安装新型铅减震器的500kV氧化锌避雷器动力特性
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摘要
为研究新型铅金属减震器对高压电气设备动力特性的影响,对安装该减震器前后500kV氧化锌避雷器采用单输入单输出(SISO)方法进行了动力特性试验和有限元分析。试验结果表明:安装新型铅减震器前后500kV氧化锌避雷器的基频在1～10Hz之间且相差很小,振型基本一致;反映了设备整体刚度较小,新型铅金属减震器基本没有改变设备的频率和振型。安装新型铅金属减震器后500kV氧化锌避雷器的阻尼比比原来增大了近3倍,说明这种减震器是以提供设备附加阻尼的方式实现减震控制的。新型铅金属减震器可使避雷器支持瓷套根部应变减少46%以上且可以明显降低其顶部的加速度和位移。有限元分析结果表明:安装新型铅减震器前后500kV氧化锌避雷器的振型以水平振型为主,竖向振型和扭转振型不明显。
In order to find out dynamic behaviors of the 500 kV zinc oxide arresters with and without a new type of lead damper,the dynamic behavior experiment and finite element analysis are carried out by means of single point input and single point output(SISO)measurement.The results of dynamic behavior experiment show that the primary frequencies of these two structures are between 1 Hz and 10 Hz and the difference between these two primary frequencies is not obvious,indicating that the overall stiffness of the two structures is low.The frequency of these two structures has hardly changed by the lead dampers,but the damping ratio of the arresters with the dampers is increased nearly 3 times,thus the fashion of vibration-reduction control of the dampers is to provide additional damping to the equipments.Owning to increment of damping device with the new type of lead dampers,there is an above reduction of 46% in the maximum stress of bottom porcelain pipe and the new type lead dampers can also decrease the relative displacement at the top of bushing.The results of finite element analysis show that the level modes of the 500 kV zinc oxide arresters with and without the new type of lead dampers are main modes and the vertical modes and torsional modes are not obvious.
In order to find out dynamic behaviors of the 500 kV zinc oxide arresters with and without a new type of lead damper,the dynamic behavior experiment and finite element analysis are carried out by means of single point input and single point output(SISO)measurement.The results of dynamic behavior experiment show that the primary frequencies of these two structures are between 1 Hz and 10 Hz and the difference between these two primary frequencies is not obvious,indicating that the overall stiffness of the two structures is low.The frequency of these two structures has hardly changed by the lead dampers,but the damping ratio of the arresters with the dampers is increased nearly 3 times,thus the fashion of vibration-reduction control of the dampers is to provide additional damping to the equipments.Owning to increment of damping device with the new type of lead dampers,there is an above reduction of 46% in the maximum stress of bottom porcelain pipe and the new type lead dampers can also decrease the relative displacement at the top of bushing.The results of finite element analysis show that the level modes of the 500 kV zinc oxide arresters with and without the new type of lead dampers are main modes and the vertical modes and torsional modes are not obvious.
引文
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[18]韩军科,朱全军,杨风利,等.基底隔震技术在高压电气设备中的应用[J].电网技术,2007,31(Sup2):69-71.HAN Junke,ZHANG Chunlei,YANG Fengli,et al.Application of base isolation in high voltage electricalequipment[J].Power System Technology,2007,31(Sup2):69-71.
[19]张雪松,代泽兵,曹枚根,等.安装新型铅减震器的500kV氧化锌避雷器抗震[J].武汉大学学报,2011,44(1):107-110.ZHANG Xuesong,DAI Zebing,CAO Meigeng,et al.Seismic behavior of 500kV zinc oxide lighting arresterswith new typelead damper[J].Engineering Journal ofWuhan University,2011,44(1):107-110.
[2]Araneda J C,Runnick H,Mocarquer S,et al.Lessonsfrom the 2010 Chilean earthquake and its impact onelectricity supply[C]∥Proceedings of the 2010International Conference on Power System Technology,October 24-28,2010,Hangzhou,China.Piscataway:IEEE Press,2010:1-7.
[3]程永锋,朱全军,卢智成.变电站电力设施抗震措施研究现状与发展趋势[J].电网技术,2008,32(22):84-89.CHENG Yongfeng,ZHU Quanjun,LU Zhicheng.Progress and development trend on seismic measuresof electric power equipments in transformer substation[J].Power System Technology,2008,32(22):84-89.
