Effective control and power flow management strategy for stand-alone wind system based on DFIG with storage

In this paper, an effective control is proposed to perform the operation of a Doubly Fed Induction Generator in a stand-alone application with battery storage. The proposed control technique integrates the Field Oriented Control method to regulate the amplitude/frequency of the stator voltage and DC link voltage. A power management strategy is applied to manage the power flow in the system. A pitch control is used to adjust the turbine blade angle when the wind turbine operates in the third zone corresponding to wind gusts. The main objective is to supply AC loads with a constant voltage amplitude and frequency, while meeting the load's power demand, despite high wind speeds. The proposed stand-alone application is tested in MATLAB/Simulink environment. The obtained results show satisfactory performance. The AC load is supplied with a constant voltage, the wind turbine power is limited during wind gusts and the balance between generation and demand is achieved thanks to the power flow management strategy.