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Help me getting the the magnetizing circuit of a transformer

Help me getting the the magnetizing circuit of a transformer

Help me getting the the magnetizing circuit of a transformer

(OP)
I want to get the magnetizing circuit gm & bm of a transformer, If we have Ploss (no load loss) in watts and Ie (exciting current) in pu (based on nominal voltage and MVA base)

Here is the definition from PSSE documentations:
MAG1, MAG2 MAG1 is the no load loss in watts and MAG2 is the exciting current in pu on winding one to two base MVA (SBASE1-2) and nominal voltage (NOMV1).

Here is my derivation :

Ploss pu = Ploss/(MVAbase in watts)

Vpu * Vpu * gm = Ploss pu

Because V is the nominal voltage so Vpu = 1 pu, we get gm as Ploss pu

We have Y magnetizing circuit as gm + j bm
Yabs = sqrt(gm * gm  + bm * bm) = Ipu/Vpu = Ipu (as Vpu = 1)  

sqrt(gm * gm  + bm * bm) = Ipu

Then bm = sqrt(Ipu * Ipu - gm * gm)

What is wrong with these calculations?

RE: Help me getting the the magnetizing circuit of a transformer

Is this a homework problem?

RE: Help me getting the the magnetizing circuit of a transformer

(OP)
No Sir, it is not a homework problem ... It is a work problem!

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