A novel online adaptive sensorless identification and control of doubly fed induction generator

This paper presents a new method for sensorless identification and adaptive control of doubly fed induction generator (DFIG) with inner and outer loop control. The method uses an online identification and adaptively tuned PID for sensor-less speed identification observing angular deviations in DFIG. Further an adaptive outer loop control structure is developed based on the proposed architecture for analyzing active and reactive power response. The main advantage of the proposed architecture is the sensorless operation and adaptive nature of the controller that a) allows sensor free operation, b) avoids Phase Locked Loop (PLL) errors, c) is capable of delivering optimal active and reactive power. The proposed architecture is evaluated using simulations and experimental test bed.