Contribution to Calculation of Switching Overvoltages Originated by Line Energizing in the Networks with Lumped Parameters

The possibility, which can make the calculations and analysis of switching overvoltages originated by line energizing faster and easier by using relatively simple, but exact enough, derived mathematical method and computer application, has been presented and discussed in this paper. The calculations and analysis are performed by using Laplasian transformations in the networks with lumped parameters. Line is represented with cascade array of segments that are modeled with T or Pi equivalent schemes. By using derived mathematical model of the observed system and applied method, the computer program written in MATLAB, which enables very quick and quite easy calculations of overvoltages, as well as their graphical presentation, has been made. Derived program has been used for the analysis of a number of switching overvoltages originated by line energizing for the different real cases, which are the most frequent ones used in the practice. Obtained results have been compared with the results of switching overvoltages simulation with traveling wave methods