AU7234300A - A bi-polar integrated concentric cable - Google Patents
A bi-polar integrated concentric cableInfo
- Publication number
- AU7234300A AU7234300A AU72343/00A AU7234300A AU7234300A AU 7234300 A AU7234300 A AU 7234300A AU 72343/00 A AU72343/00 A AU 72343/00A AU 7234300 A AU7234300 A AU 7234300A AU 7234300 A AU7234300 A AU 7234300A
- Authority
- AU
- Australia
- Prior art keywords
- insulation
- concentric cable
- conductor
- cable
- polar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/04—Concentric cables
Landscapes
- Insulated Conductors (AREA)
Description
P/00/0 1 1 Regulation 3.2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT Invention Title: A bi-polar integrated concentric cable The following statement is a full description of this invention, including the best method of performing it known to us: FH I'S DCFN ATPM12I21 WW 7 5 519.1 CA00369911.0 1 A bi-polar integrated concentric cable Field of the invention The present invention is related to a bipolar integrated concentric cable.
Background of the invention HVDC cables have been in two configurations; either in mono-polar or in bi-polar circuits. The mono-polar circuit consists of one high voltage cable and earth, sea or metallic return conductor is employed to complete the circuit. The bipolar circuit consists of two high voltage cables usually with equal rating, but with opposite polarity. Another limitation of prior art cables is the fact that to reduce the magnetic fields around the cables to a minimum the two cables must be laid very near each other or must be touching each other. This also increases the complexity of laying the cables.
A cable of the described type is disclosed in EP 0 938 102, comprising a central conductor having a negative polarity, a first insulation layer, a second conductor, a second installation layer and an outer sheath.
15 The applicant does not concede that the prior art discussed in the specification forms part of the common general knowledge in the art at the priority date of this application.
Summary of the Invention The bipolar integrated concentric cable according to the present invention, can be used "0 for bipolar as well as monopolar transmissions and reduces the disadvantages of prior art cables, 20 such as environmental problems.
:.•.*According to an aspect of the present invention there is provided a bipolar integrated i concentric cable, comprising a central conductor connected to the negative polarity, concentric layers of insulation and a second conductor connected to positive polarity, wherein the inner insulation and the outer insulation are made of the same material, the thickness of the outer insulation increasing twice as much as the thickness of the inner insulation by increased voltage.
CA00369911.0 2 Brief description of the drawings The invention and its advantages will become more apparent from the following description of an embodiment of the invention, by way of example only, with reference to the accompanying drawing.
Figure I discloses a cross section of the cable according to the present invention.
Detailed description of the embodiments A center conductor 1 is surrounded concentrically by a number of layers, the major of which is an insulation 2, surrounded by a second conductor 3. A second insulation 4 is surrounding a second conductor 3 and is surrounded by a lead sheath Inside the outer armour layer 7 is a plastic sheath 6, comprising reinforcement.
According to the invention, the first and second insulations 2 and 4 are made of the same materials, such as thin PP-film. Up to 50 kV to earth the thickness of both insulations may be S the same, however from 50 to 100 kV the thickness of the insulation 4 increases twice as fast as for the insulation 2, e.g. at 100 kV and higher to earth, insulation 4 is twice as thick as 15 insulation 2. The losses through insulation 2 are approximately twice the losses through i" insulation 4, which influences the thickness of insulation 2.
For the cable according to a preferred embodiment of the invention negative polarity is connected to the central conductor 1 and the positive polarity is connected to the second conductor 3. The cable according to a preferred embodiment of the present invention 20 furthermore has both conductors inside the metallic sheath, both of which are at high voltage °°*oo Sand insulated from the ground.
The voltage between the center conductor and the outer conductor is twice the sum of the nominal voltages to ground. The thickness of the first insulation 2 may be up to twice the thickness of the insulation 4 between the second conductor 3 and the outer metallic sheath.
Because of the fast increase in the cable size the present invention is mainly aimed for low to medium transmission capacities, such as up to 350 to 400 MW and voltages up to approximately 200 kV.
CA00369911.0 3 The present invention results in a cable with rotational symmetric cross-section that allows both phases to be laid and eventually buried in one campaign with conventional technology. It also allows the present invention to be laid to large depths.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99403317A EP1113461A1 (en) | 1999-12-30 | 1999-12-30 | A bi-polar integrated concentric cable |
| EP99403317 | 1999-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU7234300A true AU7234300A (en) | 2001-07-05 |
Family
ID=8242240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU72343/00A Abandoned AU7234300A (en) | 1999-12-30 | 2000-12-15 | A bi-polar integrated concentric cable |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1113461A1 (en) |
| JP (1) | JP2001189113A (en) |
| AU (1) | AU7234300A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6014910B2 (en) * | 2011-01-21 | 2016-10-26 | 矢崎総業株式会社 | High voltage conductive path and wire harness |
| JP5978509B2 (en) * | 2011-07-25 | 2016-08-24 | 矢崎総業株式会社 | High voltage conductive path and wire harness |
| JP5986812B2 (en) * | 2011-11-21 | 2016-09-06 | 矢崎総業株式会社 | Wire harness |
| JP5864228B2 (en) | 2011-11-21 | 2016-02-17 | 矢崎総業株式会社 | High voltage conductive path and wire harness |
| JP2014049364A (en) * | 2012-09-03 | 2014-03-17 | Yazaki Corp | Electric insulation structure and electric insulation method for coaxial core wire |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1011025B (en) * | 1956-09-14 | 1957-06-27 | Siemens Ag | DC high voltage cables |
| US3869621A (en) * | 1973-08-17 | 1975-03-04 | Massachusetts Inst Technology | Graded contained bulk transmission system |
-
1999
- 1999-12-30 EP EP99403317A patent/EP1113461A1/en not_active Withdrawn
-
2000
- 2000-12-08 JP JP2000374248A patent/JP2001189113A/en not_active Withdrawn
- 2000-12-15 AU AU72343/00A patent/AU7234300A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001189113A (en) | 2001-07-10 |
| EP1113461A1 (en) | 2001-07-04 |
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