CN110729635A - Gas-insulated metal-enclosed switchgear - Google Patents
Gas-insulated metal-enclosed switchgear Download PDFInfo
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- CN110729635A CN110729635A CN201810785960.1A CN201810785960A CN110729635A CN 110729635 A CN110729635 A CN 110729635A CN 201810785960 A CN201810785960 A CN 201810785960A CN 110729635 A CN110729635 A CN 110729635A
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- bus
- gis
- branch
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/22—Layouts for duplicate bus-bar selection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to a gas insulated metal enclosed switchgear, which comprises three GIS single phases, wherein each GIS single-phase main bus comprises a first main bus and a second main bus which extend along the left-right direction, the first main bus is electrically connected with a first branch bus, the second main bus is electrically connected with a second branch bus, the first branch bus and the second branch bus are respectively provided with a first wire outlet end and a second wire outlet end, a first circuit breaker is arranged between the first main bus and the first wire outlet end, a second circuit breaker is arranged between the second main bus and the second wire outlet end, the GIS single-phase first circuit breakers are arranged in parallel in a straight line along the left-right direction, and the GIS single-phase first circuit breakers are positioned at the front side or the rear side of each main bus; the single-phase second circuit breakers of the GIS are arranged in parallel in a left-right direction, and are positioned on the front side or the rear side of each main bus. The invention solves the problem that the GIS is large in overall width due to the fact that three inter-phase corresponding circuit breakers are distributed and distributed along a main bus in the prior art.
Description
Technical Field
The invention relates to a gas-insulated metal-enclosed switchgear in the field of power transmission.
Background
The 330kV transformer is generally responsible for multiple tasks of collecting electric energy, redistributing load, transmitting power and the like in a northwest power grid system, and the position of the 330kV transformer in the northwest power grid transmission system is very critical. Meanwhile, the special voltage class of the northwest power grid bears the important task of transmitting the west power and the east power, and the stable operation of the whole northwest power grid is concerned, while the main connection mode adopted by the existing 330kVGIS (namely, gas insulated metal enclosed switchgear) is mostly double-bus connection, and although the double-bus connection can be used for overhauling a bus system through switching operation under the condition of not influencing power supply, the double-bus connection is easy to cause serious consequences due to misoperation. Meanwhile, when one group of buses is in fault or overhauled, half of the loop power supply is interrupted, which is not allowable for a large-capacity power plant and a hub substation.
The current 3/2 wiring form can well solve the problem, such as the 'line arrangement structure of a GIS power distribution device' disclosed in chinese patent CN103633567B, the line arrangement structure comprises three GIS single phases, each GIS single phase comprises a first main bus and a second main bus, a branch bus is connected between the first main bus and the second main bus, three circuit breakers are arranged on the branch bus at intervals, and a leading-out terminal is arranged between two adjacent circuit breakers and used for being connected with a corresponding power supply loop. When any group of buses or circuit breaker needs to be overhauled, each power supply loop still works normally as long as the corresponding bus is disconnected, and the condition that no power supply loop is interrupted is ensured. However, the existing GIS still has the following problems that the layout of each component in each single phase of the GIS is not reasonable, six main buses are required to be arranged for three phases every time two main buses correspond to each other, and the main buses are arranged side by side, so that the arrangement of the main buses occupies a large space; in addition, the setting position of the outlet end is single, and the requirements of various use environments cannot be met; the air chamber of the branch bus is directly communicated with the air chamber of the main bus, and the air chamber of the main bus can be influenced when the branch bus is overhauled or long-term equipment is expanded.
Disclosure of Invention
The invention aims to provide gas insulated metal enclosed switchgear to solve the problem that the GIS is large in overall width due to the fact that three groups of circuit breakers are arranged in parallel to a main bus.
In order to solve the above problems, the technical solution of the gas insulated metal-enclosed switchgear provided by the present invention is:
a gas insulated metal enclosed switchgear comprises three single-phase GIS, wherein each single-phase main bus comprises a first main bus and a second main bus which extend along the left-right direction, a first branch bus is electrically connected with the first main bus, a second branch bus is electrically connected with the second main bus, a first leading-out end is arranged on the first branch bus, a second leading-out end is arranged on the second branch bus, a first circuit breaker is arranged between the first main bus and the first leading-out end on the first branch bus, a second circuit breaker is arranged between the second main bus and the second leading-out end on the second branch bus, the single-phase first circuit breakers of the GIS are arranged in parallel in a straight line along the left-right direction, and the single-phase first circuit breakers of the GIS are positioned at the front side or the rear side of the main buses; the single-phase second circuit breakers of the GIS are arranged in parallel in a left-right direction, and are positioned on the front side or the rear side of each main bus.
