distance relay- finds impedance value of transmission line

The Smith Chart is a fantastic tool for visualizing the impedance of a transmission line and antenna system as a function of frequency. Smith Charts can be used to increase understanding of transmission lines and how they behave from an impedance vie

气体放电管、放电间隙、高频二极管、压敏电阻、瞬态二极管、晶闸管、高低通滤波器等元件根据不同频率、功率、传输速率、阻抗、驻波、插损、带宽、电压、电流等要求组合成电源线、天馈线、信号线系列电涌保护器（SPD）-Gas discharge tube, discharge gap, high-frequency diode, varistors, transient diode, thyristor tube, high and low pass filters and other components

This paper describes the opportunity of implementing a model of a Mho type distance relay with a three zones by using MATLAB/SIMULINK package. SimPowerSystem toolbox was used for detailed modeling of distance relay, transmission line and fault simula