Power electronics and electrical drives have played an increasingly important role in our societydue to  the  capabilities  of processingand  controllingelectrical  energy  in  an  elegant  way  with  high efficiency  and  performance.Therefore,  they can  improve  industrial  productivity,  energy  efficiency, and  environmental  protection  by  means  of  robotics,  factory  automation,  and  alternative  energy systems. Besides traditional industries, power electronics and electrical drives have deeply penetrated the  sustainable  and  renewable  energy  areas  in  the  last  decade.  In  power  electronics  and  electrical drives, the controllers andobservers have always been key issues since they influence drastically the overall  system  performances  and  may  work in  some special  environments.  

Since  power  electronics and electrical drives are highly non-linear and submitted to perturbations, some crucial requirements are needed for the controllers and observers in the applications of the power electronics and electrical drives,  such  as  strong  robustness,  fast  response  speed,  and  high  tracking  precision.  

Therefore,  it  is meaningful  and  challenging  to  develop  novel  theories,  techniques  and  tools  to  design  the advanced controllers and observers for the power electronics and electrical drives. This Special Session aims to provide a research venue for exchanging and discussing the technical trends and challenges of control and  observation  in  power  electronics  and  electrical  drives.  Both  theory-and  application-driven studies are invited for participation.