Page 248 - Renewable Energy Devices and System with Simulations in MATLAB and ANSYS

Electric Generators and their Control for Large Wind Turbines 235

Machine-side Grid-side
converter converter
Prime mover DC link Isolated
transformerStatic switch Grid
PMSM PMSG
Filter

v
i abcs abcs V DC Load
v
i abc v΄ abc abc
*
P* Grid-connected PWM PWM Grid-connected V DC
i* abcs control control i *
abc
SVM SVM
*
V * Stand-alone Stand-alone v΄ abc
DC
*
i abcs control control i * abc
(a)
I DC
V DC
– ω r (L i +ψ ) V DC V DC
P* i q d d PM

Grid-connected mode – –
S
e jθ r Machine-
V
V * DC – i =0 – M side
*
d
converter
L i
V DC i d ω r q q

Stand-alone control i i
i d αβ abc abc
e –jθ r v αβ v abc
i q αβ
π

e –j(θ r – )
2
Grid-connected i q
mode
ω L

r q
V αβ_mea V d1
V d –
Im X θ r
d abc
V DC
*
V αβ
ω r
Stand-alone PMSG
mode Rotor position and speed observer
(b)
FIGURE 9.22 PMSG side converter with (a) grid and stand-alone operation; (b) rotor position and speed
observer. (From Tutelea, L. and Boldea, I., 2010 IEEE International Symposium on Industrial Electronics,
2010, pp. 1504–1509, Bari, Italy.)