Leakage Saturation Curve

The saturation characteristic of the stator leakage reactance is specified using the short-circuit test results in pairs of per-unit  current and per-unit voltage (Ipu, Vpu).  The first point should be (0.0, 0.0) and the second point should be (I2, V2), where I2 is the current in per unit at which the onset of saturation occurs and V2 is the corresponding pu voltage.  

All I values will be internally re-scaled based on the actual current at the voltage V2 specified by the second point.  The voltage must be in per unit.  If less than 10 points are available the last pair entered must be (-1.0, -1.0).  The program in this case replaces the voltage with the saturation factor and re-scales the current to a per unit value based on the unsaturated value of inductance input in the previous section.  That is, the initial slope of the I-V curve should correspond to the stator and rotor unsaturated leakage reactances:

Where,

The saturation factors are available as internal outputs.