CN109406970B - Three-phase integrated withstand voltage test device for GIS - Google Patents
Three-phase integrated withstand voltage test device for GIS Download PDFInfo
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- CN109406970B CN109406970B CN201811503373.5A CN201811503373A CN109406970B CN 109406970 B CN109406970 B CN 109406970B CN 201811503373 A CN201811503373 A CN 201811503373A CN 109406970 B CN109406970 B CN 109406970B
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- 239000004020 conductor Substances 0.000 claims abstract description 111
- 239000012212 insulator Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
- Insulating Bodies (AREA)
Abstract
The invention relates to the technical field of GIS tests, in particular to a three-phase integrated withstand voltage test device for a GIS. The device comprises a shell and an insulating sleeve, wherein a pressurizing conductor is arranged in the insulating sleeve; at least four interfaces are arranged on the shell, one of the interfaces is connected with the bottom end of the insulating sleeve, and the top end of the insulating sleeve is provided with a grading ring; the three interfaces are respectively provided with a basin-type insulator for being connected with the three-phase GIS cylinder, and the contact fingers on the basin-type insulator are used for being connected with the three-phase GIS conductors; three branch conductors are arranged in the shell, one ends of the three branch conductors are electrically connected with the pressurizing conductor in the insulating sleeve through connecting conductors, and the other ends of the three branch conductors are respectively connected with basin-type insulators at three interfaces. The invention designs the shell with the three-phase withstand voltage test interface, and is provided with the corresponding conductor to be connected with the inner conductor of the insulating sleeve, thereby realizing the three-phase live withstand voltage test of GIS equipment and improving the test efficiency.
Description
Technical Field
The invention relates to the technical field of GIS tests, in particular to a three-phase integrated withstand voltage test device for a GIS.
Background
Along with the commercial construction of the high-voltage power grid in China, the power transmission and transformation technology of the power system is continuously developed, the requirements on 220kV GIS equipment are increasingly improved in order to reduce the electric energy loss in the power transmission and transformation process and improve the voltage level of the power transmission and transformation line, and in order to ensure the reliability of the equipment in the operation process, the GIS equipment needs to be subjected to a pressurization test before leaving the factory and before the field equipment is assembled and operated, so that the problems in the actual operation process are solved. At present, 220kV GIS test equipment can only carry out a pressurization test on a single phase, and after one phase is finished, another phase is subjected to a pressurization test, so that the test time is greatly prolonged, and the labor cost is increased.
Disclosure of Invention
In order to solve the problems, the invention provides the three-phase integrated withstand voltage test device which can simultaneously carry out the pressurization test on the three-phase line of the GIS, effectively improves the test efficiency and saves the cost.
The scheme adopted by the invention is as follows: a three-phase integrated withstand voltage test device for GIS comprises a shell and an insulating sleeve, wherein a pressurizing conductor is arranged in the insulating sleeve; at least four interfaces are arranged on the shell, one of the interfaces is connected with the bottom end of the insulating sleeve, and the top end of the insulating sleeve is provided with a grading ring; the three interfaces are respectively provided with a basin-type insulator for being connected with the three-phase GIS cylinder, and the contact fingers on the basin-type insulator are used for being connected with the three-phase GIS conductors; three branch conductors are arranged in the shell, one ends of the three branch conductors are electrically connected with the pressurizing conductor in the insulating sleeve through connecting conductors, and the other ends of the three branch conductors are respectively connected with basin-type insulators at three interfaces. According to the invention, the three withstand voltage test interfaces are arranged on the shell through the shell with the special structure, so that the three-phase line of the GIS equipment can be connected at the same time, the conductor structure is correspondingly arranged in the shell, the withstand voltage test interfaces are electrically connected with the conductors in the insulating sleeve, the three-phase line is pressurized at the same time in one withstand voltage test, and the withstand voltage test efficiency is effectively improved.
