场路耦合下的输电线路杆塔反击过电压计算  

Lightning Back-Strike Overvoltage Calculation on Transmission-Line-Towers under the Field Circuit Coupled Condition

作　　者：杜欣宇[1] 谢宇廷 王江宇[1] 杨骁 

机构地区：[1]华北电力大学电力工程系,河北保定071003 [2]国网江西省电力公司赣州供电分公司.江西赣州341000 [3]重庆电力设计院,重庆400074

出　　处：《电瓷避雷器》2015年第1期128-133,共6页Insulators and Surge Arresters

摘　　要：输电线路防雷性能的评估主要是耐雷水平和雷击跳闸率的计算。针对以往雷电冲击特性场路耦合作用下输电线路接地装置传统的冲击电阻模型计算结果误差较大的缺陷,采用数据拟合和电路综合方法,建立了一种雷电频率范围内的输电线路接地装置的场路耦合宽频等效电路精准模型。在防雷性能计算中采用该模型可显著提高计算结果的准确性,对应的建模方法可供输电线路防雷设计参考借鉴。The lightning withstand level and the lightning trip-out rate are the main parts in the evaluation of transmission line lightning performance. To overcome the large error defect of calculate results in the previous traditional model of impact resistance under the field circuit coupled condition, the field-circuit coupled broadband equivalent circuit precision model of the transmission line grounding device within lightning frequency range is established by using data fitting and circuits synthesis technology. Accuracy of the calculation results in lightning protection performance calculation can be significantly improved by using the proposed model, corresponding modeling method can be used for reference in the transmission line lightning protection design. Keywords： impulse characteristic; power transmission line; tower modeling; grounding modeling; lightning protection performance

关 键 词：冲击特性 输电线路 杆塔建模 接地体建模 防雷性能 

分 类 号：TM751[电气工程—电力系统及自动化]