Characterization of Electrical Treeing in XLPE versus Temperature Gradients

Zhao, Xin; Zhang, Siyi; Chengyong, Lin; Yang, Zhiduan; Li, Zhonglei; Han, Tao

doi:10.1109/icd46958.2020.9341977

Cited by 1 publication

(1 citation statement)

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“…The laying condition along the line is changeable, and numerous loads are distributed along the line. Factors such as inherent defects and external force damage may cause cable failures, primarily when the cable works in a plateau area for a very long time, unfavorable factors such as low air pressure and high cold will reduce the insulation strength of the cable and accelerate the aging of the insulating medium [1,2]. In addition, the location and identification of faults in these cables are even trickier due to the complexity of the power supply network and the invisibility of cable faults.…”

Section: Introductionmentioning

confidence: 99%

Research on Temperature Monitoring Method of Cable on 10 kV Railway Power Transmission Lines Based on Distributed Temperature Sensor

2021

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Railway power transmission lines (RPTL) are power lines that provide nontraction power supply for railways, such as communications and signals along the railway. With the advancement of technology, power cables are being used more and more widely. Operational experience has shown that during the operation of power cables, abnormal heat is often caused by fault factors such as poor joint crimping and severe partial discharge caused by insulation defects, leading to cable burns in extreme cases. Distributed temperature sensors (DTS), a kind of spatial continuous temperature sensor using sensing optical fiber, can measure the temperature along the cable and are expected to realize on-line monitoring and positioning of cable heating faults. This paper first builds a finite element model of the cable under various faults to calculate the distribution characteristics of the temperature field of the faulty cable. Then the results are verified through experiments with the external sensing fiber and the artificially manufactured heating points of the cable. The conclusions show that it is feasible to use a distributed sensing fiber to monitor and locate the heating fault of power cable.

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Section: Introductionmentioning

confidence: 99%