中文摘要：

架设同塔双回输电线路可有效解决线路走廊紧张的问题．而雷击是危及线路安全运行的主要原因。基于ATP—EMTP对1000kV同塔双回输电线路反击耐雷性能进行仿真计算和分析时．考虑更接近现场实际的多波阻抗杆塔模型，利用在频域中用有理函数近似处理和的J．Marti线路模型，同时用非线性电感模型替代单值电感进行先导闪络模型的仿真研究，考虑了前驱电流的同时避开了参数的预计算，提高了计算精度。利用统计法计算分析了冲击接地电阻、杆塔高度和工频电压因素对反击耐雷水平和跳闸率的影响。研究结果表明：随着接地阻抗的减小，杆塔高度的降低。线路反击耐雷水平提高，反击跳闸率降低；同时工频电压对线路耐雷水平有很大的影响．应予以考虑。

英文摘要：

Transmission line with double-circuit on single tower may solve the problem effectively when space for line installation is not enough with the fast development of electric power grid, and lightning is the main reason of jeopardize the operation safety in transmission line. In this paper based on the ATP- EMTP for lightning performance calculation and analysis of back flashover for 1000 kV AC transmission lines with double-circuit on single tower, consider more near scene actual of multi-wave impedance Tower model, Using in frequency domain with rational function approximate processing A （ω） and Zc J.Marti line model, while with nonlinear inductance model instead of single value inductance for pilot Flash complex model of simulation research, Considered the precursor of current while avoiding the parameters precomputation. Improve the precision of calculations, using statistical method calculation analysis the influence of the impulse grounding resistance and tower height and power frequency voltage on the counterattack resistance lightning level and tripping rate. Results showed that as the impulse grounding resistance decreases,tower height reduced, lightning counterattack performance improvement, and power frequency voltage has a lot of influence on Lightning withstand level of line, should be taken into account.