JP2002075082A - Superconducting system for electric energy transmission and transformation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overhaul or repair a superconducting equipment, and the like, without need for elevating the temperature of the whole system. SOLUTION: A superconducting system for electric energy transmission and transformation consisting of either a superconducting equipment or a superconducting cable and an insulating pipe line connected thereto; the insulating pipe line comprises a cryogenic insulated pipe 1 which is provided with a first conductor 4 in its inside and supports the conductor 4 and whose both ends are shielded with the first adiabatic insulating spacers 3, and a vacuum insulating pipe 2 which is provided with a second conductor 6 to be connected to the first conductor 4 in its inside and supports the conductor 6 and whose both ends are shielded with the second adiabatic insulating spacers 3 inclusive of the first insulating spacer 3; the cryogenic insulating pipe 1 is provided with an open/close port 5 for the coolant to be injected into and ejected from the pipe inside, and the vacuum pipe 2 is provided with a vacuum port 7 for evacuating the pipe inside to be in a vacuum state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting power transmission and transformation system using superconducting equipment including cryogenic equipment and a superconducting cable.

[0002]

2. Description of the Related Art In recent years, superconducting technology has been applied in many industrial fields. By introducing this technology to power system equipment, the efficiency and size of the equipment have been improved.
It is expected that high performance of the characteristics will be achieved and that it will greatly contribute to the stable supply of electric power.

[0003] Therefore, as examples of application to power equipment, superconducting generators, cryogenic circuit breakers, superconducting transformers, superconducting cables, and the like have been developed. On the other hand, in parallel with this development, these apparatuses have been developed. A study on how to build a transmission and substation system that uses GIS is also underway.

[0004] At present, there is a gas insulated transmission and transformation system among existing systems. Based on the configuration of the gas insulated transmission and transformation system, a transmission and transformation system that has been conventionally considered will be described.

FIG. 8 is a diagram showing a configuration of a power transmission and transformation system using superconducting equipment.

[0006] The power transmission and transformation system includes a superconducting transformer 4
1. A configuration in which a cryogenic circuit breaker 42, a superconducting current limiter 43, and a superconducting cable 44 are combined, and these devices are connected using a cryogenic insulating tube 45. Here, the cryogenic insulating tube 45 for connecting to the superconducting device has not been established yet, but application of the insulating tube used in the current power transmission and transformation system using the gas insulating device is considered.

FIG. 9 is a cross-sectional view of a plurality of cryogenic insulating tubes 45 constructed based on the prior art.

The cryogenic insulation tube 45 forms a conduit, and a conductor 46 made of aluminum or copper is provided along a central axis of the conduit, and a conductor 46 is formed in a direction perpendicular to the central axis of the conduit. And a plurality of insulating spacers 47 provided at intervals of. The insulating spacer supports and fixes the conductor 46 at the center thereof, and also serves to insulate and separate the space before and after the insulating spacer.
Further, a coolant 48 such as liquid nitrogen is
Is filled to prevent a decrease in performance of each superconducting device including the conductor 46 due to a rise in temperature.

[0009]

However, the following problems have been pointed out in the above-mentioned transmission and substation system.

The first problem is that the power transmission and transformation system is disassembled and repaired and inspected for maintenance and the like. At this time, since the entire power transmission and transformation system is connected by a conductor having good heat conduction, the temperature of a part of the equipment due to opening is reduced. As the temperature rises, the temperature immediately rises to other equipment parts. It is not preferable that the devices have an unbalanced distribution in temperature, so that at the time of maintenance, not only the device to be maintained but also the entire system including other devices rises in temperature, requiring a long maintenance time. There's a problem.

[0011] The second problem is that, when the equipment constituting the system is a mixture of superconducting equipment and room-temperature equipment,
That is, the cryogenic insulating tube 45 cannot be used. This is because, in order to use a room-temperature device incorporated in a cryogenic environment, it is necessary to perform a heat-insulating treatment so that the room-temperature device is not affected by the cryogenic temperature. This is because a sufficient low-temperature environment cannot be ensured due to the influence of the device, and the original efficiency cannot be exhibited.

In order to solve these problems, it is necessary to suppress the transfer of heat between devices used in systematizing superconducting devices.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a superconducting transmission and substation system in which a part is disassembled and inspected or repaired without requiring the entire system to be heated.

