10kV配电线路防雷保护间隙的设计

Design of lightning protection gap for 10kV distribution line

进入新世纪以来,我国的电力事业取得了较大的发展,特别是在配电线路的运行研究方面,可以说是取得了突出的成绩。在整个电力系统工程中,10 k V配电线路最接近用户,所以应是最安全的一级,可是它在整个电力系统工程中是绝缘水平相对低的线路,作为中低压架空线路也很少实施防雷措施。笔者研究了10 k V绝缘导线的工作原理,研究了防雷保护间隙与绝缘子的配合,在此程中使用ANSYS软件进行了模拟,在经受雷电的作用以后,具体的电压放电和电压等级分布等进行了深入的分析,防雷保护的具体间隙值被准确测定。设计的防雷保护间隙在无雷击保护时,无电压产生,遇到雷击时会立即彻底放电,因此不会损害绝缘子,线路这样能在电击时过电压状态下安全平稳地运行。

Since entering into the new century,the electric power industry in our country has made great progress,especially in the operation of the distribution line,it can be said that the outstanding achievements.In the whole power system engineering,10 kV distribution line closest to the user,it should be is the most safe level,but it is in the whole power system engineering is relatively low levels of line insulation,as in low voltage overhead line also rarely implemented lightning protection measures. On the 10 kV insulated conductor of the working principle,the lightning protection gap and the insulator, in this process using ANSYS software to simulate the,after the lightning withstand the role,the specific discharge voltage and the voltage level of distribution of the in-depth analysis and specific gap lightning protection value is accurately determined.Design of parallel gap lightning protection device in the lightning protection, no voltage is generated,encountered by lightning will immediately and completely discharge,so will not damage the insulator.This line can in shock over voltage state under safe and stable operation.