CN219105904U

CN219105904U - Structure for reducing corona discharge of sleeve of 750kV transformer

Info

Publication number: CN219105904U
Application number: CN202222556438.0U
Authority: CN
Inventors: 唐滔; 胡振兴; 杨毅伟
Original assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Current assignee: Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-05-30
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a structure for reducing 750kV transformer bushing corona discharge, which relates to the technical field of power plants, substations and converter stations and comprises transformer bushings, wherein transformer bushing wiring terminal boards are further fixed at the tops of the transformer bushings, terminals are arranged at two ends of each transformer bushing wiring terminal board, an inverted L-shaped transition wiring board is fixed through the terminals, horizontal double-wire equipment clamps and fixed mounting plates are fixed at the tops of the two inverted L-shaped transition wiring boards, equalizing ring fixing pipes are arranged at two ends of the fixed mounting plates, upper equalizing rings are arranged on the fixed mounting plates through the equalizing ring fixing pipes, and the L-shaped transition wiring boards and the double-wire equipment clamps are located in annular projections of the upper equalizing rings in the vertical direction. The utility model reduces the corona discharge of the sleeve of the 750kV transformer, reduces the influence of the corona discharge on electrical equipment, reduces the electric energy loss and ensures the safe and reliable operation of the equipment.

Description

Structure for reducing corona discharge of sleeve of 750kV transformer

Technical Field

The utility model relates to the technical field of power plants, substations and converter stations, in particular to a structure for reducing corona discharge of a 750kV transformer bushing.

Background

Corona discharge gradually damages the insulating performance of electrical equipment, causes corona power loss, radio interference, noise interference and the like, and corona noise has serious influence on professional health of operators, so that the corona noise has become a focus problem of attention of operators, and when designing power distribution devices with the voltage level of 750kV and above, reducing the corona discharge of the power distribution devices has become one of the problems to be considered. The flexible conductor of the power distribution device with the voltage of 750kV and above adopts four split conductors, and the flexible conductor and the transformer wiring terminal board are connected by adopting two pairs of double-conductor equipment clamps. Most of the transformer binding post boards are of a double-terminal U-shaped structure, when the outgoing lines are in a horizontal direction, the outgoing lines are subject to a transformer sleeve equalizing ring structure, and the double-wire equipment wire clamp cannot be wrapped in the equalizing ring, so that corona discharge phenomenon occurs at the connection part of the equipment wire clamp and the transformer binding post. Therefore, the connection structure of the wiring terminal board and the four-split conductor is researched on the basis of the existing transformer bushing so as to reduce the influence of corona discharge.

Disclosure of Invention

The utility model aims at: the utility model provides a reduce 750kV transformer bushing corona discharge's structure, under the circumstances that does not change transformer bushing inherent structure, increase transition wiring board and equalizer ring, wrap up transition wiring board and two pairs of double wire equipment fastener between newly increasing equalizer ring and transformer bushing upper portion equalizer ring, through structural optimization and analog simulation, can effectively reduce the changeover department corona discharge, solved the problem among the background art.

The technical scheme adopted by the utility model is as follows:

the utility model relates to a structure for reducing 750kV transformer bushing corona discharge, which comprises transformer bushings, wherein a horizontal middle equalizing ring and a lower equalizing ring are arranged on the transformer bushings, transformer bushing wiring terminal plates are further fixed at the tops of the transformer bushings, terminals are arranged at two ends of each transformer bushing wiring terminal plate, an inverted L-shaped transition wiring plate is respectively fixed at two ends of each transformer bushing wiring terminal plate through the terminals, horizontal double-wire equipment clamps and fixed mounting plates are fixed at the tops of the two inverted L-shaped transition wiring plates, equalizing ring fixing pipes are arranged at two ends of the fixed mounting plates, upper equalizing rings are arranged on the fixed mounting plates through the equalizing ring fixing pipes, the transition wiring plates and the double-wire equipment clamps are located in annular projections of the upper equalizing rings in the vertical direction, and the double-wire equipment clamps and the transition wiring plates are located between the upper equalizing rings and the middle equalizing rings.

