A traction substation busbar fast protection structure

Abstract

The utility model provides a traction substation bus rapid protection structure relates to traction power supply system protection equipment technical field, including protection structure bottom plate, the top of protection structure bottom plate is provided with quick disconnect mechanism, quick disconnect mechanism includes vertical guide rail, vertical guide rail sets up in the top of protection structure bottom plate, the side surface fixed connection of vertical guide rail has the mounting ring, the bottom surface fixed connection of mounting ring has repulsion coil, the inside slide connection of vertical guide rail has mobile sliding block. This traction substation bus rapid protection structure, utilize vertical guide rail to make mobile sliding block slide conveniently, because fixed repulsion coil in the side of vertical guide rail, produce instantaneous electromagnetic repulsion through repulsion coil electrification, push the sliding magnet and move fast downward, make the incoming line end bus and outgoing line end bus in vacuum arc chamber disconnect, extinguish electric arc in vacuum environment, total fault isolation time is less, satisfies traction power supply rapid protection demand.

Description

Technical Field

[0001] This utility model relates to a busbar protection structure, specifically a fast protection structure for a traction substation busbar, belonging to the technical field of traction power supply system protection equipment. Background Technology

[0002] The traction substation busbar is the core conductive circuit connecting the main transformer and the feeder switch. It is responsible for the distribution of electrical energy to the railway traction load. Its faults must be isolated instantly, otherwise it will lead to a large-scale power outage, thereby affecting the efficiency of railway transportation and even causing equipment burnout.

[0003] The existing busbar protection structure of traction substations generally relies on the traditional solution of "relay protection device + vacuum circuit breaker". The substation busbar is de-energized by the cooperation of relay protection device and vacuum circuit breaker. However, the judgment time of relay protection is relatively long, and the mechanical opening time of circuit breaker is even longer. As a result, the total fault isolation time far exceeds the fast protection requirements of traction power supply system, which can easily expand the fault range and cause problems such as burning of busbar insulators and main transformer windings.

[0004] Therefore, a fast protection structure for the busbar of a traction substation is proposed here. Utility Model Content

[0005] This invention proposes a fast protection structure for the busbar of a traction substation to solve the problem of slow fault response in the prior art.

[0006] This utility model is achieved through the following technical solution: a fast protection structure for a traction substation busbar, including a protection structure base plate, and a fast disconnection mechanism is provided above the protection structure base plate; The quick disconnect mechanism includes a vertical guide rail, which is positioned above the base plate of the protective structure. A mounting ring is fixedly connected to one side of the vertical guide rail, and a repulsive coil is fixedly connected to the bottom surface of the mounting ring. A movable slider is slidably connected inside the vertical guide rail. A breaking spring is fixedly connected to the inner top wall of the vertical guide rail, and the bottom end of the breaking spring is fixedly connected to the upper surface of the movable slider. A sliding magnet is fixedly connected to one side of the movable slider, and a vacuum interrupter box is fixedly connected to the bottom surface of the sliding magnet. An inlet busbar is snapped into the inside of the vacuum interrupter box, and an outlet busbar is snapped into the inside of the vertical guide rail. One end of the outlet busbar passes through the vacuum interrupter box and connects to one end of the inlet busbar. A movable adjustment component is provided on one side of the quick disconnect mechanism, and an auxiliary component is provided below the quick disconnect mechanism.

[0007] The movable adjustment assembly includes two support columns. The bottom end of each support column is fixedly connected to the upper surface of the protective structure base plate. The top ends of the two support columns are fixedly connected to an insulating crossbeam. A horizontal guide rail is fixedly connected to one side of the insulating crossbeam. One side of the horizontal guide rail is in contact with one side of the vertical guide rail. A limit sliding block is fixedly connected to the other side of the vertical guide rail. The limit sliding block is slidably connected inside the horizontal guide rail.

[0008] The auxiliary component includes two sets of movable legs. The top of each set of movable legs is fixedly connected to the bottom surface of the protective structure base plate, and the bottom of each set of movable legs is fixedly connected to a caster wheel.

