1000kV交流输电线路绕击率的计算方法  

Lightning stroke ratio algorithm for 1000 kV AC transmission line

作　　者：彭谦[1] 李军[1] 康东升[1] 卞鹏[1] 王晔[2] 

机构地区：[1]国核电力规划设计研究院,北京100032 [2]中国电力科学研究院,北京100192

出　　处：《中国电力》2010年第8期57-60,共4页Electric Power

摘　　要：分析了现有3种雷电绕击计算方法的优缺点,选用电气几何模型法计算1 000 kV交流输电线路雷电绕击率。若用传统电气几何模型法计算,需求解多个二元二次方程组,计算复杂;根据平面几何理论,构造以半径、夹角为变量的圆弧方程,改进了传统电气几何模型法雷电绕击概率方程,并提出圆弧夹角的计算方法。计算结果验证了应用改进方法的正确性;针对1 000 kV输电线路,研究了地线保护角、地面倾斜角和杆塔呼高对雷电绕击率的影响。Advantage and disadvantage of three kinds of lightning prevention algorithms were analyzed and the electrical geometry model algorithm was used to calculate the lightning stroke ratio of 1 000 kV AC transmission line. Many binary quadrie equations should be resolved while using traditional electrical geometry model algorithm. This method is complex. According to plane geometry theory, the radius and angle variables were used to formulate equations of arc in this paper. The lightning stroke ratio equation of traditional electrical geometry model algorithm was mended and the angle calculation method of the arc was derived. The calculation result proved the modification algorithm to be right. In the end, influence of the lightning stroke ratio was studied depending on different conditions of earth wire protection angle, earth angle and tower height of 1000 kV transmission line.

关 键 词：电气几何模型法 1 000kV输电线路 雷击 

分 类 号：TM863[电气工程—高电压与绝缘技术]