Another object of the present invention is to provide a superconducting power transmission and transformation system which enables a system configuration in which superconducting equipment and room temperature equipment are combined.

[0015]

According to the present invention, there is provided a superconducting transmission / transformation system comprising a superconducting device or a superconducting cable and an insulated conduit connected thereto, wherein the insulated conduit has a first conductor therein. And a cryogenic insulating tube that supports the conductor and is shielded at both ends by a first insulating spacer having heat insulation, and a part or all of the inside of which is connected to the first conductor. A ceramic-based superconducting second conductor is provided, and a vacuum supporting both the second conductor and being shielded by a second insulating spacer including the first insulating spacer having heat insulating properties at both ends of the tube. An insulating pipe, wherein the cryogenic insulating pipe is provided with an opening / closing port for injecting / extracting a refrigerant into the pipe, and the vacuum insulating pipe is provided with a vacuum port for evacuating the pipe to a vacuum state. .

According to the present invention, in a superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulating conduit connected thereto, the insulating conduit has a first conductor disposed therein. A first cryogenic insulating tube that supports a conductor and is shielded at both ends by a first insulating spacer having heat insulating properties; and that a part or all of the inside connected to the first conductor is made of a ceramic material. A second pole provided with a superconducting second conductor and supporting the second conductor and having both ends of the tube shielded by a second insulating spacer including the first insulating spacer having thermal insulation. And a low-temperature insulating pipe, wherein each of the cryogenic insulating pipes is provided with an opening for injecting and extracting a refrigerant into the pipe.

The present invention also relates to a superconducting transmission / transformation system comprising a superconducting device or a superconducting cable and an insulating conduit connected thereto, in which a conductor is disposed inside, the conductor is supported, and both ends of the tube are supported. A cryogenic insulating pipe, which is the insulating pipe whose section is shielded by an insulating spacer having heat insulating properties, and connected to one end or both ends of the cryogenic insulating pipe via the insulating spacer to electrically connect the conductor with the conductor. And the superconducting device or the superconducting cable, which is electrically connected, and injects a refrigerant into the cryogenic insulating tube.
This is a configuration provided with an opening / closing port for extraction.

The present invention also provides a superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulating conduit connected thereto, wherein a ceramic-based superconducting conductor is disposed partially or entirely inside. A vacuum insulating tube which is the insulating conduit which supports this conductor and is shielded at both ends by insulating spacers having heat insulating properties;
One end or both ends of the vacuum insulating tube is connected via the insulating spacer, and has the superconducting device or the superconducting cable electrically connected to the conductor. This is a configuration in which a vacuum port for pulling a vacuum is provided.

Further, the present invention relates to the superconducting power transmission and transformation system according to the present invention, wherein a conductor derived from the superconducting device or the superconducting cable is disposed inside as a part of the superconducting device or the superconducting cable. When a cryogenic insulating tube is provided, this cryogenic insulating tube is provided with an opening and closing port for injecting and extracting a refrigerant into the tube, and as a part of the superconducting device or the superconducting cable,
When a vacuum insulating tube provided with a conductor derived from the superconducting device or the superconducting cable is provided, a part or all of the conductor disposed inside the vacuum insulating tube is made of ceramics superconducting. The vacuum insulating tube is formed of a conductor, and the vacuum insulating tube is provided with a vacuum port for evacuating the inside to make a vacuum state.

Further, the present invention provides the pre-superconducting power transmission and transformation system according to the above invention, wherein at least the cryogenic insulating tube of the cryogenic insulating tube and the vacuum insulating tube has a body portion made of a heat insulating material. Is what it is.

Further, the present invention provides the pre-superconducting power transmission / transformation system according to the above invention, wherein the ceramic-based superconductor is branched from the normal-temperature conductor when the conductor in the vacuum insulating tube is disposed with the normal-temperature conductor interposed therebetween. In this configuration, a branch normal temperature conductor for connecting to a normal temperature device is provided.

Further, in the pre-superconducting power transmission and transformation system according to the present invention, the insulating spacer has a volume content of 50% to 100% of the polymer material.

Further, the present invention provides the pre-superconducting power transmission and transformation system according to the above-mentioned invention, wherein the vacuum insulating tube is replaced with a vapor gas recovery tank for refrigerant in the superconducting equipment or the superconducting cable.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a superconducting power transmission and transformation system according to the present invention.