The invention is also characterized in that one ends of the three branch conductors are detachably connected together, so that the connection and disconnection of the three branch conductors are conveniently realized. Preferably, one ends of the three branch conductors are connected together through three-phase communicating conductors, and the branch conductors are connected to the three-phase communicating conductors through bolts. In order to carry out the dismounting operation of the bolt, the shell is provided with an interface at the position corresponding to the three-phase communicating conductor, and an end cover is arranged on the interface and is used for carrying out the dismounting operation of the branch conductor and the three-phase communicating conductor and connecting the inflating and deflating equipment. The end cap is used for closing the interface when the interface is not used. When the branch conductors need to be disassembled, the end cover is disassembled. In addition, when the shell needs to be vacuumized or filled with insulating gas or recycled waste gas, the interface can be used for connecting corresponding air charging and discharging equipment for operation.
In order to realize connection or disconnection operation of the branch conductors and the basin-type insulator, interfaces are arranged at the joints of the corresponding three branch conductors and the basin-type insulator, and end covers are arranged on the interfaces and are used for carrying out disassembly and assembly operation of the branch conductors and the basin-type insulator and connecting air charging and discharging equipment.
The invention can realize the three-phase simultaneous electrification withstand voltage test of the GIS equipment, can also finish the two-phase or one-phase electrification withstand voltage test of the GIS equipment, and can be realized by disconnecting a corresponding number of branch conductors and basin-type insulators. However, since the end of the branch conductor is close to the basin insulator, only the disconnection is performed, and a discharge phenomenon is liable to occur. It is therefore considered to provide each branch conductor as a split assembly structure. And the connection between the pressurizing conductor and the GIS conductor is completely disconnected by disassembling the branch conductor while the connection with the basin-type insulator is disconnected.
Preferably, each branch conductor is assembled or inserted by bolts. The assembly mode is selected according to the convenience of operation.
In order to facilitate the disassembly and assembly of the branch conductors, the connection positions of the sections of the branch conductors are aligned to the connector with the end cover on the shell.
Preferably, the shell is cylindrical, and two ends of the cylindrical shell are used as two interfaces and as conductor dismounting operation ports; the upper side is provided with two interfaces side by side, which are respectively used for connecting the interfaces of the three-phase GIS equipment. The branch conductors are arranged in an inverted-mountain shape in the shell, the left branch conductor and the right branch conductor are L-shaped, the segment connection parts of the branch conductors are aligned with the left interface and the right interface, and the tail ends of the branch conductors are connected with the middle branch conductor at the left interface part on the upper side of the shell.
Furthermore, the interface department of casing all is equipped with flange, and flange outside is equipped with O type circle. The shell is required to ensure sufficient sealing, and a proper gas environment is provided for the pressure test.
The invention has the beneficial effects that:
1. the shell with the three-phase withstand voltage test interface is designed, and the shell is provided with a corresponding conductor to be connected with the inner conductor of the insulating sleeve, so that the three-phase live withstand voltage test of GIS equipment is realized, and the test efficiency is improved.
2. By arranging three branch conductors into a split assembly structure, a one-phase or two-phase test circuit can be effectively disconnected by disassembling the branch conductors, one-phase or two-phase live voltage withstand test of GIS equipment is realized, and the use mode is flexible.
3. Through offer the operation mouth on the casing, conveniently realize the dismouting of branch conductor, conveniently fill gassing operation simultaneously.
4. The basin-type insulator is arranged at the withstand voltage test interface, effective insulation in the electrified test process is achieved, meanwhile, interference of other factors in the surrounding environment is reduced through effective sealing of the interfaces, partial discharge is effectively avoided, and safe operation of GIS equipment is guaranteed.
