Nomenclature
v, i, ψ
Instantaneous voltage, current and flux
fFrequency
uControl signal
V, I, EVoltage, current and internal voltage magnitudes
R, L, CResistance, inductance, capacitance
Z, YImpedance and admittance
Lls, LlrStator and rotor leakage inductances
LmMutual inductance
Ls, LrStator and rotor inductances (Ls = Lm + Lls; Lr = Lm + Llr)
P, QActive and reactive powers
SSwitching function
θm, θrMechanical rotor angle, electrical rotor angle
ωe, ωm, ωrSynchronous angular frequency, mechanical rotor angular speed, electrical rotor angular speed
Tem, TmElectromagnetic and mechanical torques
nmRotation speed
np, HNumber of pole pairs, inertia constant
Xm, Xl, XkMutual, leakage and damping reactance
kp, kiProportional gain, integral gain
H(s)Transfer function
Hss(s), Hr(s),Transfer functions for SSC currents, rotor
Hdc(s), Hpll(s)currents, dc-bus voltage and PLL
SSC; LSCSource-side converter; load-side converter
Gm; PmGain margin and phase margin
Re; ImReal and imaginary axes
AVRActive voltage regulator
PLLPhase-locked loop
PWMPulse width modulation