CN212543289U

CN212543289U - GIS bus with function of realizing low-voltage side delta wiring of 500kV main transformer

Info

Publication number: CN212543289U
Application number: CN202021511598.8U
Authority: CN
Inventors: 李世伟; 刘军; 姬春义; 崔灿; 王凯; 程志恒; 张燕锋; 张子琪
Original assignee: State Grid Anhui Electric Power Co Ltd; China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
Current assignee: State Grid Anhui Electric Power Co Ltd; China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-02-12
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to a GIS generating line with realize 500kV main transformer low pressure side triangle wiring function, including three-phase GIS main bus, GIS branch bus one, GIS branch bus two, GIS branch bus three, GIS branch bus four, GIS branch bus five, GIS branch bus six, a looks inlet wire sleeve pipe, x looks inlet wire sleeve pipe, b looks inlet wire sleeve pipe, y looks inlet wire sleeve pipe, c looks inlet wire sleeve pipe and z looks inlet wire sleeve pipe altogether. The three-phase common box GIS main bus comprises a GIS bus cylinder, an A-phase bus, a B-phase bus and a C-phase bus. And the first GIS branch bus is connected with the A-phase bus. And the GIS branch bus II is connected with the C-phase bus. And the GIS branch bus III is connected with the B-phase bus. And the GIS branch bus four is connected with the phase A bus. And a GIS branch bus five is connected with the C-phase bus. And a GIS branch bus six is connected with a B-phase bus. The utility model discloses utilize that GIS generating line size is little, operation safe and reliable and branch generating line can draw the characteristics that connect wantonly, realize the triangle wiring of 500kV transformer substation low pressure side under the limited condition in space.

Description

GIS bus with function of realizing low-voltage side delta wiring of 500kV main transformer

Technical Field

The utility model relates to a transformer substation technical field, concretely relates to GIS generating line with realize 500kV main transformer low pressure side triangle wiring function.

Background

The 500kV main transformer is generally a single-phase auto-excitation-free transformer, two poles of a low-voltage winding of each phase transformer are led out through a sleeve, wherein the phase A transformer is led out through a sleeve a and a sleeve x, the phase B transformer is led out through a sleeve B and a sleeve y, and the phase C transformer is led out through a sleeve C and a sleeve z. The low-voltage side of the 500kV transformer substation generally adopts delta connection, in the national grid general design, the low-voltage side of the 500kV transformer substation adopts a tubular bus, a low-voltage sleeve of a single-phase transformer is connected to the tubular bus through a conductor, and the delta connection is completed on the tubular bus.

In some established 500kV transformer substations, a main breaker is not arranged on the low-voltage side of a main transformer, delta connection is completed on a main bus on the low-voltage side, through years of operation experience and data statistics, the power failure probability of the main transformer of the 500kV transformer substation without the main breaker is higher, and in order to improve the phenomenon, a plurality of power-saving companies require that the installation engineering of the main breaker interval is gradually completed on the 500kV transformer substation without the low-voltage side main breaker interval in the early stage. In a transformer substation provided with a main breaker, low-voltage side delta connection needs to be realized on a bus bar, and if the bus bar still adopts a tubular bus bar, the requirement of electrical safety distance is considered, the field space is limited, and feasibility is not available.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a GIS generating line with realize 500kV main transformer low pressure side triangle wiring function utilizes the characteristics that GIS generating line size is little, operation safe and reliable and branch's generating line can draw the connecing wantonly, realizes the triangle wiring of 500kV transformer substation low pressure side under the limited condition in space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a GIS bus with a function of realizing delta wiring on a low-voltage side of a 500kV main transformer comprises a three-phase common-box GIS main bus, six incoming line sleeves and six GIS branch buses; the six wire inlet sleeves are an a-phase wire inlet sleeve, an x-phase wire inlet sleeve, a b-phase wire inlet sleeve, a y-phase wire inlet sleeve, a c-phase wire inlet sleeve and a z-phase wire inlet sleeve in sequence; the six GIS branch buses are sequentially a GIS branch bus I, a GIS branch bus II, a GIS branch bus III, a GIS branch bus IV, a GIS branch bus V and a GIS branch bus VI. The three-phase common box GIS main bus comprises a GIS bus cylinder, and an A-phase bus, a B-phase bus and a C-phase bus which are arranged in the GIS bus cylinder. The phase a incoming line sleeve is connected with the phase A bus through a GIS branch bus I; and the x-phase inlet wire sleeve is connected with the C-phase bus through a GIS branch bus II. And the B-phase incoming line sleeve is connected with the B-phase bus through a GIS branch bus III. And the y-phase incoming line sleeve is connected with the A-phase bus through the GIS branch bus four. And the C-phase incoming line sleeve is connected with the C-phase bus through a GIS branch bus five. And the z-phase incoming line sleeve is connected with the B-phase bus through a GIS branch bus six.

