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Topic Title: +ve sequence and zero sequence impedance of generator
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Created On: 22 February 2010 02:56 AM
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 22 February 2010 02:56 AM
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Blacksodium

Posts: 3
Joined: 19 January 2010

can we find the positive sequence [X,R] and zero sequence impedance [X,R] from the data generator given ? :-

X/R ratio = 10
MVA = 100
kV =132kV
Fault level = 7200

i'm only get to find their generator sub-transient impedance Xd" by this formula :-

generator fault level (MVA) = generator capacity (MVA) / generator subtransietn impedance (Xd")

we can get their Xd" = 1.39%... after that i dont know how to continue their calculation..
 19 April 2010 02:01 PM
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iqbalkhan

Posts: 44
Joined: 26 January 2009

actually at the rated conditions the Xs =X1 that is synchronous impedance is positive sequence impedance which is actually reactance
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