基于有限元分析的架空地线与预绞丝接触端面暂态温升计算
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摘要
架空地线断线事故的发生,严重影响电网的安全稳定运行,分析其断线机理对指导地线悬垂串的断线防范措施具有重要的意义。为此,对架空地线悬垂串的发热瓶颈点——地线与预绞丝接触端面为研究对象,建立地线与预绞丝接触端面的三维电热仿真模型,分别计算工频短路电流和雷电流作用下的接触端面暂态温度分布,并结合仿真结果分析地线断线原因。研究结果表明:对于接触端面,温度最高点位于地线与预绞丝的接触部位;雷电流和工频短路电流的热效应均能造成接触端面高温甚至断线,但是在实际中高幅值的雷电流出现概率小,运行中地线断线事故主要是由工频短路电流作用引起的。
Occurrence of ground wire breakage accident seriously affects safe and stable operation of the power grid. Thus,it is of great significance to analyze mechanism of ground wire breakage to conduct precautions of breakage in the ground wire suspension string. Therefore,this paper takes the contact surface between the ground wire and armor rod which is the heating bottle neck of the ground wire suspension string as a research object and establishes a three-dimensional electrothermal simulation model. By respectively calculating transient temperature distribution of the contact surface under effects of power frequency short-circuit current and lightning current and combining simulation results,it analyzes reasons for ground wire breakage. The results indicate that for the contact surface,the highest temperature point is at the contact point between the ground wire and armor rod,and high temperature of the contact surface or even breakage could be caused by thermal effect of power frequency short-circuit current and lightning current respectively. However,as high amplitude lightning current is less likely to occur in reality,the breakage accident of the ground wire is mainly caused by the effect of power frequency short-circuit current in operation.
Occurrence of ground wire breakage accident seriously affects safe and stable operation of the power grid. Thus,it is of great significance to analyze mechanism of ground wire breakage to conduct precautions of breakage in the ground wire suspension string. Therefore,this paper takes the contact surface between the ground wire and armor rod which is the heating bottle neck of the ground wire suspension string as a research object and establishes a three-dimensional electrothermal simulation model. By respectively calculating transient temperature distribution of the contact surface under effects of power frequency short-circuit current and lightning current and combining simulation results,it analyzes reasons for ground wire breakage. The results indicate that for the contact surface,the highest temperature point is at the contact point between the ground wire and armor rod,and high temperature of the contact surface or even breakage could be caused by thermal effect of power frequency short-circuit current and lightning current respectively. However,as high amplitude lightning current is less likely to occur in reality,the breakage accident of the ground wire is mainly caused by the effect of power frequency short-circuit current in operation.
引文
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[16]崔弘,夏成军,杜天苍,等. OPGW雷击破坏的数值分析及结构优化[J].高压电器,2010,46(6):50-54,59.CUI Hong,XIA Chengjun,DU Tiancang,et al. Numerical analysis of OPGW damage by lightning and structural optimization[J]. High Voltage Apparatus,2010,46(6):50-54,59.
[17]邓红雷,李述文,戴栋.基于层次化、差异化的架空输电线路雷击风险评估[J].电力系统保护与控制,2016,44(4):69-75.DENG Honglei,LI Shuw en,DAI Dong. Lightning risk assessment of overhead transmission line based on hierarchical and differentiation[J]. Pow er System Protection and Control,2016,44(4):69-75.
[18]马仪,黄然,申元,等.输电线路雷击点与闪络点不一致的辨识与定位[J].电力系统保护与控制,2016,44(16):63-71.M A Yi,HUANG Ran,SHEN Yuan,et al. Inconsistent identification and location of transmission line lightning point and flashover point[J]. Pow er System Protection and Control,2016,44(16):63-71.
[19] ORIANO B,GABRIELLA C,GIOVANNI F. Numerical analysis of heating transient of electric contacts under short-circuit conditions[J]. IEEE Trans. on Compon., Hybrids, M anuf.Technol.,1993,16(5):563-570.
[20] YB/T 5004—2012,镀锌钢绞线[S].
[21] YB/T 124—2017,铝包钢绞线[S].
[22] LI Xingwen,CHEN Degui. 3-D finite element analysis and experimental investigation of electrodynamic repulsion force in molded case circuit breakers[J]. IEEE Trans. on Compon. Packag. M anuf. Technol.,2005,28(4):877-883.
[23]徐研,王鹏宇,刘毅刚,等.玻璃钢保护壳对电缆接头热场影响的实验分析[J].广东电力,2016,29(9):78-83.XU Yan,WANG Pengyu,LIU Yigang,et al. Experiment analysis on influence of glass fiber reinforced plastic protection shell on thermal field of cable joint[J]. Guangdong Electric Pow er,2016,29(9):78-83.