[0009] Two reinforcing rods are fixedly connected to the outer surface of each support column, and the bottom end of each set of reinforcing rods is fixedly connected to the upper surface of the protective structure base plate.

[0010] Each of the support columns has a reinforcing plate fixedly connected to its outer surface, and the bottom surface of each reinforcing plate is fixedly connected to the upper surface of the protective structure base plate.

[0011] A stabilizing ring is fitted onto the outer surface of the breaking spring, and the bottom surface of the stabilizing ring is fixedly connected to the upper surface of the movable slider.

[0012] This utility model provides a fast protection structure for the busbar of a traction substation, which has the following beneficial effects: This traction substation busbar fast protection structure utilizes a vertical guide rail to facilitate the sliding of a movable slider and a sliding magnet, which in turn moves the vacuum interrupter box up and down. A repulsion coil is fixed to one side of the vertical guide rail via an mounting ring. When the repulsion coil is energized, it generates an instantaneous electromagnetic repulsion force, propelling the sliding magnet downwards rapidly. This disconnects the incoming and outgoing busbars within the vacuum interrupter box, extinguishing the arc in a vacuum environment. The total fault isolation time is reduced, thus meeting the requirements for fast protection of traction power supply.

[0013] This traction substation busbar fast protection structure can use two support columns to support the insulated crossbeam at the required height. The surface of the crossbeam is equipped with a horizontal guide rail. The limit sliding block fixed on one side of the vertical guide rail slides within the horizontal guide rail. It can be used for adaptive sliding positioning of the connection between the incoming busbar and the outgoing busbar, thereby enabling fast protection for different traction power supplies. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the base plate of the protective structure of this utility model; Figure 2 This is a schematic diagram of the vertical guide rail of this utility model; Figure 3This is a bottom view of the vertical guide rail structure of this utility model; Figure 4 This is a rear view schematic diagram of the movable slider of this utility model.

[0015] Explanation of reference numerals in the attached figures 1. Protect the structural base plate; 2. Quick disconnection mechanism; 201. Vertical guide rail; 202. Mounting ring; 203. Repulsion coil; 204. Breaking spring; 205. Moving slider; 206. Vacuum interrupter box; 207. Sliding magnet; 208. Inlet busbar; 209. Outlet busbar; 3. Moving and adjusting components; 301. Support column; 302. Insulating crossbeam; 303. Horizontal guide rail; 304. Limiting sliding block; 4. Auxiliary components; 401. Reinforcing bar; 402. Reinforcing plate; 403. Movable leg; 404. Casters; 5. Stabilizing loop. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0017] Please see Figures 1-4 This utility model embodiment provides a fast protection structure for the busbar of a traction substation, including a protection structure base plate 1, and a fast disconnection mechanism 2 is provided above the protection structure base plate 1; Please refer to this carefully. Figure 1 , Figure 2 , Figure 3 and Figure 4 The quick disconnect mechanism 2 includes a vertical guide rail 201, which is positioned above the base plate 1 of the protective structure. A mounting ring 202 is fixedly connected to one side of the vertical guide rail 201, and a repulsion coil 203 is fixedly connected to the bottom surface of the mounting ring 202. The repulsion coil 203 is a coil structure that generates magnetism when energized. A movable slider 205 is slidably connected inside the vertical guide rail 201, and a breaking spring 204 is fixedly connected to the inner top wall of the vertical guide rail 201. The bottom end of the breaking spring 204 is fixedly connected to the upper surface of the movable slider 205, and a stabilizing ring 5 is sleeved on the outer surface of the breaking spring 204. The bottom surface of the stabilizing ring 5 is fixedly connected to the upper surface of the movable slider 205. The stabilizing ring 5 is fixed to the outside of the breaking spring 204 to guide the extension and retraction direction of the breaking spring 204 and improve the extension and retraction stability of the breaking spring 204.