Each single-phase first circuit breaker of GIS and each single-phase second circuit breaker of GIS lie in each main bus same side, and each single-phase second circuit breaker of GIS is in each single-phase first circuit breaker of GIS directly right side, and first circuit breaker, second circuit breaker are the vertical circuit breaker of arranging side by side.
Each GIS single phase also comprises a third circuit breaker connected in series between the first branch bus and the second branch bus, the third circuit breaker is arranged between the first leading-out terminal and the second leading-out terminal of the corresponding GIS single phase, the third circuit breakers of each GIS single phase are arranged in parallel in a left-right direction, the third circuit breakers of each GIS single phase are arranged right to the first circuit breaker of each GIS single phase and right to the left of the second circuit breaker of each GIS single phase, and the third circuit breakers are vertical circuit breakers arranged in parallel.
A first branch gas-isolating insulator is arranged at the joint of the first main bus and the first branch bus, and a second branch gas-isolating insulator is arranged at the joint of the second main bus and the second branch bus.
The upper end of the first circuit breaker is provided with a first isolation grounding device, and the lower end of the first circuit breaker is provided with a second isolation grounding device; the lower end of the third circuit breaker is provided with a third isolation grounding device, and the upper end of the third circuit breaker is provided with a fourth isolation grounding device; the upper end of the second circuit breaker is provided with a fifth isolation grounding device, the lower end of the second circuit breaker is provided with a sixth isolation grounding device, the first branch bus comprises a first branch bus first connecting part connected between the first main bus and the first isolation grounding device and a first branch bus second connecting part connected between the second isolation grounding device and the third isolation grounding device and extending along the left-right direction, and the second branch bus comprises a second branch bus first connecting part connected between the second main bus and the sixth isolation grounding device and a second branch bus second connecting part connected between the fourth isolation grounding device and the fifth isolation grounding device and extending along the left-right direction.
The first wire outlet end is arranged on the second connecting part of the first branch bus, and the second wire outlet end is arranged on the second connecting part of the second branch bus.
The first wire outlet end is connected to the right end of the third isolation grounding device; and the second wire outlet end is connected to the left end of the fourth isolation grounding device.
The first wire outlet end is connected to the left end of the second isolation grounding device; the second wire outlet end is connected to the right end of the fifth isolation grounding device.
The single-phase first main bus and the single-phase second main bus of each GIS are arranged in parallel at intervals from top to bottom, and the single-phase main buses of each GIS are arranged in parallel at intervals along the front-back direction.
In the height direction, the first branch bus, the second branch bus, the first breaker and the second breaker of each GIS single phase are positioned between the first main bus and the second main bus.
The invention has the beneficial effects that: in the invention, the first circuit breakers of the GIS are arranged in parallel at the front side or the rear side of each main bus in a left-right direction, the second circuit breakers of the GIS are arranged in parallel at the front side or the rear side of each main bus in a left-right direction, and the circuit breakers are arranged at one side of the main bus, so that the circuit breakers are not influenced by other equipment, the maintenance of the circuit breakers can be facilitated, the arrangement direction of the first circuit breakers of the GIS is consistent with the trend of the main bus, and the problem of overlarge integral width of the GIS caused by arrangement of corresponding circuit breakers among the GIS is avoided.
Meanwhile, the first branch bus and the second branch bus are connected through a breaking device with a third circuit breaker, so that when one main bus or the circuit breaker needs to be overhauled, the other main bus supplies power to the first wire outlet end and the second wire outlet end, normal use of two power supply loops is guaranteed, and the problem of power failure of a local power supply loop is avoided.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of a gas-insulated metal-enclosed switchgear according to the present invention;
fig. 2 is a schematic layout of the first main bus, the second main bus and each isolated grounding device of the GIS single phase in fig. 1;
fig. 3 is an electrical schematic diagram of a GIS single phase in embodiment 1 of the gas insulated metal enclosed switchgear;
FIG. 4 is a schematic structural view of embodiment 2 of the gas-insulated metal-enclosed switchgear of the present invention;
fig. 5 is a schematic layout of the first main bus, the second main bus and each isolated grounding device of the GIS single phase of fig. 4;
FIG. 6 is a schematic structural view of embodiment 3 of the gas-insulated metal-enclosed switchgear of the present invention;
fig. 7 is a schematic layout of the first main bus, the second main bus and each isolated grounding device of the GIS single phase in fig. 6.