In this power transmission and transformation system, a cryogenic insulating tube 1 and a vacuum insulating tube 2 are alternately connected, and both ends of each of the insulating tubes 1 and 2 are separated by insulating spacers 3 having high thermal insulation. Both ends of a conductor 4 disposed along the central axis are supported by insulating spacers 3 on the cryogenic insulating tube 1, and both ends of a conductor 6 disposed along the central axis of the vacuum insulating tube 2 are also insulated. Are supported by the spacers 3, and the conductors 6 are communicated with each other over the insulating tubes 1, 2,... And, if necessary, are independently connected to each of the insulating tubes 1, 2 and electrically connected at the center of the insulating spacer 3. I have.

Further, an opening / closing port 5 communicating with the inside of the cryogenic insulating tube 1 is provided at the upper part of the cryogenic insulating tube 1,
The inside of the cryogenic insulating tube 1 is filled with a refrigerant 8 such as liquid nitrogen through the opening 5. In addition, vacuum insulation tube 2
A vacuum port 7 communicating with the inside of the vacuum insulating tube 2
Is provided, and the inside of the insulating tube 2 is formed in the vacuum section 10 by evacuating from the vacuum port 7.

Here, the body 9 of the cryogenic insulation tube 1 is formed of a material having heat insulation performance or a structure having heat insulation performance, and the conductor 4 inside the tube is a normal conductor made of aluminum or copper. Is formed. On the other hand, the material or structure of the body 11 of the vacuum insulating tube 2 does not have a heat insulating property, and the conductor 6 disposed inside is insulated from the normal conductor 6a made of aluminum or copper. It is formed of a combination of high ceramic superconductors 6b or only ceramic superconductor 6b.

In the above system, for example, when the refrigerant 8 is extracted from the opening / closing port 5 provided for performing maintenance in the cryogenic insulating tube 1, the temperature of the cryogenic insulating tube 1 rises. And the ceramic superconductor 6b suppresses heat conduction in the pipe direction, so that the cryogenic insulating tube 1
Only the portion can be heated.

In the above embodiment, the cryogenic insulating tube 1 is used.
Although the description has been made on the point that the body 9 of the vacuum insulating tube 2 is formed of a material having heat insulation performance, the body of the vacuum insulating tube 2 may be formed of a material having heat insulation performance or a structure having heat insulation performance. Since the heat transfer between the inside of the vacuum insulating tube 2 and the atmosphere is suppressed, the influence on other superconducting devices can be further reduced.

Further, as shown in FIG. 2, for example, when a superconducting device (hereinafter referred to as a device to be maintained) 15 is adjacent to the cryogenic insulating tube 1, the following configuration is provided.

The equipment 15 to be maintained is connected to the cryogenic insulation pipe 1 with a common central axis, and the equipment 15 to be maintained and the cryogenic insulation pipe 1 are connected by the insulating spacer 3 in the same manner as between the insulation pipes 1 and 2. It is partitioned. Further, a conductor 14 is led out to the maintenance target device 15, and an end of the conductor 14 is supported by the insulating spacer 3 and is electrically connected to the conductor 4 of the cryogenic insulating tube 1.

In such a state, when the inside of the maintenance target device 15 is opened for maintenance, the conductor 14 is connected to the conductor 4 of the cryogenic insulating tube 1 and may cause dew condensation. Therefore, when the refrigerant 8 is extracted from the opening 5 of the cryogenic insulating tube 1, the temperature of the equipment 15 to be maintained, the conductor 14, the cryogenic insulating tube 1, and the conductor 4 are increased. The function of the tube 2 does not affect other superconducting devices (not shown).

First, transmission of the temperature of the cryogenic insulating tube 1 to the vacuum insulating tube 2 is suppressed by the presence of the insulating spacer 3. Further, the heat of the conductor 4 is transmitted to the normal conductor 6a, but the heat transfer in the pipe direction is suppressed by the ceramic superconductor 6b. Also, since the inside of the vacuum insulating tube 2 is evacuated,
Convection does not occur, and heat is transmitted from the normal conductor 6a to the vacuum insulating tube 2 by radiation.
Is covered with a heat insulating material, or the effect of heat transfer can be reduced by taking measures such as making the portion of the normal conductor 6a constituting the conductor 6 smaller. As a result, only the cryogenic insulating tube 1 rises in temperature, The occurrence of dew condensation can be prevented.

