CN111181147A - One-way transmission line - Google Patents
One-way transmission line Download PDFInfo
- Publication number
- CN111181147A CN111181147A CN201811347126.0A CN201811347126A CN111181147A CN 111181147 A CN111181147 A CN 111181147A CN 201811347126 A CN201811347126 A CN 201811347126A CN 111181147 A CN111181147 A CN 111181147A
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- China
- Prior art keywords
- transmission line
- power transmission
- power
- line according
- electron gun
- 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.)
- Pending
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 97
- 239000011888 foil Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000005433 ionosphere Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/006—Constructional features relating to the conductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Cable Installation (AREA)
Abstract
In space cable systems, counterweights often require electrical power from a central station. If a two-loop transmission line is used for transmission, the line losses are too large and the mass of the transmission line of both loops is too large. The invention provides a single-loop power transmission line, which can save half of the power transmission line, reduce the weight of a system and realize the power transmission function.
Description
Technical Field
The invention relates to the technical field of space, in particular to a power transmission line, which can complete a power transmission task only by one lead.
Background
The solar sailboards cannot bear centrifugal acceleration and can only be installed in a central station at the center of mass. Power is required at the counterweight and therefore power needs to be transmitted from the central station to the counterweight.
The current transmission lines are double-loop, the current of one loop flows to the electric equipment, and the current of the other loop returns from the electric equipment to form a complete loop. The ground high voltage line is a single circuit, but actually utilizes the earth as the other circuit. The ground high-voltage transmission can reach more than hundreds of thousands of volts.
In space, because the electric conductivity of the ionized layer environment is high, an electric breakdown event is easy to occur, and therefore the transmission voltage is difficult to exceed 2 ten thousand volts. The cable of the cable system with too much idle comprises a reducing rope, a main rope, a multi-strand rope and the like, and the aim is to reduce the weight, particularly the outer end. Every time the mass of the outer end is increased by 1kg, the overall mass needs to be increased by 2-10 kg. Current transmission lines have low current capacity, and 2.5mm ^2 conductors can only pass 20A of current, so that the transmission power is limited.
When the cable system is too idle, the counterweight may need to move inwards and outwards, and the electric energy can be ensured to be received when the counterweight needs to move inwards and outwards.
Disclosure of Invention
In order to solve the problems, the single-loop power transmission line is adopted in the technology to replace a double-loop power transmission line, one loop is saved, and the quality of a cable and the whole cable is reduced. Meanwhile, a winding drum and an electric brush can be adopted at the counterweight, and electric energy can still be obtained through the electric brush in the moving process of the counterweight.
A power transmission line is used for power transmission between a central station and a balance weight (2) of a cable-over-the-air system, the central station is connected with the balance weight through a multi-strand rope (3), the power transmission line (5) is a single loop, one end of the power transmission line is provided with an electron generating device, and the other end of the power transmission line is provided with an electron gun (8); the electron generating device generates electrons, the electrons are guided into the power transmission line and are injected into the space through the electron gun at the other end, and therefore current is formed.
As an improvement to the transmission line, the transmission line (5) is nested within the plurality of strands; the conductive material of the power transmission line is the innermost layer, the insulating layer is arranged outside the conductive material, and the multi-strand rope (3) layer is arranged outside the insulating layer.
As an improvement to the power transmission line, the conductive material is aluminum stranded wire.
As an improvement on the power transmission line, the outermost layer of the multi-strand rope (3) is a layer of metal foil, and the metal foil is used as the power transmission line.
As an improvement on the power transmission line, the thickness of the metal foil is less than 0.01mm, the power transmission voltage is more than 8 ten thousand volts, and the metal foil is aluminum foil or silver foil.
As an improvement of the power transmission line, the outer end of the power transmission line (5) is provided with a current transformer (10), and the power transmission line (5), the current transformer, an electron generating device or an electron gun (8) are connected in series.
As an improvement to the transmission line, in the space cable-rotating system, the electric propeller (7) is arranged at the inner end and close to the mass center (1); the electron gun (8) is at the outer end, far from the centroid (1).
As an improvement on the power transmission line, a battery (6) or a super capacitor (6) is arranged at the outer end of the power transmission line (5), and the power transmission line supplies power to the battery (6) or the super capacitor (6).
