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- Title
Cable temperature rise analysis and fault location considering sheath circulation .
- Authors
PAN Wen-xia; XIE Chen; ZHAO Kun; LI Xin-rui
- Abstract
Because the traditional IEC thermal circuit method can not calculate the temperature of the cable after the loop flow changes in complex working conditions, the finite element method combined with electromagnetic field and heat transfer theory was adopted to calculate and analyze the temperature rise of the cable after the loop flow changes under different common protective layer faults for three-phase cable under different grounding modes and operating conditions. Operating condition judgment provides reference. The results show that for the shield cross-connected grounding cable, the temperature of the fault phase cable rises to 10 ℃ after the fault of the water inlet or shield joint of the cross-connected box, and the temperature difference of the fault phase cable before and after the fault point appears to be 5 ℃ . For single-end grounded cable with sheath, the temperature of the front section of the cable at fault point rises above 13 ℃ compared with that of the normal operation after two-phase sheath failure, and there is a temperature difference of 10 ℃ between the front and back section of the cable at fault point; The temperature rise of three-phase cable and the temperature difference between different phases provide reference for the on-line monitoring of cable temperature. According to the temperature difference before and after the cable, the fault points of the cable can be located and repaired as soon as possible, so as to reduce the occurrence of subsequent breakdown and burnout accidents.
- Subjects
ELECTRIC fault location; FAULT location (Engineering); SUBMARINE cables; LOCATION analysis; FINITE element method; CABLES; ELECTROMAGNETIC fields
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2021, Vol 25, Issue 1, p38
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938/j.emc.2021.01.005