Title :
Analytical investigation on OPGW strands melting due to DC arc discharge simulating lightning strike
Author :
Iwata, Mikimasa ; Ohtaka, Toshiya ; Kuzuma, Yasukuni ; Goda, Yutaka
Author_Institution :
Electr. Power Eng. Res. Lab., Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan
Abstract :
Some metal strands of OPGW (composite fiber-optic ground wire) are sometimes melted and broken by lightning strikes. DC arc tests simulating lightning strikes have thus been performed to obtain their melting and breaking characteristics. In this paper, calculations regarding these melting characteristics are performed considering the transferred heat and its area from the arc to the strands. The melting characteristics of strands are calculated with an arc current of 0.1 - 100 kA, considering the current prescribed in the IEC standard and the measured actual lightning current. The calculation results of the strand melting duration depending on the arc current show a good agreement with the experimental values obtained in DC arc tests.
Keywords :
IEC standards; arcs (electric); composite materials; lightning protection; melting; optical cables; power cables; DC arc discharge; DC arc tests; IEC standard; OPGW strands melting; arc current; composite fiber-optic ground wire; lightning current; lightning strike; metal strands; transferred heat; Aluminum; Artificial intelligence; Electrodes; Heating; Iron; Optical fiber cables; Radiation detectors; arc discharges; ground wires; lightning; optical fiber cables; power transmission lines;
Conference_Titel :
Lightning Protection (ICLP), 2012 International Conference on
Conference_Location :
Vienna
Print_ISBN :
978-1-4673-1898-3
Electronic_ISBN :
978-1-4673-1896-9
DOI :
10.1109/ICLP.2012.6344238