As an improvement on the power transmission line, the power transmission line (5) is a split conductor, at least four strands are provided, and a spacer is arranged at a certain distance; the electron generating device is an electric thruster (7).
As an improvement to the transmission line, both ends of the transmission line (5) are provided with electric thrusters (7).
Drawings
Fig. 1, a schematic diagram of a unidirectional transmission line.
Reference numerals
1, a central station. And 2, balancing the weight. 3, a multistrand. And 4, rotation direction. 5, power transmission line. 6, a battery or a super capacitor. And 7, an electric propeller. And 8, an electron gun. 10, a current transformer.
Advantageous effects
The power transmission line can be nested in the multi-strand rope, the multi-strand rope is used as a part of the insulating layer, and the thickness of the rubber insulating layer is reduced. Meanwhile, the centrifugal force of the transmission line can be supported by using a plurality of ropes, and the length of the cable can be very long, even reaching 50-100 km.
For a high-orbit space cable-transferring system, the metal foil on the outer layer can transmit electricity, and meanwhile, the protection effect is achieved, and resources are fully utilized. And the transmission voltage is extremely high, and the line loss is very low.
With unidirectional transmission lines, mass savings of hundreds to thousands of kg can be achieved, which is very rare for space equipment. The power is transmitted by the unidirectional power transmission line, the power only needs to go through a loop, and the power loss can be reduced from about 30% to about 10%. If the high rail is above 5000km, the power loss can be reduced to below 3%.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example one
Referring to fig. 1, a unidirectional transmission line of a space cable-rotating system only has 1 transmission line, and forms a single loop. The power line rotates around the central station 1. An electric propeller 7 is arranged at one end (inner end) of the power transmission line close to the central station 1, and an electron gun 8 is arranged at one end (outer end) far away from the central station. The electric propeller 7 generates electrons, leads the electrons into the power transmission line, and injects the electrons into the space through the electron gun 8 at the other end, thereby forming unidirectional current; the power transmission line has an insulating layer.
The electric propeller 7 mainly comprises an ion engine and a Hall propeller, is an electrically driven space propulsion device, and consists of a separation device, an ion injection device and an electron gun 8 (neutralizer), wherein the separation device decomposes atoms into ions and electrons, and the ions and the electrons are respectively emitted into the space by the ion acceleration device and the electron gun. The electric thruster 7 may be an X3 ion thruster by NASA, which in the present invention functions not to generate thrust but to generate a flow of electrons. In this embodiment, the electron gun of the electric thruster is not utilized, but is an electron gun at the other end of the cable.
The electric thruster 7 weighs 20kg and can generate 10A current, and the electron gun 8 weighs 3 kg. The transmission line uses aluminum stranded wire, and the radius of aluminum stranded wire is 0.75mm, and electric wire length 40km, the quality is 200 kg. The thickness of the insulating layer was 1mm and the weight was 380 kg. The total power line was 580 kg.
The single aluminum stranded wire is arranged on the innermost layer, and the silicon rubber is arranged outside the innermost layer and serves as an insulating layer. The silicone rubber is provided with a multi-strand rope 3 layer, and the outermost layer is a polyimide sun-proof layer. The cable system rotates while revolving too much, and the rotation direction 4 is counterclockwise, which generates a large centrifugal force. The transmission line is subjected to centrifugal forces by means of a multi-strand rope 3.
Example two
The outer end of the unidirectional transmission line is provided with a current transformer 10, and the unidirectional transmission line is firstly connected with the current transformer and then connected with an electron generating device or an electron gun 8.
The inverter 10, also called a frequency converter, is a device for changing voltage, frequency and phase of current, and has the functions of switching, power synthesis, power splitting, frequency modulation and voltage regulation. In this embodiment, a KSC600 energy storage type bidirectional converter of jiangsu linyang energy limited company is adopted.
The cable transmits direct current, the transmission voltage is 20000V, the voltage is reduced to 200V through the converter 10, and the direct current is supplied to equipment at the counterweight 2 for use.
EXAMPLE III
The outer end of the unidirectional transmission line is provided with a lithium battery 6 or a super capacitor 6. The transmission line continuously inputs 100kw of power to the lithium battery 6 or the super capacitor 6, and the lithium battery or the super capacitor supplies 1000kw of power to the load when the load at the counterweight 2 operates.
