Influence of Transmission Lines Inhomogeneities on Transient Signal

The paper compares the parameters of current and voltage transient signals in electric lines of high and medium voltage classes. The paper compares frequency dependences of their propagation coefficient. Modelling results show the destructive influence of concentrated inhomogeneities on the leading edge of the travelling voltage wave. It is shown that the small length of medium voltage class lines allows to obtain acceptable measurement errors of fault location not exceeding the similar one in high voltage class lines.