And the a-phase incoming line sleeve is connected with a low-voltage side a-phase sleeve of the 500kV A-phase main transformer through a conductor medium. And the x-phase incoming line sleeve is connected with a low-voltage side x-phase sleeve of the 500kV A-phase main transformer through a conductor medium. And the B-phase incoming line sleeve is connected with a B-phase sleeve at the low-voltage side of the 500kV B-phase main transformer through a conductor medium. And the y-phase incoming line sleeve is connected with a low-voltage side y-phase sleeve of the 500kV B-phase main transformer through a conductor medium. And the C-phase incoming line sleeve is connected with a C-phase sleeve at the low-voltage side of the 500kV C-phase main transformer through a conductor medium. And the z-phase incoming line sleeve is connected with a z-phase sleeve at the low-voltage side of the 500kV C-phase main transformer through a conductor medium.

And a branch bus support is respectively arranged below the first GIS branch bus, the second GIS branch bus, the third GIS branch bus, the fourth GIS branch bus, the fifth GIS branch bus and the sixth GIS branch bus. The branch bus supports the GIS branch buses, and the GIS branch buses are not electrically connected.

According to the above technical scheme, the utility model discloses utilize that GIS generating line size is little, operation safe and reliable and branch's generating line can draw the characteristics that connect wantonly, realize the triangle wiring of 500kV transformer substation low pressure side under the limited condition in space.

Drawings

FIG. 1 is an electrical schematic wiring diagram of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is an application scene diagram of the present invention;

fig. 5 is a cross-sectional view of an application scene of the present invention.

Wherein:

1. GIS main bus 2, GIS branch bus 2-1, GIS branch bus one, 2-2, GIS branch bus two, 2-3, GIS branch bus three, 2-4, GIS branch bus four, 2-5, GIS branch bus five, 2-6, GIS branch bus six, 3, a phase inlet bushing, 4, x phase inlet bushing, 5, b phase inlet bushing, 6, y phase inlet bushing, 7, the system comprises a C-phase incoming line sleeve, 8 and z-phase incoming line sleeves, 9, a branch bus support, 10, a low-voltage side a-phase sleeve, 11, a low-voltage side x-phase sleeve, 12, a low-voltage side B-phase sleeve, 13, a low-voltage side y-phase sleeve, 14, a low-voltage side C-phase sleeve, 15, a low-voltage side z-phase sleeve, 16 and 500kV A phase transformers, 17 and 500kV B phase transformers, 18 and 500kV C phase transformers, 19 and conductor media.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