Example four
The unidirectional transmission line is a split conductor with at least 4 strands and has a transmission voltage of 20000V. Every 500 meters there is a spacer. The spacer is a common device for high voltage transmission and is used to divide the strands. Under limited transmission voltage, the transmission capacity can be increased by adding multiple strands, and the heating of each strand is not too large. The multi-strand rope 3 is often composed of a plurality of parallel ropes, and each strand of wire is arranged in the middle of one rope.
EXAMPLE five
Both ends of the unidirectional transmission line are provided with electric thrusters 7, so that the transmission line can conveniently exchange current directions.
EXAMPLE six
The outermost layer of the multi-strand rope 3 is a layer of metal foil, and the metal foil is used for power transmission. The metal foil is 0.003mm thick and the transmission voltage is 50 ten thousand volts, preferably silver foil. The outer end is provided with a current transformer 10 which reduces the voltage of the transmission line for the equipment at the position of the counterweight 2. The unidirectional power transmission line, the current transformer and the electron gun 8 are connected in series.
The silver foil and the multi-strand cord 3 are bonded together with an adhesive. The silver foil plays a role in power transmission, and plays a role in shading and protecting the multi-strand rope 3 from sunlight. The cable is very suitable for a space cable-rotating system with the track height greater than 5000km, the ionosphere and the geomagnetism at the position can be almost ignored, the breakdown problem can not be caused, and the transmission voltage can be extremely high.
Claims (10)
1. A power transmission line is used for power transmission between a central station and a counterweight (2) of a cable-over-the-air system, and a plurality of ropes (3) are connected between the central station and the counterweight, and is characterized in that:
the power transmission line (5) is a single loop, one end of the power transmission line is provided with an electron generating device, and the other end of the power transmission line is provided with an electron gun (8); the electron generating device generates electrons, the electrons are guided into the power transmission line and are injected into the space through the electron gun at the other end, and therefore current is formed.
2. A power transmission line according to claim 1, characterized in that: the power transmission line (5) is nested in the multi-strand rope; the conductive material of the power transmission line is the innermost layer, the insulating layer is arranged outside the conductive material, and the multi-strand rope (3) layer is arranged outside the insulating layer.
3. A transmission line according to claim 2, characterized in that: the conductive material is aluminum stranded wire.
4. A power transmission line according to claim 1, characterized in that: the outermost layer of the multi-strand rope (3) is a layer of metal foil, and the metal foil is used as a power transmission line.
5. A transmission line according to claim 4, characterized in that: the thickness of the metal foil is less than 0.01mm, the transmission voltage is more than 8 ten thousand volts, and the metal foil is an aluminum foil or a silver foil.
6. A power transmission line according to any one of claims 1-5, characterized in that: the outer end of the power line (5) is provided with a current transformer (10), and the power line (5), the current transformer, the electron generating device or the electron gun (8) are connected in series.
7. A power transmission line according to any one of claims 1-5, characterized in that: in the space cable-rotating system, an electric propeller (7) is arranged at the inner end and is close to the mass center (1); the electron gun (8) is at the outer end, far from the centroid (1).
8. A power transmission line according to any one of claims 1-5, characterized in that: the outer end of the power transmission line (5) is provided with a battery (6) or a super capacitor (6), and the power transmission line supplies power to the battery (6) or the super capacitor (6).
9. A power transmission line according to any one of claims 1-5, characterized in that: the power transmission line (5) is a split conductor, has at least four strands, and is provided with a spacer at certain intervals; the electron generating device is an electric thruster (7).
10. A power transmission line according to any one of claims 1-5, characterized in that: both ends of the power transmission line (5) are provided with electric thrusters (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347126.0A CN111181147A (en) | 2018-11-13 | 2018-11-13 | One-way transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347126.0A CN111181147A (en) | 2018-11-13 | 2018-11-13 | One-way transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111181147A true CN111181147A (en) | 2020-05-19 |
Family
ID=70655688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811347126.0A Pending CN111181147A (en) | 2018-11-13 | 2018-11-13 | One-way transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111181147A (en) |
-
2018
- 2018-11-13 CN CN201811347126.0A patent/CN111181147A/en active Pending
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200519 |
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| WD01 | Invention patent application deemed withdrawn after publication |