Furthermore, the two inverted L-shaped transition wiring boards are oppositely arranged to form an inverted U-shape, and the double-wire equipment wire clamp and the fixed mounting plate are fixed at the top of the inverted U-shaped transition wiring board through bolts.

Further, one end of the double-wire equipment wire clamp is connected with the flexible wire, the other end of the double-wire equipment wire clamp is a wiring terminal, and the wiring terminal of the double-wire equipment wire clamp is fixed on an inverted L-shaped transition wiring board through a bolt.

Further, two pairs of double-wire equipment clamps are arranged, the two pairs of double-wire equipment clamps are fixedly arranged on the upper side and the lower side of the top of the inverted L-shaped transition wiring board through wiring terminals respectively, and the double-wire equipment clamps on the upper side of the transition wiring board penetrate out from between adjacent equalizing ring fixing pipes and then are connected with flexible wires.

Furthermore, a reinforcing rib plate is arranged on the outer side of the connecting terminal of the double-wire equipment wire clamp.

Further, the fixed mounting plate is fixedly mounted between the upper surface of the top of the inverted L-shaped transition wiring board and the wiring terminal of the double-wire equipment wire clamp through bolts.

Further, the outer diameter sizes of the upper equalizing ring, the middle equalizing ring and the lower equalizing ring are consistent, and the upper equalizing ring, the middle equalizing ring and the lower equalizing ring are parallel to each other.

In summary, by adopting the technical scheme, the utility model has the beneficial effects that:

the utility model discloses a structure for reducing corona discharge of a 750kV transformer bushing, which is characterized in that an L-shaped transition wiring board and an upper equalizing ring are added under the condition of not changing the existing structure of the transformer bushing, and an L-shaped transition wiring board and a double-wire equipment wire clamp are wrapped between the upper equalizing ring and the middle equalizing ring of the transformer bushing so as to reduce corona discharge at the joint of wiring terminals, reduce the influence of the corona discharge on electrical equipment, reduce electric energy loss and ensure safe and reliable operation of the equipment.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present utility model, and should not be considered as limiting the scope, for those skilled in the art, without performing creative efforts, other related drawings may be obtained according to the drawings, where the proportional relationships of the components in the drawings in the present specification do not represent the proportional relationships in actual material selection design, and are merely schematic diagrams of structures or positions, where:

FIG. 1 is a schematic diagram of a cross-sectional connection between a transformer bushing and a two-wire device clamp according to the present utility model;

FIG. 2 is a schematic diagram of another cross-sectional configuration of a transformer bushing and two-wire device clamp connection according to the present utility model;

fig. 3 is a top view of the present utility model.

Reference numerals illustrate: 1-transformer bushing, 2-middle equalizing ring, 3-lower equalizing ring, 4-transformer bushing wiring terminal board, 41-terminal, 5-transition wiring board, 6-double-wire equipment wire clamp, 61-wiring terminal, 62-reinforcing rib plate, 7-fixed mounting plate, 8-equalizing ring fixed pipe and 9-upper equalizing ring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

The present utility model will be described in detail with reference to the accompanying drawings, in which the present embodiment only illustrates a specific embodiment of the security management process for one item.

Example 1

The utility model discloses a structure for reducing 750kV transformer bushing corona discharge, which comprises a transformer bushing 1, wherein a horizontal middle equalizing ring 2 and a lower equalizing ring 3 are arranged on the transformer bushing 1, a transformer bushing wiring terminal board 4 is also fixed at the top of the transformer bushing 1, terminals 41 are arranged at two ends of the transformer bushing wiring terminal board 4, an inverted L-shaped transition wiring board 5 is respectively fixed at two ends of the transformer bushing wiring terminal board 4 through the terminals 41, a horizontal double-wire device clamp 6 and a fixed mounting plate 7 are fixed at the tops of the two inverted L-shaped transition wiring boards 5, equalizing ring fixing pipes 8 are arranged at two ends of the fixed mounting plate 7, an upper equalizing ring 9 is arranged on the fixed mounting plate 7 through the equalizing ring fixing pipes 8, the transition wiring board 5 and the double-wire device clamp 6 are positioned in annular projections of the upper equalizing ring 9 in the vertical direction, and the double-wire device clamp 6 and the transition wiring board 5 are positioned between the upper equalizing ring 9 and the middle equalizing ring 2.

