IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0549578
(2004-09-09)
|
등록번호 |
US-7614243
(2009-11-23)
|
우선권정보 |
JP-2003-328780(2003-09-19) |
국제출원번호 |
PCT/JP04/013120
(2004-09-09)
|
§371/§102 date |
20050919
(20050919)
|
국제공개번호 |
WO05/029510
(2005-03-31)
|
발명자
/ 주소 |
- Masuda, Takato
- Yumura, Hiroyasu
|
출원인 / 주소 |
- Sumitomo Electric Industries, Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
11 |
초록
▼
A method of operating a superconducting cable using a conductor cooled by a refrigerant to transmit electric power causes a change in the refrigerant temperature to change the transmission capacity of a superconducting cable(110, 120, 130). Since superconducting materials are capable of increasing t
A method of operating a superconducting cable using a conductor cooled by a refrigerant to transmit electric power causes a change in the refrigerant temperature to change the transmission capacity of a superconducting cable(110, 120, 130). Since superconducting materials are capable of increasing the value of their critical current as the temperature decreases, the refrigerant temperature may be changed to change the transmission capacity of the superconducting cable (110, 120, 130) without overdesigning of cabling or an additional cable.
대표청구항
▼
The invention claimed is: 1. A method of operating a superconducting cable for transmitting electric power using a superconducting cable of a first and second circuits comprising: cooling said superconducting cable of said first and said second circuits with a refrigerant, each of said first and se
The invention claimed is: 1. A method of operating a superconducting cable for transmitting electric power using a superconducting cable of a first and second circuits comprising: cooling said superconducting cable of said first and said second circuits with a refrigerant, each of said first and second circuits having a respective refrigerator arranged in a refrigerant flow path on an upstream side of both of said superconducting cables of said first and second circuits, said flow path of said first and second circuits being connected to each other on the upstream side of said refrigerators, and said flow path of said first and second circuits being connected to each other on an downstream side of said superconducting cable; and controlling the cooling by cooling said superconducting cable of said second circuit with refrigerant cooled by both of the refrigerators for said first and said second circuits. 2. The method of operating a superconducting cable according to claim 1, characterized in that when a power demand from a load connected with the superconducting cable increases, the refrigerant temperature is reduced to increase the transmission capacity of the superconducting cable to transmit electric power matching the power demand. 3. The method of operating a superconducting cable according to claim 1, characterized in that when a power demand from a load connected with the superconducting cable decreases, the refrigerant temperature is increased to decrease the transmission capacity of the superconducting cable to transmit electric power matching the power demand. 4. The method of operating a superconducting cable according to claim 1, characterized in that when one of the circuits fails, the refrigerant temperature of the good circuit is reduced below the temperature prior to the failure to increase the transmission capacity of the good circuit. 5. The method of operating a superconducting cable according to claim 4, characterized in that the refrigerant of the good circuit is cooled to a lower temperature than the temperature of the refrigerant prior to the failure. 6. The method of operating a superconducting cable according to claim 1, characterized in that a refrigerator capable of cooling substantially down to the freezing point of the refrigerant is used to change the refrigerant temperature between the boiling point and the freezing point of that refrigerant. 7. The method of operating a superconducting cable according to claim 1, characterized in that a high freezing point refrigerant is replaced with a low freezing point refrigerant and a refrigerator is used capable of cooling substantially down to or below the freezing point of the high freezing point refrigerant and the low freezing point refrigerant's temperature is changed between the boiling point and the freezing point of this refrigerant. 8. The method of operating a superconducting cable according to claim 1, characterized in that the refrigerant is one of liquid nitrogen, liquid air, liquid hydrogen, liquid neon, liquid helium, and liquid oxygen. 9. A superconducting cable system comprising a plurality of superconducting cables connected by a parallel refrigerant flow path; a plurality of cooling mechanisms that cool a refrigerant and are operatively coupled to each of said parallel refrigerant flow paths; circulating mechanisms that circulate the refrigerant cooled by the plurality of cooling mechanisms to the superconducting cables; wherein the refrigerant flow path comprises a plurality of first pipes located on an upstream side with respect to said superconducting cable to provide the refrigerant to said superconducting cable; a plurality of second pipes located on a downstream side with respect to said superconducting cable to allow the refrigerant that has cooled said superconducting cable to pass through; wherein the plurality of first pipes are connected to each other and said plurality of second pipes are connected to each other; and refrigerant route switching mechanisms are configured to allow a cooling mechanism of a failed superconducting cable to supply refrigerant to a remaining operational superconducting cables. 10. The superconducting cable system according to claim 9, wherein the connected second pipes are adapted to route the refrigerant to the connected first pipes. 11. The superconducting cable system according to claim 9, wherein the refrigerant route switching mechanisms are located on both upstream and downstream from the cooling mechanisms. 12. The superconducting cable system according to claim 11, wherein the refrigerant route switching mechanisms are located downstream from the plurality of superconducting cables. 13. A method of operating a superconducting cable comprising: providing a first and second superconducting circuits having a superconductor cooled by a refrigerant having a refrigerant conveyed in a flow path; providing a first refrigerator for the first superconducting circuit, the first refrigerator being located upstream from the first superconducting circuit in the refrigerant flow path; providing a second refrigerator for the second superconducting circuit, the second refrigerator being located upstream from the second superconducting circuit in the refrigerant flow path; providing a parallel refrigerant flow path for the refrigerant by connecting the flow path of the refrigerant upstream from the first and second refrigerators and downstream from the first and second superconducting circuits; and cooling the first superconducting cable with the refrigerant from the first and second refrigerator by separating the refrigerant flow path for the second superconducting circuit from the refrigerant flow path for the first superconducting circuit flow. 14. The method of operating a superconducting cable according to claim 13, characterized in that when a power demand from a load connected with the superconducting cable increases, the refrigerant temperature is reduced to increase the transmission capacity of the superconducting cable to transmit electric power matching the power demand. 15. The method of operating a superconducting cable according to claim 13, characterized in that when a power demand from a load connected with the superconducting cable decreases, the refrigerant temperature is increased to decrease the transmission capacity of the superconducting cable to transmit electric power matching the power demand. 16. The method of operating a superconducting cable according to claim 13, characterized in that when one of the circuits fails, the refrigerant temperature of the good circuit is reduced below the temperature prior to the failure to increase the transmission capacity of the good circuit. 17. The method of operating a superconducting cable according to claim 16, characterized in that the refrigerant of the good circuit is cooled to a lower temperature than the temperature of the refrigerant prior to the failure. 18. The method of operating a superconducting cable according to claim 13, characterized in that a refrigerator capable of cooling substantially down to the freezing point of the refrigerant is used to change the refrigerant temperature between the boiling point and the freezing point of that refrigerant. 19. The method of operating a superconducting cable according to claim 13, characterized in that a high freezing point refrigerant is replaced with a low freezing point refrigerant and a refrigerator is used capable of cooling substantially down to or below the freezing point of the high freezing point refrigerant and the low freezing point refrigeranf's temperature is changed between the boiling point and the freezing point of this refrigerant. 20. The method of operating a superconducting cable according to claim 13, characterized in that the refrigerant is one of liquid nitrogen, liquid air, liquid hydrogen, liquid neon, liquid helium, and liquid oxygen.
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