Ferroresonance modes of operation of synchronous machines

Abstract

Purpose. It is proposed to use the method of sensitivity of variable models to the initial conditions for the calculation of ferroresonance modes of operation of saturated electric machines. Methodology. The calculation algorithms are based on Newton's iterative formula. The initial values of the variables determine the area of attraction of stable or unstable modes. Results. The results are illustrated by an example of the analysis of one of the most difficult modes of operation - two-phase switching on the capacity of a synchronous generator at the breakage of the third phase. Originality. The originality of the method is the ability to determine all the stable and unstable modes, as well as the self-excitation zone of the synchronous generator. Practical value. The method is universal and can be used to investigate resonance phenomena in any circle using steel.