石家庄地区输电线路雷击事故发生的气象指标研究

张翠华, 张文煜

Meteorological index of lightning strike accidents of transmission line in Shijiazhuang area

ZHANG Cuihua, ZHANG Wenyu

表1 1990—2017年河北石家庄输电线路雷击事故发生前6 h内定时风向的发生频率 单位:%

Tab.1 The frequency of timing wind direction in 6 hours before the transmission line lightning strike accidents in Shijiazhuang of Hebei Province during 1990-2017

定时风向 雷击事故 前6 h 雷击事故 前3 h 雷击事故 前1 h N 5.7 5.7 10.0 NNE 5.7 5.7 8.6 NE 15.7 8.6 14.3 ENE 7.2 11.4 12.8 E 8.6 11.4 12.8 ESE 14.3 11.4 10.0 SE 11.4 17.2 8.6 SSE 7.2 5.7 4.3 S 4.3 7.2 5.7 SSW 1.4 1.4 0.0 SW 5.7 1.4 0.0 WSW 1.4 0.0 1.4 W 1.4 4.3 2.9 WNW 1.4 0.0 0.0 NW 4.3 2.9 5.7 NNW 1.4 4.3 2.9 C 2.9 1.4 0.0