Simulation on Electric Field Distribution of 1 100kV AC Tri-Post Insulator Influenced by Defects
Liu Peng1, Wu Zehua1, Zhu Sijia1, Xu Jiazong2, Liu Qingdong2, Peng Zongren1
1. State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China; 2. Shandong Electrical Engineering & Equipment Group Co. Ltd Jinan 250022 China
Abstract：Defects and conductive particles will seriously distort the electric field distribution of tri-post insulators in GIL, and even lead to breakdown. In this paper, the possible defects and their sources in UHV GIL were analyzed, and the influence of defects, including interface defects, inner void and conductive particles, on the electric field distribution of the tri-post insulator was calculated by the COMSOL Multiphysics software. The results show that interface defects on metal insert and center conductor surface have the similar effects. The longer and thinner the interface defects are, the higher the maximum value of field is. As for the inner voids, the size seems to have small impact on the electric field distribution, but the location closer to the metal insert has more damage to the insulation. Attached conductive metal particles can significantly enhance the electric field, but has influence on the maximum electric field value, and the larger the size, the larger the range of electric field distortion. The larger size and shorter height of suspended conductive particles cause more serious distortion, and the maximum value of field strength increases when the particles are closer the sphere zone. Among the defects, conductive particles are the most harmful to insulation, followed by interface defects.
刘鹏, 吴泽华, 朱思佳, 徐家忠, 刘庆东, 彭宗仁. 缺陷对交流1 100kV GIL三支柱绝缘子电场分布影响的仿真[J]. 电工技术学报, 2022, 37(2): 469-478.
Liu Peng, Wu Zehua, Zhu Sijia, Xu Jiazong, Liu Qingdong, Peng Zongren. Simulation on Electric Field Distribution of 1 100kV AC Tri-Post Insulator Influenced by Defects. Transactions of China Electrotechnical Society, 2022, 37(2): 469-478.
[1] 高克利, 颜湘莲, 刘焱, 等. 环保气体绝缘管道技术研究进展[J]. 电工技术学报, 2020, 35(1): 3-20. Gao Keli, Yan Xianglian, Liu Yan, et al.Progress of technology for environment-friendly gas insulated transmission line[J]. Transactions of China Electro- technical Society, 2020, 35(1): 3-20. [2] 李冰, 肖登明, 赵谡, 等. 第二代气体绝缘输电线路的温升数值计算[J]. 电工技术学报, 2017, 32(13): 271-276. Li Bing, Xiao Dengming, Zhao Su, et al.Temperature rise numerical calculation of the second generation gas insulated transmission line[J]. Transactions of China Electrotechnical Society, 2017, 32(13): 271-276. [3] 李志闯, 郑忠波, 刘一树, 等. C4F7N/CO2混合气体中252kV盆式绝缘子工频沿面闪络特性研究[J]. 电工技术学报, 2020, 35(1): 62-69. Li Zhichuang, Zheng Zhongbo, Liu Yishu, et al.Surface flashover characteristics of the 252kV conical insulator in C4F7N/CO2 gas mixtures under AC voltage[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 62-69. [4] 王渊, 马国明, 周宏扬, 等. SF6/N2混合气体中直流叠加雷电冲击复合电压作用下绝缘子闪络特性[J]. 电工技术学报, 2019, 34(14): 3084-3092. Wang Yuan, Ma Guoming, Zhou Hongyang, et al.Flashover characteristics of spacers in SF6/N2-filled under composite voltage of DC and lightning impulse[J]. Transactions of China Electrotechnical Society, 2019, 34(14): 3084-3092. [5] Shao Xianjun, Zhu Mingxiao, He Wenlin, et al.Dependence of partial discharge UHF characteristics on metal particle position at insulating spacer in GIS[C]//IEEE Asia-Pacific Power and Energy Engin- eering Conference, Brisbane, 2015: 1-5. [6] 李庆民, 王健, 李伯涛, 等. GIS/GIL中金属微粒污染问题研究进展[J]. 高电压技术, 2016, 42(3): 849-860. Li Qingmin, Wang Jian, Li Botao, et al.Review on metal particle contamination in GIS/GIL[J]. High Voltage Engineering, 2016, 42(3): 849-860. [7] 张连根, 路士杰, 李成榕, 等. 气体绝缘组合电器中微米量级金属粉尘运动和放电特征[J]. 电工技术学报, 2020, 35(2): 444-452. Zhang Liangen, Lu Shijie, Li Chengrong, et al.Movement and discharge characteristics of micron- scale metal dust in gas insulated switchgear[J]. Transactions of China Electrotechnical Society, 2020, 35(2): 444-452. [8] 张连根, 路士杰, 李成榕, 等. GIS中线形和球形金属微粒的运动行为和危害性[J]. 