Title :
Laser inspection of defects in HV XLPE cable insulation
Author :
Hong, Zhao ; Demin, Tu ; Hongwei, Zhao ; Xuan, Wang
Author_Institution :
Xi´´an Jiaotong Univ., China
Abstract :
Using the fact that under irradiation by a laser beam, black contaminants, microvoids and translucent impurities in XLPE insulation display different characteristics of light extinction and scattering, the relationships of detected pulse polarity with kinds of defects and the pulse width and amplitude with the size of the defects are found. Therefore, the detected signal can be applied for measuring and recognizing defects with the aid of a computer. The instrument for defect detection in bulk XLPE insulation is presented in this paper. It is shown in test results that the resolution of detection is 40 μm in HV XLPE samples with volume 33.6 cm3 at temperature 109°C
Keywords :
XLPE insulation; inspection; insulation testing; insulator contamination; measurement by laser beam; power cable insulation; power cable testing; voids (solid); 109 C; HV XLPE cable insulation; black contaminants; defect detection; laser inspection; light extinction; light scattering; microvoids; translucent impurities; Cable insulation; Computer displays; Impurities; Inspection; Laser beams; Light scattering; Optical pulses; Pollution measurement; Signal detection; Space vector pulse width modulation;
Conference_Titel :
Electrical Insulating Materials, 1995. International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
4-88686-047-8
DOI :
10.1109/ISEIM.1995.496503
