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Topic Title: PSCAD 3phase 2 winding transformer
Topic Summary: PSCAD 3phase 2 winding transformer parameters explaination
Created On: 28 November 2013 04:55 AM
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 28 November 2013 04:55 AM
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tasamyelec

Posts: 2
Joined: 28 November 2013

I am trying to model 3phase 2 winding transformer in PSCAD.
I need help with the parameters explaination.
Transformer namplate is showing : 60 Hz DELTA/WYE 10MVA
26.4kV/4.16kV %Z=5.77 X/R=16.6996

How to compute the PSCAD transformer parameters:
Positive Sequence Leakage Reactance pu
No Load Losses pu
Copper Losses pu
 28 November 2013 04:07 PM
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AdrianWint

Posts: 271
Joined: 25 May 2006

From the information you have given - you can't! More transformer info needed. The iron & copper losses are usually found empirically.
 28 November 2013 04:34 PM
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tasamyelec

Posts: 2
Joined: 28 November 2013

So why we can model the transformer in EMTP using nameplate data only? Is there a different transformer model in PSCAD that needs only transformer nameplate data to model the transformer without additional tests?
 22 January 2014 02:32 PM
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shikinjamil

Posts: 1
Joined: 03 December 2013

Hi Tasa,

You have enough information to model your basic transformer.

you can now calculate your positive sequence leakage reactance and Copper losses.

positive seq leakage reactance and copper losses can be calculated using the following formula

X = Z sin (atan(X/R))
R = Z cos (atan (X/R))

No Load losses are usually set to be very minimal say 0.0001 p.u.

Statistics

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