CN102386603B - High-voltage direct-current cable terminal using shielding cylinder - Google Patents
High-voltage direct-current cable terminal using shielding cylinder Download PDFInfo
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- CN102386603B CN102386603B CN201110324547.3A CN201110324547A CN102386603B CN 102386603 B CN102386603 B CN 102386603B CN 201110324547 A CN201110324547 A CN 201110324547A CN 102386603 B CN102386603 B CN 102386603B
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Abstract
The invention relates to a high-voltage direct-current cable terminal comprising a shielding cylinder. The high-voltage direct-current cable terminal comprises: a top electrode, an upper flange, an epoxy composite sleeve, an insulating oil, a stress cone, a lower flange, a sealed ring and a tail tube. The high-voltage direct-current cable terminal is characterized in that: the terminal also comprises: an epoxy piece, a shielding ring and the shielding cylinder; the top electrode is arranged on an upper part of the upper flange; the epoxy piece is connected with the upper flange; the shielding ring is embedded in the epoxy piece; the epoxy piece is connected with the epoxy composite sleeve; the shielding ring is connected with shielding cylinder; the epoxy composite sleeve is filled with the insulating oil; the shielding cylinder is infiltrated in the insulating oil so as to connect with the lower flange; the lower flange and the cable are sealed by the sealed ring; the lower flange is connected with the tail tube and is well grounded. In the direct-current cable terminal of the invention, because of using the metal shielding cylinder, the shielding is formed between the internal and external electric fields, which reaches a purpose of uniform composite sleeve shed or porcelain sleeve shed surface field intensity. And a purpose of increasing a flashover voltage can be achieved too.
Description
Technical field
The present invention relates to a kind of high voltage direct current cable terminal, particularly a kind of high voltage direct current cable terminal that adopts shielding cylinder.
Background technology
At present a lot of documents are all pointed out, than exchanging sleeve pipe, can under lower voltage, there is wet sudden strain of a muscle in DC bushing, reason be continue to use exchange sleeve design DC bushing under the effect of DC electric field, thereby under wet condition, bear larger voltage and more easily form flashover in ，Gan district, the dry district of filthy more easily formation.For the cable termination that has same form insulation principle with sleeve pipe, at present all for ac cable design, and if direct current cables terminal is continued to use the design of ac cable terminal, also easily there is wet sudden strain of a muscle.Its reason is that under AC field, the filth of cable termination is lighter, and under DC electric field, because electric field force is constant, airborne granule dust is along direction of an electric field displacement, thereby more easily cause filthy deposition, so the filth of direct current cables terminal is more serious than ac cable terminal.If continue to use the design of ac cable terminal, there is larger normal direction field intensity along face near insulator stress cone or compound sleeve, high field intensity can cause this part electric field of direct current cables terminal seriously to distort, and this portion temperature is raise, thereby more easily under wet condition, form dry district, than ac cable terminal, more easily cause flashover.
The patent documentation that relates at present cable termination has a lot, and the patent of invention of the cable termination of a kind of high-voltage air-gap screened processing that for example application number is 200610124044.0 relates to a kind of cable termination of high-voltage air-gap screened processing.Include external insulation by the injection molding full skirt of silicon rubber, outlet rod, semiconductive shielding layer, high-tension shielding cover, high-tension shielding end, embedded metal cover, epoxy bushing, insert gold utensil, full skirt is cast on outlet rod and epoxy bushing, in epoxy bushing, be inlaid with high-tension shielding end, high-tension shielding end is connected with embedded metal cover, embedded metal cover has high-tension shielding cover with the junction, bottom of outlet rod, between outlet rod and full skirt, there is one deck semiconductive shielding layer, semiconductive shielding layer extends in high-tension shielding end, in embedded metal cover, there is insertion gold utensil, inserting gold utensil connects by spring bolt with embedded metal cover.Partial discharge and electricity that this patent application mainly solves terminal are aging, and traditional insert structure is in stroke loose problem of bearing cable deadweight bolt in long-time running on tower bar.
Yet existing patent can not solve the impact of internal electric field on external electric field, make compound sleeve or insulator along the more uniform problem of face field strength distribution.
In view of this, be necessary to provide a kind of and can shield the impact of internal electric field on external electric field, make compound sleeve or insulator along the more uniform a kind of high voltage direct current cable terminal that adopts shielding cylinder of face field strength distribution.
Summary of the invention
The object of the invention is: the structure of improving current ac cable terminal, in insulating oil in terminal, place a metallic shield cylinder, and corresponding shading ring and epoxy part are provided, and shield the impact of its internal electric field on external electric field, make compound sleeve or insulator more even along face field strength distribution.
