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

fYear

2013

fDate

20-23 Oct. 2013

Firstpage

1298

Lastpage

1301

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/CEIDP.2013.6748178

Filename

6748178