Patent ID: 11923681
Assignee: NORTH CAROLINA STATE UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. An energy storage device, comprising:
a controller configured to
acquire data from one or more loads connected to the energy storage device (ESD):
model the one or more loads based on the acquired data and on statistics using historical data of the one or more loads;
estimate a state of charge of the ESD based upon forecasted power consumption of the one or more loads, wherein the state of charge is determined using, SOC
    ⁢
    
     (
     
      t
      +
      1
     
     )
    
   
   =
   
    
     SOC
     ⁢
     
      (
      t
      )
     
    
    -
    
     
      sign
      ⁡
      (
      
       
        
         P
         f
        
        (
        t
        )
       
       -
       
        
         P
         
          D
          ⁢
          G
         
         f
        
        (
        t
        )
       
      
      )
     
     
      [
      
       a
       ×
       
        
         (
         
          
           ❘
           "\[LeftBracketingBar]"
          
          
           
            
             P
             f
            
            (
            t
            )
           
           -
           
            
             P
             DG
             f
            
            (
            t
            )
           
          
          
           ❘
           "\[RightBracketingBar]"
          
         
         )
        
        b
       
      
      ]
     
    
   
  
  ,, where:
a and b are system parameters,
Pf (t) is a sum of all forecasted load power consumptions, and
PfDG(t) is a total forecasted distributed generator generation at a time t;
determine an operational status of each of the one or more loads based on at least the estimate of the state of charge of the ESD and a category of each of the one or more loads; and
control each load based on the determined operational status.