CN114447871A - Method for butting newly-built GIS bus with existing GIS bus and GIS bus system - Google Patents

Method for butting newly-built GIS bus with existing GIS bus and GIS bus system Download PDF

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Publication number
CN114447871A
CN114447871A CN202011191781.9A CN202011191781A CN114447871A CN 114447871 A CN114447871 A CN 114447871A CN 202011191781 A CN202011191781 A CN 202011191781A CN 114447871 A CN114447871 A CN 114447871A
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CN
China
Prior art keywords
bus
reserved
joint
gis
barrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011191781.9A
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Chinese (zh)
Inventor
刘锋
李建征
路继伟
李晓培
曾春艳
牛碧野
王广源
舒金磊
杨永欢
段阿利
陈瑞旭
季新明
张克选
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Pingzhi High Voltage Switchgear Co ltd
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Original Assignee
Henan Pingzhi High Voltage Switchgear Co ltd
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Henan Pingzhi High Voltage Switchgear Co ltd, State Grid Corp of China SGCC, Pinggao Group Co Ltd filed Critical Henan Pingzhi High Voltage Switchgear Co ltd
Priority to CN202011191781.9A priority Critical patent/CN114447871A/en
Publication of CN114447871A publication Critical patent/CN114447871A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0358—Connections to in or out conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings

Abstract

The invention relates to a method for butting a newly-built GIS bus with an existing GIS bus and a GIS bus system. The GIS bus system comprises an existing GIS bus, a newly-built GIS bus and a detachable bus; the GIS bus reserved joint barrel is used for being connected to a reserved bus and is provided with a butt joint end which is butted and communicated with the detachable bus; the reserved cover plate is used for plugging the butt joint end of the reserved joint barrel to form an independent closed air chamber; the reserved joint is arranged on the insulator at the joint of the reserved bus and the reserved joint barrel, is positioned in the reserved joint barrel and is used for connecting corresponding central conductors; and the reserved joint barrel is provided with an inflation and deflation device. The reserved joint barrel can be directly connected to the butt joint end of a reserved bus of the GIS when the GIS is built, and the barrel cover plate on the reserved joint barrel is directly detached during GIS expansion, so that the butt joint of the reserved joint barrel and the detachable bus can be realized, the expansion of the GIS is realized, and the butt joint operation efficiency is favorably improved.

Description

Method for butting newly-built GIS bus with existing GIS bus and GIS bus system
Technical Field
The invention relates to a method for butting a newly-built GIS bus with an existing GIS bus and a GIS bus system.
Background
Gis (gas Insulated switchgear), i.e., gas Insulated metal-enclosed switchgear, including bus bars, circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, cable terminals, and inlet and outlet bushings, is widely used in substations. With the rapid development of national electric power utilities, most of the existing GIS/HGIS projects need to be expanded and limited by power failure time, new expanded GIS equipment needs to be completely installed, and can be in butt joint with the existing GIS equipment after the test is finished, so that the bus butt joint efficiency of the existing GIS (first-stage equipment) and the newly-built GIS (second-stage equipment) is low. And because of the particularity of the product, a high-voltage test is needed after the newly-built GIS is installed, the existing GIS bus and the newly-built GIS bus are required to be isolated from each other, and the newly-built GIS is butted with the existing GIS after the independent test is finished.
Chinese patent document No. CN101582568B discloses a docking apparatus and method for GIS equipment, wherein, for newly-built GIS bus (i.e. second-stage equipment in the above patent document), in order to satisfy high-voltage test, a transportation cover plate at the end of the second-stage equipment needs to be removed and a docking bus and a test end need to be added before the test, after the test is completed, the test end is removed, and a detachable bus is added between the test end and a reserved bus of the existing GIS bus (i.e. first-stage equipment in the above patent document), the detachable bus is a structure commonly used in GIS bus and comprises a shell, a corrugated pipe and a central conductor, the central conductor comprises two connecting conductors and a detachable conductor located between the two connecting conductors, and the central conductor can be conveniently dismounted. However, for the existing GIS bus, after the connecting bus between the reserved bus and the main bus is removed, a sealing cover needs to be added on the end of the reserved bus, and when the detachable conductor is installed, the sealing cover needs to be removed again, which affects the efficiency of butt joint operation; meanwhile, the detachable bus needs to be independently connected with a gas charging and discharging valve to perform gas treatment operation, and the butt joint operation efficiency can be affected.
