500kV紧凑型线路覆冰舞动及非同期摇摆的防治措施

架空输电线路覆冰会引起导线舞动、杆塔倒塌、导线断线和绝缘子闪络等事故,500kV紧凑型线路三相导线成等边倒三角排列,相间距离较常规线路大为减小,如果在覆冰情况下舞动及大风扰动下相间发生非同期摇摆,更容易造成相间距离不足,引起跳闸事故。因此,要减轻覆冰舞动及非同期摇摆的灾害,除在线路设计阶段应尽量避开易覆冰舞动、易风偏区域外,还应配置全面的防治覆冰舞动及非同期摇摆的措施。

Prevention Measures on Compact 500kV Ice Coating Line Galloping and Asynchronous Swaying

Overhead transmission line galloping causes tower collapse, broken wires and insulator flashover and other incidents, 500kV compact line with three-phase conductors arranged in an equilateral triangle down rather than the position of conventional transmission line makes the interphase distance greatly reduced, if the ice coating line galloping and at the same time asynchronous swing of phase lines from heavy wind disturbance appears, it is to cause less interphase distance even worse, causing tripping accidents. Therefore, to reduce the ice coating line galloping and asynchronous swaying damage on the transmission line, the transmission line should be designed to evading posing on vulnerable area, and a comprehensive prevention and treatment should be configured to prevent the damage.