10 kV绝缘架空线路雷击断线仿真分析
CSTR:
作者:
作者单位:

(1.长沙理工大学电气与信息工程学院,湖南 长沙 410114;2.国网湖南省电力有限公司电力科学研究院,湖南 长沙 410004;3.国网湖南省电力有限公司检修公司,湖南 长沙 410004)

通讯作者:

杨廷方(1975—),男,博士,副教授,主要从事电力系统绝缘的研究;E?mail:2630544839@qq.com

中图分类号:

TM86

基金项目:

国家自然科学基金(51777015)


Simulation analysis of lightning stroke breaking of 10 kV insulated overhead transmission line
Author:
Affiliation:

(1.School of Electrical & Information Engineering, Changsha University of Science & Technology, Changsha 410114,China;2.Electric Power Science Research Institute,State Grid Hunan Electric Power Co.,Ltd.,Changsha 410007,China;3.Maintenance Company, State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China)

  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献 [14]
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    为研究10 kV架空绝缘线路雷击断线机理,基于COMSOL建立绝缘导线烧蚀模型,对导线受到雷电流和工频短路电流时的烧蚀状况进行仿真,然后建立导线受力模型,分析导线被烧蚀时的受力情况。根据仿真结果,雷电流仅在导线绝缘层留下一击穿孔;若不考虑外力影响,工频电弧能在1.3 s内将绝缘导线烧蚀熔断。绝缘导线的力学仿真结果显示,导线在烧蚀处的张力发生突变,并且受到线间电动力及电弧电磁推力的作用。结合理论分析得出雷击断线的主要原因是导线在热学及力学共同作用下发生塑性形变及脆性断裂,造成断线,断口介于塑性断裂和脆性断裂之间。该仿真研究可为10 kV架空绝缘导线的防雷提供参考。

    Abstract:

    In order to study the breaking mechanism of 10 kV overhead insulated lines by lightning, an ablation model of insulated conductors is established based on COMSOL, and the ablation status of the conductors when suffering lightning current and power frequency short?circuit current is simulated respectively. Then the force model of the conductor is established to analyze the conductor force when ablating. Simulation results indicate that, the lightning current only leads to one perforation on the conductor insulation layer. The power frequency arc can ablate and fuse the insulated wire in 1.3 s without considering the effect of external forces. The mechanical simulation results of the insulated conductor show that the tension of the conductor suffers abrupt changes at the ablation site, and the electromotive force between the wires and the electromagnetic thrust of the arc act on this site. Combined with theoretical analysis, it is concluded that the main reason for the line breakage caused by lightning is the combined action of heat and mechanics, which results in plastic deformation and brittle fracture. The simulation research provides a reference for lightning protection of 10 kV overhead insulated conductors.