the GIS bus with the function of realizing the low-voltage side delta connection of the 500kV main transformer shown in fig. 1-3 comprises a GIS main bus 1, six incoming bushings and six GIS branch buses 2. The six incoming line sleeves are an a-phase incoming line sleeve 3, an x-phase incoming line sleeve 4, a b-phase incoming line sleeve 5, a y-phase incoming line sleeve 6, a c-phase incoming line sleeve 7 and a z-phase incoming line sleeve 8 in sequence. The six GIS branch buses are sequentially a GIS branch bus I2-1, a GIS branch bus II 2-2, a GIS branch bus III 2-3, a GIS branch bus IV 2-4, a GIS branch bus V2-5 and a GIS branch bus VI 2-6. The three-phase common box GIS main bus 1 comprises a GIS bus cylinder, and an A-phase bus, a B-phase bus and a C-phase bus which are arranged in the GIS bus cylinder. The phase a incoming line sleeve 3 is arranged above one end of the GIS branch bus I2-1, and the other end of the GIS branch bus I2-1 is connected with the phase A bus. The x-phase wire inlet sleeve 4 is arranged above one end of the GIS branch bus II 2-2, and the other end of the GIS branch bus II 2-2 is connected with the C-phase bus. And the phase B incoming line sleeve 5 is arranged above one end of the GIS branch bus III 2-3, and the other end of the GIS branch bus III 2-3 is connected with the phase B bus. The y-phase incoming line sleeve 6 is arranged above one end of the GIS branch bus bar IV 2-4, and the other end of the GIS branch bus bar IV 2-4 is connected with the A-phase bus bar. The C-phase incoming line sleeve 7 is arranged above one end of the GIS branch bus five 2-5, and the other end of the GIS branch bus five 2-5 is connected with the C-phase bus. And the z-phase incoming line sleeve 8 is arranged above one end of the GIS branch bus six 2-6, and the other end of the GIS branch bus six 2-6 is connected with the B-phase bus. Each incoming line sleeve is connected with a GIS main bus through a GIS branch bus respectively, and six GIS branch buses are connected to A, C, B, A, C, B phase buses in a GIS bus cylinder respectively, so that the electrical connection of a and y, b and z, and c and x phase sleeves is realized.

As shown in fig. 3, a branch busbar support 9 is respectively arranged below the first GIS branch busbar 2-1, the second GIS branch busbar 2-2, the third GIS branch busbar 2-3, the fourth GIS branch busbar 2-4, the fifth GIS branch busbar 2-5 and the sixth GIS branch busbar 2-6. And the branch bus support 9 plays a supporting role for the GIS branch bus and is not electrically connected with the GIS branch bus.

As shown in fig. 4 and 5, 1 group of 500kV main transformers consists of 3 single-phase auto-transformer without excitation, two poles of the low-voltage winding of each phase transformer are led out through bushings, wherein the phase a transformer 16 is led out through a bushing a and a bushing x, the phase B transformer 17 is led out through a bushing B and a bushing y, and the phase C transformer 18 is led out through a bushing C and a bushing z. As shown in fig. 4 and 5, the utility model discloses arrange in main transformer low pressure side sleeve pipe side, the a looks sleeve pipe 10, x looks sleeve pipe 11, b looks sleeve pipe 12, y looks sleeve pipe 13, c looks sleeve pipe 14, the z looks sleeve pipe 15 of main transformer low pressure side connect to respectively on a looks inlet wire sleeve pipe 3, x looks inlet wire sleeve pipe 4, b looks inlet wire sleeve pipe 5, y looks inlet wire sleeve pipe 6, c looks inlet wire sleeve pipe 7, the z looks inlet wire sleeve pipe 8 through conductor medium 19.

In the general design of a 500kV transformer substation of a national power grid limited company, delta wiring of a low-voltage side of a 500kV main transformer is realized through a supporting tubular bus, A, B, C three-phase tubular buses are horizontally arranged, a, x, b, y, c and z phase sleeves of the low-voltage side of the main transformer are respectively connected to A, C, B, A, C, B phase tubular buses, and the tubular buses are bare live bodies and are insulated by air, so that the tubular buses occupy larger space when being arranged for ensuring electrical safety distance between peripheral equipment and various operation and maintenance working conditions. The utility model provides a GIS generating line adopts SF6 (sulfur hexafluoride) gas as insulating medium, can seal three-phase A, B, C generating line in a narrow and small generating line section of thick bamboo, and generating line section of thick bamboo shell is uncharged under the normal operating mode, consequently the utility model discloses occupation space is less, can effectively utilize the field device room space of transformer substation to arrange. Compared with the prior art, adopt the utility model discloses afterwards, the vertical size of 500kV transformer substation can reduce 12 meters.

