摘要
导线长时间微风振动会导致导线断股,危及线路安全运行。针对这种现象,首先利用有限元仿真软件对LGJ150-25钢芯铝绞线进行建模;其次,对导线线股间接触磨损进行分析,评估接触裂纹的产生及扩展程度;最后,结合现有导线疲劳理论对导线断股机理展开分析。结果表明:导线内层钢芯主要作用在于承重,最内层及次内层钢芯接触处的磨损及裂纹产生速率远不及外层铝线股,最外层与次外层铝线股接触处在振幅小于0.1 mm时发生粘着磨损,大于0.1 mm时发生滑动磨损,当振幅大于1 mm时,在接触磨损及塑性变形共同作用下,线夹出口相邻层铝线股接触处将产生大量裂纹,同时裂纹急剧扩展加深,严重威胁输电线路的正常运行。
Long-time breeze vibration of transmission conductors will cause conductor strand breakage and even endanger safe operation of lines. Therefore, this paper firstly uses finite element simulation software for modeling LGforced aluminum conductor and then analyzes contact wearing between strands so as to evaluate generation of and extension degree. Finally ,it develops analysis mechanism on strand breakage by combining current conductor fatiguetheory. Results indicate that the main function of the inner steel core of the conductor is load bearing , thus generation rate of contact wearing and cracks of the inner and second inner steel cores is far less than that of outer strand.. Adhesive wear-ing will occur at contact points of the outermost layer and second outer layer aluminum strands when 0. 1 mm while skimming wearing occurs when amplitude is more than 0. 1 mm. In addition , when amplitude is more than 0. 1 mm and under the common action of contact wearing and plastic deformation , a large number of cracks will come into being at contact points of adjacent layer aluminum strands at the clamp exit. Meanwhile ,which seriously endanger normal operation of transmission liner.
出处
《广东电力》
2017年第4期108-114,共7页
Guangdong Electric Power
基金
陕西省重点科技创新团队计划(2014KCT-16)
陕西省工业科技攻关项目(2016GY-052)
关键词
微风振动
疲劳损伤
磨损
振幅
拉力载荷
breeze vibration
fatigue damage
wear
amplitude
tensile load
作者简介
司伟杰（1992）,男,山西朔州人.在读硕士研究生,研究方向为智能电网在线监测理论与关键技术.
黄新波（1975）,男,山东海阳人.教授,硕士生导师,博士（后）,从事智能电网输变电设备在线监测理论与关键技术、无线网络传感器等研究.
赵隆（987）,男,新疆石河子人.在职博士生,研究方向为智能电网在线监测理论与关键技术
