Power cable line

FIELD: electrical engineering.

SUBSTANCE: in a line for transmitting and distributing direct current a power cable line is provided, which makes easier supply of electricity to various devices used for operation of that line. The power cable line comprises power cables (1lg, 1r, 1p, 1m, 1n), which transmit and distribute direct current, a unit (2) for superimposing an alternating current component on these cables, and an electricity tap off unit (3), meant for tapping off power of the superimposed alternating current component from this cable. Unit (2) superimposes the alternating current component on the power cable, and electrical energy of the alternating current is transmitted together with electrical energy of direct current on the power cable. The tap off unit (3), located at a certain section of the cable, taps off this alternating current component and transmits it to different devices.

EFFECT: invention allows for designing a cable, which makes easier tapping off electrical energy during transmission of direct current.

4 cl, 13 dwg

 

The technical field to which the invention relates

[0001] the Present invention relates to a power cable line, intended for the transmission of direct current. It is, in particular, relates to a power cable line, which allows you to take the main electric power to supply it to various electricity-consuming devices provided on this line and used for this line.

The level of technology

[0002] currently, for the transmission of electricity use not only the transmission of AC energy, but also the transmission of DC energy. When the power transmission DC problems occurring during the transmission of AC energy, such as loss of AC power due to dielectric losses, the losses in the conductor associated with surface effects, etc. as well as a large current flowing, for example, during an accident with a short circuit, etc. and allows the transfer of large amounts of energy. There are two systems of power transmission DC - monopolar energy transfer (single-pole transfer of energy) and bipolar energy transfer (bipolar energy transfer).

[0003] When monopolar power transmission power cable 100g used as a straight line, and power cable 100r used as a return line, connected using pins 104 and 105 via the inverters 102 and 103 DC to AC, forming a closed circuit, as shown in figure 11(A). System AC source 101 AC power and a load, which is transferred to the energy connected with the converters 102 and 103. Bipolar power transmission power cable 100p used as a line of the positive pole, power cable 100m, used as a line negative pole, and power cable 100n used as a neutral line, laid in parallel and connected using pins 104p, 104m, 104n, 105p, 105m and through 105n converters 102p, 102m, 103p and 103m DC to AC, forming a closed circuit, as shown in figure 11(B). System AC source 101 AC power and a load connected to the converters 102p, 102m, 103p and 103m.

[0004] Power cable used for the transmission of DC energy, is usually a cable with solid insulation, or oil immersed cable with paper insulation, or oil-filled cable, etc. In addition to the above normal conductive cable proposed superconducting cable for power transmission DC (see, for example, U.S. Pat the private document 1).

[0005] on the other hand, to ensure the power cable line use electricity-consuming devices, such as various sensors and control devices. When using superconducting cable in addition to them also use devices such as an auxiliary cooler, auxiliary pump and an auxiliary vacuum pump.

[0006] Patent document 1: JP-A-2003-249130.

Disclosure of invention

The problem addressed by the invention

[0007] Provide a power supply system, regardless of the electric energy transmitted through the power cable, or in every place underground reservoir observation wells, etc. additionally installing the battery, alternator, etc. and use them as independent sources of power, because they can be easily and safely installed as sources of electricity to power the above electricity-consuming devices. However, if the energy from independent power sources will be lost as a result of the accident, etc. in case of an impossible state control and so on, it is impossible to ensure stable operation, which is a problem. In particular, when using a superconducting cable line, if you disconnect the power source device required for cooling hudgen is a, used to maintain the superconducting state, there is the danger of a situation of cessation of transmission energy. To avoid this situation, additional measures are needed.

[0008] Thus, the aim of the invention is to provide a power cable line, which makes it easy to take branch energy, in particular, when the power transmission DC.

The solution to these problems

[0009] To achieve this objective, according to the invention on a cable line for performing power transmission DC cables impose a variable component of the current for a junction of energy, and the variable component of the current is also passed along with energy DC. Thus, power cable line according to the invention is characterized by a power cable for the transmission and distribution of DC block overlay AC overlay the variable component of the current in the power cable and osvetleni power supply for power induced by the imposed variable component of the current from the cable.

[0010] In the transmission line power AC power above electricity-consuming devices can be implemented using the energy transmitted over the power cable. In particular, titlemy energy can be extracted, using induction connection. However, this method cannot be used when the power transmission DC, since there is no induced current. In this regard, in the invention together with the power transmission direct current is passed in the variable component of current required for branch energy, while energy otvetst using inductive connection, as in the transfer of power to AC power. The power induced by the variable component of the current, shown in otetsudai the power supply unit and is used as a power source for various electricity-consuming devices that are used to support the operation of the line. In accordance with this configuration, the line according to the invention eliminates the need for additional system and the need to provide independent power sources in the form of a battery, generator, etc. in each place where you want to provide power, and problems with loss of power independent power sources, you can exclude that allows you to ensure stable transmission of direct current and its distribution.

[0011] as a power cable, is included in the line according to the invention, it is possible to use the normal conductive cable or superconducting cable. As a normal conductive CA the El can be called oil-impregnated cables with paper insulation of the cable with oil-impregnated continuous paper insulation, gas-filled cable and oil-filled cable, etc. you Can use the well-known normal conductive cable. Cable with solid insulation has advantages, namely that it has a simple design, suitable for laying on a great distance and does not require the use of funds re-fill oil. Oil-filled cable has the advantage consisting in the fact that it does not occur the phenomenon of oil leakage in the event of a cable with solid insulation and it is especially effective on the electrical characteristics. Gas-filled cable has the advantage consisting in the fact that when using it you do not experience the problems of the transitional oil pressure, as in an oil-filled cable. In a typical configuration, a normal conductive cables cable lived with the conductor and electrically insulating layer placed on the outer periphery of the guide, and on the outer periphery of this cable core is metallic shell, etc. you Can use a single cable with one cable core, or you can use stranded cable having multiple conductors.

[0012] Although it can be used above the normal conductive cable, a superconducting cable is preferred because it has low resistivity, and is that more energy can be transferred by cable compared to the normal conductive cable. Typical superconducting cable has a construction in which one or many of the cable conductors are enclosed in insulating the pipe and is cooled by the refrigerant liquid nitrogen, etc. that filled the pipe. Available low-temperature superconducting cables insulated type and the superconducting cable normalinterpolator.h isolated type. For example, in the low-temperature cable insulated type cable lived can be made of a frame, a first superconducting layer, the electrically insulating layer and the second superconducting layer in this order from the center. In the case of veins, which includes the first superconducting layer and the second superconducting layer, it is possible to use, for example, the first superconducting layer as a layer, allowing the flow of direct current, and the second superconducting layer can be used as a layer that allows you to run a reverse current. Cable lived can be a cable core that does not have the second superconducting layer. That is, lived only includes one superconducting layer. The composition of the cable wires, not with the second superconducting layer is grounded shielding layer having the ground potential. In the case of wires, not with the second superconducting layer, using many lived, for example, superconducting, the Loy one core can be used as a layer, allowing the flow of direct current, and a superconducting layer of the second conductor can be used as a layer that allows you to run a reverse current. Cable normalinterpolator.h isolated type cable lived can be made of a frame, a first superconducting layer, insulating pipes, electrically insulating layer and a shielding layer in this order from the center. In the event of such veins when using many lived, as in the above vein, do not have second superconducting layer, for example, a superconducting layer of one core can be used as a layer, allowing the flow of direct current, and a superconducting layer of the other cores can be used as a layer that allows you to run a reverse current. As the insulating pipe is usually used insulation pipe with the design of double pipe having a vacuum layer between the inner tube and the outer tube. As a superconducting cable, as well as in normal conductive cable, you can use a single cable having one described above cable core, or you can use stranded cable having multiple conductors.

