Open AccessAn embedded wide-band sensor for PD on-line monitoring of XLPE cable joint
Author(s) -
Fangda Fu,
Xigang Yang,
Lin Cheng,
Luliang Wang,
Jing Zhang,
Zijun Pan
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1303/1/012098
Subject(s) - joint (building) , materials science , bandwidth (computing) , partial discharge , electrical conductor , electrical engineering , sensitivity (control systems) , voltage , polyethylene , antenna (radio) , electronic engineering , computer science , engineering , structural engineering , telecommunications , composite material
Monitoring partial discharge (PD) activities in the joint of cross-linked polyethylene (XLPE) cables has attracted much attention due to its extensive application and high fault rate. In this paper, we designed a wide-band sensor with simple configuration, which was embedded in the outer semi-conductive layer of the cable. Based on the analysis of circuit and antenna models, the structural parameters of sensor were determined, and it was found that the effective bandwidth reached up to 500 MHz. In addition, the sensor had a quick response to the pulse with a rising time longer than 2 ns by testing its square response, as well as a linear input-output characteristic and a sensitivity of 3 pC. At last, the sensor was applied to insulation defect type identification in the cable joint. As for three common defects, both the single PD pulse and PD patterns showed distinct. These indicated that the sensor had a potential application prospect in the PD online detection for cable joint.