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Proposal on modeling of pressure rise and propagation due to short‐circuit fault arc on a CVT cable installed in a protective pipe
Author(s) -
Tadokoro Tomo,
Ohtaka Toshiya,
Amakawa Tadashi
Publication year - 2012
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22291
Subject(s) - fault (geology) , arc (geometry) , waveform , computational fluid dynamics , short circuit , engineering , electric arc , power (physics) , structural engineering , electrical engineering , mechanics , mechanical engineering , voltage , geology , physics , aerospace engineering , electrode , quantum mechanics , seismology
In underground distribution systems, a CVT (cross‐linked polyethylene insulated PVC sheathed triplex) cable is installed in a protective pipe. When a fault arc occurs on the CVT cable, the pressure instantly increases due to the high temperature of the arc, then propagates in the pipe. The pressure rise and its propagation may seriously damage the pipe and connected power equipment. There are many different sizes of pipes and cables depending on the installation situation, and fault arcs occur under various conditions. Therefore, the simulation technique is effective for examining such pressure rise and propagation in addition to short‐circuit tests. The objective of this paper is to present a CFD (computational fluid dynamics) modeling that can be used to evaluate the characteristics of the pressure rise and propagation due to a fault arc in the protective pipe. The pressure‐rise waveforms obtained by CFD analysis were found to be similar to those from short‐circuit test results. In addition, the dependence of the maximum pressure rise on the size of the CVT cable and on the arc current was simulated well. Therefore, CFD modeling is sufficient for study of the pressure rise and its propagation in a protective pipe. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(3): 9‐18, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.22291