CN114217183A - GIS cable device - Google Patents
GIS cable device Download PDFInfo
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- CN114217183A CN114217183A CN202111417290.6A CN202111417290A CN114217183A CN 114217183 A CN114217183 A CN 114217183A CN 202111417290 A CN202111417290 A CN 202111417290A CN 114217183 A CN114217183 A CN 114217183A
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- grounding
- switch
- bar
- terminal
- box body
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- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000002955 isolation Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 17
- 238000001514 detection method Methods 0.000 abstract description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 5
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 5
- 241001330002 Bambuseae Species 0.000 abstract description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 5
- 239000011425 bamboo Substances 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cable Accessories (AREA)
Abstract
The application discloses GIS cable device relates to the power transformation technology field, connects a section of thick bamboo and test window including T. Wherein, cover the insulating shield ring on the ground terminal of T connects a section of thick bamboo to improve the not enough local electric field that leads to in air gap and too strong, the problem of insulation breakdown, thereby improve ground terminal's whole insulation withstand voltage level, thereby when carrying out insulation test and trouble finding experiment, need not to use the high-tension bushing core experiment, improve test efficiency. Moreover, the grounding terminal is packaged in the box body of the test window, so that the testing window has certain protection and better safety; and the grounding terminal and the grounding bar group are detachably connected, and the box body is provided with a box door capable of being opened and closed, so that the connection between the grounding terminal and the grounding bar group is released when a test is carried out, and the grounding terminal is connected with the fault detection device for detection, so that the detection test is convenient, and the detection efficiency is further improved.
Description
Technical Field
The application relates to the technical field of power transformation, in particular to a GIS cable device.
Background
With the continuous development of power distribution technology, the cabling of power transmission lines and the GIS of power transformation equipment are increasingly popularized, and the hard connection form of the T-shaped connecting cylinder and the cable is increasingly used in a transformer substation.
Under the condition that the GIS is in hard connection with the cable, if a permanent fault occurs on the cable, the grounding terminal needs to be unfastened for an insulation test and a fault finding test. However, the voltage resistance level of the current grounding terminal is limited, and the insulation breakage point may not be broken, so that a high-voltage bushing is required to be used for testing, and the operation steps comprise: the method comprises the steps of deflation, sleeve dismounting, sleeve mounting, test, sleeve dismounting, sleeve mounting, inflation, GIS air tightness and pressure resistance test, and the whole process is time-consuming and labor-consuming and extremely low in efficiency. Moreover, the conventional grounding terminal lacks certain protection and has low safety.
Disclosure of Invention
In view of this, an object of the present application is to provide a GIS cable device, which solves the problems of low test efficiency and low safety.
In order to achieve the technical purpose, the application provides a GIS cable device which comprises a T-shaped connecting cylinder and a test window;
the T-shaped connecting cylinder comprises a cylinder body, a quick grounding switch, an isolation switch and a grounding terminal;
the isolation switch is arranged in the cylinder body, the first end of the isolation switch is connected with the main transformer, and the second end of the isolation switch is connected with the outgoing cable;
the quick grounding switch is arranged in the cylinder body, and the first end of the quick grounding switch is connected with the first end of the isolation disconnecting link;
the grounding terminal is connected with the second end of the quick grounding switch;
the upper cover of the grounding terminal is provided with an insulating shielding ring;
the test window comprises a box body and a grounding row group;
the box body is arranged on the surface of the cylinder body and is provided with a box door which can be opened and closed;
the grounding terminal is arranged in the box body;
the grounding row group is detachably connected with the grounding terminal.
Furthermore, the dielectric strength of the material of the insulating shielding ring is more than or equal to 20 mm/kV.
Further, the thickness of the insulation shielding ring is 4 mm.
Furthermore, a plurality of through holes are distributed on the insulation shielding ring around the circumference of the central axis of the insulation shielding ring.
Further, the ground row group comprises a transverse ground row and a vertical ground row;
the transverse grounding bar can be inserted into the box body in a drawing manner;
the grounding terminal is detachably connected with the transverse grounding bar;
the vertical grounding bar is arranged outside the box body, and one end of the vertical grounding bar is detachably connected with one end of the transverse grounding bar extending out of the box body.