[24]刘刚,王鹏宇,王振华,等.基于ANSYS的高压交流电缆接头载流量确定方法[J].华南理工大学学报,2017,45(4):22-29.LIU Gang,WANG Pengyu,WANG Zhenhua,et al. Determination method of current-carrying capacity of HVAC cable joint based on ANSYS[J]. Journal of South China University of Technology,2017,45(4):22-29.
[25] PAULKE J, WEICHERT H,STEINHAEUSER P. Thermal simulation of sw itchgear[J]. IEEE Trans. on Compon. Packag.Technol.,2002,25(3):434-439.
[26]孙国霞,舒乃秋,吴晓文,等.基于多物理场耦合的气体绝缘母线触头接触温升有限元计算[J].电工技术学报,2013,28(2):408-413.SUN Guoxia, SHU Naiqiu, WU Xiaow en, et al. Finite element analysis of contact temperature rise in gas insulated busbars based on coupled multi-physics[J]. Transactions of China Electrotechnical Society,2013,28(2):408-413.
[27]梁曦东,陈昌渔,周远翔.高电压工程[M].北京:清华大学出版社,2003.
[28]王永明,倪孟华,路永玲,等. 220 kV输电线路工频短路电流分布研究[J].武汉大学学报,2011,44(3):383-387.WANG Yongming, NI M enghua, LU Yongling, et al. Research on distribution of w orking frequency short-circuit current of 220 kV transmission lines[J]. Engineering Journal of Wuhan University,2011,44(3):383-387.
[2] KARABAY S,GUVEN E A,ERTURK A T. Enhancement on Al-M g-Si alloys against failure due to lightning arc occurred in energy transmission lines[J]. Eng. Fail. Anal, 2013, 31:153-160.
[3] KARABAY S. Modification of conductive material AA6101 of OPGW conductors against lightning strikes[J]. Strojniski Vestnik J. M ech. Eng.,2013,59:451-461.
[4] IWATA M,OHTAKA T,GODA Y. Melting and breaking of 80mm2OPGWs by DC arc discharge simulating lightning strike[C]//2016 33rd International Conference on Lightning Protection(ICLP). Estoril,Portugal:IEEE Press,2016:25-30.
[5]彭向阳,金亮,王锐,等. 220 kV同塔线路雷击同跳故障分析及防治措施[J].电瓷避雷器,2018(4):65-71.PENG Xiangyang,JIN Liang,WANG Rui,et al. Simultaneous lightning trip-out failure analysis and prevention measures of 220k V multi-circuit pow er transmission line on the same tow er[J]. Insulators and Surge Arresters,2018(4):65-71.
[6]李勋,黄荣辉,伍国兴,等.输电杆塔雷击接地模型对附近管道运行安全影响研究[J].智慧电力,2017,45(10):25-30.LI Xun,HUANG Ronghui, WU Guoxing, et al. Research of lightning grounding model of transmission tow er and its influence on safety operation of nearby pipeline[J]. Smart Pow er,2017,45(10):25-30.
[7]周学明,李健,朱昌成,等.输电线路架空地线断线原因分析及其防范措施[J].湖北电力,2016,40(1):11-14.ZHOU Xueming,LI Jian,ZHU Changcheng,et al. Analysis of overhead earth w ire breakage and prevention measure[J]. Hubei Electric Pow er,2016,40(1):11-14.
[8]郭德明,刘刚,漆海霞,等.缠绕预绞丝的地线悬垂串温度分布实验分析[J].广东电力,2017,30(10):1-5.GUO Deming,LIU Gang,QI Haixia,et al. Experimental analysis on temperature distribution of ground w ire suspension string w ith w inding preformed armor rod[J]. Guangdong Electric Power,2017,30(10):1-5.
[9] LIU Gang,LI Yang,GUO Deming,et al. Experimental investigation on the breakage in earth w ire suspension string w ith w inding preformed armor rods[C]//2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Pow er Systems. M ilan,Italy:IEEE Press,2017:1-5.
[10] LIU Gang,GUO Deming,WANG Pengyu,et al. Calculation of equivalent resistance for ground w ires tw ined w ith armor rods in contact terminals[J]. Energies,2018,11(4):737-742.
[11] LI Xingwen,QU Jianyu,WANG Qian,et al. Numerical and experimental study of the short-time w ithstand current capability for air circuit breaker[J]. IEEE Trans. on Pow er Deliv,2013,28(4):2610-2615.
