Analysis of a Galloping Accident of Iced Power Lines Induced by Disastrous Weather
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Abstract:
The weather process during the galloping accident of iced power lines occurring in Hubei Province on 10 and 11 February 2010 is analyzed using the Weather Research and Forecasting Model (WRF) and the Jones ice accretion model, and a preliminary study of the severe weather predictability is conducted. The results show that: the simulation of ice thickness based on observed precipitation is 13 to 54 mm with the Jones wire icing model, and consistent in order of magnitude with the observed. Because of the overestimated precipitation by the WRF model, the wire icing thickness is larger than observation. The results of the WRF model show good agreement with observation in wind speed at 10 m (the simulated is about 5 to 10 m〖DK〗·s-1 and the north wind is prevailing). The transmission lines in Hubei Province are mostly oriented in the eastwest direction, more prone to ice galloping accidents.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.