Patent ID: 11870256
Assignee: SPACE PTE. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method for optimizing usage of electricity from a grid and energy storage comprising:
forecasting a predetermined number of hours of load at a predetermined interval to determine a forecasted load profile;
subtracting a peak load from the forecasted load profile by a maximum amount of electricity that can be charged into or discharged from the energy storage to determine a subtracted peak;
smoothening peaks within a 30-minute period that are more than the subtracted peak to flatten out a consumption profile around a forecasted peak so that a flattened period covers the peak load to obtain a final forecast result;
determining optimized battery setpoint actions based on the final forecast result and energy storage operating constraints comprising:
applying the energy storage operating constraints; and
minimizing an objective function that can be expressed in the following expression:, Objective
  =
  
    
      
        ∑
        
          t
          ∈
          T
        
      
      ⁢
      
        (
        
          
            
              P
              
                grid
                ,
                t
              
            
            ×
            
              μ
              t
            
          
          +
          
            
              P
              
                bat
                ,
                t
              
            
            ×
            λ
          
        
        )
      
    
    +
    
      2
      ×
      
        P
        
          grid
          ,
          
            t
            ∈
            T
          
        
        peak
      
      ×
      ucc
    
  

where
t∈T refers to a set of time steps in optimization horizon, Pgrid,t refers to electricity drawn from the power grid at time step t, kWh, Pbat,t refers to electricity charged into/discharged from battery at time step t, kWh, Pgrid,t∈tpeak refers to peak electricity drawn from the power grid during optimization horizon, kWh, μt refers to electricity price at time step t, Currency unit/kWh, λ refers to battery lifespan coefficient, Currency unit/kWh, wherein the steps of forecasting, subtracting, smoothening and determining are performed using at least one processor; and

executing, by an energy management system, the optimized battery setpoint actions to control usage of the grid and energy storage.