[0013] the Line according to the invention can be used for monopolar energy transfer or bipolar energy transfer; in the case of monopolar PE is Adachi energy construct a straight line and return line, and in the case of bipolar energy transfer build positive line negative line and the neutral line. For the construction of the line according to the invention using a superconducting cable can be used single core wire or stranded cable. Table 1 shows specific examples of line with the use of superconducting cables. To provide monopolar energy transfer or bipolar energy transfer using superconducting cables if you are using a cable comprising a cable core having a first superconducting layer and the second superconducting layer, located coaxially through the electrically insulating layer, as shown in table 1, the line can be constructed with a minimum number of cores. For example, when monopolar power transmission you can use a single cable that includes one cable core, is presented in table 1. Alternatively, in the case of multi-conductor cable, which includes many lived, are presented in table 1, the line can be built in-one correspondence with the veins, and multiple lines can be built with one line of the cable or line can be built with one residential, and the remaining lived can be used as a backup line. Bipolar power transmission, you can use two threads about mogilnykh cables, each of which includes one cable core, is presented in table 1; however, if you are using stranded cable comprising two conductors, are presented in table 1, the number of threads of cables can be reduced. You can use three-core cable comprising three cores and one core can be used as a backup line.

[0014]Table 1
Monopolar power transmissionBipolar power transmission
Cable lived 1

The first superconducting layer:
A straight line
The second superconducting layer:
Reverse line
Cable lived 1

The first superconducting layer:
Positive line
The second superconducting layer:
Neutral line
Cable lived 2

The first superconducting layer:
Negative line
The second superconducting layer:
Neutral line

[0015] To build a monopolar transmission line power using the cable conductors, not having a second superconducting layer, you can use is to use two cores; the first superconducting layer of one core can be used as a straight line, and the first superconducting layer of the other cores can be used as a return line. The cable may be a single cable with two conductors, enclosed in a separate thermal insulation pipes, or may be a multi-conductor cable with two conductors, enclosed in one of the insulating tube. To build a bipolar transmission line power using the cable conductors, not having a second superconducting layer, you can use three cores, the first superconducting layer of one core can be used as a positive line, the first superconducting layer of the second conductor can be used as a negative line, and the first superconducting layer, the remaining strands can be used as a neutral line. The cable may be a single cable with three conductors, enclosed in a separate thermal insulation pipes, or may be a multi-conductor cable with three conductors, enclosed in one of the insulating tube. Lived without a second superconducting layer, provided with a grounded shielding layer, which has the ground potential.

[0016] In each of the above lines alternating current may be superimposed on the first superconducting layer or veroispovedal layer, if you use a cable lived with the second superconducting layer. If you use a cable lived without the second superconducting layer, an alternating current is superimposed on the first superconducting layer.

[0017] When using a normal conductive cable normally conductive layer corresponding to the second superconducting layer is not included. Then there is the layer which corresponds to the second superconducting layer. In particular, the layer-electrode may be provided coaxial conductor, which uses a conductive material made of copper, etc. on the outer periphery of the electrically insulating layer, or the cable (wire)with traveler Explorer that allows you to run a reverse current, and cable (wire)with(AE) conductor, allowing the flow of direct current, may be provided separately, as in the case of a superconducting cable, not having the second conductive layer. In the first case, an alternating current may be superimposed on the conductor or on the layer-electrode. In the latter case, the alternating current may be imposed on the conductor.

[0018] In a more specific configuration of the line monopolar power transmission power cord (or cable lived, which is used in this paragraph in a similar sense), used as a straight line, and the power cord is used as the return line, connected to the output the AMI through the Converter AC to DC Converter DC to AC with the formation of a closed circuit. Power source AC is connected to one end of the cable to be used as a straight line, the load connected to the opposite end of this cable, and one end of the cable, which is used as a return line, grounded. This configuration allows the load to use the energy transmitted in the form of direct current from a source of AC power. In a more specific configuration of the line bipolar energy transfer power cable, used as a positive line, power cable, used as a negative line, and a power cable that is used as a neutral line connected in parallel with the findings through the Converter AC to DC Converter DC to AC with the formation of a closed circuit. Power source AC is connected to one end of the cable, used as a positive line, and the load connected to the opposite end of this cable. Power source AC is connected to one end of the cable that is used as a negative line, and the load is connected to the opposite end of this cable. One end of the cable that is used as a neutral line is grounded. This configuration allows the load to use the energy transmitted in the form of DC power from AC power that is and.

[0019] In the invention enabled the block overlay AC designed for overlay on the line of the variable component of current, and a power supply unit designed for branch power induced by the variable component of the current. As the area of the block overlay AC can be used, for example, the station where the line serves DC, in particular, near the Converter AC to DC, is connected to a source of AC power. Overlay AC electric power is set at any level of power required to power electricity-consuming devices, with excess energy AC does not impose, so that the transfer of DC energy is not violated. That is imposed by the energy of the AC set at a sufficiently low level relatively constant current transmitted to the load. Alternating current may be superimposed on the first superconducting layer or the second superconducting layer, if the cable is a superconducting cable; AC current may be superimposed on the conductor or layer-electrode provided on the outer periphery of the electrically insulating layer, if the cable is a normal conductive cable. As a specific configuration of the unit nalog is of alternating current, for example, you can name the configuration, which includes a conversion unit (Converter)connected to the source of AC power and is able to change the variable component of the current to any desired value. In this configuration, the conversion unit allows you to adjust the variable component of the current to any desired power value. In addition, as a block overlay AC can be called the AC overlay AC, intended for applying a variable current component using induction connection. In particular, it is possible to use a configuration that includes a magnetic substance located on the outer periphery of the cable core (or output connecting veins), a member of the power cable, and a winding connected to a source of AC power, which may be alternating current, it is possible to use a winding wound around the magnetic substance. In this configuration, the current from the power source of alternating current flows through the coil, causing the magnetic substance attached a magnetic field, and current flows in the cable core (or core through output) in accordance with the magnetic permeability of the magnetic field and the magnetic substance; this configuration is more advantageous to perform transmission energiekosten current with high current, than the above-described configuration, includes a conversion unit. As the magnetic material, in particular, it is preferable to use a substance made of a ferromagnetic body having a high magnetic permeability, such as ferrite core. As the magnetic material suitable substance in a form similar to the ring that uses a lot of divided pieces in combination to be easily installed around the outer periphery of the cable core or output. The winding is formed from a material having electrical conductivity. You can use the well-known inductive connector.

[0020] Preferably, otvetyi the power supply unit has a configuration that uses induction connection, allowing you to easily select the branch of electricity. In particular, can be called a configuration that includes a magnetic substance placed on the following area of separation or on the outer periphery of the area where the reverse current does not flow in the second superconducting layer, and a winding wound around the outer periphery of the magnetic material and connected to various electricity-consuming devices, where there is alternating current. In this configuration, the magnetic substance is a magnetic field due to variable costal is the fact that current superimposed on the power cable, and an AC current flows through the coil in accordance with the magnetic permeability of the magnetic field and the magnetic material that allows you to provide power to various electricity-consuming devices. As the magnetic material, in particular, it is possible it is preferable to use a substance made of a ferromagnetic body having a high magnetic permeability, such as ferrite core. As the magnetic material suitable substance such ring shape using many of the separated pieces in combination in order to be easily fitted on the outer periphery of the power cable. The winding is made of a material having electrical conductivity.

