浙江省雷击跳闸数据与闪电定位数据统计分析

Characteristic Analysis of Lightning-Inducing Trip-Out Events Based on Cloud-to-Ground Lightning Data in Zhejiang Province

利用浙江省电力部门雷击跳闸数据、浙江省气象局闪电定位数据,统计分析了2007—2011年电力雷击跳闸事故与地闪数据之间的时空分布特点、雷击跳闸事故与地闪参数及距离之间的关系。结果表明:电力雷击跳闸事故与地闪数据的日分布和月分布均为单峰结构,相关系数分别为0.9905和0.9881;空间分布虽有一定对应,但并非显著相关;导致110kV、220kV及500kV输电线路雷击跳闸的地闪强度主要集中在90kA以下,并且500kV输电线路雷击跳闸对应的电流强度相对较小;地闪与雷击跳闸事故杆塔距离、地闪与雷击跳闸杆塔对应输电线路的距离均主要集中在2km以下。

By means of the lightning trip-out data from electricity department and the cloud-to-ground lightning data obtained by the lightning position network from the Zhejiang Meteorological Service,the spatial and temporal distributions of electric power trip-out events from 2007 to 2011in Zhejiang Province are analyzed.The distances between trip-out events and cloud-to-ground lightning and the relationship between the parameters of cloud-to-ground lightning data and the voltage classes of lightning-inducing tripout events are analyzed.The results show that diurnal and monthly variation of lightning trip-out events and cloud-to-ground lightning exhibit a single-peak structure,and the correlation coefficients are 0.9905 and 0.9881,respectively.However,their spatial distributions are not significantly correlated.The lightning current intensity inducing trip-out events of 110 kV,220kV,and 500 kV power lines is below 90 kA in most cases,and the current intensity inducing the trip-out of 500 kV line is relatively lower.The distances between cloud-to-ground lightning and trip-out tower are less than 2km,so are the nearest distances between cloud-to-ground lightning and transmission lines.