Patent ID: 11936186
Assignee: CHINA ELECTRIC POWER RESEARCH INSTITUTE
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 0:
1. A method for evaluating a degree of frequency regulation urgency of a generator set, comprising:
obtaining a power grid frequency fluctuation trend under a normal operation condition and a power grid frequency fluctuation trend under a fault condition through simulation analysis based on a proportion η of an installed capacity of each of a plurality of types of generator sets in a regional power grid, and obtaining a degree P of frequency regulation participation of each of the plurality of types of generator sets based on the power grid frequency fluctuation trend under the normal operation condition and the power grid frequency fluctuation trend under the fault condition; and
calculating a degree U of frequency regulation urgency of each of a plurality of types of generator sets in a power system based on the degree P of frequency regulation participation of each of the plurality of types of generator sets and the proportion η of the installed capacity of a respective type of generator set corresponding to the degree P of frequency regulation participation, and implementing frequency regulation participation of the regional power grid in the power system based on the degree U of frequency regulation urgency;
wherein the degree U of frequency regulation urgency and the degree P of frequency regulation participation of each of the plurality of types of generator sets in the power system are calculated using the following formulas:, {
  
   
    
     
      
       
        U
        i
       
       =
       
        
         (
         
          1
          -
          
           P
           i
          
         
         )
        
        ⁢
        
         ▯η
         i
        
       
      
     
    
    
     
      
       
        P
        i
       
       =
       
        
         S
         i
        
        S
       
      
     
    
   
   ,
  
 

wherein Ui denotes the degree U of frequency regulation urgency of an i-type generator set in the power system, Si denotes a frequency regulation integral area of the i-type generator set deducting a deadband within a frequency fluctuation time T, and S denotes a frequency regulation integral area within the frequency fluctuation time T of the power grid, where i=1, 2, and 3, indicating that the types of generator sets are a thermal power generator set, a hydropower generator set, and a nuclear power generator set, respectively;
wherein a degree Pi of frequency regulation participation of each of the plurality of types of generator sets in primary frequency regulation is calculated using the following formula:, P
    i
   
   =
   
    
     
      ∫
      0
      T
     
     
      
       (
       
        f
        -
        
         D
         i
        
       
       )
      
      ⁢
      d
      ⁢
      t
     
    
    
     
      ∫
      0
      T
     
     fdt
    
   
  
  ,
 

where f denotes a power grid frequency variation, and Di denotes a deadband of a speed regulation system of the i-type generator set.