特高压干式平波电抗器的抗震性能试验研究
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摘要
特高压直流输变电线路的电抗器在尺度和静动力特性与中高压输变电线路电抗器有很大的不同,其抗震性能对于保证电网安全至关重要。针对特高压输变电线路的电抗器抗震性能进行了振动台动力模型试验研究,根据弹性力-重力相似律推导出各物理量之间的相似关系和相似比尺设计了试验模型。通过不同的地震激励研究了电抗器的动力特性测试及其抗震能力,得到了电抗器关键部位在地震作用下的加速度、位移和应变反应及抗震薄弱部位。试验结果表明:加速度响应在各层均有不同程度的放大,支柱绝缘子的根部和顶部是电抗器的抗震薄弱部位。竖向地震动对电抗器的动位移、加速度影响很小,对动应变影响很大,因此在电抗器抗震设计中需要考虑竖向地震的影响。
Aseismic problem of the ultra-high voltage(UHV) DC transmission projects is one of the most serious problems for the transmission system.A great difference lies in the dimension,static and dynamic characteristics between UHV reactor and middle high voltage one,so the aseismic performance is most important to the safety of electric network.In order to study the seismic behavior of UHV reactor,a shake table test on a big scale model was carried out.According to similarity relationship between physical parameters deduced by elasticity-gravity similarity law,an experimental model of UHV reactor was designed.After comparing the seismic behavior of UHV reactor under different earthquake excitations,the dynamic responses of system,such as accelerations,displacements and strains at key positions,and vulnerable parts were acquired.Results show that the acceleration responses at different layers are enlarged in some extent.The bottom and top of post insulator are the seismic vulnerable parts of the equipment due to its complex stress state.Vertical seismic excitations have less influence on the acceleration and displacement responses,but great influence on the dynamic strains.So vertical earthquake should be considered in the seismic design of UHV reactor.
Aseismic problem of the ultra-high voltage(UHV) DC transmission projects is one of the most serious problems for the transmission system.A great difference lies in the dimension,static and dynamic characteristics between UHV reactor and middle high voltage one,so the aseismic performance is most important to the safety of electric network.In order to study the seismic behavior of UHV reactor,a shake table test on a big scale model was carried out.According to similarity relationship between physical parameters deduced by elasticity-gravity similarity law,an experimental model of UHV reactor was designed.After comparing the seismic behavior of UHV reactor under different earthquake excitations,the dynamic responses of system,such as accelerations,displacements and strains at key positions,and vulnerable parts were acquired.Results show that the acceleration responses at different layers are enlarged in some extent.The bottom and top of post insulator are the seismic vulnerable parts of the equipment due to its complex stress state.Vertical seismic excitations have less influence on the acceleration and displacement responses,but great influence on the dynamic strains.So vertical earthquake should be considered in the seismic design of UHV reactor.
引文
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[2]杨亚弟,李桂荣.电气设施抗震研究概述[J].世界地震工程,1996,(2):20—22.Yang Yadi,Li Guirong.An introduction to aseismicresearch on electric equipments[J].World Informa-tion on Earthquake Engineering,1996,(2):20—22.
[3]李子国,景丽英.S7-200/10变型变压器抗震分析[J].地震工程与工程振动,1997,17(4):100—106.Li Ziguo,Jing Liying.Seismic response analysis forS7-200/10power transformer structure[J].Earth-quake Engineering and Engineering Vibration,1997,17(4):100—106.
[4]罗孟杰,丁旭.三相叠装式空心电抗器模型动态试验分析[J].沈阳工业大学学报,1998,20(1):7—10.Luo Mengjie,Ding Xu.Analysis of the laminate hol-low reactor modal testing[J].Journal of ShenyangPolytechnic University,1998,20(1):7—10.
[5]曹枚根,周福霖,谭平,等.大型电力变压器及套管振动台抗震试验研究[J].振动与冲击,2011,30(11):122—129.Cao Meigen,Zhou Fulin,Tan Ping,et al.Shaking ta-ble test on seismic performance of large power trans-former with bushings[J].Journal of Vibration andShock,2011,30(11):122—129.
[6]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.
[7]谢强,王亚非.软母线连接电气设备地震模拟振动台试验研究[J].中国电机工程学报,2011,31(4):112—118.Xie Qiang,Wang Yafei.Shake-table test on earth-quake simulation of substation equipment interconnec-ted by flexible bus[J].Proceedings of the CSEE,2011,31(4):112—118.
[8]谢强,王健生,杨雯,等.220kV断路器抗震性能地震模拟振动台试验[J].电力建设,2011,32(10):10—14.Xie Qiang,Wang Jiansheng,Yang Wen,et al.Shaketable test on seismic performance of 220kV circuitbreaker[J].Proceedings of the CSEE,2011,32(10):10—14.
[9]胡晓,邢国良,王建惠.(BKK20000/66)干式空心并联电抗器现场原型动力试验研究[J].工程抗震,2004,(4):35—37.Hu Xiao,Xing Guoliang,Wang Jianhui.Prototypedynamic test of dry parallel reactor[J].EarthquakeResistant Engineering,2004,(4):35—37.
[10]王清璞,李文平,王冰.±800kV的压直流输电用干式平波电抗器久研发[J].电力设备,2006,7(12):11—14.Wang Qingpu,Li Wenping,Wang Bing.R&D ofdry type smoothing reactor for±800kV HVDC pow-er transmission[J].Electrical Equipment,2006,7(12):11—14.
[11]林皋,朱彤,林蓓.结构动力模型试验的相似技巧[J].大连理工大学学报,2000,40(1):1—8.Lin Gao,Zhu Tong,Lin Pei.Similarity technique fordynamic structural model test[J].Journal of DalianUniversity of Technology,2000,40(1):1—8.
[12]GB50260-96.电力设施抗震设计规范[S].北京:中国计划出版社,1996.GB 50260-96.Code for design of seismic of electricalinstallations[S].Beijing:China Plan Publishing Com-pany,1996.
[13]GB/T13540-92.高压开关设备抗地震性能试验[S].北京:中国标准出版社,1992.CB/T 13540-92.Anti-seismic characteristic test forhigh-voltage switchgear[S].Beijing:China StandardsPress,1992.
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