High voltage of two batteries – two five-levels NPC voltages sources inverters cascade. Application to the DSIM drive

Abstract

In this paper, the authors present the stability problem of the input DC voltages of the five levels neutral point clamping (NPC), when power is provided by a continuous source constant (Batterie). In order to sabilisis these DC voltages, they present and study a new cascade: two batteries-two capacitors filters-two five levels NPC voltage source inverter (VSI) applies to the double star induction machine (DSIM). The results show that the input DC voltages of the two inverters are not stable. To improve the performances of the cascade and to stabilise the input DC voltages, the authors propose in this paper a solution that uses a clamping bridge. The result confirms the good performances of the proposed solution. So it is full of promise to use this inverter in high voltage and great power applications.