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http://dx.doi.org/10.7782/JKSR.2017.20.2.203

Partial Discharge Characteristics and Localization of Void Defects in XLPE Cable  

Park, Seo-Jun (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University)
Hwang, Seong-Cheol (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University)
Wang, Guoming (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University)
Kil, Gyung-Suk (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Korean Society for Railway / v.20, no.2, 2017 , pp. 203-209 More about this Journal
Abstract
Research on condition monitoring and diagnosis of power facilities has been conducted to improve the safety and reliability of electric power supply. Although insulation diagnostic techniques for unit equipment such as gas-insulated switchgears and transformers have been developed rapidly, studies on monitoring of cables have only included aspects such as whether defects exist and partial discharge (PD) detection; other characteristics and features have not been discussed. Therefore, this paper dealt with PD characteristics against void sizes and positions, and with defect localization in XLPE cable. Four types of defects with different sizes and positions were simulated and PD pulses were detected using a high frequency current transformer (HFCT) with a frequency range of 150kHz~30MHz. The results showed that the apparent charge increased when the defect was adjacent to the conductor; the pulse count in the negative half of the applied voltage was about 20% higher than that in the positive half. In addition, the defect location was calculated by time-domain reflectometry (TDR) method, it was revealed that the defect could be localized with an error of less than1m in a 50m cable.
Keywords
PD; Void defect; Localization; XLPE cable; TDR;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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