杆塔侧针用于500kV输电线路防雷效用模拟研究

发布时间：2018-01-09 12:18

本文关键词：杆塔侧针用于500kV输电线路防雷效用模拟研究　出处：《高电压技术》2014年03期 　论文类型：期刊论文

【摘要】：为研究杆塔侧针对500 kV输电线路防雷效果的影响,首先通过3维电气几何模型的搭建,从理论上分析了侧向短针的工作机理以及影响因素。进而搭建实体模型用来实际模拟山区输电线路走廊,通过大量重复放电试验统计各工况下的试验绕击率。结果表明:加装侧针可以大幅度地降低雷电绕击率;侧针长度与安装角度对保护效果都会造成影响,即随着侧针长度的增加或安装角度的减小,绕击率呈下降趋势。试验较好地印证了理论分析结果,为塔头侧针在输电线路防雷改造中的应用与评估提供了参考依据和理论支持。
[Abstract]:In order to study the effect of the side tower for 500 kV transmission line lightning protection effect, first by building 3 dimensional electric geometry model, from the theoretical analysis of the factors and the influence mechanism of the side needle. Then build a solid model to simulate the actual transmission line in mountain area corridor, through the test in all cases of repetitive discharge test statistics under shielding rate. The results show that adding side needle can greatly reduce the shielding failure rate; side needle length and installation angle will have an impact on the protection effect, which decreases with the increase of the length of the side needle or the installation angle, the shielding failure rate decreased. The test well confirmed the results of theoretical analysis, provides support for reference on the basis of theory and application and evaluation of tower head side needle in lightning protection transformation.

【作者单位】：上海交通大学电气工程系;华东电网有限公司;上海市电力公司电力科学研究院;
【基金】：国家自然科学基金(51307109)~~
【分类号】：TM862.1
【正文快照】： 0引言1我国电网输电线路由于输电走廊限制,往往架设于地形复杂地区,极易遭受雷击。近年来,输电线路雷击防御的薄弱环节仍十分明显,由雷击引起的跳闸相当频繁,甚至会导致较严重的电网事故。根据有关部门生产运行情况统计,全国500 kV及以上电压等级输电线路雷击跳闸率占到总线路

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