Construction of largest equivalent systems for power system simulator

This paper presents the dynamic reduction algorithm including network reduction for large-scale power systems to develop the largest equivalent systems. In particular, the proposed reduction algorithm is suitable for the real time digital simulator. The load angle of the synchronous machine is used as a state variable to identify or aggregate the coherent synchronous machine groups. In this paper, the equivalent systems that preserve the desired property of the original systems are evaluated to verify the algorithm with dynamic simulation for given power system faults. The results of comparison between the original systems and equivalent systems are described to provide the accuracy and reliability. Copyright © 2005 John Wiley & Sons, Ltd.