Title :
Defects detection and localization of short cables with DAC method
Author :
Jun Jiang ; Guoming Ma ; Wenzhi Chang ; Jian He ; Dingping Luo ; Chengrong Li ; Qingmin Li
Author_Institution :
State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China
Abstract :
Localization XLPE cable defects with damped AC (DAC) voltage technique is suitable for medium-length cable (1000m~3000m), however, the precision decreases when the cable is shorter than 500m. For it is hard to distinguish the incident and reflected pulses in time using time domain reflectometry (TDR) with high oscillating frequency. To solve the problem, a compensation capacitor in parallel and optimization of detect unit and amplifier are proposed. This paper presents a laboratory experiment on 10kV XLPE short cables (<;500m) with four artificial typical defects. The results of defects detection and PD mapping are satisfactory, which prove the feasibility and effectiveness of damped AC voltage method to detect and locate the insulation defects of short cables.
Keywords :
XLPE insulation; amplifiers; power cable insulation; power capacitors; time-domain reflectometry; DAC voltage; PD mapping; TDR; XLPE cable defects; amplifier; artificial typical defects; capacitor; damped AC voltage; defect detection; defect localization; high oscillating frequency; medium-length cable; short cables; time domain reflectometry; voltage 10 kV; Cable shielding; Needles; Partial discharges; Power cable insulation; Power cables;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CEIDP.2013.6748178
