TY - GEN
T1 - The Effect of DC Electrothermal Aging on Breakdown Strength of Poly (ethylene terephthalate) Used in Laminated Busbar
AU - Xin, Lei
AU - Guo, Men
AU - Zhang, Chuang
AU - Xiang, Jiao
AU - Wang, Shihang
AU - Zhang, Xiaotong
AU - Li, Jianying
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/9/6
Y1 - 2020/9/6
N2 - The effect of DC electrothermal aging on breakdown strength (\pmb{E}_{\mathbf{b}}) of polyethylene terephthalate (PET) used in laminated busbar is studied. It is found that a maximum \pmb{E}_{\mathbf{b}} of 837 kV/mm was found for 96 hours' aged sample. The dependence of activation energy of dc conductivity on aging time is investigated. It is shown that the activation energy rise from 1.87 eV to 2.01 eV and then decline with increased aging time. The molecular chain is studied by FTIR to lucubrate the variation of activation energy, and the aggregation structure is studied by DSC. The results reveals that, for 96 hours' sample, crystallinity of PET increases from 33.05% to 36.12%, while the results of FTIR show no significant distinction. Decreased crystallinity and increased absorbance at the crest of carbonyl and hydroxyl groups are found with aging, indicating destroyed aggregation structure as well as broken molecular chains. Thus, the degradation of microstructure results in the reduction of activation energy of dc conduction, which finally leading to a decrease of \pmb{E}_{\mathbf{b}}.
AB - The effect of DC electrothermal aging on breakdown strength (\pmb{E}_{\mathbf{b}}) of polyethylene terephthalate (PET) used in laminated busbar is studied. It is found that a maximum \pmb{E}_{\mathbf{b}} of 837 kV/mm was found for 96 hours' aged sample. The dependence of activation energy of dc conductivity on aging time is investigated. It is shown that the activation energy rise from 1.87 eV to 2.01 eV and then decline with increased aging time. The molecular chain is studied by FTIR to lucubrate the variation of activation energy, and the aggregation structure is studied by DSC. The results reveals that, for 96 hours' sample, crystallinity of PET increases from 33.05% to 36.12%, while the results of FTIR show no significant distinction. Decreased crystallinity and increased absorbance at the crest of carbonyl and hydroxyl groups are found with aging, indicating destroyed aggregation structure as well as broken molecular chains. Thus, the degradation of microstructure results in the reduction of activation energy of dc conduction, which finally leading to a decrease of \pmb{E}_{\mathbf{b}}.
KW - Electrothermal Aging
KW - Laminated Busbar
KW - PET
UR - https://www.scopus.com/pages/publications/85099378827
U2 - 10.1109/ICHVE49031.2020.9280081
DO - 10.1109/ICHVE49031.2020.9280081
M3 - 会议稿件
AN - SCOPUS:85099378827
T3 - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
BT - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020
Y2 - 6 September 2020 through 10 September 2020
ER -