In addition, generally, the pressure of the insulating gas inside the GIS bus is 0.4-0.6 mpa, and according to the operating specification, the insulator is not allowed to be operated when one side of the insulator is at zero pressure and the other side of the insulator is at rated insulating gas pressure, otherwise, the insulator may be damaged due to vibration, collision and the like, and the reliability of the equipment is affected. Therefore, before a newly-built GIS is tested, because the insulator at the rated pressure air chamber is exposed outside, the rated pressure air chamber of the newly-built GIS needs to be exhausted and depressurized, the rated pressure air chamber and the butt-joint bus also need to be inflated during the test, the butt-joint bus of the newly-built GIS needs to be exhausted after the test is finished and before the butt-joint, and the butt-joint bus and the detachable bus of the newly-built GIS need to be inflated after the butt-joint. Thus, the gas treatment is frequently carried out in the butt joint operation process, the operation efficiency and the operation cost are seriously influenced, and the requirement of reducing the power failure time as much as possible in the butt joint operation is not met.
Disclosure of Invention
The invention aims to provide a GIS bus system, which solves the problem of low operation efficiency in the existing GIS bus system butt joint process; meanwhile, the invention also aims to provide a method for butting the newly-built GIS bus with the existing GIS bus, which solves the problems of low operation efficiency and high cost of the existing butting method.
The GIS bus system adopts the following technical scheme:
the GIS bus system comprises an existing GIS bus, a newly-built GIS bus and a detachable bus;
the existing GIS bus comprises a reserved bus, closed insulators are arranged at two ends of the reserved bus, so that the reserved bus forms an independent closed air chamber, and an air charging and discharging device is arranged on the reserved bus;
the detachable bus is used for being connected between a newly-built GIS bus and an existing GIS bus, and comprises a corrugated pipe and a central conductor, wherein the central conductor comprises two connecting conductors and a detachable conductor positioned between the two connecting conductors;
existing GIS bus bars also include:
the reserved joint barrel is connected to the reserved bus and provided with a butt joint end which is in butt joint and communication with the detachable bus;
the reserved cover plate is used for plugging the butt joint end of the reserved joint barrel to form an independent closed air chamber;
the reserved joint is arranged on the insulator at the joint of the reserved bus and the reserved joint barrel, is positioned in the reserved joint barrel and is used for connecting corresponding central conductors;
and the reserved joint barrel is provided with an inflation and deflation device.
Has the advantages that: by adopting the technical scheme, the reserved joint cylinder can be directly connected to the butt joint end of a reserved bus of the GIS when the existing GIS is built, the cylinder body is sealed by the cylinder body sealing cover, and the insulation protection requirement of the bus is met by filling insulation gas with rated pressure in the reserved joint cylinder when the existing GIS bus runs; when the GIS is expanded, the cylinder cover plate on the reserved joint cylinder is directly detached, so that the butt section of the reserved joint cylinder can be butted with the detachable bus, the expansion of the GIS is realized, and compared with the prior art, a sealing cover does not need to be temporarily installed during butt joint operation, and the operation efficiency is favorably improved; and, reserve a joint section of thick bamboo and can dismantle the inner chamber intercommunication of generating line after the generating line is connected with, can realize simultaneously that the inside evacuation of a joint section of thick bamboo and the detachable generating line of reserving connects and aerify, and the reservation that increases connects a section of thick bamboo can not occupy extra inflation and deflation time.
As a preferred technical scheme: and a communicating pipeline is arranged between the reserved joint barrel and the reserved bus, and an on-off valve is arranged on the communicating pipeline.
Has the advantages that: when the on-off valve on the communicating pipeline is closed, the reserved joint cylinder and the reserved bus can be isolated, air is prevented from mixing in the reserved bus or gas leakage is avoided, and when the on-off valve on the communicating pipeline is opened, the reserved joint cylinder and the reserved bus can be communicated, so that the reserved joint cylinder and the reserved bus can be simultaneously inflated, a barometer can be saved, the connection times of inflation and deflation equipment can be reduced, and the efficiency of butt joint operation is further improved.
As a preferred technical scheme: the on-off valve comprises a joint barrel valve arranged on the reserved joint barrel and a reserved bus valve arranged on the reserved bus, and the joint barrel valve is connected with the reserved bus valve in parallel;
the end of the joint cylinder valve far away from the reserved joint cylinder and the end of the reserved bus valve far away from the reserved bus are connected to the tail end valve at the same time and are connected with the tail end valve in series.
Has the advantages that: by adopting the technical scheme, two seals can be formed between the reserved bus and the outside through the reserved bus valve and the air charging and discharging device, and the reliability is good; and moreover, the reserved joint barrel can be independently vacuumized through the reserved bus valve and the joint barrel valve.
