CN112289545A - Dry capacitor core oil-filled high-voltage bushing - Google Patents
Dry capacitor core oil-filled high-voltage bushing Download PDFInfo
- Publication number
- CN112289545A CN112289545A CN202011083397.7A CN202011083397A CN112289545A CN 112289545 A CN112289545 A CN 112289545A CN 202011083397 A CN202011083397 A CN 202011083397A CN 112289545 A CN112289545 A CN 112289545A
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- dry
- capacitor core
- oil
- sleeve
- porcelain
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses an oil-filled high-voltage bushing of a dry capacitor core, which comprises the dry capacitor core; the mounting flange is arranged on the outer side of the dry-type capacitor core, the porcelain insulating outer sleeve is sleeved on the outer side of the dry-type capacitor core, a lower flange of the porcelain insulating outer sleeve is connected with the mounting flange through a bolt, the top oil conservator is arranged at the upper end of the porcelain insulating outer sleeve, and transformer oil is filled in a gap between the porcelain insulating outer sleeve and the dry-type capacitor core through an oil filling port of the top oil conservator; the air end wiring board is arranged at the upper end of the current-carrying conducting rod of the dry-type capacitor core through a bolt; the base is arranged at the bottom of the dry capacitor core, the pressure equalizing ball is arranged on the base through a bolt, and the wiring board in oil is in threaded connection with the lower end of the current-carrying conducting rod of the dry capacitor core; the invention avoids the defects of slippage, aluminum foil lap discharge, internal impurity discharge and the like when an oil-immersed paper capacitor core is adopted, and simultaneously, the running state of the sleeve can be monitored through the online chromatographic analysis of transformer oil due to the adoption of an oil-filled structure.
Description
Technical Field
The invention relates to a dry capacitor core oil-filled high-voltage bushing, belonging to the technical field of high-voltage bushings.
Background
The oil paper capacitor core of the oil paper capacitor bushing has the problems of sleeve explosion caused by slippage and internal discharge development, abnormal discharge caused by impurities in the oil paper capacitor core and the like, so that the oil chromatogram of the transformer is abnormal; the dry capacitor core replaces an oil-impregnated paper capacitor core, and the defects of capacitor core slippage, internal discharge development, internal impurities and the like of an oil-impregnated paper capacitor sleeve are overcome.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the dry capacitor core oil-filled high-voltage bushing, which avoids the defects of slippage, aluminum foil lap discharge, internal impurity discharge and the like when an oil-immersed paper capacitor core is adopted, and meanwhile, the running state of the bushing can be monitored through the online chromatographic analysis of transformer oil due to the adoption of an oil-filled structure; the transformer oil is used as an internal insulation filling material to form an oil flow channel, so that the dry capacitor core in the high-voltage bushing can dissipate heat through the oil flow of the transformer oil, the heat dissipation capacity of the dry capacitor core is effectively improved, and the current-carrying margin is improved.
The technical scheme adopted by the invention is as follows:
a dry capacitor core oil-filled high-voltage bushing comprises a dry capacitor core, a mounting flange, a porcelain insulating outer sleeve, a top oil conservator, an air end wiring board, a base, a pressure equalizing ball and an oil middle wiring board; the mounting flange is arranged on the outer side of the dry-type capacitor core, the porcelain insulating outer sleeve is sleeved on the outer side of the dry-type capacitor core, a lower flange of the porcelain insulating outer sleeve is connected with the mounting flange through a bolt, the top oil conservator is arranged at the upper end of the porcelain insulating outer sleeve, and transformer oil is filled into a gap between the porcelain insulating outer sleeve and the dry-type capacitor core through an oil filling port of the top oil conservator; the air end wiring board is arranged at the upper end of a current-carrying conducting rod of the dry-type capacitor core through a bolt; the base is arranged at the bottom of the dry capacitor core, the pressure equalizing ball is arranged on the base through a bolt, and the in-oil wiring board is in threaded connection with the lower end of the current-carrying conducting rod of the dry capacitor core.
As a further preferred aspect of the present invention, an aluminum alloy end cover is bolted to the top conservator.
