不同建筑物对雷云电过程的影响分析

发布时间：2018-04-01 18:05

本文选题：二维随机模型　切入点：闪击距离　出处：《电瓷避雷器》2017年05期

【摘要】：改变建筑物高度、宽度,利用时域有限差分法建立了闪电先导二维随机模型,模拟了雷云电过程,分析了不同建筑物状态下雷云放电过程中产生的上/下行先导长度、连接点位置和闪击距长度等参数。仿真结果表明:宽度不变,当建筑物高度从200 m增加到300 m时,下行先导的长度变短,同时下/上行导连接点的空间位置随之抬高,上行先导的长度基本不变;改变建筑物高度从200 m减小到100 m,下行先导长度增加并且连接点位置降低,上行先导长度基本保持不变;保持建筑物高度一样,改变建筑物宽度不影响上/下行先导的长度以及连接点的空间位置;改变建筑物高度、宽度,闪击距离长度保持在一定范围内不发生明显变化。
[Abstract]:By changing the height and width of the building, a two-dimensional stochastic model of lightning forerunner is established by using the finite-difference time-domain method. The lightning electric process is simulated, and the up-and-down lead lengths generated during the discharge process of the lightning cloud under different building conditions are analyzed.Connection point position and flicker distance length and other parameters.The simulation results show that when the height of the building is increased from 200m to 300m, the length of the downlink becomes shorter, and the space position of the lower / uplink joint point is raised, and the length of the uplink pilot is basically unchanged.Change the height of the building from 200 m to 100 m, increase the downlink lead length and decrease the connecting point position, and keep the upstream pilot length basically unchanged; keep the building height the same.Changing the width of the building does not affect the length of the up-and-down pilot and the space position of the connecting point, while changing the height and width of the building and keeping the length of the flicker distance within a certain range does not change obviously.
【作者单位】：气象灾害预报预警与评估协同创新中心南京信息工程大学;中国气象局气溶胶与云降水重点开放实验室南京信息工程大学;江苏省气象探测与信息处理重点实验室南京信息工程大学;
【基金】：国家自然科学基金(编号:61072133) 江苏省产学研联合创新资金计划(编号:BY2013007-02) 江苏省高校自然科学研究重大项目计划(编号:15KJA460008) 江苏省“信息与通信工程”优势学科平台江苏省“六大人才高峰”计划资助的课题
【分类号】：TU201;TU895

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