CN103474944B - Great creep distance direct current cable outdoor terminal - Google Patents
Great creep distance direct current cable outdoor terminal Download PDFInfo
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- CN103474944B CN103474944B CN201310362714.2A CN201310362714A CN103474944B CN 103474944 B CN103474944 B CN 103474944B CN 201310362714 A CN201310362714 A CN 201310362714A CN 103474944 B CN103474944 B CN 103474944B
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- direct current
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Abstract
The invention discloses a great creep distance direct current cable outdoor terminal. The great creep distance direct current cable outdoor terminal comprises a top cap, a hollow sleeve, a sealed fitting, a base and a tail pipe, wherein the hollow sleeve is vertically and upward arranged along a cable length direction, the top end of the hollow sleeve is connected with the top cap, the bottom end of the hollow sleeve is connected with the base, the hollow sleeve is connected with the top cap and the base to form a sealed cavity, the sealed cavity is filled with insulating oil, the top end of the cable extends out of the top cap after the cable penetrates through the base and the sealed cavity, the tail pipe is connected with the base, and the tail pipe is sleeved on the cable; the terminal further comprises a high voltage shield electrode and a grounded shield electrode which are arranged in the sealed cavity and immersed in the insulating oil, wherein the high voltage shield electrode is vertically and downward arranged and connected with the top cap, the grounded shield electrode is vertically and upward arranged and connected with the base. The terminal disclosed by the invention is capable of effectively improving pollution flashover voltage of the terminal and improving the operating reliability of the terminal.
Description
Technical field
The present invention relates to cable outdoor terminal, specifically refer to a kind of great creep distance direct current cable outdoor terminal, be applicable to the filthy serious direct current land cable in area or the outdoor terminal of extra large cable transmission line.
Background technology
China's offshore wind energy resource enriches, full-fledged along with offshore wind farm field technology, will inevitably become important sustainable energy in the future.Domestic Technology of HVDC based Voltage Source Converter is increasingly mature, and therefore flexible DC power transmission cable is also just widely used.Direct current terminal is at the end of transmission line, and it plays the effect of hermetically-sealed cable, improves the Electric Field Distribution of direct current cables end simultaneously, so as with other equipment connections of power transmission and transformation.
Be arranged on the direct current outdoor terminal of coastal area, the electrostatic under DC electric field very easily makes pot head outer surface attract dust, and coastal area has a humid climate, air humidity large, and comparing interchange sleeve pipe at lower voltages pollution flashover can occur.
Summary of the invention
The object of this invention is to provide a kind of great creep distance direct current cable outdoor terminal, this terminal effectively can improve the pollution flashover voltage of terminal, improves the reliability of terminal operating.
This purpose of the present invention realizes by the following technical solutions: a kind of great creep distance direct current cable outdoor terminal, comprise top cover, hollow bushing, sealing gold utensil, base and tail pipe, described base is positioned at the bottom of terminal, chassis ground, top cover is positioned at the top of terminal, described hollow bushing is arranged straight up along cable length direction, the top of hollow bushing is connected with top cover, the bottom of hollow bushing is connected with base, a sealed chamber is formed after described hollow bushing is connected with base with top cover, insulating oil is full of in sealing chamber, cable is through base, after sealed chamber, top is stretched out from top cover, cable is also set with DC stress cone in the part being positioned at sealed chamber, described sealing gold utensil is arranged between base and cable, enhanced leaktightness, described tail pipe is connected with base, tail pipe suit cable, it is characterized in that: described terminal also comprises high-tension shielding electrode and grounded shield electrode, described high-tension shielding electrode and grounded shield electrode are all built in described sealed chamber, and all immerse in insulating oil, wherein, described high-tension shielding electrode is arranged straight down, high-tension shielding electrode is connected with described top cover, described grounded shield electrode is arranged straight up, grounded shield electrode is connected with described base.
In the present invention, high-tension shielding electrode, plays the effect of shielding top air gap, makes air gap terminal electric field be zero, avoid bubble-discharge under DC electric field.Grounded shield electrode, plays the effect of raising Potential distribution, makes the external insulation equipotential line part of large distance outdoor terminal even, avoids causing partial discharge because internal field concentrates.
Described hollow bushing is silicon rubber composite hollow sleeve pipe.
The pipe range of described hollow bushing is 2000 ~ 3000mm.In the present invention, the insulation distance 300 ~ 1000mm larger than the sleeve pipe of equal electric pressure of large distance silicon rubber composite hollow sleeve pipe, concrete length is relevant with the pollution level of operating area.