Drawings
FIG. 1 is a perspective block diagram of a preferred embodiment of the present invention;
FIG. 2 is a perspective view of a preferred embodiment of the present invention in use;
in the figure, 1, grading rings, 2, a pressurizing conductor, 3, an insulating sleeve, 4, a first interface, 5, a connecting conductor, 6, a seventh interface, 7, an end cover, 8, a connecting flange, 9, a fourth interface, 10, a basin-type insulator, 11, a right side branch conductor, 12, a third interface, 13, a contact finger, 14, a middle branch conductor, 15, a left side branch conductor, 16, a second interface, 17, a sixth interface, 18, an O-shaped ring, 19, a shell, 20, a three-phase communication conductor, 21, a fifth interface, 22, a GIS barrel, 23 and a GIS conductor.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
A three-phase integrated test device for GIS is shown in figure 1, and comprises a cylindrical shell 19 and an insulating sleeve 3. The two ends of the shell 19 are open, as a sixth interface 17 and a seventh interface 6, the upper side of the shell 19 is sequentially provided with a fifth interface 21 and a first interface 4 from left to right, the lower side of the shell is sequentially provided with a second interface 16, a third interface 12 and a fourth interface 9 from left to right, each interface is provided with a connecting flange 8, and the outer end face of each connecting flange 8 is provided with an O-shaped ring 18. The flange of the first interface 4 is connected with the bottom end of the insulating sleeve 3 through bolts, and the top end of the insulating sleeve 3 is provided with a grading ring 1. The second, third and fourth interfaces 16, 12 and 9 are provided with basin-type insulators 10, the basin-type insulators are sunken towards the inside of the shell, the bell mouths of the basin-type insulators face the outer side of the shell, and the outer edges of the basin-type insulators are connected with corresponding connecting flanges through bolts. The second, third and fourth interfaces are used for installing the three-phase GIS cylinder 22, and the contact finger 13 at the bottom of the basin-type insulator is used for connecting the three-phase GIS conductor 23. And the fifth, sixth and seventh interfaces 21, 17 and 6 are also provided with end covers 7, and the end covers 7 are connected with the connecting flanges 8 through bolts.
Three branch conductors 11, 14, 15 are provided in the housing 19, and a pressure conductor 2 is provided in the insulating bush 3. The three branch conductors are all of split assembly structures, the middle branch conductor 14 is longitudinally arranged in alignment with the fifth interface, and the split assembly structure consists of two sections of conductors in a splicing manner. The two side branch conductors 11, 15 are respectively connected into L shape by a section of transverse conductor and two sections of longitudinal conductors through bolts, and the connection parts of the two side branch conductors are aligned with the sixth and seventh interfaces, so that the disassembly and assembly operations are convenient. One end of each of the three branch conductors is connected to the three-phase communicating conductor 20 through bolts, so that the three branch conductors are electrically connected, and the connection points are aligned with the fifth interface 21. The three branch conductors are arranged in an inverted-mountain shape, the tail ends of the three branch conductors are respectively aligned with three interfaces (second, third and fourth interfaces) at the lower side of the shell, and the tail ends of the three branch conductors are respectively connected with the conductive seat of the basin-type insulator through the plugs. The right branch conductor 11 is provided with a connecting conductor 5 at a position corresponding to the first interface through bolts, and the connecting conductor 5 is spliced with the bottom end of the pressurizing conductor 2.
As shown in fig. 2, when the device is used for pressure-proof test, the three-phase GIS cylinder 22 is connected with the connecting flanges of the second, third and fourth interfaces through bolts, the three-phase GIS conductor 23 is contacted with the contact finger 13 of the basin-type insulator, and the other end of the insulating sleeve 3 is connected with the pressurizing device, so that the communication between the GIS three-phase circuit and the pressurizing device is completed. And when the pressure is applied, the GIS three-phase line can be simultaneously subjected to live test. When only one or two phases of the test are required to be electrified, the upper-section middle branch conductor can be pulled out of the lower-section middle branch conductor through the fifth interface, and then the connecting bolt of the lower-section middle branch conductor and the basin-type insulator is disassembled, so that the middle one-phase pressurizing circuit is disconnected. Or through the sixth and seventh interfaces, the sections of the left or right branch conductor are disassembled firstly by disassembling the bolts, and then the branch conductor and the basin-type insulator are disassembled, so that the left or right one-phase pressurizing circuit is disconnected. When the device needs to vacuumize or aerate or recycle waste gas, any one of the fifth, sixth and seventh interfaces can be selected to be connected with corresponding equipment for operation.
