Optimization of Direct Power Control of Three-Phase Active Rectifiers by using Multiple Switching Tables

Abstract

One of the best known control methods for three-phase  active  rectifiers  is  the  so-called  Direct  Power  Control (DPC).  Control algorithm in DPC is based on the regulation of instantaneous  active  and  reactive  powers  and  incorporates  a switching  table  where  the  successive  optimal  configurations  of the  rectifier  are  stored.  Traditional  DPC  models  use  only  one switching  table  within  their  control  systems.  In  this  study,  a new DPC method is presented, based on the combination of two different  switching  tables.  By  using  Simulink  simulations,  it  is demonstrated  that  better  dynamics  and  lower  switching  stress are  achieved  in  the  rectifier  thanks  to  the  use  of  the  proposed method, in comparison to the simple switching table models.