Detailed Description
Gas insulated metal enclosed switchgear example 1:
as shown in fig. 1 to 3: the gas insulated metal-enclosed switchgear in this embodiment is 330kVGIS, and GIS is the abbreviation of gas insulated metal-enclosed switchgear, and GIS includes three GIS single-phase, and every single-phase main bus of GIS all includes first main bus 1 and the second main bus 8 that the interval set up side by side from top to bottom, and first main bus 1, second main bus 8 all extend along left right direction.
A first branch bus with the upper end electrically connected with the first main bus and a second branch bus with the lower end electrically connected with the second main bus are arranged between the first main bus 1 and the second main bus 8, the first branch bus and the second branch bus are connected in series through a breaking device with a third circuit breaker 18, a first leading-out terminal 6 and a second leading-out terminal 11 which are connected with corresponding power supply circuits are respectively arranged on the first branch bus and the second branch bus, a first circuit breaker 17 is arranged between the first main bus 1 and the first leading-out terminal 6 on the first branch bus, a second circuit breaker 19 is arranged between the second main bus 8 and the second leading-out terminal 11 on the second branch bus, and the first circuit breaker 17, the second circuit breaker 19 and the third circuit breaker 18 are vertical circuit breakers arranged in parallel, so-called vertical circuit breakers refer to vertically arranged circuit breakers.
The single-phase first circuit breakers 17 of the GIS are arranged in parallel in a left-right direction, the single-phase second circuit breakers 19 of the GIS are arranged in parallel in a left-right direction, the single-phase third circuit breakers 18 of the GIS are arranged in parallel in a left-right direction, and the single-phase first circuit breakers, the single-phase second circuit breakers and the single-phase third circuit breakers of the GIS are all arranged on the front side of the main buses.
Each GIS single-phase third breaker 18 is located directly to the right of each GIS single-phase first breaker 17, and each GIS single-phase second breaker 19 is located directly to the right of each GIS single-phase third breaker 18, i.e. the axis of each breaker is in the same vertical plane.
And in the up-down direction, the first circuit breaker, the second circuit breaker and the third circuit breaker are located between the first main bus 1 and the second main bus 8, that is, the highest positions of the first circuit breaker, the second circuit breaker and the third circuit breaker are lower than the first main bus, and the lowest positions of the first circuit breaker, the second circuit breaker and the third circuit breaker are higher than the second main bus.
The upper end of the first circuit breaker is provided with a first isolation grounding device 3, and the lower end of the first circuit breaker is provided with a second isolation grounding device 5; the lower end of the third breaker is provided with a third isolation grounding device 9, and the upper end of the third breaker is provided with a fourth isolation grounding device 10; the upper end of the second circuit breaker is provided with a fifth isolating and grounding device 15, and the lower end of the second circuit breaker is provided with a sixth isolating and grounding device 14.
The first branch bus includes a first branch bus first connection portion 4 connected between the first main bus 1 and the first isolated ground 3 and a first branch bus second connection portion 7 connected between the second isolated ground 5 and the third isolated ground 9 and extending in the left-right direction.
The second branch bus includes a second branch bus first connecting portion 16 connected between the second main bus 8 and the sixth isolated ground 14, and a second branch bus second connecting portion 13 extending in the left-right direction connected between the fourth isolated ground 10 and the fifth isolated ground 15, each of which includes an isolator and a ground switch in this embodiment. In fig. 1 and 2, item 12 represents the power supply circuit connected to the first outlet terminal.
Part of the bus conductors of the branch buses are located in the corresponding isolating switches, so that the positions of the outlet ends can be flexibly arranged, the use of the branch buses is reduced, and the cost is saved, for example, in the embodiment, the first outlet end 6 is arranged on the second connecting part 7 of the first branch bus, and the second outlet end 11 is arranged on the second connecting part 13 of the second branch bus. The branch position where the first main bus is connected with the first branch bus and the connecting position of the isolating switch of the first isolating and grounding device and the first branch bus are both provided with first branch gas isolating insulators, a first transition gas chamber 2 is formed between the two first branch gas isolating insulators, the branch position where the second main bus is connected with the second branch bus and the connecting position of the isolating switch of the sixth isolating and grounding device and the second branch bus are both provided with second branch gas isolating insulators, a second transition gas chamber is formed between the two second branch gas isolating insulators, each gas isolating insulator is a common insulator and comprises an insulating body and a central conductor which is hermetically arranged on the insulating body, the central conductor penetrates through the insulating body, and the insulating body can be hermetically matched with a corresponding cylinder body. Current transformers 20 are also provided on both sides of each circuit breaker.
