软母线连接电气设备地震模拟振动台试验研究
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摘要
为研究地震作用下变电站软母线连接电气设备间的动力相互作用,进行实际设备与软母线连接体系的地震模拟振动台试验。通过对设备间无软母线以及连接不同松弛度软母线的设备动力响应的比较分析,得出软母线对电气设备的影响规律,验证了理论计算模型的正确性。在软母线松弛度较大时,软母线连接电气设备体系的响应与单体设备的响应差别不大。在软母线松弛度较小时,软母线与电气设备间产生了非常明显的相互作用,且这种相互作用在地震动幅值较小时,会对设备产生约束作用;在地震动幅值较大时,由于剧烈的动力效应,母线内会产生较大的张力,对设备产生不利的影响。在进行变电站软母线连接设备的抗震设计中,需要考虑强震作用下母线的影响。
In order to study the dynamic interaction of substation equipment interconnected by flexible buses subjected to earthquakes,a shake table test on a full scale model was carried out.After comparing the seismic behavior of the independent equipment with that of the equipment interconnected by the flexible buses of different slackness,the dynamic interaction mechanism of the coupling system was given and the theoretical model for analyzing the seismic interaction was also verified.When the slackness of the flexible bus is large,the difference of the seismic response between the independent equipment and the equipment interconnected by flexible buses is small.On the contrary,when the slackness of flexible bus is small,the interaction between substation equipment and flexible buses is large.An impact tension will happen in the flexible bus when the coupling system is subjected to severe ground motion,which will have a negative influence on the equipment.Therefore,the dynamic interaction of the equipment interconnected by flexible buses should be considered in the seismic design of substation equipment.
In order to study the dynamic interaction of substation equipment interconnected by flexible buses subjected to earthquakes,a shake table test on a full scale model was carried out.After comparing the seismic behavior of the independent equipment with that of the equipment interconnected by the flexible buses of different slackness,the dynamic interaction mechanism of the coupling system was given and the theoretical model for analyzing the seismic interaction was also verified.When the slackness of the flexible bus is large,the difference of the seismic response between the independent equipment and the equipment interconnected by flexible buses is small.On the contrary,when the slackness of flexible bus is small,the interaction between substation equipment and flexible buses is large.An impact tension will happen in the flexible bus when the coupling system is subjected to severe ground motion,which will have a negative influence on the equipment.Therefore,the dynamic interaction of the equipment interconnected by flexible buses should be considered in the seismic design of substation equipment.
引文
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[2]谢强.5.12汶川大地震电力系统震害调查初步报告[R].上海:同济大学生命线工程研究所,2008.Xie Qiang.Preliminary investigation on damage of electric power system during May 12th Wenchuan earthquake[R].Shanghai:Lifeline Engineering Institute,Tongji University,2008(in Chinese).
[3]谢强,王亚非,魏思航.汶川地震中变电站开关设备破坏机理[J].沈阳建筑大学学报,2009,25(6):1050-1057.Xie Qiang,Wang Yafei,Wei Sihang.Seismic failure analysis on substation equipment interconnected by flexible conductor[J].Journal of Shenyang Jianzhu University,2009,30(4):10-14(in Chinese).
[4]谢强,王亚非.软母线连接变电站电气设备地震响应分析[J].中国电机工程学报,2010,30(34):86-92.Xie Qiang,Wang Yafei.Seismic response analysis on substation equipment interconnected by flexible bus[J].Proceedings of the CSEE,2010,30(34):86-92(in Chinese).
[5]Dastous J B,Pierre J R.Experimental inveatigation on the dynamic of flexible conductors between substation equipment during an earthquake[J].IEEE Transactions on Power Delivery,1996,11(2):801-806.
[6]Dastous J B,Filiatrault A,Pierre J R.Estimation of displacement at interconnection points of substation equipment subjected to earthquakes[J].IEEE Transactions on Power Delivery,2004,19(2):618-628.
[7]Dastous J B,Paquin J Y.Testing and development of alternative flexible bus geometries for interconnected substation equipment subjected to earthquakes[J].IEEE Transactions on Power Delivery,2003,18(3):772-780.
[8]Dastous J B.Nonlinear finite-element analysis of stranded conductors with variable bending stiffness using the tangent stiffness method[J].IEEE Transactions on Power Delivery,2005,20(1):328-338.
[9]Kiureghian A D,Sackman J L,Hong K J.Interaction in interconnected electrical substation equipment subjected to earthquake ground motions[R].California,USA:Pacific Earthquake Engineering Research Center,1999.
[10]Kiureghian A D,Hong K J,Sackman J L.Further studies on seismic interaction in interacted electrical substation equipment[R].Berkeley,California:Pacific Earthquake Engineering Research Center,2000.
[11]Song J,Kiureghian A D,Sackman J L.Seismic interaction in electrical substation equipment connected by non-linear rigid bus conductors[J].Earthquake Engineering and Structural Dynamics,2007,36(2):167-190.
[12]Kiureghian A D,Sackman J L,Hong K J.Seismic interaction in linearly connected electrical substation equipment[J].Earthquake Engineering and Structural Dynamics,2001,30(3):327-347.
[13]Filiatrault A,Kremmidas S.Seismic interaction of interconnected electrical substation equipment[J].Journal of Structural Engineering,2000,126(10):1140-1149.
[14]Stearns C,Filiatrault A.Electrical substation equipment interaction:experimental rigid conductor studies[R].California,USA:Pacific Earthquake Engineering Research Center,2003.
[15]Filiatrault A,Stearns C.Electrical substation equipment interaction:experimental flexible conductor studies[R].California,USA:Pacific Earthquake Engineering Research Center,2002.
[16]Bhuyan G S,Zhai E,Ghalibafian H,et al.Seismic behavior of flexible conductors connecting substation equipment,part I:static and dynamic properties of individual components[J].IEEE Transactions on Power Delivery,2004,19(4):1673-1677.
[17]Ghalibafian H,Bhuyan G S,Ventura C,et al.Seismic behavior of flexible conductors connecting substation equipment,part II:shake table test[J].IEEE Transactions on Power Delivery,2004,19(4):1680-1687.
[18]Institute of Electrical and Electronics Engineers.IEEE 693—2005 Recommended practice for seismic design of substations[S].New York:IEEE,2005.
[19]Institute of Electrical and Electronics Engineers.IEEE 1527—2006 Recommended practice for the design of flexible buswork located in seismically active areas[S].New York:IEEE,2006.
[20]Takhirov S M,Fenves G L,Fujisaki E,et.al.Ground motions for earthquake simulator qualification of electrical substation equipment[R].California,USA:Pacific Earthquake Engineering Research Center,2005.
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