In the case of re-cooling after maintenance,
Conversely to the above-described procedure, the refrigerant 8
In this case, the maintenance target device 15 and the cryogenic insulation tube 1 are simultaneously cooled or the maintenance target device 1 is cooled so that the conductor 14 does not cause condensation.
Cooling may be performed while filling the inside of 5 with a dry gas.

At the time of recooling, the temperature of the conductor 4 does not affect other superconducting equipment (not shown) due to the function of the vacuum insulating tube 2 described above.

The insulating spacer 3 is made of a material having a low thermal conductivity, such as a resin or a reinforcing fiber, and has a volume content of 50% or more. As a result, the heat insulating performance of the insulating spacer 3 is improved, so that heat transfer from the other insulating pipes 1 can be suppressed, and the temperature of the superconducting device, which is a maintenance target device constituting the superconducting power transmission and transformation system, can be increased.

FIG. 3 is a block diagram showing another embodiment of the superconducting power transmission and transformation system according to the present invention. In this figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this transmission and substation system, a cryogenic circuit breaker 19 is arranged at one end of the cryogenic insulating tube 1 and a superconducting current limiter 20 is arranged at the other end. And between the cryogenic insulating tube 1 and the superconducting current limiter 20 are each separated by an insulating spacer 3.

A part of the cryogenic circuit breaker 19 is a vacuum insulating chamber 21 in a vacuum state. Inside the vacuum insulating chamber 21, a conductor 22 led out of a current limiter 20 extends along a central axis. It is disposed, and its end is also supported by the insulating spacer 3 and connected to the conductor 4 of the cryogenic insulating tube 1.

A part of the superconducting current limiter 20 is also a vacuum insulating chamber 23 in a vacuum state. Inside the vacuum insulating chamber 23, a conductor 24 derived from the current limiter 20 extends along the center axis. The end is also supported by the insulating spacer 3 and is connected to the conductor 4 of the cryogenic insulating tube 1. Here, the conductor 2 disposed inside the superconducting current limiter 20
4 is a normal conductor 24 made of aluminum or copper
a and the ceramic superconductor 24b having high thermal insulation, or the ceramic superconductor 24b alone.

Next, an example in which the cryogenic circuit breaker 19 is maintained in the above system will be described.

When the cryogenic circuit breaker 19 is opened for maintenance, dew condensation occurs because the conductor 22 is connected to the conductor 4. Therefore, if the operation is performed so as to extract the refrigerant 8 from the opening / closing port 5 of the cryogenic insulation pipe 1 in conjunction with the temperature rise due to the opening of the cryogenic circuit breaker 19, it is possible to prevent the dew condensation of the cryogenic circuit breaker 19 from occurring. .

At this time, the cryogenic circuit breaker 19, the conductor 22,
The temperature of the cryogenic insulating tube 1 and the conductor 4 is increased, but the effect of this heat is suppressed by the superconducting current limiter 20 and does not affect other superconducting devices not shown. That is, the transmission of the temperature of the cryogenic insulating tube 1 to the superconducting current limiter 20 is suppressed by the presence of the insulating spacer 3. Further, the heat of the conductor 4 is transmitted to the normal conductor 24a, but heat transfer in the pipe direction is suppressed by the ceramic superconductor 24b. Further, since the inside of the superconducting current limiter 20 is in a vacuum, convection heat transfer does not occur. Superconducting current limiter 2 from normal conductor 24a by radiation
There is a heat transfer to the superconducting current limiter 20 with a heat insulating material, or a heat transfer by reducing the portion of the normal conductor 24a constituting the conductor 24. Can be reduced.

In the re-cooling after the maintenance, the refrigerant 8 is injected from the opening / closing port 5 of the cryogenic insulating tube 1 in the reverse order of the above-mentioned procedure. 19 and cooling of the cryogenic insulation tube 1 at the same time,
Alternatively, the cooling may be performed while filling the inside of the cryogenic circuit breaker 19 with the dry gas.

During the recooling, the temperature of the conductor 4 does not affect other superconducting devices (not shown) due to the operation of the superconducting current limiter 20 described above.

FIG. 4 is a block diagram showing still another embodiment of the superconducting power transmission and transformation system according to the present invention. In this figure, the same parts as those in FIGS.
The detailed description is omitted.