As a preferred technical scheme: the GIS bus bar system also includes a connector shield having a smooth outer peripheral surface for capping onto the reserved connector to shield the reserved connector.
Has the advantages that: by adopting the technical scheme, the insulating property between the reserved joint and the shell can be ensured.
As a preferred technical scheme: newly-built GIS generating line include:
the transition bus is used for forming a butt joint end of a newly-built GIS bus, and two ends of the transition bus are provided with closed insulators so that the transition bus forms an independent air chamber;
the transition joint is arranged on the insulator of the transition bus, is positioned at the butt joint end of the newly-built GIS bus and is used for connecting a corresponding central conductor;
and the transition bus is provided with an inflation and deflation device.
Has the advantages that: by adopting the technical scheme, the transition joint is at zero pressure, and the transition bus is arranged to avoid gas treatment operation on the rated pressure gas chamber, so that the gas treatment workload is reduced.
As a preferred technical scheme: the GIS bus system also includes a joint shield having a smooth outer peripheral surface for capping onto the transition joint to shield the transition joint.
Has the advantages that: by adopting the technical scheme, the insulating property between the transition joint and the shell can be ensured.
As a preferred technical scheme: GIS generating line system still includes test device, test device includes:
a test cartridge for connection to a distal end of a transition busbar;
the test cylinder cover plate is used for plugging the test cylinder to form an independent closed air chamber;
and the test cylinder is provided with an air charging and discharging device.
Has the advantages that: adopt above-mentioned technical scheme to be convenient for test device's manufacturing.
The invention discloses a docking method of a newly-built GIS bus and an existing GIS bus, which adopts the following technical scheme:
the method comprises the steps that a newly-built GIS bus is in butt joint with an existing GIS bus, when the existing GIS bus is established, a reserved joint cylinder is arranged at the butt joint end of the reserved bus of the existing GIS bus, and the reserved joint cylinder is used for being in butt joint with and communicated with a detachable bus;
meanwhile, a reserved joint is arranged on an insulator at the joint of the reserved bus and the reserved joint barrel, and the reserved joint is used for connecting a corresponding central conductor;
the reserved joint barrel is plugged by using a reserved cover plate, so that the reserved joint barrel forms an independent closed air chamber;
when a newly-built GIS bus is in butt joint with an existing GIS bus, the reserved joint barrel is decompressed through an air charging and discharging device on the reserved joint barrel, a reserved cover plate is opened, and a detachable bus is connected to a butt joint end of the reserved joint barrel.
Has the advantages that: by adopting the technical scheme, the reserved joint cylinder is directly connected to the butt joint end of a reserved bus of the GIS when the existing GIS is built, the cylinder body is sealed by the cylinder body sealing cover, and the insulation protection requirement of the bus is met by filling insulation gas with rated pressure in the reserved joint cylinder when the existing GIS bus runs; when the GIS is expanded, the cylinder cover plate on the reserved joint cylinder is directly detached, so that the butt section of the reserved joint cylinder can be butted with the detachable bus, the expansion of the GIS is realized, and compared with the prior art, a sealing cover does not need to be temporarily installed during butt joint operation, and the operation efficiency is favorably improved; and the reserved joint cylinder is communicated with the inner cavity of the detachable bus after being connected with the detachable bus, so that vacuumizing and inflation inside the reserved joint cylinder and the detachable bus can be realized simultaneously, and the added reserved joint cylinder does not occupy extra inflation and deflation time.
As a preferred technical scheme: a communicating pipeline is arranged between the reserved joint barrel and the reserved bus, and an on-off valve is arranged on the communicating pipeline;
when the on-off valve is closed, the reserved joint barrel and the reserved bus are isolated, and air is prevented from being mixed in the reserved bus or gas is prevented from leaking;
when the on-off valve is opened, the reserved joint cylinder and the reserved bus are communicated, and meanwhile, the reserved joint cylinder and the reserved bus are inflated.
Has the beneficial effects that: when the on-off valve on the communicating pipeline is closed, the reserved joint barrel and the reserved bus can be isolated, air is prevented from being mixed in the reserved bus or gas leakage is avoided, when the on-off valve on the communicating pipeline is opened, the reserved joint barrel and the reserved bus can be communicated, so that the reserved joint barrel and the reserved bus can be inflated simultaneously, pressure detection in the reserved joint barrel and the reserved bus is realized by utilizing one barometer, the barometer is favorably saved, the cost is reduced, the connection times of inflation and deflation equipment can be reduced, and the efficiency of butt joint operation is further improved. As a preferred technical scheme: when a newly-built GIS bus is built, a transition bus is arranged at the butt joint end of the newly-built GIS bus, and closed insulators are arranged at the two ends of the transition bus, so that the transition bus forms an independent air chamber;
meanwhile, a transition joint is arranged at the butt joint end of the newly-built GIS bus, and the transition joint is used for connecting corresponding central conductors;
during docking, the corresponding center conductor of the detachable bus bar is connected to the transition joint.
