Characteristic Analysis of Lightning Activities along Fujian Expressway
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Abstract:
In order to reveal the characteristics of lightning activities along the Fujian expressway and to make a proper lightning protection of expressway, this paper uses the lightning monitoring data of 2015 to 2018 from the expressway network of Fujian to make statistical analysis. An analysis is made of the monthly and daily changing characteristics of ground lightning, and results show that ground lightning occurs more frequently from May to September, from 14:00 to 18:00. The lightning activity distribution diagram is drawn along the Fujian expressway based on the ground lightning density, and it is concluded that the proportion of less thunder area, middle thunder area, more thunder and strong thunder area are 519%, 12.65%, 63.03% and 19.13%, respectively. The lightning intensity level distribution diagram is drawn based on the lightning current magnitude and lightning steepness, and it is concluded that 89.87% of the expressway are classified as Grade 3. Finally this paper makes statistics of cumulative probability distribution of lightning current magnitude and calculates its fitting function, and the results show that the cumulative probability distribution of lightning current magnitude along the Fujian expressway accords with that recommended by IEEE, and the fitting function is 〖WTBX〗P〖WTBZ〗=1/［1+(〖WTBX〗I〖WTBZ〗/20.05)2.642］.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.