Novel direct current magnetic bias suppression device

Abstract

The utility model discloses a novel direct current magnetic bias suppression device, which relates to the field of power transmission equipment and comprises an equipment box, an opening is arranged on one side wall of the equipment box, a controller capable of transversely turning over is arranged in the opening, an electric connection base is fixedly mounted at the inner bottom of the equipment box, a plurality of resistor bodies are arranged on the electric connection base, and the resistor bodies are arranged on the electric connection base. One side of the resistor body is fixedly connected with an n-shaped conductor, and the lower end of the resistor body and the lower end of the n-shaped conductor are each provided with a translation conductive structure used for being electrically connected with the electric connection base. An electric push rod is controlled by a controller to drive a resistor body to transversely move, at the moment, two T-shaped conductive heads at the lower end of an n-shaped conductive body are conductively connected with electric connecting pieces in corresponding T-shaped slots, the n-shaped conductive body participates in series connection, and the effect of rapidly reducing resistance is achieved; and the mounting plate is overturned outside the equipment box to rotate by 180 degrees, and the controller is overturned to the outside of the equipment box along with the mounting plate, so that the maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of power transmission equipment technology, specifically to a novel DC bias suppression device. Background Technology

[0002] The DC bias phenomenon in power transformers is receiving increasing attention from substations. Its harmful effects on transformers include increased vibration and noise, increased temperature rise, and in severe cases, transformer burnout or even the collapse of the entire power grid. Currently, reverse current injection and neutral point series capacitor methods are commonly used to eliminate DC bias. However, these methods are costly due to their complex design and numerous components. Consequently, the neutral point series resistor method has emerged as a solution to eliminate DC bias.

[0003] Existing transformer DC bias suppression devices mostly employ the neutral point series resistor method, where the series resistance value is fixed. Disassembly is very troublesome when the resistance value needs to be adjusted, making it difficult to adapt to the DC bias suppression requirements of different resistance values ​​in different scenarios. Moreover, when inspecting and debugging the equipment controller, it is currently necessary to enter the confined space of a container, which is inconvenient and lacks practicality. Utility Model Content

[0004] The purpose of this invention is to provide a novel DC bias suppression device to solve the above-mentioned problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a novel DC bias suppression device, comprising an equipment box with an opening on one side wall. A controller capable of horizontal rotation is located within the opening. An electrical connection base is fixedly installed on the inner bottom of the equipment box. Several resistors are mounted on the electrical connection base. An n-shaped conductor is fixedly connected to one side of each resistor. Both the resistors and the n-shaped conductors have a translational conductive structure at their lower ends for electrical connection with the electrical connection base. The translational conductive structure is configured to disconnect the n-shaped conductor from the electrical connection base when the resistors are electrically connected to it, and disconnect the resistors from the electrical connection base when the n-shaped conductors are electrically connected to it. The rear side wall of the equipment box has several driving structures for moving several resistors along the width of the electrical connection base. Both the front and rear side walls of the equipment box have heat dissipation structures.

[0007] Preferably, the opening is provided with a mounting plate, and a fixing shaft is fixedly connected to the middle of the upper and lower ends of the mounting plate. A shaft hole for fitting the fixing shaft is opened on the upper and lower end faces of the opening, and the controller is fixedly mounted on the surface of the mounting plate.

[0008] Preferably, the inner wall of the opening is provided with a rubber pad, and the mounting plate is in contact with the rubber pad on all four sides.

[0009] Preferably, a limiting plate is fixedly connected to the middle of one side of the opening, and it will abut against the mounting plate after the mounting plate is rotated 180 degrees. The connection line of the controller is connected to the inside of the equipment box from its side wall.

[0010] Preferably, one end of the electrical connection base is electrically connected to a neutral point connector line, and the other end of the electrical connection base extends to the outside of the equipment box via a connecting wire.

[0011] Preferably, the resistor has an insulating shell on its outer side, which is a plate-shaped design.

[0012] Preferably, the translational conductive structure includes two T-shaped conductive heads, and the two T-shaped conductive heads at the lower ends of the resistive body and the n-shaped conductor are located at the positive and negative poles, respectively. The upper surface of the electrical connection base is provided with several sets of T-shaped slots that are adapted to be inserted into the T-shaped conductive heads. Each end of the T-shaped slot is equipped with an electrical connection piece that is electrically connected to the T-shaped conductive head.

[0013] Preferably, each group of T-shaped slots has four slots, and the four T-shaped slots are distributed in pairs on both sides of the electrical connection base. The two T-shaped slots on the same side correspond to the positive or negative poles of the lower end of the resistor and the n-shaped conductor, respectively. The positive and negative poles of the two adjacent groups of T-shaped slots are electrically connected, and the connecting wire and the neutral point connector wire are electrically connected to the positive and negative poles in the T-shaped slots, respectively.

