1) the Improved EGM
改进电气几何模型
1.
The theoretical analysis of the lightning withstand performances for shielding failure back ,using the Improved EGM which could take the effect of AC operating voltage into account, mainly analyze the influence of AC operating voltage to V-S characteristics of insulator,and calculate round-strike switching rate with strike moment method.
运用考虑工作电压的改进电气几何模型对输电线路绕击性能进行了分析,着重分析工作电压对绝缘子伏秒特性的影响,运用PSCAD/EMTDC软件建立考虑工频电压的绝缘子伏秒特性模型,得出绝缘子绕击耐雷水平,采用击矩法计算绕击跳闸率;运用杆塔波阻抗模型分析输电线路反击性能,建立了杆塔等效波阻抗的线段模型,用PSCAD/EMTDC软件仿真计算反击跳闸率,并将结果与规程法进行了比较。
2) improved electro-geometrical model
改进电气几何模型法
3) EGM
电气几何模型
1.
The Improved EGM for Computation of the Shielding Failure Rate on 500 kV Transmission Line;
改进电气几何模型计算500 kV输电线路绕击率
2.
Experimental methods and models were analyzed,such as standard method,electrical geometric model(EGM),leader progression model(LPM) and shielding failure probability model.
分析了几种雷电绕击研究方法或模型,如规程法、电气几何模型、先导发展模型、绕击概率模型。
3.
The lightning performance of quadruple-circuit transmission line with dual voltage 500/220 kV on the same tower is calculated and analyzed with EGM(Electro-geometrical Model) and EMTP(Elector-Magnetic Transient Program).
为准确评估500/220 kV同塔混压四回输电线路的耐雷性能,在采用改进电气几何模型(EGM)与电磁暂态程序(EMTP/ATP)计算其绕、反击跳闸率后分析了避雷线保护角、杆塔呼称高度、地面倾角等对5002、20 kV线路绕击耐雷性能的不同影响及杆塔呼称高度、接地电阻、耦合地线架设方式等对500、220 kV线路反击耐雷水平的不同影响。
4) electric geometry model (EGM)
电气几何模型
1.
The performance of shielding failure of 500 kV quadruple-circuit overhead AC transmission lines on the same tower with the revised electric geometry model (EGM) method is analyzed, and the problem of shielding for transmission lines by ground wires is discussed.
为研究同塔4回输电线路绕击耐雷性能,采用改进电气几何模型对其进行了分析。
5) electric geometry method
电气几何模型
1.
It is not reasonable that striking distances of lightning leader to phase conductor, ground line and the ground are equal in classical electric geometry method (EGM).
针对经典电气几何模型认为雷电先导对导线、避雷线、大地三者之间击距相等的不合理问题,提出了用击距系数来描述雷电先导对导线与大地击穿强度的差别;依据长间隙放电与雷击放电的相似性,开展了棒-板间隙实验以得到击中目的物概率为50%时雷电先导与地面、导线之间的位置关系。
2.
Two calculation methods are analyzed and compared in this paper:the standard method and electric geometry method (EGM).
绕击是1000 kV特高压输电线路雷击跳闸的主要原因,为探讨此问题,分析并比较了目前输电线路绕击计算方法—规程法与电气几何模型法,指出电气几何模型将雷电的放电特性与线路的结构尺寸结合起来,很好解释了线路屏蔽失效现象,用于特高压的绕击计算中,并依据电气几何模型的原理提出减小1000kV线路绕击跳闸率的措施:减小避雷线保护角、安装可控放电避雷针、架设旁路屏蔽地线。
6) electrogeometric model
电气几何模型
1.
The electrogeometric model (EGM) described with striking distance has been widely used in the shielding failure analysis of transmission line.
使用击距描述的电气几何模型广泛用于输电线路的雷电绕击分析。
补充资料：改进
改变旧有情况，使有所进步：～工作ㄧ操作方法有待～。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条