Log Tab

The Log Tab displays the results of the calculation parameters as described in How to Generate [Z]-Based Transformer Parameters.

There are 4 Z-based Transformer models available, a 2-windings transformer, a 2-windings transformer with fault, a 3-windings transformer, and a 3-windings transformer with fault.

Example of a three-phase three-winding transformer.

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HyperTransfo Report                                   Thu Mar 03 14:31:34 EST 2022
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COMMENTS: 

Data for three-phase three-winding transformer.

PARAMETERS:

Nominal Frequency (Hz): 60.0
Nominal Power (VA)    : 3.0E8
Number of windings    : 3

---------------------------------------
Winding      Winding Voltage  Resistance
               (Vrms)           (pu)
---------------------------------------
w1                132790.600      0.010
w2                 63393.000      0.020
w3                 50000.000      0.030
---------------------------------------

EXCITATION DATA:
--------------------------------------------------------------------------------
              No Load       No Load    Short-circuit Short-circuit Short-circuit
Sequence     Excitation     Losses       Reactance     Reactance     Reactance
              Current         (W)           X12           X13           X23
                                            (pu)          (pu)          (pu)
--------------------------------------------------------------------------------
Positive          0.4280    135730.000        0.0874        0.3426        0.2096
Zero              0.4280    135730.000        0.0734        0.2626        0.1856
--------------------------------------------------------------------------------


INDUCTANCE MATRIX TRANSFORMER PARAMETERS:

R = 
        1.7633        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000
        0.0000        1.7633        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000
        0.0000        0.0000        1.7633        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000
        0.0000        0.0000        0.0000        0.8037        0.0000        0.0000        0.0000        0.0000        0.0000
        0.0000        0.0000        0.0000        0.0000        0.8037        0.0000        0.0000        0.0000        0.0000
        0.0000        0.0000        0.0000        0.0000        0.0000        0.8037        0.0000        0.0000        0.0000
        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.7500        0.0000        0.0000
        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.7500        0.0000
        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.0000        0.7500

X = 
    41431.5358        0.0000        0.0000    19775.5778        0.2262        0.2262    15589.8352        0.8858        0.8858
        0.0000    41431.5358        0.0000        0.2262    19775.5778        0.2262        0.8858    15589.8352        0.8858
        0.0000        0.0000    41431.5358        0.2262        0.2262    19775.5778        0.8858        0.8858    15589.8352
    19775.5778        0.2262        0.2262     9442.3257        0.0000        0.0000     7444.2557        0.1268        0.1268
        0.2262    19775.5778        0.2262        0.0000     9442.3257        0.0000        0.1268     7444.2557        0.1268
        0.2262        0.2262    19775.5778        0.0000        0.0000     9442.3257        0.1268        0.1268     7444.2557
    15589.8352        0.8858        0.8858     7444.2557        0.1268        0.1268     5874.0329        0.0000        0.0000
        0.8858    15589.8352        0.8858        0.1268     7444.2557        0.1268        0.0000     5874.0329        0.0000
        0.8858        0.8858    15589.8352        0.1268        0.1268     7444.2557        0.0000        0.0000     5874.0329

L = 
      109.9006        0.0000        0.0000       52.4563        0.0006        0.0006       41.3533        0.0023        0.0023
        0.0000      109.9006        0.0000        0.0006       52.4563        0.0006        0.0023       41.3533        0.0023
        0.0000        0.0000      109.9006        0.0006        0.0006       52.4563        0.0023        0.0023       41.3533
       52.4563        0.0006        0.0006       25.0465        0.0000        0.0000       19.7465        0.0003        0.0003
        0.0006       52.4563        0.0006        0.0000       25.0465        0.0000        0.0003       19.7465        0.0003
        0.0006        0.0006       52.4563        0.0000        0.0000       25.0465        0.0003        0.0003       19.7465
       41.3533        0.0023        0.0023       19.7465        0.0003        0.0003       15.5814        0.0000        0.0000
        0.0023       41.3533        0.0023        0.0003       19.7465        0.0003        0.0000       15.5814        0.0000
        0.0023        0.0023       41.3533        0.0003        0.0003       19.7465        0.0000        0.0000       15.5814

RmagPos = 
   389744.5690    88823.5272    55256.7597

RmagZero = 
   389783.5434    88832.4096    55262.2854

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REFERENCES
[1] HYPERSIM Reference guide manual for software version 9.1.
[2] Dommel, H., et al., Electromagnetic Transients Program Reference Manual (EMTP Theory
Book), 1986.
[3] A transformer model for winding fault studies, Partrick Batard, Pierre Bertrand, Michel Meunier,
IEEE, Vol 9, No 2, April 1994.

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