Patent ID: 11954210
Assignee: STATE GRID CORPORATION OF CHINA
Field: Digital communication (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 12:
13. The hierarchical health index evaluation apparatus for an intelligent substation according to claim 10, further comprising:
a layer-based health index correction module, configured to use, as a layer-based basic health index, the layer-based health index obtained by the layer-based health index calculation module, and correct the layer-based basic health index, wherein the layer-based health index correction module is specifically configured to:
traverse all layers to obtain each device Ai, k in each layer, wherein Ai,k represents a kth device in an ith layer, and j is a positive integer;
calculate a layer-based correction weight δij between the ith layer and a jth layer, initialize δij to 0, and traverse each correlated device Ai,kl of the device Ai,k, wherein the correlated device Ai,kl represents an lth correlated device of the kth device in the ith layer, and l is a positive integer; and when the correlated device Ai,kl belongs to the jth layer, and i≠j, δij+1=δij+wi,kl, wherein wi,kl represents a device importance weight corresponding to the correlated device Ai,kl; and
correct the layer-based basic health index based on the layer-based correction weight δij and the following formula:, CH
   i
  
  =
  
   Max
   ⁢
     
   
    (
    
     0
     ,
     
      
       BCH
       i
      
      -
      
       
        γ
        l
       
       ⁢
       
        
         ∑
         
          j
          =
          1
         
         3
        
         
        
         
          
           δ
           i
           j
          
          
           ∑
           
            w
            j
           
          
         
         ⁢
         
          (
          
           100
           -
           
            BCH
            j
           
          
          )
         
        
       
      
     
    
    )
   
  
 

wherein CHi represents a corrected layer-based health index of the ith layer; BCHi represents a layer-based basic health index of the ith layer, and i is a positive integer; γl represents layer-based correlation correction strength, and Σwj represents a sum of device importance weights of all devices in the jth layer; and when i=j, the layer-based correction weight δij is 0.