提高架空配电线路耐雷水平的仿真分析  

Simulation Analysis on Improving Lightning Withstanding Level of Overhead Distribution Lines

作　　者：王羽[1] 文习山[1] 蓝磊[1] 张露[1] 陈楠[1] 郭卫[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《高电压技术》2011年第10期2471-2476,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724500)~~

摘　　要：为了提高配电网抵御雷电灾害的能力,通过定量计算,提出了有效的防雷措施。利用ATP-EMTP仿真软件,结合规程算法计算几种绝缘子配置方案下的耐雷水平。采用数值计算方法,借助Fortran语言,建立了有限长线路两端接非线性负载时的感应雷过电压数学模型,计算氧化锌避雷器(MOA)安装间距与线路闪络降低百分数之间的关系曲线。结果表明:绝缘子采用不平衡布置时,6/10kV线路雷击跳闸率降低了84.2%,35kV线路降低不明显,建议采用复合绝缘子,雷击跳闸率可降低34.5%。多(少)雷区较之没有安装MOA时,6/10kV和35kV线路每300m(600m)安装1组避雷器分别可降低感应雷事故75%和81%(59.4%和69.9%)。计算结果为配电网线路防雷设计、改造提供了参考依据。In order to improve the lightning protection ability of distribution network and to calculate the protection effect of the lightning protection measures quantitatively, combining with the regulation method, we calculated the withstanding level of lightning in different insulation dispositions by ATP-EMTP simulation software, and established a mathematical model of inductive lightning over-voltage when there is nonlinear load between two ends of finite lines. Moreover, using numerical method which refers to the Fortran language, we calculated the curve between the installation distance of the MOA and the reduction percentage of flashover. Calculation results show that, when using asymmetric insulator dispositions, the lightning trip-out rate of 6/10 kV transmission lines will decrease by 84. 20/00; but the effect is not obvious on 35 kV lines. Therefore, we suggest that combined insulators should be used on 35 kV transmission lines, with which the lightning tripout rate will be decreased by 34.5 %. Compared to the heavy （light ） lightning area without arrester, the percentages of inductive faults decrease by 75 % and 81 % （59.4 % and 69.9 %）respectively when a pair of arrester is installed every 300 m （600 m）on 6/10 kV and 35 kV transmission lines. Calculated results provide references for the design and reform of lightning protection on the distribution lines.

关 键 词：架空配电线路 耐雷水平 氧化锌避雷器 ATP EMTP 数值计算 FORTRAN 

分 类 号：TM862[电气工程—高电压与绝缘技术]