Testing and Demonstration Results of the 350 m Long HTS Cable System Installed in Albany, NY

Weber, C.S.; Lee, R.; Ringo, S. M.; Masuda, Takato; Yumura, H.; Moscovic, J.

doi:10.1109/tasc.2007.899828

Cited by 54 publications

(24 citation statements)

References 5 publications

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“…According to the literature (for example [3,4], etc.) in the existing short HTS power transmission lines temperature difference between outlet and inlet (¨T) is less than 2 K while maintaining a moderate circulation rate of the LN 2 .…”

Section: Introductionmentioning

confidence: 99%

Choice of flexible cryostat for 2.5 km DC HTS cable to be laid in St. Petersburg

Ivanov¹,

Romashov²,

Bemert³

et al. 2014

AIP Conference Proceedings

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Abstract. HTS tapes production technology has reached the level which allows the manufacture of high-quality cables of long length. In this connection, the issue of creating an HTS power transmission line of some kilometer length had been raised. Pressure loss appears as one of the limiting factors in the circulation of the liquid nitrogen cooling HTS cable placed in a long cryostat. Pressure loss is small in short lines and for this reason did not attract close attention of researchers until recently. Within the framework of the Russian R&D program for HTS power devices, 30 and 200 m AC HTS power transmission lines were created in 2008 and 2010, respectively, and a new 2.5 km 50 MW DC line to be installed in a real city network of St. Petersburg is now at the design and development phase. Pressure loss calculations show the 64/70 mm NEXANS-type corrugated flexible cryostat to be optimal for the cooling channel and the 39/44 mm one -for the return channel. In this case, it is possible to use just one cryopump and one cryocooler to achieve an operational temperature difference of 4-6 K and a pressure drop of 0.1-0.2 MPa in the cooling channel at a flow rate of 20-30 l/min.

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Section: Introductionmentioning

confidence: 99%

Choice of flexible cryostat for 2.5 km DC HTS cable to be laid in St. Petersburg

Ivanov¹,

Romashov²,

Bemert³

et al. 2014

AIP Conference Proceedings

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“…Over the last few years, high temperature superconductors have matured, especially due to the technical progress achieved in the manufacturing of these materials, and are now on the verge of industrial scale production. Furthermore, several superconducting cables [1][2][3][4][5] as well as superconducting fault current limiters [6][7][8] for power systems have been tested during the last years in real grid applications worldwide and are now on the threshold of commercialization. The experience gathered in these tests shows that all technical requirements are fulfilled so far and a high reliability of these new power devices can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Ampacity project - worldwide first superconducting cable and fault current limiter installation in a German city center

Stemmle

Merschel

Noë

et al. 2013

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013)

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In recent years significant progress has been made in the development of high temperature superconducting (HTS) power devices, in particular cables and fault current limiters. Several field tests of large scale prototypes for both applications have been successfully accomplished and the technologies are getting closer to commercialization. In this paper the German AmpaCity project will be introduced and its objectives will be described. Furthermore, the conceptual design of the HTS cable system and the major developments which have been achieved so far, as well as the current status of the project will be reported.

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“…As a result, practical operation of HTS cables in power systems has started in the United States and other countries [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…High-temperature superconducting (HTS) cables offer compact design and very low loss compared to conventional copper cables, and hence there has been extensive R&D worldwide on HTS cables as promising power cables for urban areas [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. As a result, practical operation of HTS cables in power systems has started in the United States and other countries [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Balanced three‐phase distribution experiment of a triaxial HTS cable

Hamajima¹,

Ozcivan²,

Shimoyama³

et al. 2011

Elect Comm in Japan

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SUMMARYHigh Temperature Superconducting (HTS) cables have been studied because of their low loss and compactness compared with conventional copper cables. Threephase cables are usually composed of three single-phase coaxial cables. Recently, triaxial cables, composed of three concentric phases, have been intensively developed, because they have advantages such as reduced amount of HTS tape, small leakage fields, and small heat loss in leaks, compared with three single-phase cables. However, there is an inherent imbalance in the three-phase currents in the triaxial cable due to differences in the radii of the threephase current layers. The imbalance of currents causes additional losses and large leakage field in the cable, and also degrades the electric power quality. Therefore, we propose a new model, a triaxial cable composed of two longitudinal sections with different twist pitches to obtain the solutions of the balanced three-phase currents and the homogeneous current distribution in each phase of the triaxial cable. We derive a general equation satisfying both the balanced three-phase currents and homogeneous current distribution, as functions of the winding pitches, and finally apply it to the simplest cable. We fabricated and tested a 1-m HTS cable in order to verify that the proposed theory can satisfy the balanced distribution. The results demonstrate the validity of the theory. We also investigated the current distributions along a long triaxial cable considering the capacitances between the layers in the triaxial cable.

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Testing and Demonstration Results of the 350 m Long HTS Cable System Installed in Albany, NY

Cited by 54 publications

References 5 publications

Choice of flexible cryostat for 2.5 km DC HTS cable to be laid in St. Petersburg

Choice of flexible cryostat for 2.5 km DC HTS cable to be laid in St. Petersburg

Ampacity project - worldwide first superconducting cable and fault current limiter installation in a German city center

Balanced three‐phase distribution experiment of a triaxial HTS cable

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