Has the advantages that: by adopting the technical scheme, the transition joint is at zero pressure, and the transition bus is arranged to avoid gas treatment operation on the rated pressure gas chamber, so that the gas treatment workload is reduced.
For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.
Drawings
Fig. 1 is a schematic structural diagram of a GIS bus system in embodiment 1 of the present invention before the existing GIS bus and a newly built GIS bus are butted;
FIG. 2 is a schematic structural diagram of the existing GIS bus and the newly-built GIS bus in FIG. 1 after being butted;
FIG. 3 is a schematic structural diagram of a butt joint part before the existing GIS bus and a newly-built GIS bus are in butt joint;
FIG. 4 is a schematic structural view before the detachable bus bar is attached;
fig. 5 is a schematic diagram of the connection relationship between the detachable bus and the existing GIS bus and the newly-built GIS bus.
The names of the components corresponding to the corresponding reference numerals in the drawings are:
10-existing GIS bus, 11-reserved bus, 12-reserved joint cylinder, 13-reserved cover plate, 14-reserved joint, 15-reserved side shield cover, 16-gas adsorption device, 17-explosion-proof membrane, 18-first air charging and discharging device, 19-first valve, 110-insulating joint, 111-second valve, 112-third valve, 113-gas gauge, 114-second air charging and discharging device, 115-joint cylinder valve, 116-reserved bus valve, 117-end valve, 20-newly-built GIS bus, 21-transition bus, 22-transition joint, 23-newly-built side shield cover, 24-fourth air charging and discharging device, 30-detachable bus, 31-cylinder, 32-central conductor, 33-connecting conductor, 34-detachable conductor, 35-corrugated pipe, 40-test device, 41-test cylinder, 42-test cylinder cover plate, 43-third inflation and deflation device and 50-insulator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the GIS bus system of the present invention:
as shown in fig. 1 and fig. 2, the GIS bus system includes an existing GIS bus 10, a newly-built GIS bus 20, a detachable bus 30 and a testing device 40, and the existing GIS bus 10 and the newly-built GIS bus 20 are demarcated by a mark composed of a triangle and a straight line in fig. 1, fig. 2 and fig. 5. The detachable bus 30 (as shown in fig. 2) is used for connecting between the newly-built GIS bus 20 and the existing GIS bus 10 during docking, and is a structure in the prior art; the testing device 40 is used for temporarily connecting to the transition bus 21 of the newly-built GIS bus 20 before the existing GIS bus 10 is butted with the newly-built GIS bus 20, and testing the newly-built GIS bus 20.
The existing GIS bus 10 comprises a reserved bus 11, a reserved joint barrel 12, a reserved cover plate 13 and a reserved joint 14 (the reserved joint 14 is shown in figures 4 and 5), and a rated pressure air chamber is connected to the left side of the reserved bus 11 in the figures, namely the side far away from the reserved joint barrel 12. Two ends of the reserved bus 11 are provided with closed insulators 50, the insulators 50 are closed basin-type insulators, so that the reserved bus 11 forms an independent closed air chamber, and the reserved joint 14 is in a plug-in joint form and is matched with a corresponding plug-in hole when in use; the reserved joint 14 is disposed on one of the insulators 50 adjacent to the reserved joint barrel 12, i.e., the insulator 50 at the butt joint of the reserved bus bar 11 and the reserved joint barrel 12, and is located inside the reserved joint barrel 12 for electrically conductive connection with the center conductor 32 of the detachable bus bar 30. The existing GIS bus 10 further comprises a reserved side shielding case 15, wherein the reserved side shielding case 15 is provided with an inner hole, is sleeved on the reserved joint 14 and is fixed with the reserved joint 14. The reserve-side shield shell 15 has a smooth outer peripheral surface for capping to the reserve joint 14 to shield the reserve joint 14. The reserved cover plate 13 is plugged on the butt joint end of the reserved joint barrel 12, so that the reserved joint barrel 12 forms an independent closed air chamber. In addition, as shown in fig. 3 and 4, since the reserved joint barrel 12 is temporarily in an open state during the butt joint, a gas adsorption device 16 is provided on the reserved joint barrel 12 in order to prevent moisture from entering. The barrel 31 of the reserved joint barrel 12 is also provided with an explosion-proof membrane 17 for improving safety. The gas adsorption device 16 and the explosion-proof membrane 17 are arranged on the bus tube body in the prior art, and the specific structure is not specifically described here.
