CN212784490U - 35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment - Google Patents

35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment Download PDF

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Publication number
CN212784490U
CN212784490U CN202021798833.4U CN202021798833U CN212784490U CN 212784490 U CN212784490 U CN 212784490U CN 202021798833 U CN202021798833 U CN 202021798833U CN 212784490 U CN212784490 U CN 212784490U
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China
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main
gis
bus
circuit breaker
transformer
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CN202021798833.4U
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Inventor
李世伟
刘群
崔灿
朱惠君
程中杰
张超
李文强
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China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
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China Energy Engineering Group Anhui Electric Power Design Institute Co Ltd
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Abstract

The utility model relates to a 35kV of 500kV transformer substation 35kV side total circuit breaker interval system based on 35kV GIS equipment, including 500kV transformer substation main transformer, 35kV main bus, 35kV GIS generating line and total circuit breaker interval. And a 35kV GIS bus is arranged below the 35kV main bus, one end of the 35kV GIS bus is connected with a low-voltage side sleeve of a main transformer of a 500kV transformer substation, and the other end of the 35kV GIS bus is connected with the 35kV main bus through a main circuit breaker interval. GIS equipment is adopted at the interval of the main circuit breakers, and the interval of the main circuit breakers is arranged below a 35kV main bus. The 35kV GIS bus has the function of realizing the triangular wiring of the low-voltage side of the main transformer and is arranged below the 35kV main bus. According to the above technical scheme, the utility model is suitable for a 500kV transformer substation for dividing the phase transition for 35kV busbar and total circuit breaker interval reservation position and main transformer in earlier stage does not utilize the advantage that 35kV GIS generating line and GIS equipment size are little, safe and reliable, installs total circuit breaker additional for 500kV transformer substation low pressure side and provides the solution, has reduced the probability that 500kV transformer substation owner becomes the power failure and total station stops entirely even.