According to the invention, through a connection form of 3/2, when one bus has a fault, two power supply circuits do not need to be powered off, for example, when a first main bus has a fault, a first breaker is tripped, a second main bus can supply power to a first outlet end and a second outlet end, the two power supply circuits do not need to be powered off, and the transformer substation can still normally operate. Two main buses are arranged up and down, the whole GIS is arranged neatly and attractively, and the space in the front and back direction is saved. By arranging the transition air chamber, the air chambers of the first main bus and the second main bus are not influenced when the isolating switch is overhauled or long-term equipment is expanded, the workload of a field is reduced, and the field operation time is saved; the vertical circuit breaker is convenient to arrange, and more accords with the bus arrangement form of arranging from top to bottom.
Gas insulated metal enclosed switchgear example 2:
as shown in fig. 4 and 5: the electrical principle of embodiment 2 is the same as that of embodiment 1, and embodiment 2 is different from embodiment 1 in that the arrangement form of the outlet terminal is flexible and changeable because the outlet terminal can be conveniently led out from the corresponding isolating switch, the first outlet terminal 6 is directly connected to the right end of the isolating switch of the third isolating and grounding device 9, and the second outlet terminal 11 is directly connected to the left end of the isolating switch of the fourth isolating and grounding device 10. Item 17 in the figure represents a first circuit breaker; item 18 represents a third circuit breaker; item 19 represents a second circuit breaker; item 1 represents a first main bus; item 12 represents a power supply circuit; item 8 represents the second main bus.
Gas insulated metal enclosed switchgear example 3:
as shown in fig. 6 and 7: the electrical principle of embodiment 3 is the same as that of embodiment 1, and embodiment 3 is different from embodiment 1 in that a first outlet terminal 6 is connected to the left end of the disconnector of the second isolated grounding device 5, and a second outlet terminal 11 is connected to the right end of the disconnector of the fifth isolated grounding device 10. Item 17 in the figure represents a first circuit breaker; item 18 represents a third circuit breaker; item 19 represents a second circuit breaker; item 1 represents a first main bus; item 12 represents a power supply circuit; item 8 represents the second main bus.
In the above three embodiments, the first unidirectional circuit breaker of each GIS is located at the front side of each corresponding main bus, and the second unidirectional circuit breaker of each GIS is located at the front side of each main bus. Of course, correspondingly, the third circuit breaker of each GIS may also be located on the same side of the corresponding main bus in the front-back direction as the first circuit breaker and the second circuit breaker.
Claims (10)
1. The utility model provides a gas insulated metal enclosed switchgear, it is single-phase including three GIS, every single-phase main bus of GIS all includes the first main bus that extends along the left and right directions, second main bus, the electric company has first branch generating line on the first main bus, the electric company has second branch generating line on the second main bus, be provided with first leading-out terminal on the first branch generating line, be provided with the second leading-out terminal on the second branch generating line, be provided with first circuit breaker on the first branch generating line between first main bus and first leading-out terminal, be provided with the second circuit breaker on the second branch generating line between second main bus and second leading-out terminal, its characterized in that: the GIS single-phase first circuit breakers are arranged in parallel in a left-right direction, and are positioned on the front side or the rear side of each main bus; the single-phase second circuit breakers of the GIS are arranged in parallel in a left-right direction, and are positioned on the front side or the rear side of each main bus.
2. The gas-insulated metal-enclosed switchgear device according to claim 1, wherein: each single-phase first circuit breaker of GIS and each single-phase second circuit breaker of GIS lie in each main bus same side, and each single-phase second circuit breaker of GIS is in each single-phase first circuit breaker of GIS directly right side, and first circuit breaker, second circuit breaker are the vertical circuit breaker of arranging side by side.
3. The gas-insulated metal-enclosed switchgear device according to claim 2, characterized in that: each GIS single phase also comprises a third circuit breaker connected in series between the first branch bus and the second branch bus, the third circuit breaker is arranged between the first leading-out terminal and the second leading-out terminal of the corresponding GIS single phase, the third circuit breakers of each GIS single phase are arranged in parallel in a left-right direction, the third circuit breakers of each GIS single phase are arranged right to the first circuit breaker of each GIS single phase and right to the left of the second circuit breaker of each GIS single phase, and the third circuit breakers are vertical circuit breakers arranged in parallel.