Described high-tension shielding electrode is cylindrical shape, and high-tension shielding electrode is connected with top cover by fastening bolt.
Described grounded shield electrode is cylindrical shape, and grounded shield electrode is connected with base by fastening bolt.
Described terminal also comprises canopy, and described canopy is positioned at the top of this terminal, and covers described top cover, and the top of described cable is stretched out through after canopy.
The present invention be directed to filthy serious coastal design large distance direct current outdoor terminal, make the creepage distance of pot head enough large, effectively can improve the pollution flashover voltage of terminal, improve the reliability of terminal operating.Compared with prior art, the present invention has following remarkable result:
(1) pollution flashover voltage significantly improves, and can realize the application of filthy serious area;
(2) equipotential line on external insulation surface is evenly distributed, and is not easy to produce partial discharge;
(3) structure is simple, produces easily.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the overall structure figure of great creep distance direct current cable outdoor terminal of the present invention;
Fig. 2 is the cutaway view of great creep distance direct current cable outdoor terminal of the present invention.
Description of reference numerals
1, canopy; 2, top cover; 3, high-tension shielding electrode; 4, insulating oil; 5, hollow bushing;
6, DC stress cone; 7, grounded shield electrode; 8, gold utensil is sealed; 9, base;
10 tail pipes; 11, cable
Embodiment
As Fig. 1, a kind of great creep distance direct current cable outdoor terminal shown in Fig. 2, comprise top cover 2, hollow bushing 5, sealing gold utensil 8, base 9 and tail pipe 10, base 9 is positioned at the bottom of terminal, base 9 ground connection, top cover 2 is positioned at the top of terminal, hollow bushing 5 is arranged straight up along cable 11 length direction, hollow bushing 5 is silicon rubber composite hollow sleeve pipe, the pipe range of hollow bushing 5 is 2500mm, the top of hollow bushing 5 is connected with top cover 2, the bottom of hollow bushing 5 is connected with base 9, a sealed chamber is formed after hollow bushing 5 is connected with base 9 with top cover 2, insulating oil 4 is full of in sealing chamber, cable 11 is through base 9, after sealed chamber, top is stretched out from top cover 2, cable 11 is also set with DC stress cone 6 in the part being positioned at sealed chamber, sealing gold utensil 8 is arranged between base 9 and cable 11, enhanced leaktightness, tail pipe 10 is connected with base 9, tail pipe 10 is set with cable 11, this terminal also comprises high-tension shielding electrode 3 and grounded shield electrode 7, high-tension shielding electrode 3 and grounded shield electrode 7 are all built in sealed chamber, and all immerse in insulating oil 4, wherein, high-tension shielding electrode 3 is arranged straight down, high-tension shielding electrode 3 is connected with top cover 2, grounded shield electrode 7 is arranged straight up, grounded shield electrode 7 is connected with base 9.
In the present embodiment, high-tension shielding electrode 3 is cylindrical shape, and in order to realize the effect shielding top air gap, high-tension shielding electrode 3 is connected with top cover 2 by fastening bolt, nut, makes air gap terminal electric field be zero.Grounded shield electrode 7 is cylindrical shape, and grounded shield electrode 7 is connected with base 9 by fastening bolt, nut, plays and raises Potential distribution effect, avoids internal field to concentrate and the partial discharge caused.
For preventing the top cover that drenches with rain, this terminal also comprises canopy 1, and canopy 1 is positioned at the top of this terminal, and covers top cover 2, and the top of cable 11 is stretched out through after canopy 1.
As the conversion of the present embodiment, the pipe range of hollow bushing 5 can within the scope of 2000 ~ 3000mm value.
The present embodiment great creep distance direct current cable outdoor terminal and the maximum difference of other direct current outdoor terminals are, under identical electric pressure, the length of the composite hollow sleeve pipe of large distance direct current outdoor terminal, creepage distance are all far longer than other direct current outdoor terminals.Simultaneously, this terminal sets up high-tension shielding electrode and grounded shield electrode two bucking electrodes, make direct current terminal external insulation Potential distribution even, reach the object of the Potential distribution of the external insulation controlling direct current open air, simultaneously because high-tension shielding electrode handle top is air-gap screened, avoid the phenomenon generation that electric discharge occurs this portion gas.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited thereto; all this kind is according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.