[0021] When used as a power cable, DC cable, which includes a layer in which a direct current (which will be below called direct layer), and a cable comprising a layer in which the reverse current (which will below be called back layer), mounted coaxially on the opposite layer, current flows in the opposite direction of the direct current, and therefore the magnetic field generated by the reverse current balances the magnetic field generated by direct current, and the resulting magnetic field outside the cable is almost equal to N. the Liu. For example, in the superconducting cable comprising spaced coaxial first superconducting layer and the second superconducting layer, using the first superconducting layer as a direct layer and the second superconducting layer as a reverse layer of the second superconducting layer acts as a screen. Thus, on the site where the included reverse the layer, it becomes impossible to take energy through inductive coupling. Therefore, the cable comprising spaced coaxial straight layer and back layer above otvetyi the power supply unit is preferably placed on the area of separation, where the straight layer and back layer are not coaxial. As the site, which includes the area of separation, can be called a unit of a mutual connection, intended for the connection of cables and block external connections, intended for the connection cable and external devices. In the power cable lines typically comprise a cable layers in the form of a shielding layer (back layer), electrically insulating layer, etc., manual bare, and processed by the connection in the connection block and, thus, forming a part where the outer surface of the straight layer is not closed-back layer, namely the area of separation, where the straight layer and back layer are not races is orogeny coaxial. On this site, the separation of the magnetic field generated by current flowing in the forward layer, and a magnetic field generated by current flowing in the opposite layer, do not compensate each other, and thus, any of these magnetic fields can be used for branching and selection of the power connection block, using induction link.

[0022] When using two cable conductors, each of which includes located coaxially of the first superconducting layer and the second superconducting layer, and using the first superconducting layer of these veins as positive and negative lines, and second superconducting layers of these lived - in as a neutral line for bipolar energy transfer, it is obvious that a constant current flows in the second superconducting layers lived. So otvetyi the power supply unit can be provided even at the site where the first superconducting layer and the second superconducting layer are coaxially aligned.

[0023] When using a superconducting cable having a second conductive layer, otvetyi the power supply unit may be provided on any desired part of the cable.

[0024] When using a cable having a layer of electrode used as the back layer in the normal conductive cable, otvetyi block power is Tania may be provided in the block mutual connection or block external connections similar to those described above. When using two cable conductors, each of which includes spaced coaxial conductor layer and the electrode, and when using conductors lived as positive and negative lines, and layers of electrodes lived - in as a neutral lines for bipolar energy transfer, otvetyi the power supply unit can be provided even in the area where the conductor layer and the electrode are coaxially aligned, as described above. When using a normal electrically conductive cable having a layer of electrode used as the back layer, otvetyi the power supply unit may be provided on any desired part of the cable.

[0025] In particular, as a typical block configuration of the mutual connection of superconducting cables can be called the following configuration: in this description as an example of the use of superconducting cables, each of which includes a second superconducting layer. Veins that are part of the two adjacent cables, set back to back with each other, the second superconducting layer in each period is partially bare in order to open the electrically insulating layer and the first superconducting layer, the exposed part of the first superconducting layers are connected to each other and around the area of connection form the insulating segment pok is itia. The second superconducting layers on the electrically insulating layer in veins cable included in the installed butt lived or lived adjacent, connected to each other. Cut insulating coating and the connection block of the second superconducting layer are surrounded by a reservoir with refrigerant and immersed in the refrigerant. A tank of refrigerant is surrounded by a vacuum vessel, and the space between the reservoir with coolant and vacuum tank vacuumed for forming a unit of a mutual connection.

[0026] as a typical block configuration of the external connection of the superconducting cable, you can call the following configuration: carton outer join with a tank of refrigerant, which is closed by a vacuum tank, while the end of the superconducting cable in the horizontal direction is introduced into a tank of refrigerant in a vertical direction in a tank of refrigerant introduced one end of the rod o, the opposite end of the rod o is output outside from the vacuum tank, and one end of the rod o, and the end of the superconducting cable is connected directly or indirectly in the tank with refrigerant. Core conclusion can be made, for example, from part-conductor made of copper, aluminum, etc. and insulating sleeve reinforced alocrom plastic, etc., covering the outside of the item Explorer.

[0027] For the above-described block mutual connection of superconducting cables and block external connections to the tank with coolant or vacuum tank can be branched for each core, if you are using stranded cable. For example, for a superconducting cable having three wires, you can use the fork only tank with refrigerant and together establish the three cores in a vacuum tank. Thus, many are lived in the connection block, with a tank of refrigerant supplied blocks branching refrigerant, one for each core, for making them areas of separation, and vacuum tank covers together all the blocks branching of the refrigerant. In this configuration, otvetyi the power supply unit is formed on the area of separation block branching refrigerant.

[0028] in Addition, in the case of a superconducting cable can be branched as a reservoir for the refrigerant, and a vacuum tank. Thus, many lived installed in the connection block, with a tank of refrigerant supplied blocks branching refrigerant, one for each core, for making them areas of separation, and vacuum tank made with blocks branching vacuum that cover blocks rasvet the population of the refrigerant. In this configuration, otvetyi the power supply unit is formed on the area of separation block branching vacuum.

[0029] on the other hand, in the case of line with many-core superconducting cables, each of which has a second superconducting layer, mounted in parallel, preferably separate blocks connections formed in one correspondence with a single-core cables are installed in parallel, and branch energy taken from the power connection connecting the separate parallel blocks the connection. Thus, the connection block has a block short circuit, designed to short circuit the second superconducting layers cables between adjacent individual blocks connections formed in one correspondence with a single-core superconducting cables. Blocks short circuit become the area of separation, where the first superconducting layer and the second superconducting layer are not coaxial. In this configuration, otvetyi the power supply unit may be provided in the block short circuit.

[0030] When used as a power cable, the above-described superconducting cable otvetyi the power supply unit may be provided in at least one place from the inside of the tank with refrigerant, VNU the arrangement of the vacuum tank outside the tank with refrigerant and outside the vacuum tank. There is usually a strand superconducting cable comprising a second superconducting layer, where the exposed part of the second superconducting layer contains electrically insulating layer and has a large diameter and a portion separated from the veins and contains only the second superconducting layer has a small diameter. Therefore, preferably, otvetyi the power supply unit provided on the site, containing only the second superconducting layer. Thus, in the case of a line using a superconducting cable comprising a second superconducting layer, the following sites in the connection block can be listed as specific examples of the area of separation, which provides otvetyi power supply:

(1) the site where the first superconducting layer in the conductor not covered with the second superconducting layer;

(2) if the cable includes many lived, the unit is short circuit, in which the second superconducting layers of different lived (e.g., positive and negative conductors) close short in the state in which the first superconducting layers are connected near the site of connection of the first superconducting layers lived;

(3) the wiring connecting the second superconducting layers both lived in parallel with the site of connection of the first superconducting layer by setting the butt of the pair lived.

[0031 For monopolar transmission line energy otvetyi the power supply unit may be provided only in a straight line, there may be only in the return line, or may be provided as in a straight line and a return line. In the case of a bipolar transmission line energy otvetyi the power supply unit may be provided in at least one line from the positive line negative line and the neutral line; for example, it may be provided only in the positive line, may be provided in the positive line and a negative line, or may be provided on all lines in a positive line negative line and the neutral line.

