METHOD FOR THE STUDY OF THE STABILITY OF CONVERTERS-FILTERS SYSTEMS

Each system Rich consists of a filter loaded by a converter absorbing a constant power is a system which is potentially unstable. In this do cument, models are developed for the study of the stability, in which current source is used to represent the converter. Using small signal hypothesis, the first model leads to analytical and numerical stabilit y criteria, which are functions of the system parameters. In the secon d part, we use a large signal model, to obtain Limit cycles of stabili ty applying numerical calculation. This way we can study the influence of the system parameters on the area where the system is stable. Ljap unov theory is applied, to describe functions which represent part of the stable area we obtained by numerical calculation.