互感器宽频传递特性的散射参数测量法

The Scattering Parameter Method for Measuring the Wide-Band Transfer Characteristics of the PT

为了建立互感器的宽频电路模型,准确预测变电站内由开关操作对二次设备形成的传导干扰,需要先知互感器的宽频传递特性。本文提出测量电压互感器宽频传递特性的散射参数方法,并对测量结果进行级联分析,消除引线误差,最终得到该互感器的散射参数。测量结果表明,该方法与脉冲法的测量结果一致,且测量结果信噪比高、范围宽,方法简单快捷。

For setting up the electric circuit models of the PT and forecasting the conducted interference of secondary circuits due m routine operations in substation, the wide-band transformer functions should be obtained at first. In this paper, the scattering parameter method and the cascade analysis for measuring the wide-band transformer characteristics are presented, The result proves that it is consistent with the impulse method and can get the higher SNA, wider range, so it＇s a simpler and speed method than others.