.PowerSystems.AC3ph.Machines.Parameters.Synchron

Information

Equivalent circuit on diagram layer!

Specifying standard transient data both for _d and _q axis:

  - for first order write

  xtr = {0.4}   for  xtr'  = 0.4,  no xtr''
  tc  = {1.3}   for   tc'  = 1.3,   no tc''
  and
  xtr = {0.26}  for  xtr'' = 0.26,  no xtr'
  tc  = {0.06}  for   tc'' = 0.06,   no tc'

  - for second order write

  xtr = {0.4, 0.24}  for  xtr' = 0.4, xtr'' = 0.24
  tc  = {1.3, 0.04}  for   tc' = 1.3,  tc'' = 0.04

and analogous for higher order.

Sign of field current i_f:
Mathematical conventions (Z-matrix) are used for formulas in package 'Precalculation'.
Experimental conventions (if0_deg) choose the inverse sign for the field-current.
Therefore we have to use the following definition for the phase-angle of i_f:

  alpha_if0 = (if0_deg + 180)*pi/180

If the induced field-current values are not available and for pm-excitation the d-axis is treated according to the q-axis scheme (without xm_d).

Specifying equivalent circuit data:

    xsig_f, r_f, xsig_Q, r_Q correspond to a stator-based equivalent circuit.
    The number of components of xsig_r, r_r depends on the order of the model.
    For pu-input refer to stator base value R_base.

Relation rotor resistance of field winding to stator-based equivalent circuit data:

  If_base = (x_d - xsig_s)*If_nom, (x_d, xsig_s in pu)
  Rf_base = P_nom/If_base^2
  rf =  Rf/Rf_base                (in pu, stator-based).
  rf = (Rf/Rf_base)*R_base        (in SI, stator-based).
  Rf = resistance field winding   (in Ohm, true value, not scaled)