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.
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
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
high voltage transmission line, ice accretion on wire, surface temperature on power line, meteorological conditions, liquidwater content
