输电线路杆塔模型研究现状及雷电反击过电压计算  

Summary of Transmission Tower Models and Calculation of Back Flashover Lightning Overvoltage

作　　者：刘杰[1] 刘春[1] 周初蕊[1] 曾莼[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《电瓷避雷器》2013年第6期81-86,90,共7页Insulators and Surge Arresters

摘　　要：介绍了目前常用的集中电感模型、单一波阻抗模型、多波阻抗模型等输电线路杆塔模型。在理论分析的基础之上,结合500 kV双回输电线路杆塔在ATP/EMTP程序中建立了集中电感、单一波阻抗、无损多波阻抗和有损多波阻抗等4种杆塔模型。通过雷电反击过电压波形及过电压幅值和时间关系给出了一般性结论,即电感模型过电压值比较大,达到最大过电压的时间较短;波阻抗模型在模拟雷电过电压计算中,更接近实际情况;无损多波阻抗模型由于有具体的计算公式,相对于需要测量波阻抗的有损多波阻抗模型来讲,在分析中具有可操作性强,方便计算等优势。Lumped inductance model, single surge impedance model and multi-surge impedance model etc. are described in this paper, which are currently used to transmission line tower model. Basis of theoretical analysis, combined with 500kV double circuit transmission line towers, lumped inductance, single surge impedance, lossless multi-surge impedance and loss surge impedance of four tower model are built in the ATP/EMTP program . Through the back flashover lightning overvohage waveform obtained from the program, the general conclusion is obtained, in which the overvoltage of lumped inductance is relatively high, the time to the maximum overvoltage is short. Surge impedance model is closer to the actual situation on＇the simulation of lightning overvoltage calculation. Because of the lossless multi-surge impedance has specific formula while the loss multi-surge impedance model need to measure the surge impedance, the former has advantage of operability and convenience of calculation on analysis.

关 键 词：防雷保护 输电线路 杆塔 波阻抗模型 ATP EMTP 

分 类 号：TM862[电气工程—高电压与绝缘技术]