降低雷电流陡度方法的研究

Study on Method to Reduce the Lightning Current Steepness

针对雷电电磁脉冲及噪声对电子信息系统电子设备造成的干扰等问题,通过对低压输电线路电磁干扰滤波器的理论分析,采用Multi Sim仿真软件建立雷电电磁脉冲入侵电子信息系统仿真模型。仿真结果表明,在电子设备的电源防护电路中串电感并电容,可以有效地降低雷电电磁脉冲对电子设备造成的危害。对滤波器进行的模拟雷电流冲击试验表明,在低压输电线路串电感并电容能够降低感应过电压的幅值、雷电波陡度以及SPD残压。试验结论与仿真结果基本吻合,为电子设备防雷提供了理论及数据依据。

According to the lightning electromagnetic pulse and noise interference on electronic information system, by means of the theory analysis of low voltage power line EMI filter, using MultiSim simulation software, the thunder and lightning electromagnetic pulse electronic intrusion information system simulation model was established. The simulation results show that the line in the power electronic equipment installed of L and C, can effectively reduce the lightning electromagnetic pulse harm caused to the electronic equipment. And the filter were simulated by lightning current impulse test, which verifies in the low voltage power line installing L and C can reduce the amplitude of induced overvohage and lightning wave steepness, and reduce the residual voltage of SPD. The experimental results agree well with the simulation results, which provides a theoretical basis for the lightning protection of electronic equipment.