on the installation box, and parallel current sharing is performed on a plurality of reactive compensation modules.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a parallel current-sharing device for a static VAR generator. Background Art

[0002] A static var generator (SVG), also known as a static synchronous compensator, is a dynamic reactive power compensator that uses an inverter to generate and absorb reactive power. It is a new generation of parallel reactive power compensation devices used for power flow control in power transmission systems. SVGs use power electronic converters to generate reactive power. Their main circuit converts DC voltage or current into AC power, which is then fed into the grid through a transformer, achieving reactive power compensation.

[0003] In the technical solution for modularly designing a static VAR generator, the capacity of each reactive compensation module is customized to a standard, and users can freely combine them according to system requirements and connect any number of reactive compensation modules in parallel. The prior art Chinese utility model patent discloses a parallel current-sharing device for reactive compensation modules (patent application number 201620102038.4). By making the turns ratios of the primary and secondary windings of multiple transformers the same, it is possible to achieve the same primary and secondary currents, thereby achieving the same current. However, the multiple transformers in the parallel current-sharing device for the reactive compensation module are inconvenient to install and remove during installation, and the transformers cannot be installed according to the number of reactive compensation modules, which affects the current sharing of the static VAR generator by the parallel current-sharing device. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a parallel current balancing device for a static VAR generator, which is used to solve the technical problem that multiple transformers on the parallel current balancing device of the existing static VAR generator module are inconvenient to install and disassemble during the installation process, and the transformers cannot be installed according to the number of reactive compensation modules, which affects the current balancing of the static VAR generator current by the parallel current balancing device.

[0005] According to the technical solution provided in the embodiments of the present application, a parallel current-sharing device for a static VAR generator includes several transformers that are snapped into place in a mounting box from top to bottom and are used to share the current of several reactive compensation modules on the static VAR generator.

[0006] The transformer is provided with parallel and corresponding positioning grooves on both sides, and corresponding positioning blocks are installed in the installation box, and the positioning blocks are clamped in the positioning grooves for clamping and installing the transformer;

[0007] A plurality of fixing mechanisms, which are arranged in pairs on the positioning blocks on the installation box in parallel and correspondingly, so that the fixing mechanisms can fix the transformer connected to the positioning blocks;

[0008] The fixing mechanism includes an adjusting bolt, a first fixing tooth and a second fixing tooth. The second fixing tooth is fixedly installed in the connecting groove on the positioning groove, and the first fixing tooth is movably installed in the movable groove on the positioning block. The adjusting bolt abuts against the first fixing tooth, so that after the adjusting bolt is rotated, the first fixing tooth is pushed to engage with the second fixing tooth, so that the transformer is fixedly installed on the mounting box.

[0009] Furthermore, a connecting wire is connected to the top of the installation box, and a connector is installed inside the installation box. The connector is provided with a plurality of first connection ports and a plurality of second connection ports, so that the two connection columns fixedly installed at the rear end of the transformer are clamped on the first connection ports and the second connection ports.

[0010] Furthermore, the fixing mechanism also includes two linkage rods and two return members, the two linkage rods are arranged in parallel and at intervals on both sides of the rear end of the first fixed tooth, and the two linkage rods are movably installed in the two sliding grooves set on the positioning block, and the two linkage rods are provided with corresponding return members so that the return members are used for the return of the first fixed tooth.

[0011] Furthermore, the return member is a spring made of metal material.

[0012] Furthermore, the positioning groove and the positioning block are in a T-shaped structure.

[0013] Furthermore, a plurality of air-permeable nets are provided on both sides of the installation box for dissipating heat from the plurality of transformers installed in the installation box.

[0014] Furthermore, the front end of the transformer is provided with two opposite connection ports for connecting the transformer to a series circuit of a reactive compensation module.

[0015] In summary, the beneficial effects of this application are:

[0016] 1. By setting several T-shaped positioning blocks on the installation box of the parallel current sharing device and setting corresponding positioning slots on several transformers, the parallel current sharing transformers can be quickly installed on the installation box, thereby performing parallel current sharing for several reactive compensation modules;