This power transmission and transformation system comprises a superconducting current limiter 25 at one end of a vacuum insulating tube 2 and a superconducting cable 2 at the other end.
6 are arranged, and the space between the superconducting current limiter 25 and the vacuum insulating tube 2 and between the vacuum insulating tube 2 and the superconducting cable 26 are separated by insulating spacers 3.

A part of the superconducting current limiter 25 is a cryogenic insulation chamber 27 filled with the refrigerant 8, and an opening / closing port 5 for injecting or extracting the refrigerant 8 is provided at an upper portion thereof. ing. A conductor 28 extending from the current limiter 25 is disposed inside the cryogenic insulation chamber 27 along the center axis, and its end is supported by the insulating spacer 3. Is electrically connected to the normal conductor 6a which is a part of

Further, a part of the superconducting cable 26 is
Is formed, and an opening / closing port 5 for injecting or extracting the refrigerant 8 is provided at an upper portion thereof. In the cryogenic insulation chamber 29, the end of the conductor 30 along the center axis is supported by the insulation spacer 3, and the normal conductor 6 which is a part of the conductor 6 of the vacuum insulation tube 2 is provided.
a.

As described above, the conductor 6 disposed inside the vacuum insulating tube 2 is composed of a combination of a normal conductor 6a made of aluminum or copper and a ceramic superconductor 6b having high thermal insulation. Alternatively, it is formed of only the ceramic superconductor 6b.

An example in which the superconducting current limiter 25 is maintained in such a system will be described.

The temperature of the superconducting current limiter 25 and the conductor 28 can be increased by extracting the refrigerant 8 from the opening 5 of the cryogenic insulation chamber 27. The function of 2 does not affect the superconducting cable 26. That is, the heat of the conductor 28 is transmitted to the normal conductor 6a, but the heat transfer in the pipe direction is suppressed by the ceramic superconductor 6b. Further, since the inside of the vacuum insulating tube 2 is evacuated, convection heat transfer does not occur. There is heat transfer from the normal conductor 6a to the vacuum insulating tube 2 by radiation, but this is suppressed by the action of the insulating spacer 3 from conducting heat to the superconducting cable 26. Further, the effect of the heat transfer can be reduced by taking measures such as covering the vacuum insulating tube 2 with a heat insulating material or reducing the portion of the normal conductor 6a constituting the conductor 6, for example. It is.

In the re-cooling after the maintenance, the refrigerant 8 is injected from the opening / closing port 5 of the cryogenic insulation chamber 27 in the reverse order to the above-mentioned procedure. The superconducting cable 2
6 is not affected.

Similarly, when the refrigerant 8 is extracted from the opening 5 of the cryogenic insulation chamber 29, the temperature of only the superconducting cable 26 can be increased. The superconducting current limiter 25 is not affected.

FIG. 5 is a block diagram showing still another embodiment of the superconducting power transmission and distribution system according to the present invention.

In this embodiment, only the main parts will be described.

In this embodiment, the superconducting current limiter 20 shown in FIG. 3 and the superconducting cable 26 shown in FIG.

In the device configured as described above, the temperature of the superconducting cable 26 can be raised by extracting the refrigerant 8 from the opening 5 of the cryogenic insulation chamber 29. Heat conduction is suppressed by the effects of the spacer 3, the vacuum insulating chamber 23, and the ceramic superconductor 24b, so that the main body of the superconducting current limiter 20 is not affected.

FIG. 6 is a block diagram showing still another embodiment of the superconducting power transmission and transformation system according to the present invention.

In this embodiment, only the main parts will be described.

This embodiment has a structure in which the vacuum insulating tube 2 shown in FIG.

The bushing 31 has an opening provided at the upper part of the peripheral surface of the vacuum insulating tube 2, and a cylindrical body having one end closed is vertically connected with its opening end face down, and the inside thereof is a vacuum part 32. It has become. The superconducting current limiter 2 is connected to the vacuum section 32 so as to connect the conductor 28 and the conductor 30.
A conductor 33 is arranged along the central axis of the superconducting cable 5 and the superconducting cable 26, and both ends thereof are supported and fixed by the insulating spacer 3. Further, a central conductor 33b of the bushing 31 extending in a direction perpendicular to the central axis is connected to the conductor 33 in a T-shape.

