The Meteorological Conditions and Micro-physical Mechanism of Wire Icing
Glaze,rime condensed on the wireo r wet snow frozen on the wireis known as the wire icing.Sometimes this event would cause damage to local transmission line and cause enormous losses to national economy.Concentrating on the study of the meteorological conditions and micro-physical mechanism,we have obtained series of plausible results from the wire icing observations in Enshi(Hubei province)and Mount Lu(Jiangxi province).Regarding the meteorological conditions of wire icing,Niu et al.(2012)indicated that icing on power line always began to accrete in the evening,and fell off at midday with the temperature near 0℃(-1~0℃).Comparing the difference between 500kV high-voltage transmission line and test cable under the icing meteorological conditions,Zhou et al.(2012)pointed out that the surface temperature of high-voltage transmission(-2℃)was lower than that of test cable(-2℃-1℃)with ice accretion and shedding simultaneously.In addition,the meteorological conditions of wire icing were illustrated at Liu and Niu(2015),Hu et al.(2017)as well.Concerning the micro-physical mechanism of wire icing,Niu et al.(2012)indicated that the average liquid water content of fog droplets in the stage of ice growth was more than other ones,likewise the related coefficient between liquid water content and ice thickness growth rate was 0.62.Jia et al.(2010)summarized the characteristic of fog and rain droplet spectrum under three types of weather conditions.Niu et al.(2010)compared the characteristic of rain droplet spectrum in convection cloud and stratiform cloud.Zhou et al.(2013)analyzed how the contribution of freezing drizzle to ice growth,and pointed out that freezing drizzle had a vital catalytic role in ice growth.Concerning study relating to the simulation of wire icing,Niu et al.(2012)simulated the icing diameter in four icing processes.Zhou et al.(2014)simulated the temperature stratification and micro-physical characteristic of fog and cloud in three kinds of ice processes at Enshi radar station preferably by Thompson parameterization coupling scheme in WRF.
wire icing meteorological condition micro-physical
NIU Shengjie WANG Tianshu Lü Jingjing ZHOU Yue
School of Atmospheric Physics,Nanjing University of Information Science & Technology,Nanjing,210044; School of Atmospheric Physics,Nanjing University of Information Science & Technology,Nanjing,210044 Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing,210044 Wuhan Regional Climate Center,Wuhan,430074
国际会议
重庆
英文
1-6
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）