Per-Unit Conversion for Machine Parameters
Impedance Conversion Equations
For machine impedance parameters (resistance, inductance, and reactance), the relationships between SI and per-unit values are defined by these equations:
R(SI) is the resistance, expressed in Ω.
Rbase is the per-unit base resistance, expressed in Ω.
R is the per-unit resistance.
X(SI) is the reactance, expressed in Ω.
Xbase is the per-unit base reactance, expressed in Ω.
X is the per-unit reactance.
L is the per-unit inductance.
Magnetic Flux Linkage Conversion Equations
For machine magnetic flux linkage parameters, the relationship between SI and per-unit values is defined by
ψ(SI) is the magnetic flux linkage, expressed in Wb.
ψbase is the per-unit base magnetic flux linkage, expressed in Wb.
ψ is the per-unit magnetic flux linkage.