[0014] Preferably, the drive structure includes two slide rods fixedly connected to the side wall of the resistor, a fixed sleeve fixedly connected to the rear side wall of the equipment box and slidably connected to the two slide rods, and an electric push rod fixedly installed on the rear side wall of the equipment box, with the movable end of the electric push rod fixedly connected to the middle of the side wall of the resistor, and the input end of the electric push rod electrically connected to the output end of the controller.

[0015] Preferably, the heat dissipation structure includes two heat dissipation holes on the front side wall of the equipment box, each of which is fixedly installed with a cooling fan. An air exchange slot is provided on the rear side wall of the equipment box, and both the heat dissipation holes and the air exchange slot are equipped with filters. The input end of the cooling fan is electrically connected to the output end of the controller.

[0016] The beneficial effects are:

[0017] 1. The controller controls the electric push rod to move the resistor horizontally. At this time, the two T-shaped conductive heads at the lower end of the n-shaped conductor are electrically connected to the electrical connecting piece in the corresponding T-shaped slot. The n-shaped conductor participates in the series connection, which achieves the effect of quickly reducing resistance. When the controller needs to be repaired, the mounting plate is flipped 180 degrees on the outside of the equipment box. At this time, the controller is flipped to the outside of the equipment box for easy repair.

[0018] 2. At the same time, when the internal temperature of the equipment box is too high, the controller controls the cooling fan to rotate, which drives the outside cold air into the equipment box through the heat dissipation holes, passes between several resistors, and is discharged from the ventilation slot to achieve heat dissipation and cooling. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a rear-side split perspective view of this utility model;

[0022] Figure 3 This is a cross-sectional perspective view of the equipment box of this utility model;

[0023] Figure 4 This is a three-dimensional view of the resistor element of this utility model.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Equipment box; 2. Opening; 201. Mounting plate; 202. Fixed shaft; 203. Limiting plate; 3. Controller; 4. Heat dissipation structure; 401. Heat dissipation hole; 402. Cooling fan; 403. Ventilation slot; 5. Electrical connection base; 6. Neutral point connector wire; 7. Resistor; 8. n-shaped conductor; 9. Fixing sleeve; 10. Slide rod; 11. Electric push rod; 12. T-shaped conductive head; 13. T-shaped slot; 14. Electrical connection piece. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] See Figures 1-4 As shown, this utility model provides a novel DC bias suppression device, including an equipment box 1. An opening 2 is provided on one side wall of the equipment box 1, and a controller 3 that can be flipped laterally is provided in the opening 2. An electrical connection base 5 is fixedly installed on the inner bottom of the equipment box 1. A plurality of resistors 7 are provided on the electrical connection base 5. An n-shaped conductor 8 is fixedly connected to one side of the resistor 7. The lower ends of the resistors 7 and the n-shaped conductor 8 are provided with translational conductive structures for being electrically connected to the electrical connection base 5. The translational conductive structures are configured such that when the resistors 7 are electrically connected to the electrical connection base 5, the connection between the n-shaped conductor 8 and the electrical connection base 5 is disconnected; when the n-shaped conductor 8 is electrically connected to the electrical connection base 5, the connection between the resistors 7 and the electrical connection base 5 is disconnected. A plurality of driving structures are provided on the rear side wall of the equipment box 1 for driving a plurality of resistors 7 to move along the wide side of the electrical connection base 5. Heat dissipation structures 4 are provided on both the front and rear side walls of the equipment box 1.

[0028] Reference Figure 2 As shown, an installation plate 201 is provided in the opening 2. A fixed shaft 202 is fixedly connected to the middle of the upper and lower ends of the installation plate 201. A shaft hole for fitting the fixed shaft 202 is opened on the upper and lower end surfaces of the opening 2. The controller 3 is fixedly installed on the surface of the installation plate 201. A rubber pad is provided on the inner wall of the opening 2. The installation plate 201 is in contact with the rubber pad on all four sides. By rotating the installation plate 201, the controller 3 can be flipped to the outside of the equipment box 1 for easy maintenance. At the same time, the rubber pad can provide friction for the rotation of the installation plate 201, and achieve the positioning and fixing effect after rotation.

[0029] Furthermore, a limiting plate 203 is fixedly connected to the middle of one side of the opening 2, and it will abut against the mounting plate 201 after it rotates 180 degrees. The connection line of the controller 3 is connected from its side wall to the inside of the equipment box 1, so that the limiting plate 203 can only rotate 180 degrees when it rotates laterally, thus avoiding the connection line from obstructing the rotation.