Preferably, the top conservator is provided with a rain cover, and the rain cover is fixed on the current-carrying conducting rod of the dry capacitor core through a locking nut.
As a further preferred aspect of the present invention, a grounding sleeve and a lower porcelain bushing are further disposed outside the dry capacitor core, the upper end of the grounding sleeve is connected to the mounting flange, the lower end of the grounding sleeve is connected to the upper end of the lower porcelain bushing, and the lower end of the lower porcelain bushing is connected to the base; the top oil conservator is internally provided with a compression spring group, the compression spring group is installed on a current-carrying conducting rod of the dry-type capacitor core, the top oil conservator, the porcelain insulating outer sleeve, the mounting flange, the grounding sleeve and the lower porcelain sleeve are connected with the dry-type capacitor core into a whole through the working pressure of the compression spring group, and transformer oil is filled in gaps among the porcelain insulating outer sleeve, the mounting flange, the grounding sleeve, the lower porcelain sleeve and the dry-type capacitor core through an oil filling port of the top oil conservator.
As a further preferred feature of the present invention, the mounting flange is made of an aluminum alloy.
The invention has the beneficial effects that: the defects of slippage, aluminum foil lap discharge, internal impurity discharge and the like when an oil-impregnated paper capacitor core is adopted are avoided, and meanwhile, the running state of the sleeve can be monitored through online chromatographic analysis of transformer oil due to the adoption of an oil-filled structure; the transformer oil is used as an internal insulation filling material to form an oil flow channel, so that the dry capacitor core in the high-voltage bushing can dissipate heat through the oil flow of the transformer oil, the heat dissipation capacity of the dry capacitor core is effectively improved, and the current-carrying margin is improved.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram according to a second embodiment of the present invention;
the main reference numerals in the figures have the following meanings:
1-dry capacitor core, 2-mounting flange, 3-porcelain insulating outer sleeve, 4-top conservator, 5-air terminal board, 6-base, 7-pressure equalizing ball, 8-oil middle terminal board, 9-grounding sleeve, 10-lower porcelain sleeve, 11-current-carrying conducting rod, 12-transformer oil, 13-compression spring group, 14-aluminum alloy end cover and 15-rain-proof cover.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example one
As shown in fig. 1: the embodiment is a dry capacitor core oil-filled high-voltage bushing, which comprises a dry capacitor core 1, a mounting flange 2, a porcelain insulating outer sleeve 3, a top conservator 4, an air end wiring board 5, a base 6, a voltage-sharing ball 7 and an oil middle wiring board 8; the mounting flange 2 is mounted on the outer side of the dry-type capacitor core 1, the porcelain insulating outer sleeve 3 is sleeved on the outer side of the dry-type capacitor core 1, a lower flange of the porcelain insulating outer sleeve 3 is in bolt connection with the mounting flange 2, the top oil conservator 4 is mounted at the upper flange of the porcelain insulating outer sleeve 3 through a bolt, and transformer oil 12 is filled in a gap between the porcelain insulating outer sleeve 3 and the dry-type capacitor core 1 through an oil filling port of the top oil conservator 4; the air end wiring board 5 is arranged at the upper end of the current-carrying conducting rod 11 of the dry-type capacitor core 1 through a bolt; the base 6 is arranged at the bottom of the dry capacitor core 1, the pressure equalizing ball 7 is arranged on the base 6 through a bolt, and the wiring board 8 in oil is connected with the lower end of a current-carrying conducting rod 11 of the dry capacitor core 1 in a threaded manner; an aluminum alloy end cover 14 is mounted on the top oil conservator 4 through bolts; the mounting flange 2 in this embodiment is made of an aluminum alloy.