The reserved bus 11 is provided with a first inflation and deflation device 18, as shown in fig. 1 and 2, the first inflation and deflation device 18 comprises a first valve 19, an insulating joint 110, a second valve 111, a third valve 112 and a barometer 113, the first valve 19, the insulating joint 110, the second valve 111 and the third valve 112 are sequentially connected through a pipeline, and the barometer 113 is connected between the second valve 111 and the third valve 112. The first valve 19 is formed by a gas valve seat arranged on the peripheral surface of the reserved bus 11 and is fixedly connected to the reserved bus 11; the insulation joint 110 is connected in series on the pipeline to play an insulation role, so as to prevent the second valve 111, the third valve 112 and the barometer 113 from being electrified. In order to reduce interference with other structures, the first inflation and deflation device 18 labeled in fig. 1 and 2 is only shown in part, which corresponds to the gas valve seat. A second inflation and deflation device 114 is arranged on the reserved joint barrel 12, the second inflation and deflation device 114 comprises a joint barrel valve 115 arranged on the reserved joint barrel 12 and a reserved bus valve 116 arranged on the reserved bus 11, and the joint barrel valve 115 is connected with the reserved bus valve 116 in parallel; the end of the joint barrel valve 115 far away from the reserved joint barrel 12 and the end of the reserved bus valve 116 far away from the reserved bus 11 are simultaneously connected to the end valve 117 and are connected with the end valve 117 in series. The reserved bus valve 116 and the joint cylinder valve 115 together form an on-off valve for forming a communication pipeline between the reserved joint cylinder 12 and the reserved bus 11. The gas pressure gauge 113 is used to observe the pressure in the corresponding gas chamber.
The newly-built GIS bus 20 comprises a transition bus 21 and a transition joint 22, wherein the transition bus 21 is used for forming a butt joint end of the newly-built GIS bus 20, and two ends of the transition bus 21 are also provided with closed insulators 50, so that the transition bus 21 forms an independent air chamber; the right side of the transition bus 21 in the figure is connected with a rated pressure air chamber. The transition joint 22 is in the form of a jack and is arranged on the insulator 50 at the left end of the transition bus bar 21 and is located at the butt joint end of the newly-built GIS bus bar 20 for connecting with the corresponding central conductor 32. Similar to the existing GIS bus bar 10, the newly-built GIS bus bar 20 also includes a shield, i.e., a newly-built side shield 23, and the newly-built side shield 23 has a plug-in end, which is plugged into the transition joint 22 and fixed with the transition joint 22.
The testing device 40 comprises a testing cylinder 41 and a testing cylinder cover plate 42, wherein the testing cylinder 41 is used for being connected to the tail end of the transition bus 21, and the testing cylinder cover plate 42 is used for plugging the testing cylinder 41, so that the testing cylinder 41 forms an independent closed air chamber. The transition bus 21 and the test cylinder 41 are respectively provided with a third inflation and deflation device 43 and a fourth inflation and deflation device 24, the structures of the inflation and deflation devices on the transition bus 21 and the test cylinder 41 are the same as those on the reserved bus 11, and the inflation and deflation devices comprise a first valve 19, an insulating joint 110, a second valve 111, a third valve 112 and a pressure gauge 113, which are not described in detail herein.
The GIS bus bar system also comprises a detachable bus bar 30, wherein the detachable bus bar 30 is used for connecting between the newly-built GIS bus bar 20 and the existing GIS bus bar 10 and comprises a cylinder body 31 and a central conductor 32, the cylinder body 31 comprises a corrugated pipe, and the central conductor 32 comprises two connecting conductors 33 and a detachable conductor 34 positioned between the two connecting conductors 33. The left end sleeve of the left connecting conductor 33 in the figure is arranged on the reserved joint 14, and the right connecting conductor 33 is inserted on the transition joint 22. The detachable conductors 34 are provided with grooves, and the grooves are provided with fasteners, and the detachable conductors can be detachably fixed on the detachable buses 30 on two sides through the fasteners. The notch of the groove is provided with a sealing cover, which is beneficial to uniform electric field.