[0032] During the installation described above otetsudai power supply unit magnetic field superimposed on the AC current generated by the induced current, and this current can be abstracted out from the connection block via an additional wire pins, attached to otetsudai power. When otvetyi power supply is located inside the tank with refrigerant, wire findings is passed through a tank of refrigerant and vacuum tank and output from the connection block; when otvetyi power supply is located inside the vacuum tank outside the tank with refrigerant, wire findings pass through the vacuum tank and are ejected from the connection block. At the same time, prefer the Ino, part of the wires conclusions, passing in the tank with refrigerant or in the vacuum tank is sealed with an airtight seal, etc.

[0033] the above-Described otvetyi the power supply unit is connected via wire output with different electricity-consuming devices used to provide operation power cable, and the electric power taken in otetsudai the power supply unit, served in this electricity-consuming device. As electricity-consuming devices, you can specify various sensors and control devices, in addition, if the cable is a superconducting cable, can be called an auxiliary cooler, auxiliary pump, an auxiliary vacuum pump, etc.

[0034] After the variable component of the current extracted above osvetleni power supply imposed by the variable component of the current almost will not be transferred to the load. However, to reliably reduce the occurrence of the variable component of current to the load may be a filter. Such a filter is placed near the load, which is transferred to the energy DC. As the site of installation of the filter include, for example, a site located near the place where the alternating current, in which the conversions is t DC served in a line, in particular, on the load side after converting alternating current using a DC-to-DC to AC. The filter can be integrated in the inverter DC to AC. As a filter, you can use the filter attenuation imposed by the variable component of the current and allowing you to pass through it to direct current.

Advantages of the invention

[0035] the Power cable line according to the invention includes the described configuration allows you to take advantage consisting in the fact that energy can easily be served in a variety of electricity-consuming devices used to support the operation of the line, by applying the variable component of the current in the power transmission DC. In particular, when using a superconducting cable as the power cable can run the power transmission DC with a large bandwidth compared to the normal conductive cable.

Brief description of drawings

[0036] figure 1 schematically illustrates the configuration of the power cable line according to the invention; (A) shows a monopolar line energy transfer, and (B) shows a bipolar transmission line energy.

Figure 2 schematically shows the configuration of a block overlay AC what about the current included in the line according to the invention; (A) shows a configuration that includes a conversion unit, and (B) shows a configuration that includes the induction unit connection.

Figure 3 shows a view in section of a superconducting cable core packet type.

Figure 4 schematically shows the configuration, including titulada power supply units in the block mutual connection three-core superconducting cables, and presents a configuration in which three wires are installed in the same tank with refrigerant and one vacuum tank, this unit has a short circuit connecting the second superconducting layers lived constituting a different line.

Figure 5 illustrates a configuration in which there is a power short circuit designed to connect the blocks of a short circuit in the block mutual connection three-core superconducting cables, shown in figure 4.

Figure 6 schematically shows the configuration, including titulada power supply units in the block mutual connection three-core superconducting cables, and presents a configuration in which three wires are installed in the same tank with refrigerant and one vacuum tank, and a wiring connecting the second superconducting layers lived components of the same line.

7 with amatice the configuration, includes titulada power supply units in the block mutual connection three-core superconducting cables, and presents a configuration in which a tank of refrigerant branched for each core, and a vacuum tank closes at the same time all parts of the branch tank with refrigerant.

On Fig schematically shows the configuration, including titulada power supply units in the block mutual connection three-core superconducting cables, and presents a configuration in which the reservoir with coolant and vacuum tank branched for each core.

Figure 9 schematically shows the configuration, including titulada power supply units in the block mutual connection single-core superconducting cables.

Figure 10 is a schematic representation of a configuration that includes otvetyi power supply unit interconnection normal conductive cables; (A) shows an example that includes otvetyi the power supply unit on the outer periphery of the connecting line, and (B) shows an example that includes otvetyi power supply on the external periphery of the connection block connecting casing.

Figure 11(A) schematically shows the configuration of monopolar transmission line energy, and figure 11(B) schematically shows the con is horatia bipolar transmission line energy.

Description reference positions

[0037] 1g, 1r, 1p, 1m, 1n power cable; 2, 2A, 2B block overlay AC; 2a ferromagnetic body; winding 2b; 3 otvetyi power supply;

10a, 10b, the source of AC power; 11 Converter AC to DC; 11p first Converter AC to DC;

11m second Converter AC to DC;

12 inverter DC to AC;

12p first inverter DC to AC;

12m of the second inverter DC to AC;

13, 13p, 13m, 13n, 14, 14p, 14m, 14n output;

15 frame; 20 first superconducting layer; 30 electrically insulating layer; 40 second superconducting layer;

50 protective layer;

31 block insulating coating; 41 unit short circuit; 41a wiring short circuit; 42 wiring;

60 normal conductive cable; 61 shell; 62 connecting the casing; 63 connecting line; 64 block articulation;

100 superconducting cable; cable 110 lived; 120 insulating pipe;

121 corrugated inner tube; 122 corrugated external pipe; 123 space; 124 layer of corrosion protection;

200 block of interconnection; 210 tank with refrigerant; 211 unit branching the refrigerant; 212 unit connection refrigerant; vacuum tank 220; 221 blocktitle vacuum; 222 unit connection vacuum;

250 unit selectable connection;

300 block connections one core.

The best ways of carrying out the invention

[0038] the Following will describe a variant embodiment of the invention. For a start, will be described the overall configuration of the line according to the invention.

[0039] (Overall configuration of the line)

1 schematically shows the configuration of the power cable line according to the invention; (A) shows a monopolar line energy transfer, and (B) shows a bipolar transmission line energy. Identical parts are denoted by the same reference positions on the following attached drawings. Line according to the invention includes power cables (1g, 1r, 1p, 1m, 1n) to perform transmission and distribution of electricity DC block 2 overlay AC, designed to overlay the variable component of the current on the cable, and titulada blocks 3 power supply designed to power take-induced imposed by the variable component of the current from the cable. Monopolar line energy transfer and bipolar transmission line energy will be described separately.

[0040] <Monopolar line power transmission>

In the invention monopolar line transmission power includes power cable 1g used as a straight line, and power cable 1r used as clicks the percentage line, and both cables 1g and 1r are connected to pins 13 and 14 through the inverter 11 AC to DC and the inverter 12 DC to AC, forming a closed circuit, as shown in figure 1(A). Source 10a AC power is connected to one end of the cable 1g used as a straight line, and the load connected to the opposite end of the power cable. The Converter 11 AC to DC converts alternating current source 10a AC power to DC and the inverter 12 DC to AC converts the supplied DC current to AC current. One end of the cable 1r, used as a return line, grounded. In accordance with this configuration, the DC current power transmitted from the source 10a DC power supply through a transformer 11 AC to DC in a straight line, is passed to the load through the inverter 12 DC to AC. As the line according to the invention in such a monopolar transmission line energy includes a unit 2 overlay AC, designed to overlay the variable component of the current on the cable. In this example, the block 2 overlay AC output 13 near the Converter 11 AC to DC. In the example shown in figure 1, block 2 overlay AC is omeman in conclusion 13 on the side opposite the line Converter 11 AC to DC, but can be installed not only on the side of the straight line Converter 11 AC to DC, but also on the load side (on pin 14), in particular on the plot shown in figure 1 the square And dotted line.

[0041] Block 2 overlay AC is connected to the source 10b AC power to impose the variable component of the current to any desired value on power cables 1g and 1r. Detailed configuration is described below. Line according to the invention includes titulada blocks 3 power cables 1g and 1r for selection of the variable component of the current imposed on the cables 1g and 1r. Titulada blocks 2 power supply used in this example are for selection of the variable component of current inductively. Detailed configuration is described below.