[0030] As an optional implementation, one end of the electrical connection base 5 is electrically connected to the neutral point connector line 6, and the other end of the electrical connection base 5 extends to the outside of the equipment box 1 through a connecting wire. The outside of the resistor 7 is provided with an insulating shell, which is a plate-shaped design. The insulating shell can improve safety, and the plate-shaped design can improve heat dissipation efficiency.

[0031] Reference Figure 3-4 As shown, the translational conductive structure includes two T-shaped conductive heads 12, and the two T-shaped conductive heads 12 at the lower ends of the resistor 7 and the n-shaped conductor 8 are located at the positive and negative poles, respectively. The upper surface of the electrical connection base 5 is provided with several sets of T-shaped slots 13 that are adapted to the insertion of the T-shaped conductive heads 12. Each end of the T-shaped slot 13 is equipped with an electrical connecting piece 14 that is electrically connected to the T-shaped conductive head 12. By laterally translating the resistor 7, the two T-shaped conductive heads 12 on one side can be inserted into the T-shaped slot 13 (the resistor 7 or the n-shaped conductor 8 can be controlled to participate in the series connection). Here, the n-shaped conductor 8 is a conductive metal rod. At this time, the electrical connecting piece 14 in the T-shaped slot 13 is electrically connected to the T-shaped conductive head 12, so that the current can flow.

[0032] As an optional implementation, each group of T-shaped slots 13 consists of four slots, which are distributed in pairs on both sides of the electrical connection base 5. The two T-shaped slots 13 on the same side correspond to the positive or negative terminals of the resistor 7 and the n-shaped conductor 8, respectively. The positive and negative terminals of adjacent groups of T-shaped slots 13 are electrically connected, and the connecting wire and the neutral point connector 6 are electrically connected to the positive and negative terminals in the T-shaped slots 13, respectively. By moving the resistor 7 (taking the reduction of resistance as an example), the two T-shaped conductive heads 12 at the lower end of the n-shaped conductor 8 can be electrically connected to the electrical connecting piece 14 in the corresponding T-shaped slot 13. At this time, the resistor 7 is disconnected from the series connection, and the n-shaped conductor 8 participates in the series connection, thereby achieving the effect of quickly reducing resistance. The connecting wire can be connected to the power supply terminal or the ground terminal as appropriate to ensure the normal use of the equipment.

[0033] As an optional implementation, the drive structure includes two slide rods 10 fixedly connected to the side wall of the resistor 7. A fixed sleeve 9 is fixedly connected to the rear side wall of the equipment box 1 and slidably connected to the two slide rods 10. An electric push rod 11 is also fixedly installed on the rear side wall of the equipment box 1. The movable end of the electric push rod 11 is fixedly connected to the middle of the side wall of the resistor 7, and the input end of the electric push rod 11 is electrically connected to the output end of the controller 3. By setting the two slide rods 10 and the fixed sleeve 9, the resistor 7 can be more stable when moving laterally. The controller 3 controls the electric push rod 11 to drive the resistor 7 to move laterally, at which time the slide rods 10 slide in the fixed sleeve 9.

[0034] Reference Figure 3As shown, the heat dissipation structure 4 includes two heat dissipation holes 401 on the front side wall of the equipment box 1. A cooling fan 402 is fixedly installed in each of the two heat dissipation holes 401. An air exchange slot 403 is provided on the rear side wall of the equipment box 1. Both the heat dissipation holes 401 and the air exchange slot 403 are equipped with filters. The input end of the cooling fan 402 is electrically connected to the output end of the controller 3. The controller 3 controls the cooling fan 402 to rotate, driving the outside cold air into the equipment box 1 from the heat dissipation holes 401. After passing between several resistors 7, the air is discharged from the air exchange slot 403, thus achieving heat dissipation and cooling. The filters can prevent external dust and impurities from entering the interior of the equipment box 1. The cooling fan 402 is composed of fan blades and a motor, and its model is FP-20060EX S1 B cooling fan.

[0035] The working principle of this utility model:

