An efficient computer method for simulating transients on transmission lines with frequency dependent parameters

A new technique for computer simulation of transients on transmission lines with frequency dependent parameters is presented. It is similar to the adaptation of Bergeron´s method, which is used in the BPA transients program, but since it uses simpler shaped response functions in the required convolution process, the method inherently requires less storage and computational effort in a time-domain simulation. The main disadvantage of the method is the possible increase in programming effort necessary to handle certain types of boundary conditions. Accuracy of the method is verified by comparison with field tests. A new algorithm is also presented for the computation of transmission line response functions. For the functions evaluated in this paper, the method was found to be extremely accurate and computationally more efficient than the Fast Fourier Transform.