The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and those skilled in the art should make simple modifications or equivalent substitutions in light of the embodiment.
Claims (3)
1. A three-phase integrated withstand voltage test device for GIS comprises a shell (19) and an insulating sleeve (3), wherein a pressurizing conductor (2) is arranged in the insulating sleeve (3); the method is characterized in that: at least four interfaces are arranged on the shell (19), one of the interfaces is connected with the bottom end of the insulating sleeve, and the top end of the insulating sleeve is provided with an equalizing ring (1); the three interfaces are respectively provided with a basin-type insulator (10) for being connected with the three-phase GIS cylinder, and the contact fingers (13) on the basin-type insulator are used for being connected with the three-phase GIS conductors; three branch conductors (11, 12 and 15) are arranged in the shell, one ends of the three branch conductors are electrically connected with a pressurizing conductor (2) in the insulating sleeve through a connecting conductor (5), and the other ends of the three branch conductors are respectively connected with basin-type insulators (10) at three interfaces; the shell is provided with interfaces at the joints of the corresponding three branch conductors and the basin-type insulator, and an end cover (7) is arranged on the interfaces for implementing the disassembly and assembly operations of the branch conductors and the basin-type insulator and connecting the inflation and deflation equipment; each branch conductor is of a split assembly structure; each branch conductor is assembled or inserted by bolts; the connection positions of all the sections of the branch conductors are aligned with an interface with an end cover on the shell; the shell is cylindrical, and two ends of the cylindrical shell are used as two interfaces and serve as conductor dismounting operation ports; two interfaces are arranged on the upper side by side and are respectively used for connecting the interfaces of the three-phase GIS equipment; the branch conductors are arranged in an inverted-mountain shape in the shell, the left branch conductor and the right branch conductor are L-shaped, the segment connection parts of the branch conductors are aligned with the left interface and the right interface, and the tail ends of the branch conductors are connected with the middle branch conductor at the left interface on the upper side of the shell; one ends of the three branch conductors (11, 12 and 15) are connected together through a three-phase communicating conductor (20), and the branch conductors are connected to the three-phase communicating conductor through bolts.
2. The three-phase integrated withstand voltage test device for a GIS according to claim 1, wherein: the shell is provided with an interface at the position corresponding to the three-phase communication conductor, and an end cover (7) is arranged on the interface and used for carrying out the disassembly and assembly operations of the branch conductor and the three-phase communication conductor and connecting the inflation and deflation equipment.