电工技术学报, 2019, 34(20): 4217-4225. Zhang Liangen, Lu Shijie, Li Chengrong, et al.Motor behavior and hazard of spherical and linear particle in gas insulated switchgear[J]. Transactions of China Electrotechnical Society, 2019, 34(20): 4217-4225. [9] 黄旭炜, 倪潇茹, 王健, 等. 苯硫醚聚酰亚胺电极覆膜材料合成及直流应力下对金属微粒运动特性的抑制作用[J]. 电工技术学报, 2018, 33(20): 4712-4721. Huang Xuwei, Ni Xiaoru, Wang Jian, et al.Synthesis of phenyl-thioether polyimide as the electrode coating film and its suppression effect on motion behavior of the metal particles under DC stress[J]. Transactions of China Electrotechnical Society, 2018, 33(20): 4712-4721. [10] 齐波, 李成榕, 郝震, 等. GIS绝缘子表面固定金属颗粒沿面局部放电发展的现象及特征[J]. 中国电机工程学报, 2011, 31(1): 101-108. Qi Bo, Li Chengrong, Hao Zhen, et al.Evolution phenomena and features of surface partial discharge initiated by immobilized metal particles on GIS insulator[J]. Proceedings of the CSEE, 2011, 31(1): 101-108. [11] Qi Bo, Li Chengrong, Hao Zhen, et al.Surface discharge initiated by immobilized conductive particles attached to gas insulated substation insulators: process and features[J]. IEEE Transactions on Dielectrics & Electrical Insulation, 2011, 18(3): 792-800. [12] Qi Bo, Li Chengrong, Hao Zhen, et al.Partial discharge initiated by free moving conductive particles on GIS insulator surface: severity diagnosis and assessment[J]. IEEE Transactions on Dielectrics & Electrical Insulation, 2014, 21(2): 766-774. [13] Radwan R M, Abou-Elyazied A M. Effect of solid spacers' dimensions and permittivity on the electric field distribution in gas insulated systems[C]// Eleventh IEEE International Middle East Power Systems Conference, EI-Minia, Egypt, 2006: 234-239. [14] Radwan R M, Abou-Elyazied A M. Effect of spacer's defects and conducting particles on the electric field distribution along their surfaces in GIS[J]. IEEE Transactions on Dielectrics & Electrical Insulation, 2007, 14(6): 1484-1491. [15] Tian Huidong, Wang Haoran, Guo Zihao, et al.Influence of key structure parameters on electrical field distribution of tri-post insulator used in UHV[C]// IEEE International Symposium on Electrical Insu- lating Materials, Nagoya, 2017: 275-278. [16] 汪建成, 谢文刚, 宫瑞磊, 等. 550kV GIL三支柱绝缘子设计[J]. 高压电器, 2018, 54(5): 114-118. Wang Jiancheng, Xie Wengang, Gong Ruilei, et al.Design of 550kV three post insulator[J]. High Voltage Apparatus, 2018, 54(5): 114-118. [17] 吴德贯, 彭翔, 李红元, 等. 一起500kV GIL绝缘子炸裂故障分析[J]. 电瓷避雷器, 2016(1): 40-43. Wu Deguan, Peng Xiang, Li Hongyuan, et al.Analysis of a 500kV GIL insulator burst fault[J]. Insulators and Surge Arresters, 2016(1): 40-43. [18] Okabe S.Insulation properties and degradation mechanism of insulating spacers in gas insulated switchgear (GIS) for repeated/long voltage applica- tion[J]. IEEE Transactions on Dielectrics & Electrical Insulation, 2007, 14(1): 101-110. [19] 庄丞, 曾建斌, 袁传镇. 表面异物对252kV气体绝缘组合电器盆式绝缘子绝缘性能的影响[J]. 电工技术学报, 2019, 34(20): 4208-4216. Zhuang Cheng, Zeng Jianbin, Yuan Chuanzhen.Effect of surface foreign matters on the insulation property of 252kV gas insulated switchgear basin insulators[J]. Transactions of China Electrotechnical Society, 2019, 34(20): 4208-4216. [20] 王闯, 赵朗, 孙青, 等. 界面涂层对特高压GIS盆式绝缘子导体-绝缘盆体界面处电场调控[J]. 高电压技术, 2020, 46(3): 799-806. Wang Chuang, Zhao Lang, Sun Qing, et al.Interface coating to regulate electric field at the interface of central conductor and insulation basin of UHV GIS spacer[J]. High Voltage Engineering, 2020, 46(3): 799-806. [21] 张芊, 韩旭涛, 张哲铭, 等. 固体绝缘内部气隙缺陷尺寸和位置对其局部放电特性的影响[J]. 高电压技术, 2019, 45(4): 1313-1322. Zhang Qian, Han Xutao, Zhang Zheming, et al.Influence of internal void defect dimension and position on partial discharge characteristics in the solid insulation[J]. High Voltage Engineering, 2019, 45(4): 1313-1322. [22] 肖淞, 张晓星, 周倩, 等. 不同类型自由金属微粒对SF6绝缘特性的影响[J]. 中国电机工程学报, 2018, 38(5): 1582-1591. Xiao Song, Zhang Xiaoxing, Zhou Qian, et al.Influence of different types of free metal particles on the properties of SF6 insulation[J]. Proceedings of the CSEE, 2018, 38(5): 1582-1591.
2022, Vol. 37 
