Patent ID: 11862969
Assignee: TIANJIN UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 4:
5. The optimal configuration method for the hybrid energy storage of the grid-connected wind storage power generation system according to claim 1, wherein the hybrid energy storage capacity optimization model for the full life cycle of the wind farm has constraints, comprising:
an energy storage charge and discharge power constraint:, {
  
   
    
     
      
       
        P
        
         c
         ,
         min
        
       
       <
       
        P
        
         c
         ,
         t
        
       
       <
       
        P
        
         c
         ,
         max
        
       
      
     
    
    
     
      
       
        P
        
         d
         ,
         min
        
       
       <
       
        P
        
         d
         ,
         t
        
       
       <
       
        P
        
         d
         ,
         max
        
       
      
     
    
   
   ;
  
 

a power balance constraint:, S
   ⁢
   O
   ⁢
   
    C
    t
   
  
  =
  
   {
   
    
     
      
       
        
         S
         ⁢
         O
         ⁢
         
          C
          
           t
           -
           1
          
         
        
        +
        
         
          η
          c
         
         ⁢
         
          P
          
           c
           ,
           t
          
         
         ⁢
         Δ
         ⁢
         
          t
          /
          
           S
           Wh
          
         
        
       
      
     
     
      
       
        
         S
         ⁢
         O
         ⁢
         
          C
          
           t
           -
           1
          
         
        
        -
        
         
          P
          
           d
           ,
           t
          
         
         ⁢
         Δ
         ⁢
         
          t
          /
          
           (
           
            
             S
             Wh
            
            ⁢
            
             η
             d
            
           
           )
          
         
        
       
      
     
    
    ;
     
    and
   
  
 

an energy storage state of charge (SOC) constraint: SOCmin≤SOCt≤SOCmax;
wherein, Pc,t is an energy storage charge power at time t, in MW; Pd,t is an energy storage discharge power at time t, in MW; Pc,min is a lower limit of the energy storage charge power, in MW; Pd,min is a lower limit of the energy storage discharge power, in MW; Pc,max is an upper limit of the energy storage charge power, in MW; Pd,max is an upper limit of the energy storage discharge power, in MW; ηc is an energy storage charge efficiency; ηd is an energy storage discharge efficiency; Δt is a control interval, in min; SWh is a rated capacity of the energy storage, in MW; SOCt is an energy storage at time t; SOCt-1 is an energy storage at time t−1; SOCmin is a lower limit of the energy storage; SOCmax is an upper limit of the energy storage.