In some established 500kV transformer substations, a main breaker is not arranged on the low-voltage side of a main transformer, delta connection is completed on a main bus on the low-voltage side, through years of operation experience and data statistics, the power failure probability of the main transformer of the 500kV transformer substation without the main breaker is higher, and in order to improve the phenomenon, a plurality of power-saving companies require that the installation engineering of the main breaker interval is gradually completed on the 500kV transformer substation without the low-voltage side main breaker interval in the early stage. If still adopt tubular generating line to realize the triangle wiring of main transformer low pressure side, then the field space is limited, does not have the feasibility, adopts the utility model discloses can effectively solve this difficult problem. The utility model is suitable for a need increase the nevertheless limited 500kV transformer substation of on-the-spot space of low pressure side main circuit breaker, the utility model discloses make full use of GIS generating line compact structure, area are little, the configuration is nimble, the reliability is high and simple to operate's characteristics compare in open-type cast generating line, can realize the function of 500kV main transformer low pressure side triangle wiring under the limited condition of on-the-spot space.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a GIS generating line with realize 500kV main transformer low pressure side delta wiring function which characterized in that: the three-phase bus-bar box type GIS comprises a three-phase common box GIS main bus, six incoming line sleeves and six GIS branch buses; the six wire inlet sleeves are an a-phase wire inlet sleeve, an x-phase wire inlet sleeve, a b-phase wire inlet sleeve, a y-phase wire inlet sleeve, a c-phase wire inlet sleeve and a z-phase wire inlet sleeve in sequence; the six GIS branch buses are sequentially a GIS branch bus I, a GIS branch bus II, a GIS branch bus III, a GIS branch bus IV, a GIS branch bus V and a GIS branch bus VI; the three-phase common box GIS main bus comprises a GIS bus cylinder, and an A-phase bus, a B-phase bus and a C-phase bus which are arranged in the GIS bus cylinder; the phase a incoming line sleeve is connected with the phase A bus through a GIS branch bus I; the x-phase incoming line sleeve is connected with the C-phase bus through a GIS branch bus II; the B-phase incoming line sleeve is connected with the B-phase bus through a GIS branch bus III; the y-phase incoming line sleeve is connected with the A-phase bus through a GIS branch bus IV; the C-phase incoming line sleeve is connected with the C-phase bus through a GIS branch bus five; and the z-phase incoming line sleeve is connected with the B-phase bus through a GIS branch bus six.

2. The GIS bus bar with the function of realizing the low-voltage side delta connection of a 500kV main transformer according to claim 1, wherein the bus bar comprises: the phase a incoming line sleeve is connected with a phase a sleeve at the low voltage side of the 500kV phase A main transformer through a conductor medium; the x-phase incoming line sleeve is connected with a low-voltage side x-phase sleeve of a 500kV A-phase main transformer through a conductor medium; the B-phase incoming line sleeve is connected with a B-phase sleeve at the low-voltage side of the 500kV B-phase main transformer through a conductor medium; the y-phase incoming line sleeve is connected with a low-voltage side y-phase sleeve of a 500kV B-phase main transformer through a conductor medium; the C-phase incoming line sleeve is connected with a C-phase sleeve at the low-voltage side of the 500kV C-phase main transformer through a conductor medium; and the z-phase incoming line sleeve is connected with a z-phase sleeve at the low-voltage side of the 500kV C-phase main transformer through a conductor medium.

3. The GIS bus bar with the function of realizing the low-voltage side delta connection of a 500kV main transformer according to claim 1, wherein the bus bar comprises: and a branch bus support is respectively arranged below the first GIS branch bus, the second GIS branch bus, the third GIS branch bus, the fourth GIS branch bus, the fifth GIS branch bus and the sixth GIS branch bus.