5-M Single-Phase HTS Transmission Cable Tests

Lue, J.W.; Barber, G. C.; Demko, J. A.; Gouge, M.J.; Schwenterly, S. W.; Stovall, J.P.; Martin, Ronald L.; Hughey, R.L.; Sinha, Uday Kumar; Tolbert, J.C.

doi:10.1007/978-1-4615-4215-5_71

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…The coating speed, annealing speed, and the atmosphere were varied during the LZO dip-coating. Four coating speeds (20,80,300, and 1000 cm/h) were used along with four annealing speeds (10,30,40, and 60 cm/h), and the process atmosphere was varied between dry and wet Ar-4% H 2 gas. The effect of these variables on the properties of the LZO film are discussed in the following sections.…”

Section: Resultsmentioning

confidence: 99%

ORNL Superconducting Technology Program for Electric Power Systems--Annual Report for FY 2001

Hawsey¹

2002

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Two major new laboratories were renovated and equipped as part of the Accelerated Coated Conductor Initiative (ACCI). One laboratory houses conductor-processing facilities, and the other houses conductor-characterization facilities. Office space for two industrial partners and three postdoctoral fellows has been included in the laboratory design. To support the ACCI research activities at ORNL, two new staff members and three new postdoctoral fellows have been hired. Over $1M in new equipment was purchased for these laboratories. Industry has been involved through secure web-based exchange of long-length texture data, joint experiments, and equipment specifications. On-site industry assignments are anticipated in FY 2002. PROGRAMMATIC Three new documents were completed and posted on the ORNL HTS web site, http://www.ornl.gov/ HTSC/htsc.html. The Cryogenics Roadmap and the Cryogenic Implementation Plan were assembled and posted. In addition, an extensively revised and updated version of An Analysis of Future Prices and Markets for High Temperature Superconductors (the Mulholland Report) was completed. The report contains a detailed identification of the analysis pathways in the original Mulholland spreadsheet, identification of assumptions, examination of the specific device models, extension of the analysis period to 2025, and recalculations to reflect these changes.

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Section: Resultsmentioning

confidence: 99%

ORNL Superconducting Technology Program for Electric Power Systems--Annual Report for FY 2001

Hawsey¹

2002

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“…Note that between these two dc V-I measurements, the cable was subjected to high-voltage withstand tests to 18 kV, impulse tests to 90 kV, long-duration (72-h) testing at the design current and voltage, and tens of cool-down and warm-up cycles [3], [4]. The cable showed no degradation in its dc characteristics throughout these tests.…”

Section: DC Characteristics Of the Cablementioning

confidence: 99%

“…Oak Ridge National Laboratory (ORNL) worked very closely with Southwire in developing this cable system. An HTS cable test facility [2] was built and was used to test two 5-m single-phase cables for their dc and ac characteristics and the high-voltage integrity of the cold-dielectric design [3].…”

Section: Introductionmentioning

confidence: 99%

Fault current tests of a 5-m HTS cable

Lue

Barber

Demko

et al. 2001

IEEE Trans. Appl. Supercond.

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Abstract-The first industrial demonstration of a threephase high-temperature superconducting transmission power cable at the Southwire manufacturing complex is in progress. One crucial issue during operation of the 30-m HTS cables is whether they could survive the fault current (which can be over an order of magnitude higher than the operating current) in the event of a short-circuit fault and how HTS cables and the cryogenic system would respond. Simulated fault-current tests were performed at ORNL on a 5-m cable. This single-phase cable was constructed in the same way as the 30-m cables and is also rated for 1250 A at 7.2 kV ac line-to-ground voltage. Tests were performed with fault-current pulses of up to 15 kA (for 0.5 s) with pulse lengths of up to 5 s (at 6.8 kA). Although a large voltage drop was produced across the HTS cable during the fault-current pulse, no significant changes in the coolant temperature, pressure, or joint resistance were observed. The cable survived 15 simulated fault-current shots without any degradation in its V-I characteristics.

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“…To date it has proven difficult to measure the AC losses in three-phase high temperature superconducting (HTS) cables. Whilst thermal methods (calorimetric or thermometric) have been used, they have limited resolution, often limited accuracy and can be very time consuming [1][2][3]. The thermal time constant of a three-phase cable bundle might be hours, and the experimental conditions (for example, liquid nitrogen temperature, flow rates etc) must be held constant throughout that period.…”

Section: Introductionmentioning

confidence: 99%

The electrical measurement of AC losses in a three-phase tri-axial superconducting cable

Ashworth¹,

Nguyen²

2010

Supercond. Sci. Technol.

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In a three-phase tri-axial cable, the magnetic interaction between the phases makes the loss measurement by an electromagnetic method very complex. We developed the theoretical background showing that three-phase AC loss measurements by the electromagnetic method are, in principle, possible. We then implemented this theory in practical measurements on a 3 m long, tri-axial cable fabricated from RABiTS (rolling-assisted biaxially textured substrate) coated conductor. Initially, the proposed measurement technique was implemented in the simpler cases when the three cable phases are 180 • out of phase, i.e. (0 • , 180 • , 360 • ) or (0 • , 360 • , 180 • ) rather than (0 • , 120 • , 240 • ) as in a traditional three-phase system. For these cases, the currents in the phases are either in phase (360 • phase difference) or anti-phase (180 • phase difference). These are essentially single-phase measurements with only one transport current used as the supply for all three phases. This simplification allowed us to use both the established and the proposed techniques to measure the total losses of the cable for these cases. An excellent agreement between the two measurement methods confirmed the validation of our proposed measurement technique. The proposed measurement method was then employed to measure the total AC losses in a cable when it operates in the true three-phase mode. We believe that these data represent the first electromagnetic three-phase AC loss measurements.

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5-M Single-Phase HTS Transmission Cable Tests

Cited by 14 publications

References 4 publications

ORNL Superconducting Technology Program for Electric Power Systems--Annual Report for FY 2001

ORNL Superconducting Technology Program for Electric Power Systems--Annual Report for FY 2001

Fault current tests of a 5-m HTS cable

The electrical measurement of AC losses in a three-phase tri-axial superconducting cable

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