The above model is useful in studying and testing the distance relay when a fault occurs at 75% of the length of the line because the line is divided into four equal parts.
The parameters of the line per unit length depend on the tower configuration (geometrical dispositions of conductors), the material of the conductors, the ground resistivity, among other quantities. MATLAB provides a routing for transmission line parameter calculation https://www.mathworks.com/help/physmod/sps/powersys/ref/power_lineparam.html