Fig 1.
0 basic diagram of DFIG-based wind turbine with a crowbar protection.
Fig 2.
Stator flux in d-q reference frame.
Fig 3.
Proposed modified rotor current control scheme.
Table 1.
DFIG parameters.
Fig 4.
The power system with DFIG-based wind turbine under simulation study.
Table 2.
Comparative analysis of rotor and stator parameters during single-phase fault.
Table 3.
Comparative analysis of rotor and stator parameters during two-phase fault.
Table 4.
Comparison of rotor and stator transient currents of different FRT.
Fig 5.
Three-phase rotor currents during single-phase fault without protection.
Fig 6.
Three-phase stator current during single-phase fault without protection.
Fig 7.
q axis rotor currents during single-phase fault without protection.
Fig 8.
d axis rotor currents during single-phase fault without protection.
Fig 9.
Stator voltage dip during single-phase fault.
Fig 10.
Three-phase stator current during single-phase fault with conventional protection schem.
Fig 11.
Three-phase rotor currents during single-phase fault with conventional protection scheme.
Fig 12.
q axis rotor current during single-phase fault with conventional protection scheme.
Fig 13.
d axis rotor current during single-phase fault with conventional protection scheme.
Fig 14.
Three-phase stator currents during single-phase fault with enhanced crowbar protection scheme.
Fig 15.
Three-phase rotor current during single-phase fault with enhanced crowbar protection scheme.
Fig 16.
q axis rotor current during single-phase fault with enhanced crowbar protection scheme.
Fig 17.
d axis rotor current during single-phase fault with enhanced crowbar protection scheme.
Fig 18.
Three-phase stator currents during two-phase fault without protection.
Fig 19.
Three-phase rotor currents during two-phase fault without protection.
Fig 20.
q axis rotor current during two-phase fault without protection.
Fig 21.
d axis rotor current during two-phase fault without protection.
Fig 22.
Stator voltage dip during two-phase fault.
Fig 23.
Three-phase rotor current during two-phase fault with conventional protection scheme.
Fig 24.
Three-phase stator current during two-phase fault with conventional protection scheme.
Fig 25.
q axis rotor current during two-phase fault with conventional protection scheme.
Fig 26.
d axis rotor current during two-phase fault with conventional protection scheme.
Fig 27.
Three-phase rotor current during two-phase fault with enhanced crowbar protection scheme.
Fig 28.
Three-phase stator current during two-phase fault with enhanced crowbar protection scheme.
Fig 29.
q axis rotor current during two-phase fault with enhanced crowbar protection scheme.
Fig 30.
d axis rotor current during two-phase fault with enhanced crowbar protection scheme.