The construction process of the GIS bus system comprises the following steps:
when an existing GIS bus 10 is constructed, a reserved joint cylinder 12 is arranged at the butt joint end of a reserved bus 11 of the existing GIS bus 10, meanwhile, a reserved joint 14 is arranged on an insulator 50 at the butt joint of the reserved bus 11 and the reserved joint cylinder 12, and the reserved joint 14 is used for connecting with a connecting conductor 33 of a corresponding central conductor 32; the reserved joint barrel 12 is sealed by a reserved cover plate 13, so that the reserved joint barrel 12 forms an independent closed air chamber. Insulating gas with rated pressure is filled in the reserved bus 11 and the reserved joint cylinder 12, so that the existing GIS bus 10 can be ensured to be normally used in a charged mode.
After the newly-built GIS bus 20 is built, the testing device 40 is installed on the transition bus 21 in a butt joint mode, and after the newly-built GIS equipment is installed, the testing device 40 serves as the tail end of the newly-built GIS bus 20 to complete all newly-built GIS test contents.
Before butt joint:
after the new GIS is completed, the gas in the test apparatus 40 is recovered by the third gas charging and discharging device 43 of the test apparatus 40, and the gas pressure in the gas chamber is reduced to zero pressure (i.e., equal to the atmospheric pressure).
And (3) recovering the gas in the installed GIS bus reserved joint barrel 12 through a second gas charging and discharging device 114 (opening a joint barrel valve 115 and a tail end valve 117, and closing a reserved bus valve 116) on the reserved joint barrel 12 on the GIS bus side, and reducing the gas pressure of the gas chamber to zero pressure.
The gas in the reserved bus 11 is recovered by pumping through the first air charging and discharging device 18 on the reserved bus 11 on the GIS bus side, and the gas pressure of the gas chamber is reduced to be micro pressure (0.02-0.05 MPa). The reduction of the micro-pressure is beneficial to reducing the air extraction and exhaust time, and can improve the pressure difference on two sides of the insulator to a certain extent. In other embodiments, the gas pressure in the gas chamber can be reduced to zero pressure.
The gas in the transition bus 21 is recovered by the fourth gas charging and discharging device 24 on the transition bus 21 on the newly built GIS bus side, and the gas pressure in the gas chamber is reduced to zero pressure. In other embodiments, the gas pressure in the gas chamber can be reduced to a micro pressure (0.02-0.05 MPa).
During butt joint:
and (4) removing the reserved cover plate 13 on the side where the GIS bus is installed and removing the reserved side shielding case 15 inside.
And (5) removing the test device 40 on the newly-built GIS bus side.
The detachable bus bar 30 is installed on the insulator 50 of the transition bus bar 21 of the newly-built GIS bus bar 20, and the detachable bus bar 30 is compressed by the connecting screw rod on the detachable bus bar 30 to form an installation opening, and the two connecting conductors 33 are respectively installed on the insulators 50 on the left and right sides.
The detachable conductor 34 is mounted between the two connecting conductors 33 by bolts.
The detachable bus bar is adjusted to a proper size range through a connecting screw rod, the detachable bus bar 30 is connected to the butt joint end of the reserved joint barrel 12, and the reserved joint barrel 12 is used for being in butt joint and communication with the detachable bus bar 30. Of course, the reserved joint barrel 12 is a barrel structure, and the communication with the detachable bus bar 30 means that the inner cavity of the reserved joint barrel 12 is communicated with the inner cavity of the barrel 31 of the detachable bus bar 30.
When in inflation:
and opening the joint cylinder valve 115, the tail end valve 117 and the reserved bus valve 116, increasing the gas pressure of the reserved joint cylinder 12 and the reserved bus 11 to the rated gas pressure simultaneously through the second inflation and deflation device 114 on the reserved joint cylinder 12, and realizing the pressure detection in the reserved joint cylinder 12 and the reserved bus 11 by using the same barometer 113 during inflation. Of course, in other embodiments, the reserved pipe joint 12 may be inflated through the end valve 117, and the reserved bus 11 may be inflated through the third valve 112.
The fourth air charging and discharging device 24 on the transition bus 21 charges air into the transition bus 21, and the air pressure of the air chamber is increased to the rated air pressure.
And finishing the whole butt joint process.
Embodiment 2 of the GIS bus system of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, a communication pipeline is formed between the inflation and deflation device on the reserved joint barrel 12 and the reserved bus bar, but in this embodiment, the inflation and deflation device on the reserved joint barrel 12 is an independent inflation and deflation device.