4. The gas-insulated metal-enclosed switchgear device according to claim 1, wherein: a first branch gas-isolating insulator is arranged at the joint of the first main bus and the first branch bus, and a second branch gas-isolating insulator is arranged at the joint of the second main bus and the second branch bus.
5. The gas-insulated metal-enclosed switchgear device according to claim 3, wherein: the upper end of the first circuit breaker is provided with a first isolation grounding device, and the lower end of the first circuit breaker is provided with a second isolation grounding device; the lower end of the third circuit breaker is provided with a third isolation grounding device, and the upper end of the third circuit breaker is provided with a fourth isolation grounding device; the upper end of the second circuit breaker is provided with a fifth isolation grounding device, the lower end of the second circuit breaker is provided with a sixth isolation grounding device, the first branch bus comprises a first branch bus first connecting part connected between the first main bus and the first isolation grounding device and a first branch bus second connecting part connected between the second isolation grounding device and the third isolation grounding device and extending along the left-right direction, and the second branch bus comprises a second branch bus first connecting part connected between the second main bus and the sixth isolation grounding device and a second branch bus second connecting part connected between the fourth isolation grounding device and the fifth isolation grounding device and extending along the left-right direction.
6. The gas-insulated metal-enclosed switchgear device according to claim 5, wherein: the first wire outlet end is arranged on the second connecting part of the first branch bus, and the second wire outlet end is arranged on the second connecting part of the second branch bus.
7. The gas-insulated metal-enclosed switchgear device according to claim 5, wherein: the first wire outlet end is connected to the right end of the third isolation grounding device; and the second wire outlet end is connected to the left end of the fourth isolation grounding device.
8. The gas-insulated metal-enclosed switchgear device according to claim 5, wherein: the first wire outlet end is connected to the left end of the second isolation grounding device; the second wire outlet end is connected to the right end of the fifth isolation grounding device.
9. Gas-insulated metal-enclosed switchgear device according to any of the claims 1 to 8, characterized in that: the single-phase first main bus and the single-phase second main bus of each GIS are arranged in parallel at intervals from top to bottom, and the single-phase main buses of each GIS are arranged in parallel at intervals along the front-back direction.
10. The gas-insulated metal-enclosed switchgear device according to claim 9, characterized in that: in the height direction, the first branch bus, the second branch bus, the first breaker and the second breaker of each GIS single phase are positioned between the first main bus and the second main bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810785960.1A CN110729635B (en) | 2018-07-17 | 2018-07-17 | Gas-insulated metal-enclosed switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810785960.1A CN110729635B (en) | 2018-07-17 | 2018-07-17 | Gas-insulated metal-enclosed switchgear |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131835A (en) * | 1994-12-28 | 1996-09-25 | 株式会社日立制作所 | Gas insulated switchgear device |
| CN101013799A (en) * | 2005-12-27 | 2007-08-08 | 日本Ae帕瓦株式会社 | Gas-insulated switchgear device |
| CN201075601Y (en) * | 2007-07-20 | 2008-06-18 | 西安电力机械制造公司 | Gas insulated metal sealing switchgear |
| CN101861688A (en) * | 2007-11-29 | 2010-10-13 | 三菱电机株式会社 | Gas insulated switchgear |
| CN204068014U (en) * | 2014-07-02 | 2014-12-31 | 新东北电气集团高压开关有限公司 | 800kV Cubicle Gas-Insulated Switchgear |
-
2018
- 2018-07-17 CN CN201810785960.1A patent/CN110729635B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131835A (en) * | 1994-12-28 | 1996-09-25 | 株式会社日立制作所 | Gas insulated switchgear device |
| CN101013799A (en) * | 2005-12-27 | 2007-08-08 | 日本Ae帕瓦株式会社 | Gas-insulated switchgear device |
| CN201075601Y (en) * | 2007-07-20 | 2008-06-18 | 西安电力机械制造公司 | Gas insulated metal sealing switchgear |
| CN101861688A (en) * | 2007-11-29 | 2010-10-13 | 三菱电机株式会社 | Gas insulated switchgear |
| CN204068014U (en) * | 2014-07-02 | 2014-12-31 | 新东北电气集团高压开关有限公司 | 800kV Cubicle Gas-Insulated Switchgear |
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| CN110729635B (en) | 2022-04-19 |
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