POST CONTINGENCY LINE SWITCHING FOR OVERLOAD ALLEVIATION OR ROTATION

This paper describes a method for security control, i.e., line overloa d alleviation using line switching under a line outage condition. The assessment Is made in as precontingency case using the line outage dis tribution factors. A simple and efficient method, has been developed f or quickly assessing the line flows after the contingency and switched -out line. This quick assessment has been used to develop an interacti ve algorithm for searching a suitable line candidate for switching so as to alleviate line overload or rotation of it from one set of lines to others. The effectiveness of the algorithm is demonstrated on two s ample test systems.