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  1. LinhDinh

    3-Winding Transformer Model

    Thank you very much, prc and bacon4life. This had helped us tremendously in eliminating the unnecessary work of reassessing and more importantly, the needless of sizing equipment based on erroneous results. Truly thankful. If anything more you or others would like to add, I'm all ears...
  2. LinhDinh

    3-Winding Transformer Model

    prc, The first set of figure with the higher impedance (11.81) at the lowest tap (8L) was for primary voltage (230 kV) regulation between +/- 12.5% from nominal while holding the secondary constant. An engineer suggests the voltage should be held constant at the primary, and secondary voltage...
  3. LinhDinh

    3-Winding Transformer Model

    prc, does that imply what the mfr provided is invalid? and I should just stay with what I had modeled previously?
  4. LinhDinh

    3-Winding Transformer Model

    prc, thanks for the response. At the present, there is nothing connected to the tertiary winding of the 3-wnd transformer. The fact that the mfr provided 2 different set of impedance, 1 is for primary voltage regulation while holding the secondary constant, and the 2nd set of impedance for...
  5. LinhDinh

    3-Winding Transformer Model

    I was provided the data to model a 230/34.35 kV 3 winding transformer for a wind farm with the +/- 12.5 % regulation and +/- 8 taps. The primary-secondary impedance value for the transformer is 11.80% at nominal and 12.4% (8R tap position, 258.75 kV) and 11.81% (8L tap position, 201.25 kV) all...

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