CN102386603A - 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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- CN102386603A CN102386603A CN2011103245473A CN201110324547A CN102386603A CN 102386603 A CN102386603 A CN 102386603A CN 2011103245473 A CN2011103245473 A CN 2011103245473A CN 201110324547 A CN201110324547 A CN 201110324547A CN 102386603 A CN102386603 A CN 102386603A
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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 of adopting shielding cylinder.
Background technology
At present a lot of documents are all pointed out; The wet sudden strain of a muscle can take place than exchanging sleeve pipe in dc bushing under lower voltage; Reason be continue to use exchange sleeve design dc bushing under the effect of DC electric field; Filth forms more easily and does the district under the wet condition, thereby bear bigger voltage and forms flashover more easily in dried district.For the cable termination that same form insulation principle is arranged with sleeve pipe, all is at present to the ac cable design, and if the design at ac cable terminal is continued to use at the direct current cables terminal, the wet sudden strain of a muscle then also appears easily.Its reason is that the filth of cable termination is lighter under the AC field; And under DC electric field, because electric field force is constant, airborne granule dust moves along direction of an electric field is directed; Thereby cause filthy deposition more easily, so the filth at direct current cables terminal is more serious than ac cable terminal.If there are bigger normal direction field intensity in insulator or the compound cover continued to use near design then the stress cone at ac cable terminal along face; High field intensity can cause this part electric field of direct current cables terminal seriously to distort; And this portion temperature is raise; Thereby under wet condition, form more easily and do the district, cause flashover more easily than ac cable terminal.
The patent documentation that relates to cable termination at present has a lot, and for example application number is the patent of invention of the cable termination of a kind of high-voltage air-gap screened processing of 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 bar, semiconductive shielding layer, high-tension shielding cover, high-tension shielding end, embedded metal cover, epoxy bushing, insertion gold utensil; Full skirt is cast on outlet bar and the epoxy bushing; Be inlaid with the high-tension shielding end in the epoxy bushing, the high-tension shielding end is connected with the embedded metal cover, and the embedded metal cover has the high-tension shielding cover with the junction, bottom of outlet bar; One deck semiconductive shielding layer is arranged between outlet bar and full skirt; Semiconductive shielding layer extends in the high-tension shielding end, in the embedded metal cover insertion gold utensil is arranged, and inserts gold utensil and connects through spring bolt with the embedded metal cover.The partial discharge that this patent application mainly solves the terminal is aging with electricity, and traditional insert structure is in stroke loose problem of bearing cable deadweight bolt in long-time running on the tower bar.
Yet existing patent can not solve the external electric field effects of internal electric field, makes compound cover or insulator along the uniform more problem of face field strength distribution.
In view of this, be necessary to provide a kind of and can shield the external electric field effects of internal electric field, make compound cover or insulator along the uniform more a kind of high voltage direct current cable terminal of adopting shielding cylinder of face field strength distribution.
Summary of the invention
The objective of the invention is: the structure of improving present ac cable terminal; Place a metallic shield cylinder in the insulating oil in the terminal; And corresponding shading ring and epoxy spare are provided, and shield the external electric field effects of its internal electric field, make compound cover or insulator more even along the face field strength distribution.
Technical scheme of the present invention is: a kind of high voltage direct current cable terminal of containing 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: said terminal also comprises epoxy spare, shading ring and shielding cylinder; Top electrode is on upper flange top, and epoxy spare is connected with upper flange, and shading ring is embedded in the epoxy spare; Epoxy spare links to each other with the epoxy composite cover; Shading ring links to each other with shielding cylinder, fills insulating oil in the epoxy composite cover, and shielding cylinder infiltrates in the insulating oil and links to each other with lower flange; By the sealing ring sealing, lower flange links to each other with tail pipe and good earth between lower flange and the cable.
The aforesaid high voltage direct current cable terminal of containing shielding cylinder is characterized in that said shielding cylinder is a cylindrical shape, and shading ring is the circular ring metal material, embeds in the epoxy spare.
The invention has the beneficial effects as follows: owing to used the metallic shield cylinder, make to have formed shielding between the inner electric field and outer electric field, reached even compound cover cluster parachute or insulator cluster parachute, improve the purpose of flashover voltage along the face field intensity.
Description of drawings
Fig. 1 is the cutaway view (only having cutd open right half part) at the high voltage direct current cable terminal of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description, but this embodiment should not be construed as limitation of the present invention.
Reference numeral explanation: 1 top electrode, 2 upper flanges, 3 epoxy spares, 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 of containing shielding cylinder that the embodiment of the invention provides comprises top electrode 1, upper flange 2, epoxy spare 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, upper flange 2, epoxy spare 3, stress cone 8 are housed on the cable at high voltage direct current cable terminal successively, 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 spare 3; In epoxy spare 3, be embedded with shading ring 4, epoxy spare 3 links to each other with epoxy composite cover (or insulator) 6, and shading ring 4 links to each other with shielding cylinder 5; Fill insulating oil 7 in the epoxy composite cover (or insulator) 6; Shielding cylinder 5 infiltrates in the insulating oil 7 and links to each other with lower flange 9, and sealing ring 10 sealings are arranged between lower flange 9 and the cable, and lower flange 9 links to each other with tail pipe 11.
The maximum difference in high voltage direct current cable terminal itself and traditional cable terminal that contains shielding cylinder is, places the method shielding inner electric field and outer electric field of shielding cylinder in its insulating oil in compound cover or insulator, and has corresponding shading ring to be connected with shielding cylinder.
In order to make direct current cables terminal inner electric field and outer electric field obtain shielding, the embodiment of the 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 the epoxy spare 3.Owing to used shielding cylinder 5, make to have formed shielding between the inner electric field and outer electric field, reached even compound cover (or insulator) 6 along the face field intensity, improve the purpose of flashover voltage.Wherein, epoxy spare 3, shading ring 4, shielding cylinder 5 are unexistent parts in the conventional AC cable termination structure, have embodied the principal character place that the present invention transforms the traditional cable terminal structure.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (2)
1. high voltage direct current cable terminal of containing 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: said terminal also comprises epoxy spare (3), shading ring (4) and shielding cylinder (5); Top electrode (1) is on upper flange (2) top; Epoxy spare (3) is connected with upper flange (2); Shading ring (4) is embedded in the epoxy spare (3), and epoxy spare (3) links to each other with epoxy composite cover (6), and shading ring (4) links to each other with shielding cylinder (5); Fill insulating oil (7) in the epoxy composite cover (6); Shielding cylinder (5) infiltrates in the insulating oil (7) and links to each other with lower flange (9), and by sealing ring (10) sealing, lower flange (9) links to each other with tail pipe (11) and good earth between lower flange (9) and the cable.
2. the high voltage direct current cable terminal of containing shielding cylinder according to claim 1 is characterized in that said shielding cylinder (5) is a cylindrical shape, and shading ring (4) is the circular ring metal material, embeds in the epoxy spare (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 true CN102386603A (en) | 2012-03-21 |
| CN102386603B 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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Cited By (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 |
| 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 |
| 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 |
-
2011
- 2011-10-21 CN CN201110324547.3A patent/CN102386603B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102386603B (en) | 2014-02-05 |
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
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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