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 t...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.展开更多
The development of wind energy is indispensable in the pursuit of global carbon neutrality.This article's analysis of observational data across China reveals the annual average wind speed declined at a rate of−0.1...The development of wind energy is indispensable in the pursuit of global carbon neutrality.This article's analysis of observational data across China reveals the annual average wind speed declined at a rate of−0.167 m·s^(-1)decade^(-1)between 1981 and 2014.This rate is 33 times faster than projections from the Coupled Model Intercomparison Project(CMIP)of the World Climate Research Programme.We propose a novel wind power scale estimation method based on annual average wind speed,suitable for assessing climate change impacts.Considering China's planned wind power generation in 2030,climate change may increase the required wind installed capacity by over 25%under the observed trend scenario.In contrast,historical average and CMIP scenarios could substantially overestimate wind potential while underestimating the necessary future wind power development scale.Climate change poses potential adverse impacts on China's carbon peak goals,necessitating targeted measures to mitigate these effects.展开更多
基金supported by the National Key R&D Program of China grant number 2018YFC0809400the science and technol-ogy foundation of State Grid Corporation of China grant number5200-202016243A-0-0-00the Innovation Fund of China Electric Power Research Institute grant number NY83-19-002。
文摘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.
基金Joint Research Fund in Smart Grid,Grant/Award Number:U1966601State Grid Co.,Ltd.Science and Technology Project,Grant/Award Number:4000‐202155465A‐0‐0‐00。
文摘The development of wind energy is indispensable in the pursuit of global carbon neutrality.This article's analysis of observational data across China reveals the annual average wind speed declined at a rate of−0.167 m·s^(-1)decade^(-1)between 1981 and 2014.This rate is 33 times faster than projections from the Coupled Model Intercomparison Project(CMIP)of the World Climate Research Programme.We propose a novel wind power scale estimation method based on annual average wind speed,suitable for assessing climate change impacts.Considering China's planned wind power generation in 2030,climate change may increase the required wind installed capacity by over 25%under the observed trend scenario.In contrast,historical average and CMIP scenarios could substantially overestimate wind potential while underestimating the necessary future wind power development scale.Climate change poses potential adverse impacts on China's carbon peak goals,necessitating targeted measures to mitigate these effects.
