大气和海洋科学快报（英文版）2021，Vol.14Issue(2)：28-34,7.
导致甘肃输电线路舞动的蒙古气旋的形成及增风机理研究
On the formation and wind enhancement mechanisms of a Mongolian cyclone that caused a transmission line galloping trip in Gansu province
摘要
Abstract
Influenced by strong winds associated with a southeastward-moving Mongolian cyclone,a severe transmission line galloping occurred in Baiyin City,Gansu Province,on 14 April 2020.This caused a tripping incident of the transmission line in this region.Based on the hourly,0.5°×0.5°,ECMWF ERA5 reanalysis data,this study investigated the formation mechanisms of the Mongolian cyclone and its associated strong winds.Results from the vorticity budget indicate that the convergence-related vertical stretching and the upward transport of cyclonic vorticity governed formation of the Mongolian cyclone in this event;whereas,tilting and export of cyclonic vorticity from the central region of the cyclone mainly decelerated the cyclone's formation.The kinetic energy(KE)budget shows that the wind associated with the Mongolian cyclone was mainly enhanced by the positive work of the pressure gradient force.Unlike some typical strong wind events in Northwest China,during this event,no significant downward momentum transportation from the upper troposphere was found.The vertical transport of KE exerted a slightly favorable effect on the KE increase around the location where the transmission line galloping trip appeared.In contrast,the horizontal transport mainly caused an export of KE from this region,which applied an overall negative effect on the wind enhancement associated with the Mongolian cyclone.关键词
蒙古气旋/动能/电网/线路舞动Key words
Mongolian cyclone/Kinetic energy/State grid/Transmission line galloping trip引用本文复制引用
Shuanglong Jin,Shuanglei Feng,Xiaolin Liu,Bo Wang,Zongpeng Song,Wei Cui,Cong Wang..导致甘肃输电线路舞动的蒙古气旋的形成及增风机理研究[J].大气和海洋科学快报（英文版）,2021,14(2):28-34,7.基金项目
This research was supported by the National Key R&D Program of China[grant number 2018YFC0809400],the science and technol-ogy foundation of State Grid Corporation of China[grant number 5200-202016243A-0-0-00],and the Innovation Fund of China Electric Power Research Institute[grant number NY83-19-002]. （）
