Academic Journal of Engineering and Technology Science, 2022, 5(3); doi: 10.25236/AJETS.2022.050304.
School of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang, 150022, China
Crosslinked polyethylene (XLPE) cables are now widely used in power transmission. Due to various factors, XLPE cables are unavoidable to produce defects during installation, transportation and use. These defects can easily cause partial discharge and even lead to cable breakdown accidents, which can cause great losses.  In this paper, three typical defects in XLPE cables are studied: air gap defect inside XLPE insulation, metal spike defect on the surface of insulation layer and metal particle defect on the main insulation surface. Electric field simulation is carried out by COMSOL finite element software. Three corresponding cable models under 132kV DC voltage are established, and the simulation analysis of electric field strength is carried out. The field strength distributions for different defects are obtained. The results show that the overall electric field strength of the insulation defect decreases with the distance from the surface of the cable insulation layer. However, the distortion of the electric field strength at the defect is different according to the location and size of the insulation defect. It needs to be simulated under different conditions.
Crosslinked polyethylene cable, typical defect, Finite element software, electric field strength, Partial discharge, Electric field distortion
Lei Tao. Field Strength Simulation of Typical Defects in XLPE Cable. Academic Journal of Engineering and Technology Science (2022) Vol. 5, Issue 3: 20-26. https://doi.org/10.25236/AJETS.2022.050304.
 Shan Bingliang, Li shuning, Yang Xiao, Wang Wei, Li Chengrong Key problems faced by XLPE distribution cable defect diagnosis and location technology [J]. 2021,36 (22): 4809-4819
 Zhang long, Zhang Wei, Li ruipeng, Li Hongjie, Terminal defect simulation and electric field analysis of 10kV XLPE cable [J]. Insulating materials, 2014,47 (04): 83-88
 Zhang Xuan, Wan Shuting, Liu Ronghai, Wu Zhangqin, Numerical analysis of electric field of cable main insulation defects [J]. Yunnan electric power technology, 2015,43 (03): 105-109
 Zhao Peng, Design of HVDC XLPE cable accessories based on COMSOL simulation [D]. China Electric Power Research Institute, 2018.
 Li Wenquan, Research on fault diagnosis and location of main insulation of high voltage XLPE cable [J]. Electrical switch, 2021,59 (01): 94-98.
 Hu Kai, Lu Zhifei, Yang Fengyuan, Zhang Lei, Typical defect simulation, pd research of HVDC XLPE cable [C], 2018 excellent proceedings of Zhejiang electric power society, 2018: 324-331.
 Du Hao, Guan Hong Lu, Chen Xiangrong, Hou Shuai, Partial discharge characteristics of typical defects of XLPE cable under DC voltage [J] High voltage technology, 2021, 47 (02): 555-563.
 He Ruobing, Chen Jia, Zhu Jinsong, Yang Xu, Yao Yuhang, Pan Cheng, PD characteristics and type identification of typical insulation defects of AC XLPE cable [J]. Electrician, 2020 (06): 5-13.
 Ma Xin, Zhang Huaiyin, Wu Jiyan, Tuo Ping, Effect of temperature on partial discharge characteristics of spiked defects in XLPE cables [J]. High voltage apparatus, 2021, 57 (05): 151-156