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  1. O

    3-winding transformer impedance at extreme taps.

    I have the following data for a 3-winding transformer S = 350/350/100 MVA (HV/LV/TV) U = 410/230/36 kV (HV/LV/TV) OLTC range: +/-12x1.5% located at HV side Z(HV-LV) nominal tap = 13% @350 Z(HV-LV) max. tap = 14% @350 Z(HV-LV) min. tap = 13% @350 Can any transformer expert determine the ratio...
  2. O

    100 Mvar shunt reactor total power losses

    Hello everyone, What are the estimated total power losses of currently produced 220 kV 100 Mvar shunt reactors? Information about total power losses of a shunt reactor with similar power or at a different voltage (e.g., 110 or 400) will also be useful.
  3. O

    Offshore power transformer YNd1 vs YNd11

    Thank you all for your answers. You have confirmed my way of thinking. I am aware of the conditions of transformers parallel operation, but in this example it will not happen, because there is only one offshore transformer. In the context of autotransformers, from my observations, it is not a...
  4. O

    Offshore power transformer YNd1 vs YNd11

    Hello everyone, I have a question regarding the vector group of a power transformer installed in the configuration shown in the attached diagram. Which option would be more appropriate for offshore power transformer, for such a setup – YNd1 or YNd11? A brief description of the configuration...

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