[0042] In accordance with the above-described configuration, the line according to the invention makes it easy to select the variable component of the current imposed on the power cable, while he performs transmission and distribution of DC energy. Therefore, the selected energy can be served in various electricity-consuming device used for the operation of the line, and there is no need to provide additional independent power sources. Select the CN is the rgiya served in various electricity-consuming devices by connection otetsudai unit 3 power supply and these electricity-consuming devices using wires, pins, and so on

[0043] In this example, otvetyi the power supply unit is provided on a straight line and the return line, but may be provided on only one of these lines. When installed otetsudai power supply unit only in a straight line can be installed filter, weakening the variable component of the current passes through only the DC component of the current to reliably reduce transmission to the load imposed by the variable component of the current. Such a filter can be installed on the load side after conversion to alternating current using an inverter 12 DC to AC, in particular in the area B indicated by a circle shown by the dotted line in figure 1(A), or may be built into the inverter 12 DC to AC.

[0044] In use the power cable can be used a single strand single core cable including first and second superconducting layers (or layers, electrodes, or can be used stranded cable formed by twisting together two or more cable conductors comprising first and second superconducting layers (or layers-electrodes). When using stranded cable is lived, not used for energy transfer, can be used as a backup line. Lived used for PE is Adachi energy, form a line, which uses the first superconducting layer, the second superconducting layer is included in the same vein. Alternatively, you can use two lines of single-core cables, do not include the second superconducting layer (or layer-electrode), or you can use stranded cable formed by twisting together two or more cable conductors, which does not include the second superconducting layer (or layer-electrode). When using multiconductor cable number of wires for the straight line and the number of cores for a return line set the same. When using stranded cable is lived, not used for energy transfer, can be used as a backup line. Veins used for energy transfer, form a line, which applies the first superconducting layer of one core and the first superconducting layer of the other veins. Cable (wire), not including(th) in the second superconducting layer (or layer-electrode)with(a) a grounded shielding layer when a voltage is ground potential.

[0045] <a Bipolar transmission line energy>

According to the invention the bipolar transmission line energy includes power cable 1p used as the line of the positive pole, power cable 1m, used as a line negative pole, and with the power cable 1n, used as a neutral line connected in parallel, and cables 1p and 1n are connected using pins 13p, 13n, 14p and 14n through the first Converter 11p AC to DC and the first Converter 12p DC to AC, and cables 1m and 1n are connected by conclusions 13m, 13n, 14m and 14n through the second Converter 11m AC to DC and the second Converter 12m DC to AC, forming a closed circuit, as shown in figure 1(B). Source 10a DC power supply connected to one end of the cable 1p, used as a positive line, and the load connected to the opposite end of this cable. The first Converter 11p AC to DC and the second Converter 11m AC to DC converts alternating current source 10a AC power to DC, and the first Converter 12p DC to AC and the second Converter 12m DC-DC converts the supplied DC current to AC current. One end of the cable 1n, used as a neutral line (in this example, on the load side)is grounded. In accordance with this configuration, the DC current power transmitted from a source 10a AC power through the Converter 11p, 11m AC to DC in cable 1p, 1m, served on the load h is cut Converter 12p, 12m DC to AC. As the line according to the invention in such a bipolar transmission line energy includes a unit 2 overlay AC, which is designed to overlay the variable component of the current on the power cable 1p, 1n. In this example, the block 2 overlay AC is connected next to the first Converter 11p AC to DC to the conclusion 13p. In the example shown in figure 1, block 2 overlay AC is located on the side of the neutral line of the first Converter 11p AC to DC on the output 13p, but can be placed not only on the side of the positive line of the first inverter 11p AC to DC, on the side of the neutral line of the second Converter 11m AC to DC, on the side of the negative line of the second Converter 11m AC to DC source 10a AC power cable 1n, but also on the load side (on pin 14p, 14n, 14m), in particular, in the area of the square And represented by a dotted line in figure 1.

[0046] Block 2 overlay AC is connected to the block 10b power source for applying a variable current component corresponding value on power cables 1p and 1n. Detailed configuration of the block 2 overlay AC described below. Line according to the invention includes himself titulada blocks 3 power cables 1p and 1n for selection of the variable component of current, imposed on the cables 1p and 1n. Titulada blocks 3 power supply used in this example are for selection of the variable current component using inductive coupling, and its detailed configuration is described below.

[0047] In accordance with the above-described configuration, in the line according to the invention can easily select the variable component of the current, although it performs the transmission and distribution of energy, DC, as well as in monopolar transmission line energy. Therefore, the selected energy can be served in a variety of electricity-consuming devices intended for the operation of the line. Select energy served in various electricity-consuming devices by connection otetsudai unit 3 power and electricity-consuming devices using wires, pins, and so on

[0048] In this example, otvetyi the power supply unit is provided on the positive line and the neutral line, but it may be provided on at least one of the positive line negative line and the neutral line; for example, it may be provided only on the positive line, may be provided on the positive line and negative line, or may be provided on all three lines. When installed otetsudai b is the eye of the negative power line, the AC overlay AC is connected to the output 13m. When installed otetsudai power supply unit only on the neutral line, the AC overlay AC can be provided on one of the conclusions 13p, 13m or 13n. When installed otetsudai power supply unit only on the positive line or the negative line, can be installed filter, weakening the variable component of the current passes through only the DC component of the current to reliably reduce transmission imposed by the variable component of the current to the load. Such a filter can be installed on the load side after conversion to alternating current of the first Converter 12p DC to AC, on the load side after conversion to alternating current of the second Converter 12m DC to AC, in particular, in the area of circle B, represented by a dotted line in figure 1(B), or may be embedded in the second Converter 12p, 12m DC to AC. In addition, in this example, the grounded one end only of the neutral line, but can be grounded at both ends.

[0049] In use the power cable can be used two lines of single conductor cables, comprising first and second superconducting layers (or layers, electrodes, or can be used duil the NYY cable, obtained by twisting together two cable conductors comprising first and second superconducting layers (or layers-electrodes). Can be used stranded cable comprising three or more veins, and lived, not used for energy transfer, can be provided as a backup line. Veins used for energy transfer, form a line, which uses the first superconducting layer and the second superconducting layer included in these two lived. Alternatively can be used three threads single-core cables, do not include the second superconducting layer (or layer-electrode), or can be used stranded cable, obtained by twisting together three or more cable conductors, which does not include the second superconducting layer (or layer-electrode). When using single-core cables in three or more threads or stranded cable with three or more conductors lived, not used for energy transfer, can be used as a backup line. Veins used for energy transfer, form a line, using the first superconducting layer of one core, the first superconducting layer of the other conductor and the first superconducting layer of one core. Cable (wire), not including(th) in the second superconducting layer (or layer-electrode)with(a) sasem the military shielding layer, which when a voltage is ground potential.

[0050] <Block overlay AC>

Figure 2 shows the circuit block configuration overlay AC, included in the line according to the invention; (A) shows a configuration that includes a conversion unit, and (B) shows a configuration that includes an inductive coupling unit. Unit 2A overlay AC, shown in figure 2(A), includes a conversion unit, coupled to the source 10b AC power supply to convert AC energy. The energy from the source 10b AC power is changed to the appropriate value by the conversion unit, and the variable component of the current is superimposed on the output 13. In accordance with this configuration, the variable component of the current can flow through power cable (see figure 1) through the output 13, and the constant component of the current can flow from the use of the transducer 11 AC to DC.

