Patent ID: 11899067
Assignee: SHANGHAI JIAO TONG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. The current control method according to claim 13, wherein the feedforward voltage of the first method is expressed by:

uDUT′=Uc×(ninv−nrec),, wherein uDUT′ is the feedforward voltage used for compensation, Uc is a DC component of an SM capacitor voltage, ninv is the inserted number of the tested SMs in the inverting mode in the next control cycle, and nrec is the inserted number of the tested SMs in the rectifying mode in the next control cycle;
the feedforward voltage in the second method is expressed by:, u
    
     D
     ⁢
     U
     ⁢
     T
    
    ′
   
   =
   
    
     u
     
      D
      ⁢
      U
      ⁢
      T
     
    
    ×
    
     (
     
      
       ω
       0
      
      
       s
       +
       
        ω
        0
       
      
     
     )
    
   
  
  ,
 

wherein uDUT′ is the feedforward voltage used for compensation, uDUT the terminal pulse voltage signal obtained by the voltage sampler, ω0 is a corner frequency of the low-pass filtering, and s is a complex variable in a transfer function.