Embodiment 3 of the GIS bus system of the present invention:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, the communication pipeline between the inflation and deflation device on the reserved joint barrel 12 and the reserved bus includes two valves, and in this embodiment, the communication pipeline between the inflation and deflation device on the reserved joint barrel 12 and the reserved bus is formed by only one valve and a corresponding pipeline.
Embodiment 4 of the GIS bus system of the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the charging and discharging device on the reserved bus 11, the transition bus 21 and the test tube 41 includes the first valve 19, the second valve 111 and the third valve 112, but in this embodiment, the charging and discharging device includes only one valve.
Embodiment 5 of the GIS bus system of the present invention:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, the testing device includes a testing cylinder and a testing cylinder cover plate, but in this embodiment, the testing cylinder and the testing cylinder cover plate may also be an integral structure, that is, a cylinder body with a blind end at one end.
The embodiment of the invention relates to a docking method of a newly-built GIS bus 20 and an existing GIS bus 10, which comprises the following steps: an embodiment of a method for docking the newly-built GIS bus 20 with the existing GIS bus 10 is a construction process of the GIS bus system, and details are not described here to avoid repetition. In other embodiments of the docking method, the newly-built GIS bus may not include the transition bus, and during docking, the rated pressure air chamber on the right side of the transition bus in the above embodiments is depressurized and then connected with the detachable bus.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.

Claims (10)

  1. The GIS bus system comprises an existing GIS bus (10), a newly-built GIS bus (20) and a detachable bus (30);
    the existing GIS bus (10) comprises a reserved bus (11), wherein closed insulators (50) are arranged at two ends of the reserved bus (11) to enable the reserved bus (11) to form an independent closed air chamber, and an air charging and discharging device is arranged on the reserved bus (11);
    the detachable bus (30) is used for connecting between a newly-built GIS bus (20) and an existing GIS bus (10), and comprises a corrugated pipe (35) and a central conductor (32), wherein the central conductor (32) comprises two connecting conductors (33) and a detachable conductor (34) positioned between the two connecting conductors (33);
    it is characterized in that the preparation method is characterized in that,
    the existing GIS bus (10) further comprises:
    a reserved joint barrel (12) which is connected to the reserved bus bar (11) and is provided with a butt joint end butted and communicated with the detachable bus bar (30);
    the reserved cover plate (13) is used for plugging the butt joint end of the reserved joint barrel (12) to enable the reserved joint barrel (12) to form an independent closed air chamber;
    the reserved joint (14) is arranged on an insulator (50) at the joint of the reserved bus (11) and the reserved joint barrel (12), is positioned in the reserved joint barrel (12), and is used for connecting a corresponding central conductor (32);
    an air charging and discharging device is arranged on the reserved joint barrel (12).
  2. 2. The GIS bus system according to claim 1, wherein a communication pipeline is arranged between the reserved joint barrel (12) and the reserved bus (11), and an on-off valve is arranged on the communication pipeline.
  3. 3. The GIS bus system according to claim 2, wherein the on-off valve comprises a joint barrel valve (115) arranged on the reserved joint barrel (12), and further comprises a reserved bus valve (116) arranged on the reserved bus (11), wherein the joint barrel valve (115) is connected with the reserved bus valve (116) in parallel;
    one end of the joint cylinder valve (115) far away from the reserved joint cylinder (12) and one end of the reserved bus valve (116) far away from the reserved bus (11) are simultaneously connected to the tail end valve (117) and are connected with the tail end valve (117) in series.
  4. 4. The GIS bus system of any of claims 1 to 3 further comprising a splice shield having a smooth outer perimeter for capping onto the reserved splice (14) to shield the reserved splice (14).
  5. 5. The GIS bus system of any of claims 1 to 3 wherein the newly created GIS bus (20) comprises:
    the transition bus (21), the transition bus (21) is used for forming the butt joint end of newly-built GIS bus (20), the both ends of the transition bus (21) are equipped with the closed insulator (50), make the transition bus (21) form the independent air chamber;
    the transition joint (22) is arranged on the insulator (50) of the transition bus (21), is positioned at the butt joint end of the newly-built GIS bus (20), and is used for connecting the corresponding central conductor (32);
    and an air charging and discharging device is arranged on the transition bus (21).
  6. 6. The GIS bus system of claim 5 further comprising a joint shield having a smooth outer perimeter for capping onto the transition joint (22) to shield the transition joint (22).
  7. 7. The GIS bus system of claim 5 further comprising a test device (40), the test device (40) comprising:
    a test cartridge (41) for connection to the end of the transition busbar (21);
    the test cylinder cover plate (42) is used for plugging the test cylinder (41) to enable the test cylinder (41) to form an independent closed air chamber;
    and the test cylinder (41) is provided with an air charging and discharging device.
