Automatic tuning of out-of-step relays

A method and prototype tool for tuning out-of-step relay parameters is presented. A decision making matrix is built from dynamic simulation results. Based on this matrix, an optimization problem is formulated that determines the out-of-step relay parameters that minimize the number of cases in which the relays do not operate satisfactorily. The method has been successfully tested on a simple test case with one relay to tune, and on a four zone test case where several relays are tuned for different operating scenarios.