CN103474944A - Great creep distance direct current cable outdoor terminal - Google Patents
Great creep distance direct current cable outdoor terminal Download PDFInfo
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- CN103474944A CN103474944A CN2013103627142A CN201310362714A CN103474944A CN 103474944 A CN103474944 A CN 103474944A CN 2013103627142 A CN2013103627142 A CN 2013103627142A CN 201310362714 A CN201310362714 A CN 201310362714A CN 103474944 A CN103474944 A CN 103474944A
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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 large distance direct current cables outdoor terminal, be applicable to the direct current land cable in filthy serious area or the outdoor terminal of extra large cable transmission line.
Background technology
China's offshore wind energy resource is abundant, and full-fledged along with the 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, so the flexible DC power transmission cable also just is 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 static under DC electric field very easily makes pot head outer surface absorption dust, and coastal area has a humid climate, air humidity is large, and comparing the interchange sleeve pipe can under lower voltage, pollution flashover occur.
Summary of the invention
The purpose of this invention is to provide a kind of large distance direct current cables outdoor terminal, this terminal can effectively 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 large distance direct current cables outdoor terminal, comprise top cover, hollow bushing, the sealing gold utensil, base and tail pipe, described base is positioned at the bottom of terminal, base ground connection, top cover is positioned at the top of terminal, described hollow bushing arranges straight up along the cable length direction, the top of hollow bushing is connected with top cover, the bottom of hollow bushing is connected with base, the described hollow bushing sealed chamber of rear formation that is connected with base with top cover, be full of insulating oil in the sealing chamber, cable is through base, after sealed chamber, stretch out from top cover on top, cable also is set with the DC stress cone in the part that is 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 earth shield electrode, described high-tension shielding electrode and earth shield electrode all are built in described sealed chamber, and all immerse in insulating oil, wherein, described high-tension shielding electrode arranges straight down, the high-tension shielding electrode is connected with described top cover, described earth shield electrode arranges straight up, the earth shield electrode is connected with described base.
In the present invention, the high-tension shielding electrode, play the effect of shielding top air gap, and making air gap terminal electric field is zero, avoids bubble-discharge under DC electric field.The earth shield electrode, play the effect of raising Potential distribution, makes the external insulation equipotential line part of large distance outdoor terminal evenly, 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 of large distance silicon rubber composite hollow sleeve pipe is than the large 300～1000mm of the sleeve pipe of equal electric pressure, and concrete length is relevant with the pollution level of operating area.
Described high-tension shielding electrode is cylindrical shape, and the high-tension shielding electrode is connected with top cover by fastening bolt.
Described earth shield electrode is cylindrical shape, and the earth 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 stretch out through after canopy on the top of described cable.
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, can effectively improve the pollution flashover voltage of terminal, improve the reliability of terminal operating.With in prior art, compare, 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) simple in structure, produce easily.
The 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 large distance direct current cables outdoor terminal of the present invention;
Fig. 2 is the cutaway view of large distance direct current cables 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, earth shield electrode; 8, sealing gold utensil; 9, base;
10 tail pipes; 11, cable
Embodiment
As Fig. 1, a kind of large distance direct current cables 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 arranges straight up along cable 11 length directions, 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, hollow bushing 5 sealed chamber of rear formation that is connected with base 9 with top cover 2, be full of insulating oil 4 in the sealing chamber, cable 11 is through base 9, after sealed chamber, stretch out from top cover 2 on top, cable 11 also is set with DC stress cone 6 in the part that is 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 suit cables 11, this terminal also comprises high-tension shielding electrode 3 and earth shield electrode 7, high-tension shielding electrode 3 and earth shield electrode 7 all are built in sealed chamber, and all immerse in insulating oil 4, wherein, high-tension shielding electrode 3 arranges straight down, high-tension shielding electrode 3 is connected with top cover 2, earth shield electrode 7 arranges straight up, earth 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 shielding the effect of top air gap, high-tension shielding electrode 3 is connected with top cover 2 by fastening bolt, nut, and making air gap terminal electric field is zero.Earth shield electrode 7 is cylindrical shape, and earth shield electrode 7 is connected with base 9 by fastening bolt, nut, plays and raises the Potential distribution effect, avoids internal field to concentrate and the partial discharge of initiation.
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 stretch out through after canopy 1 on the top of cable 11.
As the conversion of the present embodiment, the pipe range of hollow bushing 5 can be in 2000～3000mm scope value.
The difference of the present embodiment large distance direct current cables outdoor terminal and other direct current outdoor terminal maximums is, under identical electric pressure, the length of the composite hollow sleeve pipe of large distance direct current outdoor terminal, creepage distance all are far longer than other direct current outdoor terminals.Simultaneously, this terminal is set up high-tension shielding electrode and two bucking electrodes of earth shield electrode, make direct current terminal external insulation Potential distribution even, reach the purpose of the Potential distribution of the interior external insulation of controlling the direct current open air, because high-tension shielding electrode handle top is air-gap screened, the phenomenon of having avoided this portion gas that electric discharge occurs occurs simultaneously.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited to this; all this kind is according to foregoing of the present invention; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite; the modification of other various ways that said structure of the present invention is made, replacement or change, within all should dropping on protection scope of the present invention.
Claims (6)
1. a large distance direct current cables 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) arranges 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), described hollow bushing (5) sealed chamber of rear formation that is connected with base (9) with top cover (2), be full of insulating oil (4) in the sealing chamber, cable (11) is through base (9), after sealed chamber, stretch out from top cover (2) on top, cable (11) also is set with DC stress cone (6) in the part that is 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 earth shield electrode (7), described high-tension shielding electrode (3) and earth shield electrode (7) all are built in described sealed chamber, and all immerse in insulating oil (4), wherein, described high-tension shielding electrode (3) arranges straight down, high-tension shielding electrode (3) is connected with described top cover (2), described earth shield electrode (7) arranges straight up, earth shield electrode (7) is connected with described base (9).
2. large distance direct current cables outdoor terminal according to claim 1, it is characterized in that: described hollow bushing (5) is silicon rubber composite hollow sleeve pipe.
3. large distance direct current cables outdoor terminal according to claim 2, it is characterized in that: the pipe range of described hollow bushing (5) is 2000～3000mm.
4. large distance direct current cables 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. large distance direct current cables outdoor terminal according to claim 1 is characterized in that: described earth shield electrode (7) is cylindrical shape, and earth shield electrode (7) is connected with base (9) by fastening bolt.
6. according to the described large distance direct current cables of claim 1 to 5 any one outdoor terminal, 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), stretch out through after canopy (1) on the top of described cable (11).
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 |
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| Publication Number | Publication Date |
|---|---|
| CN103474944A true CN103474944A (en) | 2013-12-25 |
| CN103474944B CN103474944B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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) |
Cited By (4)
| 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 |
| CN104332258A (en) * | 2014-10-28 | 2015-02-04 | 成都峰达科技有限公司 | Improved high voltage wall bushing |
| 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 |
| CN111435783A (en) * | 2019-01-11 | 2020-07-21 | 宝胜(上海)线缆科技有限公司 | Dry type flexible cable 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 |
Cited By (5)
| 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 |
| CN104332258A (en) * | 2014-10-28 | 2015-02-04 | 成都峰达科技有限公司 | Improved high voltage wall bushing |
| 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 |
| CN111435783A (en) * | 2019-01-11 | 2020-07-21 | 宝胜(上海)线缆科技有限公司 | Dry type flexible cable terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103474944B (en) | 2015-03-04 |
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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. |