[0018] Please refer to this carefully. Figure 1 , Figure 2 , Figure 3 and Figure 4 A sliding magnet 207 is fixedly connected to one side of the movable slider 205, and a vacuum interrupter box 206 is fixedly connected to the bottom surface of the sliding magnet 207. The vacuum interrupter box 206 is the core component of the high-voltage switchgear. By utilizing the insulation and arc-extinguishing characteristics of the high-vacuum environment, it realizes the safe disconnection and connection of the high-voltage circuit. The inside of the vacuum interrupter box 206 is fitted with the inlet busbar 208, and the inside of the vertical guide rail 201 is fitted with the outlet busbar 209. One end of the outlet busbar 209 passes through the vacuum interrupter box 206 and connects to one end of the inlet busbar 208. Please refer to this carefully. Figure 1 A movable adjustment assembly 3 is provided on one side of the quick disconnect mechanism 2, and an auxiliary assembly 4 is provided below the quick disconnect mechanism 2. The movable adjustment assembly 3 includes two support columns 301. The bottom end of each support column 301 is fixedly connected to the upper surface of the protection structure base plate 1. Two reinforcing rods 401 are fixedly connected to the outer surface of each support column 301. The bottom end of each set of reinforcing rods 401 is fixedly connected to the upper surface of the protection structure base plate 1. The reinforcing rods 401 are used to reinforce the two sides of the higher support column 301, thereby improving the support stability of the traction substation busbar quick protection structure.

[0019] Please refer to this carefully. Figure 1 Each support column 301 has a reinforcing plate 402 fixedly connected to its outer surface. The bottom surface of each reinforcing plate 402 is fixedly connected to the upper surface of the protection structure base plate 1. The bottom connection of the support column 301 is reinforced by the reinforcing plate 402, thereby further improving the support stability of the traction substation busbar fast protection structure.

[0020] Please refer to this carefully. Figure 1 , Figure 2 and Figure 3 An insulating crossbeam 302 is fixedly connected to the top of the two support columns 301. A horizontal guide rail 303 is fixedly connected to one side of the insulating crossbeam 302. One side of the horizontal guide rail 303 is in contact with one side of the vertical guide rail 201. A limiting sliding block 304 is fixedly connected to the other side of the vertical guide rail 201. The limiting sliding block 304 is slidably connected inside the horizontal guide rail 303. By using the limiting sliding block 304 to slide inside the horizontal guide rail 303, the vertical guide rail 201 can move horizontally along the horizontal guide rail 303, so as to facilitate the protection of the traction substation busbar at different positions.

[0021] Please refer to this carefully. Figure 1The auxiliary component 4 includes two sets of movable legs 403. The top of each set of movable legs 403 is fixedly connected to the bottom surface of the protective structure base plate 1. The bottom of each set of movable legs 403 is fixedly connected to a caster wheel 404. The two sets of movable legs 403 and the caster wheel 404 form the movable structure of the quick protection structure, so as to facilitate the quick protection structure to be moved to the required position for use.

