摘要
导线舞动是威胁架空输电线路安全稳定运行的重要因素,我国是舞动灾害最为严重的国家之一,舞动会对输电线路造成巨大的破坏,破坏主要表现为闪络、跳闸,电弧烧伤,金具、绝缘子损坏,导线断股、断线,倒塔等。机械损坏主要是由舞动产生的导线张力的巨大变化引起的。通过对线路舞动时导线动态张力变化的理论及试验分析,得出了张力变化的规律,即线路舞动时导线动态张力(可能达到的)最大值约为导线静态张力的2倍,同时给出了导线张力变化的估算方法。结合舞动产生的导线张力变化对导线、金具、绝缘子等受力构件的影响的分析,提出了架空输电线路从提高机械强度的角度进行防舞设计的方法,为架空输电线路的防舞设计提供了依据。
Conductor galloping threatens the safety and stable run of electric transmission lines, and China is one of the countries that suffer loss most severely from galloping. The loss is shown as： flashover or trip, arc burn, fitting and insulator damage, cable lay or strand break, tower collapse, etc. The mechanical damage is caused mainly by huge conductor tension variety arising from galloping. Through theoretical and testing analysis of conductor dynamic tension under galloping, the varying rules of conductor tension were obtained that the maximum dynamic tension approximately doubles the static tension, and also the estimating method of tension varying was acquired. Based on these results, as well as the effects of the dynamic tension on conductors, fittings and insulators, the anti-galloping design methods, from the point of view to enhance the mechanical strength, are put forward, which offers the foundation of anti-galloping design on overhead power transmission lines.
出处
《中国电力》
CSCD
北大核心
2005年第10期40-44,共5页
Electric Power
关键词
舞动
动态张力
防舞设计
galloping
dynamic tension
anti-galloping design
