基于ANSYS仿真的架空线路弧垂监测预警技术
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摘要
针对传统的架空输电线路人工巡线方法只能对架空输电线路下的树障点进行高度测量统计,难以对树障点对应的架空线路对应弧垂值进行动态测量的问题,提出一种基于ANSYS有限元温度场仿真的架空线路弧垂监测预警技术。针对LGJ-300/25型导线,在ANSYS中建立其有限元模型,通过对导线在不同环境条件下的温度场进行仿真,得出该导线在不同运行状态下的径向分布温度。然后使用弧垂计算的悬链线法计算出实时状态下对应树障点的弧垂值,再依据人工巡线测得的树障点树高,求出该树障点与导线的净空距离。运行人员根据此净空距离判断其安全等级,根据实际运行情况,对弧垂实现监测以及故障预警,有利于提高架空输电线路运行的安全性。
The traditional manual inspection method of overhead transmission lines can only measure and count the height of the tree barrier points under the overhead transmission lines,and it is difficult to make a dynamic measurement of the corresponding arc-sag value of the overhead line corresponding to the tree barrier point. So aiming at these problems,an overhead line arc-sag monitoring and early-warning technology based on ANSYS finite element temperature field simulation is proposed. For the LGJ-300/25 type conductor,its finite element model is established in ANSYS. By simulating the temperature field of the conductor under different environmental conditions,the radial distribution temperature of the conductor under different operating conditions is obtained. Then the catenary method calculated by the arc-sag is used to calculate the arc-sag value of the corresponding tree barrier point in real-time state,and the clearance distance between the tree barrier point and the conductor is calculated according to the height of the tree barrier point measured by the manual patrol inspection line. The operator judges the safety level according to the obtained clearance distance,and actual operation situation which is beneficial to improve the safety of the operation of the overhead transmission line.
The traditional manual inspection method of overhead transmission lines can only measure and count the height of the tree barrier points under the overhead transmission lines,and it is difficult to make a dynamic measurement of the corresponding arc-sag value of the overhead line corresponding to the tree barrier point. So aiming at these problems,an overhead line arc-sag monitoring and early-warning technology based on ANSYS finite element temperature field simulation is proposed. For the LGJ-300/25 type conductor,its finite element model is established in ANSYS. By simulating the temperature field of the conductor under different environmental conditions,the radial distribution temperature of the conductor under different operating conditions is obtained. Then the catenary method calculated by the arc-sag is used to calculate the arc-sag value of the corresponding tree barrier point in real-time state,and the clearance distance between the tree barrier point and the conductor is calculated according to the height of the tree barrier point measured by the manual patrol inspection line. The operator judges the safety level according to the obtained clearance distance,and actual operation situation which is beneficial to improve the safety of the operation of the overhead transmission line.
引文
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[14]王春江.电线电缆手册[M].北京:机械工业出版社,2014.WANG Chunjiang. Wire and cable manual[M]. Beijing:Mechanical Industry Press,2014.
[15]刘长青,张学哲,刘胜春,等.提高导线运行允许温度若干问题的探讨[J].电力设备,2004,5(8):44-47.LIU Changqing,ZHANG Xuezhe,LIU Shengchun,et al. Discussion on several problems of increasing allowable temperature of conductor operation[J]. Electric Power Equipment,2004,5(8):44-47.
[2]叶自强,朱和平.提高输电线路输送容量的研究[J].电网技术,2006,30(s1):264-269.YE Ziqiang,ZHU Heping. Research on improving the transmission capacity of transmission lines[J]. Power System Technology,2006,30(s1):264-269.
[3]陈思明.动态环境下输电线路弧垂监测模型研究[D].成都:电子科技大学,2013.CHEN Siming. Research on sag monitoring model of transmission line in dynamic environment[D]. Chengdu:University of Electronic Science and Technology of China,2013.
[4]徐青松,季洪献,王孟龙.输电线路弧垂的实时监测[J].高电压技术,2007,33(7):206-209.XU Qingsong,JI Hongxian,WANG Menglong. Real-time monitoring of transmission line sag[J]. High Voltage Engineering,2007,33(7):206-209.
[5]王彪,张艳军.红外测温技术在架空输电线路故障诊断中的应用[J].河北电力技术,2014,33(4):18-20.WANG Biao,ZHANG Yanjun. Application of infrared temperature measurement technology in fault diagnosis of overhead transmission lines[J]. Hebei Electric Power,2014,33(4):18-20.
[6]林玉章.高压架空输电线路载流量和温度计算[J].南方电网技术,2012,6(4):23-27.LIN Yuzhang. Calculation of current carrying capacity and temperature of high voltage overhead transmission lines[J]. China Southern Power Grid Technology,2012,6(4):23-27.
[7]刘刚,林杰,陈荣锋,等.架空线路载流量的导线温度测量方法研究[J].电测与仪表,2013,50(4):41-44.LIU Gang,LIN Jie,CHEN Rongfeng,et al. Research on measurement method of conductor temperature of overhead line current carrying capacity[J]. Electric Measuring&Instrumentation,2013,50(4):41-44.
[8]周华敏,肖凯,陈志为,等.运营环境下输电导线径向温度分布模拟[J].厦门大学学报(自然版),2016,55(1):137-143.ZHOU Huamin,XIAO Kai,CHEN Zhiwei,et al. Simulation of radial temperature distribution of transmission conductors in operating environment[J]. Journal of Xiamen University(Natural Science),2016,55(1):137-143.
[9]肖凯,刘永斗,李鹏云,等.架空导线径向温度场的数值模拟[J].武汉理工大学学报,2015,37(4):65-70.XIAO Kai,LIU Yongdou,LI Pengyun,et al. Numerical simulation of radial temperature field of overhead conductors[J]. Journal of Wuhan University of Technology,2015,37(4):65-70.
[10]周兴扬,沈泓,胡天硕,等.基于悬链线公式的输电线路弧垂三维模拟及安全距离校验[J].电气工程学报,2015,10(12):44-49.ZHOU Xingyang,SHEN Hong,HU Tianshuo,et al. Three-dimensional simulation of transmission line sag and safety distance verification based on catenary formula[J]. Chinese Journal of Electrical Engineering,2015,10(12):44-49.
[11]姜广智.悬链线方程在高压架空输电线路中的应用[J].科学技术与工程,2008,8(8):1960-1964.JIANG Guangzhi. Application of catenary equation in high voltage overhead transmission lines[J]. Science Technology and Engineering,2008,8(8):1960-1964.
[12]水利电力部西北电力设计院.电力工程电气设计手册[M].北京:中国电力出版社,1989.Ministry of Water Conservancy and Electric Power Northwest Electric Power Design Institute. Electrical design manual for electric power engineering[M]. Beijing:China Electric Power Press,1989.
[13]邵天晓.架空送电线路的电线力学计算[M].北京:水利电力出版社,1987.SHAO Tianxiao. Mechanical calculation of electric wires for overhead transmission lines[M]. Beijing:Water Resources and Electric Power Press,1987.
[14]王春江.电线电缆手册[M].北京:机械工业出版社,2014.WANG Chunjiang. Wire and cable manual[M]. Beijing:Mechanical Industry Press,2014.
[15]刘长青,张学哲,刘胜春,等.提高导线运行允许温度若干问题的探讨[J].电力设备,2004,5(8):44-47.LIU Changqing,ZHANG Xuezhe,LIU Shengchun,et al. Discussion on several problems of increasing allowable temperature of conductor operation[J]. Electric Power Equipment,2004,5(8):44-47.