TY - GEN
T1 - Conductivity of HVDC Cable Insulation Materials
T2 - 2nd International Conference on Electrical Materials and Power Equipment, ICEMPE 2019
AU - Cao, Liang
AU - Zhong, Lisheng
AU - Li, Yinge
AU - Gao, Jinghui
AU - Chen, Guanghui
AU - Li, Wenpeng
AU - Li, Weikang
AU - Zhang, Chong
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - Extruded HVDC power cables have been aroused intensive attention in the recent years and a rapid rise in voltage level for cable systems highlights the electrical tolerance of insulation materials. As one of the key factors for HVDC cable insulation design, conductivity is required to be low enough to reduce thermal runaway. Various methods have been used to decrease conductivity of crosslinked polyethylene (XLPE). However, a significant obstacle for conductivity measurement is to obtain a representative results from a short time test. In this study, based on the same low density polyethylene (LDPE), conductivity of a nano Al2O3/XLPE composite and a polymer filled XLPE from 30°C to 90°C were investigated. It reveals that recorded current curves of nano composite show a similar behavior to ordinary XLPE, which differs significantly from that of the polymer filled XLPE. The reason may lie in space charge behaviors in these samples. And calculated conductivity of polymer filled XLPE is much lower than that of nano Al2O3/XLPE composite below 70°C and ordinary XLPE. Addition of polymer fillers increases thermal activation energy more significantly than nano-fillers does. These results may give an inspiration for the measurement of conductivity and development for HVDC cable insulation materials.
AB - Extruded HVDC power cables have been aroused intensive attention in the recent years and a rapid rise in voltage level for cable systems highlights the electrical tolerance of insulation materials. As one of the key factors for HVDC cable insulation design, conductivity is required to be low enough to reduce thermal runaway. Various methods have been used to decrease conductivity of crosslinked polyethylene (XLPE). However, a significant obstacle for conductivity measurement is to obtain a representative results from a short time test. In this study, based on the same low density polyethylene (LDPE), conductivity of a nano Al2O3/XLPE composite and a polymer filled XLPE from 30°C to 90°C were investigated. It reveals that recorded current curves of nano composite show a similar behavior to ordinary XLPE, which differs significantly from that of the polymer filled XLPE. The reason may lie in space charge behaviors in these samples. And calculated conductivity of polymer filled XLPE is much lower than that of nano Al2O3/XLPE composite below 70°C and ordinary XLPE. Addition of polymer fillers increases thermal activation energy more significantly than nano-fillers does. These results may give an inspiration for the measurement of conductivity and development for HVDC cable insulation materials.
UR - https://www.scopus.com/pages/publications/85067880772
U2 - 10.1109/ICEMPE.2019.8727319
DO - 10.1109/ICEMPE.2019.8727319
M3 - 会议稿件
AN - SCOPUS:85067880772
T3 - ICEMPE 2019 - 2nd International Conference on Electrical Materials and Power Equipment, Proceedings
SP - 349
EP - 352
BT - ICEMPE 2019 - 2nd International Conference on Electrical Materials and Power Equipment, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 7 April 2019 through 10 April 2019
ER -