架空输电线舞动的计算机仿真

为建立导线舞动的计算机仿真模型,研究导线舞动以及制定防舞措施,利用目前比较全面反映导线舞动特性的三自由度(3DOF)线路舞动模型,同时通过计算流体力学研究了典型覆冰导线的空气动力特性并得出其空气动力特性典线。基于上述导线动力模型和空气动力典线,设计了导线舞动的仿真计算程序。利用该程序对4分裂导线(包括子导线间隔棒)建立模型并进行舞动的动态仿真,同时输出导线舞动仿真的三维图像,从中可以形象直观地看到舞动的发展过程,为舞动特性研究以及防舞装置、防舞措施的研究提供了一个有力工具。通过该程序的扩展模块还可对各种防舞装置的防舞效果进行动态仿真。

Computer Simulation of Overhead Transmission Line Galloping

The galloping of iced conductors is a critical threat to the safe and stable work of the electric power system.Because of the complexity of conductor galloping mechanism,it is very important to build a computer simulation model of conductor galloping to help study work on galloping mechanism and galloping protection devices.In the paper,3-DOF conductor galloping model is used,which reflects comprehensively the galloping mechanism and calculates the iced conductor aerodynamic force coefficient by fluid dynamic,to get the aerodynamic force coefficient curve.Based on the conductor galloping modeling and the aerodynamic coefficient curve,a computer simulation program of power line galloping is presented.The modeling and dynamic simulation of the galloping formation of the 4-bundle conductor(with space bars installed between sub-conductors) are presented by this program,and the galloping formation can be observed directly and visibly through the three-dimensional image presented by the program.It is an effective tool to help the research on the galloping mechanism and galloping protection devices.In addition,the program with expanding module can also be used in the dynamic simulation to analyze the anti-galloping effects of all kinds of galloping protection devices.