The doubly-fed induction generator in the rotor-tied configuration

Improved efficiency of DFIG wind energy conversion systems by operating in the rotor-tied configuration

“…For the rotortied configuration, V grid = 195 V and V dc = 309 V. For the stator-tied configuration, V grid = 208 V and V dc = 330 V. The stator-referred grid-tied terminal voltages are identical in each configuration. Further details regarding the GSC design are outside the scope of this paper, but available in [13].…”

“…The control equations for the rotor-tied DFIG have the same form as those developed for the stator-tied configuration [13], [15] (7) where L s = L ls +L M , L r = L lr +L M , and σ = 1−…”

The nature of double-fed induction generators for frequency and voltage support from wind turbines

“…An alternative design method of the generator magnetic core, specic to this new conguration, was made that results in WRIMs of lesser volume, using the core material more eectively [87,88,89]. It was also proposed for application to wind turbine energy conversion systems with improved eciency due to reduced hysteresis loss in the generator core [90,91,92]. This dissertation proposes the DFIG applied in the rotor-tied conguration (RTC) to increase the reactive power generation capability.…”

“…The bounds of reactive power capability, in the conventional STC, are well known [107]. While developing the work in [92], it was noticed that more reactive power could be generated in the RTC than in the STC. However, the capability curve of the RTC is unclear and the potential to more fully utilize available capacity requires its investigation.…”