Furthermore, the grounding terminal is detachably connected with the transverse grounding bar through a screw; or
One end of the vertical grounding bar is detachably connected with one end of the transverse grounding bar extending out of the box body through a screw.
Furthermore, the box door is connected with the box body in an openable and closable manner through an electromagnetic lock.
Furthermore, the opening and closing state of the electromagnetic lock is in linkage fit with the opening and closing state of the isolation disconnecting link and the opening and closing state of the quick grounding switch;
when the isolation disconnecting link is in an open state and the quick grounding switch is in a closed state, the electromagnetic lock is in a power-off open state;
when the isolation disconnecting link is in a closed state and the quick grounding switch is in an open state, the electromagnetic lock is in an electric closed state.
According to the technical scheme, the GIS cable device comprises the T-shaped connecting cylinder and the test window. Wherein, cover the insulating shield ring on the ground terminal of T connects a section of thick bamboo to improve the not enough local electric field that leads to in air gap and too strong, the problem of insulation breakdown, thereby improve ground terminal's whole insulation withstand voltage level, thereby when carrying out insulation test and trouble finding experiment, need not to use the high-tension bushing core experiment, improve test efficiency. Moreover, the grounding terminal is packaged in the box body of the test window, so that the testing window has certain protection and better safety; and the grounding terminal and the grounding bar group are detachably connected, and the box body is provided with a box door capable of being opened and closed, so that the connection between the grounding terminal and the grounding bar group is released when a test is carried out, and the grounding terminal is connected with the fault detection device for detection, so that the detection test is convenient, and the detection efficiency is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a GIS cable device provided in the present application;
fig. 2 is a schematic structural diagram of a grounding terminal of a GIS cable device provided in the present application;
in the figure: 100. a main transformer; 200. an outgoing cable; 11. a barrel; 12. a fast grounding switch; 13. isolating the disconnecting link; 14. a ground terminal; 141. an insulating shield ring; 15. a grounding switch; 21. a box body; 22. a box door; 23. a ground bank group; 231. a transverse ground bar; 232. a vertical ground bar.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a GIS cable device.
Referring to fig. 1 and fig. 2, an embodiment of a GIS cable apparatus provided in an embodiment of the present application includes:
t connects a section of thick bamboo and test window.
The T-joint barrel structure comprises a barrel body 11, a quick grounding switch 12, an isolation switch 13 and a grounding terminal 14.
The isolation switch 13 is installed in the cylinder 11, a first end of the isolation switch 13 is specifically connected to the main transformer 100, and a second end of the isolation switch 13 is specifically connected to a connector lug of an outgoing cable 200 of, for example, 110kV or 220 kV.
The quick grounding switch 12 is arranged in the cylinder body 11, and the first end of the quick grounding switch 12 is connected with the first end of the isolation switch 13; the grounding terminal 14 is connected to the second end of the fast grounding switch 12 through a copper conductor, and the grounding terminals 14 are specifically three, namely, an a-phase grounding terminal, a B-phase grounding terminal and a C-phase grounding terminal. The T-junction cylinder may be additionally provided with an earthing switch 15 as required, the earthing switch 15 is disposed in the cylinder 11, a first end of the earthing switch 15 is connected with a first end of the isolation switch 13, and a second end of the earthing switch 15 is earthed.
With regard to the structural improvement of the ground terminal 14, the insulating shielding ring 141 is covered on the ground terminal, and the problems of too strong local electric field and insulation breakdown caused by insufficient air gap are solved by additionally arranging the insulating shielding ring 141, so that the overall insulation voltage resistance level of the ground terminal 14 is improved, a high-voltage bushing core test is not needed when an insulation test and a fault finding test are carried out, and the test efficiency is improved.
The test window structure comprises a box body 21 and a grounding row group 23.
The casing 21 is attached to the surface of the cylinder 11 and provided with a door 22 that can be opened and closed. The ground terminal 14 is installed in the box body 21, so that the ground terminal 14 has certain protection and better safety.
Furthermore, the ground bar group 23 is detachably connected with the ground terminal 14, so that during testing, the connection between the ground terminal 14 and the ground bar group 23 is released, and the ground terminal 14 is connected with a fault detection device for detection, so that the detection test is convenient, and the detection efficiency is further improved.
