覆冰脱落对输电塔线体系的动力冲击作用研究
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摘要
当架空输电线路发生输电线覆冰脱落时,将会对导线、地线、绝缘子、杆塔构件以及整个输电塔产生动力冲击作用。采用有限元数值模拟方法,建立四塔五线的塔线体系模型,模拟覆冰和脱冰现象,获得输电塔线体系的脱冰响应。计算结果表明:覆冰脱落使得邻近的导线产生低频舞动,绝缘子发生大幅摆动,输电塔部分杆件出现较大的峰值应力。同时使输电塔基底剪力、基底弯矩等大幅增加,并且越靠近脱冰档的杆塔,受到的冲击作用越大。
Ice-shedding from overhead transmission lines will result in the dynamic impact effects on the conductors,shield wires,isolators,members of the tower and the whole tower. Finite element method is employed to construct the tower-line model and simulate the phenomena of ice-accreting and ice-shedding. Then the responses of the tower-line system due to ice-shedding are obtained. Results from this study show that,ice-shedding from conductors causes low-frequency vibration of the conductors and large-amplitude oscillation of the isolators. Many members of the tower experience high peak impact stresses. At the same time,ice-shedding causes a significant increase of the base shears and base moments of the transmission tower. The impacting effects of the transmission-tower line system due to ice-shedding may increase with the decreasing distance between the tower and ice-shedding span.
Ice-shedding from overhead transmission lines will result in the dynamic impact effects on the conductors,shield wires,isolators,members of the tower and the whole tower. Finite element method is employed to construct the tower-line model and simulate the phenomena of ice-accreting and ice-shedding. Then the responses of the tower-line system due to ice-shedding are obtained. Results from this study show that,ice-shedding from conductors causes low-frequency vibration of the conductors and large-amplitude oscillation of the isolators. Many members of the tower experience high peak impact stresses. At the same time,ice-shedding causes a significant increase of the base shears and base moments of the transmission tower. The impacting effects of the transmission-tower line system due to ice-shedding may increase with the decreasing distance between the tower and ice-shedding span.
引文
[1]Gyakum J R,Roebber P J.The1998ice storm-analysis of a planetary-scale event[J].American Meteorological Society,2001,129(12):2983―2997.
[2]刘长根,肖江华,曹刚强.湖南电网50年一遇冰灾的特征、成因及应对措施[J].电力建设,2005,26(7):1―3.Liu Changgen,Xiao Jianghua,Cao Gangqiang.Characteristics,causes and countermeasures for ice disaster once for50years in Hunan power grid[J].Electric Power Construction,2005,26(7):1―3.(in Chinese)
[3]胡毅.电网大面积冰灾分析及对策探讨[J].高电压技术,2008,34(2):215―219.Hu Yi.Analysis and countermeasures discussion for large area icing accident on power grid[J].High Voltage Engineering,2008,34(2):215―219.(in Chinese)
[4]许建安.35kV―110kV输电线路设计[M].北京:中国水利水电出版社,2003.Xu Jian’an.Design of35kV―110kV transmission line[M].Beijing:China Water Power Press,2003.(in Chinese)
[5]杨靖波,李正,杨风利.2008年电网冰灾覆冰及倒塔特征分析[J].电网与水力发电进展,2008,24(4):4―8.Yang Jingbo,Li Zheng,Yang Fengli.Analysis of the features of covered ice and collapsed tower of transmission line snow and ice attacked in2008[J].Advances of Power System&Hydroelectric Engineering,2008,24(4):4―8.(in Chinese)
[6]DL/T5092-1999,110kV―500kV架空送电线路设计技术规程[S].北京:中国电力出版社,1999.DL/T5092-1999,Technical code for designing110kV―500kV overhead transmission line[S].Beijing:China Electric Power Press,1999.(in Chinese)
[7]DL/T5154-2002,架空送电线路杆塔结构设计技术规定[S].北京:中国电力出版社,2002.DL/T5154-2002,Technical regulation of design for tower and pole structures of overhead transmission line[S].Beijing:China Electric Power Press,2002.(in Chinese)
[8]Fekr M R,McClure G.Numerical modeling of the dynamic response of ice-shedding on electrical transmission lines[J].Atmosphere Research,1998,46:1―11.
[9]Jamaleddine A,McClure G,Rousselet J.Simulation of ice-shedding on electrical transmission lines using ADINA[J].Computer and Structures,1993,47(4-5):523―536.
[10]侯镭,王黎明,朱普轩.特高压线路覆冰脱落跳跃的动力计算[J].中国电机工程学报,2008,28(6):1―6.Hou Lei,Wang Liming,Zhu Puxuan.Dynamic behavior computation of ice shedding of UHV overhead transmission lines[J].Proceedings of the CSEE,2008,28(6):1―6.(in Chinese)
[11]ABAQUS6.4,Theory manual[M].Pawtucket,RI,USA:ABAQUS Inc.,2003.
