skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Horizontal cryogenic bushing for the termination of an ac superconducting power transmission line

Abstract

The design and testing of a cryogenic bushing for the termination of a 138 kV 3-phase superconducting power transmission line are discussed. Three combined voltage and current bushings have been tested. Vacuum leaks and refrigerator capacity have limited the helium density attained and prevented complete voltage tests while cold; the bushings have attained satisfactory PDI and excellent impulse withstand when tested warm in SF/sub 6/. The excessive coolant flow required in the second of the three led to lengthening the temperature transition region in the third, No. 112. This bushing was run stably with currents in excess of 4 kA, and was tested at 6 kA, but without sufficient coolant flow to prevent a very slow temperature rise. The coolant flows required are 40% greater than expected. A possible cause is a radial curing void under the outer conductor which will be backfilled in the next bushing. The epoxy filler presently used results in a rather high thermal conductance, and a new formulation may be tried.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA)
OSTI Identifier:
5342376
Report Number(s):
BNL-29950; CONF-810835-44
ON: DE82017629
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Technical Report
Resource Relation:
Conference: 1981 cryogenic engineering conference, San Diego, CA, USA, 10 Aug 1981
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AC SYSTEMS; SUPERCONDUCTING CABLES; POTHEADS; DESIGN; FABRICATION; PERFORMANCE; COOLING; CRYOGENICS; EXPERIMENTAL DATA; HELIUM; POWER TRANSMISSION LINES; SULFUR FLUORIDES; CABLES; CONDUCTOR DEVICES; DATA; ELECTRIC CABLES; ELECTRICAL EQUIPMENT; ELEMENTS; ENERGY SYSTEMS; EQUIPMENT; FLUIDS; FLUORIDES; FLUORINE COMPOUNDS; GASES; HALIDES; HALOGEN COMPOUNDS; INFORMATION; NONMETALS; NUMERICAL DATA; POWER SYSTEMS; RARE GASES; SULFUR COMPOUNDS; 200303* - Power Transmission & Distribution- Superconducting & Cryogenic Systems- (-1989); 420201 - Engineering- Cryogenic Equipment & Devices

Citation Formats

Morgan, G H, Jensen, J E, McNerney, A J, Minati, K F, and Schmidt, R D. Horizontal cryogenic bushing for the termination of an ac superconducting power transmission line. United States: N. p., 1981. Web.
Morgan, G H, Jensen, J E, McNerney, A J, Minati, K F, & Schmidt, R D. Horizontal cryogenic bushing for the termination of an ac superconducting power transmission line. United States.
Morgan, G H, Jensen, J E, McNerney, A J, Minati, K F, and Schmidt, R D. 1981. "Horizontal cryogenic bushing for the termination of an ac superconducting power transmission line". United States.
@article{osti_5342376,
title = {Horizontal cryogenic bushing for the termination of an ac superconducting power transmission line},
author = {Morgan, G H and Jensen, J E and McNerney, A J and Minati, K F and Schmidt, R D},
abstractNote = {The design and testing of a cryogenic bushing for the termination of a 138 kV 3-phase superconducting power transmission line are discussed. Three combined voltage and current bushings have been tested. Vacuum leaks and refrigerator capacity have limited the helium density attained and prevented complete voltage tests while cold; the bushings have attained satisfactory PDI and excellent impulse withstand when tested warm in SF/sub 6/. The excessive coolant flow required in the second of the three led to lengthening the temperature transition region in the third, No. 112. This bushing was run stably with currents in excess of 4 kA, and was tested at 6 kA, but without sufficient coolant flow to prevent a very slow temperature rise. The coolant flows required are 40% greater than expected. A possible cause is a radial curing void under the outer conductor which will be backfilled in the next bushing. The epoxy filler presently used results in a rather high thermal conductance, and a new formulation may be tried.},
doi = {},
url = {https://www.osti.gov/biblio/5342376}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: