雷击地线档距中央的反击性能分析  

Analysis on Counterattack Performance of the Lightning Stroke at the Middle of a Span of Ground

作　　者：周志成[1] 马勇[1] 陶风波[1] 陈少波[1] 魏旭[1] 

机构地区：[1]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6期11-14,18,共5页Jiangsu Electrical Engineering

摘　　要：超高压输电线路高杆塔、大档距、交叉跨越、同塔多回、导线换相等应用越来越多,因雷击地线档距中央造成反击跳闸、地线断线等事故也较多,故研究输电线路档距中间反击耐雷性能有重要意义。利用PSCAD软件建立220 kV输电线路仿真模型,包括架空线路模型、杆塔的多波阻抗模型以及雷电流模型,从雷电流大小、雷击点位置和档距大小三方面,利用相交法和先导法计算分析了雷击档距中间地线时线路的反击耐雷性能,并用实例进行了验证。结果表明,校核线路雷击地线档距中央耐雷水平时,应以雷击档距中心位置为准,并考虑档距大小、杆塔塔头结构等因素影响。With more and more applications of high tower, span, cross-cutting, multi-circuit in one tower, wire commutation of EHV transmission lines and more and more accidents of counterattack trip and ground broken which are created by the lightning ground files from central, it is of important value to do research on counterattack the lightning protection performance of transmission lines span the middle. 220 kV transmission line simulation model including overhead line model, multi-wave impedance model tower lightning current model is built in PSCAD. Intersection and pilot method are used to analyze counterattack the lightning protection performance of lines with lightning span middle ground from three points of size of the lightning current, location of the lightning and the size of span. Examples are used to validate. It is proved that when lightning withstand level of the lightning stroke at the middle of a span of ground is checked, the location of lightning stroke at the middle of a span should be as standard with consideration of factors such as size of a span and structure of rod Tata head.

关 键 词：雷击档距中央 反击性能 PSCAD仿真模型 相交法 先导法 

分 类 号：TM863[电气工程—高电压与绝缘技术]