SWITCHING SURGE OVER VOLTAGE STUDY FOR EHV POWER SYSTEMS

Abstract

In this thesis an attempt has been made to calculate switching surge overvoltage using Laplace transform technique. The merits and demerits of various methods for the calcu-lation of switching surge overvoltage, namely, field tests, analog and digital techniques, have been discussed in Chapter-I. A comparative study of different digital techniques has been made in Chapter-II. subsequently an indepth study of the Laplace transform technique and its application towards (i) unloaded line energization~ (ii) energization of resistance loaded line, (iii) energization of inductance loaded line, om. Case study of a system for various line conditions has been done and simulated on DEC-2050 Computer System in FORTRAN-IV (a listing of program is given in Appendix-II).The results obtained have been plotted on CALCOM plotter, and are given in Chapter-V. The concluding chapter, namely Chapter-VI, discusses the future scope of work in the related field.