浙江电力2026，Vol.45Issue(4)：47-59,13.DOI:10.19585/j.zjdl.202604005
浙江雷电活动时空分布规律及灾害风险区域划分研究
Study on the spatiotemporal distribution of lightning activity and lightning hazard zoning in Zhejiang Province
摘要
Abstract
Influenced by the monsoon climate and complex terrain,Zhejiang Province experiences frequent light-ning activity with distinct spatiotemporal characteristics.To support the enhancement of lightning monitoring,early warning,and protection capabilities in Zhejiang,lightning detection data from 2010 to 2024 were selected for analy-sis.First,the annual and seasonal spatiotemporal distributions of mean ground flash density(GFD)were statisti-cally examined.The results show that over the past 15 years,lightning activity in Zhejiang increased from southwest to northeast,with pronounced seasonal variability.Lightning was most concentrated in summer,and the diurnal variation of average lightning density showed a single-peaked distribution,with peak lightning occurrence concen-trated between 15:00 and 17:00.Second,a polarity-based statistical analysis of lightning frequency and intensity revealed that negative flashes accounted for more than 57%of all events,and the monthly mean lightning peak cur-rent primarily ranged from 28.0 to 37.7 kA.Finally,lightning risk zoning was conducted based on regional lightning withstand levels.Except for coastal islands,most areas reached grade C1 or above.For lightning protection of trans-mission lines,shielding failure is the main concern for 500 kV lines,whereas both shielding failure and back-flashover must be considered for 220 kV lines.For 220 kV and above lines across Zhejiang,the risks of shielding failure and back-flashover are predominantly at grade III,with grade IV risk areas being relatively limited and mainly located in Wenzhou,Taizhou,Ningbo,and parts of Lishui.The results provide technical support for re-gional lightning hazard prevention in Zhejiang Province.关键词
雷电活动/时空分布/季节变化/灾害风险/区域划分Key words
lightning activity/spatiotemporal distribution/seasonal variation/lightning hazards/hazard zoning引用本文复制引用
姜凯华,李特,王振国,刘泽,康丽莉,叶昊亮,王博闻..浙江雷电活动时空分布规律及灾害风险区域划分研究[J].浙江电力,2026,45(4):47-59,13.基金项目
国网浙江省电力有限公司科技项目(B311DS24001A) （B311DS24001A）
