Influence of Composite Insulation Interface Defect Types and Position on Electric Field Distribution of Distribution Cable Accessories
Li Guochang1, Liang Xiaojian1, Wei Yanhui1, Su Guoqiang2, Lei Qingquan1
1. Institute of Advanced Electrical Materials Qingdao University of Science and Technology Qingdao 266042 China; 2. Electric Power Research Institute of State Grid Shandong Electric Power Company Jinan 250002 China
Abstract：Distribution cable accessory is the key component of distribution network system, and its composite insulation XLPE/SIR interface is the weakest insulation position. In this study, the typical defects that occur during the installation and operation of cable accessories has been simulated, seven kinds of interface defects, such as bubbles, air gap, water droplets, water film, metal impurity, semi-conductive impurity and insulation impurity, were designed at the interface of composite insulation XLPE/SIR of cable accessories, the internal electric field distortion law of cable accessories with typical defects is studied by establishing the electric field simulation model of interface defects of distribution cable accessories. The simulation results show that the maximum field distortion caused by bubble defect and air gap defect at the interface is 13kV/mm and 4.58kV/mm, respectively. With the increase of bubble defect size, the electric field distortion increases slightly. The maximum electric field distortion caused by water drop defect and water film defect is 2.94kV/mm and 3.74kV/mm, respectively. With the increase of defect size, the electric field distortion becomes more serious. When the defect size is doubled, the maximum electric field distortion caused by water droplets and film increases by 18.7% and 16%, respectively. As the defect moves away from the root of the stress cone, the electric field distortion caused by metal defects and semi-conductive defects increases first and then decreases, the maximum distortion electric field appears at about 2mm away from the stress cone, which is about 3.65kV/mm. In contrast, the maximum electric field distortion caused by insulation defects occurred at the root of the stress cone, which was about 8.74kV/mm, and with the defect away from the root of the stress cone, the electric field distortion shows an obvious downward trend. This work has important guiding significance for fault analysis and operation maintenance of cable accessories of distribution network.
李国倡, 梁箫剑, 魏艳慧, 苏国强, 雷清泉. 配电电缆附件复合绝缘界面缺陷类型和位置对电场分布的影响研究[J]. 电工技术学报, 2022, 37(11): 2707-2715.
Li Guochang, Liang Xiaojian, Wei Yanhui, Su Guoqiang, Lei Qingquan. Influence of Composite Insulation Interface Defect Types and Position on Electric Field Distribution of Distribution Cable Accessories. Transactions of China Electrotechnical Society, 2022, 37(11): 2707-2715.
[1] 陈诗佳, 周凯, 李泽瑞, 等. 硅凝胶改善XLPE/SIR界面绝缘特性的研究[J]. 绝缘材料, 2020, 53(5): 76-82. Chen Shijia, Zhou Kai, Li Zerui, et al.Study on insulating properties of XLPE/SIR interface improved by silicone gel[J]. Insulation Materials, 2020, 53(5): 76-82. [2] 邵光磊, 秦福宁, 赵金辉, 等. 电缆中间接头硅橡胶绝缘的电气特性研究[J]. 绝缘材料, 2020, 53(5): 76-82. Shao Guanglei, Qin Funing, Zhao Jinhui, et al.Study on electrical characteristics of silicone rubber insulation for cable joints[J]. Insulation Materials, 2020, 53(5): 76-82. [3] 昝海斌, 李国倡, 王景兵, 等. 动车组车顶高压电缆终端电场仿真及界面缺陷模拟研究[J]. 绝缘材料, 2020, 53(3): 99-104. Zan Haibin, Li Guochang, Wang Jingbing, et al.Electric field and interface defect simulation of high voltage cable terminal on electric multiple unit roof[J]. Insulation Materials, 2020, 53(3): 99-104. [5] 李亚莎, 代亚平, 花旭, 等. 杂质对交联聚乙烯电缆内部电场和空间电荷分布影响[J]. 