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.