【摘要】 为了研究石家庄地区输电线路雷击事故发生的气象条件，利用该地区1990—2018年输电线路雷击事故发生的详细资料和地面、探空气象资料，分析了输电线路雷击事故的时空变化，确定了容易发生输电线路雷击事故的天气系统配置和探空物理量阈值；通过输电线路雷击事故发生的气象条件，检验了2019—2020年输电线路雷击事故预报的准确性。结果表明：石家庄输电线路雷击事故主要发生在夏季傍晚前到前半夜，夏季发生概率明显高于春、秋季；输电线路雷击事故发生日数自西向东逐渐减少，集中发生在西部山区的井陉，其次是市区，井陉发生概率远高于其他地区；对流天气影响系统主要为高空槽型和冷涡型，探空物理量同时满足首要条件和附加条件时，引发输电线路雷击事故概率较高；输电线路雷击事故发生的气象条件在2019—2020年得到较好的预测检验，对防范雷击事故有一定指导意义。更多还原

【Abstract】 In order to study the meteorological conditions for lightning strikes on power transmission lines in Shijiazhuang, based on the detailed information of such accidents and meteorological data of surface observation and radiosonde from 1990 to 2018 in the region, the spatial and temporal variations of lightning strikes on power transmission lines are analyzed, and the configurations of weather systems and the threshold values of radiosonde physical quantities are determined. The forecast accuracy of lightning strikes on power transmission lines from 2019 to 2020 is tested by analyzing the meteorological conditions for the accidents. The results show that the lightning strikes on power transmission lines in Shijiazhuang mainly occur from early evening to early midnight in summer, and the probability in summer is significantly higher than that in spring and autumn. The days of such accidents decrease from west to east, mostly in Jingxing, a mountainous area in the west, followed by downtown areas, and the maximum probability is observed in Jingxing. When the convective weather systems are upper trough type and cold vortex type, and the radiosonde physical quantities satisfy both the necessary and additional conditions, the probability of lightning strikes on power transmission lines is high. The meteorological conditions for lightning strikes on power transmission lines from 2019 to 2020 have been well tested, which are instructive for preventing lightning strikes.更多还原