In the transformer bushing structure of the utility model, under the condition of not changing the inherent structure of the transformer bushing, the transformer bushing wiring terminal board 4 at the top of the transformer bushing 1 is changed in direction, namely, the terminals 41 at the two ends of the transformer bushing wiring terminal board 4 are changed into vertical direction, so that the terminals 41 are fixedly connected with the lower ends of the inverted L-shaped transition wiring board 5 through bolts, as shown in fig. 1, the transition wiring board 5 is made of copper-aluminum materials, the top of the inverted L-shaped transition wiring board 5 is fixedly connected with the double-wire equipment clamp 6 and the fixed mounting plate 7 through bolts, so that the double-wire equipment clamp 6 is horizontally arranged and is used for connecting flexible wires, the fixed mounting plate 7 is used for supporting and fixing the upper equalizing ring 9 through equalizing ring fixing pipes 8 at the two ends, and the upper equalizing ring 9 is positioned above the double-wire equipment clamp 6, as shown in fig. 1-2, the L-shaped transition wiring board 5 and the double-wire equipment clamp 6 are wrapped between the upper equalizing ring 9 and the middle equalizing ring 2, the connection part of the terminals 41 of the transformer bushing terminal board 4 can be reduced, further, the corona discharge effect on electrical equipment can be reduced, the reliable operation and the safety loss of the corona discharge equipment can be ensured.

Example two

This example is a further illustration of the present utility model.

As shown in fig. 1 to 3, in the first preferred embodiment of the present utility model, the two inverted L-shaped transition wiring boards 5 are disposed opposite to each other to form an inverted U-shape, and the two wire device clamp 6 and the fixing mounting plate 7 are fixed to the top of the inverted U-shaped transition wiring board 5 by bolts.

Preferably, one end of the double-wire equipment wire clamp 6 is connected with a flexible wire, the other end of the double-wire equipment wire clamp 6 is provided with a wiring terminal 61, and the wiring terminal 61 of the double-wire equipment wire clamp 6 is fixed on the inverted L-shaped transition wiring board 5 through a bolt.

Preferably, two pairs of double-wire equipment clamps 6 are provided, the two pairs of double-wire equipment clamps 6 are fixedly installed on the upper side and the lower side of the top of the inverted L-shaped transition wiring board 5 through wiring terminals 61 respectively, wherein the double-wire equipment clamps 6 on the upper side of the transition wiring board 5 penetrate out from between adjacent equalizing ring fixing pipes 8 and then are connected with flexible wires.

Preferably, a reinforcing rib plate 62 is arranged on the outer side of the connecting terminal 61 of the double-wire equipment wire clamp 6.

Preferably, the fixed mounting plate 7 is fixedly mounted between the upper surface of the inverted L-shaped transition wiring board 5 and the wiring terminal 61 of the two-wire device clamp 6 by bolts.

Preferably, the outer diameter sizes of the upper equalizing ring 9 and the middle equalizing ring 2 and the lower equalizing ring 3 are consistent, and the upper equalizing ring 9, the middle equalizing ring 2 and the lower equalizing ring 3 are parallel to each other.

