Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables

doi:10.11985/2018.11.004

Abstract

Abstract:

In HVDC cables, the interface morphology between insulation and shielding will cause electric field distortion. This is one of the reasons of cable insulation faults. Such morphology is related to the carbon black particles added in the shielding. In the process of cable production, these carbon black particles may enter insulation, form bulges on the interface, and thus cause electric field concentration. In this paper, the above mechanism is considered. Geometric model of such morphology is established based on stochastic process. Finite element method is used to solve electric field distribution near the interface. Electric field distortion caused by interface morphology is studied from the aspect of statistics. As results show, to reduces such distortion, one of the most effective methods is increase carbon black particle diameter or reduce the depth of particle entry. If there are small and unremovable particles in the shielding, it is recommended that big carbon black particles should be added.

Key words: Interface morphology, HVDC cable, stochastic process, finite element method, simulation

CLC Number:

TM215

Yin Yi,Wu Jiandong,Hu Jialei,Zhang Lei,Sun Lu,Shen Yaojun. Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables[J]. Journal of Electrical Engineering, 2018, 13(11): 30-36.

Figures/Tables 13

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References 15

[1]	Alden R T H, Qureshy F A . HVDC—a review of applications and systems analysis methods[J]. Canadian Electrical Engineering Journal, 1984,9(4):139-145. doi: 10.1109/CEEJ.1984.6590969
[2]	Ye Hanyu, Fechner Tobias, Lei Xianzhang , et al. Review on HVDC cable terminations[J]. High voltage, 2018,3(2):79-89. doi: 10.1049/hve.2017.0144
[3]	Hanley T L, Burford R P, Fleming R J , et al. A general review of polymeric insulation for use in HVDC cables[J]. IEEE Electrical Insulation Magazine, 2003,19(1):13-24.
[4]	Liu Y, Zhang S, Cao X , et al. Simulation of electric field distribution in the XLPE insulation of a 320kV DC cable under steady and time-varying states[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2018,25(3):954-964. doi: 10.1109/TDEI.2018.006973
[5]	Du B X, Kong X X, Cui B , et al. Improved ampacity of buried HVDC cable with high thermal conductivity LDPE/BN insulation[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2017,24(5):2667-2676. doi: 10.1109/TDEI.2017.006452
[6]	Le Roy S, Teyssèdre G, Laurent C . Modelling space charge in a cable geometry[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2016,23(4):2361-2367. doi: 10.1109/TDEI.2016.7556514
[7]	Sun Y, Li Z, Suo C, et al. A simulation on space charge distribution caused by nonlinear conductivity in HVDC cable insulation [C]. IEEE International Symposium on Electrical Insulating Materials, 2017: 126-129.
[8]	Mauseth F, Haugdal H . Electric field simulations of high voltage DC extruded cable systems[J]. IEEE Electrical Insulation Magazine, 2017,33(4):16-21.
[9]	Zhang S, Liu Y. Simulation of space charge accumulation in LDPE under temperature gradient with temperature-dependent parameters [C]. IEEE 12th International Conference on the Properties and Applications of Dielectric Materials, 2018: 1028-1032.
[10]	Hao Y, Chen Y, Yang L, et al. Research on simplified equivalent method of 3D simulation model for temperature distribution of HVDC submarine cables [C]. IEEE 1st International Conference on Electrical Materials and Power Equipment, 2017: 102-108.
[11]	Zhan Yunpeng, Chen George, Hao Miao, et al. Thermal transient effects on space charge dynamics in HVDC extruded cable insulation [C]. IEEE 12th International Conference on the Properties and Applications of Dielectric Materials, 2018: 1044-1047.
[12]	李旭兵, 李瑞 . 高压交联电缆三层共挤绝缘屏蔽合缝问题的解决[J]. 电线电缆, 2007(3):42-43. doi: 10.3390/s20010162 pmid: 31888053
	Li Xubing, Li Rui . Gap-closing of the insulation screen during the triple extrusion process of HV XLPE cables[J]. Electric Wire & Cable, 2007(3):42-43. doi: 10.3390/s20010162 pmid: 31888053
[13]	欧阳本红, 华明, 邓显波 . 高压交联电缆材料及工艺发展综述[J]. 绝缘材料, 2016,49(7):1-6.
	Ouyang Benhong, Hua Ming, Deng Xianbo . A review about development of HV XLPE cable materials and processes[J]. Insulating Materials, 2016,49(7):1-6.
[14]	鄢薇, 甄建, 薛志刚 .可交联 PE 电缆用半导电屏蔽料开发现状[J]. 合成树脂及塑料, 2012(4):75-79.
	Yan Wei, Zhen Jian, Xue Zhigang . Development situations of semiconducting XLPE cable shielding material[J]. China Synthetic Resin and Plastics, 2012(4):75-79.
[15]	刘英, 王乐, 王磊 , 等. 从缺陷影响看高压 XLPE 电缆绝缘减薄的必要性[J]. 高电压技术, 2006,32(7):29-32.
	Liu Ying, Wang Le, Wang Lei , et al. Necessity of reducing the insulation thickness of HV XLPE cables from the defect point of view[J]. High Voltage Engineering, 2006,32(7):29-32.