Dynamic Study and Analysis of Synchronous Generator under Sudden Short Circuit and Load Rejection Tests

In this paper, dynamic electromechanical equations of the synchronous generator (SG) are reviewed to provide insight on its behavior under different operating and test conditions. The response of the SG under these conditions is discussed and ways to determine transient and sub-transient parameters from the classical model are presented. A simplified approach for estimating SG parameters is then proposed and applied to a 1.5kVA-208V 60Hz synchronous machine whose d-axis parameters are identified through Sudden short circuit and load rejection tests made in laboratory.