DocumentCode :
3445851
Title :
Ampacity evaluation of high-pressure gas-filled- (HPGF) pipe-type cables under Bridgeport harbor
Author :
Bascom, Farle C. ; Williams, Jay A. ; Pasha, Mohammad A. ; Rahman, Syed M. ; Zenger, Walter
Author_Institution :
Power Delivery Consultants, Inc., Ballston, NY, USA
Volume :
3
fYear :
2003
fDate :
7-12 Sept. 2003
Firstpage :
852
Abstract :
Ampacities of two 115 kV high-pressure gas-filled (HPGF) pipe-type cables in Bridgeport, Connecticut are limited by a portion of the circuit that crosses under the Pequonnock river. The installation conditions, soil thermal parameters and circuit loading effects were studied using various technologies including a gyroscopic route survey, hydrographic water bottom evaluation to find the depth of cover, and temperature measurements with thermocouples and distributed temperature sensing (DTS) using fiber optic cable. The results of the evaluation showed that the loss factors were increasing on the circuits and the ratio of one circuit´s load to the other was becoming smaller, both of which resulted in a reduction in the peak current carrying capacity. However, additional studies were able to reveal several methods for uprating the circuit capacity including the use of forced air ventilation on a spare pipe running in parallel with the two energized cable pipes. This paper summarizes the results of ampacity study and describes the various uprating techniques that were applied.
Keywords :
gyroscopes; optical cables; power cables; temperature measurement; thermocouples; 115 kV; Bridgeport harbor; Connecticut; Pequonnock river; air ventilation; ampacity evaluation; circuit capacity; circuit load; distributed temperature sensing; fiber optic cable; gyroscopic route survey; high-pressure gas-filled-pipe-type cables; hydrographic water; soil thermal parameters; temperature measurements; thermocouples; uprating techniques; Circuits; Optical fiber cables; Optical fibers; Optical losses; Rivers; Soil; Temperature measurement; Temperature sensors; Thermal loading; Ventilation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2003 IEEE PES
Print_ISBN :
0-7803-8110-6
Type :
conf
DOI :
10.1109/TDC.2003.1335045
Filename :
1335045
Link To Document :
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