Technical scheme of the present invention is: a kind of high voltage direct current cable terminal that contains shielding cylinder, comprise top electrode, upper flange, epoxy composite cover, insulating oil, stress cone, lower flange, sealing ring and tail pipe, it is characterized in that: described terminal also comprises epoxy part, shading ring and shielding cylinder; Top electrode is on upper flange top, epoxy part is connected with upper flange, shading ring is embedded in epoxy part, epoxy part is connected with epoxy composite cover, shading ring is connected with shielding cylinder, in epoxy composite cover, fills insulating oil, and shielding cylinder infiltrates in insulating oil and is connected with lower flange, between lower flange and cable, by sealing ring, sealed, lower flange is connected with tail pipe and good earth.
The high voltage direct current cable terminal that contains shielding cylinder as above, is characterized in that, described shielding cylinder is cylindrical shape, and shading ring is circular ring metal material, embeds in epoxy part.
The invention has the beneficial effects as follows: owing to having used metallic shield cylinder, make to have formed shielding between inner electric field and outer electric field, reached even compound sleeve cluster parachute or insulator cluster parachute along face field intensity, improve the object of flashover voltage.
Accompanying drawing explanation
Fig. 1 is the cutaway view (only having cutd open right half part) of the high voltage direct current cable terminal of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, but this embodiment should not be construed as limitation of the present invention.
Reference numeral explanation: 1 top electrode, 2 upper flanges, 3 epoxy parts, 4 shading rings, 5 shielding cylinders, 6 epoxy composite covers (or insulator), 7 insulating oils, 8 stress cones, 9 lower flanges, 10 sealing rings, 11 tail pipes.
A kind of high voltage direct current cable terminal that contains shielding cylinder that the embodiment of the present invention provides, comprises top electrode 1, upper flange 2, epoxy part 3, shading ring 4, shielding cylinder 5, epoxy composite cover (or insulator) 6, insulating oil 7, stress cone 8, lower flange 9, sealing ring 10 and tail pipe 11.
Top electrode 1 is housed successively on the cable of high voltage direct current cable terminal, upper flange 2, epoxy part 3, stress cone 8, sealing ring 10, lower flange 9 and tail pipe 11, wherein: top electrode 1 is on upper flange 2 tops, upper flange 2 is connected with epoxy part 3, in epoxy part 3, be embedded with shading ring 4, epoxy part 3 is connected with epoxy composite cover (or insulator) 6, shading ring 4 is connected with shielding cylinder 5, in epoxy composite cover (or insulator) 6, fill insulating oil 7, shielding cylinder 5 infiltrates in insulating oil 7 and is connected with lower flange 9, between lower flange 9 and cable, there are sealing ring 10 sealings, lower flange 9 is connected with tail pipe 11.
The difference of the high voltage direct current cable terminal that contains shielding cylinder itself and traditional cable terminal maximum is, places the method shielding inner electric field and outer electric field of shielding cylinder, and have corresponding shading ring to be connected with shielding cylinder in its insulating oil in compound sleeve or insulator.
For direct current cables terminal inner electric field and outer electric field is shielded, the embodiment of the present invention is taked following scheme: in insulating oil 7, add shielding cylinder 5, shielding cylinder 5 bottoms are connected with lower flange 9, and top connects a shading ring 4, and shading ring 4 is embedded in epoxy part 3.Owing to having used shielding cylinder 5, make to have formed shielding between inner electric field and outer electric field, reached even compound sleeve (or insulator) 6 along face field intensity, improve the object of flashover voltage.Wherein, epoxy part 3, shading ring 4, shielding cylinder 5 are unexistent parts in conventional AC cable terminal structure, have embodied the principal character place of the present invention to the transformation of traditional cable terminal structure.
The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (2)
1. a high voltage direct current cable terminal that contains shielding cylinder, comprise top electrode (1), upper flange (2), epoxy composite cover (6), insulating oil (7), stress cone (8), lower flange (9), sealing ring (10) and tail pipe (11), it is characterized in that: described terminal also comprises epoxy part (3), shading ring (4) and shielding cylinder (5); Top electrode (1) is on upper flange (2) top, epoxy part (3) is connected with upper flange (2), shading ring (4) is embedded in epoxy part (3), epoxy part (3) is connected with epoxy composite cover (6), shading ring (4) is connected with shielding cylinder (5), in epoxy composite cover (6), fill insulating oil (7), shielding cylinder (5) infiltrates in insulating oil (7) and is connected with lower flange (9), between lower flange (9) and cable, by sealing ring (10) sealing, lower flange (9) is connected with tail pipe (11) and good earth.