[0036] When it is necessary to adjust the resistance value of the bias suppression series, the controller 3 controls the electric push rod 11 to drive the resistor 7 to move laterally. At this time, the slide rod 10 slides in the fixed sleeve 9, and at the same time, the two T-shaped conductive heads 12 at the lower end of the n-shaped conductor 8 are electrically connected to the electrical connection piece 14 in the corresponding T-shaped slot 13. At this time, the resistor 7 is disengaged from the series connection, and the n-shaped conductor 8 participates in the series connection, achieving the effect of quickly reducing resistance. At the same time, when the internal temperature of the equipment box 1 is too high, the controller 3 controls the cooling fan 402 to rotate, driving the outside cold air into the equipment box 1 from the heat dissipation hole 401. After passing between several resistors 7, it is discharged from the ventilation slot 403 to achieve heat dissipation and cooling. When it is necessary to repair the controller 3, the mounting plate 201 is flipped on the outside of the equipment box 1 to rotate 180 degrees. At this time, the controller 3 is flipped to the outside of the equipment box 1 for easy repair.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A novel DC bias suppression device, characterized in that: The device includes a housing (1), with an opening (2) on one side wall. A horizontally rotatable controller (3) is located within the opening (2). An electrical connection base (5) is fixedly installed on the inner bottom of the housing (1). Several resistors (7) are mounted on the electrical connection base (5). An n-shaped conductor (8) is fixedly connected to one side of each resistor (7). Both the resistors (7) and the n-shaped conductor (8) have a translational conductive structure at their lower ends for electrical connection with the electrical connection base (5). The translational conductive structure is configured such that when the resistor (7) is electrically connected to the electrical connection base (5), the connection between the n-shaped conductor (8) and the electrical connection base (5) is disconnected; when the n-shaped conductor (8) is electrically connected to the electrical connection base (5), the connection between the resistor (7) and the electrical connection base (5) is disconnected. The rear side wall of the equipment box (1) is provided with a number of driving structures for driving a number of resistors (7) to move along the wide side of the electrical connection base (5). The front and rear side walls of the equipment box (1) are provided with heat dissipation structures (4).

2. The novel DC bias suppression device according to claim 1, characterized in that: An installation plate (201) is provided in the opening (2). A fixed shaft (202) is fixedly connected to the middle of the upper and lower ends of the installation plate (201). A shaft hole for fitting the fixed shaft (202) is opened on the upper and lower end surfaces of the opening (2). The controller (3) is fixedly installed on the surface of the installation plate (201).

3. The novel DC bias suppression device according to claim 2, characterized in that: The inner wall of the opening (2) is provided with a rubber pad, and the mounting plate (201) is in contact with the rubber pad on all four sides.

4. The novel DC bias suppression device according to claim 2, characterized in that: A limiting plate (203) is fixedly connected to the middle of one side of the opening (2), and will abut against it when the mounting plate (201) rotates 180 degrees. The connecting line of the controller (3) is connected from its side wall to the inside of the equipment box (1).

5. The novel DC bias suppression device according to claim 1, characterized in that: One end of the electrical connection base (5) is electrically connected to a neutral point connector line (6), and the other end of the electrical connection base (5) extends to the outside of the equipment box (1) through a connecting wire.

6. The novel DC bias suppression device according to claim 1, characterized in that: The resistor (7) has an insulating shell on its outer side, which is a plate-shaped design.

7. The novel DC bias suppression device according to claim 5, characterized in that: The translational conductive structure includes two T-shaped conductive heads (12), and the two T-shaped conductive heads (12) at the lower ends of the resistor (7) and the n-shaped conductor (8) are located at the positive and negative poles, respectively. The upper surface of the electrical connection base (5) is provided with several sets of T-shaped slots (13) that are adapted to the T-shaped conductive heads (12). Each T-shaped slot (13) has an electrical connection piece (14) installed at its end that is electrically connected to the T-shaped conductive head (12).

8. The novel DC bias suppression device according to claim 7, characterized in that: The number of T-shaped slots (13) in each group is four, and the four T-shaped slots (13) are distributed in pairs on both sides of the electrical connection base (5). The two T-shaped slots (13) on the same side correspond to the positive or negative poles of the lower end of the resistor (7) and the n-shaped conductor (8), respectively. The positive and negative poles of the two adjacent groups of T-shaped slots (13) are electrically connected, and the connecting wire and the neutral point connector wire (6) are electrically connected to the positive and negative poles in the T-shaped slots (13), respectively.

9. The novel DC bias suppression device according to claim 1, characterized in that: The drive structure includes two slide rods (10) fixedly connected to the side wall of the resistor (7). A fixed sleeve (9) is fixedly connected to the rear side wall of the equipment box (1) and is slidably connected to the two slide rods (10). An electric push rod (11) is also fixedly installed on the rear side wall of the equipment box (1). The movable end of the electric push rod (11) is fixedly connected to the middle of the side wall of the resistor (7), and the input end of the electric push rod (11) is electrically connected to the output end of the controller (3).

10. The novel DC bias suppression device according to claim 1, characterized in that: The heat dissipation structure (4) includes two heat dissipation holes (401) opened on the front side wall of the equipment box (1). A cooling fan (402) is fixedly installed in each of the two heat dissipation holes (401). An air exchange groove (403) is opened on the rear side wall of the equipment box (1). A filter screen is provided in both the heat dissipation holes (401) and the air exchange groove (403). The input end of the cooling fan (402) is electrically connected to the output end of the controller (3).

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