In this embodiment, as shown in fig. 1-2, two inverted L-shaped transition connection plates 5 are spliced to form an inverted U-shape, and two pairs of double-wire device wire clamps 6 are respectively fixed on the upper and lower surfaces (upper and lower sides) of the top of the inverted U-shaped transition connection plate 5 through connection terminals 61 thereof, reinforcing rib plates 62 are arranged on the outer sides of the connection terminals 61 of the double-wire device wire clamps 6, so that connection between the double-wire device wire clamps 6 and the transition connection plate 5 can be reinforced, strength of the double-wire device wire clamps 6 is ensured, the other ends of the two pairs of double-wire device wire clamps 6 are used for connecting 4 split flexible wires, wherein one end, connected with a wire, of the double-wire device wire clamps 6 on the upper side of the L-shaped transition connection plate 5 passes through an adjacent equalizing ring fixing tube 8, and the sizes of the upper equalizing ring 9, the middle equalizing ring 2 and the lower equalizing ring 3 are identical, the height and the sizes of the upper equalizing ring 9 are optimized, the connection structures of the double-wire device wire clamps 6 and 4 split wires are changed, the L-shaped transition connection plate 5 and the double-wire device wire clamps 6 can be wrapped between the upper portion 9 and the middle portion 9 of a transformer bushing 1 and the lower equalizing ring 2, the electric potential loss can be reduced, and the electric loss can be reduced by simulating the equalizing ring 4, and the electric loss can be reduced by the equalizing ring and the electric loss can be reduced.

The above description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions that are not creatively contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a reduce 750kV transformer bushing corona discharge's structure, includes transformer bushing (1), install horizontal middle part equalizer ring (2) and lower part equalizer ring (3) on transformer bushing (1), its characterized in that: the transformer bushing is characterized in that a transformer bushing wiring terminal board (4) is further fixed at the top of the transformer bushing (1), terminals (41) are arranged at two ends of the transformer bushing wiring terminal board (4), an inverted L-shaped transition wiring board (5) is fixed at two ends of the transformer bushing wiring terminal board (4) through the terminals (41), a horizontal double-wire equipment wire clamp (6) and a fixed mounting plate (7) are fixed at the tops of the two inverted L-shaped transition wiring boards (5), an equalizing ring fixing pipe (8) is arranged at two ends of the fixed mounting plate (7), an upper equalizing ring (9) is arranged at the fixed mounting plate (7) through the equalizing ring fixing pipe (8), the transition wiring board (5) and the double-wire equipment wire clamp (6) are located in annular projections of the upper equalizing ring (9) in the vertical direction, and the double-wire equipment wire clamp (6) and the transition wiring board (5) are located between the upper equalizing ring (9) and the middle equalizing ring (2).

2. A structure for reducing corona discharge of a 750kV transformer bushing as defined in claim 1, wherein: the two inverted L-shaped transition wiring boards (5) are opposite to each other to form an inverted U-shaped, and the double-wire equipment wire clamp (6) and the fixed mounting plate (7) are fixed at the top of the inverted U-shaped transition wiring boards (5) through bolts.

3. A structure for reducing corona discharge of a 750kV transformer bushing as defined in claim 2, wherein: the flexible wire is connected to one end of the double-wire equipment wire clamp (6), a wiring terminal (61) is arranged at the other end of the double-wire equipment wire clamp (6), and the wiring terminal (61) of the double-wire equipment wire clamp (6) is fixed on an inverted L-shaped transition wiring board (5) through bolts.

4. A structure for reducing corona discharge of a 750kV transformer bushing as defined in claim 3, wherein: the two pairs of double-wire equipment clamps (6) are fixedly arranged on the upper side and the lower side of the top of the inverted L-shaped transition wiring board (5) through wiring terminals (61), wherein the double-wire equipment clamps (6) on the upper side of the transition wiring board (5) penetrate out from between adjacent equalizing ring fixing pipes (8) and then are connected with flexible wires.

5. The structure for reducing corona discharge of a bushing of a 750kV transformer of claim 4, wherein: and a reinforcing rib plate (62) is arranged on the outer side of a connecting terminal (61) of the double-wire equipment wire clamp (6).

6. The structure for reducing corona discharge of a bushing of a 750kV transformer of claim 4, wherein: the fixed mounting plate (7) is fixedly mounted between the upper surface of the top of the inverted L-shaped transition wiring board (5) and the wiring terminal (61) of the double-wire equipment wire clamp (6) through bolts.

7. A structure for reducing corona discharge of a 750kV transformer bushing as defined in claim 1, wherein: the outer diameter sizes of the upper equalizing ring (9) and the middle equalizing ring (2) and the lower equalizing ring (3) are consistent, and the upper equalizing ring (9), the middle equalizing ring (2) and the lower equalizing ring (3) are parallel to each other.