[12] CHEN Kena,CHE Degui,LI Xingwen,et al. A method to analyze the short-time w ithstand current capability for air circuit breaker[C]//2011 1st International Conference on Electric Power Equipment-Sw itching Technology. Xi'an, China:IEEE Press,2011:182-186.
[13] GUAN Xiangyu,SHU Naiqiu,KANG Bing,et al. Multiphysics analysis of plug-in connector under steady and short circuit conditions[J]. IEEE Trans. on Compon. Packag. M anuf.Technol.,2015,5(3):320-327.
[14]姚学玲,郭灿阳,孙晋茹,等.碳纤维复合材料在雷电流作用下的损伤仿真与试验[J].高电压技术,2017,43(5):1400-1408.YAO Xueling,GUO Canyang,SUN Jinru,et al. Damage simulation and experiment of carbon fiber composites subjected to lightning current[J]. High Voltage Engineering, 2017, 43(5):1400-1408.
[15]刘志强.雷电环境下复合材料层合板电-磁-热-结构耦合效应研究[D].西安:西北工业大学,2014.
[16]崔弘,夏成军,杜天苍,等. OPGW雷击破坏的数值分析及结构优化[J].高压电器,2010,46(6):50-54,59.CUI Hong,XIA Chengjun,DU Tiancang,et al. Numerical analysis of OPGW damage by lightning and structural optimization[J]. High Voltage Apparatus,2010,46(6):50-54,59.
[17]邓红雷,李述文,戴栋.基于层次化、差异化的架空输电线路雷击风险评估[J].电力系统保护与控制,2016,44(4):69-75.DENG Honglei,LI Shuw en,DAI Dong. Lightning risk assessment of overhead transmission line based on hierarchical and differentiation[J]. Pow er System Protection and Control,2016,44(4):69-75.
[18]马仪,黄然,申元,等.输电线路雷击点与闪络点不一致的辨识与定位[J].电力系统保护与控制,2016,44(16):63-71.M A Yi,HUANG Ran,SHEN Yuan,et al. Inconsistent identification and location of transmission line lightning point and flashover point[J]. Pow er System Protection and Control,2016,44(16):63-71.
[19] ORIANO B,GABRIELLA C,GIOVANNI F. Numerical analysis of heating transient of electric contacts under short-circuit conditions[J]. IEEE Trans. on Compon., Hybrids, M anuf.Technol.,1993,16(5):563-570.
[20] YB/T 5004—2012,镀锌钢绞线[S].
[21] YB/T 124—2017,铝包钢绞线[S].
[22] LI Xingwen,CHEN Degui. 3-D finite element analysis and experimental investigation of electrodynamic repulsion force in molded case circuit breakers[J]. IEEE Trans. on Compon. Packag. M anuf. Technol.,2005,28(4):877-883.
[23]徐研,王鹏宇,刘毅刚,等.玻璃钢保护壳对电缆接头热场影响的实验分析[J].广东电力,2016,29(9):78-83.XU Yan,WANG Pengyu,LIU Yigang,et al. Experiment analysis on influence of glass fiber reinforced plastic protection shell on thermal field of cable joint[J]. Guangdong Electric Pow er,2016,29(9):78-83.
[24]刘刚,王鹏宇,王振华,等.基于ANSYS的高压交流电缆接头载流量确定方法[J].华南理工大学学报,2017,45(4):22-29.LIU Gang,WANG Pengyu,WANG Zhenhua,et al. Determination method of current-carrying capacity of HVAC cable joint based on ANSYS[J]. Journal of South China University of Technology,2017,45(4):22-29.
[25] PAULKE J, WEICHERT H,STEINHAEUSER P. Thermal simulation of sw itchgear[J]. IEEE Trans. on Compon. Packag.Technol.,2002,25(3):434-439.
[26]孙国霞,舒乃秋,吴晓文,等.基于多物理场耦合的气体绝缘母线触头接触温升有限元计算[J].电工技术学报,2013,28(2):408-413.SUN Guoxia, SHU Naiqiu, WU Xiaow en, et al. Finite element analysis of contact temperature rise in gas insulated busbars based on coupled multi-physics[J]. Transactions of China Electrotechnical Society,2013,28(2):408-413.
[27]梁曦东,陈昌渔,周远翔.高电压工程[M].北京:清华大学出版社,2003.
[28]王永明,倪孟华,路永玲,等. 220 kV输电线路工频短路电流分布研究[J].武汉大学学报,2011,44(3):383-387.WANG Yongming, NI M enghua, LU Yongling, et al. Research on distribution of w orking frequency short-circuit current of 220 kV transmission lines[J]. Engineering Journal of Wuhan University,2011,44(3):383-387.