Description

35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment
Technical Field
The utility model relates to a 500kV transformer substation technical field, concretely relates to 500kV transformer substation 35kV side master breaker spacing system based on 35kV GIS equipment.
Background
There have been different opinions for a long time as to whether the main circuit breaker of the main transformer 35kV of a 500kV substation is installed or not. Because do not install total circuit breaker interval and can save occupation of land and engineering investment, economic benefits is showing, consequently, has that the total circuit breaker is not installed to a considerable number of 500kV transformer substations of having built, and does not reserve the long-range mounted position for 35kV busbar and total circuit breaker interval. However, in a substation without a main circuit breaker, when a fault occurs and the branch circuit breaker fails, three sides of the main transformer need to be cut off, and when equipment between the 35kV main bus and the branch circuit breaker fails or power failure needs to be repaired, the corresponding main transformer needs to have power failure. If the main circuit breaker is arranged, the condition only needs the power failure of the low-voltage side of the main transformer, and the high-medium-voltage side of the main transformer can normally operate.
In addition, through years of operation experience and data statistics, the defect rate of the 35kV bus isolating switch is high, a transformer station without a low-voltage side main circuit breaker is provided, and the main transformer is required to accompany and stop for overhauling the bus isolating switch due to the fact that the low-voltage bus is dead-jointed with the low-voltage side of the main transformer, so that the power failure probability of the main transformer is increased. In order to improve the phenomenon, a plurality of provincial electric power companies require that a 500kV transformer substation which is not provided with a low-voltage side main breaker interval in the early stage is gradually completed with an additional installation project of the main breaker interval. Because of the compact overall arrangement of transformer substation, if do not reserve the mounted position for 35kV busbar and total circuit breaker interval in earlier stage, conventional equipment is difficult to satisfy the field space and arranges the requirement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 500kV transformer substation 35kV side total circuit breaker interval system's solution based on 35kV GIS equipment, this scheme are applicable to in earlier stage not for 35kV busbar and total circuit breaker interval reservation position and main transformer for dividing the 500kV transformer substation of phase transition, satisfy 500kV transformer substation 35kV side and install total circuit breaker interval requirement additional, have characteristics such as compact structure, operation safe and reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a35 kV side main circuit breaker interval system of a 500kV transformer substation based on 35kV GIS equipment comprises a 500kV transformer substation main transformer and a 35kV main bus. A 35kVGIS bus is arranged below the 35kV main bus, one end of the 35kV GIS bus is connected with a low-voltage side sleeve of a main transformer of a 500kV transformer substation, and the other end of the 35kV GIS bus is connected with the 35kV main bus through a main circuit breaker interval; GIS equipment is adopted at the main circuit breaker interval, and the main circuit breaker interval sets up in 35kV main bus below.
Furthermore, a 35kV GIS bus incoming line sleeve is arranged on the 35kV GIS bus, and the 35kV GIS bus incoming line sleeve is connected with a low-voltage side sleeve of a main transformer of the 500kV transformer substation through a flexible conductor.
Furthermore, the main transformer side of the main circuit breaker interval is connected with a 35kV GIS bus, and the other side of the main circuit breaker interval is connected to the 35kV main bus through a wire outlet sleeve and a flexible conductor.
Furthermore, the number of 35kV GIS bus incoming line sleeves is 6, and the 35kV GIS bus incoming line sleeves correspond to 6 low-voltage side sleeves of 3 single-phase 500kV main transformers respectively.
Furthermore, the 35kV GIS bus and the 35kV main bus are arranged in parallel.
According to the above technical scheme, the utility model is suitable for a 500kV transformer substation for dividing the phase transition for 35kV busbar and total circuit breaker interval reservation position and main transformer in earlier stage does not utilize the advantage that 35kV GIS generating line and GIS equipment size are little, safe and reliable, installs total circuit breaker additional for 500kV transformer substation low pressure side and provides the solution, has reduced the probability that 500kV transformer substation owner becomes the power failure and total station stops entirely even.
Drawings
Fig. 1 is a top view of the present invention;
FIG. 2 is a cross-sectional view of the main transformer inlet wire of the present invention;
fig. 3 is a sectional view of the total circuit breaker interval of the present invention.
Wherein:
1. 35kV GIS generating line, 2, main circuit breaker interval, 3, 35kV main generating line, 4, 35kV GIS generating line inlet bushing, 5, 500kV transformer substation main transformer low-voltage side bushing, 6, 500kV transformer substation main transformer low-voltage side bushing to the flexible conductor between 35kV GIS generating line inlet bushing, 7, outlet bushing, 8, GIS main circuit breaker interval to the flexible conductor between 35kV main generating line, 9, 500kV transformer substation main transformer.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-3, a 35kV side main circuit breaker spacing system of a 500kV substation based on 35kV GIS equipment includes a 500kV substation main transformer 9, a 35kV main bus 3, a 35kV GIS bus 1 and a main circuit breaker spacing 2. The utility model discloses a 35kV GIS generating line 1 connects to the 35kV GIS generating line as 35kV busbar, 500kV transformer substation main transformer low pressure side to at the inside triangle-shaped wiring of accomplishing main transformer low pressure side of 35kV GIS generating line 1. One end of the 35kV GIS bus 1 is connected with a low-voltage side sleeve 5 of a main transformer 9 of a 500kV transformer substation, and the other end of the 35kV GIS bus is connected with a 35kV main bus 3 through a main circuit breaker interval 2. The main circuit breaker interval 2 adopts GIS equipment, and the main circuit breaker interval 2 and the 35kV GIS bus 1 are respectively arranged below the 35kV main bus 3.
The scheme of the adding circuit breaker in the prior art adopts open type equipment, wherein a bus bar adopts a tubular aluminum alloy conductor, and the main circuit breaker comprises a porcelain column type circuit breaker, an oil immersed current transformer, a horizontal opening type isolating switch and an inter-equipment wire at intervals. The open type equipment has an exposed high-voltage live part, measures such as enlarging the distance between equipment, raising the installation height of the equipment and the like are required during arrangement in order to avoid equipment grounding, short-circuit faults and harm to personal safety, and therefore the conventional circuit breaker adding scheme needs to occupy a large space of a transformer substation. For a transformer substation which is not reserved with a field of a summing breaker in a first-stage project and has the necessity of the summing breaker at present, the conventional summing breaker scheme has no feasibility. GIS generating line and GIS equipment adopt SF6 as insulating medium, the utility model discloses the GIS generating line is sealed A, B, C three-phase conductor in the casing, replaces 35kV cast aluminum alloy to realize the function of main transformer low pressure side triangle-shaped wiring as the generating line that converges, and GIS equipment is sealed circuit breaker, current transformer, isolator and conductor in the casing, replaces knob insulator formula circuit breaker, oily formula current transformer, horizontal open-type isolator and equipment room wire to realize the spaced function of total circuit breaker. GIS generating line and GIS equipment take up an area of the space for a short time, and it does not have the electrified position of high pressure that exposes, need not consider when arranging with the electrical safety distance of other non-electrified bodies, can arrange according to the clearance of having built transformer substation distribution device, provides solution for the limited 500kV of on-the-spot space has built transformer substation low pressure side and adds total circuit breaker.
Furthermore, a 35kV GIS bus incoming line sleeve 4 is arranged on the 35kV GIS bus 1, and the 35kV GIS bus incoming line sleeve 4 is connected with a 500kV transformer substation main transformer low-voltage side sleeve 5 through a flexible conductor 6.
Furthermore, the main transformer side of the main circuit breaker interval 2 is connected with a 35kV GIS bus 1, and the other side is connected to the 35kV main bus through a wire outlet sleeve 7 and a flexible conductor 8.
Furthermore, the number of the 35kV GIS bus incoming line sleeves 4 is 6, and the 35kV GIS bus incoming line sleeves correspond to 6 low-voltage side sleeves 6 of 3 single-phase 500kV main transformers respectively.
Further, the 35kV GIS bus 1 is parallel to the 35kV main bus 3 and is arranged below the 35kV main bus 3. For a transformer substation which does not consider setting a main breaker interval in the earlier stage, the field space is limited, and a long and narrow vacant space exists below the 35kV tubular bus, so that the arrangement requirement of 35kVGIS equipment is met. In order to realize the triangular wiring of the low-voltage side of the main transformer, the GIS bus is provided with 6 incoming bushings and is connected to 6 outgoing bushings of the low-voltage side of the main transformer through conductor media, the 6 outgoing bushings of the low-voltage side of the main transformer are distributed on 3 split-phase transformers, and the 3 split-phase transformers are arranged in parallel with the 35kV tubular bus. The 35kVGIS bus is arranged below the 35kV tubular bus in parallel, so that the connection distance between the incoming line sleeve of the 35kVGIS equipment and the outgoing line sleeve of the low-voltage side of the main transformer is shortened to the maximum extent on the one hand, and on the other hand, the influence of the 35kV GIS bus on other equipment is reduced to the maximum extent.
The utility model discloses the advantage that make full use of GIS equipment size is little, 35kV GIS generating line and GIS total break interval arrange in 35kV main bus lower position, have realized installing the possibility of total circuit breaker additional for the 35kV side of 500kV transformer substation under the limited circumstances in current place. The utility model discloses can add in the disconnected engineering furthest's of 500kV transformer substation 35kV reduction to the influence of having built equipment and facility, reduce construction work volume, power failure scope and power off time.
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 (5)