The box body and the box cover can be made of stainless steel materials, and are not limited specifically.
The above is a first embodiment of a GIS cable device provided in the present application, and the following is a second embodiment of a GIS cable device provided in the present application, specifically referring to fig. 1 to fig. 2.
The scheme based on the first embodiment is as follows:
further, the dielectric strength of the material of the insulation shielding ring 141 is preferably equal to or greater than 20mm/kV, and the thickness of the insulation shielding ring 141 is preferably 4mm, so that the breakdown voltage of the insulation shielding ring 141 is designed to be much greater than 32 kV.
Further, in order to facilitate mounting and fixing, a plurality of through holes are distributed on the insulating shielding ring 141 around the circumference of the central axis thereof, so that screws on the ground terminal 14 can pass through the through holes, and the insulating shielding ring is fixed on the ground terminal 14 through the screws.
Further, the ground bar group 23 includes a transverse ground bar 231 and a vertical ground bar 232 in terms of structural composition.
The transverse grounding bar 231 is inserted into the box 21 in a drawing manner and is used for connecting the grounding terminals 14 together. The ground terminal 14 is detachably connected to the transverse ground bar 231; the vertical grounding bar 232 is disposed outside the box 21, and one end of the vertical grounding bar and one end of the horizontal grounding bar 231 extending out of the box 21 are detachably connected, and the other end of the vertical grounding bar is grounded.
When a test is required, the connection between each grounding terminal 14 and the transverse grounding bar 231 is firstly released, the connection between the transverse grounding bar 231 and the vertical grounding bar 232 is released, then the transverse grounding bar 231 is pulled out, then the grounding terminal 14 serving as a test phase is connected with the fault detection device, the grounding terminal 14 serving as a non-test phase is connected with the vertical grounding bar 232 through the annealed copper wire, the grounding of the non-test phase is realized, the grounding terminal serving as an A-phase is used as a test phase, the grounding terminal serving as the A-phase is connected with the fault detection device, and the grounding terminal serving as a B-phase and the grounding terminal serving as a C-phase are grounded through the vertical grounding bar 232, so that the overall test is simple and efficient.
Further, the ground terminal 14 may be detachably connected to the transverse ground bar 231 by a screw; similarly, one end of the vertical ground bar 232 may also be detachably connected to one end of the horizontal ground bar 231 extending out of the box 21 through a screw.
Further, the door 22 may be openably and closably connected to the box 21 through an electromagnetic lock, and may be of other opening and closing lock structures, which are not limited specifically.
Further, the open/close state of the electromagnetic lock is in linkage fit with the open/close state of the disconnecting switch 13 and the open/close state of the quick grounding switch 12.
Specifically, when the isolation switch 13 is in the open state and the fast grounding switch 12 is in the closed state, the electromagnetic lock is in the power-off open state. When the isolation switch 13 is in a closed state and the quick grounding switch 12 is in an open state, the electromagnetic lock is in an electrically closed state. Through the linkage design, the box door 22 is not opened in a non-maintenance state and can be opened in a maintenance state, misoperation is avoided, and safety is further improved.
This linkage design specifically can realize through corresponding controlling means, with controlling means respectively with electromagnetic lock and T connect a section of thick bamboo electricity to be connected, controlling means controls the electromagnetic lock and gets electricity or loses the electricity based on the switching state signal of isolation switch 13 that obtains and the quick earthing switch 12 switching state signal that obtains again to the realization is to the coordinated control of electromagnetic lock.
While the GIS cable device provided in the present application has been described in detail, those skilled in the art will appreciate that the present disclosure is not limited thereto, and that the present disclosure may be modified in various embodiments and applications.
Claims (8)
1. A GIS cable device is characterized by comprising a T-shaped connecting cylinder and a test window;
the T-shaped connecting cylinder comprises a cylinder body, a quick grounding switch, an isolation switch and a grounding terminal;
the isolation switch is arranged in the cylinder body, the first end of the isolation switch is connected with the main transformer, and the second end of the isolation switch is connected with the outgoing cable;
the quick grounding switch is arranged in the cylinder body, and the first end of the quick grounding switch is connected with the first end of the isolation disconnecting link;
the grounding terminal is connected with the second end of the quick grounding switch;
the upper cover of the grounding terminal is provided with an insulating shielding ring;
the test window comprises a box body and a grounding row group;
the box body is arranged on the surface of the cylinder body and is provided with a box door which can be opened and closed;
the grounding terminal is arranged in the box body;
the grounding row group is detachably connected with the grounding terminal.
