基于改进电气几何模型同塔多回输电线路绕击跳闸率计算  

The Improved EGM Model-Based Calculation Method for Shielding Failure Trip-out Rate of Multi-circuit Transmission Lines at the Same Tower

作　　者：李兴[1] 李化[2] 张孝波[2] 李黎[2] 

机构地区：[1]中国南方电网超高压输电公司,广州510663 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《南方电网技术》2013年第4期55-59,共5页Southern Power System Technology

摘　　要：由于传统的电气几何模型基于单根导线和地线进行分析计算,对输电线路绕击跳闸率计算结果不够准确,提出一种基于改进的电气几何模型的新算法。该算法计及同塔多回输电线路避雷线、多导线系统以及大地之间的相互屏蔽作用,并考虑了雷电流的幅值和雷电流入射角等对绕击跳闸率的影响。As the calculated result for shielding failure trip-out rate of the transmission lines is not accurate enough due to the classic EGM based on the single transmission line and single ground line, this paper proposes a new calculation method based on a improved electro-geometric model （EGM）. The new method takes the mutual shielding effects among the grounding lines, multi-lines and the ground into account as well as the influence of the amplitude and angle of lightning current on the rate.

关 键 词：电气几何模型 多回输电线路 雷电流 绕击率 击距 

分 类 号：TM863[电气工程—高电压与绝缘技术]