Meteorological conditions of ice accretion based on real-time observation of high voltage transmission line  

作　　者：Yue Zhou ShengJie Niu JingJing Lü LiJuan Zhao 

机构地区：[1]Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Sch Atmospher Phys, Nanjing 210044, Jiangsu, Peoples R China

出　　处：《Chinese Science Bulletin》2012年第7期812-818,共7页

基　　金：supported by the National Key Technology R&D Program (2008BAC48B01);the National Natural Science Foundation of China (40775012);the Jiangsu Province Qinglan Project for Cloud Fog Precipitation and Aerosol Research Group;the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：Meteorological conditions during ice accretion on the 500 kV high voltage transmission lines and test cables are presented, together with a calculation of liquid water content (LWC). The data include meteorological observations and real-time ice accretion on the transmission lines of the central China power grid, from 2008 to 2009 in Hubei Province. Also included are observations of ice thickness, microphysics of fog droplets, and other relevant data from a nearby automated weather station at Enshi radar station, from January to March 2009. Results show that temperature at Zhangen tower #307 was correlated with the temperature at Enshi radar station. The temperature on the surface of the high voltage transmission line was 2-4°C higher than ambient air temperature, although the temperatures were positively correlated. Ice formation temperature was about -2°C and ice shedding temperature was about -2 to -1°C on the high voltage transmission line, both of which were lower than the temperature threshold values on the test cable. Ice thickness was significantly affected by temperature variation when the ice was thin. The calculated LWC was correlated with observed LWC, although the calculated value was greater.Meteorological conditions during ice accretion on the 500 kV high voltage transmission lines and test cables are presented, to- gether with a calculation of liquid water content （LWC）. The data include meteorological observations and real-time ice accretion on the transmission lines of the central China power grid, from 2008 to 2009 in Hubei Province. Also included are observations of ice thickness, microphysics of fog droplets, and other relevant data from a nearby automated weather station at Enshi radar station, from January to March 2009. Results show that temperature at Zhangen tower #307 was correlated with the temperature at Enshi radar station. The temperature on the surface of the high voltage transmission line was 2-4~C higher than ambient air temperature, although the temperatures were positively correlated. Ice formation temperature was about -2~C and ice shedding temperature was about -2 to -I^C on the high voltage transmission line, both of which were lower than the temperature threshold values on the test cable. Ice thickness was significantly affected by temperature variation when the ice was thin. The calculated LWC was correlated with observed LWC, although the calculated value was greater.

关 键 词：高压输电线路 气象条件 实时观察 积冰 表面温度 气象观测 低定量涂布纸 海冰厚度 

分 类 号：P426.63[天文地球—大气科学及气象学] TM726.1[电气工程—电力系统及自动化]