    参考文献
    [1] 韩晋平,王晓丰,马心良,等.10 kV架空绝缘导线雷电过电压与防雷综合措施研究[J].高电压技术,2008,34(11):2395?2399. HAN Jinping,WANG Xiaofeng,MA Xinliang,et al.Research on comprehensive protections of 10 kV overhead insulated distribution lines from lightning[J].High Voltage Engineering,2008,34(11):2395?2399.
    [2] 张淼,汤心韵,周力行,等.电站10 kV连续倾斜架空线防雷配置改造[J].电力科学与技术学报,2019,34(2):169?174. ZHANG Miao,TANG Xinyun,ZHOU Lixing,et al.Power station 10 kV continuous tilt lighting protection reformation[J].Journal of Electric Power Science and Technology,2019,34(2):169?174.
    [3] 杨鑫,刘真,仇炜,等.10 kV架空绝缘导线防雷击断线用非穿刺式带间隙金属氧化物避雷器[J].电网技术,2018,42(9):3086?3092. YANG Xin,LIU Zhen,QIU Wei,et al.An MOA with series gap and non?piercing electrode for preventing lightning breakage of 10 kV overhead insulated lines[J].Power System Technology,2018,42(9):3086?3092.
    [4] 夏永强,冯海超,郑智勇.10 kV绝缘导线防断线用避雷器串联羊角间隙的距离确定方法[J].电力科学与技术学报,2019,34(1):136?141. XIA Yongqiang,FENG Haichao,ZHENG Zhiyong.Study on the distance determination method of angle gap in series with an anti?break lightning arrester for 10 kV insulated wires[J].Journal of Electric Power Science and Technology,2019,34(1):136?141.
    [5] 周斌,陈梦琦,郑海涯,等.谐振接地系统单相断线并坠地故障电压特征仿真分析[J].电力系统保护与控制,2021,49(17):93?100. ZHOU Bin,CHEN Mengqi,ZHENG Haiya,et al.Simulation analysis of voltage characteristics of a single?phase line?broken and grounding fault in a resonant grounded system[J].Power System Protection and Control,2021,49(17):93?100.
    [6] 李炜,杨廷方,张磊,等.配电线路避雷器分频式脱离器动作特性数值分析[J].中国电力,2022,55(1):189?195. LI Wei,YANG Tingfang,ZHANG Lei,et al.Numerical analysis of operating characteristics of frequency?dividing disconnectors for distribution line surge arresters[J].Electric Power,2022,55(1):189?195.
    [7] 戴志辉,陈思琦,李毅然,等.复杂环状柔直配电网单极断线故障特性分析[J].电工技术学报,2022,37(5):1229? 1241. DAI Zhihui,CHEN Siqi,LI Yiran,et al.Characteristic analysis of single?pole breakage fault in complex ring flexible DC distribution systems[J].Transactions of China Electrotechnical Society,2022,37(5):1229?1241.
    [8] 丛子涵,刘亚东,王鹏,等.10 kV配电网断线坠地故障地表电势分布及安全距离研究[J].高压电器,2022,58(4):101?107. CONG Zihan,LIU Yadong,WANG Peng,et al.Study on surface potential distribution and safety distance of disconnected grounding fault in 10 kV distribution network[J].High Voltage Apparatus,2022,58(4):101?107.
    [9] 王国锋.基于多重雷击防护的爆轰气流灭弧机理研究[J].电测与仪表,2021,58(1):84?90. WANG Guofeng.Research on explosion airflow arc?extinguish mechanism based on multiplelightning strike protection[J].Electrical Measurement &Instrumentation,2021,58(1):84?90.
    [10] 胡庆贤.穿孔等离子弧焊接温度场的有限元分析[D].济南:山东大学,2007. HU Qingxian.Finite element analysis of temperature fields in keyhole arc welding[D].Jinan:Shandong University,2017.
    [11] 付松林,何光华,徐骏,等.大段长高压电缆护层保护器暂态特性分析与参数优化设计[J].电网与清洁能源,2021,37(1):32?41. FU Songlin,HE Guanghua,XU Jun,et al.Transient characteristic analysis and parameter optimization of sheath protector for large?length high voltage cable[J].Power System and Clean Energy,2021,37(1):32?41.
    [12] 卢正飞,朱可凡,刘子俊,等.基于电压降落比较的高压架空线路断线保护原理[J].智慧电力,2021,49(1):9?13+55. LU Zhengfei,ZHU Kefan,LIU Zijun,et al.High?voltage overhead line breakage protection based on voltage drop comparison[J].Smart Power,2021,49(1):9?13+55.
    [13] 田君国,邓晶,李要建,等.自由燃烧电弧的磁流体动力学数值模拟[J].力学学报,2011,43(1):32?38. TIAN Junguo,DENG Jing,LI Yaoian,et al.Numerical simulation for a free?burning argon arc with MHD model[J].Chinese Journal of Theoretical and Applied Mechanics,2011,43(1):32?38.
    [14] 陈祝年.焊接工程师手册[M].北京:机械工业出版社,2004:352?356. CHEN Zhunian.Handbook for welding engineer[M].Beijing:China Machine Press,2004:352?356.
    相似文献
    引证文献
    网友评论
    网友评论
    分享到微博
    发 布
引用本文

胡新宇,汪新秀,杨廷方,等.10 kV绝缘架空线路雷击断线仿真分析[J].电力科学与技术学报,2023,38(2):161-167.
HU Xinyu, WAN Xinxiu, YANG Tingfang, et al. Simulation analysis of lightning stroke breaking of 10 kV insulated overhead transmission line[J]. Journal of Electric Power Science and Technology,2023,38(2):161-167.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 在线发布日期: 2023-06-29
文章二维码