[0051] Block 2B overlay AC, shown in figure 2(B), includes a ferromagnetic body 2a installed on the outer periphery of the output 13, and the winding 2b is wound spirally around the outer periphery of the ferromagnetic body 2a and is connected to the source 10b AC power, resulting in energy alternating current flows through the winding. In the data example as a ferromagnetic body 2a used the body made of ferrite core in the form of a ring using a pair of semicircular arc pieces in combination so as to be easily fitted on the outer periphery of the output 13. To perform winding 2b used a conductive material. In block 2B overlay AC alternating current flows through the winding 2b from source 10 AC power, resulting in a magnetic field applied to the ferromagnetic body 2a, and an alternating current flows through the output 13 in accordance with the magnetic permeability of the magnetic field and the ferromagnetic body 2a. In accordance with this configuration, the variable component of the current can flow through the output 13 in the power cord (see figure 1), and the constant component of the current can flow from the use of the transducer 11 AC to DC. The AC overlay AC based on inductive coupling, is especially preferred when the line is used superconducting cable which can transmit energy DC high capacity. Energy imposed by the block overlay AC, set equal to the transmitted power DC or less so as not to interfere with the transmission and distribution of DC.

[0052] (Otvetyi power supply)

As a researcher is as power cable, used in line according to the invention can be used normal conductive cable or superconducting cable. In particular, the following will be described the configuration and status of the host otetsudai power supply unit using a superconducting cable.

<a Superconducting cable>

First, before describing otetsudai power supply unit, is disclosed configuration of the superconducting cable used for this line. Figure 3 shows a view in section of a superconducting cable core packet type. The cable 100 is a low-temperature cable isolated type and has three cable core 110 enclosed in insulating the pipe 120. Each lived 110 has a frame 15, the first superconducting layer 20, the electrically insulating layer 30, the second superconducting layer 40 and the protective layer 50 in this order from the center. The superconducting wire is used for the first superconducting layer 20 and the second superconducting layer 40. In this superconducting cable of the first superconducting layer of one core is used as the positive line, the first superconducting layer of the other wires is used as a negative line, and the second superconducting layers of these two veins are used as a neutral output, allowing bipolar power transmission. The rest lived to moreopportunities as a backup line. The first superconducting layer of each core is used as a straight line, and the second superconducting layer of the same conductor is used as a return line, so you can perform monopolar power transmission.

[0053] <<Frame>>

As the frame 15 can be used a solid body obtained by twisting together of the metal wires, or a hollow body, which is a metal pipe. As an example, solid frame, you can specify the body obtained by twisting together individual copper wires. When using a hollow inner frame part of the frame can be used as a channel for the flow of refrigerant.

[0054] <<a First superconducting layer>>

As a first superconducting layer 20 is suitable ribbon wire having a lot of oxide high-temperature superconducting strands, covered with a silver shell. Here we use the ribbon wire on the basis of Bi2223. Tape the wire wound around the armature in the form of multiple layers for the formation of the first superconducting layer 20.

[0055] <<electrically insulating layer>>

Electrically insulating layer 30 is formed on the first superconducting layer 20. Electrically insulating layer 30 may be formed by winding the matter with the laying of Kraft paper and polymer film of polypropylene is Elena etc. each other (PPLP: registered trademark, produced by Sumitomo Denkikougyou Kabushikikaisha), etc., for example, around the outer periphery of the first superconducting layer 20.

[0056] <<a Second superconducting layer>>

The superconducting cable used in this example includes the second superconducting layer 40 located coaxially with the first superconducting layer 20 on the outer side of the electrically insulating layer 30. The second superconducting layer 40 is formed by winding a superconducting wire, similar to that used for the first superconducting layer 20 around the outer side of the electrically insulating layer 30. The second superconducting layer 40 is used as a return line when monopolar power transmission or is used as a neutral line in bipolar energy transfer.

[0057] <<a Protective layer>>

Next, the protective layer 50 formed on the first superconducting layer 40. The protective layer 50 is mechanically protects the internal structure of the second superconducting layer 40 to the frame and formed by winding Kraft paper or fabric tape around the second superconducting layer 40.

[0058] <<Insulation pipe>>

Insulating tube 120 has a structure of a double pipe in the form of a corrugated pipe 121 stainless steel and corrugated outer tube 122 stainless the steel. Usually between the corrugated inner tube 121 and a corrugated outer tube 122 formed space and vacuum. Superisolated (Superinsulation is the trading name) is placed in this evacuated space to reflect radiated heat. In the inner corrugated tube 121 space 123, surrounded by the inner peripheral surface of the inner tube 121 and the outer peripheral surfaces of the cable conductors 110, filled with the refrigerant in liquid nitrogen and so on, resulting in cooling of the first superconducting layer 20 and the second superconducting layer 40 to maintain the superconducting state. Used as refrigerant liquid nitrogen also performs the function of electrical insulation. Layer 124 corrosion protection, formed of polyvinyl chloride, is formed on the corrugated outer tube 122.

[0059] Next, with reference to figure 4 will be described a configuration that includes otvetyi power supply is designed for selection of branch power as a power source of various electricity-consuming devices used for the operation of the line, in block interconnection above-described superconducting cable.

[First example otetsudai power supply unit]

Figure 4 schematically shows the configuration block is and the mutual connection of the superconducting cable. Here, for convenience of description only shows two cores; however, actually, there are three veins. In cable conductor 110 figure 4 thick solid line denotes the first superconducting layer of each core and the dotted line denotes the second superconducting layer. The area where the thick solid line and dotted line are parallel, is an area where in fact the second superconducting layer is located coaxially with the outer side of the first superconducting layer through the electric insulating layer. Similar comments apply to the connection block shown in each drawing before and after figure 5, described below.

[0060] Block 200 mutual connection, shown in figure 4, has the configuration in which the ends of the pairs of superconducting cables are installed back to back to each other, and three cores 110, forming a single cable, installed end-to-end to the cores, forming another cable for the connection. When forming unit 200 of the joint in which the ends of the lived 110 are installed back to back to each other, initially perform the step of Stripping, in which the bare ends of the first superconducting layer 20, the electrically insulating layer and the second superconducting layer 40. The first superconducting layers 20 are installed end-to-end lived 110 are combined to form wiring conductors. When installing butt lived 110 veins corprew the included cables, used to build the same line, set back to back with each other. For example, mine used as a positive line in one of the superconducting cable, and mine, used as a positive line in another superconducting cable, set back to back with each other. The block 31 of the insulating coating is formed by winding insulating paper, etc. around the outside of the wiring conductors.

[0061] At the ends of the second superconducting layer 40 these second superconducting layers 40 lived components of different lines, shorts using block 41 short circuit. This means that the second superconducting layers 40 lived different lines connect using block 41 short circuit the left and right unit 31 of the insulating coating between them, forming a closed circuit. If you use wire with a sheath, which has good flexibility, the second superconducting layers 40 can be easily connected and provides excellent performance connection.

[0062] the ends of the lived 110, blocks 31 of the insulating coating and the blocks 41 short circuit installed in the tank 210 with the refrigerant. In the tank 210 with the refrigerant is a refrigerant such as liquid nitrogen, etc. that are distributed for cooling the superconducting wires used in the connection block at a very low temperature, spadarinia in their superconducting state. Vacuum tank 220 is located outside the tank 210 with the refrigerant for heat insulation.

[0063] In block 200, the connection between the block 31 of the insulating coating and the end of the superconducting layer 40 there is not covered with the second superconducting layer 40 station, where the electrically insulating layer has been removed. This plot is used as the area of separation, and otvetyi unit 3 power supply is installed on the outer periphery of the area of separation. In this case, the AC overlay AC imposes a variable component of the current on the first superconducting layer 20.

