| Title |
Analysis of Diagnosis and Very Low Frequency Experiment to Detect of Fault on 22.9kV Class Cable |
| Authors |
김영석(Kim, Young-Seok) ; 김택희(Kim, Taek-Hee) ; 김종민(Kim, Chong-Min) ; 송길목(Shong, Kil-Mok) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.10.1780 |
| Keywords |
XLPE cable ; Very low frequency ; Diagnosis ; Dielectric loss |
| Abstract |
This paper presents few case studies of state diagnosis of XLPE cables using very low frequency techniques. The power cables of 22.9kV which have installation fault were assessed using VLF technique in addition to other techniques like insulation resistance and DC voltage withstand test. From the experimental results, The dielectric loss(tanδ) values of degradation of the cable(joint, knife, needle) at U_0 were 5.839, 5.526 and 6.251, respectively and all values were "further study advised". VLF PD measurement was also found defective portion. These method was effective in defect to fault in the degradation of the cable. However, the breakdown did not occur in the degradation of the cable because of properties of XLPE insulation. Few case studies of using VLF tanδ diagnosis for fault are measured and analyzed. The tanδ values at U_0 were "further study advised" or "action required". |