500kV升压站雷电反击侵入波过电压的影响因素研究  

Research on Influencing Factors of Lightning Back-Strike Intruding Overvoltage of 500 kV Substation

作　　者：王建南[1] 蒋昆 骆仁意 

机构地区：[1]国网浙江省电力公司宁波供电公司,浙江宁波315010 [2]重庆电力科学研究院,重庆401123 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《中国电力》2015年第6期72-79,共8页Electric Power

基　　金：国家创新研究群体基金资助项目(51021005)~~

摘　　要：为了合理选择变电站雷电侵入波过电压的防护措施,基于正交设计试验方法及ATP-EMTP仿真计算,以某500kV变电站为例．研究了反击侵入波过电压各主要影响因素的影响程度（用显著性水平F值来衡量）及部分影响因素的敏感水平区间。计算结果表明，系统运行方式、1号至0号杆塔距离、TV（电容式电压互感器）装设情况、避雷器至设备距离、雷击点位置以及杆塔冲击接地电阻的显著性水平F值之比为5．56：2．13：1．00：4．64：24．58：7．58；将杆塔冲击接地电阻由10Ω降至5Ω，控制1号至0号杆塔距离为200m左右。加强进线段0～900m的防雷击保护,可显著降低反击侵入波过电压水平。In order to reasonably choose lightning intruding overvoltage protection measures, the influencing strength （expressed by the significance level F） and sensitivity range of the main factors of lightning back-strike intruding overvohage are studied with orthogonal experimental design （OED） method and ATP-EMTP simulation by taking a 500 kV substation as an example. The calculated results show that the ratio of F values between system operation and system parameters, including the distance between No 1 and No 0 tower, the installation location of CVT, the distance between arrester and equipment, the lightning point and tower impulse grounding resistance, are 5.56, 2.13, 1.00, 4.64, 24.58, 7.58 respectively. Meanwhile, several measures, including lowering the impulse grounding resistance of tower from 10 Ω to 5 Ω, setting the distance between No 1 and No 0 tower as around 200 m, and improving the lightning protection of the incoming line segment of 0～900 m, can significantly reduce the level of lightning back-Strike intruding overvohage.

关 键 词：变电站 雷电侵入波 过电压 ATP-EMTP 多波阻抗模型 正交设计 

分 类 号：TM862[电气工程—高电压与绝缘技术]