An Efficient Faults Calculation Method Including Mutually Coupled Lines of Power System

Abstract

It is necessary to take the effects of mutual couplings into account when unbalanced faults are to be calculated in such as transient stability study.
When the method based on symmetrical co-ordinates is applied to faults calculation, it has been needed in conventional method to construct the zero sequence network configurated more complex than other networks so far. Then, the application of faults calculation including mutual couplings to the analysis on bulk power system model has been considerably difficult for long time.
This report presents the newly developed method to calculate the effects of mutual coupling in multi-faults calculation under same configuration and with no change for all sequence networks. The validity of proposed method was verified through the application to transient stability analysis for power system model.