Speed sensorless MPPT control of stand-alone SEIG based wind-battery hybrid system

An efficient speed sensorless stand-alone wind-battery hybrid system is proposed in this work. A simple Maximum power point tracking (MPPT) controller scheme is presented for optimal control of power. Furthermore, a battery controller is used, which maintains dc link voltage. The merit of the system is that it doesn't require an anemometer and an encoder for sensing the wind speeds and rotor speed for MPPT control. In addition, the battery controller is assisting the dc link voltage to maintain the set value for over and under generation periods. The results show that the controller can extract maximum power and regulate the dc link voltage irrespective of wind speed variations.