电工技术学报, 2018, 33(18): 4365-4371. Li Yasha, Dai Yaping, Hua Xu, et al.The influence of impurities on electric field and space charge distribution in XLPE cable[J]. Transactions of China Electrotechnical Society, 2018, 33(18): 4365-4371. [6] 常文治, 李成榕, 苏錡, 等. 电缆接头尖刺缺陷局部放电发展过程的研究[J]. 中国电机工程学报, 2013, 33(7): 192-201. Chang Wenzhi, Li Chengrong, Su Qi, et al.Study on development of partial discharges at the defect caused by a needle damage to a cable joint[J]. Proccdings of the CSEE, 2013, 33(7): 192-201. [7] 李武强. 电力电缆受潮判断及除湿方法探究[J]. 机电信息, 2015(9): 5-6. Li Wuqiang.Determination of power cable moisture and dehumidification method[J]. Mechanical and Electrical Information, 2015(9): 5-6. [8] 袁野, 陈剑, 贾志东, 等. 10kV XLPE电缆受潮绝缘特性研究[J].电网技术, 2014, 38(10): 2875-2880. Yan Ye, Chen Jian, Jia Zhidong, et al.Study about insulating properties of 10 kV XLPE damp cable[J]. Power System Technology, 2014, 38(10): 2875-2880. [9] 李巍巍, 朱轲, 吴驰, 等. 不同温度下受潮电缆终端头的绝缘状态研究[J]. 环境技术, 2016, 34(4): 6-10, 23. Li WeiWei, Zhu Ke, Wu Chi, et al. Research on insulation condition of damp cable joint under different temperatures[J]. Environmental Technology, 2016, 34(4): 6-10, 23. [10] Sobhy S Desouky, Adel Z El-Dein, R A Abd El-Aal, et al. Analysis of the electric field distribution within MV cable joint in the presence of defects in cable insulation[J]. International Journal of Applied Energy Systems, 2019, 1(1): 35-45. [11] 赵学风, 倪辉, 李旭, 等. 10kV电缆附件中刀痕缺陷的局部放电趋势研究[J]. 高压电器, 2018, 54(7): 165-171. Zhao Xuefeng, Ni Hui, Li Xu, et al.Study on partial discharge tendency of knife incision defects in 10kV XLPE accessories[J]. High Voltage Apparatus, 2018, 54(7): 165-171. [12] 史济康, 曹家, 袁检, 等. XLPE电力电缆中间接头复合介质沿面放电研究[J]. 高电压技术, 2001, 27(4): 52-53. Shi Jikang, Cao jia, Yuan Jian, et al. Study on surface discharge of composite dielectric in XLPE power cable joints[J]. High Voltage Engineering, 2007, 27(4): 52-53. [13] He Jiahong, He Kang, Cui Longfei. Charge-simulation-based electric field analysis and electrical tree propagation model with defects in 10kV XLPE cable joint[J]. Energies, 2019, 12(23): 4519, 1-22. [14] 曾莼. 基于局放和介损的10kV XLPE电缆绝缘诊断研究[D]. 武汉: 华中科技大学, 2014. [15] 曹俊平, 刘黎, 黄肖为, 等. 高压电缆接头界面气隙缺陷模拟及状态特征量分析[J]. 绝缘材料, 2019, 52(2): 87-93. Cao Junping, Liu Li, Huang Xiaowei, et al.Simulation of interface air gap defect in high voltage cable joint and its state characteristic quantities analysis[J]. Insulation Materials, 2019, 52(2): 87-93. [16] 刘英, 苏宇, 文沛. 10kV XLPE电缆接头的电场模拟方法研究[J]. 高压电器, 2016, 52(4): 30-35. Liu Ying, Su Yu, Wen Pei.Research on electrical field simulation of 10kV cable join[J]. High Voltage Apparatus, 2016, 52(4): 30-35. [17] 李国倡, 王家兴, 魏艳慧, 等. 高压直流电缆附件XLPE/SIR材料特性及界面电荷积聚对电场分布的影响[J]. 电工技术学报, 2021, 36(14): 3081-3089. Li Guochang, Wang Jiaxing, Wei Yanhui, et al.Effect of material properties of XLPE/SIR and interface charge accumulation on electric field distribution of HVDC cable accessory[J]. Transactions of China Electrotechnical Society, 2021, 36(14): 3081-3089. [18] 尚康良, 曹均正, 赵志斌, 等. 320kV 高压直流电缆接头仿真分析和结构优化设计[J]. 中国电机工程学报, 2016, 36(7): 2018-2024. Shang Kangliang, Cao Junzheng, Zhao Shibin.Simulation analysis and design optimization of 320kV HVDC cable joint[J]. Proceedings of the CSEE, 2016, 36(7): 2018-2024. [19] 曹雯, 张敏, 刘倩, 等. 电缆接头复合界面处水分对其闪络特性的影响[J]. 高电压技术, 2018, 44(11): 52-53. Cao Wen, Zhang Min, Liu Qian, et al.Influence of moisture on flashover performance of composite interface cable joint[J]. High Voltage Engineering, 2018, 44(11): 52-53. [20] 常文治, 阎春雨, 李成榕, 等. 硅橡胶/交联聚乙烯界面金属颗粒沿面放电严重程度的评估[J]. 电工技术学报, 2015, 30(24): 245-254. Chang Wenzhi, Yan Chunyu, Li Chengrong.Assessment of creeping discharge initiated by metal particles on the silicone rubber/XLPE interface in cable joints[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 245-254.
2022, Vol. 37 
