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Переходные процессы в системах электроснабжения. Учебное пособие

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


6-20


6-20


35
110
220
330
󰇛󰇜
61
60
67
83
88
91
󰇛󰇜
17
20
18 5 3
4
󰇛󰇜
11
15
7 8 7
4
󰇛󰇜
11
5 8 4 2 1

-
-
     


  

 -40    
 
      
       
      
  ;
      
      


4.2
           

        
   
                             
42
 
      
 
4.2. Назначение расчетов коротких замыканий
        
         




     
 
       

     

      

          
         . 
4.3. Допущения при расчетах токов короткого замыкания
        
  
        

43

      );
     







     

  




       

    
   
;

           

    
      

 
.
 
             
.
,
  

      
-
    
44
     
);
      

-
    

 


4.4. Расчетные схемы и параметры их элементов
   
       
           

    
 
       
        
            
     - 
  
).         
   

    

 

    
  

45
- 
        

 
        
󰇛 󰇜   

   
 


   




󰇛󰇜 

󰇛󰇜

 
󰇛󰇜
      
      


.

 
 
                       
   

    



 
  


 
     

.

                                     
     
 
      

󰇛 󰇜  



 

󰇛󰇜.
  
  
  󰇛󰇜    


󰇛 󰇜    




:



46


  󰇛


󰇜
. (4.1)
     
    

   



  󰇛󰇜   


.



  

 

      
  t
   t > 0.
      
           
                 
         
.
   
    (%

.
󰇛 󰇜    


   
  
󰇛 󰇜 , 


,

,
(%


,

,



 
     
   , 
󰇛󰇜
,

(%); 
      


󰇛󰇜 

󰇛󰇜;   


.
󰇛󰇜

 
   
󰇛󰇜
󰇛 󰇜 


.
  () 
   
47

󰇛 󰇛
󰇜  󰇛


󰇜 

    󰇛  


󰇜; 


󰇜.  

; 
      
      󰇛  6-󰇛  󰇛
 

󰇜      


󰇜  


󰇜  



󰇛    󰇛 󰇛

󰇜 

    󰇛

󰇜  


󰇜  




󰇜;
          
  




    :







 


󰇛 󰇜; 
.
4.5. Схемы замещения и их преобразования
    
          
    

   
 
        

       
 
4.
48

-     
        
      
     
   , [9].
          
-
  
      
  
               



      , 4.1, )   4.1,   


     
 
49
Наименование
элемента
Расчетная схема
Схема замещения
   
 
 
 
 
 
 
    
 4.3
50




 
      
 





);  
         4.1,   
     4.1, ),  
;  
;  

4.1, 

       :

; 



  
     

 

     


󰇛

󰇛




󰇜

  

󰇜

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