Analysis on the DC Discharge Path of Ice-Covered Disc Type Suspension Insulators under Natural Conditions
Shu Lichun1, Liu Yanqing1, Jiang Xingliang1, Hu Qin1, Zhou Longwu2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. Electric Power Research Institute of State Grid Jiangxi Electric Power Co. Ltd Nanchang 330096 China
Abstract Ice-covered insulator flashover seriously affects the safe operation of transmission lines. Studying the discharge path is helpful to improve the discharge theory of ice-covered insulators. However, existing researches lack a systematic analysis on the discharge path. For this reason, this paper carried out DC flashover tests of ice-covered disc type suspension insulators under natural conditions. The whole discharge process and the discharge characteristics were obtained. The results show that the arc generally develops from both ends to the middle during the glaze flashover process, while arc darkening or extinguishing may occur many times for mixed-phase ice. The flashover paths have great dispersion. The arc exists in segments with a random arc length and arc location. Moreover, the ice pattern and wind have a great influence on the discharge path. For glaze icing, the heavier the icing degree, the longer the icicle length is, and the easier the arc is bridged. The arc will drift and deform under the action of wind force, leading to the arc gathering on the leeward side.
Shu Lichun,Liu Yanqing,Jiang Xingliang等. Analysis on the DC Discharge Path of Ice-Covered Disc Type Suspension Insulators under Natural Conditions[J]. Transactions of China Electrotechnical Society, 2021, 36(8): 1726-1733.
[1] 蒋兴良, 易辉. 输电线路覆冰及防护[M]. 北京: 中国电力出版社, 2002. [2] Farzaneh M, Chisholm W A.50 years in icing performance of outdoor insulators[J]. IEEE Electrical Insulation Magazine, 2014, 30(1): 14-24. [3] Farzaneh M, Zhang J, Chaarani R, et al.Critical conditions of AC arc propagation on ice surfaces[C]// Conference Record of the 2000 IEEE International Symposium on Electrical Insulation, Anaheim, CA, USA, 2000: 211-215. [4] Farzaneh M.Insulator flashover under icing con- ditions[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2014, 21(5): 1997-2011. [5] Hu Qin, Wang Shijing, Shu Lichun, et al.Influence of shed configuration on icing characteristics and flashover performance of 220kV composite insu- lators[J]. IEEE Transactions on Dielectrics & Elec- trical Insulation, 2016, 23(1): 319-330. [6] 张志劲, 蒋兴良, 胡建林, 等. 间插布置方式对交流绝缘子串覆冰特性影响[J]. 电工技术学报, 2011, 26(1): 174-180. Zhang Zhijin, Jiang Xingliang, Hu Jianlin, et al.Influence of the type of insulators connected with alternately large and small diameter sheds on AC icing flashover performance[J]. Transactions of China Electrotechnical Society, 2011, 26(1): 174-180. [7] Jiang Xingliang, Wang Shaohua, Zhang Zhijin, et al.Study on AC flashover performance and discharge process of polluted and iced IEC standard suspension insulator string[J]. IEEE Transactions on Power Delivery, 2007, 22(1): 472-480. [8] 蒋兴良, 毕聪来, 王涵, 等. 倒T型布置对绝缘子串覆冰及其交流闪络特性的影响[J]. 