The conductor 33 has a structure in which a normal conductor 33a and a ceramic superconductor 33c are combined in the form shown in FIG. 6, and the center conductor 33b is formed of a normal conductor.

In the superconducting power transmission and transformation system configured as described above, the temperature of the superconducting current limiter 25 can be raised by extracting the refrigerant 8 from the opening / closing port 5 of the ultra-low temperature insulating chamber 27, as described above. Since the heat conduction is suppressed by the effects of the insulating spacer 3, the vacuum portion 32, and the ceramic superconductor 33c, the temperature of the superconducting cable 26
Has no effect. Similarly, when the refrigerant 8 is extracted from the cryogenic insulation chamber 29, only the superconducting cable 26 can be heated.

With this configuration, it is possible to construct a power transmission and transformation system by combining a bushing, which is a room temperature device, with a superconducting device.

FIG. 7 is a configuration diagram showing still another embodiment of the superconducting power transmission and transformation system according to the present invention.

In this embodiment, only the main parts will be described.

This embodiment is an example in which an insulating spacer 3 is fixedly installed on a vacuum insulating tube 2 in the insulating conduit shown in FIG. With such a configuration, the cryogenic insulating tube 1 connected thereto can be removed while the vacuum insulating tube 2 is kept in a vacuum, so that the superconducting power transmission and transformation system can be separated.

The present invention is not limited to the above embodiment, but can be implemented in various modifications. For example, the vacuum insulating tube 2 incorporated in the system may be used as a substitute for a tank for recovering evaporative gas of a refrigerant used in a superconducting device or a superconducting cable.

With this configuration, there is no need to separately provide an evaporative gas recovery tank, so that a compact superconducting transmission and substation system that holds high-purity evaporative gas can be constructed.

Further, a superconducting current limiting system may be combined with a superconducting device or a superconducting cable to constitute a superconducting power transmission and transformation system.

This superconducting current limiter has a vacuum insulating chamber 23 shown in FIG. 3 or a cryogenic insulating chamber 2 shown in FIG.
7 can be configured, so that a system can be constructed by flexibly combining with other devices.

With this configuration, not only the temperature of a part of the superconducting system can be easily raised, but also the short circuit current of the superconducting cable can be suppressed.

[0074]

As described above, according to the present invention, the transfer of heat between superconducting devices or superconducting cable devices can be effectively suppressed, so that some superconducting devices can be used without raising the temperature of the entire system. Only the temperature can be raised, and maintenance efficiency can be improved.

Further, since a system can be configured by combining a normal temperature device and a superconducting device, a flexible system can be constructed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a superconducting power transmission and transformation system according to the present invention.

FIG. 2 is a cross-sectional view of a system illustrating a maintenance example.

FIG. 3 is a sectional view showing another embodiment of the superconducting power transmission and transformation system according to the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the superconducting power transmission and transformation system according to the present invention.

FIG. 5 is a sectional view showing still another embodiment of the superconducting power transmission and transformation system according to the present invention.

FIG. 6 is a sectional view showing still another embodiment of the superconducting power transmission and transformation system according to the present invention.

FIG. 7 is a sectional view showing still another embodiment of the superconducting power transmission and transformation system according to the present invention.

FIG. 8 is a system configuration diagram illustrating a conventional superconducting transmission and transformation system.

FIG. 9 is a sectional view of a cryogenic insulating tube used in a conventional superconducting power transmission and transformation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cryogenic insulating tube 2 ... Vacuum insulating tube 3 ... Insulating spacer 4 ... Conductor 5 ... Opening / closing opening 6 ... Conductor 6a ... Normal conductor 6b ... Ceramic superconductor 7 ... Vacuum opening 8 ... Refrigerant 14 ... Conductor 15 ... Maintenance target Equipment 19 ... Cryogenic circuit breaker 20 ... Superconducting current limiter 21 ... Vacuum insulation chamber 22 ... Conductor 24 ... Conductor 24a ... Normal conductor 24b ... Ceramic superconductor 25 ... Superconducting current limiter 26 ... Superconducting cable 28 ... Conductor 29 ... Cryogenic insulation room 30 ... Conductor 31 ... Bushing 32 ... Vacuum part 33 ... Conductor 33a ... Normal conductor 33b ... Normal conductor 33c ... Ceramic superconductor

