AN APPROACH TO THE DIRECT ANALYSIS OF TRANSIENT STABILITY

The Transient Energy Function (TEF) method has been intensely investig ated over the last decade as a reliable and accurate tool for transien t stability assessment of multimachine power systems. In this paper we propose the Potential Energy Boundary Surface (PEBS) based method for direct analysis of transient stability. The critical value of transie nt energy and the Critical Clearing Time (T(CCT)) are evaluated withou t the need for successive calculation and memorization of the system k inetic and potential energy values along the sustained fault trajector y. The method is used for determination of output features in the trai ning phase of the neural-net based transient security assessment. The proposed approach is tested on the well-known ten-generator New Englan d test system demonstrating the validity and accuracy of obtained resu lts.