3. The three-phase integrated withstand voltage test device for GIS according to any one of claims 1 to 2, wherein: the connector of the shell is provided with a connecting flange (8), and the outer side of the connecting flange is provided with an O-shaped ring (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811503373.5A CN109406970B (en) | 2018-12-10 | 2018-12-10 | Three-phase integrated withstand voltage test device for GIS |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811503373.5A CN109406970B (en) | 2018-12-10 | 2018-12-10 | Three-phase integrated withstand voltage test device for GIS |
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| Publication Number | Publication Date |
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| CN109406970A CN109406970A (en) | 2019-03-01 |
| CN109406970B true CN109406970B (en) | 2024-03-08 |
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| CN201811503373.5A Active CN109406970B (en) | 2018-12-10 | 2018-12-10 | Three-phase integrated withstand voltage test device for GIS |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721049A (en) * | 2021-09-27 | 2021-11-30 | 许继（厦门）智能电力设备股份有限公司 | Auxiliary device for pressure test |
| CN115840111A (en) * | 2022-11-08 | 2023-03-24 | 上海西电高压开关有限公司 | GIS withstand voltage test frock |
| CN117833088B (en) * | 2024-03-05 | 2024-05-31 | 山东泰开电力开关有限公司 | Sensor mounting device and use method of gas-insulated totally-enclosed combined electrical apparatus |
| CN119270006B (en) * | 2024-12-05 | 2025-04-04 | 江苏恒高电气制造有限公司 | A phase-changing withstand voltage test device for three-phase common-compartment products |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122400A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage testing system for power cable |
| JP2010068664A (en) * | 2008-09-11 | 2010-03-25 | Kansai Electric Power Co Inc:The | Three-core integrated connection box, method of withstand voltage test on test subject cable, and method of assembling three-core integrated connection box |
| CN103376436A (en) * | 2012-04-12 | 2013-10-30 | 上海吴淞电气实业有限公司 | Test tool and method for three-phase box-shared voltage transformer |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN205829019U (en) * | 2016-06-28 | 2016-12-21 | 湖南长高电气有限公司 | The Insulation Test frock of Cubicle Gas-Insulated Switchgear cable outlet |
| CN106785943A (en) * | 2016-11-29 | 2017-05-31 | 河南平芝高压开关有限公司 | A kind of experiment of high-voltage switch gear is connected bus device with three |
| CN107831424A (en) * | 2017-11-27 | 2018-03-23 | 许继（厦门）智能电力设备股份有限公司 | One kind is used for GIS intervals pressure test test device |
| CN207281122U (en) * | 2017-11-01 | 2018-04-27 | 国网河南省电力公司新郑市供电公司 | GIS cable Integral three-phase ac voltage withstanding test lead devices |
| CN108020758A (en) * | 2016-10-28 | 2018-05-11 | 上海思源高压开关有限公司 | A kind of three-phase turns single-phase experimental rig |
| CN108680840A (en) * | 2018-05-31 | 2018-10-19 | 国网上海市电力公司 | A kind of insulation test device for 110kV three-phase non-segregated bus |
| CN209640447U (en) * | 2018-12-10 | 2019-11-15 | 山东电工电气日立高压开关有限公司 | A three-phase integrated withstand voltage test device for GIS |
-
2018
- 2018-12-10 CN CN201811503373.5A patent/CN109406970B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122400A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage testing system for power cable |
| JP2010068664A (en) * | 2008-09-11 | 2010-03-25 | Kansai Electric Power Co Inc:The | Three-core integrated connection box, method of withstand voltage test on test subject cable, and method of assembling three-core integrated connection box |
| CN103376436A (en) * | 2012-04-12 | 2013-10-30 | 上海吴淞电气实业有限公司 | Test tool and method for three-phase box-shared voltage transformer |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN205829019U (en) * | 2016-06-28 | 2016-12-21 | 湖南长高电气有限公司 | The Insulation Test frock of Cubicle Gas-Insulated Switchgear cable outlet |
| CN108020758A (en) * | 2016-10-28 | 2018-05-11 | 上海思源高压开关有限公司 | A kind of three-phase turns single-phase experimental rig |
| CN106785943A (en) * | 2016-11-29 | 2017-05-31 | 河南平芝高压开关有限公司 | A kind of experiment of high-voltage switch gear is connected bus device with three |
| CN207281122U (en) * | 2017-11-01 | 2018-04-27 | 国网河南省电力公司新郑市供电公司 | GIS cable Integral three-phase ac voltage withstanding test lead devices |
| CN107831424A (en) * | 2017-11-27 | 2018-03-23 | 许继（厦门）智能电力设备股份有限公司 | One kind is used for GIS intervals pressure test test device |
| CN108680840A (en) * | 2018-05-31 | 2018-10-19 | 国网上海市电力公司 | A kind of insulation test device for 110kV three-phase non-segregated bus |
| CN209640447U (en) * | 2018-12-10 | 2019-11-15 | 山东电工电气日立高压开关有限公司 | A three-phase integrated withstand voltage test device for GIS |
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