Experimental results on a PBC of a doubly-fed induction generator interconnected with an induction motor

Abstract

This paper concerns the control of an electromechanical system consisting of a Doubly-Fed Induction Generator (DFIG), driven by a prime mover that can supply or extract mechanical power and an Induction Motor (IM). The stator of the IM is connected to the stator of the generator whose rotor voltage is regulated by a bidirectional converter. A passivity-based controller (PBC) is proposed to regulate the motor mechanical speed and the rotor flux norm. Since this kind of controllers achieve stabilization via energy--balancing, regulation of the power flow in the system can be naturally incorporated. Experimental results are presented to illustrate the main points of our paper. A classical PI controller is also applied to compare the performances of the different approaches.