[0064] In this example, as otetsudai unit 3 power supply device is used for selection of AC energy inductively. In particular, it includes a ferromagnetic body is installed on the outer periphery of the area of separation, and the winding (not shown), helically wound around the outer periphery of the ferromagnetic body. Figure 4 shows the state in which the annular ferromagnetic body can be seen along the diametrical direction from the outer periphery. In this example, as the ferromagnetic body is body, made of the ferrite core in the form of a ring using a pair of semi-circular arcuate pieces in combination in order to easily be mounted outwardly on the periphery of the area of separation. For winding used conductive material. In this example, titulada blocks 3 power supplies installed in the state in which they are immersed in the refrigerant. Using a magnetic field generated by an alternating current flowing through the first superconducting layer 20, on the area of separation, there is the induced current flowing in the winding otetsudai unit 3 power supply, which are selected through a non-illustrated wire output. Wire output passes through the reservoir 210 with the refrigerant and vacuum tank 220 and exits out of the connection block. In this part, passing through the reservoir 210 refrigerant and vacuum tank 220, sealed airtight seal.

[0065] the End of the conclusion connected with any of the various electricity-consuming devices that are required to ensure operation of the superconducting cable, for example with a sensor and control device and other devices, such as an auxiliary cooler and the auxiliary pump. In accordance with the used components of the electricity-consuming device can be powered using AC energy taken OSVETLENIE the power supply units.

[0066] In figure 4 the part where deleted the second superconducting layer 40 and the exposed electrically insulating layer, is used as the area of separation,and otvetyi unit 3 power supply posted on this site separation. However, as another area of separation can also be used, for example, block 41 short circuit of the second superconducting layer 40. Because the block 41 short circuit represents a portion where the second superconducting layer 40 is separated from the first superconducting layer 20, and they are not coaxial, the magnetic field generated by flow of current through both of these layers 20 and 40, do not compensate each other, and the energy can be extracted using otetsudai unit 3 power supply. In this case, the AC overlay AC imposes a variable component of the current on the second superconducting layer 40 (the return conductor or neutral conductor). Figure 4 titulada power supply units installed on many sites that you can use as the site of separation, but you can choose any of them and install it otvetyi the power supply unit. Similar comments apply to the description before 5 and after it.

[0067] In this example was described superconducting cable having a second superconducting layer, but can also be used superconducting cable that does not have the second superconducting layer (however, having a grounded shielding layer ground potential). For example, in bipolar transferring energy of the first superconducting layer of one core can use the with positive line, the first superconducting layer of the other cores can be used as a negative line, and the first superconducting layer of one conductor can be used as a neutral line, and the variable component of the current may be superimposed on the first superconducting layer of at least one core. This otvetyi the power supply unit can be provided on any desired area of the veins. Similarly, when monopolar power transmission of the first superconducting layer of one core can be used as a straight line, the first superconducting layer of the other cores can be used as a return line, and another lived can be used as a backup line, and the variable component of the current may be superimposed on the first superconducting layer of at least one of the veins used as a straight line and return line. Similar comments apply to the description of figure 5 and after it.

[0068] [Second example otetsudai power supply unit]

In the above-described first example shows a configuration in which the blocks 41 short circuit connecting the second superconducting layers lived components of different lines. In addition, the blocks 41 short circuit can be connected, and otvetyi unit 3 power supply can be installed in the unit 41a connection short circuit, as shown in figure 5. As to the to and blocks 41 short circuit, unit 41a connection short circuit is separated from the first superconducting layer 20 and is not coaxially aligned, and thus, otvetyi unit 3 power supply installed in the unit 41a connection that allows you to fork and to take energy using induction from the magnetic field of the alternating current flowing through the unit 41a connection. This unit 41a connection short circuit can also be provided in the examples presented on 6 and subsequent figures.

[0069] [Third example otetsudai power supply unit]

In the first example described above illustrates a configuration in which the blocks of a short circuit connecting the second superconducting layers lived components of different lines. In the third example below, with reference to Fig.6, will be described a case in which the blocks of a short circuit is not enabled, and titulada power supply units included in the block mutual connection that connects the second superconducting layers lived comprising the same line with each other, parallel to the first superconducting layer.

[0070] the connection Block, shown in Fig.6, is the same as in the first example, in which the stepped layers exposed at the ends of a pair of superconducting cables, while the formed blocks the connection conductors and the blocks 31 of the insulating cover, and the tank 210 x what edginton and vacuum tank 220 together close fitting. The third and the first examples differ in that the second superconducting layers 40 lived 110 constituting the same line, are connected to the connection unit 42 without the use of a short circuit of the second superconducting layer 40 lived 110, the components of the different lines, and otvetyi unit 3 power supply provided in the connection unit 42. Configuration otetsudai unit 3 power supply similar to the configuration shown in the first example, and otvetyi unit 3 power supply immersed in the refrigerant, as in the first example.

[0071] Because the second superconducting layer 40 is not located coaxially with the first superconducting layer 20, otvetyi unit 3 power supply is placed in the connection unit 42, shown in this example that allows you to fork and take away electricity using induction from the magnetic field of the alternating current flowing through the block 42 of the connection.

[0072] [Fourth example otetsudai power supply unit]

Next, with reference to Fig.7 will be described a case in which titulada power supply units included in the block mutual connection with a tank of refrigerant branched for each core, and a vacuum reservoir for joint embracing plots of the branching tank with refrigerant.

[0073] In block mutual connection of superconducting cables is shown in which each of the examples from the first to the third, connection structure of a branching generated for each core 110, and three of the fitting installed in the same tank with refrigerant. In contrast, the unit of mutual connections, presented in the fourth example differs in that the reservoir 210 with the refrigerant branched for each core 110. Thus, the wiring conductors and the insulating block 31 of the coating formed on the end of each core 110, as in the first example and the second superconducting layers 40 are shorted-circuited by a block 41 of a short circuit between the cores, components of different lines. The area of separation, where the first superconducting layer 20 and the second superconducting layer 40 are not coaxially formed between the block 41 short circuit and block 31 of the insulating coating. On the other hand, the reservoir 210 with the refrigerant branched for each core forming blocks 211 branching of the refrigerant, and the block 31 of the insulating coating and the area of separation enclosed in each block 211 branching of the refrigerant. Block 211 branching refrigerant formed by using an element that can be divided into two, left and right side, almost at the midpoint. In this example, the reservoir 210 with the refrigerant is installed in the same vacuum tank 220, as in the first example. Thus, the vacuum tank 220 is not rasvet the flax and used a cylindrical vessel, which can be jointly signed blocks 211 branching refrigerant tank 210 with refrigerant.

[0074] In the connection block, shown in Fig.7, otvetyi unit 3 power supply is provided on the outer periphery of the area of separation. Configuration otetsudai unit 3 power supply similar to that used in the first example. Otvetyi unit 3 power supply may be provided on the area of separation in block 211 branching refrigerant or may be provided on the area of separation in the vacuum tank 220 outside unit 211 branching of the refrigerant. In the latter case, the wire output connected to osvetleni unit 3 power supply may not penetrate into the reservoir 210 with the refrigerant and passes only through the vacuum tank 220. Otvetyi unit 3 power supply can be installed on the outer periphery of the block 41 short circuit or can be installed on the outer periphery of the connection block which does not contain the unit short circuit, as in the third example. Otvetyi unit 3 power supply provided on this site separation to allow for the energy branch from block connection.

[0075] the [Fifth example otetsudai power supply unit]

Next, with reference to Fig will be described a case in which titulada power supply units included in the block of the mutual connection, in which not only a tank of refrigerant, but also the vacuum tank is branched for each core.

