TY - GEN
T1 - Electric Field Distribution Considering the Byproducts Inhomogeneity of Crosslinking Insulation in HVDC Cable
AU - Li, Fei
AU - Zhong, Lisheng
AU - Gao, Jinghui
AU - Li, Wenpeng
AU - Wang, Cong
AU - Tao, Hexiang
AU - Yu, Qinxue
AU - Feng, Chao
AU - Li, Qingwu
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/7/12
Y1 - 2021/7/12
N2 - Crosslinking byproducts are inevitable in XLPE cable crosslinking process, and will affect the DC dielectric properties of cable insulation and cause the electric field distortion. It is of great importance to effectively control the cleanness and eliminate the byproducts during crosslinking. In this paper, the byproducts contents of degassed HVDC cable insulation and undegassed HVDC cable insulation are analyzed by using the infrared spectrometer. It is found that after degassing the byproducts content decreases, while the standard deviation of radial distribution of byproducts increases 144% at most. Then, the DC conductivity at 1050 kV/mm and 3070 °C is measured for cables insulation. Result shows that the DC conductivity decreases but the standard deviation of logarithm of XLPE insulation conductivity increases 400% at most after degassing. Moreover, the electric field distribution has been simulated in XLPE insulation of the HVDC cables with different degassing periods. After degassing, the maximum electric field strength increases from 35.9 kV/mm to 40.4 kV/mm under 1.85U0 and full load condition. The results show that the inhomogeneity level of byproducts have a significant impact on electric field distribution of XLPE cable insulation, which should be taken into consideration in HVDC cable manufacture.
AB - Crosslinking byproducts are inevitable in XLPE cable crosslinking process, and will affect the DC dielectric properties of cable insulation and cause the electric field distortion. It is of great importance to effectively control the cleanness and eliminate the byproducts during crosslinking. In this paper, the byproducts contents of degassed HVDC cable insulation and undegassed HVDC cable insulation are analyzed by using the infrared spectrometer. It is found that after degassing the byproducts content decreases, while the standard deviation of radial distribution of byproducts increases 144% at most. Then, the DC conductivity at 1050 kV/mm and 3070 °C is measured for cables insulation. Result shows that the DC conductivity decreases but the standard deviation of logarithm of XLPE insulation conductivity increases 400% at most after degassing. Moreover, the electric field distribution has been simulated in XLPE insulation of the HVDC cables with different degassing periods. After degassing, the maximum electric field strength increases from 35.9 kV/mm to 40.4 kV/mm under 1.85U0 and full load condition. The results show that the inhomogeneity level of byproducts have a significant impact on electric field distribution of XLPE cable insulation, which should be taken into consideration in HVDC cable manufacture.
KW - XLPE cable
KW - crosslinking byproducts
KW - electric field distribution
KW - radial inhomogeneity
UR - https://www.scopus.com/pages/publications/85112019725
U2 - 10.1109/ICPADM49635.2021.9493889
DO - 10.1109/ICPADM49635.2021.9493889
M3 - 会议稿件
AN - SCOPUS:85112019725
T3 - Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
SP - 318
EP - 321
BT - 13th International Conference on the Properties and Applications of Dielectric Materials
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2021
Y2 - 12 July 2021 through 14 July 2021
ER -