Tinh123
Electrical
- Nov 16, 2006
- 27
Thanks Dandel, davidbeach, and others who gave me very beneficial suggestions. I have recently worked on a problem of fault current contribution from the surrounding elements on a high voltage bus 138 kV. What I noticed is that when i changed one set of generation and transformer using completely different impedance values for both the transformer and generator- the value of the fault current contribution of the new set of generator and transformer to the bus fault is significantly less. As anticipated, If the fault contribution from one element is less then the overall bus fault should be decreased. The results I got indicated differently. The fault current contribution of the new element to the bus fault is less, however, the fault contribution from other circuits are increased significantly; hence, it increases the overall bus fault. Why would this be?