雷电屏蔽模型在线路雷击分析中的应用  

Application of Lightning Shielding Model for Analyzing Lightning Stroke of Transmission Line

作　　者：温生[1] 马勇[2] 周志成[2] 

机构地区：[1]南京供电公司,江苏南京210041 [2]江苏省电力公司电力科学研究院,江苏南京211103

出　　处：《江苏电机工程》2012年第1期16-20,共5页Jiangsu Electrical Engineering

摘　　要：绕击是输电线路雷击跳闸的主要原因,研究雷电屏蔽模型对线路雷电绕击计算及分析具有重要意义。详细阐述了几何法、电气几何模型法和物理模型法在绕击计算中的特点和应用条件,并对220 kV输电线路典型杆塔进行了绕击耐雷性能计算分析和比较。结果表明,几何法来源于小模型试验,与实际应用有一定差距;电气几何模型和物理模型计算得到的结果基本一致,都具有较强的工程应用性。Shielding failure is the principal cause of lightning trip fault on transmission line,so it is very important to study the lightning shielding model for the calculation and analysis of the lightning shielding.This paper elaborates on the characteristics and application conditions of Geometric Method,Electro Geometric Models and Physical Models in detail.Then lightning protection performance of shielding failure on 220kV transmission line with three different models are analyzed and compared with.The results indicate that Geometric Method derived from small model experiment has a certain distance with practical application.Results obtained by Electro Geometric Models and Physical Models are in substantial agreement,so both are with highly practicability.

关 键 词：雷电屏蔽模型 几何法 电气几何模型法 物理模型法 绕击 

分 类 号：TM863[电气工程—高电压与绝缘技术]