2. the high voltage direct current cable terminal that contains shielding cylinder according to claim 1, is characterized in that, described shielding cylinder (5) is cylindrical shape, and shading ring (4) is circular ring metal material, embeds in epoxy part (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324547.3A CN102386603B (en) | 2011-10-21 | 2011-10-21 | High-voltage direct-current cable terminal using shielding cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324547.3A CN102386603B (en) | 2011-10-21 | 2011-10-21 | High-voltage direct-current cable terminal using shielding cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102386603A CN102386603A (en) | 2012-03-21 |
| CN102386603B true CN102386603B (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110324547.3A Active CN102386603B (en) | 2011-10-21 | 2011-10-21 | High-voltage direct-current cable terminal using shielding cylinder |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913618A (en) * | 2014-04-18 | 2014-07-09 | 山东彼岸电力科技有限公司 | Plus or minus 500 kv direct current all-fiber optical current transformer |
| CN105259440A (en) * | 2015-10-21 | 2016-01-20 | 中国电力科学研究院 | DC cable test terminal |
| CN106099826A (en) * | 2016-08-30 | 2016-11-09 | 南京南瑞集团公司 | Extruded type flexible direct current cable termination stress cone structure |
| CN106483413A (en) * | 2016-12-05 | 2017-03-08 | 浙江舟山海洋输电研究院有限公司 | High voltage direct current cable dry type easily-testing terminal |
| CN109217224A (en) * | 2018-11-13 | 2019-01-15 | 特变电工昭和（山东）电缆附件有限公司 | A kind of outer terminal of 500kV and 500kV or more AC and DC power cable user |
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| CN2582240Y (en) * | 2002-11-01 | 2003-10-22 | 许建国 | Dry, prefabricated and capacitance type cable terminal |
| CN1457541A (en) * | 2001-02-13 | 2003-11-19 | 住友电气工业株式会社 | Terminal structure of extreme-low temperature equipment |
| CN2593331Y (en) * | 2003-01-22 | 2003-12-17 | 山东彼岸电力科技有限公司 | High-voltage current mutual inductor |
| CN201017761Y (en) * | 2006-12-31 | 2008-02-06 | 西安西电高压开关有限责任公司 | 500kv SF6 insulation current mutual-inductor |
| CN201061115Y (en) * | 2007-06-21 | 2008-05-14 | 武汉华瑞电力科技股份有限公司 | 110kV-220kV crosslinked cable GIS terminal |
| JP4646241B2 (en) * | 2006-12-25 | 2011-03-09 | 株式会社ビスキャス | Power cable air termination connection |
| CN201821072U (en) * | 2010-10-09 | 2011-05-04 | 广东吉熙安电缆附件有限公司 | Socket sleeve for transformer |
| CN202384734U (en) * | 2011-10-21 | 2012-08-15 | 国网电力科学研究院 | High-voltage direct current cable terminal adopting shielding cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006025539A (en) * | 2004-07-08 | 2006-01-26 | Furukawa Electric Co Ltd:The | Air-tightness ensuring metal fitting and cable terminating connection using the metal fitting |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1457541A (en) * | 2001-02-13 | 2003-11-19 | 住友电气工业株式会社 | Terminal structure of extreme-low temperature equipment |
| CN2582240Y (en) * | 2002-11-01 | 2003-10-22 | 许建国 | Dry, prefabricated and capacitance type cable terminal |
| CN2593331Y (en) * | 2003-01-22 | 2003-12-17 | 山东彼岸电力科技有限公司 | High-voltage current mutual inductor |
| JP4646241B2 (en) * | 2006-12-25 | 2011-03-09 | 株式会社ビスキャス | Power cable air termination connection |
| CN201017761Y (en) * | 2006-12-31 | 2008-02-06 | 西安西电高压开关有限责任公司 | 500kv SF6 insulation current mutual-inductor |
| CN201061115Y (en) * | 2007-06-21 | 2008-05-14 | 武汉华瑞电力科技股份有限公司 | 110kV-220kV crosslinked cable GIS terminal |
| CN201821072U (en) * | 2010-10-09 | 2011-05-04 | 广东吉熙安电缆附件有限公司 | Socket sleeve for transformer |
| CN202384734U (en) * | 2011-10-21 | 2012-08-15 | 国网电力科学研究院 | High-voltage direct current cable terminal adopting shielding cylinder |
Non-Patent Citations (1)
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| CN102386603A (en) | 2012-03-21 |
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Inventor after: Chen Zhengzheng Inventor after: Liang Hanqing Inventor after: Zhao Jiankang Inventor after: Zhang Li Inventor after: Min Hong Inventor before: Chen Zhengzheng Inventor before: Zhao Jiankang Inventor before: Zhang Li Inventor before: Min Hong |
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Free format text: CORRECT: INVENTOR; FROM: CHEN ZHENGZHENG ZHAO JIANKANG ZHANG LI MIN HONG TO: CHEN ZHENGZHENG LIANG HANQING ZHAO JIANKANG ZHANG LI MIN HONG |
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