电工技术学报, 2019, 34(17): 3713-3720. Jiang Xingliang, Bi Conglai, Wang Han, et al.Influence of T-type arrangement on icing process and AC flashover performance of insulator strings[J]. Transactions of China Electrotechnical Society, 2019, 34(17): 3713-3720. [9] Farokhi S, Farzaneh M, Fofana I, et al.Charac- teristics of a positive DC arc formed over an ice surface[C]//2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena, Virginia Beach, VA, USA, 2009: 454-457. [10] Shu Lichun, Shang Yu, Jiang Xingliang, et al.Com- parison between AC and DC flashover performance and discharge process of ice-covered insulators under the conditions of low air pressure and pollution[J]. IET Generation, Transmission and Distribution, 2012, 6(9): 884-892. [11] 唐志国, 蒋佟佟, 于智强, 等. 高频电流法用于电容器出厂局部放电检测的研究[J]. 电机与控制学报, 2019, 23(3): 22-29, 37. Tang Zhiguo, Jiang Dongdong, Yu Zhiqiang, et al.High frequency current for the factory inspection of capacitor PD detection[J]. Electric Machines and control, 2019, 23(3): 22-29, 37. [12] 胡多, 任成燕, 孔飞, 等. 表面粗糙度对聚合物材料真空沿面闪络特性的影响[J]. 电工技术学报, 2019, 34(16): 3512-3521. Hu Duo, Ren Chengyan, Kong Fei, et al.Influence of the roughness on surface flashover of polymer materials in vacuum[J]. Transactions of China Elec- trotechnical Society, 2019, 34(16): 3512-3521. [13] 张迅, 曾华荣, 田承越, 等. 大气压等离子体制备超疏水表面及其防冰抑霜研究[J]. 电工技术学报, 2019, 34(24): 5289-5296. Zhang Xun, Zeng Huarong, Tian Chengyue, et al.Super-hydrophobic surface prepared by atmospheric- pressure plasma and its anti-icing, anti-frosting performance[J]. Transactions of China Electro- technical Society, 2019, 34(24): 5289-5296. [14] Hu Jianlin, Jiang Xingliang, Yin Fanghui, et al.DC flashover performance of ice-covered composite insulators with parallel air gaps[J]. Energies, 2015, 8(6): 4983-4999. [15] 郭裕钧, 蒋兴良, 孟志高, 等. 带并联间隙地线复合绝缘子直流覆冰闪络特性[J]. 电工技术学报, 2017, 32(14): 252-258. Guo Yujun, Jiang Xingliang, Meng Zhigao, et al.DC icing flashover performance of composite insulators with a parallel air gap used for overhead ground wire insulation[J]. Transactions of China Electrotechnical Society, 2017, 32(14): 252-258. [16] Hu Qin, Yuan Wei, Shu Lichun, et al.Effects of electric field distribution on icing and flashover performance of 220kV composite insulators[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2014, 21(5): 2181-2189. [17] IEEE Std4-1978 IEEE standard techniques for high voltage testing[S]. New York: IEEE, 1995. [18] 蒋兴良, 郭思华, 胡建林, 等. 不同覆雪形态对悬式绝缘子直流负极性闪络特性的影响[J]. 电工技术学报, 2018, 33(2): 451-458. Jiang Xingliang, Guo Sihua, Hu Jianlin, et al.Influence of snow accretion with different shape on negative DC flashover characteristics of suspension insulators[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 451-458. [19] 蒋兴良, 董冰冰, 张志劲, 等. 绝缘子覆冰闪络研究进展[J]. 高电压技术, 2014, 40(2): 317-335. Jiang Xingliang, Dong Bingbing, Zhang Zhijin, et al.Research and development on flashover of ice- covered insulators[J]. High Voltage Engineering, 2014, 40(2): 317-335. [20] Sima Wenxia, Yang Qing, Sun Caixin, et al.Potential and electric-field calculation along an ice-covered composite insulator with finite-element method[J]. IEE Proceedings-Generation, Transmission and Distri- bution, 2006, 153(3): 343-349. [21] 舒立春, 王鹏浩, 徐宁, 等. 基于改进时变电弧方程的直流覆冰闪络动态电路模型研究[J]. 电工技术学报, 2018, 33(19): 189-196. Shu Lichun, Wang Penghao, Xu Ning, et al.Study on dynamic circuit model of DC icing flashover based on improved time-varying arc equation[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(19): 189-196. [22] Shu Lichun, Liu Yanqing, Jiang Xingliang, et al.Three-dimensional electric field simulation and flashover path analysis of ice-covered suspension insulators[J]. IET High Voltage, 2019, DOI: 10.1049/ hve.2019.0095.
2021, Vol. 36 
