摘要
对于电力行业标准(DL/T620-1997)推荐的计算方法-规程法,在对输电线路反击耐雷水平进行分析时,将杆塔视为一等值电感,杆塔上任意点的电位相同,既不能反映雷击塔顶时雷电流在杆塔上的传播过程,以及反射波对杆塔各节点电位的影响,也不能反映绝缘子串上电压随时间的变化过程,因此,规程法的计算是一种简化的计算方法,与实际的雷击过程有一定的差距。同时,用Monte Carlo法计算雷击跳闸率时,对于雷击中部位不仅难以确定,而且目前尚无统一的判据。应用基于与频率相关的JMARTI模型利用ATP-EMTP程序来研究输电线路的反击耐雷性能[1-3]。
For the computing method,the code method proposed by electric industry standard（DL/T62-1997）,when counteracttack thunder-resisting level to transmission lines is analyzed,should regard a pole as substitutional inductance.The electric potential of arbitrary point on the pole is equal.It can not only reflect the propagation course of the current on the pole when thunder stricks the pole top and the effect of the reflection wave on the node potential of the pole,but the course of the voltage change with time of the insulation chain.So,the calculation of the code method is a simplified calculation method,being of gap from actual thunderstroke.Meanwhile when we use Monte Carlomethod to calculate the grip rate of thunderstroke,it is difficult to assign thunderstroke point and no unified criteria at present.Use ATP-EMTP program to study the conterattack thunder-resisting performance of the transimission lines applied based on JMARTI model related to the frequency.
出处
《电气开关》
2010年第4期47-50,共4页
Electric Switchgear
关键词
输电线路
耐雷水平
计算模型
ATP-EMTP仿真分析
transimission line
thunder-resisting level
calculation model
simulation analysis of ATP-EMTP
