无源三级RC积分器特性的计算

Calculation of characteristics for 3-stage passive RC integrators

本文提供了无源三级RC积分器电路的电压转移函数H(s),并且说明了通过拉普拉斯变换计算微分积分测量系统和三级RC积分器特性的方法。这种积分器作为微分积分测量系统的重要组成部分,可用来测量雷电冲击电压。文中显示了一组改善了特性的三级RC无源积分器电路的参数和它的特性计算结果。由它组成的微分积分测量系统测量雷电冲击电压的波形误差值很小。所建议的三级RC无源积分器与罗哥夫斯基线圈相结合,还可以用作雷电冲击电流的测量。

The voltage transfer function H（s） of the 3-stage passive RC integrator is provided.The calculating method using Laplace transform for the characteristic of the integrator and the differentiating-integrating （D/I） measuring system is introduced.As an important part of the D/I system,this integrator can be used for measuring the lightning impulse voltage.A group of improved 3-stage RC integrator parameters and its characteristic calculation results are presented.The measuring error for the lightning impulse using this D/I system with the 3-stage improved RC integrator is extremely low.This improved 3-stage RC integrator can also be used to measure lightning impulse current when it is combined with the Rogowski coil.