[0017] Second, a fixing mechanism is provided on the positioning block on the mounting box of the parallel current balancing device, so that after the adjusting bolt on the fixing mechanism is rotated and moved, the abutting first fixed tooth is pushed to move in the horizontal direction, so that the first fixed tooth is engaged with the second fixed tooth provided on the transformer, so that both sides of the transformer are fixed to the mounting box, preventing the transformer from moving and affecting the connection stability between the connecting column on the transformer and the first connection port and the second connection port on the connector, thereby improving the current balancing stability of the parallel current balancing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the decomposition structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] Numbers in the figure: transformer-100, positioning groove-101, connecting column-110, connecting port-120, installation box-200, positioning block-210, fixing mechanism-300, adjusting bolt-310, first fixing tooth-320, second fixing tooth-330, linkage rod-340, return member-350, connecting line-400, connector-500, first connecting port-510, second connecting port-520. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] A parallel current balancing device for static VAR generator, the structure of which is as follows Figure 1-Figure 4As shown, it includes several transformers 100, which are connected to the installation box 200 in parallel from top to bottom, and the primary winding and the secondary winding are used in the several transformers 100, so that the connection lines of the transformer 100 located at the top and the transformer 100 adjacent to it at the bottom are connected in series, so that the reactive compensation module connected to the transformer 100 located at the top is connected to the transformer 100 located at the bottom at the same time, so that the two transformers 100 are connected to the reactive compensation module load, thereby balancing the current of the several reactive compensation modules on the static VAR generator; the transformer 100 is provided with parallel and corresponding positioning grooves 101 on both sides, and the installation box 200 is installed with corresponding positioning blocks 210, which are clamped in the positioning groove 101 for the transformer 1 00's card-connected installation; a plurality of fixing mechanisms 300, which are arranged in pairs in parallel and correspondingly on the positioning block 210 on the installation box 200, so that the fixing mechanism 300 fixes the transformer 100 that is card-connected to the positioning block 210; the fixing mechanism 300 includes an adjusting bolt 310, a first fixing tooth 320 and a second fixing tooth 330, the second fixing tooth 330 is fixedly installed in the connecting groove on the positioning groove 101, and the first fixing tooth 320 is movably installed in the moving groove on the positioning block 210, and the adjusting bolt 310 abuts against the first fixing tooth 320, so that after the adjusting bolt 310 rotates, it pushes the first fixing tooth 320 and the second fixing tooth 330 to engage and connect, so that the transformer 100 is fixedly installed on the installation box 200.

[0027] During the parallel current balancing process of the parallel current balancing device for multiple reactive compensation modules, multiple transformers 100 for power current balancing are mounted on the positioning blocks 210 on the installation box 200 through the positioning slots 101, so that the two metal connection columns 110 fixedly mounted on the rear end of each transformer 100 are respectively inserted into the first connection port 510 and the second connection port 520 provided on the connector 500, so that the multiple transformers 100 are connected in parallel on the installation box 200, and each positioning block 210 on the installation box 200 is also provided with a fixing mechanism 300. , so that after the adjusting bolt 310 on the fixing mechanism 300 rotates and moves, the first fixing tooth 320 that is in contact with it moves horizontally along the moving groove, so that the first fixing tooth 320 is engaged and connected with the second fixing tooth 330 installed on the transformer 100 that is clamped on the positioning block 210, so that the two fixing mechanisms 300 fix both sides of the transformer 100 to prevent the transformer 100 from moving, and the connecting column 110 cannot be stably connected to the first connection port 510 and the second connection port 520, thereby improving the current sharing stability of the parallel current sharing device of the static VAR generator.

[0028] As a preferred embodiment, please refer to Figure 1 and Figure 2A connecting line 400 is connected to the top of the installation box 200, and a connector 500 is installed in the installation box 200. The connector 500 is provided with a plurality of first connection ports 510 and a plurality of second connection ports 520. Each first connection port 510 is connected to the live wire on the connecting line 400, and each second connection port 520 is connected to the neutral wire on the connecting line 400. The two metal connection columns 110 fixedly installed at the rear end of the transformer 100 are snapped onto the first connection port 120 and the second connection port 520, so that the transformer 100 is electrically connected to the power supply of the connecting line 400, so that the current output by the connecting line 400 by the plurality of transformers 100 is evenly distributed.

[0029] As a preferred embodiment, please refer to Figure 3 and Figure 4 The fixing mechanism 300 also includes two linkage rods 340 and two return members 350. The two linkage rods 340 are arranged in parallel and at intervals on both sides of the rear end of the first fixed tooth 320, and the two linkage rods 340 are movably installed in the two sliding grooves provided on the positioning block 210, and the two linkage rods 340 are sleeved with corresponding return members 350, so that when the adjusting bolt 310 rotates and pushes the first fixed tooth 320 to engage with the second fixed tooth 330, the two linkage rods 340 fixedly connected to the rear end of the first fixed tooth 320 move horizontally, thereby compressing the metal spring of the return member 350 sleeved on the linkage rod 340. When the transformer 100 needs to be disassembled or repaired, the adjusting bolt 310 is rotated in the opposite direction to cancel the abutment on the first fixed tooth 320. The elastic potential energy generated by the recovery of the metal spring of the return member 350 drives the first fixed tooth 320 to recover.

[0030] As a preferred embodiment, please refer to Figure 3 and Figure 4 The positioning groove 101 and the positioning block 210 are in a T-shaped structure, which improves the firmness of the card connection between the transformer 100 and the installation box 200.

[0031] As a preferred embodiment, please refer to Figure 1 and Figure 2 Several air-permeable nets are also provided on both sides of the installation box 200 for dissipating heat from the several transformers 100 installed in the installation box 200 .

[0032] As a preferred embodiment, please refer to Figure 1 and Figure 2 The front end of the transformer 100 is further provided with two opposite connection ports 120 for connecting the transformer 100 to the series circuit of the reactive power compensation module.