[12]沈国辉,何运祥,孙炳楠.绝缘子断裂对大跨越输电塔的动力效应[J].浙江大学学报(工学版),2008,42(11):1990―1995.Shen Guohui,He Yunxiang,Sun Bingnan.Dynamic effect on long-span transmission line system due to insulator rupture[J].Journal of Zhejiang University(Engineering Science),2008,42(11):1990―1995.(in Chinese)
[13]沈国辉,孙炳楠,何运祥,叶尹,楼文娟.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212―217.Shen Guohui,Sun Bingnan,He Yunxiang,Ye Yin,Lou Wenjuan.Research on earthquake effect of long-span transmission tower-line system[J].Engineering Mechanics,2008,25(11):212―217.(in Chinese)
[14]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,2006.Shen Shizhao,Xu Chongbao,Zhao Chen.Design of cable structures[M].Beijing:China Architecture&Building Press,2006.(in Chinese)
[2]刘长根,肖江华,曹刚强.湖南电网50年一遇冰灾的特征、成因及应对措施[J].电力建设,2005,26(7):1―3.Liu Changgen,Xiao Jianghua,Cao Gangqiang.Characteristics,causes and countermeasures for ice disaster once for50years in Hunan power grid[J].Electric Power Construction,2005,26(7):1―3.(in Chinese)
[3]胡毅.电网大面积冰灾分析及对策探讨[J].高电压技术,2008,34(2):215―219.Hu Yi.Analysis and countermeasures discussion for large area icing accident on power grid[J].High Voltage Engineering,2008,34(2):215―219.(in Chinese)
[4]许建安.35kV―110kV输电线路设计[M].北京:中国水利水电出版社,2003.Xu Jian’an.Design of35kV―110kV transmission line[M].Beijing:China Water Power Press,2003.(in Chinese)
[5]杨靖波,李正,杨风利.2008年电网冰灾覆冰及倒塔特征分析[J].电网与水力发电进展,2008,24(4):4―8.Yang Jingbo,Li Zheng,Yang Fengli.Analysis of the features of covered ice and collapsed tower of transmission line snow and ice attacked in2008[J].Advances of Power System&Hydroelectric Engineering,2008,24(4):4―8.(in Chinese)
[6]DL/T5092-1999,110kV―500kV架空送电线路设计技术规程[S].北京:中国电力出版社,1999.DL/T5092-1999,Technical code for designing110kV―500kV overhead transmission line[S].Beijing:China Electric Power Press,1999.(in Chinese)
[7]DL/T5154-2002,架空送电线路杆塔结构设计技术规定[S].北京:中国电力出版社,2002.DL/T5154-2002,Technical regulation of design for tower and pole structures of overhead transmission line[S].Beijing:China Electric Power Press,2002.(in Chinese)
[8]Fekr M R,McClure G.Numerical modeling of the dynamic response of ice-shedding on electrical transmission lines[J].Atmosphere Research,1998,46:1―11.
[9]Jamaleddine A,McClure G,Rousselet J.Simulation of ice-shedding on electrical transmission lines using ADINA[J].Computer and Structures,1993,47(4-5):523―536.
[10]侯镭,王黎明,朱普轩.特高压线路覆冰脱落跳跃的动力计算[J].中国电机工程学报,2008,28(6):1―6.Hou Lei,Wang Liming,Zhu Puxuan.Dynamic behavior computation of ice shedding of UHV overhead transmission lines[J].Proceedings of the CSEE,2008,28(6):1―6.(in Chinese)
[11]ABAQUS6.4,Theory manual[M].Pawtucket,RI,USA:ABAQUS Inc.,2003.
[12]沈国辉,何运祥,孙炳楠.绝缘子断裂对大跨越输电塔的动力效应[J].浙江大学学报(工学版),2008,42(11):1990―1995.Shen Guohui,He Yunxiang,Sun Bingnan.Dynamic effect on long-span transmission line system due to insulator rupture[J].Journal of Zhejiang University(Engineering Science),2008,42(11):1990―1995.(in Chinese)
[13]沈国辉,孙炳楠,何运祥,叶尹,楼文娟.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212―217.Shen Guohui,Sun Bingnan,He Yunxiang,Ye Yin,Lou Wenjuan.Research on earthquake effect of long-span transmission tower-line system[J].Engineering Mechanics,2008,25(11):212―217.(in Chinese)
[14]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,2006.Shen Shizhao,Xu Chongbao,Zhao Chen.Design of cable structures[M].Beijing:China Architecture&Building Press,2006.(in Chinese)
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