In the production of the embodiment, firstly, the current-carrying conducting rod 11 is rolled, vacuum-dried, vacuum-cast and cured, and then machined to form the dry capacitor core 1; placing an installation flange 2 made of aluminum alloy on a vertical assembly frame, enabling a dry-type capacitor core 1 to penetrate through the installation flange 2, and fixedly bonding the dry-type capacitor core 1 and the installation flange 2 by epoxy glue; then, a porcelain insulating sleeve 3 penetrates through the dry-type capacitor core 1, and a lower flange of the porcelain insulating sleeve 3 is fixed with the mounting flange 2 by bolts; the top oil conservator 4 is arranged at the upper end of the porcelain insulating outer sleeve 3, an upper flange is arranged at the upper end of the porcelain insulating outer sleeve 3, and the top oil conservator 4 and the upper flange of the porcelain insulating outer sleeve 3 are fixed through bolts; an aluminum alloy end cover 14 is arranged on the top conservator 4, and the aluminum alloy end cover 14 and the top conservator 4 are fixed through bolts; injecting the transformer oil 12 into the sleeve through an oil injection port of the top conservator 4 by using vacuum pressure oil immersion equipment; an air end wiring board 5 is arranged at the upper end of a current-carrying conducting rod 11 of the dry-type capacitor core 1 and is fastened and fixed through bolts; an oil wiring board 8 is installed at the lower end of the dry capacitor core 1, the oil wiring board 8 is screwed on the internal thread at the lower end of the current-carrying conducting rod 11 of the dry capacitor core 1 through threads, then a pressure-equalizing ball 7 is installed on the base 6, and the pressure-equalizing ball 7 is fixed on the base 6 through a jackscrew; the high-voltage bushing adopts a dry capacitor core and is filled with transformer oil, and is of a non-compression structure, and the bushing performs oil level compensation through a top oil conservator; by adopting the process of injecting the transformer oil in vacuum, the partial discharge starting voltage of the transformer oil in the sleeve can be improved, and the overall partial discharge level of the sleeve is improved.
Example two
As shown in fig. 2: the embodiment is a dry capacitor core oil-filled high-voltage bushing, which comprises a dry capacitor core 1, a mounting flange 2, a porcelain insulating outer sleeve 3, a top conservator 4, an air end wiring board 5, a base 6, a voltage-sharing ball 7 and an oil middle wiring board 8; the mounting flange 2 is mounted on the outer side of the dry-type capacitor core 1, the porcelain insulating outer sleeve 3 is sleeved on the outer side of the dry-type capacitor core 1, a lower flange of the porcelain insulating outer sleeve 3 is in bolt connection with the mounting flange 2, the top oil conservator 4 is mounted at the upper end of the porcelain insulating outer sleeve 3, the rain cover 15 is mounted on the top oil conservator 4, and the rain cover 15 is fixed on the current-carrying conducting rod 11 of the dry-type capacitor core 1 through a locking nut; the air end wiring board 5 is arranged at the upper end of the current-carrying conducting rod 11 of the dry-type capacitor core 1 through a bolt; the base 6 is arranged at the bottom of the dry capacitor core 1, the pressure equalizing ball 7 is arranged on the base 6 through a bolt, and the wiring board 8 in oil is connected with the lower end of a current-carrying conducting rod 11 of the dry capacitor core 1 in a threaded manner; the outer side of the dry-type capacitor core 1 is also provided with a grounding sleeve 9 and a lower porcelain bushing 10, the upper end of the grounding sleeve 9 is connected with the mounting flange 2, the lower end of the grounding sleeve 9 is connected with the upper end of the lower porcelain bushing 10, and the lower end of the lower porcelain bushing 10 is connected with the base 6; the top oil conservator is characterized in that a compression spring group 13 is arranged inside the top oil conservator 4, the compression spring group 13 is installed on a current-carrying conducting rod 11 of the dry-type capacitor core 1, the top oil conservator 4, the porcelain insulating outer sleeve 3, the mounting flange 2, the grounding sleeve 9 and the lower porcelain sleeve 10 are connected with the dry-type capacitor core 1 into a whole through the working pressure of the compression spring group 13, and transformer oil 12 is filled in a gap between the porcelain insulating outer sleeve 3, the mounting flange 2, the grounding sleeve 9, the lower porcelain sleeve 10 and the dry-type capacitor core 1 through an oil filling port of the top oil conservator 4.
