±800 kV滇西北特高压直流工程穿墙套管抗震性能研究  

Seismic Performance Study on DC Wall Bushing of ±800 kV Dianxibei UHVDC Transmission Project

作　　者：罗兵 饶宏 卓然 胡蓉[2] 孙帮新[2] 谢强[3] 王晓游 

机构地区：[1]直流输电技术国家重点实验室(南方电网科学研究院),广州510663 [2]中国南方电网超高压输电公司,广州510620 [3]同济大学建筑工程系,上海200092

出　　处：《南方电网技术》2017年第12期1-8,共8页Southern Power System Technology

摘　　要：在高海拔、高地震烈度地区,良好的抗震性能是特高压直流穿墙管研制和运行的关键。针对滇西北特高压直流工程送端新松换流站9度地震烈度设防要求,为解决穿墙套管的抗震性能难题,评估穿墙套管的抗震性能,建立了新松站±800 kV穿墙套管及阀厅的有限元模型并进行地震响应分析。仿真结果发现设备应力响应较大,为增加应力安全裕度,提高设备抗震可靠性,提出了在穿墙套管根部布置金属摩擦阻尼器的减震方案,以提高套管整体抗震性能。同时根据仿真计算结果设计和研制了开展振动台试验所用的套管支架,对工程供货直流穿墙套管真型设备开展振动台试验研究,对比安装阻尼装置前后的直流穿墙套管地震响应发现:该方案可有效降低穿墙套管的地震响应,其最大应力和最大相对位移分别下降39.2%和71.3%,应力安全系数由1.53提高至2.52,显著提升了直流穿墙套管的抗震性能,满足滇西北工程抗震技术要求。In high altitude and high earthquake intensity areas, excellent seismic performance should be the key point for UHVDC （ ul- tra-high voltage direct current） wall bushing design, manufacture and operation. In order to solve seismic performance problems of wall bushing, according to the 9 degree intensity anti-seismic requirement of the Xinsong sending converter station of Dianxibei UH- VDC transmission project, in order to evaluate wall bushing seismic performance, the finite element models combined with the wall bushing and valve hall of ±800 kV Dianxibei UHVDC transmission project have been established to get the seismic responses. As the analysis results show that the seismic responses are large, the anti-seismic design of the metal friction type dampers has been carried out to increase the safety and anti-seismic reliability of the wall bushing. Then the bushing support used in the shaking table test has been designed and manufactured based on the numerical simulation. The shaking table test on the DC wall bushing of project supply equip- ment has been made to compare the seismic response before and after the dampers installed on DC wall bushing. The results show that the existence of metal friction dampers could decrease the seismic response obviously. The maximum stress response decreases 39. 2% while the maximum relative displacement decreases 71.3%, and the stress safety factor could increase to 2. 52 from 1.53. The anti- seismic performance of DC wall bushing has been substantially increased to fulfill the project seismic requirement.

关 键 词：特高压直流穿墙套管 有限元分析 振动台试验 金属摩擦阻尼器 地震响应 

分 类 号：TN711[电子电信—电路与系统]