Note on the Synchronous Machine Sudden Short-Circuit Problem

ABSTRACT

The well-known analysis of the sudden three-phase short circuit on a synchronous machine is based on assumptions which are satisfied by most machines. However, some of the procedures used in the analysis are not sound although the final results are valid. This paper deals with these points, suggesting more rigorous procedures. The paper also presents numerical results to show that, even for a machine which does not quite satisfy the assumptions, the analysis yields results which are close to those given by exact calculations.