超长间隔棒在治理输电线路舞动中的应用分析和计算

Analysis and Calculation of Extra-long Interphase Spacer For Anti-galloping

线路舞动,尤其是高等级电压线路舞动,一直是威胁电网安全的重要因素。2010年,衢州电力局率先采用了超长相间间隔棒对500 kV线路进行舞动防治工作,并取得了良好的成果。分析了衢州地区的线路舞动情况以及进行防舞工作的必要性,并简要地介绍了超长相间间隔棒的选取方式与安装方法。在已有的架空线路输电导线舞动仿真软件的基础上,对超长间隔棒的实际防舞效果进行了分析,定量分析了加装间隔棒后线路的舞动幅值抑制效果与力学负荷情况,为超长间隔棒的应用提供了理论依据。同时,编写了基于导线悬链线模型的含操作界面的超长相间间隔棒结构长度优化计算程序。该程序能够较为精确地计算500 kV与110 kV输电线路不同安装方式下各支相间间隔棒的结构长度,计算精度在±4%以内,有效满足了工程实际需求。

In 2010 January,an infrequent and widespread galloping accident occurred in Zhejiang province.Quzhou Grid takes the lead to use the extra-long interphase spacer on 500 kV lines for anti-galloping purpose and succeeds to some extent.The paper introduces the galloping in Quzhou lines and the necessity of anti-galloping action,as well as the selection and installation of the extra-long interphase spacer.Based on the existed simulation models,this paper calculates the mechanical load and the effect on galloping amplitude after extra-long interphase spacer is installed on the lines.In the mean time,the paper designs a program to precisely calculate the length of the extra-long interphase spacer with the help of this program,whose calculation deviation is within 4 percent,and the structure length of the interphase spacer used for both 500 kV and 110 kV is easy to get.