In the production of the embodiment, firstly, the current-carrying conducting rod 11 is rolled, vacuum-dried, vacuum-cast and cured, and then machined to form the dry capacitor core 1; placing an installation flange 2 on a vertical assembly frame, enabling a dry type capacitor core 1 to penetrate through the installation flange 2, then assembling a grounding sleeve 9 and a lower porcelain bushing 10 from bottom to top through the dry type capacitor core 1 through a special assembly tool, and then screwing a base 6 on external threads at the bottom of the dry type capacitor core 1; then, a porcelain insulating outer sleeve 3 penetrates through the dry-type capacitor core 1 to be installed on the installation flange 2, a lower flange of the porcelain insulating outer sleeve 3 is connected with the installation flange 2 through a bolt, and then a top oil conservator 4 is placed at the upper end of the porcelain insulating outer sleeve 3; the upper end of the porcelain insulating outer sleeve 3 in the embodiment is not provided with an upper flange; then a compression spring group 13 is arranged in the oil conservator 4, and the top oil conservator 4, the porcelain insulating outer sleeve 3, the mounting flange 2, the grounding sleeve 9 and the lower porcelain bushing 10 are connected with the dry-type capacitor core 1 into a whole through the working pressure of the compression spring group 13; injecting the transformer oil 12 into the sleeve through an oil injection port of the top conservator 4 by using vacuum pressure oil immersion equipment; a rain cover 15 is arranged on the top oil conservator 4, and the rain cover 15 is fixed on the current-carrying conducting rod 11 of the dry-type capacitor core 1 through a locking nut; an air end wiring board 5 is arranged at the upper end of a current-carrying conducting rod 11 of the dry-type capacitor core 1 and is fastened and fixed through bolts; an oil wiring board 8 is installed at the lower end of the dry capacitor core 1, the oil wiring board 8 is screwed on the internal thread at the lower end of the current-carrying conducting rod 11 of the dry capacitor core 1 through threads, then a pressure-equalizing ball 7 is installed on the base 6, and the pressure-equalizing ball 7 is fixed on the base 6 through bolts; the embodiment is a high-voltage bushing which adopts a dry capacitor core and is filled with transformer oil, and the bushing is of a compression structure, and oil level compensation is carried out on the bushing through a top oil conservator; by adopting the process of injecting the transformer oil in vacuum, the partial discharge starting voltage of the transformer oil in the sleeve can be improved, and the overall partial discharge level of the sleeve is improved.
The invention avoids the defects of slippage, aluminum foil lap discharge, internal impurity discharge and the like when an oil-immersed paper capacitor core is adopted, and meanwhile, the running state of the sleeve can be monitored through the online chromatographic analysis of transformer oil due to the adoption of an oil-filled structure; the transformer oil is used as an internal insulation filling material to form an oil flow channel, so that the dry capacitor core in the high-voltage bushing can dissipate heat through the oil flow of the transformer oil, the heat dissipation capacity of the dry capacitor core is effectively improved, and the current-carrying margin is improved.
The above description is only a preferred embodiment of the present patent, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the inventive concept, and these modifications and decorations should also be regarded as the protection scope of the present patent.
Claims (5)
1. A dry capacitor core oil-filled high-voltage bushing is characterized in that: the dry-type capacitor comprises a dry-type capacitor core, a mounting flange, a porcelain insulating outer sleeve, a top oil conservator, an air end wiring board, a base, a pressure equalizing ball and an oil middle wiring board; the mounting flange is arranged on the outer side of the dry-type capacitor core, the porcelain insulating outer sleeve is sleeved on the outer side of the dry-type capacitor core, a lower flange of the porcelain insulating outer sleeve is connected with the mounting flange through a bolt, the top oil conservator is arranged at the upper end of the porcelain insulating outer sleeve, and transformer oil is filled into a gap between the porcelain insulating outer sleeve and the dry-type capacitor core through an oil filling port of the top oil conservator; the air end wiring board is arranged at the upper end of a current-carrying conducting rod of the dry-type capacitor core through a bolt; the base is arranged at the bottom of the dry capacitor core, the pressure equalizing ball is arranged on the base through a bolt, and the in-oil wiring board is in threaded connection with the lower end of the current-carrying conducting rod of the dry capacitor core.
