干旱气象 ›› 2021, Vol. 39 ›› Issue (06): 1025-1030.DOI: 10.11755/j.issn.1006-7639(2021)-06-1025

• 业务技术应用 • 上一篇    下一篇

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1(), 张文煜2   

  1. 1.河北省石家庄市气象局,河北 石家庄 050081
    2.郑州大学地球科学与技术学院,河南 郑州 450001
  • 收稿日期:2020-10-23 修回日期:2021-02-04 出版日期:2021-12-30 发布日期:2021-12-31
  • 作者简介:张翠华(1976— ),女,河北藁城人,硕士,高级工程师,主要从事应用气象服务工作. E-mail: zch7695@sina.com
  • 基金资助:
    国家自然科学基金(41875085);中国沙漠气象科学研究基金(Sqj2018008);河北省科研开发项目共同资助(20ky15)

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

ZHANG Cuihua1(), ZHANG Wenyu2   

  1. 1. Shijiazhuang Meteorological Bureau of Hebei Province, Shijiazhuang 050081, China
    2. School of Geoscience and Technology, Zhengzhou University, Zhengzhou 450001, China
  • Received:2020-10-23 Revised:2021-02-04 Online:2021-12-30 Published:2021-12-31

摘要:

基于1990—2017年河北石家庄输电线路雷击事故资料,结合输电线路雷击发生前6 h的气象要素数据,利用发生概率、发生频率、线性趋势和波动幅度等统计方法,分析该地区输电线路雷击发生规律以及输电线路雷击发生前6 h内的定时风向、气压、相对湿度、气温和地温变化;通过界定输电线路雷击累计发生频率确定其气象指标,并利用EC数值预报和自动站实况对比,检验2018年8月9日石家庄井陉县输电线路雷击事故等级预报的准确性。结果表明:近来年石家庄输电线路雷击事件呈逐年明显增加趋势,呈现出3个高峰期,主要发生在夏季的午后至次日清晨,其中8月03:00—04:00输电线路雷击事故发生概率最大;当出现偏东风,气压和相对湿度上升,或气温和地表温度下降时,输电线路雷击事故发生次数较多;在6 h内当气压上升0.0~2.0 hPa,空气湿度上升0~14%,气温下降0.0~3.0 ℃,地表温度下降0.0~6.5 ℃,定时风向在以东风为中心风向的90°范围内时极易发生输电线路雷击事故;输电线路雷击的发生规律和气象指标在2018年8月9日得到较好的预测检验,对防范雷击事故有一定指导意义。

关键词: 输电线路, 雷击, 气象指标, 预测检验

Abstract:

Based on the detailed information on transmission line lightning strike and meteorological elements data in 6 hours before transmission line lightning strikes from 1990 to 2017 in Shijiazhuang of Hebei Province, the statistical methods such as occurrence probability, occurrence frequency, linear trend and fluctuation amplitude were used to analyze occurrence regularity of transmission line lightning strikes, variation of timing wind, pressure, relative humidity, air temperature and ground temperature in 6 hours before transmission line lightning strikes. By defining the cumulative occurrence frequency of transmission line lightning strikes, the meteorological element indicators of occurrence of transmission line lightning strikes were determined, and the accuracy of level prediction of transmission line lightning strike accidents in Jingxing county of Shijiazhuang on 9 August 2018 was tested by comparing the EC numerical prediction with the automatic station data. The results show that the transmission line lightning strike accidents increased significantly and there were three peaks in Shijiazhuang in recent years, occurring mainly from afternoon to morning in summer, in August there was the highest probability, and in a day it was highest from 03:00 BST to 04:00 BST. In addition, when there was easterly wind, air pressure and relative humidity were rising, or when air temperature and land surface temperature were dropping, transmission line lightning strike accidents occurred frequently. Within 6 hours, when air pressure rose by 0.0-2.0 hPa, air humidity increased by 0-14%, air temperature dropped by 0-3.0 ℃, land surface temperature dropped by 0-6.5 ℃, and with the east wind as the central wind direction, the timing wind direction was within the range of 90°, the occurrence regularity and meteorological indicators of lightning strikes on transmission lines were well predicted and tested on 9 August 2018, which had certain guiding significance for preventing lightning strike accidents.

Key words: transmission line, lightning strikes, meteorological index, prediction test

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