[0033] The working principle of the parallel current balancing device for static VAR generator in the utility model is as follows:

[0034] During the parallel current balancing process of the parallel current balancing device for multiple reactive compensation modules, multiple transformers 100 for power current balancing are mounted on the positioning blocks 210 on the installation box 200 through the positioning slots 101, so that the two metal connection columns 110 fixedly mounted on the rear end of each transformer 100 are respectively inserted into the first connection port 510 and the second connection port 520 provided on the connector 500, so that the multiple transformers 100 are connected in parallel on the installation box 200, and each positioning block 210 on the installation box 200 is also provided with a fixing mechanism 300. , so that after the adjusting bolt 310 on the fixing mechanism 300 rotates and moves, the first fixing tooth 320 that is in contact with it moves horizontally along the moving groove, so that the first fixing tooth 320 is engaged and connected with the second fixing tooth 330 installed on the transformer 100 that is clamped on the positioning block 210, so that the two fixing mechanisms 300 fix both sides of the transformer 100 to prevent the transformer 100 from moving, and the connecting column 110 cannot be stably connected to the first connection port 510 and the second connection port 520, thereby improving the current sharing stability of the parallel current sharing device of the static VAR generator.

[0035] The beneficial effects of the parallel current balancing device for static VAR generators of the utility model are as follows:

[0036] 1. By providing a plurality of T-shaped positioning blocks 210 on the mounting box 200 of the parallel current sharing device and providing corresponding positioning slots 101 on the plurality of transformers 100, the transformers 100 for parallel current sharing can be quickly installed on the mounting box 200, thereby performing parallel current sharing for a plurality of reactive compensation modules;

[0037] Second, a fixing mechanism 300 is provided on the positioning block 210 on the mounting box 200 of the parallel current balancing device. When the adjusting bolt 310 on the fixing mechanism 300 is rotated, the first fixing teeth 320 abutting against the fixing mechanism 300 are pushed to move horizontally, so that the first fixing teeth 320 engage with the second fixing teeth 330 provided on the transformer 100, thereby fixing both sides of the transformer 100 on the mounting box 200, preventing the transformer 100 from moving and affecting the connection stability between the connecting column 110 on the transformer 100 and the first connection port 510 and the second connection port 520 on the connector 500, thereby improving the current balancing stability of the parallel current balancing device.

[0038] The above description is merely an illustration of the preferred embodiments of this application and the technical principles employed. Furthermore, the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features. It also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A parallel current sharing device for a static VAR generator, characterized by: It comprises a plurality of transformers (100) which are connected in parallel from top to bottom in an installation box (200) and are used for current sharing of a plurality of reactive compensation modules on a static VAR generator; The transformer (100) is provided with parallel and corresponding positioning grooves (101) on both sides, and a corresponding positioning block (210) is installed in the installation box (200), and the positioning block (210) is snap-fitted into the positioning groove (101) for snap-fit installation of the transformer (100); A plurality of fixing mechanisms (300) are arranged in pairs on the positioning block (210) on the installation box (200) in parallel and correspondingly, so that the fixing mechanisms (300) can fix the transformer (100) connected to the positioning block (210) by snapping. The fixing mechanism (300) comprises an adjusting bolt (310), a first fixing tooth (320) and a second fixing tooth (330), wherein the second fixing tooth (330) is fixedly installed in a connecting groove on the positioning groove (101), and the first fixing tooth (320) is movably installed in a movable groove on the positioning block (210), and the adjusting bolt (310) abuts against the first fixing tooth (320), so that after the adjusting bolt (310) rotates, the first fixing tooth (320) is pushed to engage with the second fixing tooth (330), so that the transformer (100) is fixedly installed on the installation box (200).

2. The parallel current balancing device for a static VAR generator according to claim 1, characterized in that: A connecting line (400) is connected to the top of the installation box (200), and a connector (500) is installed in the installation box (200). The connector (500) is provided with a plurality of first connection ports (510) and a plurality of second connection ports (520), so that two connection columns (110) fixedly installed at the rear end of the transformer (100) are clamped on the first connection ports (120) and the second connection ports (520).

3. The parallel current balancing device for a static VAR generator according to claim 1, characterized in that: The fixing mechanism (300) further includes two linkage rods (340) and two return members (350), wherein the two linkage rods (340) are arranged in parallel and at intervals on both sides of the rear end of the first fixed tooth (320), and the two linkage rods (340) are movably installed in two slide grooves provided on the positioning block (210), and the two linkage rods (340) are sleeved with corresponding return members (350) so that the return members (350) are used for returning the first fixed tooth (320).

4. The parallel current balancing device for a static VAR generator according to claim 3, characterized in that: The return member (350) is a spring made of metal.

5. The parallel current balancing device for a static VAR generator according to claim 1, characterized in that: The positioning groove (101) and the positioning block (210) are in a T-shaped structure.

6. The parallel current balancing device for a static VAR generator according to claim 1, characterized in that: A plurality of air-permeable nets are also provided on both sides of the installation box (200) for dissipating heat from the plurality of transformers (100) installed in the installation box (200).

Images