1. A35 kV GIS equipment-based 35kV side main circuit breaker interval system of a 500kV transformer substation comprises a 500kV transformer substation main transformer and a 35kV main bus; the method is characterized in that: a 35kV GIS bus is arranged below the 35kV main bus, one end of the 35kV GIS bus is connected with a low-voltage side sleeve of a main transformer of a 500kV transformer substation, and the other end of the 35kV GIS bus is connected with the 35kV main bus through a main circuit breaker interval; GIS equipment is adopted at the main circuit breaker interval, and the main circuit breaker interval sets up in 35kV main bus below.
2. The 35kV transformer substation 35kV side main breaker spacing system based on 35kV GIS equipment according to claim 1, characterized in that: and a 35kV GIS bus incoming line sleeve is arranged on the 35kV GIS bus, and the 35kV GIS bus incoming line sleeve is connected with a low-voltage side sleeve of a main transformer of a 500kV transformer substation through a flexible conductor.
3. The 35kV transformer substation 35kV side main breaker spacing system based on 35kV GIS equipment according to claim 1, characterized in that: the main transformer side of the main circuit breaker interval is connected with a 35kV GIS bus, and the other side of the main circuit breaker interval is connected to the 35kV main bus through a wire outlet sleeve and a flexible conductor.
4. The 35kV transformer substation 35kV side main breaker spacing system based on 35kV GIS equipment according to claim 2, characterized in that: the number of 35kV GIS generating line inlet bushing is 6, corresponds 6 low pressure side bushings of 3 single-phase 500kV main transformers respectively.
5. The 35kV transformer substation 35kV side main breaker spacing system based on 35kV GIS equipment according to claim 1, characterized in that: and the 35kV GIS bus is arranged below the 35kV main bus in parallel.
CN202021798833.4U 2020-08-25 2020-08-25 35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment Active CN212784490U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021798833.4U CN212784490U (en) 2020-08-25 2020-08-25 35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021798833.4U CN212784490U (en) 2020-08-25 2020-08-25 35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment

Publications (1)

Publication Number Publication Date
CN212784490U true CN212784490U (en) 2021-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021798833.4U Active CN212784490U (en) 2020-08-25 2020-08-25 35kV transformer substation 35kV side main circuit breaker spacing system based on 35kV GIS equipment

Country Status (1)

Country Link
CN (1) CN212784490U (en)

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