CN212625119U

CN212625119U - Transformer neutral point connecting system

Info

Publication number: CN212625119U
Application number: CN202021650828.9U
Authority: CN
Inventors: 李永双; 邓长红; 孙清华; 陈海焱; 王伟刚; 葛扬; 关沛; 郝为瀚; 郭金川; 孔志达; 韩毅博; 刘晓瑞; 夏泠风; 王丽杰; 杨金根; 朱大鹏; 丁晓飞; 冯川; 骆玲
Original assignee: China Energy Intelligence New Technology Industry Development Co ltd; China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd; Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group; China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp; Electric Power Planning and Engineering Institute Co Ltd
Current assignee: China Energy Intelligence New Technology Industry Development Co ltd; China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd; Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group; China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp; Super High Transmission Co of China South Electric Net Co Ltd; Electric Power Planning and Engineering Institute Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-02-26
Anticipated expiration: 2030-08-10

Abstract

The utility model provides a transformer neutral point connecting system; wherein, this transformer neutral point connected system includes: three single-phase transformers; the three single-phase transformers comprise a middle phase transformer and two side phase transformers; the middle phase transformer is provided with a tubular bus, the two side phase transformers are provided with corresponding cables, and the cables are connected with the tubular bus. Through this application, avoided adopting one to run through A, B, C three single-phase transformer's tub of generating line's mode, saved the space between the transformer, can be in order to arrange high voltage distribution device between the transformer, if start-up loop equipment.

Description

Transformer neutral point connecting system

Technical Field

The utility model relates to an electric power field, concretely relates to transformer neutral point connected system.

Background

As shown in fig. 1, in a conventional converter station project, a neutral point bushing of each single-phase converter transformer is connected to a neutral point bus through a flexible conductor, and the neutral point bus is grounded through a special grounding wire. The prior art uses a tubular bus which penetrates A, B, C three single-phase transformers to realize the connection among the transformers. However, in this prior art, since the tubular bus bars penetrating A, B, C three single-phase transformers exist, it is not possible to arrange the starting circuit equipment between the single-phase transformers, i.e. it is difficult to arrange other high-voltage distribution devices besides the transformers.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a transformer neutral point connection system, which can solve the problem that in the prior art, starting loop equipment cannot be arranged between single-phase transformers due to the fact that each transformer is connected through a pipe bus penetrating A, B, C three single-phase transformers.

The application provides a transformer neutral point connected system includes: three single-phase transformers; the three single-phase transformers comprise a middle phase transformer and two side phase transformers; the middle phase transformer is provided with a tubular bus, the two side phase transformers are respectively provided with corresponding cables, and the cables are connected with the tubular bus.

Optionally, the transformer neutral connection system further includes: a first flexible wire; the tubular bus is connected with the intermediate phase transformer through the first flexible conductor.

Optionally, the transformer system further comprises: a second flexible wire; the cable is connected with the side phase transformer through the second flexible conductor.

Optionally, the tubular busbar is connected to ground by a ground line.

Optionally, the three single-phase transformers comprise: the phase transformer comprises a phase A transformer, a phase B transformer and a phase C transformer; the phase B transformer is an intermediate phase transformer.

Three single-phase transformer in the transformer neutral point connected system of this application, only need set up the tubular bus on the middle phase transformer, the neutral point of other two transformers meets in this tubular bus through dedicated cable separately respectively, thereby avoided adopting a mode that runs through A, B, C three single-phase transformer's tubular bus, the space between the transformer has been saved, can be in order to arrange high voltage distribution device between the transformer, if start-up loop equipment, solved and run through A, B, C three single-phase transformer's tubular bus in order to connect each transformer among the prior art, lead to unable problem of arranging start-up loop equipment between each single-phase transformer.

Drawings

FIG. 1 is a schematic diagram of a prior art converter transformer neutral connection;

fig. 2 is a schematic structural diagram of a transformer neutral point connection system according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the audio so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The present application provides a transformer system, fig. 2 is a schematic structural diagram of a transformer neutral point connection system according to an embodiment of the present application, and as shown in fig. 2, the system includes: three single-phase transformers; wherein, the three single-phase transformers comprise a middle phase transformer (11) and two side phase transformers (12);

the middle phase transformer (11) is provided with a tubular bus (111), the two side phase transformers (12) are respectively provided with corresponding cables (121), and the cables (121) are connected with the tubular bus (111).

Optionally, the three single-phase transformers in the embodiment of the present application include: phase A transformer, phase B transformer and phase C transformer. The phase B transformer is a middle phase transformer, and the phase A transformer and the phase C transformer are side phase transformers.

Optionally, the transformer neutral connection system further comprises: a first flexible conductor (112); the tubular bus (111) is connected with the intermediate phase transformer (11) through a first flexible conductor (112).

Optionally, the transformer system further comprises: a second flexible conductor (122); the cable (121) is connected with the side phase transformer (12) through a second flexible conductor (122).

The first flexible conductor and the second flexible conductor are connected to a neutral point sleeve bus of the intermediate phase transformer, so that the phenomenon that the sleeve is stressed too much can be avoided, the negative influence of the heating of the transformer on a cable can be avoided, and the influence of the vibration of the transformer on the connection reliability can be avoided.

Optionally, the tubular busbar (121) is connected to ground by a ground line (123).

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transformer neutral connection system, comprising: three single-phase transformers; the three single-phase transformers comprise a middle phase transformer and two side phase transformers;

the middle phase transformer is provided with a tubular bus, the two side phase transformers are respectively provided with corresponding cables, and the cables are connected with the tubular bus.

2. The transformer neutral connection system of claim 1, further comprising: a first flexible wire; the tubular bus is connected with the intermediate phase transformer through the first flexible conductor.

3. The transformer neutral connection system of claim 1, further comprising: a second flexible wire; the cable is connected with the side phase transformer through the second flexible conductor.

4. The transformer neutral connection system of claim 1, wherein the tubular busbar is connected to ground by a ground line.

5. The transformer neutral connection system of claim 1, wherein the three single phase transformers comprise: the phase transformer comprises a phase A transformer, a phase B transformer and a phase C transformer; the phase B transformer is an intermediate phase transformer.