Claims (6)
1. a great creep distance direct current cable outdoor terminal, comprise top cover (2), hollow bushing (5), sealing gold utensil (8), base (9) and tail pipe (10), described base (9) is positioned at the bottom of terminal, base (9) ground connection, top cover (2) is positioned at the top of terminal, described hollow bushing (5) is arranged straight up along cable (11) length direction, the top of hollow bushing (5) is connected with top cover (2), the bottom of hollow bushing (5) is connected with base (9), a sealed chamber is formed after described hollow bushing (5) is connected with base (9) with top cover (2), insulating oil (4) is full of in sealing chamber, cable (11) is through base (9), after sealed chamber, top is stretched out from top cover (2), cable (11) is also set with DC stress cone (6) in the part being positioned at sealed chamber, described sealing gold utensil (8) is arranged between base (9) and cable (11), enhanced leaktightness, described tail pipe (10) is connected with base (9), tail pipe (10) suit cable (11), it is characterized in that: described terminal also comprises high-tension shielding electrode (3) and grounded shield electrode (7), described high-tension shielding electrode (3) and grounded shield electrode (7) are all built in described sealed chamber, and all immerse in insulating oil (4), wherein, described high-tension shielding electrode (3) is arranged straight down, high-tension shielding electrode (3) is connected with described top cover (2), described grounded shield electrode (7) is arranged straight up, grounded shield electrode (7) is connected with described base (9).
2. great creep distance direct current cable outdoor terminal according to claim 1, is characterized in that: described hollow bushing (5) is silicon rubber composite hollow sleeve pipe.
3. great creep distance direct current cable outdoor terminal according to claim 2, is characterized in that: the pipe range of described hollow bushing (5) is 2000 ~ 3000mm.
4. great creep distance direct current cable outdoor terminal according to claim 1, is characterized in that: described high-tension shielding electrode (3) is cylindrical shape, and high-tension shielding electrode (3) is connected with top cover (2) by fastening bolt.
5. great creep distance direct current cable outdoor terminal according to claim 1, is characterized in that: described grounded shield electrode (7) is cylindrical shape, and grounded shield electrode (7) is connected with base (9) by fastening bolt.
6. the great creep distance direct current cable outdoor terminal according to any one of claim 1 to 5, it is characterized in that: described terminal also comprises canopy (1), described canopy (1) is positioned at the top of this terminal, and cover described top cover (2), the top of described cable (11) is stretched out through after canopy (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310362714.2A CN103474944B (en) | 2013-08-19 | 2013-08-19 | Great creep distance direct current cable outdoor terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310362714.2A CN103474944B (en) | 2013-08-19 | 2013-08-19 | Great creep distance direct current cable outdoor terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103474944A CN103474944A (en) | 2013-12-25 |
| CN103474944B true CN103474944B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310362714.2A Active CN103474944B (en) | 2013-08-19 | 2013-08-19 | Great creep distance direct current cable outdoor terminal |
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| CN (1) | CN103474944B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872636A (en) * | 2014-04-03 | 2014-06-18 | 上海三原电缆附件有限公司 | Insulation bunched joint and application thereof in high-voltage direct current terminal |
| CN104332258B (en) * | 2014-10-28 | 2016-08-24 | 国网山东省电力公司菏泽供电公司 | The high-voltage wall bushing improved |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845261Y (en) * | 2005-10-11 | 2006-12-06 | 上海三原电缆附件有限公司 | Outdoor terminal of 220 KV crosslinked cable |
| 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 |
| JP2009017623A (en) * | 2007-07-02 | 2009-01-22 | Kansai Electric Power Co Inc:The | 3-core collective connection box |
| CN203423467U (en) * | 2013-08-19 | 2014-02-05 | 广东电网公司电力科学研究院 | Large-creep distance direct-current cable outdoor terminal |
-
2013
- 2013-08-19 CN CN201310362714.2A patent/CN103474944B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845261Y (en) * | 2005-10-11 | 2006-12-06 | 上海三原电缆附件有限公司 | Outdoor terminal of 220 KV crosslinked cable |
| 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 |
| JP2009017623A (en) * | 2007-07-02 | 2009-01-22 | Kansai Electric Power Co Inc:The | 3-core collective connection box |
| CN203423467U (en) * | 2013-08-19 | 2014-02-05 | 广东电网公司电力科学研究院 | Large-creep distance direct-current cable outdoor terminal |
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| CN103474944A (en) | 2013-12-25 |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Patentee after: Shanghai Sanyuan Cable Accessories Co., Ltd. Address before: 510080 Dongfeng East Road, Guangdong, Guangzhou, water, Kong Kong, No. 8 Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation Patentee before: Shanghai Sanyuan Cable Accessories Co., Ltd. |