  8. 8. The method for butting the newly-built GIS bus (20) with the existing GIS bus (10) is characterized in that when the existing GIS bus (10) is built, a reserved joint cylinder (12) is arranged at the butting end of a reserved bus (11) of the existing GIS bus (10), and the reserved joint cylinder (12) is used for butting and communicating with a detachable bus (30);
    meanwhile, a reserved joint (14) is arranged on an insulator (50) at the joint of the reserved bus (11) and the reserved joint barrel (12), and the reserved joint (14) is used for connecting a corresponding central conductor (32);
    the reserved joint barrel (12) is plugged by using a reserved cover plate (13), so that the reserved joint barrel (12) forms an independent closed air chamber;
    when a newly-built GIS bus (20) is in butt joint with an existing GIS bus (10), the reserved joint barrel (12) is decompressed through an air charging and discharging device on the reserved joint barrel (12), a reserved cover plate (13) is opened, and a detachable bus (30) is connected to a butt joint end of the reserved joint barrel (12).
  9. 9. The butt joint method according to claim 8, wherein a communication pipeline is arranged between the reserved joint barrel (12) and the reserved bus (11), and an on-off valve is arranged on the communication pipeline;
    when the on-off valve is closed, the reserved joint barrel (12) and the reserved bus (11) are isolated, and air is prevented from being mixed in the reserved bus (11) or gas is prevented from leaking;
    when the on-off valve is opened, the reserved joint barrel (12) and the reserved bus (11) are communicated, and meanwhile, the reserved joint barrel (12) and the reserved bus (11) are inflated.
  10. 10. The butt joint method according to the claim 8 or 9, characterized in that when building the newly-built GIS bus (20), the transition bus (21) is arranged at the butt joint end of the newly-built GIS bus (20), and the closed insulators (50) are arranged at the two ends of the transition bus (21) to make the transition bus (21) form an independent air chamber;
    meanwhile, a transition joint (22) is arranged at the butt joint end of the newly-built GIS bus (20), and the transition joint (22) is connected with a corresponding central conductor (32);
    when mated, the respective center conductors (32) of the detachable bus bars (30) are connected to the transition joint (22).
CN202011191781.9A 2020-10-30 2020-10-30 Method for butting newly-built GIS bus with existing GIS bus and GIS bus system Pending CN114447871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011191781.9A CN114447871A (en) 2020-10-30 2020-10-30 Method for butting newly-built GIS bus with existing GIS bus and GIS bus system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011191781.9A CN114447871A (en) 2020-10-30 2020-10-30 Method for butting newly-built GIS bus with existing GIS bus and GIS bus system

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CN114447871A true CN114447871A (en) 2022-05-06

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Country Status (1)

Country Link
CN (1) CN114447871A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101582568A (en) * 2009-06-24 2009-11-18 河南平高电气股份有限公司 Butting unit for GIS equipment and method thereof
CN201438608U (en) * 2009-06-24 2010-04-14 河南平高电气股份有限公司 Detachable bus for ultra-high voltage GIS equipment
KR20110075823A (en) * 2009-12-29 2011-07-06 주식회사 효성 Bus bar unit of gas insulated switchgear
CN202308895U (en) * 2011-10-31 2012-07-04 中国西电电气股份有限公司 Detachable maintenance test unit for gas insulated metal enclosed switchgear
CN203589647U (en) * 2013-09-24 2014-05-07 山东泰开高压开关有限公司 Device capable of dismounting bus
CN104538916A (en) * 2014-11-14 2015-04-22 北京电力设备总厂有限公司 Detachable bus unit and rigid gas insulation electric transmission line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101582568A (en) * 2009-06-24 2009-11-18 河南平高电气股份有限公司 Butting unit for GIS equipment and method thereof
CN201438608U (en) * 2009-06-24 2010-04-14 河南平高电气股份有限公司 Detachable bus for ultra-high voltage GIS equipment
KR20110075823A (en) * 2009-12-29 2011-07-06 주식회사 효성 Bus bar unit of gas insulated switchgear
CN202308895U (en) * 2011-10-31 2012-07-04 中国西电电气股份有限公司 Detachable maintenance test unit for gas insulated metal enclosed switchgear
CN203589647U (en) * 2013-09-24 2014-05-07 山东泰开高压开关有限公司 Device capable of dismounting bus
CN104538916A (en) * 2014-11-14 2015-04-22 北京电力设备总厂有限公司 Detachable bus unit and rigid gas insulation electric transmission line

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