第 34 卷第 12 期电网技术 Vol. 34 No. 12 2010 年 12 月 Power System Technology Dec. 2010 文章编号: 1000-3673 ( 2010 ) 12-0142-05 中图分类号: TM 744 文献标志码: A 学科代码: 470·4051 山区输电线路雷电绕击跳闸率的计算李瑞芳,吴广宁,曹晓斌,马御棠,刘平,苏杰(西南交通大学电气工程学院,四川省成都市 610031 ) Calculation of Shielding Failure Trip-Out Rate for Transmission Lines in Mountain Areas LI Ruifang, WU Guangning, CAO Xiaobin, MA Yutang, LIU Ping, SU Jie (School of Electrical Engineering, Southwest Jiaot ong University, Chengdu 610031, Sichuan Province, China) ABSTRACT: It is very important to accurately assess shielding failure tripout rate of transmissi on lines in mountain areas for the selection and usage of lightning protection measures. Based on the typical positions of transm ission line located at mountain range, calculation formulae for corresponding shielding failure tripout rates are derived. Taking 220 kV transmission line with two overhead ground wires for example, both maximum shielding failure lightning current of transmission line located at different positions of the mountain range and the variation of shielding failure tripout rate with the dip angle of ground are calculated, and the calculation results are available for reference to lightning protection of transm ission lines in mountain area
山区输电线路雷电绕击跳闸率的计算 来自淘豆网m.daumloan.com转载请标明出处.
