%0 Journal Article %A WU Huiqin %A ZHANG Jinman %A ZHAO Zengbao %T Spatial-temporal Distribution Characteristics of Meteorological Elements Causing Ice Disaster on Transmission Wires in Hebei Province %D 2017 %R 10.11755/j.issn.1006-7639(2017)-06-0991 %J Journal of Arid Meteorology %P 991-997 %V 35 %N 6 %X

Ice disaster is one of the main meteorological disasters to the power grids, and the wire icing is closely related to rime and glaze. Based on the rime and glaze days at 142 meteorological stations, the observations of wire icing, relative humidity, temperature, wind speed and altitude at 20 meteorological stations during 1980-2009, and the ice disaster data of transmission wires and temperature, relative humidity, wind speed of nearby regional stations in the same period in recent years in Hebei Province, the spatial and temporal distribution characteristics of rime, glaze and wire icing days were analyzed by using statistical analysis method. And then the regression model of wire icing days was established by using stepwise regression analysis method. Finally, the relationships between ice disaster and meteorological elements were analyzed. The results show that rime and wire icing days existed obvious changes with rising first and then falling in Hebei Province during 1980-2009, and they reached a peak from the late 1980’s to the middle 1990’s, while glaze days didn’t change obviously. In space, rime and glaze mainly occurred in the plain area of southeastern Hebei Province, and the center of glaze deviated eastward with respect to the central of rime. The wire icing days was significantly correlated with rime days, glaze days and station altitude, and correlation coefficients were 0.988 5, 0.760 6 and -0.601 8, respectively. However, rime days and station altitude were introduced to the regression model. The dancing of wire might appear when temperature was less than 3 ℃. The relative humidity was more than 60% and above when wire was dancing or ice flashing, and wind speed was greater than 5 m·s-1 in the former case. All of above provided some guidance to weather service of ice disaster on transmission wires.

%U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2017)-06-0991