输电线路杆塔横担及斜材等效模型研究  

Equivalent Model of Cross Arm and Inclined Holder of Transmission Tower

作　　者：杜林[1] 糜翔[1,2] 肖中男[1,3] 于帅[1] 杨勇[1] 杨庆[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]重庆市防雷中心,重庆401147 [3]重庆市电力公司检修分公司,重庆400039

出　　处：《高电压技术》2012年第11期3025-3032,共8页High Voltage Engineering

基　　金：国家创新研究群体基金(51021005);国家重点基础研究发展计划(973计划)(2009CB724504);重庆市科技攻关计划(CSTC2010AC3051)~~

摘　　要：为了对雷击杆塔时的波过程进行分析,在已有杆塔主体等效模型基础上,研究了杆塔横担及斜材的等效模型。运用平行多导体等效阻抗的相关理论方法对杆塔横担的等效模型进行分析,通过在杆塔主体等效阻抗模型基础上乘以斜材修正系数的方法对杆塔斜材的等效模型进行分析,斜材修正系数包含的电容及电感修正系数分别通过分析斜材引起的电场能量及磁场能量变化来计算得到。计算结果表明,电容及电感修正系数分别为0.9895及0.8360,同时推导出斜材修正系数为0.8272。按照得到的杆塔横担及斜材等效阻抗模型计算方法,对500kVSZC3型杆塔模块化划分,建立了其雷击波过程分析研究时的等效阻抗模型。In order to analyze the wave processes in the transmission tower struck by lightning,we studied equivalent models of cross arm and inclined holder based on an existing equivalent transmission tower model.The theory of parallel multi-conductor was applied to study the equivalent tower cross arm model.The equivalent inclined holder model was derived by multiply a compensation factor of inclined holder on the equivalent impedance model of tower main body.Meanwhile,the compensation factor of inclined holder was constituted by the capacitance and inductance compensation factor which were obtained by calculating the variation of electric field energy and magnetic field energy caused by inclined holder.The values of the capacitance and inductance compensation factor were 0.9895and 0.8360,respectively,and the compensation factor of inclined holder turned out to be 0.8272.Moreover,according to the calculation method of the equivalent impedance models of cross arm and inclined holder,the equivalent impedance model of a 500kV SZC3tower was established to analyze its surge process under lightning stroke.

关 键 词：横担 斜材 波阻抗 修正系数 能量变化 杆塔模型 

分 类 号：TM753[电气工程—电力系统及自动化]