[0076] In the above-described fourth example uses the connection block, in which the reservoir 210 with refrigerant formed of blocks 211 branching refrigerant and vacuum tank 220 is not branched. In the fifth example, a vacuum tank 220 also branched for each core 110. This means that the vacuum tank 220 is formed with blocks 221 branching vacuum provided in-one correspondence with the blocks 211 branching refrigerant that provides the ability to individually close the blocks 211 branching refrigerant tank 210 with the refrigerant. As the block 211 branching refrigerant unit 221 branching vacuum formed using an element that can be divided into two, left and right side, almost at the midpoint. Block configuration of interconnection at the same time similar configuration in accordance with the third example described above, except that the vacuum tank 220 also branched for each core 110, and the insulating block 31 of the cover and the area of separation enclosed in each block 211 branching refrigerant.

[0077] In block interconnection shown in Fig, it is possible to provide otvetyi unit 3 power supply not only the Ko on the area of separation within a block 211 branching refrigerant or on the area of separation within a block 221 branching vacuum outside unit 211 branching refrigerant, but also on the area of separation on the outside of the block 221 branching vacuum. To install otetsudai power supply unit on the area of separation on the outside of the block 211 branching vacuum wire output connected to osvetleni unit 3 power supply may not penetrate into the reservoir 210 with the refrigerant or in a vacuum tank 220. Otvetyi unit 3 power supply can be installed on the outer periphery of the block 41 short circuit or can be installed on the outer periphery of the connection block, which is provided without the use of any unit short circuit, as in the third example. Otvetyi unit 3 power supply provided on this site separation, causing the main power can be extracted from the connection block, as in the examples from the first to the third.

[0078] [Sixth example otetsudai power supply unit]

In the first to fifth examples of the above has been described a configuration in which titulada power supply units included in the block interconnection superconducting cable, and selected branch power. In the sixth example, with reference to figure 9 will be described a configuration in which main power is taken from block interconnection-core superconducting cable. Single-core superconducting cable has a configuration inwhich veins above three-core superconducting cable become one living. There is one thread of such a single-core superconducting cable (two threads, if you do not include a second superconducting layer), which may be constructed monopolar line power transmission. When using two threads such single-core superconducting cables (three threads, if not contains the second superconducting layer)may be constructed of a bipolar line power transmission. In this example, will be described a case where a bipolar transmission line energy built using a single thread single-core superconducting cable having the second superconducting layer. Thus, each single-core superconducting cable of the first superconducting layer is used as a straight line, and the second superconducting layer is used as a return line.

[0079] In this example, two single-core superconducting cable 300 are installed in parallel, and each cable 300 is formed with a block 250 discrete connection. In block 250 discrete compounds formed wiring conductors, as in the first example, at the end of the superconducting cable 300, and the block 31 of the insulating coating is provided on the power connection conductors. Block 250 discrete connection is installed in the tank 210 with the refrigerant and immersed in a refrigerant such as liquid nitrogen, etc. Vacuum tank 220 covers EXT is šnē side of the tank 210 with the refrigerant for heat insulation.

[0080] In this example, the block 41 short circuit, designed to short circuit the second superconducting layer 40 superconducting cables 300 formed between adjacent blocks 250 discrete connection. In this example, the block 41 short circuit formed on each of right and left parts of the block 31 of the insulating coating; the second superconducting layers 40 adjacent blocks 250 discrete connections established on the right block 31 of the insulating cover and connected with the block 41 short circuit for forming a closed circuit, and similarly the second superconducting layers 40 adjacent blocks 250 discrete connections located to the left of the block 31 of the insulating cover and connected with the block 41 short circuit, for forming a closed circuit. Blocks 41 short circuit closed by blocks 212 connection of the refrigerant and blocks 222 connection vacuum connection for the adjacent tank 210 with the refrigerant and the adjacent vacuum tank 220, and immersed in a refrigerant such as liquid nitrogen, etc.

[0081] When used as the site of the separation unit 41 short circuit otvetyi unit 3 power supply is provided on the outer periphery of the block 41 short circuit. More specifically, you can use the place of installation within the tank 210 with the refrigerant, in block 41 to the short circuit, within a block 222 connection vacuum, outside from block 212 connection of the refrigerant in the block 41 short circuit and the outside unit 222 connection vacuum in the block 41 short circuit. As another area of separation, you can use the area between the block 31 and the insulating cover and the block 41 short circuit in the tank 210 with the refrigerant, in addition to block 212 connection refrigerant pipe between the block 31 and the insulating cover and the block 41 short circuit outside the vacuum tank 220, which is not a unit 222 connection vacuum unit 41a connection short circuit, if a block 41a connection, short circuit, or the like. As shown in this example, main power, you can also take away from the power connection of superconducting cables 300.

[0082] [Seventh example otetsudai power supply unit]

In the examples from the first to the sixth was described configuration selection branch power in the superconducting cable. In the seventh example with reference to figure 10 will be presented configuration selection main power of the unit interconnection usual electrical cables. Conventional electrically conductive cable 60 includes a casing 61 on the outer periphery of the cable core having a conductor electrically insulating layer and layer-electrode installed coaxial is in this order from the center. As the structure of the mutual connection, which is designed for connection of cables 60, layer electrode and electrically insulating layer sequentially exposed at each end of the conductor 61 to expose the conductor, the conductors are connected to each other using a connection element in the form of the coupling and so on, the auxiliary insulating layer is provided so that it covers part of the connection conductors at the ends of the successively exposed layers, and connecting the casing 62 is installed on the outer periphery of the auxiliary insulating layer. Connecting the casing 62 is formed by combining separate parts that can be separated in the direction of the length, and the block 64 articulation split parts formed of an insulating material. The shell 61 of the cable 60 is electrically connected with the connecting casing 62. Then separated parts of the connecting casing 62 are connected by a connecting line 63, and otvetyi unit 3 power supply installed on the connecting line 63, as shown in figure 10(A). The connector 63 is a plot branching, located not coaxial with the conductor, and the energy can be extracted using otetsudai unit 3 power supply. Alternatively, otvetyi unit 3 power supply can be located on the outer lane the outskirts of block 64 of articulation, as shown in figure 10(B). In block 64, the junction layer electrode 61 and the connecting casing 62, electrically connected to the layer-electrode 61, no external periphery of the conductor, which allows you to select electricity using otetsudai unit 3 power supply.

[0083] Although the invention has been described in detail with reference to particular embodiments, for specialists in the art it will be obvious that it can be made various changes and modifications without departing from the essence and scope of the invention.

This application is based on application of Japanese patent No. 2004-349164), filed December 1, 2004, which is incorporated here by reference.

Industrial applicability

[0084] the Power cable line according to the invention can be used to supply power and allows you to select advanced imposed a component of variable power to electricity-consuming devices that are designed for this line, although it is a line of power transmission DC.

1. Power cable line, characterized by:
power cable for the transmission and distribution DC;
block overlay AC overlay the variable component of the current on said power cable; and
osvetleni BL is kOhm power for PTO, induced imposed by the variable component of the current of the said cable.

2. Power cable line according to claim 1, characterized in that the said power cable is a superconducting cable.

3. Power cable line according to claim 2, characterized in that the superconducting cable has a first superconducting layer and the second superconducting layer, located coaxially through the electrically insulating layer provided on the outer periphery of the first superconducting layer, and the above-mentioned otvetyi the power supply unit is provided on the area of separation, where the first superconducting layer and the second superconducting layer are not coaxial in block cable connections.

4. Power cable line according to any one of claims 1 to 3, characterized in that it contains a filter that is installed near the load using the power transferred through this line to reduce the flow imposed by the variable component of the current to the load.



 

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