平原和山区同塔双回特高压输电线路雷击特性模拟试验Scaled Model Test on Lightning Stroke Performance of UHV Double-Circuit Transmission Lines in Plain and Mountain Areas
鄂盛龙;文习山;蓝磊;王羽;安韵竹;戴敏;李志军;叶奇明;
摘要(Abstract):
雷击是造成输电线路故障的主要原因之一,为研究平原和山区特高压输电线路遭受雷击的差异性,以1:12.5比例缩小的特高压SZ322型塔为研究对象,利用负极性80/2 500μs操作冲击电压.波,分别展开了平地和山区2种不同地形条件下的缩比线路雷击模拟放电试验,并结合空间静电场分布仿真计算对2种地形上放电路径分布的差异性进行定性分析。试验及仿真结果表明:平原和山区2种地形上放电路径选择性存在明显的差别,输电线路附近遭受雷击时,相对于平原上,斜山坡上输电线的电场强度更大,且下行先导头部的电场强度最大区域明显向输电线路侧偏移,因此山区的输电线更容易遭受雷击,大地的屏蔽效果差。当放电间隙尺寸增大时,结论依然成立,且2种地形上线路的绕击率差距增大,但两者的绕击率均下降,同时大地的屏蔽效果增强。研究结果对特高压输电线路雷电防护工作具有一定的参考意义。
关键词(KeyWords): 特高压;雷击特性;模拟试验;地形;放电路径;静电场计算
基金项目(Foundation): 中国博士后科学基金项目(2014M560624)~~
作者(Author): 鄂盛龙;文习山;蓝磊;王羽;安韵竹;戴敏;李志军;叶奇明;
Email:
DOI: 10.13335/j.1000-3673.pst.2015.01.018
参考文献(References):
- [1]钱冠军,王晓瑜,丁一正,等.500 k V线路直击雷典型事故调查研究[J].高电压技术,1997,23(2):72-83.Qian Guanjun,Wang Xiaoyu,Ding Yizheng,et al.Investigation of typical direct lightning strike incidents on 500 k V lines[J].High Voltage Engineering,1997,23(2):72-83(in Chinese).
- [2]李培国.国外对特高压输电线路雷击跳闸原因的一个新观点[J].电网技术,2000,24(7):63-65.Li Peiguo.A new viewpoint about lightning trip-out of UHV transmission lines[J].Power System Technology,2000,24(7):63-65(in Chinese).
- [3]Brown G W,Whitehead E R.Field and analytical studies of transmission line shielding part II[J].IEEE Trans on Power Apparatus and System,1969,88(5):617-626.
- [4]李瑞芳,吴广宁,曹晓斌,等.山区输电线路雷电绕击跳闸率的计算[J].电网技术,2010,34(12):142-146.Li Ruifang,Wu Guangning,Cao Xiaobin,et al.Calculation of shielding failure trip-out for transmission lines in mountain areas[J].Power System Technology,2010,34(12):142-146(in Chinese).
- [5]Dellera L,Garbagnati E.Lightning stroke simulation by means of the leader progression model,part I:Description of the model and evaluation of the exposure of free-standing structures[J].IEEE Trans on Power Delivery,1990,5(4):2009-2017.
- [6]Dellera L,Garbagnati E.Lightning stroke simulation by means of the leader progression model,part II:Exposure and shielding failure evaluation of overhead lines with assessment of application graphs[J].IEEE Trans on Power Delivery,1990,5(4):2023-2029.
- [7]Farouk A M,Rizk.Modeling of transmission line exposure to direct lighting strokes[J].IEEE Trans on Power Delivery,1990,5(4):1983-1997.
- [8]王晓瑜.雷电屏蔽性能的模拟试验和分析模型的研究[J].高电压技术,1994,20(2):48-54.Wang Xiaoyu.Simulation test and analysis model of lightning shielding[J].High Voltage Engineering,1994,20(2):48-54(in Chinese).
- [9]王羽,文习山,蓝磊,等.模型比例对架空输电线路雷电屏蔽模拟试验的影响[J].高电压技术,2013,39(2):443-449.Wang Yu,Wen Xishan,Lan Lei,et al.Effects of model scale on lightning shielding simulation test of overvoltage transmission lines[J].High Voltage Engineering,2013,39(2):443-449(in Chinese).
- [10]安韵竹,蓝磊,文习山,等.大尺寸特高压输电线路雷电屏蔽性能模拟试验影响因素[J].电网技术,2014,38(5):1385-1389.An Yunzhu,Lan Lei,Wen Xishan,et al.Impacting factors of large-sized model test for lightning shielding performance of UHV transmission lines[J].Power System Technology,2014,38(5):1385-1389(in Chinese).
- [11]郑家松,李广福,季征南,等.山区500 k V输电线路雷电屏蔽性能模型试验研究[J].高压电器,2009,45(5):119-122.Zheng Jiasong,Li Guangfu,Ji Zhengnan,et al.Small-scale model experimental study on lightning shielding performance of 500 k V transmission lines in mountain area[J].High Voltage Apparatus,2009,45(5):119-122(in Chinese).
- [12]蓝磊,邓维,黄文武,等.平原地区500 k V输电线路雷电屏蔽性能的模型试验研究[J].电网技术,2006,30(9):72-76.Lan Lei,Deng Wei,Huang Wenwu,et al.Small-scale model experimental study on lightning shielding performance of 500 k V transmission lines in plain area[J].Power System Technology,2006,30(9):72-76(in Chinese).
- [13]Bazelyan E M,Raizer Y P.Lightning physics and lightning protection[M].London:Academic Press,2000:90-136.
- [14]王羽,李志军,戴敏,等.长空气间隙负极性操作冲击放电特性研究(I)—试验研究[J].中国电机工程学报,2014,34(21):3534-3540.Wang Yu,Li Zhijun,Dai Min,et al.Research on typical long air gaps with negative switching impulses(II)-Experiments[J].Proceedings of the CSEE,2014,34(21):3534-3540(in Chinese)
- [15]安韵竹,戴敏,李志军,等.长空气间隙负极性操作冲击放电特性研究(II)-间隙系数[J].中国电机工程学报,2014,34(24):4145-4151.An Yunzhu,Dai Min,Li Zhijun,et al.Research on typical long air gaps with negative switching impulses(II)-gap factor[J].Proceedings of the CSEE,2014,34(24):4145-4151(in Chinese).