Wildsoldier PE
Well-known member
- Joined
- Aug 19, 2010
- Messages
- 290
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- 14
The Z formula to change the Z values for newbase is
Z= Zpu [V^2ll oldbase / V^2 ll new base] [stotal New base/Stotal Old base)
Book show
Zpu = .07 OK
Stotal old = 20MVA OK
Stotal new = 15MVA OK
Now i think that the Vbaseold = Vbasenew = 15kV because I have to assume that the Generator base Voltage value is 15KV same as Primary of the base voltage value of the transformer =15KV If the problem show the voltage value of the generator to 10KV now thats other story. Answer shall be .05 PU B
Z= Zpu [V^2ll oldbase / V^2 ll new base] [stotal New base/Stotal Old base)
Book show
Zpu = .07 OK
Stotal old = 20MVA OK
Stotal new = 15MVA OK
Now i think that the Vbaseold = Vbasenew = 15kV because I have to assume that the Generator base Voltage value is 15KV same as Primary of the base voltage value of the transformer =15KV If the problem show the voltage value of the generator to 10KV now thats other story. Answer shall be .05 PU B