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Cost precludes 765-kV underground circuit

Journal Article · · Electr. World; (United States)
OSTI ID:5144166
The high cost of labor and materials for installing underground SF/sub 6/ 765-kV transmision circuits has all but eliminated them as an option. American Electric Power Service Corp. (AEP) has discovered that the expected environmental and esthetic benefits may not be as great as anticipated. AEP feels that the financial penalty associated with long gas-insulated transmission line installations appears to be difficult to justify under any condition. The prospects for lowering the high initial cost seem to hinge on significant reductions in the amount of aluminum and SF/sub 6/ required, the development of flexible pipe, and the use of three-phase conductors in a single pipe to reduce material and installation costs. Other alternatives include a different mix of insulation gases and raising the operating voltage to the next higher level. Any one of these alternatives has the potential for reducing the price by 10 to 20%; however, the resultant system would still be very expensive and dependent on an extrapolated design yet to be tested in the field.
Research Organization:
American Electric Power Service Corp., New York, NY
OSTI ID:
5144166
Journal Information:
Electr. World; (United States), Journal Name: Electr. World; (United States) Vol. 193:6; ISSN ELWOA
Country of Publication:
United States
Language:
English

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Related Subjects

200302* -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
29 ENERGY PLANNING, POLICY, AND ECONOMY
296002 -- Energy Planning & Policy-- Electric Power Transmission & Distribution-- (-1989)
AC SYSTEMS
AESTHETICS
BUILDING MATERIALS
CABLES
CONDUCTOR DEVICES
COST
EHV AC SYSTEMS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
GAS-INSULATED CABLES
HALIDES
HALOGEN COMPOUNDS
LABOR
MATERIALS
POWER SYSTEMS
POWER TRANSMISSION
SULFUR COMPOUNDS
SULFUR FLUORIDES
UNDERGROUND POWER TRANSMISSION