ATP-benchmarks in electric power systems

11. Some mathematical analyses of electric circuit phenomena
Appendix 1 Symmetrical/Asymmetrical current breakings

Contents

In the figure below, short circuit currents and TRVs for symmetrical and asymmetrical breaking currents are shown. For both the same circuit parameters and voltage conditions are applied. Only the difference is the point on wave short-circuiting timings.

In symmetrical current breakings the rate of change of the currents are highest, so the rate of rises and the peak values of TRVs are highest. While breaking asymmetrical currents, the rate of change of the currents are, more or less, lower than the cases of symmetrical breaking currents. Therefore lower rates of rises and peak values of TRVs are created.

This page is based on Prof. E.Haginomori's lectures in Tokyo Institute of Technology, and edited by Japanese ATP User Group. Copyright (C) Eiichi Haginomori and Japanese ATP User Group.