鼓型塔输电线路绝缘子破坏非线性动响应分析
|
摘要
为了研究绝缘子破坏失效对鼓型塔输电线路结构的受力影响,建立了输电线路耐张段的非线性耦合体系模型,通过导线找形非线性静力计算确定了耐张段的初始平衡状态。采用瞬态动力分析方法计算了绝缘子破坏失效危险工况下的输电线路耦合体系非线性动响应。分析结果表明,上横担一组绝缘子破坏失效后,破坏档未破坏端导线的张力超过了技术规程中的设计值;导线的跌落对破坏档未破坏端的上横担绝缘子受力有较大的影响,而对上横担铁塔杆件没有明显的影响;考虑杆塔断线荷载时,应增大两分裂以上导线纵向不平衡张力的下限值;在架空送电线路的设计中应该考虑绝缘子断裂的荷载工况。研究成果可为输电线路结构设计提供理论依据。
In order to study the dynamic response of high voltage transmission lines with drum type towers under mechanical fault,the non-linear dynamic finite element model of a domestic 500kV high voltage transmission line system was established.The reliability of coupling system model was verified by static calculation results.Transient dynamic analysis method was proposed to analyze the variation law of dynamic response under insulator rupture,and the dynamic response of structural elements next to the broken span was calculated.The results show that the peak tension in the conductor of upper crossarm at suspension point exceeds the design value.Insulator rupture has no effect on tower component of upper crossarm,but it has significant influence on insulator tension of upper crossarm.The lower limit of longitudinal unbalanced tension of two and more than two bundle conductor is relatively small.Insulator rupture should be taken into account in the design for overhead transmission lines.The research results can provide the theoretical base for the design of transmission line.
In order to study the dynamic response of high voltage transmission lines with drum type towers under mechanical fault,the non-linear dynamic finite element model of a domestic 500kV high voltage transmission line system was established.The reliability of coupling system model was verified by static calculation results.Transient dynamic analysis method was proposed to analyze the variation law of dynamic response under insulator rupture,and the dynamic response of structural elements next to the broken span was calculated.The results show that the peak tension in the conductor of upper crossarm at suspension point exceeds the design value.Insulator rupture has no effect on tower component of upper crossarm,but it has significant influence on insulator tension of upper crossarm.The lower limit of longitudinal unbalanced tension of two and more than two bundle conductor is relatively small.Insulator rupture should be taken into account in the design for overhead transmission lines.The research results can provide the theoretical base for the design of transmission line.
引文
[1]110~500 kV架空送电线路设计技术规程(DL/T5092-1999)[S].北京:中国电力出版社,1999.
[2]架空送电线路杆塔结构设计技术规定(DL/T 5154-2002)[S].北京:中国电力出版社,2002.
[3]张畅生,方子帆.高压输电线路合成绝缘子断裂机理研究[J].绝缘材料,2002,(1):27—28.
[4]谭章英,舒先民,马建国,等.500 kV葛双一回复合绝缘子芯棒裂断原因分析[J].电网技术,2001,25(1):67—68.
[5]Siddiqui F M A.Dynamic analysis and behavior ofelectric transmission line systems subjected to brokenwires[D].Pittsburgh,Pennsylvania:University ofPittsburgh,1981.
[6]McClure G,Tinawi R.Mathematical modeling ofthe transient response of electric transmission linesdue to conductor breakage[J].Computers andStructures,1987,26(1/2):41—56.
[7]Ostendorp M.Longitudinal load and cascadingfailure risk assessment[A].IEEE 8th InternationalConference[C].Palo Alto,CA,USA,1998:324-329.
[8]Kempner Jr L.Longitudinal impact loading onelectrical transmission line towers—A scale modelstudy[D].Portland:Portland State University,1997.
[9]梁枢果,朱继华,王力争.大跨越输电塔-线体系动力特性分析[J].地震工程与工程振动,2003,26(3):63—69.
[10]梁峰,李黎,尹鹏.大跨越输电塔-线体系数值分析模型的研究[J].振动与冲击,2007,26(2):61—65.
[11]赵滇生,金三爱.有限元模型对输电塔架结构动力特性分析的影响[J].特种结构,2004,21(3):8—11.
[12]石文龙,李宏男,贾连光.输电塔-导线耦联体系模型的振动台试验研究[J].工程力学,2006,23(5):89—93.
[13]陈亦.大跨越输电线路塔体系风振响应及控制[D].上海:同济大学,2003.
[14]刘磊,张光卿,袁长卿.杆系结构的高精度非线性分析[J].土木工程学报,2006,39(1):25—28.
[2]架空送电线路杆塔结构设计技术规定(DL/T 5154-2002)[S].北京:中国电力出版社,2002.
[3]张畅生,方子帆.高压输电线路合成绝缘子断裂机理研究[J].绝缘材料,2002,(1):27—28.
[4]谭章英,舒先民,马建国,等.500 kV葛双一回复合绝缘子芯棒裂断原因分析[J].电网技术,2001,25(1):67—68.
[5]Siddiqui F M A.Dynamic analysis and behavior ofelectric transmission line systems subjected to brokenwires[D].Pittsburgh,Pennsylvania:University ofPittsburgh,1981.
[6]McClure G,Tinawi R.Mathematical modeling ofthe transient response of electric transmission linesdue to conductor breakage[J].Computers andStructures,1987,26(1/2):41—56.
[7]Ostendorp M.Longitudinal load and cascadingfailure risk assessment[A].IEEE 8th InternationalConference[C].Palo Alto,CA,USA,1998:324-329.
[8]Kempner Jr L.Longitudinal impact loading onelectrical transmission line towers—A scale modelstudy[D].Portland:Portland State University,1997.
[9]梁枢果,朱继华,王力争.大跨越输电塔-线体系动力特性分析[J].地震工程与工程振动,2003,26(3):63—69.
[10]梁峰,李黎,尹鹏.大跨越输电塔-线体系数值分析模型的研究[J].振动与冲击,2007,26(2):61—65.
[11]赵滇生,金三爱.有限元模型对输电塔架结构动力特性分析的影响[J].特种结构,2004,21(3):8—11.
[12]石文龙,李宏男,贾连光.输电塔-导线耦联体系模型的振动台试验研究[J].工程力学,2006,23(5):89—93.
[13]陈亦.大跨越输电线路塔体系风振响应及控制[D].上海:同济大学,2003.
[14]刘磊,张光卿,袁长卿.杆系结构的高精度非线性分析[J].土木工程学报,2006,39(1):25—28.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心