[4]于永清,李光范,李鹏,等.四川电网汶川地震电力设施受灾情况调研分析[J].电网技术,2008,32(11):1-6.YU Yongqing,LI Guangfan,LI Peng,et al.Investigationand analysis of electric equipment damage in Sichuan powergrid caused by Wenchuan earthquake[J].Power SystemTechnology,2008,32(11):1-6.
[5]李冀龙,欧进萍.铅剪切阻尼器的阻尼力模型与设计[J].工程力学,2006,23(4):67-73.LI Jilong,OU Jinping.Damping force models anddesigns of lead shear dampers[J].EngineeringMechanics,2006,23(4):67-73.
[6]Whittaker A S,Bertero V V,Thompson C L,et al.Seismic testing of steel plate energy dissipation devices[J].Earthquake Spectra,1991,7(4):563-604.
[7]Kelly J M,Skinner R I,Heine A J.Mechanisms ofenergy absorption in special devices for use inearthquake resistant structures[J].Bulletin of the NewZealand National Society for Earthquake Engineering,1972,5(3):63-88.
[8]Nomura S,Kozu I,Amikawa T.Fundamental study ondamping capacity of lead bearing damper[J].Journal ofStructural and Construction Engineering,1999(526):153-160.
[9]Robinson W H,Monti M D.Seismic isolation and passivedamping-the new zealand experience on isolation[C/OL]∥Proceedings of the Energy Dissipation Post-SmirtConference on Isolation,Energy Dissipation and Control ofVibration of Structures,August 25-27,1997,Taormina,Sicily,Italy.[2011-11-03].http:∥d.g.wanfangdata.com.hk/ExternalResource-gckz201205013%5e1.aspx.
[10]李爱群.工程结构减震控制[M].北京:机械工业出版社,2007.
[11]Bakre S V,Jangid R S,Reddy G R.Optimum X-platedampers for seismic response control of piping systems[J].International Journal of Pressure Vessels and Piping,2006,83(9):672-685.
[12]IEEE Standards Association.693-2005IEEE recommendedpractice for seismic design of substations[S].Piscataway:IEEE Press,2005.
[13]电力工业部.GB50260-2013电力设施抗震设计规范[S].北京:中国计划出版社,2013.
[14]谢强,王亚非.软母线连接变电站电气设备的地震响应分析[J].中国电机工程学报,2010,30(34):86-92.XIE Qiang,WANG Yafei.Seismic response analysis ofsubstation equipment interconnected by flexible bus[J].Proceedings of the CSEE,2010,30(34):86-92.
[15]曹枚根,徐忠根,刘智勇,等.振动模态识别技术在输电塔线动力特性研究中的应用[J].电力建设,2006,27(11):22-25,28.CAO Meigen,XU Zhonggen,LIU Zhiyong,et al.Application of Vibration Modal Identification inDynamic Characteristics Research[J].Electric PowerConstruction,2006,27(11):22-25,28.
[16]Mottershead J E,Friswell M I.Model updating instructural dynamics:a survey[J].Journal of Sound andVibration,1993,167(2):347-375.
[17]Ye Z M,Feng D,Chen L L.Seismic response andreliability of high voltage breaker based on stochasticearthquake model[C]∥Proceedings of the 2010 Asia-Pacific Power and Energy Engineering Conference,March 28-31,2010,Chengdu,China.Piscataway:IEEE Press,2010:1-4.
[18]韩军科,朱全军,杨风利,等.基底隔震技术在高压电气设备中的应用[J].电网技术,2007,31(Sup2):69-71.HAN Junke,ZHANG Chunlei,YANG Fengli,et al.Application of base isolation in high voltage electricalequipment[J].Power System Technology,2007,31(Sup2):69-71.
[19]张雪松,代泽兵,曹枚根,等.安装新型铅减震器的500kV氧化锌避雷器抗震[J].武汉大学学报,2011,44(1):107-110.ZHANG Xuesong,DAI Zebing,CAO Meigeng,et al.Seismic behavior of 500kV zinc oxide lighting arresterswith new typelead damper[J].Engineering Journal ofWuhan University,2011,44(1):107-110.
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