摘要
近几年覆冰危害已经严重影响了我国电力系统的安全稳定运行,按照传统设计标准建设的部分线路无法承受日益恶化的气候变化。为了准确定位重覆冰条件下输电线路塔线系统的结构薄弱点,给在线监测装置提供精确位置参数,本文利用有限元分析软件ANSYS,考虑杆塔和导、地线之间的力学耦合作用,针对具体线路覆冰微气候区,建立整体耐张段线路模型,从系统的角度分析在各种风速、覆冰条件下的力学特性,找出塔线系统中结构薄弱杆塔。然后利用一塔两线模型进行精细分析,再次对结构薄弱处进行准确定位,并与耐张段所获结论进行验证对比,最终结合两种模型的优势提出获取耐张段杆塔薄弱位置较为简单的方法。
Icing disaster is one of the important factors against the safety and stability of China＇s power system in recent years, and some transmission lines designed according to traditional standard unable to withstand the worsening climate change. For positioning the weak points of the transmission line under heavy icing accurately and providing accurate positional parameters to online monitoring devices, a whole tension segment line model is established for specific line icing micro-climate zones by using finite element analysis software ANSYS, considering the mechanical coupling between the tower, grounding wire and conductor. To analyze the mechanical properties under various wind speed, icing conditions from the perspective of the system, to identify structural weaknesses tower in the tower-line system. Fine analysis is carried out by using the single tower-double lines model, accurate positioning the structural weak point again, and verify comparison are carried out with the conclusions obtained from the strain segment, Eventually the relatively simple methods for obtaining the weak point of tension segment tower by combining the advantages of both models is proposed.
出处
《电瓷避雷器》
CAS
北大核心
2016年第2期1-5,11,共6页
Insulators and Surge Arresters
基金
国家重点基础研究发展计划项目(973计划)(编号:2011CB209404)
