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测量军用设备、工业设备和用户设备电源线上频率在150千赫至30兆赫范围内的传导干扰电压,通常都是使用电源线线路阻抗稳定网络进行的,近年来则采用电流探头技术进行测量。本文介绍一些与电源线传导干扰测量技术有关的基础知识,以及确定 LISN 和电流探头这两种测量设备对所测传导干扰电平的影响的研究结果。文中确定了一个有利于预测这种影响的模型这个模型概念可以使本文中介绍的方法扩展到其他阻抗稳定网络。文中对计算得出的电平和实验测得的电平差作了比较,并给出了一个确定对传导干扰电平影响大小的分析方法。
Conducted interference voltages measured in the 150 kHz to 30 MHz frequency range on military, industrial, and consumer equipment power lines are typically measured using the line impedance stabilization network of the power line and current probe technology in recent years. This article presents some basic knowledge about powerline conducted interference measurement techniques and the results of studies that determine the effects of both LISN and current probes on the measured conducted interference level. The paper identifies a model that is good for predicting this effect. The model concept extends the approach described in this article to other impedance stabilization networks. In the paper, the calculated level is compared with the experimentally measured level difference, and an analytical method of determining the influence on the conducted interference level is given.