2. The oil-filled high voltage bushing as claimed in claim 1, wherein the top conservator has an aluminum alloy end cap bolted thereto.
3. The oil-filled high voltage bushing of the dry capacitor core as claimed in claim 1, wherein a rain cover is installed on the top conservator, and the rain cover is fixed on the current-carrying conducting rod of the dry capacitor core through a locking nut.
4. The oil-filled high voltage bushing of the dry capacitor core as claimed in claim 1, wherein a grounding sleeve and a lower porcelain bushing are further disposed outside the dry capacitor core, the upper end of the grounding sleeve is connected to the mounting flange, the lower end of the grounding sleeve is connected to the upper end of the lower porcelain bushing, and the lower end of the lower porcelain bushing is connected to the base; the top oil conservator is internally provided with a compression spring group, the compression spring group is installed on a current-carrying conducting rod of the dry-type capacitor core, the top oil conservator, the porcelain insulating outer sleeve, the mounting flange, the grounding sleeve and the lower porcelain sleeve are connected with the dry-type capacitor core into a whole through the working pressure of the compression spring group, and transformer oil is filled in gaps among the porcelain insulating outer sleeve, the mounting flange, the grounding sleeve, the lower porcelain sleeve and the dry-type capacitor core through an oil filling port of the top oil conservator.
5. The oil-filled high voltage bushing as recited in claim 1, wherein said mounting flange is made of an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083397.7A CN112289545A (en) | 2020-10-12 | 2020-10-12 | Dry capacitor core oil-filled high-voltage bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083397.7A CN112289545A (en) | 2020-10-12 | 2020-10-12 | Dry capacitor core oil-filled high-voltage bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112289545A true CN112289545A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011083397.7A Pending CN112289545A (en) | 2020-10-12 | 2020-10-12 | Dry capacitor core oil-filled high-voltage bushing |
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| CN (1) | CN112289545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267571A (en) * | 2021-04-28 | 2021-08-17 | 华北电力科学研究院有限责任公司 | Test block for ultrasonic detection of porcelain piece under sleeve and detection method |
| CN113948300A (en) * | 2021-09-09 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method for connecting dry-type high-voltage bushing capacitor core and flange |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030014861A1 (en) * | 2001-02-02 | 2003-01-23 | Krol Robert A. | Method of making an apparatus bushing with silicone-rubber housing |
| CN202940110U (en) * | 2012-10-29 | 2013-05-15 | 姚文秋 | Multi-terminal coil out casing pipe of magnetic reactor |
| CN207834978U (en) * | 2017-12-27 | 2018-09-07 | 南京电气高压套管有限公司 | A kind of dry-type capacitance type list flange GIS outlet casing tubes through walls |
-
2020
- 2020-10-12 CN CN202011083397.7A patent/CN112289545A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030014861A1 (en) * | 2001-02-02 | 2003-01-23 | Krol Robert A. | Method of making an apparatus bushing with silicone-rubber housing |
| CN202940110U (en) * | 2012-10-29 | 2013-05-15 | 姚文秋 | Multi-terminal coil out casing pipe of magnetic reactor |
| CN207834978U (en) * | 2017-12-27 | 2018-09-07 | 南京电气高压套管有限公司 | A kind of dry-type capacitance type list flange GIS outlet casing tubes through walls |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267571A (en) * | 2021-04-28 | 2021-08-17 | 华北电力科学研究院有限责任公司 | Test block for ultrasonic detection of porcelain piece under sleeve and detection method |
| CN113267571B (en) * | 2021-04-28 | 2022-11-11 | 华北电力科学研究院有限责任公司 | Test block for ultrasonic detection of porcelain piece under casing and detection method |
| CN113948300A (en) * | 2021-09-09 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method for connecting dry-type high-voltage bushing capacitor core and flange |
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Application publication date: 20210129 |