基于4次线性微分方程的雷电冲击试验波形分析

当冲击试验电压高时,冲击试验电压的波形叠加过冲和振荡。这是由于冲击试验回路的残余电感、被试设备的大杂散电容或二者共同作用产生的。文章用4次微分方程式对振荡冲击试验的等值回路进行了分析,结果表明,波形可分为非振荡波头、振荡波头、非极性反转波尾、非振荡的极性反转波尾和振荡极性反转波尾5个部分。非振荡的极性反转波尾和振荡极性反转波尾的产生原理是不同的。波形的高频分量定义为振荡波形,非振荡波形是不含振荡波形成份的波形。文章的研究结果是后者的产生原因和等值电阻、等值电感的关系以及4次方程的根有关。文章给出了它们之间的关系。

Analysis of Lightning Impulse Waveforms Given by a Fourth-Order Linear Differential Equation

As the impulse test voltage increases, the waveform of the impulse test voltage is superposed on overshoot or oscillation. This is caused by residual inductance in the impulse test circuit and/or large stray capacitances in the test equipment. This paper describes an analysis of the equivalent circuit of the oscillating impulse test using a fourth linear differential equation. The analysis shows that the waveform is classified into three patterns: a nonoscillating impulse wave, a single-oscillating wave and...