1) shielding failure flash-over rate
反击跳闸率
2) Back Striking
反击
1.
Study on the Lightning Protection Performance of Back Striking for Double-circuit Transmission Line Based on Distributed Line Tower Model;
基于分段传输线模型的同杆双回线路反击耐雷性能研究
2.
Based on both multi-wave impedance model of towers and lightning leader development based lightning shielding model, the lightning withstand performances of back striking, shielding failure for ±800kV UHVDC transmission line as well as related influencing factors are analyzed.
基于杆塔的多波阻抗模型和基于先导发展的雷电屏蔽模型,分析了云广±800kV特高压直流输电线路的反击、绕击耐雷性能及其影响因素。
3.
This paper details the lightning protection performance of back striking for an AC 500 kV double-circuit transmission line by EMTP.
利用EMTP程序对同杆双回交流500kV输电线路的反击耐雷性能进行了详细的计算和分析,并考虑到雷击塔顶时导线上交流周期电压的随机性,提出了利用统计法确定超高压线路的反击耐雷性能。
3) Backflashover
反击
1.
At first,whether shielding failures or backflashovers causing the line insultor flashover should be ascertained.
以一条110kV传输线路为例,说明制定线路避雷器安装方案的原则:首先区分线路绝缘子闪络是由反击还是绕击引起的;线路避雷器的安装主要以保护易遭受雷击的个别杆塔为目的,除此之外,应兼顾整条线路耐雷水平的提高。
4) counterattack
反击
1.
Geographic, geomorphologic and weather characteristics of transmission line inmountain areas, especially the generation mechanism of lightning counterattack and lighting bypass strike are introduced.
探讨了山区送电线路雷电“绕击”事故发生的地理、地貌和气象特征,以及山区送电线路在防止“反击”及“绕击”事故方面存在的不足,提出了“侧向避雷针”防止绕击的防雷保护新措施,以及降低杆塔接地电阻防止“反击”事故、采用线路避雷器等山区送电线路防雷的综合技术措施。
2.
By looking through many documents and watching different lecvels soccer games,this essay explores the chances to counterattack from defenes of corner kicks.
通过查阅文献对不同水平足球比赛的观察和分析 ,针对比赛中如何利用对方发角球后获得反击的机会进行综合分析。
3.
This article will focus on the attributes of counterattack,the factors influencing the counterattack of the competitors,adding the real cases of competition.
以对竞争对手的对策进行预测为主要内容 ,对竞争预测的重要内容如反击属性、影响竞争者反击的因素等进行了重点讨论 ,并辅之以企业竞争实例。
5) return stroke
反击
1.
Considering the importance of 500 kV line and taking 500 kV transmission line in Chongqing as an example, the authors calculate lightning strike outage rate (including return stroke and lightning shielding failure) using regulation method, outage rate of return stroke using travelling wave method, and outage rate of lightning shielding failure using EGM.
鉴于 5 0 0kV线路的重要性 ,以重庆地区 5 0 0kV自渝输电线路为例 ,针对其特殊的地形、地貌 ,用规程法计算线路的雷击跳闸率 (包括反击和绕击 )、行波法计算线路的反击跳闸率、击距法计算线路的绕击跳闸率 ,分析影响雷击跳闸率的主要因素 ,比较计算结果 ,找出绝缘薄弱点、雷电易击段 ,并提出相应的改进措施。
6) Back flashover
反击
1.
Lightning performance calculation and analysis of back flashover for 500 AC transmission lines with quadruple-circuits on single tower are obtained by EMTP(Electromagnetic Transients Progr.
通过电磁暂态计算程序(EMTP)对500 kV交流同杆四回输电线路的反击过程进行了仿真计算和分析,得到线路在不同条件下的反击耐雷水平和跳闸率;分析了杆塔高度、冲击接地电阻以及避雷线的设置情况等因素对反击耐雷性能的影响。
2.
Based on theories of shielding failure and back flashover,the testing equipment of magnetic card is suggested to be fixed on different positions of the tower.
根据雷电绕击和反击机理,提出可在杆塔不同部位加装磁卡测试设备,将获得的雷电流幅值、最大陡度等参数进行数据分析,得出线路绕击、反击的判别方法。
3.
However the differentiation of lightning shielding failure accidents and back flashover accidents on high- voltage transmission line is more important.
然而在研究上述问题中线路绕击、反击事故的判别尤为重要,只有正确的完成判断,电力系统防雷才能做到有的放矢、事半功倍。
参考词条
补充资料:电导率(见电阻率)
电导率(见电阻率)
conductivity
d!日nd日O}已电导率(eonduetivity)见电阻率。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。