2. The GIS cable arrangement according to claim 1, wherein the dielectric strength of the material of the insulating shield ring is greater than or equal to 20 mm/kV.
3. The GIS cable assembly of claim 1 wherein the dielectric shield ring has a thickness of 4 mm.
4. The GIS cable assembly of claim 1 wherein the dielectric shield has a plurality of through holes circumferentially spaced about its central axis.
5. The GIS cable assembly of claim 1 wherein the ground bar set includes a transverse ground bar and a vertical ground bar;
the transverse grounding bar can be inserted into the box body in a drawing manner;
the grounding terminal is detachably connected with the transverse grounding bar;
the vertical grounding bar is arranged outside the box body, and one end of the vertical grounding bar is detachably connected with one end of the transverse grounding bar extending out of the box body.
6. The GIS cable assembly of claim 5 wherein the ground terminal is removably connected to the transverse ground bar by a screw; or
One end of the vertical grounding bar is detachably connected with one end of the transverse grounding bar extending out of the box body through a screw.
7. The GIS cable assembly of claim 1 wherein the door is openably and closably connected to the housing by an electromagnetic lock.
8. The GIS cable assembly of claim 7 wherein the open and closed states of the electromagnetic lock are in linkage with the open and closed states of the isolation switch and the open and closed states of the fast grounding switch;
when the isolation disconnecting link is in an open state and the quick grounding switch is in a closed state, the electromagnetic lock is in a power-off open state;
when the isolation disconnecting link is in a closed state and the quick grounding switch is in an open state, the electromagnetic lock is in an electric closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111417290.6A CN114217183B (en) | 2021-11-25 | 2021-11-25 | GIS cable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111417290.6A CN114217183B (en) | 2021-11-25 | 2021-11-25 | GIS cable device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114217183A true CN114217183A (en) | 2022-03-22 |
| CN114217183B CN114217183B (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111417290.6A Active CN114217183B (en) | 2021-11-25 | 2021-11-25 | GIS cable device |
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| Country | Link |
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| CN (1) | CN114217183B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208644A (en) * | 2019-05-15 | 2019-09-06 | 广州供电局有限公司 | GIS cable machinery |
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| CN112505516A (en) * | 2020-09-30 | 2021-03-16 | 江苏省如高高压电器有限公司 | Insulation part electric appliance performance test system for high-voltage electric appliance |
| CN112731210A (en) * | 2020-12-09 | 2021-04-30 | 江苏核电有限公司 | Main transformer electrical preventive test method without dismantling high-voltage side GIS |
| WO2021176687A1 (en) * | 2020-03-06 | 2021-09-10 | 三菱電機株式会社 | Gas-insulated switchgear and cable withstand voltage testing method for gas-insulated switchgear |
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2021
- 2021-11-25 CN CN202111417290.6A patent/CN114217183B/en active Active
Patent Citations (9)
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|---|---|---|---|---|
| CN201178008Y (en) * | 2008-03-28 | 2009-01-07 | 宁波天互电器有限公司 | Anti-flashover through-wall sleeve |
| CN202712019U (en) * | 2012-05-16 | 2013-01-30 | 沈阳华德海泰电器有限公司 | Three-position switch with outer surface coated with insulating layer |
| CN203411531U (en) * | 2013-07-31 | 2014-01-29 | 浙江大学 | High-voltage pulsed electric field technology-based device for instantaneous sterilizing of rice wine before bottling |
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| CN211669312U (en) * | 2019-12-25 | 2020-10-13 | 正泰电气股份有限公司 | Three-station grounding device for cable voltage withstand test |
| WO2021176687A1 (en) * | 2020-03-06 | 2021-09-10 | 三菱電機株式会社 | Gas-insulated switchgear and cable withstand voltage testing method for gas-insulated switchgear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114217183B (en) | 2024-05-28 |
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