[0022] In use, when this utility model is needed to quickly protect the busbar of a traction substation, the quick protection structure is first placed manually on a horizontal surface. The two sets of movable legs 403 and casters 404 fixed to the base plate 1 of the protection structure form the moving structure, allowing it to be easily moved to the desired position. The incoming busbar 208 and the outgoing busbar 209 are then manually secured to the vacuum interrupter box 206 and the vertical guide rail 2. Inside the 01, one end of the incoming busbar 208 and the outgoing busbar 209 can be connected and installed inside the vacuum interrupter box 206. Two support columns 301 are used to fix the insulating crossbeam 302 to the upper surface of the protection structure base plate 1. A horizontal guide rail 303 is fixed on one side of the insulating crossbeam 302. The limiting sliding block 304 fixed on one side of the vertical guide rail 201 can slide in the horizontal guide rail 303. The quick protection structure can be adjusted to be suitable for quick protection of traction substation busbars of different sizes and positions. When a phase-to-phase or ground short circuit occurs on the traction substation busbar consisting of the incoming busbar 208 and the outgoing busbar 209, instantaneous isolation is required. This is achieved by energizing the repulsion coil 203 fixed under the mounting ring 202 on one side of the vertical guide rail 201. The energized repulsion coil 203 generates an instantaneous electromagnetic repulsion. Since a sliding slider 205 slides within the vertical guide rail 201, and a tensioned breaking spring 204 is fixed between the sliding slider 205 and the vertical guide rail 201, the generated repulsion repels the sliding magnet 207 fixed on one side of the sliding slider 205. This allows the breaking spring 204 to continue to stretch, causing the vacuum interrupter box 206 to move downwards with the incoming busbar 208. This separates the incoming busbar 208 and the outgoing busbar 209 within the vacuum interrupter box 206, extinguishing the arc in a vacuum environment. The total fault isolation time is short, meeting the requirements for rapid protection of traction power supply.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fast protection structure for a traction substation busbar, comprising a protection structure base plate (1), characterized in that: A quick disconnect mechanism (2) is provided above the bottom plate (1) of the protective structure. The quick disconnect mechanism (2) includes a vertical guide rail (201), which is located above the protective structure base plate (1). A mounting ring (202) is fixedly connected to one side of the vertical guide rail (201), and a repulsion coil (203) is fixedly connected to the bottom surface of the mounting ring (202). A sliding block (205) is slidably connected inside the vertical guide rail (201), and a breaking spring (204) is fixedly connected to the inner top wall of the vertical guide rail (201). The bottom end of the breaking spring (204) The upper surface of the movable slider (205) is fixedly connected to the movable slider (205), and a sliding magnet (207) is fixedly connected to one side of the movable slider (205). A vacuum interrupter box (206) is fixedly connected to the bottom surface of the sliding magnet (207). An inlet busbar (208) is snapped into the inside of the vacuum interrupter box (206), and an outlet busbar (209) is snapped into the inside of the vertical guide rail (201). One end of the outlet busbar (209) passes through the vacuum interrupter box (206) and connects to one end of the inlet busbar (208). A movable adjustment component (3) is provided on one side of the quick disconnect mechanism (2), and an auxiliary component (4) is provided below the quick disconnect mechanism (2).

2. The fast protection structure for a traction substation busbar according to claim 1, characterized in that: The movable adjustment assembly (3) includes two support columns (301). The bottom end of each support column (301) is fixedly connected to the upper surface of the protective structure base plate (1). The top ends of the two support columns (301) are fixedly connected to an insulating crossbeam (302). A horizontal guide rail (303) is fixedly connected to one side of the insulating crossbeam (302). One side of the horizontal guide rail (303) is in contact with one side of the vertical guide rail (201). A limiting sliding block (304) is fixedly connected to the other side of the vertical guide rail (201). The limiting sliding block (304) is slidably connected inside the horizontal guide rail (303).

3. The fast protection structure for a traction substation busbar according to claim 1, characterized in that: The auxiliary component (4) includes two sets of movable legs (403). The top of each set of movable legs (403) is fixedly connected to the bottom surface of the protective structure base plate (1), and the bottom of each set of movable legs (403) is fixedly connected to a caster wheel (404).

4. The fast protection structure for a traction substation busbar according to claim 2, characterized in that: Two reinforcing rods (401) are fixedly connected to the outer surface of each of the support columns (301), and the bottom end of each set of reinforcing rods (401) is fixedly connected to the upper surface of the protective structure base plate (1).

5. A fast protection structure for a traction substation busbar according to claim 2, characterized in that: Each of the support columns (301) has a reinforcing plate (402) fixedly connected to its outer surface, and the bottom surface of each reinforcing plate (402) is fixedly connected to the upper surface of the protective structure base plate (1).

6. The fast protection structure for a traction substation busbar according to claim 1, characterized in that: The outer surface of the breaking spring (204) is fitted with a stabilizing ring (5), and the bottom surface of the stabilizing ring (5) is fixedly connected to the upper surface of the movable slider (205).

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