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	输电线路杆塔雷电冲击阻抗及等效二端口电路模型分析
	赵媛 ; 李雨 ; 邓春 ; 何金良 ; ZHAO Yuan ; LI Yu ; DENG Chun ; HE Jinliang
	2016-03-30 ; 2016-03-30
关键词	杆塔 雷电反击 冲击阻抗 频率响应 矢量匹配法 二端口网络 surface texture corona discharge corona inception voltage radio interference audible noise roughness coefficient TM862
其他题名	Analysis of Lightning Surge Impedance and Two-port Circuit Model of Transmission Tower
中文摘要	在输电线路反击耐雷性能仿真中需要建立合理有效的杆塔等效模型。为此,基于电磁场数值计算方法和矢量匹配法研究了输电线路杆塔冲击阻抗和等效电路的建立方法。首先采取电磁场数值软件分析了杆塔的阻抗频域特性函数,再将计算得到杆塔频率响应利用矢量匹配法进行了有理函数拟合,然后用网络综合的方法建立了杆塔二端口等效电路模型,并用PSCAD电磁暂态程序进行了仿真验证。研究表明:该方法可以应用在杆塔的任意2点上,建立对大地的二端口等效电路模型,从而求得杆塔上任意点遭受雷击时杆塔上任意部位的电位变化情况,进而能够模拟可能的放电通道过电压情况,以可用于分析输电线路杆塔雷电反击过程。; A proper equivalent model of tower is essential for simulating back strikes of transmission lines. Hence, on the basis of numerical calculating methods of electromagnetic field and the vector fitting method, we presented a method of how to establish the surge impedance and equivalent circuit of transmission towers. Firstly, using numerical simulation software, we analyzed the impedance characteristic function of transmission tower in frequency domain. Then, the obtained frequency response of tower was further fitted into a rational function using the vector fitting method, and the equivalent tower circuit model was obtained using the network synthesis method. Finally, the equivalent model was tested by simulations in PSCAD. It is obtained that the proposed method can be applied to any two points on a tower and hence to establish a two-port circuit model. We can use the model to get the potential of any part of the tower when it is stricken by lightning, and then to simulate the possible overvoltage discharge channels effectively, which is fundamental for analyzing back striking of lightning.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/142604]
专题	清华大学
推荐引用方式 GB/T 7714	赵媛,李雨,邓春,等. 输电线路杆塔雷电冲击阻抗及等效二端口电路模型分析[J],2016, 2016.
APA	赵媛.,李雨.,邓春.,何金良.,ZHAO Yuan.,...&HE Jinliang.(2016).输电线路杆塔雷电冲击阻抗及等效二端口电路模型分析..
MLA	赵媛,et al."输电线路杆塔雷电冲击阻抗及等效二端口电路模型分析".(2016).

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