Modeling of wind turbine based on dual DFIG generators

Abstract

In order to investigate a viable approach to fully exploit the wind speed, the present work investigates the application of a novel wind turbine consisting of dual doubly-fed induction generators (DFIG). The model can be further used to apply in areas where the winds are high to achieve high conversion efficiency in order to produce large electric power and increase the wind turbine capacity with an economy of hardware on the one hand, and to reduce the installation cost on the other. Furthermore, this model is always guarantees the continuity of power production because if one generator fails, the second generator will keep working until the broken one is repaired. The proposed model of the wind turbine based on dual doubly-fed induction generators (WT-dual-DFIG) were using the indirect field-oriented control (IFOC) was validated by wind turbine based on single doubly-fed induction generator (WT-single-DFIG) in MATLAB/Simulink. The results of simulation show that the simulated responses of the WT-dual-DFIG increased the power by a factor of about 14.3% compared to a WT-single-DFIG due to the use of a variable speed dual-DFIG. Finally, we can say that the WT-dual-DFIG model is strongly developed and could be applied in the coming years.

Analysis of magnetic saturation effects in the squirrel cage induction generators

“…The direction of stator current is indicated by Figure 1. So, the stator voltage equation is expressed by (1). With the convention of the positive direction of stator and rotor currents, the stator flux becomes as given by (2).…”

“…Power qualities such as stability, harmonics, and distortion are the main criteria of such energy sources. These qualities must be discussed particularly in induction generators which are recently considered as the main device in wind energy conversion systems due to their robust construction, low-cost maintenance and no separate excitation system [1]- [6]. From different factors having destructive effects on power qualities, magnetic saturation is considered as an important factor causing harmonic components through stator voltages and currents.…”

Comparative study between PI and SMC controllers for DFIG using fuzzy wind power estimator

“…𝐿 𝑠 , 𝐿 𝑟 and 𝑀 𝑠𝑟 represent respectively the inductances of the stator, the rotor and the mutual. The expression of the electromagnetic torque is written as (8).…”