Continued on the front page (72) Inventor Eriko Yoneda 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Works Co., Ltd. (72) Inventor Shunto 1-1-1 Shibaura, Minato-ku, Tokyo F-term in Toshiba head office (reference) 5G321 BA01 CB02 CB08

Claims (9)

[Claims] 1. A superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulated conduit connected thereto, wherein the insulated conduit has a first conductor disposed therein. A cryogenic insulating tube which is supported and both ends of which are shielded by a first insulating spacer having heat insulating properties; and a part or all of which is connected to the first conductor inside or a second part made of ceramics superconducting. A vacuum insulating tube provided with a conductor, supporting the second conductor, and both ends of the tube are shielded by a second insulating spacer including the first insulating spacer having heat insulation; A superconducting transmission and substation system, characterized in that a cryogenic insulating tube is provided with an opening / closing port for injecting / extracting a refrigerant into the tube, and the vacuum insulating tube is provided with a vacuum port for evacuating the tube to a vacuum state. 2. A superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulated conduit connected thereto, wherein the insulated conduit has a first conductor disposed therein. A first cryogenic insulating tube which is supported and both ends of which are shielded by a first insulating spacer having heat insulating properties; and a part or all of which is connected to the first conductor inside is made of ceramics superconducting. A second cryogenic insulation is provided in which a second conductor is provided and both ends of which are supported by the second conductor and are shielded by a second insulation spacer including the first insulation spacer having heat insulation. A superconducting transmission / transformation system, characterized in that each of the cryogenic insulating tubes has an opening for injecting and extracting a refrigerant into the tubes. 3. A superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulated conduit connected thereto, wherein a conductor is disposed inside, and the conductor is supported and both ends of the tube are insulated. A cryogenic insulating pipe, which is the insulating pipe line shielded by the insulating spacer having the cryogenic insulating pipe, connected to one end or both ends of the cryogenic insulating pipe via the insulating spacer, and electrically connected to the conductor. A superconducting transmission and substation system comprising: the superconducting device or the superconducting cable described above; and an opening for injecting and extracting a refrigerant into and from the cryogenic insulating tube. 4. A superconducting power transmission and transformation system comprising a superconducting device or a superconducting cable and an insulating conduit connected thereto, wherein a ceramic-based superconducting conductor is partially or entirely disposed inside. A vacuum insulating pipe which is the insulating pipe line which is supported and both ends of which are shielded by insulating spacers having heat insulating properties, and which is connected to one or both ends of the vacuum insulating pipe via the insulating spacer, A superconducting transmission / transformation system comprising: the superconducting device or the superconducting cable electrically connected to a conductor; and a vacuum port provided in the vacuum insulating tube to evacuate the inside of the tube to a vacuum state. 5. The superconducting power transmission and transformation system according to claim 1, wherein: As a part of the superconducting device or the superconducting cable, when a cryogenic insulating tube in which a conductor derived from the superconducting device or the superconducting cable is disposed is provided, the cryogenic insulating tube is provided in the pipe. A case in which an opening / closing port for injecting / extracting a refrigerant is provided, and a vacuum insulating tube provided with a conductor derived from the superconducting device or the superconducting cable is provided as a part of the superconducting device or the superconducting cable. The conductor provided inside the vacuum insulating tube is partially or entirely made of a ceramic-based superconducting conductor, and the vacuum insulating tube is provided with a vacuum port for evacuating the inside to make a vacuum state. A superconducting transmission and substation system characterized by the following. 6. The cryogenic insulating tube of claim 1, wherein at least the cryogenic insulating tube of the cryogenic insulating tube and the vacuum insulating tube has a body made of a heat insulating material. A superconducting power transmission and transformation system according to any one of the preceding claims. 7. When the ceramic-based superconductor is provided with a conductor inside the vacuum insulating tube sandwiching a room-temperature conductor, a branch room-temperature conductor for branching from the room-temperature conductor and connecting to a room-temperature device is provided. Claims 1, 4 to
7. The superconducting power transmission and transformation system according to any one of 6. 8. The insulating spacer is made of a 50% polymer material.
The superconducting transmission substation system according to any one of claims 1 to 5, having a volume content of 100% or less as described above. 9. The superconducting power transmission and transformation system according to claim 1, wherein a steam vapor recovery tank for refrigerant in the superconducting device or the superconducting cable is used instead of the vacuum insulating tube. A superconducting transmission substation system characterized by the above.